Message ID | 20170321131623.6396-1-lq@chinaffmpeg.org |
---|---|
State | Superseded |
Headers | show |
On 2017-03-21 13:16, Steven Liu wrote: > @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config openssl openssl/ssl.h OPENSSL_init > check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 || > die "ERROR: openssl not found"; } > enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable qtkit_indev; } > +enabled libxml2 && require_pkg_config libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 When you use require_pkg_config you don't need to add -lxml2 at the end, it'll get the needed libs and cflags from the pkgconfig file. Also, there's no need to send a new patch/thread for every small change. This is a large patch which will probably need a lot of reviewing before it's merged. At this pace there'll be 30 versions before long. An aknowledgement that the review is considered and that a later patch will address it should be enough, IMHO.
Ricardo Constantino <wiiaboo@gmail.com>于2017年3月22日 周三上午12:27写道: > On 2017-03-21 13:16, Steven Liu wrote: > > @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config > openssl openssl/ssl.h OPENSSL_init > > check_lib openssl/ssl.h SSL_library_init > -lssl -lcrypto -lws2_32 -lgdi32 || > > die "ERROR: openssl not found"; } > > enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || > disable qtkit_indev; } > > +enabled libxml2 && require_pkg_config libxml-2.0 > libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 > > When you use require_pkg_config you don't need to add -lxml2 at the end, > it'll get the needed libs and cflags from the pkgconfig file. > > Also, there's no need to send a new patch/thread for every small change. > This is a large patch which will probably need a lot of reviewing before > it's merged. At this pace there'll be 30 versions before long. An > aknowledgement that the review is considered and that a later patch will > address it should be enough, IMHO. > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > I don't know how to replay to an old thread with the patch by git send-email :(
On 21 March 2017 at 22:50, Steven Liu <lingjiujianke@gmail.com> wrote: > I don't know how to replay to an old thread with the patch by git > send-email :( > > Find the email you want to reply to in http://lists.ffmpeg.org/pipermail/ffmpeg-devel/2017-March/thread.html and check the link in the address. It should contain the message ID you pass to "git send-email --in-reply-to". Or in Gmail, select Show Original in the post menu and that also shows the Message ID to use in --in-reply-to.
Test Reply mail use git send-email
> On Mar 21, 2017, at 08:16, Steven Liu <lq@chinaffmpeg.org> wrote: > > v2 fixed: > 1. from autodetect to disabled > 2. from camelCase code style to ffmpeg code style > 3. from RepType to AVMediaType > 4. fix variable typo > 5. change time value from uint32_t to uint64_t > 6. removed be used once API > 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and av_timegm > 8. merge complex free operation to free_fragment > 9. use API from snprintf to av_asprintf > > v3 fixed: > 1. fix typo from --enabled-xml2 to --enable-xml2 > > v4 fixed: > 1. from --enable-xml2 to --enable-libxml2 > 2. move system includes to top > 3. remove nouse includes > 4. rename enum name > 5. add a trailing comma for the last entry enum > 6. fix comment typo > 7. add const to DASHContext class front > 8. check sscanf if return arguments and give warning message when error > 9. check validity before free seg->url and seg > 10. check if the val is null, before use atoll > > v5 fixed: > 1. fix typo from mainifest to manifest > > v6 fixed: > 1. from realloc to av_realloc > 2. from free to av_free > > Reviewed-by: Clément Bœsch <u@pkh.me> > Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> > Reviewed-by: Carl Eugen Hoyos <cehoyos@ag.or.at> > Reviewed-by: Rodger Combs <rodger.combs@gmail.com> > Reviewed-by: Moritz Barsnick <barsnick@gmx.net> > Reviewed-by: Nicolas George <george@nsup.org> > Reviewed-by: Ricardo Constantino <wiiaboo@gmail.com> > Signed-off-by: Steven Liu <lq@chinaffmpeg.org> > --- > configure | 4 + > libavformat/Makefile | 1 + > libavformat/allformats.c | 2 +- > libavformat/dashdec.c | 1841 ++++++++++++++++++++++++++++++++++++++++++++++ > 4 files changed, 1847 insertions(+), 1 deletion(-) > create mode 100644 libavformat/dashdec.c > > diff --git a/configure b/configure > index 4eb116b..86d16a8 100755 > --- a/configure > +++ b/configure > @@ -273,6 +273,7 @@ External library support: > --enable-libxcb-shape enable X11 grabbing shape rendering [autodetect] > --enable-libxvid enable Xvid encoding via xvidcore, > native MPEG-4/Xvid encoder exists [no] > + --enable-libxml2 enable XML parsing using the C library libxml2 [no] > --enable-libzimg enable z.lib, needed for zscale filter [no] > --enable-libzmq enable message passing via libzmq [no] > --enable-libzvbi enable teletext support via libzvbi [no] > @@ -1590,6 +1591,7 @@ EXTERNAL_LIBRARY_LIST=" > libvpx > libwavpack > libwebp > + libxml2 > libzimg > libzmq > libzvbi > @@ -2920,6 +2922,7 @@ avi_muxer_select="riffenc" > caf_demuxer_select="iso_media riffdec" > caf_muxer_select="iso_media" > dash_muxer_select="mp4_muxer" > +dash_demuxer_deps="libxml2" > dirac_demuxer_select="dirac_parser" > dts_demuxer_select="dca_parser" > dtshd_demuxer_select="dca_parser" > @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config openssl openssl/ssl.h OPENSSL_init > check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 || > die "ERROR: openssl not found"; } > enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable qtkit_indev; } > +enabled libxml2 && require_pkg_config libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 > > # libdc1394 check > if enabled libdc1394; then > diff --git a/libavformat/Makefile b/libavformat/Makefile > index f56ef16..d77ffaa 100644 > --- a/libavformat/Makefile > +++ b/libavformat/Makefile > @@ -134,6 +134,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o > OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o > OBJS-$(CONFIG_DATA_MUXER) += rawenc.o > OBJS-$(CONFIG_DASH_MUXER) += dashenc.o > +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o > OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o > OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o > OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o > diff --git a/libavformat/allformats.c b/libavformat/allformats.c > index 09e62c3..d57314b 100644 > --- a/libavformat/allformats.c > +++ b/libavformat/allformats.c > @@ -96,7 +96,7 @@ static void register_all(void) > REGISTER_DEMUXER (CINE, cine); > REGISTER_DEMUXER (CONCAT, concat); > REGISTER_MUXER (CRC, crc); > - REGISTER_MUXER (DASH, dash); > + REGISTER_MUXDEMUX(DASH, dash); > REGISTER_MUXDEMUX(DATA, data); > REGISTER_MUXDEMUX(DAUD, daud); > REGISTER_DEMUXER (DCSTR, dcstr); > diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c > new file mode 100644 > index 0000000..e0be85e > --- /dev/null > +++ b/libavformat/dashdec.c > @@ -0,0 +1,1841 @@ > +/* > + * Dynamic Adaptive Streaming over HTTP demux > + * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux > + * Copyright (c) 2017 Steven Liu > + * > + * This file is part of FFmpeg. > + * > + * FFmpeg is free software; you can redistribute it and/or > + * modify it under the terms of the GNU Lesser General Public > + * License as published by the Free Software Foundation; either > + * version 2.1 of the License, or (at your option) any later version. > + * > + * FFmpeg is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * Lesser General Public License for more details. > + * > + * You should have received a copy of the GNU Lesser General Public > + * License along with FFmpeg; if not, write to the Free Software > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA > + */ > +#include <libxml/parser.h> > +#include "libavutil/intreadwrite.h" > +#include "libavutil/opt.h" > +#include "libavutil/time.h" > +#include "libavutil/parseutils.h" > +#include "internal.h" > +#include "avio_internal.h" > + > +#define INITIAL_BUFFER_SIZE 32768 > + > +struct fragment { > + int64_t url_offset; > + int64_t size; > + char *url; > +}; > + > +/* > + * reference to : ISO_IEC_23009-1-DASH-2012 > + * Section: 5.3.9.6.2 > + * Table: Table 17 — Semantics of SegmentTimeline element > + * */ > +struct timeline { > + /* t: Element or Attribute Name > + * specifies the MPD start time, in @timescale units, > + * the first Segment in the series starts relative to the beginning of the Period. > + * The value of this attribute must be equal to or greater than the sum of the previous S > + * element earliest presentation time and the sum of the contiguous Segment durations. > + * If the value of the attribute is greater than what is expressed by the previous S element, > + * it expresses discontinuities in the timeline. > + * If not present then the value shall be assumed to be zero for the first S element > + * and for the subsequent S elements, the value shall be assumed to be the sum of > + * the previous S element's earliest presentation time and contiguous duration > + * (i.e. previous S@t + @d * (@r + 1)). > + * */ > + int64_t t; > + /* r: Element or Attribute Name > + * specifies the repeat count of the number of following contiguous Segments with > + * the same duration expressed by the value of @d. This value is zero-based > + * (e.g. a value of three means four Segments in the contiguous series). > + * */ > + int32_t r; > + /* d: Element or Attribute Name > + * specifies the Segment duration, in units of the value of the @timescale. > + * */ > + int64_t d; > +}; > + > +enum DASHTmplUrlType { > + TMP_URL_TYPE_UNSPECIFIED, > + TMP_URL_TYPE_NUMBER, > + TMP_URL_TYPE_TIME, > +}; > + > +/* > + * Each playlist has its own demuxer. If it is currently active, > + * it has an opened AVIOContext too, and potentially an AVPacket > + * containing the next packet from this stream. > + */ > +struct representation { > + char *url_template; > + enum DASHTmplUrlType tmp_url_type; > + AVIOContext pb; > + AVIOContext *input; > + AVFormatContext *parent; > + AVFormatContext *ctx; > + AVPacket pkt; > + int rep_idx; > + int rep_count; > + int stream_index; > + > + enum AVMediaType type; > + int64_t target_duration; > + > + int n_fragments; > + struct fragment **fragments; /* VOD list of fragment for profile */ > + > + int n_timelines; > + struct timeline **timelines; > + > + int64_t first_seq_no; > + int64_t last_seq_no; > + > + int64_t fragment_duration; > + int64_t fragment_timescale; > + > + int64_t cur_seq_no; > + int64_t cur_seg_offset; > + int64_t cur_seg_size; > + struct fragment *cur_seg; > + > + /* Currently active Media Initialization Section */ > + struct fragment *init_section; > + uint8_t *init_sec_buf; > + uint32_t init_sec_buf_size; > + uint32_t init_sec_data_len; > + uint32_t init_sec_buf_read_offset; > + int fix_multiple_stsd_order; > + int64_t cur_timestamp; > +}; > + > +typedef struct DASHContext { > + const AVClass *class; > + char *base_url; > + struct representation *cur_video; > + struct representation *cur_audio; > + uint64_t media_presentation_duration_sec; > + uint64_t suggested_presentation_delay_sec; > + uint64_t presentation_delay_sec; > + uint64_t availability_start_time_sec; > + uint64_t publish_time_sec; > + uint64_t minimum_update_period_sec; > + uint64_t time_shift_buffer_depth_sec; > + uint64_t min_buffer_time_sec; > + uint64_t period_duration_sec; > + uint64_t period_start_sec; > + int is_live; > + int audio_rep_index; > + int video_rep_index; > + AVIOInterruptCB *interrupt_callback; > + char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context > + char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context > + char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context > + AVDictionary *avio_opts; > +} DASHContext; > + > +static uint64_t GetCurrentTimeInSec(void) > +{ > + return av_gettime() / 1000000; > +} > + > +static uint64_t GetUTCDateTimeInSec(AVFormatContext *s, const char *datetime) > +{ > + struct tm timeinfo; > + int year = 0; > + int month = 0; > + int day = 0; > + int hour = 0; > + int minute = 0; > + int ret = 0; > + float second = 0.0; > + > + /* ISO-8601 date parser */ > + if (!datetime) > + return 0; > + > + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second); > + /* year, month, day, hour, minute, second 6 arguments */ > + if (ret != 6) { > + av_log(s, AV_LOG_WARNING, "GetUTCDateTimeInSec get a wrong time format\n"); > + // return 0; /* parser error */ > + } > + timeinfo.tm_year = year - 1900; > + timeinfo.tm_mon = month - 1; > + timeinfo.tm_mday = day; > + timeinfo.tm_hour = hour; > + timeinfo.tm_min = minute; > + timeinfo.tm_sec = (int)second; > + > + return av_timegm(&timeinfo); > +} > + > +static uint32_t GetDurationInSec(AVFormatContext *s, const char *duration) > +{ > + /* ISO-8601 duration parser */ > + uint32_t days = 0; > + uint32_t hours = 0; > + uint32_t mins = 0; > + uint32_t secs = 0; > + uint32_t size = 0; > + float value = 0; > + uint8_t type = 0; > + const char *ptr = duration; > + > + while (*ptr) { > + if (*ptr == 'P' || *ptr == 'T') { > + ptr++; > + continue; > + } > + > + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) { > + av_log(s, AV_LOG_WARNING, "GetDurationInSec get a wrong time format\n"); > + return 0; /* parser error */ > + } > + switch (type) { > + case 'D': > + days = (uint32_t)value; > + break; > + case 'H': > + hours = (uint32_t)value; > + break; > + case 'M': > + mins = (uint32_t)value; > + break; > + case 'S': > + secs = (uint32_t)value; > + break; > + default: > + // handle invalid type > + break; > + } > + ptr += size; > + } > + return ((days * 24 + hours) * 60 + mins) * 60 + secs; > +} > + > +static void free_fragment(struct fragment **seg) > +{ > + if (!(*seg)) { > + return; > + } > + av_freep(&(*seg)->url); > + av_freep(seg); > +} > + > +static void free_fragment_list(struct representation *pls) > +{ > + int i; > + > + for (i = 0; i < pls->n_fragments; i++) { > + free_fragment(&pls->fragments[i]); > + } > + av_freep(&pls->fragments); > + pls->n_fragments = 0; > +} > + > +static void free_timelines_list(struct representation *pls) > +{ > + int i; > + > + for (i = 0; i < pls->n_timelines; i++) { > + av_freep(&pls->timelines[i]); > + } > + av_freep(&pls->timelines); > + pls->n_timelines = 0; > +} > + > +/* > + * Used to reset a statically allocated AVPacket to a clean slate, > + * containing no data. > + */ > +static void reset_packet(AVPacket *pkt) > +{ > + av_init_packet(pkt); > + pkt->data = NULL; > +} > + > +static void free_representation(struct representation *pls) > +{ > + free_fragment_list(pls); > + free_timelines_list(pls); > + free_fragment(&pls->cur_seg); > + free_fragment(&pls->init_section); > + av_freep(&pls->init_sec_buf); > + av_packet_unref(&pls->pkt); > + reset_packet(&pls->pkt); > + av_freep(&pls->pb.buffer); > + if (pls->input) > + ff_format_io_close(pls->parent, &pls->input); > + if (pls->ctx) { > + pls->ctx->pb = NULL; > + avformat_close_input(&pls->ctx); > + } > + > + av_free(pls->url_template); > + av_free(pls); > +} > + > +static void update_options(char **dest, const char *name, void *src) > +{ > + av_freep(dest); > + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest); > + if (*dest) > + av_freep(dest); > +} > + > +static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, > + AVDictionary *opts, AVDictionary *opts2, int *is_http) > +{ > + DASHContext *c = s->priv_data; > + AVDictionary *tmp = NULL; > + const char *proto_name = NULL; > + int ret; > + > + av_dict_copy(&tmp, opts, 0); > + av_dict_copy(&tmp, opts2, 0); > + > + if (av_strstart(url, "crypto", NULL)) { > + if (url[6] == '+' || url[6] == ':') > + proto_name = avio_find_protocol_name(url + 7); > + } > + > + if (!proto_name) > + proto_name = avio_find_protocol_name(url); > + > + if (!proto_name) > + return AVERROR_INVALIDDATA; > + > + // only http(s) & file are allowed > + if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL)) > + return AVERROR_INVALIDDATA; > + if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':') > + ; > + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') > + ; > + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) > + return AVERROR_INVALIDDATA; > + > + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp); > + if (ret >= 0) { > + // update cookies on http response with setcookies. > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > + update_options(&c->cookies, "cookies", u); > + av_dict_set(&opts, "cookies", c->cookies, 0); > + } > + > + av_dict_free(&tmp); > + > + if (is_http) > + *is_http = av_strstart(proto_name, "http", NULL); > + > + return ret; > + > +} > + > +static char *strreplace(const char *str, const char *from, const char *to) > +{ > + /* Adjust each of the below values to suit your needs. */ > + /* Increment positions cache size initially by this number. */ > + size_t cache_sz_inc = 16; > + /* Thereafter, each time capacity needs to be increased, > + * multiply the increment by this factor. */ > + const size_t cache_sz_inc_factor = 3; > + /* But never increment capacity by more than this number. */ > + const size_t cache_sz_inc_max = 1048576; > + > + char *pret, *ret = NULL; > + const char *pstr2, *pstr = str; > + size_t i, count = 0; > + uintptr_t *pos_cache_tmp, *pos_cache = NULL; > + size_t cache_sz = 0; > + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from); > + > + /* Find all matches and cache their positions. */ > + while ((pstr2 = av_stristr(pstr, from))) { > + count++; > + /* Increase the cache size when necessary. */ > + if (cache_sz < count) { > + cache_sz += cache_sz_inc; > + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) * cache_sz); > + if (!pos_cache_tmp) { > + goto end_strreplace; > + } else pos_cache = pos_cache_tmp; > + cache_sz_inc *= cache_sz_inc_factor; > + if (cache_sz_inc > cache_sz_inc_max) { > + cache_sz_inc = cache_sz_inc_max; > + } > + } > + > + pos_cache[count-1] = pstr2 - str; > + pstr = pstr2 + fromlen; > + } > + orglen = pstr - str + strlen(pstr); > + /* Allocate memory for the post-replacement string. */ > + if (count > 0) { > + tolen = strlen(to); > + retlen = orglen + (tolen - fromlen) * count; > + } else { > + retlen = orglen; > + } > + ret = av_malloc(retlen + 1); > + if (!ret) { > + goto end_strreplace; > + } > + > + if (!count) { > + /* If no matches, then just duplicate the string. */ > + av_strlcpy(ret, str, retlen + 1); > + } else { > + /* Otherwise, duplicate the string whilst performing > + * the replacements using the position cache. */ > + pret = ret; > + memcpy(pret, str, pos_cache[0]); > + pret += pos_cache[0]; > + for (i = 0; i < count; i++) { > + memcpy(pret, to, tolen); > + pret += tolen; > + pstr = str + pos_cache[i] + fromlen; > + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) - pos_cache[i] - fromlen; > + memcpy(pret, pstr, cpylen); > + pret += cpylen; > + } > + ret[retlen] = '\0'; > + } > + > +end_strreplace: > + /* Free the cache and return the post-replacement string, > + * which will be NULL in the event of an error. */ > + av_free(pos_cache); > + return ret; > +} > + > +static char *replace_template_str(const char *url, const char *marker) > +{ > + char *prefix = NULL; > + char *start = 0; > + char *end = NULL; > + char *tmp_url = NULL; > + char *new_url = NULL; > + int marker_len; > + > + prefix = av_strdup(marker); > + marker_len = strlen(prefix) - 1; > + prefix[marker_len] = '\0'; > + > + start = av_stristr(url, prefix); > + if (!start) > + goto finish; > + end = strchr(start + 1, '$'); > + if (!end) > + goto finish; > + > + if (start[marker_len] != '%') > + goto finish; > + > + if (end[-1] != 'd') > + goto finish; > + > + tmp_url = av_mallocz(MAX_URL_SIZE); > + if (!tmp_url) { > + return NULL; > + } > + > + av_strlcpy(tmp_url, url, start - url+ 1); > + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end - start - marker_len); > + av_strlcat(tmp_url, PRId64, MAX_URL_SIZE); > + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE); > + > +finish: > + av_free(prefix); > + new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64); > + av_free(tmp_url); > + return new_url; > +} > + > +static char *get_content_url(xmlNodePtr *baseurl_nodes, int n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar *val) > +{ > + int i; > + xmlChar *text; > + char *url = NULL; > + char *tmp_str = av_mallocz(MAX_URL_SIZE); > + char *tmp_str_2 = NULL; > + > + if (!tmp_str) { > + return NULL; > + } > + for (i = 0; i < n_baseurl_nodes; ++i) { > + if (baseurl_nodes[i] && baseurl_nodes[i]->children && baseurl_nodes[i]->children->type == XML_TEXT_NODE) { > + text = xmlNodeGetContent(baseurl_nodes[i]->children); > + if (text) { > + tmp_str_2 = av_mallocz(MAX_URL_SIZE); > + if (!tmp_str_2) { > + av_free(tmp_str); > + return NULL; > + } > + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text); > + av_free(tmp_str); > + tmp_str = tmp_str_2; > + xmlFree(text); > + } > + } > + } > + if (val) > + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE); > + if (rep_id_val) { > + url = strreplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val); > + av_free(tmp_str); > + tmp_str = url; > + } > + if (rep_bandwidth_val && tmp_str) > + url = strreplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val); > + if (tmp_str != url) > + av_free(tmp_str); > + return url; > +} > + > +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const xmlChar *attrname) > +{ > + int i; > + xmlChar *val; > + > + for (i = 0; i < n_nodes; ++i) { > + if (nodes[i]) { > + val = xmlGetProp(nodes[i], attrname); > + if (val) > + return val; > + } > + } > + > + return NULL; > +} > + > +static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const xmlChar *nodename) > +{ > + xmlNodePtr node = rootnode; > + if (!node) { > + return NULL; > + } > + > + node = xmlFirstElementChild(node); > + while (node) { > + if (!xmlStrcmp(node->name, nodename)) { > + return node; > + } > + node = xmlNextElementSibling(node); > + } > + return NULL; > +} > + > +static enum AVMediaType get_content_type(xmlNodePtr node) > +{ > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > + int i = 0; > + const char *attr; > + > + if (node) { > + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) { > + attr = (i) ? "mimeType" : "contentType"; > + xmlChar *val = xmlGetProp(node, attr); > + if (val) { > + if (av_stristr((const char *)val, "video")) { > + type = AVMEDIA_TYPE_VIDEO; > + } else if (av_stristr((const char *)val, "audio")) { > + type = AVMEDIA_TYPE_AUDIO; > + } > + xmlFree(val); > + } > + i++; > + } > + } > + return type; > +} > + > +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep, > + xmlNodePtr fragmenturl_node, > + xmlNodePtr *baseurl_nodes, > + xmlChar *rep_id_val, > + xmlChar *rep_bandwidth_val) > +{ > + xmlChar *initialization_val = NULL; > + xmlChar *media_val = NULL; > + > + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"Initialization")) { > + initialization_val = xmlGetProp(fragmenturl_node, "sourceURL"); > + if (initialization_val) { > + rep->init_section = av_mallocz(sizeof(struct fragment)); > + if (!rep->init_section) { > + xmlFree(initialization_val); > + return AVERROR(ENOMEM); > + } > + rep->init_section->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, initialization_val); > + rep->init_section->size = -1; > + xmlFree(initialization_val); > + } > + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"SegmentURL")) { > + media_val = xmlGetProp(fragmenturl_node, "media"); > + if (media_val) { > + struct fragment *seg = av_mallocz(sizeof(struct fragment)); > + if (!seg) { > + xmlFree(media_val); > + return AVERROR(ENOMEM); > + } > + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val); > + seg->size = -1; > + dynarray_add(&rep->fragments, &rep->n_fragments, seg); > + xmlFree(media_val); > + } > + } > + > + return 0; > +} > + > +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep, > + xmlNodePtr fragment_timeline_node) > +{ > + xmlAttrPtr attr = NULL; > + xmlChar *val = NULL; > + > + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar *)"S")) { > + struct timeline *tml = av_mallocz(sizeof(struct timeline)); > + if (!tml) { > + return AVERROR(ENOMEM); > + } > + attr = fragment_timeline_node->properties; > + while (attr) { > + val = xmlGetProp(fragment_timeline_node, attr->name); > + > + if (!val) { > + av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name); > + continue; > + } > + > + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) { > + tml->t = (int64_t)atoll((const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) { > + tml->r =(int32_t) atoi((const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) { > + tml->d = (int64_t)atoll((const char *)val); > + rep->fragment_duration = (int64_t) atoll((const char *)val); > + } > + attr = attr->next; > + xmlFree(val); > + } > + dynarray_add(&rep->timelines, &rep->n_timelines, tml); > + } > + > + return 0; > +} > + > +static int parse_manifest_representation(AVFormatContext *s, const char *url, > + xmlNodePtr node, > + xmlNodePtr adaptionset_node, > + xmlNodePtr mpd_baseurl_node, > + xmlNodePtr period_baseurl_node, > + xmlNodePtr fragment_template_node, > + xmlNodePtr content_component_node, > + xmlNodePtr adaptionset_baseurl_node) > +{ > + int32_t ret = 0; > + int32_t audio_rep_idx = 0; > + int32_t video_rep_idx = 0; > + char *temp_string = NULL; > + DASHContext *c = s->priv_data; > + struct representation *rep = NULL; > + struct fragment *seg = NULL; > + xmlNodePtr representation_segmenttemplate_node = NULL; > + xmlNodePtr representation_baseurl_node = NULL; > + xmlNodePtr representation_segmentlist_node = NULL; > + xmlNodePtr fragment_timeline_node = NULL; > + xmlNodePtr fragment_templates_tab[2]; > + xmlChar *duration_val = NULL; > + xmlChar *startnumber_val = NULL; > + xmlChar *timescale_val = NULL; > + xmlChar *initialization_val = NULL; > + xmlChar *media_val = NULL; > + xmlNodePtr baseurl_nodes[4]; > + xmlNodePtr representation_node = node; > + xmlChar *rep_id_val = xmlGetProp(representation_node, "id"); > + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth"); > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > + > + // try get information from representation > + if (type == AVMEDIA_TYPE_UNKNOWN) > + type = get_content_type(representation_node); > + // try get information from contentComponen > + if (type == AVMEDIA_TYPE_UNKNOWN) > + type = get_content_type(content_component_node); > + // try get information from adaption set > + if (type == AVMEDIA_TYPE_UNKNOWN) > + type = get_content_type(adaptionset_node); > + if (type == AVMEDIA_TYPE_UNKNOWN) { > + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url); > + } else if ((type == AVMEDIA_TYPE_VIDEO && ((c->video_rep_index < 0 && !c->cur_video) || > + video_rep_idx == (int32_t)c->video_rep_index )) || > + (type == AVMEDIA_TYPE_AUDIO && ((c->audio_rep_index < 0 && !c->cur_audio) || > + audio_rep_idx == (int32_t)c->audio_rep_index ))) { > + // convert selected representation to our internal struct > + rep = av_mallocz(sizeof(struct representation)); > + if (!rep) { > + ret = AVERROR(ENOMEM); > + goto end; > + } > + representation_segmenttemplate_node = findChildNodeByName(representation_node, "SegmentTemplate"); > + representation_baseurl_node = findChildNodeByName(representation_node, "BaseURL"); > + representation_segmentlist_node = findChildNodeByName(representation_node, "SegmentList"); > + reset_packet(&rep->pkt); > + > + baseurl_nodes[0] = mpd_baseurl_node; > + baseurl_nodes[1] = period_baseurl_node; > + baseurl_nodes[2] = adaptionset_baseurl_node; > + baseurl_nodes[3] = representation_baseurl_node; > + > + if (representation_segmenttemplate_node || fragment_template_node) { > + fragment_timeline_node = NULL; > + fragment_templates_tab[0] = representation_segmenttemplate_node; > + fragment_templates_tab[1] = fragment_template_node; > + > + duration_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "duration"); > + startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "startNumber"); > + timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "timescale"); > + initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "initialization"); > + media_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "media"); > + > + if (initialization_val) { > + rep->init_section = av_mallocz(sizeof(struct fragment)); > + if (!rep->init_section) { > + av_free(rep); > + ret = AVERROR(ENOMEM); > + goto end; > + } > + rep->init_section->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, initialization_val); > + rep->init_section->size = -1; > + xmlFree(initialization_val); > + } > + > + if (media_val) { > + temp_string = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val); > + if (temp_string) { > + if (av_stristr(temp_string, "$Number")) { > + rep->url_template = replace_template_str(temp_string, "$Number$"); > + /* A URL template is provided from which clients build a chunk list > + * where the chunk URLs include chunk numbers (like index numbers). > + */ > + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* Number-Based. */ > + } else if (av_stristr(temp_string, "$Time")) { > + rep->url_template = replace_template_str(temp_string, "$Time$"); > + /* A URL template is provided from which clients build a chunk list > + * where the chunk URLs include chunk start times. > + */ > + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* Time-Based. */ > + } else { > + rep->url_template = temp_string; > + temp_string = NULL; > + } > + av_free(temp_string); > + } > + xmlFree(media_val); > + } > + if (duration_val) { > + rep->fragment_duration = (int64_t) atoll((const char *)duration_val); > + xmlFree(duration_val); > + } > + if (timescale_val) { > + rep->fragment_timescale = (int64_t) atoll((const char *)timescale_val); > + xmlFree(timescale_val); > + } > + if (startnumber_val) { > + rep->first_seq_no = (int64_t) atoll((const char *)startnumber_val); > + xmlFree(startnumber_val); > + } > + > + fragment_timeline_node = findChildNodeByName(representation_segmenttemplate_node, "SegmentTimeline"); > + > + if (!fragment_timeline_node) > + fragment_timeline_node = findChildNodeByName(fragment_template_node, "SegmentTimeline"); > + if (fragment_timeline_node) { > + fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node); > + while (fragment_timeline_node) { > + ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node); > + if (ret < 0) { > + return ret; > + } > + fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node); > + } > + } > + } else if (representation_baseurl_node && !representation_segmentlist_node) { > + seg = av_mallocz(sizeof(struct fragment)); > + if (!seg) { > + ret = AVERROR(ENOMEM); > + goto end; > + } > + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, NULL); > + seg->size = -1; > + dynarray_add(&rep->fragments, &rep->n_fragments, seg); > + } else if (!representation_baseurl_node && representation_segmentlist_node) { > + // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html > + // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full > + xmlNodePtr fragmenturl_node = NULL; > + duration_val = xmlGetProp(representation_segmentlist_node, "duration"); > + timescale_val = xmlGetProp(representation_segmentlist_node, "timescale"); > + if (duration_val) { > + rep->fragment_duration = (int64_t) atoll((const char *)duration_val); > + xmlFree(duration_val); > + } > + if (timescale_val) { > + rep->fragment_timescale = (int64_t) atoll((const char *)timescale_val); > + xmlFree(timescale_val); > + } > + fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node); > + while (fragmenturl_node) { > + ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val); > + if (ret < 0) { > + return ret; > + } > + fragmenturl_node = xmlNextElementSibling(fragmenturl_node); > + } > + } else { > + free_representation(rep); > + rep = NULL; > + av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val); > + } > + > + if (rep) { > + if (rep->fragment_duration > 0 && !rep->fragment_timescale) > + rep->fragment_timescale = 1; > + if (type == AVMEDIA_TYPE_VIDEO) { > + rep->rep_idx = video_rep_idx; > + c->cur_video = rep; > + } else { > + rep->rep_idx = audio_rep_idx; > + c->cur_audio = rep; > + } > + } > + } > + > + video_rep_idx += type == AVMEDIA_TYPE_VIDEO; > + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO; > + > +end: > + if (rep_id_val) > + xmlFree(rep_id_val); > + if (rep_bandwidth_val) > + xmlFree(rep_bandwidth_val); > + > + return ret; > +} > + > +static int parse_manifest_adaptationset(AVFormatContext *s, const char *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node) > +{ > + int ret = 0; > + xmlNodePtr fragment_template_node = NULL; > + xmlNodePtr content_component_node = NULL; > + xmlNodePtr adaptionset_baseurl_node = NULL; > + xmlNodePtr node = NULL; > + > + node = xmlFirstElementChild(adaptionset_node); > + while (node) { > + if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) { > + fragment_template_node = node; > + } else if (!xmlStrcmp(node->name, (const xmlChar *)"ContentComponent")) { > + content_component_node = node; > + } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) { > + adaptionset_baseurl_node = node; > + } else if (!xmlStrcmp(node->name, (const xmlChar *)"Representation")) { > + ret = parse_manifest_representation(s, url, node, > + adaptionset_node, > + mpd_baseurl_node, > + period_baseurl_node, > + fragment_template_node, > + content_component_node, > + adaptionset_baseurl_node); > + if (ret < 0) { > + return ret; > + } > + } > + node = xmlNextElementSibling(node); > + } > + return 0; > +} > + > + > +static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in) > +{ > + DASHContext *c = s->priv_data; > + int ret = 0; > + int close_in = 0; > + uint8_t *new_url = NULL; > + int64_t filesize = 0; > + char *buffer = NULL; > + AVDictionary *opts = NULL; > + xmlDoc *doc = NULL; > + xmlNodePtr root_element = NULL; > + xmlNodePtr node = NULL; > + xmlNodePtr period_node = NULL; > + xmlNodePtr mpd_baseurl_node = NULL; > + xmlNodePtr period_baseurl_node = NULL; > + xmlNodePtr adaptionset_node = NULL; > + xmlAttrPtr attr = NULL; > + xmlChar *val = NULL; > + uint32_t perdiod_duration_sec = 0; > + uint32_t perdiod_start_sec = 0; > + int32_t audio_rep_idx = 0; > + int32_t video_rep_idx = 0; > + > + if (!in) { > + close_in = 1; > + /* This is XML manifest there is no need to set range header */ > + av_dict_set(&opts, "seekable", "0", 0); > + // broker prior HTTP options that should be consistent across requests > + av_dict_set(&opts, "user-agent", c->user_agent, 0); > + av_dict_set(&opts, "cookies", c->cookies, 0); > + av_dict_set(&opts, "headers", c->headers, 0); > + > + ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts); > + av_dict_free(&opts); > + if (ret < 0) > + return ret; > + } > + > + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) { > + c->base_url = av_strdup(new_url); > + } else { > + c->base_url = av_strdup(url); > + } > + > + filesize = avio_size(in); > + if (filesize <= 0){ > + filesize = 8 * 1024; > + } > + > + buffer = av_mallocz(filesize); > + if (!buffer) { > + return AVERROR(ENOMEM); > + } > + > + filesize = avio_read(in, buffer, filesize); > + if (filesize > 0) { > + LIBXML_TEST_VERSION > + > + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0); > + root_element = xmlDocGetRootElement(doc); > + node = root_element; > + > + if (!node) { > + ret = AVERROR_INVALIDDATA; > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url); > + goto cleanup; > + } > + > + if (node->type != XML_ELEMENT_NODE || > + xmlStrcmp(node->name, (const xmlChar *)"MPD")) { > + ret = AVERROR_INVALIDDATA; > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type); > + goto cleanup; > + } > + > + val = xmlGetProp(node, "type"); > + if (!val) { > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url); > + ret = AVERROR_INVALIDDATA; > + goto cleanup; > + } > + if (!xmlStrcmp(val, (const xmlChar *)"dynamic")) > + c->is_live = 1; > + xmlFree(val); > + > + attr = node->properties; > + while (attr) { > + val = xmlGetProp(node, attr->name); > + > + if (!xmlStrcmp(attr->name, (const xmlChar *)"availabilityStartTime")) { > + c->availability_start_time_sec = GetUTCDateTimeInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"publishTime")) { > + c->publish_time_sec = GetUTCDateTimeInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minimumUpdatePeriod")) { > + c->minimum_update_period_sec = GetDurationInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"timeShiftBufferDepth")) { > + c->time_shift_buffer_depth_sec = GetDurationInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minBufferTime")) { > + c->min_buffer_time_sec = GetDurationInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"suggestedPresentationDelay")) { > + c->suggested_presentation_delay_sec = GetDurationInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"mediaPresentationDuration")) { > + c->media_presentation_duration_sec = GetDurationInSec(s, (const char *)val); > + } > + attr = attr->next; > + xmlFree(val); > + } > + > + mpd_baseurl_node = findChildNodeByName(node, "BaseURL"); > + > + // at now we can handle only one period, with the longest duration > + node = xmlFirstElementChild(node); > + while (node) { > + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) { > + perdiod_duration_sec = 0; > + perdiod_start_sec = 0; > + attr = node->properties; > + while (attr) { > + val = xmlGetProp(node, attr->name); > + if (!xmlStrcmp(attr->name, (const xmlChar *)"duration")) { > + perdiod_duration_sec = GetDurationInSec(s, (const char *)val); > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"start")) { > + perdiod_start_sec = GetDurationInSec(s, (const char *)val); > + } > + attr = attr->next; > + xmlFree(val); > + } > + if ((perdiod_duration_sec) >= (c->period_duration_sec)) { > + period_node = node; > + c->period_duration_sec = perdiod_duration_sec; > + c->period_start_sec = perdiod_start_sec; > + if (c->period_start_sec > 0) > + c->media_presentation_duration_sec = c->period_duration_sec; > + } > + } > + node = xmlNextElementSibling(node); > + } > + if (!period_node) { > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url); > + ret = AVERROR_INVALIDDATA; > + goto cleanup; > + } > + // explore AdaptationSet > + adaptionset_node = xmlFirstElementChild(period_node); > + while (adaptionset_node) { > + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"BaseURL")) { > + period_baseurl_node = adaptionset_node; > + } else if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"AdaptationSet")) { > + parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node); > + } > + adaptionset_node = xmlNextElementSibling(adaptionset_node); > + } > + if (c->cur_video) { > + c->cur_video->rep_count = video_rep_idx; > + c->cur_video->fix_multiple_stsd_order = 1; > + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", (int)c->cur_video->rep_idx); > + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", (int)video_rep_idx); > + } > + if (c->cur_audio) { > + c->cur_audio->rep_count = audio_rep_idx; > + } > + > +cleanup: > + /*free the document */ > + xmlFreeDoc(doc); > + xmlCleanupParser(); > + } else { > + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url); > + ret = AVERROR_INVALIDDATA; > + } > + > + av_free(new_url); > + av_free(buffer); > + if (close_in) { > + avio_close(in); > + } > + return ret; > +} > + > +static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls) > +{ > + DASHContext *c = pls->parent->priv_data; > + int64_t num = 0; > + > + if (c->is_live) { > + if (!pls->fragment_duration) { > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration value in live mode\n"); > + return pls->first_seq_no; > + } > + num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availability_start_time_sec) - c->presentation_delay_sec) * pls->fragment_timescale) / pls->fragment_duration; > + } else { > + num = pls->first_seq_no; > + } > + return num; > +} > + > +static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls) > +{ > + DASHContext *c = pls->parent->priv_data; > + int64_t num = 0; > + > + if (c->is_live) { > + if (!pls->fragment_duration) { > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration value in live mode\n"); > + return pls->first_seq_no; > + } > + num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) * pls->fragment_timescale) / pls->fragment_duration; > + } else { > + num = pls->first_seq_no; > + } > + return num; > +} > + > +static int64_t calc_max_seg_no(AVFormatContext *s, struct representation *pls) > +{ > + DASHContext *c = pls->parent->priv_data; > + int64_t num = 0; > + int64_t i = 0; > + > + if (c->is_live) { > + if (!pls->fragment_duration) { > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration value in live mode\n"); > + return pls->first_seq_no; > + } > + num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availability_start_time_sec)) * pls->fragment_timescale) / pls->fragment_duration; > + } else { > + if (pls->n_fragments) { > + num = pls->first_seq_no + pls->n_fragments - 1; > + } else if (pls->n_timelines) { > + num = pls->first_seq_no + pls->n_timelines - 1; > + for (i = 0; i < pls->n_timelines; ++i) { > + num += pls->timelines[i]->r; > + } > + } else { > + num = pls->first_seq_no + (c->media_presentation_duration_sec * pls->fragment_timescale) / pls->fragment_duration; > + } > + } > + > + return num; > +} > + > +static int64_t get_fragment_start_time(struct representation *pls, int64_t cur_seq_no) > +{ > + int64_t i = 0; > + int64_t j = 0; > + int64_t num = 0; > + int64_t startTime = 0; > + > + if (pls->n_timelines) { > + for (i = 0; i < pls->n_timelines; ++i) { > + if (pls->timelines[i]->t > 0) { > + startTime = pls->timelines[i]->t; > + } > + if (num == cur_seq_no) > + goto finish; > + startTime += pls->timelines[i]->d; > + for (j = 0; j < pls->timelines[i]->r; ++j) { > + num++; > + if (num == cur_seq_no) > + goto finish; > + startTime += pls->timelines[i]->d; > + } > + num++; > + } > + } > + > +finish: > + return startTime; > +} > + > +static struct fragment *get_current_fragment(struct representation *pls) > +{ > + int64_t min_seq_no = 0; > + int64_t max_seq_no = 0; > + char *tmp_str = NULL; > + struct fragment *seg = NULL; > + struct fragment *seg_ptr = NULL; > + DASHContext *c = pls->parent->priv_data; > + > + if (pls->n_fragments > 0) { > + if (pls->cur_seq_no < pls->n_fragments) { > + seg_ptr = pls->fragments[pls->cur_seq_no]; > + seg = av_mallocz(sizeof(struct fragment)); > + if (!seg) { > + return NULL; > + } > + seg->url = av_strdup(seg_ptr->url); > + if (!seg->url) { > + av_free(seg); > + return NULL; > + } > + seg->size = seg_ptr->size; > + seg->url_offset = seg_ptr->url_offset; > + return seg; > + } > + } > + if (c->is_live) { > + while (1) { > + min_seq_no = calc_min_seg_no(pls->parent, pls); > + max_seq_no = calc_max_seg_no(pls->parent, pls); > + > + if (pls->cur_seq_no <= min_seq_no) { > + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", > + (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx); > + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls); > + } else if (pls->cur_seq_no > max_seq_no) { > + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", > + min_seq_no, max_seq_no, (int)pls->rep_idx); > + av_usleep(1000); > + continue; > + } > + break; > + } > + seg = av_mallocz(sizeof(struct fragment)); > + if (!seg) { > + return NULL; > + } > + } else if (pls->cur_seq_no <= pls->last_seq_no) { > + seg = av_mallocz(sizeof(struct fragment)); > + if (!seg) { > + return NULL; > + } > + } > + if (seg) { > + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) { > + int64_t tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no); > + tmp_str = av_asprintf(pls->url_template, (int64_t)tmp_val); Still no. Do not use ANY printf-family function with any user input as the format-string argument. Also, the cast here doesn't make sense. > + seg->url = av_strdup(tmp_str); > + if (!seg->url) { > + av_free(tmp_str); > + return NULL; > + } > + } else { > + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to resolve template url '%s'\n", pls->url_template); > + seg->url = av_strdup(pls->url_template); > + if (!seg->url) { > + return NULL; > + } > + } > + seg->size = -1; > + } > + > + av_free(tmp_str); > + return seg; > +} > + > +enum ReadFromURLMode { > + READ_NORMAL, > + READ_COMPLETE, > +}; > + > +static int read_from_url(struct representation *pls, struct fragment *seg, > + uint8_t *buf, int buf_size, > + enum ReadFromURLMode mode) > +{ > + int ret; > + > + /* limit read if the fragment was only a part of a file */ > + if (seg->size >= 0) > + buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset); > + > + if (mode == READ_COMPLETE) { > + ret = avio_read(pls->input, buf, buf_size); > + if (ret < buf_size) { > + av_log(pls->parent, AV_LOG_WARNING, "Could not read complete fragment.\n"); > + } > + } else { > + ret = avio_read(pls->input, buf, buf_size); > + } > + if (ret > 0) > + pls->cur_seg_offset += ret; > + > + return ret; > +} > + > +static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg) > +{ > + AVDictionary *opts = NULL; > + char url[MAX_URL_SIZE]; > + int ret; > + > + // broker prior HTTP options that should be consistent across requests > + av_dict_set(&opts, "user-agent", c->user_agent, 0); > + av_dict_set(&opts, "cookies", c->cookies, 0); > + av_dict_set(&opts, "headers", c->headers, 0); > + if (c->is_live) { > + av_dict_set(&opts, "seekable", "0", 0); > + } > + > + if (seg->size >= 0) { > + /* try to restrict the HTTP request to the part we want > + * (if this is in fact a HTTP request) */ > + av_dict_set_int(&opts, "offset", seg->url_offset, 0); > + av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0); > + } > + > + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url); > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n", > + url, seg->url_offset, pls->rep_idx); > + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL); > + if (ret < 0) { > + goto cleanup; > + } > + > + /* Seek to the requested position. If this was a HTTP request, the offset > + * should already be where want it to, but this allows e.g. local testing > + * without a HTTP server. */ > + if (!ret && seg->url_offset) { > + int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET); > + if (seekret < 0) { > + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url); > + ret = (int) seekret; > + ff_format_io_close(pls->parent, &pls->input); > + } > + } > + > +cleanup: > + av_dict_free(&opts); > + pls->cur_seg_offset = 0; > + pls->cur_seg_size = seg->size; > + return ret; > +} > + > +static int update_init_section(struct representation *pls) > +{ > + static const int max_init_section_size = 1024*1024; > + DASHContext *c = pls->parent->priv_data; > + int64_t sec_size = 0; > + int64_t urlsize = 0; > + int ret = 0; > + > + /* read init section only once per representation */ > + if (!pls->init_section || pls->init_sec_buf) { > + return 0; > + } > + > + ret = open_input(c, pls, pls->init_section); > + if (ret < 0) { > + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an initialization section in playlist %d\n", pls->rep_idx); > + return ret; > + } > + > + if (pls->init_section->size >= 0) { > + sec_size = pls->init_section->size; > + } else if ((urlsize = avio_size(pls->input)) >= 0) { > + sec_size = urlsize; > + } else { > + sec_size = max_init_section_size; > + } > + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization section of size %"PRId64"\n", sec_size); > + sec_size = FFMIN(sec_size, max_init_section_size); > + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size); > + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, pls->init_sec_buf_size, READ_COMPLETE); > + ff_format_io_close(pls->parent, &pls->input); > + if (ret < 0) > + return ret; > + > + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) { > + uint8_t **stsd_entries = NULL; > + int *stsd_entries_size = NULL; > + int i = 4; > + > + while (i <= (ret - 4)) { > + // find start stsd atom > + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) { > + /* 1B version > + * 3B flags > + * 4B num of entries */ > + int stsd_first_offset = i + 8; > + int stsd_offset = 0; > + int j = 0; > + uint32_t stsd_count = AV_RB32(pls->init_sec_buf + stsd_first_offset); > + stsd_first_offset += 4; > + if (stsd_count != pls->rep_count) { > + i++; > + continue; > + } > + // find all stsd entries > + stsd_entries = av_mallocz_array(stsd_count, sizeof(*stsd_entries)); > + stsd_entries_size = av_mallocz_array(stsd_count, sizeof(*stsd_entries_size)); > + for (j = 0; j < stsd_count; ++j) { > + /* 4B - size > + * 4B - format */ > + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + stsd_first_offset + stsd_offset); > + stsd_entries[j] = av_malloc(stsd_entries_size[j]); > + memcpy(stsd_entries[j], pls->init_sec_buf + stsd_first_offset + stsd_offset, stsd_entries_size[j]); > + stsd_offset += stsd_entries_size[j]; > + } > + // reorder stsd entries > + // as first put stsd entry for current representation > + j = pls->rep_idx; > + stsd_offset = stsd_first_offset; > + memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]); > + stsd_offset += stsd_entries_size[j]; > + for (j = 0; j < stsd_count; ++j) { > + if (j != pls->rep_idx) { > + memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]); > + stsd_offset += stsd_entries_size[j]; > + } > + av_free(stsd_entries[j]); > + } > + av_freep(&stsd_entries); > + av_freep(&stsd_entries_size); > + break; > + } > + i++; > + } > + } > + > + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section size[%d]\n", pls, (int)ret); > + pls->init_sec_data_len = ret; > + pls->init_sec_buf_read_offset = 0; > + > + return 0; > +} > + > +static int64_t seek_data(void *opaque, int64_t offset, int whence) > +{ > + struct representation *v = opaque; > + if (v->n_fragments && !v->init_sec_data_len) { > + return avio_seek(v->input, offset, whence); > + } > + > + return AVERROR(ENOSYS); > +} > + > +static int read_data(void *opaque, uint8_t *buf, int buf_size) > +{ > + int ret = 0; > + struct representation *v = opaque; > + DASHContext *c = v->parent->priv_data; > + > +restart: > + if (!v->input) { > + free_fragment(&v->cur_seg); > + v->cur_seg = get_current_fragment(v); > + if (!v->cur_seg) { > + ret = AVERROR_EOF; > + goto end; > + } > + > + /* load/update Media Initialization Section, if any */ > + ret = update_init_section(v); > + if (ret) > + goto end; > + > + ret = open_input(c, v, v->cur_seg); > + if (ret < 0) { > + if (ff_check_interrupt(c->interrupt_callback)) { > + goto end; > + ret = AVERROR_EXIT; > + } > + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx); > + v->cur_seq_no++; > + goto restart; > + } > + } > + > + if (v->init_sec_buf_read_offset < v->init_sec_data_len) { > + /* Push init section out first before first actual fragment */ > + int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size); > + memcpy(buf, v->init_sec_buf, copy_size); > + v->init_sec_buf_read_offset += copy_size; > + ret = copy_size; > + goto end; > + } > + > + /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/ > + if (!v->cur_seg) { > + v->cur_seg = get_current_fragment(v); > + } > + if (!v->cur_seg) { > + ret = AVERROR_EOF; > + goto end; > + } > + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL); > + if (ret > 0) > + goto end; > + ff_format_io_close(v->parent, &v->input); > + v->cur_seq_no++; > + goto restart; > + > +end: > + return ret; > +} > + > +static int save_avio_options(AVFormatContext *s) > +{ > + DASHContext *c = s->priv_data; > + const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts; > + uint8_t *buf = NULL; > + int ret = 0; > + > + while (*opt) { > + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) { > + if (buf) { > + ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL); > + if (ret < 0) > + return ret; > + } > + } > + opt++; > + } > + > + return ret; > +} > + > +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, > + int flags, AVDictionary **opts) > +{ > + av_log(s, AV_LOG_ERROR, > + "A HDS playlist item '%s' referred to an external file '%s'. " > + "Opening this file was forbidden for security reasons\n", > + s->filename, url); > + return AVERROR(EPERM); > +} > + > +static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls) > +{ > + DASHContext *c = s->priv_data; > + AVInputFormat *in_fmt = NULL; > + AVDictionary *in_fmt_opts = NULL; > + uint8_t *avio_ctx_buffer = NULL; > + int ret = 0; > + > + if (pls->ctx) { > + /* note: the internal buffer could have changed, and be != avio_ctx_buffer */ > + av_freep(&pls->pb.buffer); > + memset(&pls->pb, 0x00, sizeof(AVIOContext)); > + pls->ctx->pb = NULL; > + avformat_close_input(&pls->ctx); > + pls->ctx = NULL; > + } > + if (!(pls->ctx = avformat_alloc_context())) { > + ret = AVERROR(ENOMEM); > + goto fail; > + } > + > + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE); > + if (!avio_ctx_buffer ){ > + ret = AVERROR(ENOMEM); > + avformat_free_context(pls->ctx); > + pls->ctx = NULL; > + goto fail; > + } > + if (c->is_live) { > + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL); > + } else { > + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data); > + } > + pls->pb.seekable = 0; > + > + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0) > + goto fail; > + > + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO; > + pls->ctx->probesize = 1024 * 4; > + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE; > + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0); > + if (ret < 0) { > + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx); > + avformat_free_context(pls->ctx); > + pls->ctx = NULL; > + goto fail; > + } > + > + pls->ctx->pb = &pls->pb; > + pls->ctx->io_open = nested_io_open; > + > + // provide additional information from mpd if available > + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url > + av_dict_free(&in_fmt_opts); > + if (ret < 0) > + goto fail; > + if (pls->n_fragments) { > + ret = avformat_find_stream_info(pls->ctx, NULL); > + if (ret < 0) > + goto fail; > + } > + > +fail: > + return ret; > +} > + > +static int open_demux_for_component(AVFormatContext *s, struct representation *pls) > +{ > + int ret = 0; > + int i; > + > + pls->parent = s; > + pls->cur_seq_no = calc_cur_seg_no(s, pls); > + pls->last_seq_no = calc_max_seg_no(s, pls); > + > + ret = reopen_demux_for_component(s, pls); > + if (ret < 0) { > + goto fail; > + } > + for (i = 0; i < pls->ctx->nb_streams; i++) { > + AVStream *st = avformat_new_stream(s, NULL); > + AVStream *ist = pls->ctx->streams[i]; > + if (!st) { > + ret = AVERROR(ENOMEM); > + goto fail; > + } > + st->id = i; > + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar); > + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den); > + } > + > + return 0; > +fail: > + return ret; > +} > + > +static int dash_read_header(AVFormatContext *s) > +{ > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > + DASHContext *c = s->priv_data; > + int ret = 0; > + int stream_index = 0; > + > + c->interrupt_callback = &s->interrupt_callback; > + // if the URL context is good, read important options we must broker later > + if (u) { > + update_options(&c->user_agent, "user-agent", u); > + update_options(&c->cookies, "cookies", u); > + update_options(&c->headers, "headers", u); > + } > + > + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0) > + goto fail; > + > + if ((ret = save_avio_options(s)) < 0) > + goto fail; > + > + /* If this isn't a live stream, fill the total duration of the > + * stream. */ > + if (!c->is_live) { > + s->duration = (int64_t) c->media_presentation_duration_sec * AV_TIME_BASE; > + } > + > + /* Open the demuxer for curent video and current audio components if available */ > + if (!ret && c->cur_video) { > + ret = open_demux_for_component(s, c->cur_video); > + if (!ret) { > + c->cur_video->stream_index = stream_index; > + ++stream_index; > + } else { > + free_representation(c->cur_video); > + c->cur_video = NULL; > + } > + } > + > + if (!ret && c->cur_audio) { > + ret = open_demux_for_component(s, c->cur_audio); > + if (!ret) { > + c->cur_audio->stream_index = stream_index; > + ++stream_index; > + } else { > + free_representation(c->cur_audio); > + c->cur_audio = NULL; > + } > + } > + > + if (!stream_index) { > + ret = AVERROR_INVALIDDATA; > + goto fail; > + } > + > + /* Create a program */ > + if (!ret) { > + AVProgram *program; > + program = av_new_program(s, 0); > + if (!program) { > + goto fail; > + } > + > + if (c->cur_video) { > + av_program_add_stream_index(s, 0, c->cur_video->stream_index); > + } > + > + if (c->cur_audio) { > + av_program_add_stream_index(s, 0, c->cur_audio->stream_index); > + } > + } > + > + return 0; > +fail: > + return ret; > +} > + > +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt) > +{ > + DASHContext *c = s->priv_data; > + int ret = 0; > + struct representation *cur = NULL; > + > + if (!c->cur_audio && !c->cur_video) { > + return AVERROR_INVALIDDATA; > + } > + if (c->cur_audio && !c->cur_video) { > + cur = c->cur_audio; > + } else if (!c->cur_audio && c->cur_video) { > + cur = c->cur_video; > + } else if (c->cur_video->cur_timestamp < c->cur_audio->cur_timestamp) { > + cur = c->cur_video; > + } else { > + cur = c->cur_audio; > + } > + > + if (cur->ctx) { > + ret = av_read_frame(cur->ctx, &cur->pkt); > + if (ret < 0) { > + av_packet_unref(&cur->pkt); > + } else { > + /* If we got a packet, return it */ > + *pkt = cur->pkt; > + cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den); > + pkt->stream_index = cur->stream_index; > + reset_packet(&cur->pkt); > + return 0; > + } > + } > + return AVERROR_EOF; > +} > + > +static int dash_close(AVFormatContext *s) > +{ > + DASHContext *c = s->priv_data; > + > + if (c->cur_audio) { > + free_representation(c->cur_audio); > + } > + > + if (c->cur_video) { > + free_representation(c->cur_video); > + } > + > + av_freep(&c->cookies); > + av_freep(&c->user_agent); > + av_dict_free(&c->avio_opts); > + av_freep(&c->base_url); > + return 0; > +} > + > +static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags) > +{ > + int ret = 0; > + int i = 0; > + int j = 0; > + int64_t duration = 0; > + > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d\n", seek_pos_msec, pls->rep_idx); > + > + // single fragment mode > + if (pls->n_fragments) { > + pls->cur_timestamp = 0; > + pls->cur_seg_offset = 0; > + ff_read_frame_flush(pls->ctx); > + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags); > + } > + > + if (pls->input) > + ff_format_io_close(pls->parent, &pls->input); > + > + // find the nearest fragment > + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) { > + int64_t num = pls->first_seq_no; > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist %d.\n", > + (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx); > + for (i = 0; i < pls->n_timelines; i++) { > + if (pls->timelines[i]->t > 0) { > + duration = pls->timelines[i]->t; > + } > + duration += pls->timelines[i]->d; > + if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) { > + goto set_seq_num; > + } > + for (j = 0; j < pls->timelines[i]->r; j++) { > + duration += pls->timelines[i]->d; > + num++; > + if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) { > + goto set_seq_num; > + } > + } > + num++; > + } > + > +set_seq_num: > + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num; > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n", > + (int64_t)pls->cur_seq_no, (int)pls->rep_idx); > + } else if (pls->fragment_duration > 0) { > + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000; > + } else { > + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing fragment_duration\n"); > + pls->cur_seq_no = pls->first_seq_no; > + } > + pls->cur_timestamp = 0; > + pls->cur_seg_offset = 0; > + pls->init_sec_buf_read_offset = 0; > + ret = reopen_demux_for_component(s, pls); > + > + return ret; > +} > + > +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) > +{ > + int ret = 0; > + DASHContext *c = s->priv_data; > + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000, > + s->streams[stream_index]->time_base.den, > + flags & AVSEEK_FLAG_BACKWARD ? > + AV_ROUND_DOWN : AV_ROUND_UP); > + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live) > + return AVERROR(ENOSYS); > + if (c->cur_audio) { > + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags); > + } > + if (!ret && c->cur_video) { > + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags); > + } > + return ret; > +} > + > +static int dash_probe(AVProbeData *p) > +{ > + if (!av_stristr(p->buf, "<MPD")) > + return 0; > + > + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") || > + av_stristr(p->buf, "dash:profile:isoff-live:2011") || > + av_stristr(p->buf, "dash:profile:isoff-live:2012") || > + av_stristr(p->buf, "dash:profile:isoff-main:2011")) { > + return AVPROBE_SCORE_MAX; > + } > + if (av_stristr(p->buf, "dash:profile")) { > + return AVPROBE_SCORE_MAX >> 1; > + } > + > + return 0; > +} > + > +#define OFFSET(x) offsetof(DASHContext, x) > +#define FLAGS AV_OPT_FLAG_DECODING_PARAM > +static const AVOption dash_options[] = { > + {"audio_rep_index", "audio representation index to be used", OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, FLAGS}, > + {"video_rep_index", "video representation index to be used", OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, FLAGS}, > + {NULL} > +}; > + > +static const AVClass dash_class = { > + .class_name = "dash", > + .item_name = av_default_item_name, > + .option = dash_options, > + .version = LIBAVUTIL_VERSION_INT, > +}; > + > +AVInputFormat ff_dash_demuxer = { > + .name = "dash", > + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"), > + .priv_class = &dash_class, > + .priv_data_size = sizeof(DASHContext), > + .read_probe = dash_probe, > + .read_header = dash_read_header, > + .read_packet = dash_read_packet, > + .read_close = dash_close, > + .read_seek = dash_read_seek, > + .flags = AVFMT_NO_BYTE_SEEK, > +}; > -- > 2.10.1 (Apple Git-78) > > > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
2017-03-22 22:01 GMT+08:00 Rodger Combs <rodger.combs@gmail.com>: > > > On Mar 21, 2017, at 08:16, Steven Liu <lq@chinaffmpeg.org> wrote: > > > > v2 fixed: > > 1. from autodetect to disabled > > 2. from camelCase code style to ffmpeg code style > > 3. from RepType to AVMediaType > > 4. fix variable typo > > 5. change time value from uint32_t to uint64_t > > 6. removed be used once API > > 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and > av_timegm > > 8. merge complex free operation to free_fragment > > 9. use API from snprintf to av_asprintf > > > > v3 fixed: > > 1. fix typo from --enabled-xml2 to --enable-xml2 > > > > v4 fixed: > > 1. from --enable-xml2 to --enable-libxml2 > > 2. move system includes to top > > 3. remove nouse includes > > 4. rename enum name > > 5. add a trailing comma for the last entry enum > > 6. fix comment typo > > 7. add const to DASHContext class front > > 8. check sscanf if return arguments and give warning message when error > > 9. check validity before free seg->url and seg > > 10. check if the val is null, before use atoll > > > > v5 fixed: > > 1. fix typo from mainifest to manifest > > > > v6 fixed: > > 1. from realloc to av_realloc > > 2. from free to av_free > > > > Reviewed-by: Clément Bœsch <u@pkh.me> > > Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> > > Reviewed-by: Carl Eugen Hoyos <cehoyos@ag.or.at> > > Reviewed-by: Rodger Combs <rodger.combs@gmail.com> > > Reviewed-by: Moritz Barsnick <barsnick@gmx.net> > > Reviewed-by: Nicolas George <george@nsup.org> > > Reviewed-by: Ricardo Constantino <wiiaboo@gmail.com> > > Signed-off-by: Steven Liu <lq@chinaffmpeg.org> > > --- > > configure | 4 + > > libavformat/Makefile | 1 + > > libavformat/allformats.c | 2 +- > > libavformat/dashdec.c | 1841 ++++++++++++++++++++++++++++++ > ++++++++++++++++ > > 4 files changed, 1847 insertions(+), 1 deletion(-) > > create mode 100644 libavformat/dashdec.c > > > > diff --git a/configure b/configure > > index 4eb116b..86d16a8 100755 > > --- a/configure > > +++ b/configure > > @@ -273,6 +273,7 @@ External library support: > > --enable-libxcb-shape enable X11 grabbing shape rendering > [autodetect] > > --enable-libxvid enable Xvid encoding via xvidcore, > > native MPEG-4/Xvid encoder exists [no] > > + --enable-libxml2 enable XML parsing using the C library > libxml2 [no] > > --enable-libzimg enable z.lib, needed for zscale filter [no] > > --enable-libzmq enable message passing via libzmq [no] > > --enable-libzvbi enable teletext support via libzvbi [no] > > @@ -1590,6 +1591,7 @@ EXTERNAL_LIBRARY_LIST=" > > libvpx > > libwavpack > > libwebp > > + libxml2 > > libzimg > > libzmq > > libzvbi > > @@ -2920,6 +2922,7 @@ avi_muxer_select="riffenc" > > caf_demuxer_select="iso_media riffdec" > > caf_muxer_select="iso_media" > > dash_muxer_select="mp4_muxer" > > +dash_demuxer_deps="libxml2" > > dirac_demuxer_select="dirac_parser" > > dts_demuxer_select="dca_parser" > > dtshd_demuxer_select="dca_parser" > > @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config > openssl openssl/ssl.h OPENSSL_init > > check_lib openssl/ssl.h SSL_library_init > -lssl -lcrypto -lws2_32 -lgdi32 || > > die "ERROR: openssl not found"; } > > enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || > disable qtkit_indev; } > > +enabled libxml2 && require_pkg_config libxml-2.0 > libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 > > > > # libdc1394 check > > if enabled libdc1394; then > > diff --git a/libavformat/Makefile b/libavformat/Makefile > > index f56ef16..d77ffaa 100644 > > --- a/libavformat/Makefile > > +++ b/libavformat/Makefile > > @@ -134,6 +134,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o > > OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o > > OBJS-$(CONFIG_DATA_MUXER) += rawenc.o > > OBJS-$(CONFIG_DASH_MUXER) += dashenc.o > > +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o > > OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o > > OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o > > OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o > > diff --git a/libavformat/allformats.c b/libavformat/allformats.c > > index 09e62c3..d57314b 100644 > > --- a/libavformat/allformats.c > > +++ b/libavformat/allformats.c > > @@ -96,7 +96,7 @@ static void register_all(void) > > REGISTER_DEMUXER (CINE, cine); > > REGISTER_DEMUXER (CONCAT, concat); > > REGISTER_MUXER (CRC, crc); > > - REGISTER_MUXER (DASH, dash); > > + REGISTER_MUXDEMUX(DASH, dash); > > REGISTER_MUXDEMUX(DATA, data); > > REGISTER_MUXDEMUX(DAUD, daud); > > REGISTER_DEMUXER (DCSTR, dcstr); > > diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c > > new file mode 100644 > > index 0000000..e0be85e > > --- /dev/null > > +++ b/libavformat/dashdec.c > > @@ -0,0 +1,1841 @@ > > +/* > > + * Dynamic Adaptive Streaming over HTTP demux > > + * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux > > + * Copyright (c) 2017 Steven Liu > > + * > > + * This file is part of FFmpeg. > > + * > > + * FFmpeg is free software; you can redistribute it and/or > > + * modify it under the terms of the GNU Lesser General Public > > + * License as published by the Free Software Foundation; either > > + * version 2.1 of the License, or (at your option) any later version. > > + * > > + * FFmpeg is distributed in the hope that it will be useful, > > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > > + * Lesser General Public License for more details. > > + * > > + * You should have received a copy of the GNU Lesser General Public > > + * License along with FFmpeg; if not, write to the Free Software > > + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA > 02110-1301 USA > > + */ > > +#include <libxml/parser.h> > > +#include "libavutil/intreadwrite.h" > > +#include "libavutil/opt.h" > > +#include "libavutil/time.h" > > +#include "libavutil/parseutils.h" > > +#include "internal.h" > > +#include "avio_internal.h" > > + > > +#define INITIAL_BUFFER_SIZE 32768 > > + > > +struct fragment { > > + int64_t url_offset; > > + int64_t size; > > + char *url; > > +}; > > + > > +/* > > + * reference to : ISO_IEC_23009-1-DASH-2012 > > + * Section: 5.3.9.6.2 > > + * Table: Table 17 — Semantics of SegmentTimeline element > > + * */ > > +struct timeline { > > + /* t: Element or Attribute Name > > + * specifies the MPD start time, in @timescale units, > > + * the first Segment in the series starts relative to the beginning > of the Period. > > + * The value of this attribute must be equal to or greater than the > sum of the previous S > > + * element earliest presentation time and the sum of the contiguous > Segment durations. > > + * If the value of the attribute is greater than what is expressed > by the previous S element, > > + * it expresses discontinuities in the timeline. > > + * If not present then the value shall be assumed to be zero for > the first S element > > + * and for the subsequent S elements, the value shall be assumed to > be the sum of > > + * the previous S element's earliest presentation time and > contiguous duration > > + * (i.e. previous S@t + @d * (@r + 1)). > > + * */ > > + int64_t t; > > + /* r: Element or Attribute Name > > + * specifies the repeat count of the number of following contiguous > Segments with > > + * the same duration expressed by the value of @d. This value is > zero-based > > + * (e.g. a value of three means four Segments in the contiguous > series). > > + * */ > > + int32_t r; > > + /* d: Element or Attribute Name > > + * specifies the Segment duration, in units of the value of the > @timescale. > > + * */ > > + int64_t d; > > +}; > > + > > +enum DASHTmplUrlType { > > + TMP_URL_TYPE_UNSPECIFIED, > > + TMP_URL_TYPE_NUMBER, > > + TMP_URL_TYPE_TIME, > > +}; > > + > > +/* > > + * Each playlist has its own demuxer. If it is currently active, > > + * it has an opened AVIOContext too, and potentially an AVPacket > > + * containing the next packet from this stream. > > + */ > > +struct representation { > > + char *url_template; > > + enum DASHTmplUrlType tmp_url_type; > > + AVIOContext pb; > > + AVIOContext *input; > > + AVFormatContext *parent; > > + AVFormatContext *ctx; > > + AVPacket pkt; > > + int rep_idx; > > + int rep_count; > > + int stream_index; > > + > > + enum AVMediaType type; > > + int64_t target_duration; > > + > > + int n_fragments; > > + struct fragment **fragments; /* VOD list of fragment for profile */ > > + > > + int n_timelines; > > + struct timeline **timelines; > > + > > + int64_t first_seq_no; > > + int64_t last_seq_no; > > + > > + int64_t fragment_duration; > > + int64_t fragment_timescale; > > + > > + int64_t cur_seq_no; > > + int64_t cur_seg_offset; > > + int64_t cur_seg_size; > > + struct fragment *cur_seg; > > + > > + /* Currently active Media Initialization Section */ > > + struct fragment *init_section; > > + uint8_t *init_sec_buf; > > + uint32_t init_sec_buf_size; > > + uint32_t init_sec_data_len; > > + uint32_t init_sec_buf_read_offset; > > + int fix_multiple_stsd_order; > > + int64_t cur_timestamp; > > +}; > > + > > +typedef struct DASHContext { > > + const AVClass *class; > > + char *base_url; > > + struct representation *cur_video; > > + struct representation *cur_audio; > > + uint64_t media_presentation_duration_sec; > > + uint64_t suggested_presentation_delay_sec; > > + uint64_t presentation_delay_sec; > > + uint64_t availability_start_time_sec; > > + uint64_t publish_time_sec; > > + uint64_t minimum_update_period_sec; > > + uint64_t time_shift_buffer_depth_sec; > > + uint64_t min_buffer_time_sec; > > + uint64_t period_duration_sec; > > + uint64_t period_start_sec; > > + int is_live; > > + int audio_rep_index; > > + int video_rep_index; > > + AVIOInterruptCB *interrupt_callback; > > + char *user_agent; ///< holds HTTP user agent set > as an AVOption to the HTTP protocol context > > + char *cookies; ///< holds HTTP cookie values > set in either the initial response or as an AVOption to the HTTP protocol > context > > + char *headers; ///< holds HTTP headers set as > an AVOption to the HTTP protocol context > > + AVDictionary *avio_opts; > > +} DASHContext; > > + > > +static uint64_t GetCurrentTimeInSec(void) > > +{ > > + return av_gettime() / 1000000; > > +} > > + > > +static uint64_t GetUTCDateTimeInSec(AVFormatContext *s, const char > *datetime) > > +{ > > + struct tm timeinfo; > > + int year = 0; > > + int month = 0; > > + int day = 0; > > + int hour = 0; > > + int minute = 0; > > + int ret = 0; > > + float second = 0.0; > > + > > + /* ISO-8601 date parser */ > > + if (!datetime) > > + return 0; > > + > > + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, > &hour, &minute, &second); > > + /* year, month, day, hour, minute, second 6 arguments */ > > + if (ret != 6) { > > + av_log(s, AV_LOG_WARNING, "GetUTCDateTimeInSec get a wrong time > format\n"); > > + // return 0; /* parser error */ > > + } > > + timeinfo.tm_year = year - 1900; > > + timeinfo.tm_mon = month - 1; > > + timeinfo.tm_mday = day; > > + timeinfo.tm_hour = hour; > > + timeinfo.tm_min = minute; > > + timeinfo.tm_sec = (int)second; > > + > > + return av_timegm(&timeinfo); > > +} > > + > > +static uint32_t GetDurationInSec(AVFormatContext *s, const char > *duration) > > +{ > > + /* ISO-8601 duration parser */ > > + uint32_t days = 0; > > + uint32_t hours = 0; > > + uint32_t mins = 0; > > + uint32_t secs = 0; > > + uint32_t size = 0; > > + float value = 0; > > + uint8_t type = 0; > > + const char *ptr = duration; > > + > > + while (*ptr) { > > + if (*ptr == 'P' || *ptr == 'T') { > > + ptr++; > > + continue; > > + } > > + > > + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) { > > + av_log(s, AV_LOG_WARNING, "GetDurationInSec get a wrong > time format\n"); > > + return 0; /* parser error */ > > + } > > + switch (type) { > > + case 'D': > > + days = (uint32_t)value; > > + break; > > + case 'H': > > + hours = (uint32_t)value; > > + break; > > + case 'M': > > + mins = (uint32_t)value; > > + break; > > + case 'S': > > + secs = (uint32_t)value; > > + break; > > + default: > > + // handle invalid type > > + break; > > + } > > + ptr += size; > > + } > > + return ((days * 24 + hours) * 60 + mins) * 60 + secs; > > +} > > + > > +static void free_fragment(struct fragment **seg) > > +{ > > + if (!(*seg)) { > > + return; > > + } > > + av_freep(&(*seg)->url); > > + av_freep(seg); > > +} > > + > > +static void free_fragment_list(struct representation *pls) > > +{ > > + int i; > > + > > + for (i = 0; i < pls->n_fragments; i++) { > > + free_fragment(&pls->fragments[i]); > > + } > > + av_freep(&pls->fragments); > > + pls->n_fragments = 0; > > +} > > + > > +static void free_timelines_list(struct representation *pls) > > +{ > > + int i; > > + > > + for (i = 0; i < pls->n_timelines; i++) { > > + av_freep(&pls->timelines[i]); > > + } > > + av_freep(&pls->timelines); > > + pls->n_timelines = 0; > > +} > > + > > +/* > > + * Used to reset a statically allocated AVPacket to a clean slate, > > + * containing no data. > > + */ > > +static void reset_packet(AVPacket *pkt) > > +{ > > + av_init_packet(pkt); > > + pkt->data = NULL; > > +} > > + > > +static void free_representation(struct representation *pls) > > +{ > > + free_fragment_list(pls); > > + free_timelines_list(pls); > > + free_fragment(&pls->cur_seg); > > + free_fragment(&pls->init_section); > > + av_freep(&pls->init_sec_buf); > > + av_packet_unref(&pls->pkt); > > + reset_packet(&pls->pkt); > > + av_freep(&pls->pb.buffer); > > + if (pls->input) > > + ff_format_io_close(pls->parent, &pls->input); > > + if (pls->ctx) { > > + pls->ctx->pb = NULL; > > + avformat_close_input(&pls->ctx); > > + } > > + > > + av_free(pls->url_template); > > + av_free(pls); > > +} > > + > > +static void update_options(char **dest, const char *name, void *src) > > +{ > > + av_freep(dest); > > + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest); > > + if (*dest) > > + av_freep(dest); > > +} > > + > > +static int open_url(AVFormatContext *s, AVIOContext **pb, const char > *url, > > + AVDictionary *opts, AVDictionary *opts2, int > *is_http) > > +{ > > + DASHContext *c = s->priv_data; > > + AVDictionary *tmp = NULL; > > + const char *proto_name = NULL; > > + int ret; > > + > > + av_dict_copy(&tmp, opts, 0); > > + av_dict_copy(&tmp, opts2, 0); > > + > > + if (av_strstart(url, "crypto", NULL)) { > > + if (url[6] == '+' || url[6] == ':') > > + proto_name = avio_find_protocol_name(url + 7); > > + } > > + > > + if (!proto_name) > > + proto_name = avio_find_protocol_name(url); > > + > > + if (!proto_name) > > + return AVERROR_INVALIDDATA; > > + > > + // only http(s) & file are allowed > > + if (!av_strstart(proto_name, "http", NULL) && > !av_strstart(proto_name, "file", NULL)) > > + return AVERROR_INVALIDDATA; > > + if (!strncmp(proto_name, url, strlen(proto_name)) && > url[strlen(proto_name)] == ':') > > + ; > > + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, > url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') > > + ; > > + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) > > + return AVERROR_INVALIDDATA; > > + > > + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp); > > + if (ret >= 0) { > > + // update cookies on http response with setcookies. > > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > > + update_options(&c->cookies, "cookies", u); > > + av_dict_set(&opts, "cookies", c->cookies, 0); > > + } > > + > > + av_dict_free(&tmp); > > + > > + if (is_http) > > + *is_http = av_strstart(proto_name, "http", NULL); > > + > > + return ret; > > + > > +} > > + > > +static char *strreplace(const char *str, const char *from, const char > *to) > > +{ > > + /* Adjust each of the below values to suit your needs. */ > > + /* Increment positions cache size initially by this number. */ > > + size_t cache_sz_inc = 16; > > + /* Thereafter, each time capacity needs to be increased, > > + * multiply the increment by this factor. */ > > + const size_t cache_sz_inc_factor = 3; > > + /* But never increment capacity by more than this number. */ > > + const size_t cache_sz_inc_max = 1048576; > > + > > + char *pret, *ret = NULL; > > + const char *pstr2, *pstr = str; > > + size_t i, count = 0; > > + uintptr_t *pos_cache_tmp, *pos_cache = NULL; > > + size_t cache_sz = 0; > > + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from); > > + > > + /* Find all matches and cache their positions. */ > > + while ((pstr2 = av_stristr(pstr, from))) { > > + count++; > > + /* Increase the cache size when necessary. */ > > + if (cache_sz < count) { > > + cache_sz += cache_sz_inc; > > + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) * > cache_sz); > > + if (!pos_cache_tmp) { > > + goto end_strreplace; > > + } else pos_cache = pos_cache_tmp; > > + cache_sz_inc *= cache_sz_inc_factor; > > + if (cache_sz_inc > cache_sz_inc_max) { > > + cache_sz_inc = cache_sz_inc_max; > > + } > > + } > > + > > + pos_cache[count-1] = pstr2 - str; > > + pstr = pstr2 + fromlen; > > + } > > + orglen = pstr - str + strlen(pstr); > > + /* Allocate memory for the post-replacement string. */ > > + if (count > 0) { > > + tolen = strlen(to); > > + retlen = orglen + (tolen - fromlen) * count; > > + } else { > > + retlen = orglen; > > + } > > + ret = av_malloc(retlen + 1); > > + if (!ret) { > > + goto end_strreplace; > > + } > > + > > + if (!count) { > > + /* If no matches, then just duplicate the string. */ > > + av_strlcpy(ret, str, retlen + 1); > > + } else { > > + /* Otherwise, duplicate the string whilst performing > > + * the replacements using the position cache. */ > > + pret = ret; > > + memcpy(pret, str, pos_cache[0]); > > + pret += pos_cache[0]; > > + for (i = 0; i < count; i++) { > > + memcpy(pret, to, tolen); > > + pret += tolen; > > + pstr = str + pos_cache[i] + fromlen; > > + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) - > pos_cache[i] - fromlen; > > + memcpy(pret, pstr, cpylen); > > + pret += cpylen; > > + } > > + ret[retlen] = '\0'; > > + } > > + > > +end_strreplace: > > + /* Free the cache and return the post-replacement string, > > + * which will be NULL in the event of an error. */ > > + av_free(pos_cache); > > + return ret; > > +} > > + > > +static char *replace_template_str(const char *url, const char *marker) > > +{ > > + char *prefix = NULL; > > + char *start = 0; > > + char *end = NULL; > > + char *tmp_url = NULL; > > + char *new_url = NULL; > > + int marker_len; > > + > > + prefix = av_strdup(marker); > > + marker_len = strlen(prefix) - 1; > > + prefix[marker_len] = '\0'; > > + > > + start = av_stristr(url, prefix); > > + if (!start) > > + goto finish; > > + end = strchr(start + 1, '$'); > > + if (!end) > > + goto finish; > > + > > + if (start[marker_len] != '%') > > + goto finish; > > + > > + if (end[-1] != 'd') > > + goto finish; > > + > > + tmp_url = av_mallocz(MAX_URL_SIZE); > > + if (!tmp_url) { > > + return NULL; > > + } > > + > > + av_strlcpy(tmp_url, url, start - url+ 1); > > + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end - > start - marker_len); > > + av_strlcat(tmp_url, PRId64, MAX_URL_SIZE); > > + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE); > > + > > +finish: > > + av_free(prefix); > > + new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64); > > + av_free(tmp_url); > > + return new_url; > > +} > > + > > +static char *get_content_url(xmlNodePtr *baseurl_nodes, int > n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar > *val) > > +{ > > + int i; > > + xmlChar *text; > > + char *url = NULL; > > + char *tmp_str = av_mallocz(MAX_URL_SIZE); > > + char *tmp_str_2 = NULL; > > + > > + if (!tmp_str) { > > + return NULL; > > + } > > + for (i = 0; i < n_baseurl_nodes; ++i) { > > + if (baseurl_nodes[i] && baseurl_nodes[i]->children && > baseurl_nodes[i]->children->type == XML_TEXT_NODE) { > > + text = xmlNodeGetContent(baseurl_nodes[i]->children); > > + if (text) { > > + tmp_str_2 = av_mallocz(MAX_URL_SIZE); > > + if (!tmp_str_2) { > > + av_free(tmp_str); > > + return NULL; > > + } > > + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, > text); > > + av_free(tmp_str); > > + tmp_str = tmp_str_2; > > + xmlFree(text); > > + } > > + } > > + } > > + if (val) > > + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE); > > + if (rep_id_val) { > > + url = strreplace(tmp_str, "$RepresentationID$", (const > char*)rep_id_val); > > + av_free(tmp_str); > > + tmp_str = url; > > + } > > + if (rep_bandwidth_val && tmp_str) > > + url = strreplace(tmp_str, "$Bandwidth$", (const > char*)rep_bandwidth_val); > > + if (tmp_str != url) > > + av_free(tmp_str); > > + return url; > > +} > > + > > +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int > n_nodes, const xmlChar *attrname) > > +{ > > + int i; > > + xmlChar *val; > > + > > + for (i = 0; i < n_nodes; ++i) { > > + if (nodes[i]) { > > + val = xmlGetProp(nodes[i], attrname); > > + if (val) > > + return val; > > + } > > + } > > + > > + return NULL; > > +} > > + > > +static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const > xmlChar *nodename) > > +{ > > + xmlNodePtr node = rootnode; > > + if (!node) { > > + return NULL; > > + } > > + > > + node = xmlFirstElementChild(node); > > + while (node) { > > + if (!xmlStrcmp(node->name, nodename)) { > > + return node; > > + } > > + node = xmlNextElementSibling(node); > > + } > > + return NULL; > > +} > > + > > +static enum AVMediaType get_content_type(xmlNodePtr node) > > +{ > > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > > + int i = 0; > > + const char *attr; > > + > > + if (node) { > > + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) { > > + attr = (i) ? "mimeType" : "contentType"; > > + xmlChar *val = xmlGetProp(node, attr); > > + if (val) { > > + if (av_stristr((const char *)val, "video")) { > > + type = AVMEDIA_TYPE_VIDEO; > > + } else if (av_stristr((const char *)val, "audio")) { > > + type = AVMEDIA_TYPE_AUDIO; > > + } > > + xmlFree(val); > > + } > > + i++; > > + } > > + } > > + return type; > > +} > > + > > +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct > representation *rep, > > + xmlNodePtr fragmenturl_node, > > + xmlNodePtr *baseurl_nodes, > > + xmlChar *rep_id_val, > > + xmlChar *rep_bandwidth_val) > > +{ > > + xmlChar *initialization_val = NULL; > > + xmlChar *media_val = NULL; > > + > > + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar > *)"Initialization")) { > > + initialization_val = xmlGetProp(fragmenturl_node, "sourceURL"); > > + if (initialization_val) { > > + rep->init_section = av_mallocz(sizeof(struct fragment)); > > + if (!rep->init_section) { > > + xmlFree(initialization_val); > > + return AVERROR(ENOMEM); > > + } > > + rep->init_section->url = get_content_url(baseurl_nodes, 4, > rep_id_val, rep_bandwidth_val, initialization_val); > > + rep->init_section->size = -1; > > + xmlFree(initialization_val); > > + } > > + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar > *)"SegmentURL")) { > > + media_val = xmlGetProp(fragmenturl_node, "media"); > > + if (media_val) { > > + struct fragment *seg = av_mallocz(sizeof(struct fragment)); > > + if (!seg) { > > + xmlFree(media_val); > > + return AVERROR(ENOMEM); > > + } > > + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, > rep_bandwidth_val, media_val); > > + seg->size = -1; > > + dynarray_add(&rep->fragments, &rep->n_fragments, seg); > > + xmlFree(media_val); > > + } > > + } > > + > > + return 0; > > +} > > + > > +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct > representation *rep, > > + xmlNodePtr > fragment_timeline_node) > > +{ > > + xmlAttrPtr attr = NULL; > > + xmlChar *val = NULL; > > + > > + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar > *)"S")) { > > + struct timeline *tml = av_mallocz(sizeof(struct timeline)); > > + if (!tml) { > > + return AVERROR(ENOMEM); > > + } > > + attr = fragment_timeline_node->properties; > > + while (attr) { > > + val = xmlGetProp(fragment_timeline_node, attr->name); > > + > > + if (!val) { > > + av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline > attr->name = %s val is NULL\n", attr->name); > > + continue; > > + } > > + > > + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) { > > + tml->t = (int64_t)atoll((const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) { > > + tml->r =(int32_t) atoi((const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) { > > + tml->d = (int64_t)atoll((const char *)val); > > + rep->fragment_duration = (int64_t) atoll((const char > *)val); > > + } > > + attr = attr->next; > > + xmlFree(val); > > + } > > + dynarray_add(&rep->timelines, &rep->n_timelines, tml); > > + } > > + > > + return 0; > > +} > > + > > +static int parse_manifest_representation(AVFormatContext *s, const > char *url, > > + xmlNodePtr node, > > + xmlNodePtr adaptionset_node, > > + xmlNodePtr mpd_baseurl_node, > > + xmlNodePtr > period_baseurl_node, > > + xmlNodePtr > fragment_template_node, > > + xmlNodePtr > content_component_node, > > + xmlNodePtr > adaptionset_baseurl_node) > > +{ > > + int32_t ret = 0; > > + int32_t audio_rep_idx = 0; > > + int32_t video_rep_idx = 0; > > + char *temp_string = NULL; > > + DASHContext *c = s->priv_data; > > + struct representation *rep = NULL; > > + struct fragment *seg = NULL; > > + xmlNodePtr representation_segmenttemplate_node = NULL; > > + xmlNodePtr representation_baseurl_node = NULL; > > + xmlNodePtr representation_segmentlist_node = NULL; > > + xmlNodePtr fragment_timeline_node = NULL; > > + xmlNodePtr fragment_templates_tab[2]; > > + xmlChar *duration_val = NULL; > > + xmlChar *startnumber_val = NULL; > > + xmlChar *timescale_val = NULL; > > + xmlChar *initialization_val = NULL; > > + xmlChar *media_val = NULL; > > + xmlNodePtr baseurl_nodes[4]; > > + xmlNodePtr representation_node = node; > > + xmlChar *rep_id_val = xmlGetProp(representation_node, "id"); > > + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, > "bandwidth"); > > + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > > + > > + // try get information from representation > > + if (type == AVMEDIA_TYPE_UNKNOWN) > > + type = get_content_type(representation_node); > > + // try get information from contentComponen > > + if (type == AVMEDIA_TYPE_UNKNOWN) > > + type = get_content_type(content_component_node); > > + // try get information from adaption set > > + if (type == AVMEDIA_TYPE_UNKNOWN) > > + type = get_content_type(adaptionset_node); > > + if (type == AVMEDIA_TYPE_UNKNOWN) { > > + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported > representation type\n", url); > > + } else if ((type == AVMEDIA_TYPE_VIDEO && ((c->video_rep_index < 0 > && !c->cur_video) || > > + video_rep_idx == > (int32_t)c->video_rep_index )) || > > + (type == AVMEDIA_TYPE_AUDIO && ((c->audio_rep_index < 0 > && !c->cur_audio) || > > + audio_rep_idx == > (int32_t)c->audio_rep_index ))) { > > + // convert selected representation to our internal struct > > + rep = av_mallocz(sizeof(struct representation)); > > + if (!rep) { > > + ret = AVERROR(ENOMEM); > > + goto end; > > + } > > + representation_segmenttemplate_node = findChildNodeByName(representation_node, > "SegmentTemplate"); > > + representation_baseurl_node = findChildNodeByName(representation_node, > "BaseURL"); > > + representation_segmentlist_node = findChildNodeByName(representation_node, > "SegmentList"); > > + reset_packet(&rep->pkt); > > + > > + baseurl_nodes[0] = mpd_baseurl_node; > > + baseurl_nodes[1] = period_baseurl_node; > > + baseurl_nodes[2] = adaptionset_baseurl_node; > > + baseurl_nodes[3] = representation_baseurl_node; > > + > > + if (representation_segmenttemplate_node || > fragment_template_node) { > > + fragment_timeline_node = NULL; > > + fragment_templates_tab[0] = representation_ > segmenttemplate_node; > > + fragment_templates_tab[1] = fragment_template_node; > > + > > + duration_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "duration"); > > + startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "startNumber"); > > + timescale_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "timescale"); > > + initialization_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "initialization"); > > + media_val = get_val_from_nodes_tab(fragment_templates_tab, > 2, "media"); > > + > > + if (initialization_val) { > > + rep->init_section = av_mallocz(sizeof(struct fragment)); > > + if (!rep->init_section) { > > + av_free(rep); > > + ret = AVERROR(ENOMEM); > > + goto end; > > + } > > + rep->init_section->url = get_content_url(baseurl_nodes, > 4, rep_id_val, rep_bandwidth_val, initialization_val); > > + rep->init_section->size = -1; > > + xmlFree(initialization_val); > > + } > > + > > + if (media_val) { > > + temp_string = get_content_url(baseurl_nodes, 4, > rep_id_val, rep_bandwidth_val, media_val); > > + if (temp_string) { > > + if (av_stristr(temp_string, "$Number")) { > > + rep->url_template = replace_template_str(temp_string, > "$Number$"); > > + /* A URL template is provided from which > clients build a chunk list > > + * where the chunk URLs include chunk numbers > (like index numbers). > > + */ > > + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* > Number-Based. */ > > + } else if (av_stristr(temp_string, "$Time")) { > > + rep->url_template = replace_template_str(temp_string, > "$Time$"); > > + /* A URL template is provided from which > clients build a chunk list > > + * where the chunk URLs include chunk start > times. > > + */ > > + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* > Time-Based. */ > > + } else { > > + rep->url_template = temp_string; > > + temp_string = NULL; > > + } > > + av_free(temp_string); > > + } > > + xmlFree(media_val); > > + } > > + if (duration_val) { > > + rep->fragment_duration = (int64_t) atoll((const char > *)duration_val); > > + xmlFree(duration_val); > > + } > > + if (timescale_val) { > > + rep->fragment_timescale = (int64_t) atoll((const char > *)timescale_val); > > + xmlFree(timescale_val); > > + } > > + if (startnumber_val) { > > + rep->first_seq_no = (int64_t) atoll((const char > *)startnumber_val); > > + xmlFree(startnumber_val); > > + } > > + > > + fragment_timeline_node = findChildNodeByName( > representation_segmenttemplate_node, "SegmentTimeline"); > > + > > + if (!fragment_timeline_node) > > + fragment_timeline_node = findChildNodeByName(fragment_template_node, > "SegmentTimeline"); > > + if (fragment_timeline_node) { > > + fragment_timeline_node = xmlFirstElementChild(fragment_ > timeline_node); > > + while (fragment_timeline_node) { > > + ret = parse_manifest_segmenttimeline(s, rep, > fragment_timeline_node); > > + if (ret < 0) { > > + return ret; > > + } > > + fragment_timeline_node = xmlNextElementSibling( > fragment_timeline_node); > > + } > > + } > > + } else if (representation_baseurl_node && > !representation_segmentlist_node) { > > + seg = av_mallocz(sizeof(struct fragment)); > > + if (!seg) { > > + ret = AVERROR(ENOMEM); > > + goto end; > > + } > > + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, > rep_bandwidth_val, NULL); > > + seg->size = -1; > > + dynarray_add(&rep->fragments, &rep->n_fragments, seg); > > + } else if (!representation_baseurl_node && > representation_segmentlist_node) { > > + // TODO: https://www.brendanlong.com/ > the-structure-of-an-mpeg-dash-mpd.html > > + // http://www-itec.uni-klu.ac.at/ > dash/ddash/mpdGenerator.php?fragmentlength=15&type=full > > + xmlNodePtr fragmenturl_node = NULL; > > + duration_val = xmlGetProp(representation_segmentlist_node, > "duration"); > > + timescale_val = xmlGetProp(representation_segmentlist_node, > "timescale"); > > + if (duration_val) { > > + rep->fragment_duration = (int64_t) atoll((const char > *)duration_val); > > + xmlFree(duration_val); > > + } > > + if (timescale_val) { > > + rep->fragment_timescale = (int64_t) atoll((const char > *)timescale_val); > > + xmlFree(timescale_val); > > + } > > + fragmenturl_node = xmlFirstElementChild( > representation_segmentlist_node); > > + while (fragmenturl_node) { > > + ret = parse_manifest_segmenturlnode(s, rep, > fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val); > > + if (ret < 0) { > > + return ret; > > + } > > + fragmenturl_node = xmlNextElementSibling( > fragmenturl_node); > > + } > > + } else { > > + free_representation(rep); > > + rep = NULL; > > + av_log(s, AV_LOG_ERROR, "Unknown format of Representation > node id[%s] \n", (const char *)rep_id_val); > > + } > > + > > + if (rep) { > > + if (rep->fragment_duration > 0 && !rep->fragment_timescale) > > + rep->fragment_timescale = 1; > > + if (type == AVMEDIA_TYPE_VIDEO) { > > + rep->rep_idx = video_rep_idx; > > + c->cur_video = rep; > > + } else { > > + rep->rep_idx = audio_rep_idx; > > + c->cur_audio = rep; > > + } > > + } > > + } > > + > > + video_rep_idx += type == AVMEDIA_TYPE_VIDEO; > > + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO; > > + > > +end: > > + if (rep_id_val) > > + xmlFree(rep_id_val); > > + if (rep_bandwidth_val) > > + xmlFree(rep_bandwidth_val); > > + > > + return ret; > > +} > > + > > +static int parse_manifest_adaptationset(AVFormatContext *s, const char > *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr > period_baseurl_node) > > +{ > > + int ret = 0; > > + xmlNodePtr fragment_template_node = NULL; > > + xmlNodePtr content_component_node = NULL; > > + xmlNodePtr adaptionset_baseurl_node = NULL; > > + xmlNodePtr node = NULL; > > + > > + node = xmlFirstElementChild(adaptionset_node); > > + while (node) { > > + if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) > { > > + fragment_template_node = node; > > + } else if (!xmlStrcmp(node->name, (const xmlChar > *)"ContentComponent")) { > > + content_component_node = node; > > + } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) { > > + adaptionset_baseurl_node = node; > > + } else if (!xmlStrcmp(node->name, (const xmlChar > *)"Representation")) { > > + ret = parse_manifest_representation(s, url, node, > > + adaptionset_node, > > + mpd_baseurl_node, > > + period_baseurl_node, > > + fragment_template_node, > > + content_component_node, > > + > adaptionset_baseurl_node); > > + if (ret < 0) { > > + return ret; > > + } > > + } > > + node = xmlNextElementSibling(node); > > + } > > + return 0; > > +} > > + > > + > > +static int parse_manifest(AVFormatContext *s, const char *url, > AVIOContext *in) > > +{ > > + DASHContext *c = s->priv_data; > > + int ret = 0; > > + int close_in = 0; > > + uint8_t *new_url = NULL; > > + int64_t filesize = 0; > > + char *buffer = NULL; > > + AVDictionary *opts = NULL; > > + xmlDoc *doc = NULL; > > + xmlNodePtr root_element = NULL; > > + xmlNodePtr node = NULL; > > + xmlNodePtr period_node = NULL; > > + xmlNodePtr mpd_baseurl_node = NULL; > > + xmlNodePtr period_baseurl_node = NULL; > > + xmlNodePtr adaptionset_node = NULL; > > + xmlAttrPtr attr = NULL; > > + xmlChar *val = NULL; > > + uint32_t perdiod_duration_sec = 0; > > + uint32_t perdiod_start_sec = 0; > > + int32_t audio_rep_idx = 0; > > + int32_t video_rep_idx = 0; > > + > > + if (!in) { > > + close_in = 1; > > + /* This is XML manifest there is no need to set range header */ > > + av_dict_set(&opts, "seekable", "0", 0); > > + // broker prior HTTP options that should be consistent across > requests > > + av_dict_set(&opts, "user-agent", c->user_agent, 0); > > + av_dict_set(&opts, "cookies", c->cookies, 0); > > + av_dict_set(&opts, "headers", c->headers, 0); > > + > > + ret = avio_open2(&in, url, AVIO_FLAG_READ, > c->interrupt_callback, &opts); > > + av_dict_free(&opts); > > + if (ret < 0) > > + return ret; > > + } > > + > > + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= > 0) { > > + c->base_url = av_strdup(new_url); > > + } else { > > + c->base_url = av_strdup(url); > > + } > > + > > + filesize = avio_size(in); > > + if (filesize <= 0){ > > + filesize = 8 * 1024; > > + } > > + > > + buffer = av_mallocz(filesize); > > + if (!buffer) { > > + return AVERROR(ENOMEM); > > + } > > + > > + filesize = avio_read(in, buffer, filesize); > > + if (filesize > 0) { > > + LIBXML_TEST_VERSION > > + > > + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0); > > + root_element = xmlDocGetRootElement(doc); > > + node = root_element; > > + > > + if (!node) { > > + ret = AVERROR_INVALIDDATA; > > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing > root node\n", url); > > + goto cleanup; > > + } > > + > > + if (node->type != XML_ELEMENT_NODE || > > + xmlStrcmp(node->name, (const xmlChar *)"MPD")) { > > + ret = AVERROR_INVALIDDATA; > > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root > node name[%s] type[%d]\n", url, node->name, (int)node->type); > > + goto cleanup; > > + } > > + > > + val = xmlGetProp(node, "type"); > > + if (!val) { > > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing > type attrib\n", url); > > + ret = AVERROR_INVALIDDATA; > > + goto cleanup; > > + } > > + if (!xmlStrcmp(val, (const xmlChar *)"dynamic")) > > + c->is_live = 1; > > + xmlFree(val); > > + > > + attr = node->properties; > > + while (attr) { > > + val = xmlGetProp(node, attr->name); > > + > > + if (!xmlStrcmp(attr->name, (const xmlChar > *)"availabilityStartTime")) { > > + c->availability_start_time_sec = GetUTCDateTimeInSec(s, > (const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"publishTime")) { > > + c->publish_time_sec = GetUTCDateTimeInSec(s, (const > char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"minimumUpdatePeriod")) { > > + c->minimum_update_period_sec = GetDurationInSec(s, > (const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"timeShiftBufferDepth")) { > > + c->time_shift_buffer_depth_sec = GetDurationInSec(s, > (const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"minBufferTime")) { > > + c->min_buffer_time_sec = GetDurationInSec(s, (const > char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"suggestedPresentationDelay")) { > > + c->suggested_presentation_delay_sec = > GetDurationInSec(s, (const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"mediaPresentationDuration")) { > > + c->media_presentation_duration_sec = > GetDurationInSec(s, (const char *)val); > > + } > > + attr = attr->next; > > + xmlFree(val); > > + } > > + > > + mpd_baseurl_node = findChildNodeByName(node, "BaseURL"); > > + > > + // at now we can handle only one period, with the longest > duration > > + node = xmlFirstElementChild(node); > > + while (node) { > > + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) { > > + perdiod_duration_sec = 0; > > + perdiod_start_sec = 0; > > + attr = node->properties; > > + while (attr) { > > + val = xmlGetProp(node, attr->name); > > + if (!xmlStrcmp(attr->name, (const xmlChar > *)"duration")) { > > + perdiod_duration_sec = GetDurationInSec(s, > (const char *)val); > > + } else if (!xmlStrcmp(attr->name, (const xmlChar > *)"start")) { > > + perdiod_start_sec = GetDurationInSec(s, (const > char *)val); > > + } > > + attr = attr->next; > > + xmlFree(val); > > + } > > + if ((perdiod_duration_sec) >= (c->period_duration_sec)) > { > > + period_node = node; > > + c->period_duration_sec = perdiod_duration_sec; > > + c->period_start_sec = perdiod_start_sec; > > + if (c->period_start_sec > 0) > > + c->media_presentation_duration_sec = > c->period_duration_sec; > > + } > > + } > > + node = xmlNextElementSibling(node); > > + } > > + if (!period_node) { > > + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing > Period node\n", url); > > + ret = AVERROR_INVALIDDATA; > > + goto cleanup; > > + } > > + // explore AdaptationSet > > + adaptionset_node = xmlFirstElementChild(period_node); > > + while (adaptionset_node) { > > + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar > *)"BaseURL")) { > > + period_baseurl_node = adaptionset_node; > > + } else if (!xmlStrcmp(adaptionset_node->name, (const > xmlChar *)"AdaptationSet")) { > > + parse_manifest_adaptationset(s, url, adaptionset_node, > mpd_baseurl_node, period_baseurl_node); > > + } > > + adaptionset_node = xmlNextElementSibling(adaptionset_node); > > + } > > + if (c->cur_video) { > > + c->cur_video->rep_count = video_rep_idx; > > + c->cur_video->fix_multiple_stsd_order = 1; > > + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", > (int)c->cur_video->rep_idx); > > + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", > (int)video_rep_idx); > > + } > > + if (c->cur_audio) { > > + c->cur_audio->rep_count = audio_rep_idx; > > + } > > + > > +cleanup: > > + /*free the document */ > > + xmlFreeDoc(doc); > > + xmlCleanupParser(); > > + } else { > > + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url); > > + ret = AVERROR_INVALIDDATA; > > + } > > + > > + av_free(new_url); > > + av_free(buffer); > > + if (close_in) { > > + avio_close(in); > > + } > > + return ret; > > +} > > + > > +static int64_t calc_cur_seg_no(AVFormatContext *s, struct > representation *pls) > > +{ > > + DASHContext *c = pls->parent->priv_data; > > + int64_t num = 0; > > + > > + if (c->is_live) { > > + if (!pls->fragment_duration) { > > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration > value in live mode\n"); > > + return pls->first_seq_no; > > + } > > + num = pls->first_seq_no + (((GetCurrentTimeInSec() - > c->availability_start_time_sec) - c->presentation_delay_sec) * > pls->fragment_timescale) / pls->fragment_duration; > > + } else { > > + num = pls->first_seq_no; > > + } > > + return num; > > +} > > + > > +static int64_t calc_min_seg_no(AVFormatContext *s, struct > representation *pls) > > +{ > > + DASHContext *c = pls->parent->priv_data; > > + int64_t num = 0; > > + > > + if (c->is_live) { > > + if (!pls->fragment_duration) { > > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration > value in live mode\n"); > > + return pls->first_seq_no; > > + } > > + num = pls->first_seq_no + (((GetCurrentTimeInSec() - > c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) * > pls->fragment_timescale) / pls->fragment_duration; > > + } else { > > + num = pls->first_seq_no; > > + } > > + return num; > > +} > > + > > +static int64_t calc_max_seg_no(AVFormatContext *s, struct > representation *pls) > > +{ > > + DASHContext *c = pls->parent->priv_data; > > + int64_t num = 0; > > + int64_t i = 0; > > + > > + if (c->is_live) { > > + if (!pls->fragment_duration) { > > + av_log(s, AV_LOG_ERROR, "Get not get fragment duration > value in live mode\n"); > > + return pls->first_seq_no; > > + } > > + num = pls->first_seq_no + (((GetCurrentTimeInSec() - > c->availability_start_time_sec)) * pls->fragment_timescale) / > pls->fragment_duration; > > + } else { > > + if (pls->n_fragments) { > > + num = pls->first_seq_no + pls->n_fragments - 1; > > + } else if (pls->n_timelines) { > > + num = pls->first_seq_no + pls->n_timelines - 1; > > + for (i = 0; i < pls->n_timelines; ++i) { > > + num += pls->timelines[i]->r; > > + } > > + } else { > > + num = pls->first_seq_no + (c->media_presentation_duration_sec > * pls->fragment_timescale) / pls->fragment_duration; > > + } > > + } > > + > > + return num; > > +} > > + > > +static int64_t get_fragment_start_time(struct representation *pls, > int64_t cur_seq_no) > > +{ > > + int64_t i = 0; > > + int64_t j = 0; > > + int64_t num = 0; > > + int64_t startTime = 0; > > + > > + if (pls->n_timelines) { > > + for (i = 0; i < pls->n_timelines; ++i) { > > + if (pls->timelines[i]->t > 0) { > > + startTime = pls->timelines[i]->t; > > + } > > + if (num == cur_seq_no) > > + goto finish; > > + startTime += pls->timelines[i]->d; > > + for (j = 0; j < pls->timelines[i]->r; ++j) { > > + num++; > > + if (num == cur_seq_no) > > + goto finish; > > + startTime += pls->timelines[i]->d; > > + } > > + num++; > > + } > > + } > > + > > +finish: > > + return startTime; > > +} > > + > > +static struct fragment *get_current_fragment(struct representation *pls) > > +{ > > + int64_t min_seq_no = 0; > > + int64_t max_seq_no = 0; > > + char *tmp_str = NULL; > > + struct fragment *seg = NULL; > > + struct fragment *seg_ptr = NULL; > > + DASHContext *c = pls->parent->priv_data; > > + > > + if (pls->n_fragments > 0) { > > + if (pls->cur_seq_no < pls->n_fragments) { > > + seg_ptr = pls->fragments[pls->cur_seq_no]; > > + seg = av_mallocz(sizeof(struct fragment)); > > + if (!seg) { > > + return NULL; > > + } > > + seg->url = av_strdup(seg_ptr->url); > > + if (!seg->url) { > > + av_free(seg); > > + return NULL; > > + } > > + seg->size = seg_ptr->size; > > + seg->url_offset = seg_ptr->url_offset; > > + return seg; > > + } > > + } > > + if (c->is_live) { > > + while (1) { > > + min_seq_no = calc_min_seg_no(pls->parent, pls); > > + max_seq_no = calc_max_seg_no(pls->parent, pls); > > + > > + if (pls->cur_seq_no <= min_seq_no) { > > + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: > cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", > > + (int64_t)pls->cur_seq_no, min_seq_no, > max_seq_no, (int)pls->rep_idx); > > + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls); > > + } else if (pls->cur_seq_no > max_seq_no) { > > + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: > min[%"PRId64"] max[%"PRId64"], playlist %d\n", > > + min_seq_no, max_seq_no, (int)pls->rep_idx); > > + av_usleep(1000); > > + continue; > > + } > > + break; > > + } > > + seg = av_mallocz(sizeof(struct fragment)); > > + if (!seg) { > > + return NULL; > > + } > > + } else if (pls->cur_seq_no <= pls->last_seq_no) { > > + seg = av_mallocz(sizeof(struct fragment)); > > + if (!seg) { > > + return NULL; > > + } > > + } > > + if (seg) { > > + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) { > > + int64_t tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER > ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no); > > + tmp_str = av_asprintf(pls->url_template, (int64_t)tmp_val); > > Still no. Do not use ANY printf-family function with any user input as the > format-string argument. > Can you give some suggestion to make similar function: av_asprintf(pls->url_template, (int64_t)tmp_val); the url_template is looks like " chunk-stream0-%lld.m4s". > Also, the cast here doesn't make sense. > > > + seg->url = av_strdup(tmp_str); > > + if (!seg->url) { > > + av_free(tmp_str); > > + return NULL; > > + } > > + } else { > > + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to > resolve template url '%s'\n", pls->url_template); > > + seg->url = av_strdup(pls->url_template); > > + if (!seg->url) { > > + return NULL; > > + } > > + } > > + seg->size = -1; > > + } > > + > > + av_free(tmp_str); > > + return seg; > > +} > > + > > +enum ReadFromURLMode { > > + READ_NORMAL, > > + READ_COMPLETE, > > +}; > > + > > +static int read_from_url(struct representation *pls, struct fragment > *seg, > > + uint8_t *buf, int buf_size, > > + enum ReadFromURLMode mode) > > +{ > > + int ret; > > + > > + /* limit read if the fragment was only a part of a file */ > > + if (seg->size >= 0) > > + buf_size = FFMIN(buf_size, pls->cur_seg_size - > pls->cur_seg_offset); > > + > > + if (mode == READ_COMPLETE) { > > + ret = avio_read(pls->input, buf, buf_size); > > + if (ret < buf_size) { > > + av_log(pls->parent, AV_LOG_WARNING, "Could not read > complete fragment.\n"); > > + } > > + } else { > > + ret = avio_read(pls->input, buf, buf_size); > > + } > > + if (ret > 0) > > + pls->cur_seg_offset += ret; > > + > > + return ret; > > +} > > + > > +static int open_input(DASHContext *c, struct representation *pls, > struct fragment *seg) > > +{ > > + AVDictionary *opts = NULL; > > + char url[MAX_URL_SIZE]; > > + int ret; > > + > > + // broker prior HTTP options that should be consistent across > requests > > + av_dict_set(&opts, "user-agent", c->user_agent, 0); > > + av_dict_set(&opts, "cookies", c->cookies, 0); > > + av_dict_set(&opts, "headers", c->headers, 0); > > + if (c->is_live) { > > + av_dict_set(&opts, "seekable", "0", 0); > > + } > > + > > + if (seg->size >= 0) { > > + /* try to restrict the HTTP request to the part we want > > + * (if this is in fact a HTTP request) */ > > + av_dict_set_int(&opts, "offset", seg->url_offset, 0); > > + av_dict_set_int(&opts, "end_offset", seg->url_offset + > seg->size, 0); > > + } > > + > > + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url); > > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', > offset %"PRId64", playlist %d\n", > > + url, seg->url_offset, pls->rep_idx); > > + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, > NULL); > > + if (ret < 0) { > > + goto cleanup; > > + } > > + > > + /* Seek to the requested position. If this was a HTTP request, the > offset > > + * should already be where want it to, but this allows e.g. local > testing > > + * without a HTTP server. */ > > + if (!ret && seg->url_offset) { > > + int64_t seekret = avio_seek(pls->input, seg->url_offset, > SEEK_SET); > > + if (seekret < 0) { > > + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset > %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url); > > + ret = (int) seekret; > > + ff_format_io_close(pls->parent, &pls->input); > > + } > > + } > > + > > +cleanup: > > + av_dict_free(&opts); > > + pls->cur_seg_offset = 0; > > + pls->cur_seg_size = seg->size; > > + return ret; > > +} > > + > > +static int update_init_section(struct representation *pls) > > +{ > > + static const int max_init_section_size = 1024*1024; > > + DASHContext *c = pls->parent->priv_data; > > + int64_t sec_size = 0; > > + int64_t urlsize = 0; > > + int ret = 0; > > + > > + /* read init section only once per representation */ > > + if (!pls->init_section || pls->init_sec_buf) { > > + return 0; > > + } > > + > > + ret = open_input(c, pls, pls->init_section); > > + if (ret < 0) { > > + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an > initialization section in playlist %d\n", pls->rep_idx); > > + return ret; > > + } > > + > > + if (pls->init_section->size >= 0) { > > + sec_size = pls->init_section->size; > > + } else if ((urlsize = avio_size(pls->input)) >= 0) { > > + sec_size = urlsize; > > + } else { > > + sec_size = max_init_section_size; > > + } > > + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization > section of size %"PRId64"\n", sec_size); > > + sec_size = FFMIN(sec_size, max_init_section_size); > > + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, > sec_size); > > + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, > pls->init_sec_buf_size, READ_COMPLETE); > > + ff_format_io_close(pls->parent, &pls->input); > > + if (ret < 0) > > + return ret; > > + > > + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) { > > + uint8_t **stsd_entries = NULL; > > + int *stsd_entries_size = NULL; > > + int i = 4; > > + > > + while (i <= (ret - 4)) { > > + // find start stsd atom > > + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) { > > + /* 1B version > > + * 3B flags > > + * 4B num of entries */ > > + int stsd_first_offset = i + 8; > > + int stsd_offset = 0; > > + int j = 0; > > + uint32_t stsd_count = AV_RB32(pls->init_sec_buf + > stsd_first_offset); > > + stsd_first_offset += 4; > > + if (stsd_count != pls->rep_count) { > > + i++; > > + continue; > > + } > > + // find all stsd entries > > + stsd_entries = av_mallocz_array(stsd_count, > sizeof(*stsd_entries)); > > + stsd_entries_size = av_mallocz_array(stsd_count, > sizeof(*stsd_entries_size)); > > + for (j = 0; j < stsd_count; ++j) { > > + /* 4B - size > > + * 4B - format */ > > + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + > stsd_first_offset + stsd_offset); > > + stsd_entries[j] = av_malloc(stsd_entries_size[j]); > > + memcpy(stsd_entries[j], pls->init_sec_buf + > stsd_first_offset + stsd_offset, stsd_entries_size[j]); > > + stsd_offset += stsd_entries_size[j]; > > + } > > + // reorder stsd entries > > + // as first put stsd entry for current representation > > + j = pls->rep_idx; > > + stsd_offset = stsd_first_offset; > > + memcpy(pls->init_sec_buf + stsd_offset, > stsd_entries[j], stsd_entries_size[j]); > > + stsd_offset += stsd_entries_size[j]; > > + for (j = 0; j < stsd_count; ++j) { > > + if (j != pls->rep_idx) { > > + memcpy(pls->init_sec_buf + stsd_offset, > stsd_entries[j], stsd_entries_size[j]); > > + stsd_offset += stsd_entries_size[j]; > > + } > > + av_free(stsd_entries[j]); > > + } > > + av_freep(&stsd_entries); > > + av_freep(&stsd_entries_size); > > + break; > > + } > > + i++; > > + } > > + } > > + > > + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section > size[%d]\n", pls, (int)ret); > > + pls->init_sec_data_len = ret; > > + pls->init_sec_buf_read_offset = 0; > > + > > + return 0; > > +} > > + > > +static int64_t seek_data(void *opaque, int64_t offset, int whence) > > +{ > > + struct representation *v = opaque; > > + if (v->n_fragments && !v->init_sec_data_len) { > > + return avio_seek(v->input, offset, whence); > > + } > > + > > + return AVERROR(ENOSYS); > > +} > > + > > +static int read_data(void *opaque, uint8_t *buf, int buf_size) > > +{ > > + int ret = 0; > > + struct representation *v = opaque; > > + DASHContext *c = v->parent->priv_data; > > + > > +restart: > > + if (!v->input) { > > + free_fragment(&v->cur_seg); > > + v->cur_seg = get_current_fragment(v); > > + if (!v->cur_seg) { > > + ret = AVERROR_EOF; > > + goto end; > > + } > > + > > + /* load/update Media Initialization Section, if any */ > > + ret = update_init_section(v); > > + if (ret) > > + goto end; > > + > > + ret = open_input(c, v, v->cur_seg); > > + if (ret < 0) { > > + if (ff_check_interrupt(c->interrupt_callback)) { > > + goto end; > > + ret = AVERROR_EXIT; > > + } > > + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment > of playlist %d\n", v->rep_idx); > > + v->cur_seq_no++; > > + goto restart; > > + } > > + } > > + > > + if (v->init_sec_buf_read_offset < v->init_sec_data_len) { > > + /* Push init section out first before first actual fragment */ > > + int copy_size = FFMIN(v->init_sec_data_len - > v->init_sec_buf_read_offset, buf_size); > > + memcpy(buf, v->init_sec_buf, copy_size); > > + v->init_sec_buf_read_offset += copy_size; > > + ret = copy_size; > > + goto end; > > + } > > + > > + /* check the v->cur_seg, if it is null, get current and double > check if the new v->cur_seg*/ > > + if (!v->cur_seg) { > > + v->cur_seg = get_current_fragment(v); > > + } > > + if (!v->cur_seg) { > > + ret = AVERROR_EOF; > > + goto end; > > + } > > + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL); > > + if (ret > 0) > > + goto end; > > + ff_format_io_close(v->parent, &v->input); > > + v->cur_seq_no++; > > + goto restart; > > + > > +end: > > + return ret; > > +} > > + > > +static int save_avio_options(AVFormatContext *s) > > +{ > > + DASHContext *c = s->priv_data; > > + const char *opts[] = { "headers", "user_agent", "user-agent", > "cookies", NULL }, **opt = opts; > > + uint8_t *buf = NULL; > > + int ret = 0; > > + > > + while (*opt) { > > + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) > { > > + if (buf) { > > + ret = av_dict_set(&c->avio_opts, *opt, buf, > AV_DICT_DONT_STRDUP_VAL); > > + if (ret < 0) > > + return ret; > > + } > > + } > > + opt++; > > + } > > + > > + return ret; > > +} > > + > > +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const > char *url, > > + int flags, AVDictionary **opts) > > +{ > > + av_log(s, AV_LOG_ERROR, > > + "A HDS playlist item '%s' referred to an external file '%s'. > " > > + "Opening this file was forbidden for security reasons\n", > > + s->filename, url); > > + return AVERROR(EPERM); > > +} > > + > > +static int reopen_demux_for_component(AVFormatContext *s, struct > representation *pls) > > +{ > > + DASHContext *c = s->priv_data; > > + AVInputFormat *in_fmt = NULL; > > + AVDictionary *in_fmt_opts = NULL; > > + uint8_t *avio_ctx_buffer = NULL; > > + int ret = 0; > > + > > + if (pls->ctx) { > > + /* note: the internal buffer could have changed, and be != > avio_ctx_buffer */ > > + av_freep(&pls->pb.buffer); > > + memset(&pls->pb, 0x00, sizeof(AVIOContext)); > > + pls->ctx->pb = NULL; > > + avformat_close_input(&pls->ctx); > > + pls->ctx = NULL; > > + } > > + if (!(pls->ctx = avformat_alloc_context())) { > > + ret = AVERROR(ENOMEM); > > + goto fail; > > + } > > + > > + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE); > > + if (!avio_ctx_buffer ){ > > + ret = AVERROR(ENOMEM); > > + avformat_free_context(pls->ctx); > > + pls->ctx = NULL; > > + goto fail; > > + } > > + if (c->is_live) { > > + ffio_init_context(&pls->pb, avio_ctx_buffer , > INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL); > > + } else { > > + ffio_init_context(&pls->pb, avio_ctx_buffer , > INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data); > > + } > > + pls->pb.seekable = 0; > > + > > + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0) > > + goto fail; > > + > > + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO; > > + pls->ctx->probesize = 1024 * 4; > > + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE; > > + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0); > > + if (ret < 0) { > > + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, > playlist %d\n", (int)pls->rep_idx); > > + avformat_free_context(pls->ctx); > > + pls->ctx = NULL; > > + goto fail; > > + } > > + > > + pls->ctx->pb = &pls->pb; > > + pls->ctx->io_open = nested_io_open; > > + > > + // provide additional information from mpd if available > > + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); > //pls->init_section->url > > + av_dict_free(&in_fmt_opts); > > + if (ret < 0) > > + goto fail; > > + if (pls->n_fragments) { > > + ret = avformat_find_stream_info(pls->ctx, NULL); > > + if (ret < 0) > > + goto fail; > > + } > > + > > +fail: > > + return ret; > > +} > > + > > +static int open_demux_for_component(AVFormatContext *s, struct > representation *pls) > > +{ > > + int ret = 0; > > + int i; > > + > > + pls->parent = s; > > + pls->cur_seq_no = calc_cur_seg_no(s, pls); > > + pls->last_seq_no = calc_max_seg_no(s, pls); > > + > > + ret = reopen_demux_for_component(s, pls); > > + if (ret < 0) { > > + goto fail; > > + } > > + for (i = 0; i < pls->ctx->nb_streams; i++) { > > + AVStream *st = avformat_new_stream(s, NULL); > > + AVStream *ist = pls->ctx->streams[i]; > > + if (!st) { > > + ret = AVERROR(ENOMEM); > > + goto fail; > > + } > > + st->id = i; > > + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]-> > codecpar); > > + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, > ist->time_base.den); > > + } > > + > > + return 0; > > +fail: > > + return ret; > > +} > > + > > +static int dash_read_header(AVFormatContext *s) > > +{ > > + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > > + DASHContext *c = s->priv_data; > > + int ret = 0; > > + int stream_index = 0; > > + > > + c->interrupt_callback = &s->interrupt_callback; > > + // if the URL context is good, read important options we must > broker later > > + if (u) { > > + update_options(&c->user_agent, "user-agent", u); > > + update_options(&c->cookies, "cookies", u); > > + update_options(&c->headers, "headers", u); > > + } > > + > > + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0) > > + goto fail; > > + > > + if ((ret = save_avio_options(s)) < 0) > > + goto fail; > > + > > + /* If this isn't a live stream, fill the total duration of the > > + * stream. */ > > + if (!c->is_live) { > > + s->duration = (int64_t) c->media_presentation_duration_sec * > AV_TIME_BASE; > > + } > > + > > + /* Open the demuxer for curent video and current audio components > if available */ > > + if (!ret && c->cur_video) { > > + ret = open_demux_for_component(s, c->cur_video); > > + if (!ret) { > > + c->cur_video->stream_index = stream_index; > > + ++stream_index; > > + } else { > > + free_representation(c->cur_video); > > + c->cur_video = NULL; > > + } > > + } > > + > > + if (!ret && c->cur_audio) { > > + ret = open_demux_for_component(s, c->cur_audio); > > + if (!ret) { > > + c->cur_audio->stream_index = stream_index; > > + ++stream_index; > > + } else { > > + free_representation(c->cur_audio); > > + c->cur_audio = NULL; > > + } > > + } > > + > > + if (!stream_index) { > > + ret = AVERROR_INVALIDDATA; > > + goto fail; > > + } > > + > > + /* Create a program */ > > + if (!ret) { > > + AVProgram *program; > > + program = av_new_program(s, 0); > > + if (!program) { > > + goto fail; > > + } > > + > > + if (c->cur_video) { > > + av_program_add_stream_index(s, 0, > c->cur_video->stream_index); > > + } > > + > > + if (c->cur_audio) { > > + av_program_add_stream_index(s, 0, > c->cur_audio->stream_index); > > + } > > + } > > + > > + return 0; > > +fail: > > + return ret; > > +} > > + > > +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt) > > +{ > > + DASHContext *c = s->priv_data; > > + int ret = 0; > > + struct representation *cur = NULL; > > + > > + if (!c->cur_audio && !c->cur_video) { > > + return AVERROR_INVALIDDATA; > > + } > > + if (c->cur_audio && !c->cur_video) { > > + cur = c->cur_audio; > > + } else if (!c->cur_audio && c->cur_video) { > > + cur = c->cur_video; > > + } else if (c->cur_video->cur_timestamp < > c->cur_audio->cur_timestamp) { > > + cur = c->cur_video; > > + } else { > > + cur = c->cur_audio; > > + } > > + > > + if (cur->ctx) { > > + ret = av_read_frame(cur->ctx, &cur->pkt); > > + if (ret < 0) { > > + av_packet_unref(&cur->pkt); > > + } else { > > + /* If we got a packet, return it */ > > + *pkt = cur->pkt; > > + cur->cur_timestamp = av_rescale(pkt->pts, > (int64_t)cur->ctx->streams[0]->time_base.num * 90000, > cur->ctx->streams[0]->time_base.den); > > + pkt->stream_index = cur->stream_index; > > + reset_packet(&cur->pkt); > > + return 0; > > + } > > + } > > + return AVERROR_EOF; > > +} > > + > > +static int dash_close(AVFormatContext *s) > > +{ > > + DASHContext *c = s->priv_data; > > + > > + if (c->cur_audio) { > > + free_representation(c->cur_audio); > > + } > > + > > + if (c->cur_video) { > > + free_representation(c->cur_video); > > + } > > + > > + av_freep(&c->cookies); > > + av_freep(&c->user_agent); > > + av_dict_free(&c->avio_opts); > > + av_freep(&c->base_url); > > + return 0; > > +} > > + > > +static int dash_seek(AVFormatContext *s, struct representation *pls, > int64_t seek_pos_msec, int flags) > > +{ > > + int ret = 0; > > + int i = 0; > > + int j = 0; > > + int64_t duration = 0; > > + > > + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], > playlist %d\n", seek_pos_msec, pls->rep_idx); > > + > > + // single fragment mode > > + if (pls->n_fragments) { > > + pls->cur_timestamp = 0; > > + pls->cur_seg_offset = 0; > > + ff_read_frame_flush(pls->ctx); > > + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags); > > + } > > + > > + if (pls->input) > > + ff_format_io_close(pls->parent, &pls->input); > > + > > + // find the nearest fragment > > + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) { > > + int64_t num = pls->first_seq_no; > > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with > SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist > %d.\n", > > + (int)pls->n_timelines, (int64_t)pls->last_seq_no, > (int)pls->rep_idx); > > + for (i = 0; i < pls->n_timelines; i++) { > > + if (pls->timelines[i]->t > 0) { > > + duration = pls->timelines[i]->t; > > + } > > + duration += pls->timelines[i]->d; > > + if (seek_pos_msec < ((duration * 1000) / > pls->fragment_timescale)) { > > + goto set_seq_num; > > + } > > + for (j = 0; j < pls->timelines[i]->r; j++) { > > + duration += pls->timelines[i]->d; > > + num++; > > + if (seek_pos_msec < ((duration * 1000) / > pls->fragment_timescale)) { > > + goto set_seq_num; > > + } > > + } > > + num++; > > + } > > + > > +set_seq_num: > > + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : > num; > > + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with > SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n", > > + (int64_t)pls->cur_seq_no, (int)pls->rep_idx); > > + } else if (pls->fragment_duration > 0) { > > + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * > pls->fragment_timescale) / pls->fragment_duration) / 1000; > > + } else { > > + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing > fragment_duration\n"); > > + pls->cur_seq_no = pls->first_seq_no; > > + } > > + pls->cur_timestamp = 0; > > + pls->cur_seg_offset = 0; > > + pls->init_sec_buf_read_offset = 0; > > + ret = reopen_demux_for_component(s, pls); > > + > > + return ret; > > +} > > + > > +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t > timestamp, int flags) > > +{ > > + int ret = 0; > > + DASHContext *c = s->priv_data; > > + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000, > > + s->streams[stream_index]-> > time_base.den, > > + flags & AVSEEK_FLAG_BACKWARD ? > > + AV_ROUND_DOWN : AV_ROUND_UP); > > + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live) > > + return AVERROR(ENOSYS); > > + if (c->cur_audio) { > > + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags); > > + } > > + if (!ret && c->cur_video) { > > + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags); > > + } > > + return ret; > > +} > > + > > +static int dash_probe(AVProbeData *p) > > +{ > > + if (!av_stristr(p->buf, "<MPD")) > > + return 0; > > + > > + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") || > > + av_stristr(p->buf, "dash:profile:isoff-live:2011") || > > + av_stristr(p->buf, "dash:profile:isoff-live:2012") || > > + av_stristr(p->buf, "dash:profile:isoff-main:2011")) { > > + return AVPROBE_SCORE_MAX; > > + } > > + if (av_stristr(p->buf, "dash:profile")) { > > + return AVPROBE_SCORE_MAX >> 1; > > + } > > + > > + return 0; > > +} > > + > > +#define OFFSET(x) offsetof(DASHContext, x) > > +#define FLAGS AV_OPT_FLAG_DECODING_PARAM > > +static const AVOption dash_options[] = { > > + {"audio_rep_index", "audio representation index to be used", > OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, > FLAGS}, > > + {"video_rep_index", "video representation index to be used", > OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, > FLAGS}, > > + {NULL} > > +}; > > + > > +static const AVClass dash_class = { > > + .class_name = "dash", > > + .item_name = av_default_item_name, > > + .option = dash_options, > > + .version = LIBAVUTIL_VERSION_INT, > > +}; > > + > > +AVInputFormat ff_dash_demuxer = { > > + .name = "dash", > > + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming > over HTTP"), > > + .priv_class = &dash_class, > > + .priv_data_size = sizeof(DASHContext), > > + .read_probe = dash_probe, > > + .read_header = dash_read_header, > > + .read_packet = dash_read_packet, > > + .read_close = dash_close, > > + .read_seek = dash_read_seek, > > + .flags = AVFMT_NO_BYTE_SEEK, > > +}; > > -- > > 2.10.1 (Apple Git-78) > > > > > > > > _______________________________________________ > > ffmpeg-devel mailing list > > ffmpeg-devel@ffmpeg.org > > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >
> On Mar 22, 2017, at 09:31, Steven Liu <lingjiujianke@gmail.com> wrote: > > 2017-03-22 22:01 GMT+08:00 Rodger Combs <rodger.combs@gmail.com <mailto:rodger.combs@gmail.com>>: > >> >>> On Mar 21, 2017, at 08:16, Steven Liu <lq@chinaffmpeg.org> wrote: >>> >>> v2 fixed: >>> 1. from autodetect to disabled >>> 2. from camelCase code style to ffmpeg code style >>> 3. from RepType to AVMediaType >>> 4. fix variable typo >>> 5. change time value from uint32_t to uint64_t >>> 6. removed be used once API >>> 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and >> av_timegm >>> 8. merge complex free operation to free_fragment >>> 9. use API from snprintf to av_asprintf >>> >>> v3 fixed: >>> 1. fix typo from --enabled-xml2 to --enable-xml2 >>> >>> v4 fixed: >>> 1. from --enable-xml2 to --enable-libxml2 >>> 2. move system includes to top >>> 3. remove nouse includes >>> 4. rename enum name >>> 5. add a trailing comma for the last entry enum >>> 6. fix comment typo >>> 7. add const to DASHContext class front >>> 8. check sscanf if return arguments and give warning message when error >>> 9. check validity before free seg->url and seg >>> 10. check if the val is null, before use atoll >>> >>> v5 fixed: >>> 1. fix typo from mainifest to manifest >>> >>> v6 fixed: >>> 1. from realloc to av_realloc >>> 2. from free to av_free >>> >>> Reviewed-by: Clément Bœsch <u@pkh.me> >>> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> >>> Reviewed-by: Carl Eugen Hoyos <cehoyos@ag.or.at> >>> Reviewed-by: Rodger Combs <rodger.combs@gmail.com> >>> Reviewed-by: Moritz Barsnick <barsnick@gmx.net> >>> Reviewed-by: Nicolas George <george@nsup.org> >>> Reviewed-by: Ricardo Constantino <wiiaboo@gmail.com> >>> Signed-off-by: Steven Liu <lq@chinaffmpeg.org> >>> --- >>> configure | 4 + >>> libavformat/Makefile | 1 + >>> libavformat/allformats.c | 2 +- >>> libavformat/dashdec.c | 1841 ++++++++++++++++++++++++++++++ >> ++++++++++++++++ >>> 4 files changed, 1847 insertions(+), 1 deletion(-) >>> create mode 100644 libavformat/dashdec.c >>> >>> diff --git a/configure b/configure >>> index 4eb116b..86d16a8 100755 >>> --- a/configure >>> +++ b/configure >>> @@ -273,6 +273,7 @@ External library support: >>> --enable-libxcb-shape enable X11 grabbing shape rendering >> [autodetect] >>> --enable-libxvid enable Xvid encoding via xvidcore, >>> native MPEG-4/Xvid encoder exists [no] >>> + --enable-libxml2 enable XML parsing using the C library >> libxml2 [no] >>> --enable-libzimg enable z.lib, needed for zscale filter [no] >>> --enable-libzmq enable message passing via libzmq [no] >>> --enable-libzvbi enable teletext support via libzvbi [no] >>> @@ -1590,6 +1591,7 @@ EXTERNAL_LIBRARY_LIST=" >>> libvpx >>> libwavpack >>> libwebp >>> + libxml2 >>> libzimg >>> libzmq >>> libzvbi >>> @@ -2920,6 +2922,7 @@ avi_muxer_select="riffenc" >>> caf_demuxer_select="iso_media riffdec" >>> caf_muxer_select="iso_media" >>> dash_muxer_select="mp4_muxer" >>> +dash_demuxer_deps="libxml2" >>> dirac_demuxer_select="dirac_parser" >>> dts_demuxer_select="dca_parser" >>> dtshd_demuxer_select="dca_parser" >>> @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config >> openssl openssl/ssl.h OPENSSL_init >>> check_lib openssl/ssl.h SSL_library_init >> -lssl -lcrypto -lws2_32 -lgdi32 || >>> die "ERROR: openssl not found"; } >>> enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || >> disable qtkit_indev; } >>> +enabled libxml2 && require_pkg_config libxml-2.0 >> libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 >>> >>> # libdc1394 check >>> if enabled libdc1394; then >>> diff --git a/libavformat/Makefile b/libavformat/Makefile >>> index f56ef16..d77ffaa 100644 >>> --- a/libavformat/Makefile >>> +++ b/libavformat/Makefile >>> @@ -134,6 +134,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o >>> OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o >>> OBJS-$(CONFIG_DATA_MUXER) += rawenc.o >>> OBJS-$(CONFIG_DASH_MUXER) += dashenc.o >>> +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o >>> OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o >>> OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o >>> OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o >>> diff --git a/libavformat/allformats.c b/libavformat/allformats.c >>> index 09e62c3..d57314b 100644 >>> --- a/libavformat/allformats.c >>> +++ b/libavformat/allformats.c >>> @@ -96,7 +96,7 @@ static void register_all(void) >>> REGISTER_DEMUXER (CINE, cine); >>> REGISTER_DEMUXER (CONCAT, concat); >>> REGISTER_MUXER (CRC, crc); >>> - REGISTER_MUXER (DASH, dash); >>> + REGISTER_MUXDEMUX(DASH, dash); >>> REGISTER_MUXDEMUX(DATA, data); >>> REGISTER_MUXDEMUX(DAUD, daud); >>> REGISTER_DEMUXER (DCSTR, dcstr); >>> diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c >>> new file mode 100644 >>> index 0000000..e0be85e >>> --- /dev/null >>> +++ b/libavformat/dashdec.c >>> @@ -0,0 +1,1841 @@ >>> +/* >>> + * Dynamic Adaptive Streaming over HTTP demux >>> + * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux >>> + * Copyright (c) 2017 Steven Liu >>> + * >>> + * This file is part of FFmpeg. >>> + * >>> + * FFmpeg is free software; you can redistribute it and/or >>> + * modify it under the terms of the GNU Lesser General Public >>> + * License as published by the Free Software Foundation; either >>> + * version 2.1 of the License, or (at your option) any later version. >>> + * >>> + * FFmpeg is distributed in the hope that it will be useful, >>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of >>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU >>> + * Lesser General Public License for more details. >>> + * >>> + * You should have received a copy of the GNU Lesser General Public >>> + * License along with FFmpeg; if not, write to the Free Software >>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA >> 02110-1301 USA >>> + */ >>> +#include <libxml/parser.h> >>> +#include "libavutil/intreadwrite.h" >>> +#include "libavutil/opt.h" >>> +#include "libavutil/time.h" >>> +#include "libavutil/parseutils.h" >>> +#include "internal.h" >>> +#include "avio_internal.h" >>> + >>> +#define INITIAL_BUFFER_SIZE 32768 >>> + >>> +struct fragment { >>> + int64_t url_offset; >>> + int64_t size; >>> + char *url; >>> +}; >>> + >>> +/* >>> + * reference to : ISO_IEC_23009-1-DASH-2012 >>> + * Section: 5.3.9.6.2 >>> + * Table: Table 17 — Semantics of SegmentTimeline element >>> + * */ >>> +struct timeline { >>> + /* t: Element or Attribute Name >>> + * specifies the MPD start time, in @timescale units, >>> + * the first Segment in the series starts relative to the beginning >> of the Period. >>> + * The value of this attribute must be equal to or greater than the >> sum of the previous S >>> + * element earliest presentation time and the sum of the contiguous >> Segment durations. >>> + * If the value of the attribute is greater than what is expressed >> by the previous S element, >>> + * it expresses discontinuities in the timeline. >>> + * If not present then the value shall be assumed to be zero for >> the first S element >>> + * and for the subsequent S elements, the value shall be assumed to >> be the sum of >>> + * the previous S element's earliest presentation time and >> contiguous duration >>> + * (i.e. previous S@t + @d * (@r + 1)). >>> + * */ >>> + int64_t t; >>> + /* r: Element or Attribute Name >>> + * specifies the repeat count of the number of following contiguous >> Segments with >>> + * the same duration expressed by the value of @d. This value is >> zero-based >>> + * (e.g. a value of three means four Segments in the contiguous >> series). >>> + * */ >>> + int32_t r; >>> + /* d: Element or Attribute Name >>> + * specifies the Segment duration, in units of the value of the >> @timescale. >>> + * */ >>> + int64_t d; >>> +}; >>> + >>> +enum DASHTmplUrlType { >>> + TMP_URL_TYPE_UNSPECIFIED, >>> + TMP_URL_TYPE_NUMBER, >>> + TMP_URL_TYPE_TIME, >>> +}; >>> + >>> +/* >>> + * Each playlist has its own demuxer. If it is currently active, >>> + * it has an opened AVIOContext too, and potentially an AVPacket >>> + * containing the next packet from this stream. >>> + */ >>> +struct representation { >>> + char *url_template; >>> + enum DASHTmplUrlType tmp_url_type; >>> + AVIOContext pb; >>> + AVIOContext *input; >>> + AVFormatContext *parent; >>> + AVFormatContext *ctx; >>> + AVPacket pkt; >>> + int rep_idx; >>> + int rep_count; >>> + int stream_index; >>> + >>> + enum AVMediaType type; >>> + int64_t target_duration; >>> + >>> + int n_fragments; >>> + struct fragment **fragments; /* VOD list of fragment for profile */ >>> + >>> + int n_timelines; >>> + struct timeline **timelines; >>> + >>> + int64_t first_seq_no; >>> + int64_t last_seq_no; >>> + >>> + int64_t fragment_duration; >>> + int64_t fragment_timescale; >>> + >>> + int64_t cur_seq_no; >>> + int64_t cur_seg_offset; >>> + int64_t cur_seg_size; >>> + struct fragment *cur_seg; >>> + >>> + /* Currently active Media Initialization Section */ >>> + struct fragment *init_section; >>> + uint8_t *init_sec_buf; >>> + uint32_t init_sec_buf_size; >>> + uint32_t init_sec_data_len; >>> + uint32_t init_sec_buf_read_offset; >>> + int fix_multiple_stsd_order; >>> + int64_t cur_timestamp; >>> +}; >>> + >>> +typedef struct DASHContext { >>> + const AVClass *class; >>> + char *base_url; >>> + struct representation *cur_video; >>> + struct representation *cur_audio; >>> + uint64_t media_presentation_duration_sec; >>> + uint64_t suggested_presentation_delay_sec; >>> + uint64_t presentation_delay_sec; >>> + uint64_t availability_start_time_sec; >>> + uint64_t publish_time_sec; >>> + uint64_t minimum_update_period_sec; >>> + uint64_t time_shift_buffer_depth_sec; >>> + uint64_t min_buffer_time_sec; >>> + uint64_t period_duration_sec; >>> + uint64_t period_start_sec; >>> + int is_live; >>> + int audio_rep_index; >>> + int video_rep_index; >>> + AVIOInterruptCB *interrupt_callback; >>> + char *user_agent; ///< holds HTTP user agent set >> as an AVOption to the HTTP protocol context >>> + char *cookies; ///< holds HTTP cookie values >> set in either the initial response or as an AVOption to the HTTP protocol >> context >>> + char *headers; ///< holds HTTP headers set as >> an AVOption to the HTTP protocol context >>> + AVDictionary *avio_opts; >>> +} DASHContext; >>> + >>> +static uint64_t GetCurrentTimeInSec(void) >>> +{ >>> + return av_gettime() / 1000000; >>> +} >>> + >>> +static uint64_t GetUTCDateTimeInSec(AVFormatContext *s, const char >> *datetime) >>> +{ >>> + struct tm timeinfo; >>> + int year = 0; >>> + int month = 0; >>> + int day = 0; >>> + int hour = 0; >>> + int minute = 0; >>> + int ret = 0; >>> + float second = 0.0; >>> + >>> + /* ISO-8601 date parser */ >>> + if (!datetime) >>> + return 0; >>> + >>> + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, >> &hour, &minute, &second); >>> + /* year, month, day, hour, minute, second 6 arguments */ >>> + if (ret != 6) { >>> + av_log(s, AV_LOG_WARNING, "GetUTCDateTimeInSec get a wrong time >> format\n"); >>> + // return 0; /* parser error */ >>> + } >>> + timeinfo.tm_year = year - 1900; >>> + timeinfo.tm_mon = month - 1; >>> + timeinfo.tm_mday = day; >>> + timeinfo.tm_hour = hour; >>> + timeinfo.tm_min = minute; >>> + timeinfo.tm_sec = (int)second; >>> + >>> + return av_timegm(&timeinfo); >>> +} >>> + >>> +static uint32_t GetDurationInSec(AVFormatContext *s, const char >> *duration) >>> +{ >>> + /* ISO-8601 duration parser */ >>> + uint32_t days = 0; >>> + uint32_t hours = 0; >>> + uint32_t mins = 0; >>> + uint32_t secs = 0; >>> + uint32_t size = 0; >>> + float value = 0; >>> + uint8_t type = 0; >>> + const char *ptr = duration; >>> + >>> + while (*ptr) { >>> + if (*ptr == 'P' || *ptr == 'T') { >>> + ptr++; >>> + continue; >>> + } >>> + >>> + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) { >>> + av_log(s, AV_LOG_WARNING, "GetDurationInSec get a wrong >> time format\n"); >>> + return 0; /* parser error */ >>> + } >>> + switch (type) { >>> + case 'D': >>> + days = (uint32_t)value; >>> + break; >>> + case 'H': >>> + hours = (uint32_t)value; >>> + break; >>> + case 'M': >>> + mins = (uint32_t)value; >>> + break; >>> + case 'S': >>> + secs = (uint32_t)value; >>> + break; >>> + default: >>> + // handle invalid type >>> + break; >>> + } >>> + ptr += size; >>> + } >>> + return ((days * 24 + hours) * 60 + mins) * 60 + secs; >>> +} >>> + >>> +static void free_fragment(struct fragment **seg) >>> +{ >>> + if (!(*seg)) { >>> + return; >>> + } >>> + av_freep(&(*seg)->url); >>> + av_freep(seg); >>> +} >>> + >>> +static void free_fragment_list(struct representation *pls) >>> +{ >>> + int i; >>> + >>> + for (i = 0; i < pls->n_fragments; i++) { >>> + free_fragment(&pls->fragments[i]); >>> + } >>> + av_freep(&pls->fragments); >>> + pls->n_fragments = 0; >>> +} >>> + >>> +static void free_timelines_list(struct representation *pls) >>> +{ >>> + int i; >>> + >>> + for (i = 0; i < pls->n_timelines; i++) { >>> + av_freep(&pls->timelines[i]); >>> + } >>> + av_freep(&pls->timelines); >>> + pls->n_timelines = 0; >>> +} >>> + >>> +/* >>> + * Used to reset a statically allocated AVPacket to a clean slate, >>> + * containing no data. >>> + */ >>> +static void reset_packet(AVPacket *pkt) >>> +{ >>> + av_init_packet(pkt); >>> + pkt->data = NULL; >>> +} >>> + >>> +static void free_representation(struct representation *pls) >>> +{ >>> + free_fragment_list(pls); >>> + free_timelines_list(pls); >>> + free_fragment(&pls->cur_seg); >>> + free_fragment(&pls->init_section); >>> + av_freep(&pls->init_sec_buf); >>> + av_packet_unref(&pls->pkt); >>> + reset_packet(&pls->pkt); >>> + av_freep(&pls->pb.buffer); >>> + if (pls->input) >>> + ff_format_io_close(pls->parent, &pls->input); >>> + if (pls->ctx) { >>> + pls->ctx->pb = NULL; >>> + avformat_close_input(&pls->ctx); >>> + } >>> + >>> + av_free(pls->url_template); >>> + av_free(pls); >>> +} >>> + >>> +static void update_options(char **dest, const char *name, void *src) >>> +{ >>> + av_freep(dest); >>> + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest); >>> + if (*dest) >>> + av_freep(dest); >>> +} >>> + >>> +static int open_url(AVFormatContext *s, AVIOContext **pb, const char >> *url, >>> + AVDictionary *opts, AVDictionary *opts2, int >> *is_http) >>> +{ >>> + DASHContext *c = s->priv_data; >>> + AVDictionary *tmp = NULL; >>> + const char *proto_name = NULL; >>> + int ret; >>> + >>> + av_dict_copy(&tmp, opts, 0); >>> + av_dict_copy(&tmp, opts2, 0); >>> + >>> + if (av_strstart(url, "crypto", NULL)) { >>> + if (url[6] == '+' || url[6] == ':') >>> + proto_name = avio_find_protocol_name(url + 7); >>> + } >>> + >>> + if (!proto_name) >>> + proto_name = avio_find_protocol_name(url); >>> + >>> + if (!proto_name) >>> + return AVERROR_INVALIDDATA; >>> + >>> + // only http(s) & file are allowed >>> + if (!av_strstart(proto_name, "http", NULL) && >> !av_strstart(proto_name, "file", NULL)) >>> + return AVERROR_INVALIDDATA; >>> + if (!strncmp(proto_name, url, strlen(proto_name)) && >> url[strlen(proto_name)] == ':') >>> + ; >>> + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, >> url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') >>> + ; >>> + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) >>> + return AVERROR_INVALIDDATA; >>> + >>> + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp); >>> + if (ret >= 0) { >>> + // update cookies on http response with setcookies. >>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; >>> + update_options(&c->cookies, "cookies", u); >>> + av_dict_set(&opts, "cookies", c->cookies, 0); >>> + } >>> + >>> + av_dict_free(&tmp); >>> + >>> + if (is_http) >>> + *is_http = av_strstart(proto_name, "http", NULL); >>> + >>> + return ret; >>> + >>> +} >>> + >>> +static char *strreplace(const char *str, const char *from, const char >> *to) >>> +{ >>> + /* Adjust each of the below values to suit your needs. */ >>> + /* Increment positions cache size initially by this number. */ >>> + size_t cache_sz_inc = 16; >>> + /* Thereafter, each time capacity needs to be increased, >>> + * multiply the increment by this factor. */ >>> + const size_t cache_sz_inc_factor = 3; >>> + /* But never increment capacity by more than this number. */ >>> + const size_t cache_sz_inc_max = 1048576; >>> + >>> + char *pret, *ret = NULL; >>> + const char *pstr2, *pstr = str; >>> + size_t i, count = 0; >>> + uintptr_t *pos_cache_tmp, *pos_cache = NULL; >>> + size_t cache_sz = 0; >>> + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from); >>> + >>> + /* Find all matches and cache their positions. */ >>> + while ((pstr2 = av_stristr(pstr, from))) { >>> + count++; >>> + /* Increase the cache size when necessary. */ >>> + if (cache_sz < count) { >>> + cache_sz += cache_sz_inc; >>> + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) * >> cache_sz); >>> + if (!pos_cache_tmp) { >>> + goto end_strreplace; >>> + } else pos_cache = pos_cache_tmp; >>> + cache_sz_inc *= cache_sz_inc_factor; >>> + if (cache_sz_inc > cache_sz_inc_max) { >>> + cache_sz_inc = cache_sz_inc_max; >>> + } >>> + } >>> + >>> + pos_cache[count-1] = pstr2 - str; >>> + pstr = pstr2 + fromlen; >>> + } >>> + orglen = pstr - str + strlen(pstr); >>> + /* Allocate memory for the post-replacement string. */ >>> + if (count > 0) { >>> + tolen = strlen(to); >>> + retlen = orglen + (tolen - fromlen) * count; >>> + } else { >>> + retlen = orglen; >>> + } >>> + ret = av_malloc(retlen + 1); >>> + if (!ret) { >>> + goto end_strreplace; >>> + } >>> + >>> + if (!count) { >>> + /* If no matches, then just duplicate the string. */ >>> + av_strlcpy(ret, str, retlen + 1); >>> + } else { >>> + /* Otherwise, duplicate the string whilst performing >>> + * the replacements using the position cache. */ >>> + pret = ret; >>> + memcpy(pret, str, pos_cache[0]); >>> + pret += pos_cache[0]; >>> + for (i = 0; i < count; i++) { >>> + memcpy(pret, to, tolen); >>> + pret += tolen; >>> + pstr = str + pos_cache[i] + fromlen; >>> + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) - >> pos_cache[i] - fromlen; >>> + memcpy(pret, pstr, cpylen); >>> + pret += cpylen; >>> + } >>> + ret[retlen] = '\0'; >>> + } >>> + >>> +end_strreplace: >>> + /* Free the cache and return the post-replacement string, >>> + * which will be NULL in the event of an error. */ >>> + av_free(pos_cache); >>> + return ret; >>> +} >>> + >>> +static char *replace_template_str(const char *url, const char *marker) >>> +{ >>> + char *prefix = NULL; >>> + char *start = 0; >>> + char *end = NULL; >>> + char *tmp_url = NULL; >>> + char *new_url = NULL; >>> + int marker_len; >>> + >>> + prefix = av_strdup(marker); >>> + marker_len = strlen(prefix) - 1; >>> + prefix[marker_len] = '\0'; >>> + >>> + start = av_stristr(url, prefix); >>> + if (!start) >>> + goto finish; >>> + end = strchr(start + 1, '$'); >>> + if (!end) >>> + goto finish; >>> + >>> + if (start[marker_len] != '%') >>> + goto finish; >>> + >>> + if (end[-1] != 'd') >>> + goto finish; >>> + >>> + tmp_url = av_mallocz(MAX_URL_SIZE); >>> + if (!tmp_url) { >>> + return NULL; >>> + } >>> + >>> + av_strlcpy(tmp_url, url, start - url+ 1); >>> + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end - >> start - marker_len); >>> + av_strlcat(tmp_url, PRId64, MAX_URL_SIZE); >>> + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE); >>> + >>> +finish: >>> + av_free(prefix); >>> + new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64); >>> + av_free(tmp_url); >>> + return new_url; >>> +} >>> + >>> +static char *get_content_url(xmlNodePtr *baseurl_nodes, int >> n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar >> *val) >>> +{ >>> + int i; >>> + xmlChar *text; >>> + char *url = NULL; >>> + char *tmp_str = av_mallocz(MAX_URL_SIZE); >>> + char *tmp_str_2 = NULL; >>> + >>> + if (!tmp_str) { >>> + return NULL; >>> + } >>> + for (i = 0; i < n_baseurl_nodes; ++i) { >>> + if (baseurl_nodes[i] && baseurl_nodes[i]->children && >> baseurl_nodes[i]->children->type == XML_TEXT_NODE) { >>> + text = xmlNodeGetContent(baseurl_nodes[i]->children); >>> + if (text) { >>> + tmp_str_2 = av_mallocz(MAX_URL_SIZE); >>> + if (!tmp_str_2) { >>> + av_free(tmp_str); >>> + return NULL; >>> + } >>> + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, >> text); >>> + av_free(tmp_str); >>> + tmp_str = tmp_str_2; >>> + xmlFree(text); >>> + } >>> + } >>> + } >>> + if (val) >>> + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE); >>> + if (rep_id_val) { >>> + url = strreplace(tmp_str, "$RepresentationID$", (const >> char*)rep_id_val); >>> + av_free(tmp_str); >>> + tmp_str = url; >>> + } >>> + if (rep_bandwidth_val && tmp_str) >>> + url = strreplace(tmp_str, "$Bandwidth$", (const >> char*)rep_bandwidth_val); >>> + if (tmp_str != url) >>> + av_free(tmp_str); >>> + return url; >>> +} >>> + >>> +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int >> n_nodes, const xmlChar *attrname) >>> +{ >>> + int i; >>> + xmlChar *val; >>> + >>> + for (i = 0; i < n_nodes; ++i) { >>> + if (nodes[i]) { >>> + val = xmlGetProp(nodes[i], attrname); >>> + if (val) >>> + return val; >>> + } >>> + } >>> + >>> + return NULL; >>> +} >>> + >>> +static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const >> xmlChar *nodename) >>> +{ >>> + xmlNodePtr node = rootnode; >>> + if (!node) { >>> + return NULL; >>> + } >>> + >>> + node = xmlFirstElementChild(node); >>> + while (node) { >>> + if (!xmlStrcmp(node->name, nodename)) { >>> + return node; >>> + } >>> + node = xmlNextElementSibling(node); >>> + } >>> + return NULL; >>> +} >>> + >>> +static enum AVMediaType get_content_type(xmlNodePtr node) >>> +{ >>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; >>> + int i = 0; >>> + const char *attr; >>> + >>> + if (node) { >>> + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) { >>> + attr = (i) ? "mimeType" : "contentType"; >>> + xmlChar *val = xmlGetProp(node, attr); >>> + if (val) { >>> + if (av_stristr((const char *)val, "video")) { >>> + type = AVMEDIA_TYPE_VIDEO; >>> + } else if (av_stristr((const char *)val, "audio")) { >>> + type = AVMEDIA_TYPE_AUDIO; >>> + } >>> + xmlFree(val); >>> + } >>> + i++; >>> + } >>> + } >>> + return type; >>> +} >>> + >>> +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct >> representation *rep, >>> + xmlNodePtr fragmenturl_node, >>> + xmlNodePtr *baseurl_nodes, >>> + xmlChar *rep_id_val, >>> + xmlChar *rep_bandwidth_val) >>> +{ >>> + xmlChar *initialization_val = NULL; >>> + xmlChar *media_val = NULL; >>> + >>> + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar >> *)"Initialization")) { >>> + initialization_val = xmlGetProp(fragmenturl_node, "sourceURL"); >>> + if (initialization_val) { >>> + rep->init_section = av_mallocz(sizeof(struct fragment)); >>> + if (!rep->init_section) { >>> + xmlFree(initialization_val); >>> + return AVERROR(ENOMEM); >>> + } >>> + rep->init_section->url = get_content_url(baseurl_nodes, 4, >> rep_id_val, rep_bandwidth_val, initialization_val); >>> + rep->init_section->size = -1; >>> + xmlFree(initialization_val); >>> + } >>> + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar >> *)"SegmentURL")) { >>> + media_val = xmlGetProp(fragmenturl_node, "media"); >>> + if (media_val) { >>> + struct fragment *seg = av_mallocz(sizeof(struct fragment)); >>> + if (!seg) { >>> + xmlFree(media_val); >>> + return AVERROR(ENOMEM); >>> + } >>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, >> rep_bandwidth_val, media_val); >>> + seg->size = -1; >>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg); >>> + xmlFree(media_val); >>> + } >>> + } >>> + >>> + return 0; >>> +} >>> + >>> +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct >> representation *rep, >>> + xmlNodePtr >> fragment_timeline_node) >>> +{ >>> + xmlAttrPtr attr = NULL; >>> + xmlChar *val = NULL; >>> + >>> + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar >> *)"S")) { >>> + struct timeline *tml = av_mallocz(sizeof(struct timeline)); >>> + if (!tml) { >>> + return AVERROR(ENOMEM); >>> + } >>> + attr = fragment_timeline_node->properties; >>> + while (attr) { >>> + val = xmlGetProp(fragment_timeline_node, attr->name); >>> + >>> + if (!val) { >>> + av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline >> attr->name = %s val is NULL\n", attr->name); >>> + continue; >>> + } >>> + >>> + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) { >>> + tml->t = (int64_t)atoll((const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) { >>> + tml->r =(int32_t) atoi((const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) { >>> + tml->d = (int64_t)atoll((const char *)val); >>> + rep->fragment_duration = (int64_t) atoll((const char >> *)val); >>> + } >>> + attr = attr->next; >>> + xmlFree(val); >>> + } >>> + dynarray_add(&rep->timelines, &rep->n_timelines, tml); >>> + } >>> + >>> + return 0; >>> +} >>> + >>> +static int parse_manifest_representation(AVFormatContext *s, const >> char *url, >>> + xmlNodePtr node, >>> + xmlNodePtr adaptionset_node, >>> + xmlNodePtr mpd_baseurl_node, >>> + xmlNodePtr >> period_baseurl_node, >>> + xmlNodePtr >> fragment_template_node, >>> + xmlNodePtr >> content_component_node, >>> + xmlNodePtr >> adaptionset_baseurl_node) >>> +{ >>> + int32_t ret = 0; >>> + int32_t audio_rep_idx = 0; >>> + int32_t video_rep_idx = 0; >>> + char *temp_string = NULL; >>> + DASHContext *c = s->priv_data; >>> + struct representation *rep = NULL; >>> + struct fragment *seg = NULL; >>> + xmlNodePtr representation_segmenttemplate_node = NULL; >>> + xmlNodePtr representation_baseurl_node = NULL; >>> + xmlNodePtr representation_segmentlist_node = NULL; >>> + xmlNodePtr fragment_timeline_node = NULL; >>> + xmlNodePtr fragment_templates_tab[2]; >>> + xmlChar *duration_val = NULL; >>> + xmlChar *startnumber_val = NULL; >>> + xmlChar *timescale_val = NULL; >>> + xmlChar *initialization_val = NULL; >>> + xmlChar *media_val = NULL; >>> + xmlNodePtr baseurl_nodes[4]; >>> + xmlNodePtr representation_node = node; >>> + xmlChar *rep_id_val = xmlGetProp(representation_node, "id"); >>> + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, >> "bandwidth"); >>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; >>> + >>> + // try get information from representation >>> + if (type == AVMEDIA_TYPE_UNKNOWN) >>> + type = get_content_type(representation_node); >>> + // try get information from contentComponen >>> + if (type == AVMEDIA_TYPE_UNKNOWN) >>> + type = get_content_type(content_component_node); >>> + // try get information from adaption set >>> + if (type == AVMEDIA_TYPE_UNKNOWN) >>> + type = get_content_type(adaptionset_node); >>> + if (type == AVMEDIA_TYPE_UNKNOWN) { >>> + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported >> representation type\n", url); >>> + } else if ((type == AVMEDIA_TYPE_VIDEO && ((c->video_rep_index < 0 >> && !c->cur_video) || >>> + video_rep_idx == >> (int32_t)c->video_rep_index )) || >>> + (type == AVMEDIA_TYPE_AUDIO && ((c->audio_rep_index < 0 >> && !c->cur_audio) || >>> + audio_rep_idx == >> (int32_t)c->audio_rep_index ))) { >>> + // convert selected representation to our internal struct >>> + rep = av_mallocz(sizeof(struct representation)); >>> + if (!rep) { >>> + ret = AVERROR(ENOMEM); >>> + goto end; >>> + } >>> + representation_segmenttemplate_node = findChildNodeByName(representation_node, >> "SegmentTemplate"); >>> + representation_baseurl_node = findChildNodeByName(representation_node, >> "BaseURL"); >>> + representation_segmentlist_node = findChildNodeByName(representation_node, >> "SegmentList"); >>> + reset_packet(&rep->pkt); >>> + >>> + baseurl_nodes[0] = mpd_baseurl_node; >>> + baseurl_nodes[1] = period_baseurl_node; >>> + baseurl_nodes[2] = adaptionset_baseurl_node; >>> + baseurl_nodes[3] = representation_baseurl_node; >>> + >>> + if (representation_segmenttemplate_node || >> fragment_template_node) { >>> + fragment_timeline_node = NULL; >>> + fragment_templates_tab[0] = representation_ >> segmenttemplate_node; >>> + fragment_templates_tab[1] = fragment_template_node; >>> + >>> + duration_val = get_val_from_nodes_tab(fragment_templates_tab, >> 2, "duration"); >>> + startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, >> 2, "startNumber"); >>> + timescale_val = get_val_from_nodes_tab(fragment_templates_tab, >> 2, "timescale"); >>> + initialization_val = get_val_from_nodes_tab(fragment_templates_tab, >> 2, "initialization"); >>> + media_val = get_val_from_nodes_tab(fragment_templates_tab, >> 2, "media"); >>> + >>> + if (initialization_val) { >>> + rep->init_section = av_mallocz(sizeof(struct fragment)); >>> + if (!rep->init_section) { >>> + av_free(rep); >>> + ret = AVERROR(ENOMEM); >>> + goto end; >>> + } >>> + rep->init_section->url = get_content_url(baseurl_nodes, >> 4, rep_id_val, rep_bandwidth_val, initialization_val); >>> + rep->init_section->size = -1; >>> + xmlFree(initialization_val); >>> + } >>> + >>> + if (media_val) { >>> + temp_string = get_content_url(baseurl_nodes, 4, >> rep_id_val, rep_bandwidth_val, media_val); >>> + if (temp_string) { >>> + if (av_stristr(temp_string, "$Number")) { >>> + rep->url_template = replace_template_str(temp_string, >> "$Number$"); >>> + /* A URL template is provided from which >> clients build a chunk list >>> + * where the chunk URLs include chunk numbers >> (like index numbers). >>> + */ >>> + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* >> Number-Based. */ >>> + } else if (av_stristr(temp_string, "$Time")) { >>> + rep->url_template = replace_template_str(temp_string, >> "$Time$"); >>> + /* A URL template is provided from which >> clients build a chunk list >>> + * where the chunk URLs include chunk start >> times. >>> + */ >>> + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* >> Time-Based. */ >>> + } else { >>> + rep->url_template = temp_string; >>> + temp_string = NULL; >>> + } >>> + av_free(temp_string); >>> + } >>> + xmlFree(media_val); >>> + } >>> + if (duration_val) { >>> + rep->fragment_duration = (int64_t) atoll((const char >> *)duration_val); >>> + xmlFree(duration_val); >>> + } >>> + if (timescale_val) { >>> + rep->fragment_timescale = (int64_t) atoll((const char >> *)timescale_val); >>> + xmlFree(timescale_val); >>> + } >>> + if (startnumber_val) { >>> + rep->first_seq_no = (int64_t) atoll((const char >> *)startnumber_val); >>> + xmlFree(startnumber_val); >>> + } >>> + >>> + fragment_timeline_node = findChildNodeByName( >> representation_segmenttemplate_node, "SegmentTimeline"); >>> + >>> + if (!fragment_timeline_node) >>> + fragment_timeline_node = findChildNodeByName(fragment_template_node, >> "SegmentTimeline"); >>> + if (fragment_timeline_node) { >>> + fragment_timeline_node = xmlFirstElementChild(fragment_ >> timeline_node); >>> + while (fragment_timeline_node) { >>> + ret = parse_manifest_segmenttimeline(s, rep, >> fragment_timeline_node); >>> + if (ret < 0) { >>> + return ret; >>> + } >>> + fragment_timeline_node = xmlNextElementSibling( >> fragment_timeline_node); >>> + } >>> + } >>> + } else if (representation_baseurl_node && >> !representation_segmentlist_node) { >>> + seg = av_mallocz(sizeof(struct fragment)); >>> + if (!seg) { >>> + ret = AVERROR(ENOMEM); >>> + goto end; >>> + } >>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, >> rep_bandwidth_val, NULL); >>> + seg->size = -1; >>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg); >>> + } else if (!representation_baseurl_node && >> representation_segmentlist_node) { >>> + // TODO: https://www.brendanlong.com/ >> the-structure-of-an-mpeg-dash-mpd.html >>> + // http://www-itec.uni-klu.ac.at/ >> dash/ddash/mpdGenerator.php?fragmentlength=15&type=full >>> + xmlNodePtr fragmenturl_node = NULL; >>> + duration_val = xmlGetProp(representation_segmentlist_node, >> "duration"); >>> + timescale_val = xmlGetProp(representation_segmentlist_node, >> "timescale"); >>> + if (duration_val) { >>> + rep->fragment_duration = (int64_t) atoll((const char >> *)duration_val); >>> + xmlFree(duration_val); >>> + } >>> + if (timescale_val) { >>> + rep->fragment_timescale = (int64_t) atoll((const char >> *)timescale_val); >>> + xmlFree(timescale_val); >>> + } >>> + fragmenturl_node = xmlFirstElementChild( >> representation_segmentlist_node); >>> + while (fragmenturl_node) { >>> + ret = parse_manifest_segmenturlnode(s, rep, >> fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val); >>> + if (ret < 0) { >>> + return ret; >>> + } >>> + fragmenturl_node = xmlNextElementSibling( >> fragmenturl_node); >>> + } >>> + } else { >>> + free_representation(rep); >>> + rep = NULL; >>> + av_log(s, AV_LOG_ERROR, "Unknown format of Representation >> node id[%s] \n", (const char *)rep_id_val); >>> + } >>> + >>> + if (rep) { >>> + if (rep->fragment_duration > 0 && !rep->fragment_timescale) >>> + rep->fragment_timescale = 1; >>> + if (type == AVMEDIA_TYPE_VIDEO) { >>> + rep->rep_idx = video_rep_idx; >>> + c->cur_video = rep; >>> + } else { >>> + rep->rep_idx = audio_rep_idx; >>> + c->cur_audio = rep; >>> + } >>> + } >>> + } >>> + >>> + video_rep_idx += type == AVMEDIA_TYPE_VIDEO; >>> + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO; >>> + >>> +end: >>> + if (rep_id_val) >>> + xmlFree(rep_id_val); >>> + if (rep_bandwidth_val) >>> + xmlFree(rep_bandwidth_val); >>> + >>> + return ret; >>> +} >>> + >>> +static int parse_manifest_adaptationset(AVFormatContext *s, const char >> *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr >> period_baseurl_node) >>> +{ >>> + int ret = 0; >>> + xmlNodePtr fragment_template_node = NULL; >>> + xmlNodePtr content_component_node = NULL; >>> + xmlNodePtr adaptionset_baseurl_node = NULL; >>> + xmlNodePtr node = NULL; >>> + >>> + node = xmlFirstElementChild(adaptionset_node); >>> + while (node) { >>> + if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) >> { >>> + fragment_template_node = node; >>> + } else if (!xmlStrcmp(node->name, (const xmlChar >> *)"ContentComponent")) { >>> + content_component_node = node; >>> + } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) { >>> + adaptionset_baseurl_node = node; >>> + } else if (!xmlStrcmp(node->name, (const xmlChar >> *)"Representation")) { >>> + ret = parse_manifest_representation(s, url, node, >>> + adaptionset_node, >>> + mpd_baseurl_node, >>> + period_baseurl_node, >>> + fragment_template_node, >>> + content_component_node, >>> + >> adaptionset_baseurl_node); >>> + if (ret < 0) { >>> + return ret; >>> + } >>> + } >>> + node = xmlNextElementSibling(node); >>> + } >>> + return 0; >>> +} >>> + >>> + >>> +static int parse_manifest(AVFormatContext *s, const char *url, >> AVIOContext *in) >>> +{ >>> + DASHContext *c = s->priv_data; >>> + int ret = 0; >>> + int close_in = 0; >>> + uint8_t *new_url = NULL; >>> + int64_t filesize = 0; >>> + char *buffer = NULL; >>> + AVDictionary *opts = NULL; >>> + xmlDoc *doc = NULL; >>> + xmlNodePtr root_element = NULL; >>> + xmlNodePtr node = NULL; >>> + xmlNodePtr period_node = NULL; >>> + xmlNodePtr mpd_baseurl_node = NULL; >>> + xmlNodePtr period_baseurl_node = NULL; >>> + xmlNodePtr adaptionset_node = NULL; >>> + xmlAttrPtr attr = NULL; >>> + xmlChar *val = NULL; >>> + uint32_t perdiod_duration_sec = 0; >>> + uint32_t perdiod_start_sec = 0; >>> + int32_t audio_rep_idx = 0; >>> + int32_t video_rep_idx = 0; >>> + >>> + if (!in) { >>> + close_in = 1; >>> + /* This is XML manifest there is no need to set range header */ >>> + av_dict_set(&opts, "seekable", "0", 0); >>> + // broker prior HTTP options that should be consistent across >> requests >>> + av_dict_set(&opts, "user-agent", c->user_agent, 0); >>> + av_dict_set(&opts, "cookies", c->cookies, 0); >>> + av_dict_set(&opts, "headers", c->headers, 0); >>> + >>> + ret = avio_open2(&in, url, AVIO_FLAG_READ, >> c->interrupt_callback, &opts); >>> + av_dict_free(&opts); >>> + if (ret < 0) >>> + return ret; >>> + } >>> + >>> + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= >> 0) { >>> + c->base_url = av_strdup(new_url); >>> + } else { >>> + c->base_url = av_strdup(url); >>> + } >>> + >>> + filesize = avio_size(in); >>> + if (filesize <= 0){ >>> + filesize = 8 * 1024; >>> + } >>> + >>> + buffer = av_mallocz(filesize); >>> + if (!buffer) { >>> + return AVERROR(ENOMEM); >>> + } >>> + >>> + filesize = avio_read(in, buffer, filesize); >>> + if (filesize > 0) { >>> + LIBXML_TEST_VERSION >>> + >>> + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0); >>> + root_element = xmlDocGetRootElement(doc); >>> + node = root_element; >>> + >>> + if (!node) { >>> + ret = AVERROR_INVALIDDATA; >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing >> root node\n", url); >>> + goto cleanup; >>> + } >>> + >>> + if (node->type != XML_ELEMENT_NODE || >>> + xmlStrcmp(node->name, (const xmlChar *)"MPD")) { >>> + ret = AVERROR_INVALIDDATA; >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root >> node name[%s] type[%d]\n", url, node->name, (int)node->type); >>> + goto cleanup; >>> + } >>> + >>> + val = xmlGetProp(node, "type"); >>> + if (!val) { >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing >> type attrib\n", url); >>> + ret = AVERROR_INVALIDDATA; >>> + goto cleanup; >>> + } >>> + if (!xmlStrcmp(val, (const xmlChar *)"dynamic")) >>> + c->is_live = 1; >>> + xmlFree(val); >>> + >>> + attr = node->properties; >>> + while (attr) { >>> + val = xmlGetProp(node, attr->name); >>> + >>> + if (!xmlStrcmp(attr->name, (const xmlChar >> *)"availabilityStartTime")) { >>> + c->availability_start_time_sec = GetUTCDateTimeInSec(s, >> (const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"publishTime")) { >>> + c->publish_time_sec = GetUTCDateTimeInSec(s, (const >> char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"minimumUpdatePeriod")) { >>> + c->minimum_update_period_sec = GetDurationInSec(s, >> (const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"timeShiftBufferDepth")) { >>> + c->time_shift_buffer_depth_sec = GetDurationInSec(s, >> (const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"minBufferTime")) { >>> + c->min_buffer_time_sec = GetDurationInSec(s, (const >> char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"suggestedPresentationDelay")) { >>> + c->suggested_presentation_delay_sec = >> GetDurationInSec(s, (const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"mediaPresentationDuration")) { >>> + c->media_presentation_duration_sec = >> GetDurationInSec(s, (const char *)val); >>> + } >>> + attr = attr->next; >>> + xmlFree(val); >>> + } >>> + >>> + mpd_baseurl_node = findChildNodeByName(node, "BaseURL"); >>> + >>> + // at now we can handle only one period, with the longest >> duration >>> + node = xmlFirstElementChild(node); >>> + while (node) { >>> + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) { >>> + perdiod_duration_sec = 0; >>> + perdiod_start_sec = 0; >>> + attr = node->properties; >>> + while (attr) { >>> + val = xmlGetProp(node, attr->name); >>> + if (!xmlStrcmp(attr->name, (const xmlChar >> *)"duration")) { >>> + perdiod_duration_sec = GetDurationInSec(s, >> (const char *)val); >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar >> *)"start")) { >>> + perdiod_start_sec = GetDurationInSec(s, (const >> char *)val); >>> + } >>> + attr = attr->next; >>> + xmlFree(val); >>> + } >>> + if ((perdiod_duration_sec) >= (c->period_duration_sec)) >> { >>> + period_node = node; >>> + c->period_duration_sec = perdiod_duration_sec; >>> + c->period_start_sec = perdiod_start_sec; >>> + if (c->period_start_sec > 0) >>> + c->media_presentation_duration_sec = >> c->period_duration_sec; >>> + } >>> + } >>> + node = xmlNextElementSibling(node); >>> + } >>> + if (!period_node) { >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing >> Period node\n", url); >>> + ret = AVERROR_INVALIDDATA; >>> + goto cleanup; >>> + } >>> + // explore AdaptationSet >>> + adaptionset_node = xmlFirstElementChild(period_node); >>> + while (adaptionset_node) { >>> + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar >> *)"BaseURL")) { >>> + period_baseurl_node = adaptionset_node; >>> + } else if (!xmlStrcmp(adaptionset_node->name, (const >> xmlChar *)"AdaptationSet")) { >>> + parse_manifest_adaptationset(s, url, adaptionset_node, >> mpd_baseurl_node, period_baseurl_node); >>> + } >>> + adaptionset_node = xmlNextElementSibling(adaptionset_node); >>> + } >>> + if (c->cur_video) { >>> + c->cur_video->rep_count = video_rep_idx; >>> + c->cur_video->fix_multiple_stsd_order = 1; >>> + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", >> (int)c->cur_video->rep_idx); >>> + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", >> (int)video_rep_idx); >>> + } >>> + if (c->cur_audio) { >>> + c->cur_audio->rep_count = audio_rep_idx; >>> + } >>> + >>> +cleanup: >>> + /*free the document */ >>> + xmlFreeDoc(doc); >>> + xmlCleanupParser(); >>> + } else { >>> + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url); >>> + ret = AVERROR_INVALIDDATA; >>> + } >>> + >>> + av_free(new_url); >>> + av_free(buffer); >>> + if (close_in) { >>> + avio_close(in); >>> + } >>> + return ret; >>> +} >>> + >>> +static int64_t calc_cur_seg_no(AVFormatContext *s, struct >> representation *pls) >>> +{ >>> + DASHContext *c = pls->parent->priv_data; >>> + int64_t num = 0; >>> + >>> + if (c->is_live) { >>> + if (!pls->fragment_duration) { >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration >> value in live mode\n"); >>> + return pls->first_seq_no; >>> + } >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() - >> c->availability_start_time_sec) - c->presentation_delay_sec) * >> pls->fragment_timescale) / pls->fragment_duration; >>> + } else { >>> + num = pls->first_seq_no; >>> + } >>> + return num; >>> +} >>> + >>> +static int64_t calc_min_seg_no(AVFormatContext *s, struct >> representation *pls) >>> +{ >>> + DASHContext *c = pls->parent->priv_data; >>> + int64_t num = 0; >>> + >>> + if (c->is_live) { >>> + if (!pls->fragment_duration) { >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration >> value in live mode\n"); >>> + return pls->first_seq_no; >>> + } >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() - >> c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) * >> pls->fragment_timescale) / pls->fragment_duration; >>> + } else { >>> + num = pls->first_seq_no; >>> + } >>> + return num; >>> +} >>> + >>> +static int64_t calc_max_seg_no(AVFormatContext *s, struct >> representation *pls) >>> +{ >>> + DASHContext *c = pls->parent->priv_data; >>> + int64_t num = 0; >>> + int64_t i = 0; >>> + >>> + if (c->is_live) { >>> + if (!pls->fragment_duration) { >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration >> value in live mode\n"); >>> + return pls->first_seq_no; >>> + } >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() - >> c->availability_start_time_sec)) * pls->fragment_timescale) / >> pls->fragment_duration; >>> + } else { >>> + if (pls->n_fragments) { >>> + num = pls->first_seq_no + pls->n_fragments - 1; >>> + } else if (pls->n_timelines) { >>> + num = pls->first_seq_no + pls->n_timelines - 1; >>> + for (i = 0; i < pls->n_timelines; ++i) { >>> + num += pls->timelines[i]->r; >>> + } >>> + } else { >>> + num = pls->first_seq_no + (c->media_presentation_duration_sec >> * pls->fragment_timescale) / pls->fragment_duration; >>> + } >>> + } >>> + >>> + return num; >>> +} >>> + >>> +static int64_t get_fragment_start_time(struct representation *pls, >> int64_t cur_seq_no) >>> +{ >>> + int64_t i = 0; >>> + int64_t j = 0; >>> + int64_t num = 0; >>> + int64_t startTime = 0; >>> + >>> + if (pls->n_timelines) { >>> + for (i = 0; i < pls->n_timelines; ++i) { >>> + if (pls->timelines[i]->t > 0) { >>> + startTime = pls->timelines[i]->t; >>> + } >>> + if (num == cur_seq_no) >>> + goto finish; >>> + startTime += pls->timelines[i]->d; >>> + for (j = 0; j < pls->timelines[i]->r; ++j) { >>> + num++; >>> + if (num == cur_seq_no) >>> + goto finish; >>> + startTime += pls->timelines[i]->d; >>> + } >>> + num++; >>> + } >>> + } >>> + >>> +finish: >>> + return startTime; >>> +} >>> + >>> +static struct fragment *get_current_fragment(struct representation *pls) >>> +{ >>> + int64_t min_seq_no = 0; >>> + int64_t max_seq_no = 0; >>> + char *tmp_str = NULL; >>> + struct fragment *seg = NULL; >>> + struct fragment *seg_ptr = NULL; >>> + DASHContext *c = pls->parent->priv_data; >>> + >>> + if (pls->n_fragments > 0) { >>> + if (pls->cur_seq_no < pls->n_fragments) { >>> + seg_ptr = pls->fragments[pls->cur_seq_no]; >>> + seg = av_mallocz(sizeof(struct fragment)); >>> + if (!seg) { >>> + return NULL; >>> + } >>> + seg->url = av_strdup(seg_ptr->url); >>> + if (!seg->url) { >>> + av_free(seg); >>> + return NULL; >>> + } >>> + seg->size = seg_ptr->size; >>> + seg->url_offset = seg_ptr->url_offset; >>> + return seg; >>> + } >>> + } >>> + if (c->is_live) { >>> + while (1) { >>> + min_seq_no = calc_min_seg_no(pls->parent, pls); >>> + max_seq_no = calc_max_seg_no(pls->parent, pls); >>> + >>> + if (pls->cur_seq_no <= min_seq_no) { >>> + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: >> cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", >>> + (int64_t)pls->cur_seq_no, min_seq_no, >> max_seq_no, (int)pls->rep_idx); >>> + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls); >>> + } else if (pls->cur_seq_no > max_seq_no) { >>> + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: >> min[%"PRId64"] max[%"PRId64"], playlist %d\n", >>> + min_seq_no, max_seq_no, (int)pls->rep_idx); >>> + av_usleep(1000); >>> + continue; >>> + } >>> + break; >>> + } >>> + seg = av_mallocz(sizeof(struct fragment)); >>> + if (!seg) { >>> + return NULL; >>> + } >>> + } else if (pls->cur_seq_no <= pls->last_seq_no) { >>> + seg = av_mallocz(sizeof(struct fragment)); >>> + if (!seg) { >>> + return NULL; >>> + } >>> + } >>> + if (seg) { >>> + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) { >>> + int64_t tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER >> ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no); >>> + tmp_str = av_asprintf(pls->url_template, (int64_t)tmp_val); >> >> Still no. Do not use ANY printf-family function with any user input as the >> format-string argument. >> > Can you give some suggestion to make similar function: > av_asprintf(pls->url_template, > (int64_t)tmp_val); the url_template is looks like " > chunk-stream0-%lld.m4s". Delay the strreplace call until get_current_fragment, and rather than replacing with a printf formatter, just insert the actual value at that point. > >> Also, the cast here doesn't make sense. >> >>> + seg->url = av_strdup(tmp_str); >>> + if (!seg->url) { >>> + av_free(tmp_str); >>> + return NULL; >>> + } >>> + } else { >>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to >> resolve template url '%s'\n", pls->url_template); >>> + seg->url = av_strdup(pls->url_template); >>> + if (!seg->url) { >>> + return NULL; >>> + } >>> + } >>> + seg->size = -1; >>> + } >>> + >>> + av_free(tmp_str); >>> + return seg; >>> +} >>> + >>> +enum ReadFromURLMode { >>> + READ_NORMAL, >>> + READ_COMPLETE, >>> +}; >>> + >>> +static int read_from_url(struct representation *pls, struct fragment >> *seg, >>> + uint8_t *buf, int buf_size, >>> + enum ReadFromURLMode mode) >>> +{ >>> + int ret; >>> + >>> + /* limit read if the fragment was only a part of a file */ >>> + if (seg->size >= 0) >>> + buf_size = FFMIN(buf_size, pls->cur_seg_size - >> pls->cur_seg_offset); >>> + >>> + if (mode == READ_COMPLETE) { >>> + ret = avio_read(pls->input, buf, buf_size); >>> + if (ret < buf_size) { >>> + av_log(pls->parent, AV_LOG_WARNING, "Could not read >> complete fragment.\n"); >>> + } >>> + } else { >>> + ret = avio_read(pls->input, buf, buf_size); >>> + } >>> + if (ret > 0) >>> + pls->cur_seg_offset += ret; >>> + >>> + return ret; >>> +} >>> + >>> +static int open_input(DASHContext *c, struct representation *pls, >> struct fragment *seg) >>> +{ >>> + AVDictionary *opts = NULL; >>> + char url[MAX_URL_SIZE]; >>> + int ret; >>> + >>> + // broker prior HTTP options that should be consistent across >> requests >>> + av_dict_set(&opts, "user-agent", c->user_agent, 0); >>> + av_dict_set(&opts, "cookies", c->cookies, 0); >>> + av_dict_set(&opts, "headers", c->headers, 0); >>> + if (c->is_live) { >>> + av_dict_set(&opts, "seekable", "0", 0); >>> + } >>> + >>> + if (seg->size >= 0) { >>> + /* try to restrict the HTTP request to the part we want >>> + * (if this is in fact a HTTP request) */ >>> + av_dict_set_int(&opts, "offset", seg->url_offset, 0); >>> + av_dict_set_int(&opts, "end_offset", seg->url_offset + >> seg->size, 0); >>> + } >>> + >>> + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url); >>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', >> offset %"PRId64", playlist %d\n", >>> + url, seg->url_offset, pls->rep_idx); >>> + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, >> NULL); >>> + if (ret < 0) { >>> + goto cleanup; >>> + } >>> + >>> + /* Seek to the requested position. If this was a HTTP request, the >> offset >>> + * should already be where want it to, but this allows e.g. local >> testing >>> + * without a HTTP server. */ >>> + if (!ret && seg->url_offset) { >>> + int64_t seekret = avio_seek(pls->input, seg->url_offset, >> SEEK_SET); >>> + if (seekret < 0) { >>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset >> %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url); >>> + ret = (int) seekret; >>> + ff_format_io_close(pls->parent, &pls->input); >>> + } >>> + } >>> + >>> +cleanup: >>> + av_dict_free(&opts); >>> + pls->cur_seg_offset = 0; >>> + pls->cur_seg_size = seg->size; >>> + return ret; >>> +} >>> + >>> +static int update_init_section(struct representation *pls) >>> +{ >>> + static const int max_init_section_size = 1024*1024; >>> + DASHContext *c = pls->parent->priv_data; >>> + int64_t sec_size = 0; >>> + int64_t urlsize = 0; >>> + int ret = 0; >>> + >>> + /* read init section only once per representation */ >>> + if (!pls->init_section || pls->init_sec_buf) { >>> + return 0; >>> + } >>> + >>> + ret = open_input(c, pls, pls->init_section); >>> + if (ret < 0) { >>> + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an >> initialization section in playlist %d\n", pls->rep_idx); >>> + return ret; >>> + } >>> + >>> + if (pls->init_section->size >= 0) { >>> + sec_size = pls->init_section->size; >>> + } else if ((urlsize = avio_size(pls->input)) >= 0) { >>> + sec_size = urlsize; >>> + } else { >>> + sec_size = max_init_section_size; >>> + } >>> + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization >> section of size %"PRId64"\n", sec_size); >>> + sec_size = FFMIN(sec_size, max_init_section_size); >>> + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, >> sec_size); >>> + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, >> pls->init_sec_buf_size, READ_COMPLETE); >>> + ff_format_io_close(pls->parent, &pls->input); >>> + if (ret < 0) >>> + return ret; >>> + >>> + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) { >>> + uint8_t **stsd_entries = NULL; >>> + int *stsd_entries_size = NULL; >>> + int i = 4; >>> + >>> + while (i <= (ret - 4)) { >>> + // find start stsd atom >>> + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) { >>> + /* 1B version >>> + * 3B flags >>> + * 4B num of entries */ >>> + int stsd_first_offset = i + 8; >>> + int stsd_offset = 0; >>> + int j = 0; >>> + uint32_t stsd_count = AV_RB32(pls->init_sec_buf + >> stsd_first_offset); >>> + stsd_first_offset += 4; >>> + if (stsd_count != pls->rep_count) { >>> + i++; >>> + continue; >>> + } >>> + // find all stsd entries >>> + stsd_entries = av_mallocz_array(stsd_count, >> sizeof(*stsd_entries)); >>> + stsd_entries_size = av_mallocz_array(stsd_count, >> sizeof(*stsd_entries_size)); >>> + for (j = 0; j < stsd_count; ++j) { >>> + /* 4B - size >>> + * 4B - format */ >>> + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + >> stsd_first_offset + stsd_offset); >>> + stsd_entries[j] = av_malloc(stsd_entries_size[j]); >>> + memcpy(stsd_entries[j], pls->init_sec_buf + >> stsd_first_offset + stsd_offset, stsd_entries_size[j]); >>> + stsd_offset += stsd_entries_size[j]; >>> + } >>> + // reorder stsd entries >>> + // as first put stsd entry for current representation >>> + j = pls->rep_idx; >>> + stsd_offset = stsd_first_offset; >>> + memcpy(pls->init_sec_buf + stsd_offset, >> stsd_entries[j], stsd_entries_size[j]); >>> + stsd_offset += stsd_entries_size[j]; >>> + for (j = 0; j < stsd_count; ++j) { >>> + if (j != pls->rep_idx) { >>> + memcpy(pls->init_sec_buf + stsd_offset, >> stsd_entries[j], stsd_entries_size[j]); >>> + stsd_offset += stsd_entries_size[j]; >>> + } >>> + av_free(stsd_entries[j]); >>> + } >>> + av_freep(&stsd_entries); >>> + av_freep(&stsd_entries_size); >>> + break; >>> + } >>> + i++; >>> + } >>> + } >>> + >>> + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section >> size[%d]\n", pls, (int)ret); >>> + pls->init_sec_data_len = ret; >>> + pls->init_sec_buf_read_offset = 0; >>> + >>> + return 0; >>> +} >>> + >>> +static int64_t seek_data(void *opaque, int64_t offset, int whence) >>> +{ >>> + struct representation *v = opaque; >>> + if (v->n_fragments && !v->init_sec_data_len) { >>> + return avio_seek(v->input, offset, whence); >>> + } >>> + >>> + return AVERROR(ENOSYS); >>> +} >>> + >>> +static int read_data(void *opaque, uint8_t *buf, int buf_size) >>> +{ >>> + int ret = 0; >>> + struct representation *v = opaque; >>> + DASHContext *c = v->parent->priv_data; >>> + >>> +restart: >>> + if (!v->input) { >>> + free_fragment(&v->cur_seg); >>> + v->cur_seg = get_current_fragment(v); >>> + if (!v->cur_seg) { >>> + ret = AVERROR_EOF; >>> + goto end; >>> + } >>> + >>> + /* load/update Media Initialization Section, if any */ >>> + ret = update_init_section(v); >>> + if (ret) >>> + goto end; >>> + >>> + ret = open_input(c, v, v->cur_seg); >>> + if (ret < 0) { >>> + if (ff_check_interrupt(c->interrupt_callback)) { >>> + goto end; >>> + ret = AVERROR_EXIT; >>> + } >>> + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment >> of playlist %d\n", v->rep_idx); >>> + v->cur_seq_no++; >>> + goto restart; >>> + } >>> + } >>> + >>> + if (v->init_sec_buf_read_offset < v->init_sec_data_len) { >>> + /* Push init section out first before first actual fragment */ >>> + int copy_size = FFMIN(v->init_sec_data_len - >> v->init_sec_buf_read_offset, buf_size); >>> + memcpy(buf, v->init_sec_buf, copy_size); >>> + v->init_sec_buf_read_offset += copy_size; >>> + ret = copy_size; >>> + goto end; >>> + } >>> + >>> + /* check the v->cur_seg, if it is null, get current and double >> check if the new v->cur_seg*/ >>> + if (!v->cur_seg) { >>> + v->cur_seg = get_current_fragment(v); >>> + } >>> + if (!v->cur_seg) { >>> + ret = AVERROR_EOF; >>> + goto end; >>> + } >>> + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL); >>> + if (ret > 0) >>> + goto end; >>> + ff_format_io_close(v->parent, &v->input); >>> + v->cur_seq_no++; >>> + goto restart; >>> + >>> +end: >>> + return ret; >>> +} >>> + >>> +static int save_avio_options(AVFormatContext *s) >>> +{ >>> + DASHContext *c = s->priv_data; >>> + const char *opts[] = { "headers", "user_agent", "user-agent", >> "cookies", NULL }, **opt = opts; >>> + uint8_t *buf = NULL; >>> + int ret = 0; >>> + >>> + while (*opt) { >>> + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) >> { >>> + if (buf) { >>> + ret = av_dict_set(&c->avio_opts, *opt, buf, >> AV_DICT_DONT_STRDUP_VAL); >>> + if (ret < 0) >>> + return ret; >>> + } >>> + } >>> + opt++; >>> + } >>> + >>> + return ret; >>> +} >>> + >>> +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const >> char *url, >>> + int flags, AVDictionary **opts) >>> +{ >>> + av_log(s, AV_LOG_ERROR, >>> + "A HDS playlist item '%s' referred to an external file '%s'. >> " >>> + "Opening this file was forbidden for security reasons\n", >>> + s->filename, url); >>> + return AVERROR(EPERM); >>> +} >>> + >>> +static int reopen_demux_for_component(AVFormatContext *s, struct >> representation *pls) >>> +{ >>> + DASHContext *c = s->priv_data; >>> + AVInputFormat *in_fmt = NULL; >>> + AVDictionary *in_fmt_opts = NULL; >>> + uint8_t *avio_ctx_buffer = NULL; >>> + int ret = 0; >>> + >>> + if (pls->ctx) { >>> + /* note: the internal buffer could have changed, and be != >> avio_ctx_buffer */ >>> + av_freep(&pls->pb.buffer); >>> + memset(&pls->pb, 0x00, sizeof(AVIOContext)); >>> + pls->ctx->pb = NULL; >>> + avformat_close_input(&pls->ctx); >>> + pls->ctx = NULL; >>> + } >>> + if (!(pls->ctx = avformat_alloc_context())) { >>> + ret = AVERROR(ENOMEM); >>> + goto fail; >>> + } >>> + >>> + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE); >>> + if (!avio_ctx_buffer ){ >>> + ret = AVERROR(ENOMEM); >>> + avformat_free_context(pls->ctx); >>> + pls->ctx = NULL; >>> + goto fail; >>> + } >>> + if (c->is_live) { >>> + ffio_init_context(&pls->pb, avio_ctx_buffer , >> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL); >>> + } else { >>> + ffio_init_context(&pls->pb, avio_ctx_buffer , >> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data); >>> + } >>> + pls->pb.seekable = 0; >>> + >>> + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0) >>> + goto fail; >>> + >>> + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO; >>> + pls->ctx->probesize = 1024 * 4; >>> + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE; >>> + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0); >>> + if (ret < 0) { >>> + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, >> playlist %d\n", (int)pls->rep_idx); >>> + avformat_free_context(pls->ctx); >>> + pls->ctx = NULL; >>> + goto fail; >>> + } >>> + >>> + pls->ctx->pb = &pls->pb; >>> + pls->ctx->io_open = nested_io_open; >>> + >>> + // provide additional information from mpd if available >>> + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); >> //pls->init_section->url >>> + av_dict_free(&in_fmt_opts); >>> + if (ret < 0) >>> + goto fail; >>> + if (pls->n_fragments) { >>> + ret = avformat_find_stream_info(pls->ctx, NULL); >>> + if (ret < 0) >>> + goto fail; >>> + } >>> + >>> +fail: >>> + return ret; >>> +} >>> + >>> +static int open_demux_for_component(AVFormatContext *s, struct >> representation *pls) >>> +{ >>> + int ret = 0; >>> + int i; >>> + >>> + pls->parent = s; >>> + pls->cur_seq_no = calc_cur_seg_no(s, pls); >>> + pls->last_seq_no = calc_max_seg_no(s, pls); >>> + >>> + ret = reopen_demux_for_component(s, pls); >>> + if (ret < 0) { >>> + goto fail; >>> + } >>> + for (i = 0; i < pls->ctx->nb_streams; i++) { >>> + AVStream *st = avformat_new_stream(s, NULL); >>> + AVStream *ist = pls->ctx->streams[i]; >>> + if (!st) { >>> + ret = AVERROR(ENOMEM); >>> + goto fail; >>> + } >>> + st->id = i; >>> + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]-> >> codecpar); >>> + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, >> ist->time_base.den); >>> + } >>> + >>> + return 0; >>> +fail: >>> + return ret; >>> +} >>> + >>> +static int dash_read_header(AVFormatContext *s) >>> +{ >>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; >>> + DASHContext *c = s->priv_data; >>> + int ret = 0; >>> + int stream_index = 0; >>> + >>> + c->interrupt_callback = &s->interrupt_callback; >>> + // if the URL context is good, read important options we must >> broker later >>> + if (u) { >>> + update_options(&c->user_agent, "user-agent", u); >>> + update_options(&c->cookies, "cookies", u); >>> + update_options(&c->headers, "headers", u); >>> + } >>> + >>> + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0) >>> + goto fail; >>> + >>> + if ((ret = save_avio_options(s)) < 0) >>> + goto fail; >>> + >>> + /* If this isn't a live stream, fill the total duration of the >>> + * stream. */ >>> + if (!c->is_live) { >>> + s->duration = (int64_t) c->media_presentation_duration_sec * >> AV_TIME_BASE; >>> + } >>> + >>> + /* Open the demuxer for curent video and current audio components >> if available */ >>> + if (!ret && c->cur_video) { >>> + ret = open_demux_for_component(s, c->cur_video); >>> + if (!ret) { >>> + c->cur_video->stream_index = stream_index; >>> + ++stream_index; >>> + } else { >>> + free_representation(c->cur_video); >>> + c->cur_video = NULL; >>> + } >>> + } >>> + >>> + if (!ret && c->cur_audio) { >>> + ret = open_demux_for_component(s, c->cur_audio); >>> + if (!ret) { >>> + c->cur_audio->stream_index = stream_index; >>> + ++stream_index; >>> + } else { >>> + free_representation(c->cur_audio); >>> + c->cur_audio = NULL; >>> + } >>> + } >>> + >>> + if (!stream_index) { >>> + ret = AVERROR_INVALIDDATA; >>> + goto fail; >>> + } >>> + >>> + /* Create a program */ >>> + if (!ret) { >>> + AVProgram *program; >>> + program = av_new_program(s, 0); >>> + if (!program) { >>> + goto fail; >>> + } >>> + >>> + if (c->cur_video) { >>> + av_program_add_stream_index(s, 0, >> c->cur_video->stream_index); >>> + } >>> + >>> + if (c->cur_audio) { >>> + av_program_add_stream_index(s, 0, >> c->cur_audio->stream_index); >>> + } >>> + } >>> + >>> + return 0; >>> +fail: >>> + return ret; >>> +} >>> + >>> +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt) >>> +{ >>> + DASHContext *c = s->priv_data; >>> + int ret = 0; >>> + struct representation *cur = NULL; >>> + >>> + if (!c->cur_audio && !c->cur_video) { >>> + return AVERROR_INVALIDDATA; >>> + } >>> + if (c->cur_audio && !c->cur_video) { >>> + cur = c->cur_audio; >>> + } else if (!c->cur_audio && c->cur_video) { >>> + cur = c->cur_video; >>> + } else if (c->cur_video->cur_timestamp < >> c->cur_audio->cur_timestamp) { >>> + cur = c->cur_video; >>> + } else { >>> + cur = c->cur_audio; >>> + } >>> + >>> + if (cur->ctx) { >>> + ret = av_read_frame(cur->ctx, &cur->pkt); >>> + if (ret < 0) { >>> + av_packet_unref(&cur->pkt); >>> + } else { >>> + /* If we got a packet, return it */ >>> + *pkt = cur->pkt; >>> + cur->cur_timestamp = av_rescale(pkt->pts, >> (int64_t)cur->ctx->streams[0]->time_base.num * 90000, >> cur->ctx->streams[0]->time_base.den); >>> + pkt->stream_index = cur->stream_index; >>> + reset_packet(&cur->pkt); >>> + return 0; >>> + } >>> + } >>> + return AVERROR_EOF; >>> +} >>> + >>> +static int dash_close(AVFormatContext *s) >>> +{ >>> + DASHContext *c = s->priv_data; >>> + >>> + if (c->cur_audio) { >>> + free_representation(c->cur_audio); >>> + } >>> + >>> + if (c->cur_video) { >>> + free_representation(c->cur_video); >>> + } >>> + >>> + av_freep(&c->cookies); >>> + av_freep(&c->user_agent); >>> + av_dict_free(&c->avio_opts); >>> + av_freep(&c->base_url); >>> + return 0; >>> +} >>> + >>> +static int dash_seek(AVFormatContext *s, struct representation *pls, >> int64_t seek_pos_msec, int flags) >>> +{ >>> + int ret = 0; >>> + int i = 0; >>> + int j = 0; >>> + int64_t duration = 0; >>> + >>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], >> playlist %d\n", seek_pos_msec, pls->rep_idx); >>> + >>> + // single fragment mode >>> + if (pls->n_fragments) { >>> + pls->cur_timestamp = 0; >>> + pls->cur_seg_offset = 0; >>> + ff_read_frame_flush(pls->ctx); >>> + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags); >>> + } >>> + >>> + if (pls->input) >>> + ff_format_io_close(pls->parent, &pls->input); >>> + >>> + // find the nearest fragment >>> + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) { >>> + int64_t num = pls->first_seq_no; >>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with >> SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist >> %d.\n", >>> + (int)pls->n_timelines, (int64_t)pls->last_seq_no, >> (int)pls->rep_idx); >>> + for (i = 0; i < pls->n_timelines; i++) { >>> + if (pls->timelines[i]->t > 0) { >>> + duration = pls->timelines[i]->t; >>> + } >>> + duration += pls->timelines[i]->d; >>> + if (seek_pos_msec < ((duration * 1000) / >> pls->fragment_timescale)) { >>> + goto set_seq_num; >>> + } >>> + for (j = 0; j < pls->timelines[i]->r; j++) { >>> + duration += pls->timelines[i]->d; >>> + num++; >>> + if (seek_pos_msec < ((duration * 1000) / >> pls->fragment_timescale)) { >>> + goto set_seq_num; >>> + } >>> + } >>> + num++; >>> + } >>> + >>> +set_seq_num: >>> + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : >> num; >>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with >> SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n", >>> + (int64_t)pls->cur_seq_no, (int)pls->rep_idx); >>> + } else if (pls->fragment_duration > 0) { >>> + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * >> pls->fragment_timescale) / pls->fragment_duration) / 1000; >>> + } else { >>> + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing >> fragment_duration\n"); >>> + pls->cur_seq_no = pls->first_seq_no; >>> + } >>> + pls->cur_timestamp = 0; >>> + pls->cur_seg_offset = 0; >>> + pls->init_sec_buf_read_offset = 0; >>> + ret = reopen_demux_for_component(s, pls); >>> + >>> + return ret; >>> +} >>> + >>> +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t >> timestamp, int flags) >>> +{ >>> + int ret = 0; >>> + DASHContext *c = s->priv_data; >>> + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000, >>> + s->streams[stream_index]-> >> time_base.den, >>> + flags & AVSEEK_FLAG_BACKWARD ? >>> + AV_ROUND_DOWN : AV_ROUND_UP); >>> + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live) >>> + return AVERROR(ENOSYS); >>> + if (c->cur_audio) { >>> + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags); >>> + } >>> + if (!ret && c->cur_video) { >>> + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags); >>> + } >>> + return ret; >>> +} >>> + >>> +static int dash_probe(AVProbeData *p) >>> +{ >>> + if (!av_stristr(p->buf, "<MPD")) >>> + return 0; >>> + >>> + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") || >>> + av_stristr(p->buf, "dash:profile:isoff-live:2011") || >>> + av_stristr(p->buf, "dash:profile:isoff-live:2012") || >>> + av_stristr(p->buf, "dash:profile:isoff-main:2011")) { >>> + return AVPROBE_SCORE_MAX; >>> + } >>> + if (av_stristr(p->buf, "dash:profile")) { >>> + return AVPROBE_SCORE_MAX >> 1; >>> + } >>> + >>> + return 0; >>> +} >>> + >>> +#define OFFSET(x) offsetof(DASHContext, x) >>> +#define FLAGS AV_OPT_FLAG_DECODING_PARAM >>> +static const AVOption dash_options[] = { >>> + {"audio_rep_index", "audio representation index to be used", >> OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, >> FLAGS}, >>> + {"video_rep_index", "video representation index to be used", >> OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, >> FLAGS}, >>> + {NULL} >>> +}; >>> + >>> +static const AVClass dash_class = { >>> + .class_name = "dash", >>> + .item_name = av_default_item_name, >>> + .option = dash_options, >>> + .version = LIBAVUTIL_VERSION_INT, >>> +}; >>> + >>> +AVInputFormat ff_dash_demuxer = { >>> + .name = "dash", >>> + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming >> over HTTP"), >>> + .priv_class = &dash_class, >>> + .priv_data_size = sizeof(DASHContext), >>> + .read_probe = dash_probe, >>> + .read_header = dash_read_header, >>> + .read_packet = dash_read_packet, >>> + .read_close = dash_close, >>> + .read_seek = dash_read_seek, >>> + .flags = AVFMT_NO_BYTE_SEEK, >>> +}; >>> -- >>> 2.10.1 (Apple Git-78) >>> >>> >>> >>> _______________________________________________ >>> ffmpeg-devel mailing list >>> ffmpeg-devel@ffmpeg.org >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel> >> > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel>
2017-03-22 22:36 GMT+08:00 Rodger Combs <rodger.combs@gmail.com>: > > > On Mar 22, 2017, at 09:31, Steven Liu <lingjiujianke@gmail.com> wrote: > > > > 2017-03-22 22:01 GMT+08:00 Rodger Combs <rodger.combs@gmail.com <mailto: > rodger.combs@gmail.com>>: > > > >> > >>> On Mar 21, 2017, at 08:16, Steven Liu <lq@chinaffmpeg.org> wrote: > >>> > >>> v2 fixed: > >>> 1. from autodetect to disabled > >>> 2. from camelCase code style to ffmpeg code style > >>> 3. from RepType to AVMediaType > >>> 4. fix variable typo > >>> 5. change time value from uint32_t to uint64_t > >>> 6. removed be used once API > >>> 7. change 'time(NULL)`, except it is not 2038-safe.' to av_gettime and > >> av_timegm > >>> 8. merge complex free operation to free_fragment > >>> 9. use API from snprintf to av_asprintf > >>> > >>> v3 fixed: > >>> 1. fix typo from --enabled-xml2 to --enable-xml2 > >>> > >>> v4 fixed: > >>> 1. from --enable-xml2 to --enable-libxml2 > >>> 2. move system includes to top > >>> 3. remove nouse includes > >>> 4. rename enum name > >>> 5. add a trailing comma for the last entry enum > >>> 6. fix comment typo > >>> 7. add const to DASHContext class front > >>> 8. check sscanf if return arguments and give warning message when error > >>> 9. check validity before free seg->url and seg > >>> 10. check if the val is null, before use atoll > >>> > >>> v5 fixed: > >>> 1. fix typo from mainifest to manifest > >>> > >>> v6 fixed: > >>> 1. from realloc to av_realloc > >>> 2. from free to av_free > >>> > >>> Reviewed-by: Clément Bœsch <u@pkh.me> > >>> Reviewed-by: Michael Niedermayer <michael@niedermayer.cc> > >>> Reviewed-by: Carl Eugen Hoyos <cehoyos@ag.or.at> > >>> Reviewed-by: Rodger Combs <rodger.combs@gmail.com> > >>> Reviewed-by: Moritz Barsnick <barsnick@gmx.net> > >>> Reviewed-by: Nicolas George <george@nsup.org> > >>> Reviewed-by: Ricardo Constantino <wiiaboo@gmail.com> > >>> Signed-off-by: Steven Liu <lq@chinaffmpeg.org> > >>> --- > >>> configure | 4 + > >>> libavformat/Makefile | 1 + > >>> libavformat/allformats.c | 2 +- > >>> libavformat/dashdec.c | 1841 ++++++++++++++++++++++++++++++ > >> ++++++++++++++++ > >>> 4 files changed, 1847 insertions(+), 1 deletion(-) > >>> create mode 100644 libavformat/dashdec.c > >>> > >>> diff --git a/configure b/configure > >>> index 4eb116b..86d16a8 100755 > >>> --- a/configure > >>> +++ b/configure > >>> @@ -273,6 +273,7 @@ External library support: > >>> --enable-libxcb-shape enable X11 grabbing shape rendering > >> [autodetect] > >>> --enable-libxvid enable Xvid encoding via xvidcore, > >>> native MPEG-4/Xvid encoder exists [no] > >>> + --enable-libxml2 enable XML parsing using the C library > >> libxml2 [no] > >>> --enable-libzimg enable z.lib, needed for zscale filter [no] > >>> --enable-libzmq enable message passing via libzmq [no] > >>> --enable-libzvbi enable teletext support via libzvbi [no] > >>> @@ -1590,6 +1591,7 @@ EXTERNAL_LIBRARY_LIST=" > >>> libvpx > >>> libwavpack > >>> libwebp > >>> + libxml2 > >>> libzimg > >>> libzmq > >>> libzvbi > >>> @@ -2920,6 +2922,7 @@ avi_muxer_select="riffenc" > >>> caf_demuxer_select="iso_media riffdec" > >>> caf_muxer_select="iso_media" > >>> dash_muxer_select="mp4_muxer" > >>> +dash_demuxer_deps="libxml2" > >>> dirac_demuxer_select="dirac_parser" > >>> dts_demuxer_select="dca_parser" > >>> dtshd_demuxer_select="dca_parser" > >>> @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config > >> openssl openssl/ssl.h OPENSSL_init > >>> check_lib openssl/ssl.h SSL_library_init > >> -lssl -lcrypto -lws2_32 -lgdi32 || > >>> die "ERROR: openssl not found"; } > >>> enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || > >> disable qtkit_indev; } > >>> +enabled libxml2 && require_pkg_config libxml-2.0 > >> libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 > >>> > >>> # libdc1394 check > >>> if enabled libdc1394; then > >>> diff --git a/libavformat/Makefile b/libavformat/Makefile > >>> index f56ef16..d77ffaa 100644 > >>> --- a/libavformat/Makefile > >>> +++ b/libavformat/Makefile > >>> @@ -134,6 +134,7 @@ OBJS-$(CONFIG_CRC_MUXER) += > crcenc.o > >>> OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o > >>> OBJS-$(CONFIG_DATA_MUXER) += rawenc.o > >>> OBJS-$(CONFIG_DASH_MUXER) += dashenc.o > >>> +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o > >>> OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o > >>> OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o > >>> OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o > >>> diff --git a/libavformat/allformats.c b/libavformat/allformats.c > >>> index 09e62c3..d57314b 100644 > >>> --- a/libavformat/allformats.c > >>> +++ b/libavformat/allformats.c > >>> @@ -96,7 +96,7 @@ static void register_all(void) > >>> REGISTER_DEMUXER (CINE, cine); > >>> REGISTER_DEMUXER (CONCAT, concat); > >>> REGISTER_MUXER (CRC, crc); > >>> - REGISTER_MUXER (DASH, dash); > >>> + REGISTER_MUXDEMUX(DASH, dash); > >>> REGISTER_MUXDEMUX(DATA, data); > >>> REGISTER_MUXDEMUX(DAUD, daud); > >>> REGISTER_DEMUXER (DCSTR, dcstr); > >>> diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c > >>> new file mode 100644 > >>> index 0000000..e0be85e > >>> --- /dev/null > >>> +++ b/libavformat/dashdec.c > >>> @@ -0,0 +1,1841 @@ > >>> +/* > >>> + * Dynamic Adaptive Streaming over HTTP demux > >>> + * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux > >>> + * Copyright (c) 2017 Steven Liu > >>> + * > >>> + * This file is part of FFmpeg. > >>> + * > >>> + * FFmpeg is free software; you can redistribute it and/or > >>> + * modify it under the terms of the GNU Lesser General Public > >>> + * License as published by the Free Software Foundation; either > >>> + * version 2.1 of the License, or (at your option) any later version. > >>> + * > >>> + * FFmpeg is distributed in the hope that it will be useful, > >>> + * but WITHOUT ANY WARRANTY; without even the implied warranty of > >>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > >>> + * Lesser General Public License for more details. > >>> + * > >>> + * You should have received a copy of the GNU Lesser General Public > >>> + * License along with FFmpeg; if not, write to the Free Software > >>> + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA > >> 02110-1301 USA > >>> + */ > >>> +#include <libxml/parser.h> > >>> +#include "libavutil/intreadwrite.h" > >>> +#include "libavutil/opt.h" > >>> +#include "libavutil/time.h" > >>> +#include "libavutil/parseutils.h" > >>> +#include "internal.h" > >>> +#include "avio_internal.h" > >>> + > >>> +#define INITIAL_BUFFER_SIZE 32768 > >>> + > >>> +struct fragment { > >>> + int64_t url_offset; > >>> + int64_t size; > >>> + char *url; > >>> +}; > >>> + > >>> +/* > >>> + * reference to : ISO_IEC_23009-1-DASH-2012 > >>> + * Section: 5.3.9.6.2 > >>> + * Table: Table 17 — Semantics of SegmentTimeline element > >>> + * */ > >>> +struct timeline { > >>> + /* t: Element or Attribute Name > >>> + * specifies the MPD start time, in @timescale units, > >>> + * the first Segment in the series starts relative to the > beginning > >> of the Period. > >>> + * The value of this attribute must be equal to or greater than > the > >> sum of the previous S > >>> + * element earliest presentation time and the sum of the > contiguous > >> Segment durations. > >>> + * If the value of the attribute is greater than what is expressed > >> by the previous S element, > >>> + * it expresses discontinuities in the timeline. > >>> + * If not present then the value shall be assumed to be zero for > >> the first S element > >>> + * and for the subsequent S elements, the value shall be assumed > to > >> be the sum of > >>> + * the previous S element's earliest presentation time and > >> contiguous duration > >>> + * (i.e. previous S@t + @d * (@r + 1)). > >>> + * */ > >>> + int64_t t; > >>> + /* r: Element or Attribute Name > >>> + * specifies the repeat count of the number of following > contiguous > >> Segments with > >>> + * the same duration expressed by the value of @d. This value is > >> zero-based > >>> + * (e.g. a value of three means four Segments in the contiguous > >> series). > >>> + * */ > >>> + int32_t r; > >>> + /* d: Element or Attribute Name > >>> + * specifies the Segment duration, in units of the value of the > >> @timescale. > >>> + * */ > >>> + int64_t d; > >>> +}; > >>> + > >>> +enum DASHTmplUrlType { > >>> + TMP_URL_TYPE_UNSPECIFIED, > >>> + TMP_URL_TYPE_NUMBER, > >>> + TMP_URL_TYPE_TIME, > >>> +}; > >>> + > >>> +/* > >>> + * Each playlist has its own demuxer. If it is currently active, > >>> + * it has an opened AVIOContext too, and potentially an AVPacket > >>> + * containing the next packet from this stream. > >>> + */ > >>> +struct representation { > >>> + char *url_template; > >>> + enum DASHTmplUrlType tmp_url_type; > >>> + AVIOContext pb; > >>> + AVIOContext *input; > >>> + AVFormatContext *parent; > >>> + AVFormatContext *ctx; > >>> + AVPacket pkt; > >>> + int rep_idx; > >>> + int rep_count; > >>> + int stream_index; > >>> + > >>> + enum AVMediaType type; > >>> + int64_t target_duration; > >>> + > >>> + int n_fragments; > >>> + struct fragment **fragments; /* VOD list of fragment for profile > */ > >>> + > >>> + int n_timelines; > >>> + struct timeline **timelines; > >>> + > >>> + int64_t first_seq_no; > >>> + int64_t last_seq_no; > >>> + > >>> + int64_t fragment_duration; > >>> + int64_t fragment_timescale; > >>> + > >>> + int64_t cur_seq_no; > >>> + int64_t cur_seg_offset; > >>> + int64_t cur_seg_size; > >>> + struct fragment *cur_seg; > >>> + > >>> + /* Currently active Media Initialization Section */ > >>> + struct fragment *init_section; > >>> + uint8_t *init_sec_buf; > >>> + uint32_t init_sec_buf_size; > >>> + uint32_t init_sec_data_len; > >>> + uint32_t init_sec_buf_read_offset; > >>> + int fix_multiple_stsd_order; > >>> + int64_t cur_timestamp; > >>> +}; > >>> + > >>> +typedef struct DASHContext { > >>> + const AVClass *class; > >>> + char *base_url; > >>> + struct representation *cur_video; > >>> + struct representation *cur_audio; > >>> + uint64_t media_presentation_duration_sec; > >>> + uint64_t suggested_presentation_delay_sec; > >>> + uint64_t presentation_delay_sec; > >>> + uint64_t availability_start_time_sec; > >>> + uint64_t publish_time_sec; > >>> + uint64_t minimum_update_period_sec; > >>> + uint64_t time_shift_buffer_depth_sec; > >>> + uint64_t min_buffer_time_sec; > >>> + uint64_t period_duration_sec; > >>> + uint64_t period_start_sec; > >>> + int is_live; > >>> + int audio_rep_index; > >>> + int video_rep_index; > >>> + AVIOInterruptCB *interrupt_callback; > >>> + char *user_agent; ///< holds HTTP user agent > set > >> as an AVOption to the HTTP protocol context > >>> + char *cookies; ///< holds HTTP cookie values > >> set in either the initial response or as an AVOption to the HTTP > protocol > >> context > >>> + char *headers; ///< holds HTTP headers set > as > >> an AVOption to the HTTP protocol context > >>> + AVDictionary *avio_opts; > >>> +} DASHContext; > >>> + > >>> +static uint64_t GetCurrentTimeInSec(void) > >>> +{ > >>> + return av_gettime() / 1000000; > >>> +} > >>> + > >>> +static uint64_t GetUTCDateTimeInSec(AVFormatContext *s, const char > >> *datetime) > >>> +{ > >>> + struct tm timeinfo; > >>> + int year = 0; > >>> + int month = 0; > >>> + int day = 0; > >>> + int hour = 0; > >>> + int minute = 0; > >>> + int ret = 0; > >>> + float second = 0.0; > >>> + > >>> + /* ISO-8601 date parser */ > >>> + if (!datetime) > >>> + return 0; > >>> + > >>> + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, > >> &hour, &minute, &second); > >>> + /* year, month, day, hour, minute, second 6 arguments */ > >>> + if (ret != 6) { > >>> + av_log(s, AV_LOG_WARNING, "GetUTCDateTimeInSec get a wrong > time > >> format\n"); > >>> + // return 0; /* parser error */ > >>> + } > >>> + timeinfo.tm_year = year - 1900; > >>> + timeinfo.tm_mon = month - 1; > >>> + timeinfo.tm_mday = day; > >>> + timeinfo.tm_hour = hour; > >>> + timeinfo.tm_min = minute; > >>> + timeinfo.tm_sec = (int)second; > >>> + > >>> + return av_timegm(&timeinfo); > >>> +} > >>> + > >>> +static uint32_t GetDurationInSec(AVFormatContext *s, const char > >> *duration) > >>> +{ > >>> + /* ISO-8601 duration parser */ > >>> + uint32_t days = 0; > >>> + uint32_t hours = 0; > >>> + uint32_t mins = 0; > >>> + uint32_t secs = 0; > >>> + uint32_t size = 0; > >>> + float value = 0; > >>> + uint8_t type = 0; > >>> + const char *ptr = duration; > >>> + > >>> + while (*ptr) { > >>> + if (*ptr == 'P' || *ptr == 'T') { > >>> + ptr++; > >>> + continue; > >>> + } > >>> + > >>> + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) { > >>> + av_log(s, AV_LOG_WARNING, "GetDurationInSec get a wrong > >> time format\n"); > >>> + return 0; /* parser error */ > >>> + } > >>> + switch (type) { > >>> + case 'D': > >>> + days = (uint32_t)value; > >>> + break; > >>> + case 'H': > >>> + hours = (uint32_t)value; > >>> + break; > >>> + case 'M': > >>> + mins = (uint32_t)value; > >>> + break; > >>> + case 'S': > >>> + secs = (uint32_t)value; > >>> + break; > >>> + default: > >>> + // handle invalid type > >>> + break; > >>> + } > >>> + ptr += size; > >>> + } > >>> + return ((days * 24 + hours) * 60 + mins) * 60 + secs; > >>> +} > >>> + > >>> +static void free_fragment(struct fragment **seg) > >>> +{ > >>> + if (!(*seg)) { > >>> + return; > >>> + } > >>> + av_freep(&(*seg)->url); > >>> + av_freep(seg); > >>> +} > >>> + > >>> +static void free_fragment_list(struct representation *pls) > >>> +{ > >>> + int i; > >>> + > >>> + for (i = 0; i < pls->n_fragments; i++) { > >>> + free_fragment(&pls->fragments[i]); > >>> + } > >>> + av_freep(&pls->fragments); > >>> + pls->n_fragments = 0; > >>> +} > >>> + > >>> +static void free_timelines_list(struct representation *pls) > >>> +{ > >>> + int i; > >>> + > >>> + for (i = 0; i < pls->n_timelines; i++) { > >>> + av_freep(&pls->timelines[i]); > >>> + } > >>> + av_freep(&pls->timelines); > >>> + pls->n_timelines = 0; > >>> +} > >>> + > >>> +/* > >>> + * Used to reset a statically allocated AVPacket to a clean slate, > >>> + * containing no data. > >>> + */ > >>> +static void reset_packet(AVPacket *pkt) > >>> +{ > >>> + av_init_packet(pkt); > >>> + pkt->data = NULL; > >>> +} > >>> + > >>> +static void free_representation(struct representation *pls) > >>> +{ > >>> + free_fragment_list(pls); > >>> + free_timelines_list(pls); > >>> + free_fragment(&pls->cur_seg); > >>> + free_fragment(&pls->init_section); > >>> + av_freep(&pls->init_sec_buf); > >>> + av_packet_unref(&pls->pkt); > >>> + reset_packet(&pls->pkt); > >>> + av_freep(&pls->pb.buffer); > >>> + if (pls->input) > >>> + ff_format_io_close(pls->parent, &pls->input); > >>> + if (pls->ctx) { > >>> + pls->ctx->pb = NULL; > >>> + avformat_close_input(&pls->ctx); > >>> + } > >>> + > >>> + av_free(pls->url_template); > >>> + av_free(pls); > >>> +} > >>> + > >>> +static void update_options(char **dest, const char *name, void *src) > >>> +{ > >>> + av_freep(dest); > >>> + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest); > >>> + if (*dest) > >>> + av_freep(dest); > >>> +} > >>> + > >>> +static int open_url(AVFormatContext *s, AVIOContext **pb, const char > >> *url, > >>> + AVDictionary *opts, AVDictionary *opts2, int > >> *is_http) > >>> +{ > >>> + DASHContext *c = s->priv_data; > >>> + AVDictionary *tmp = NULL; > >>> + const char *proto_name = NULL; > >>> + int ret; > >>> + > >>> + av_dict_copy(&tmp, opts, 0); > >>> + av_dict_copy(&tmp, opts2, 0); > >>> + > >>> + if (av_strstart(url, "crypto", NULL)) { > >>> + if (url[6] == '+' || url[6] == ':') > >>> + proto_name = avio_find_protocol_name(url + 7); > >>> + } > >>> + > >>> + if (!proto_name) > >>> + proto_name = avio_find_protocol_name(url); > >>> + > >>> + if (!proto_name) > >>> + return AVERROR_INVALIDDATA; > >>> + > >>> + // only http(s) & file are allowed > >>> + if (!av_strstart(proto_name, "http", NULL) && > >> !av_strstart(proto_name, "file", NULL)) > >>> + return AVERROR_INVALIDDATA; > >>> + if (!strncmp(proto_name, url, strlen(proto_name)) && > >> url[strlen(proto_name)] == ':') > >>> + ; > >>> + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, > >> url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') > >>> + ; > >>> + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) > >>> + return AVERROR_INVALIDDATA; > >>> + > >>> + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp); > >>> + if (ret >= 0) { > >>> + // update cookies on http response with setcookies. > >>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > >>> + update_options(&c->cookies, "cookies", u); > >>> + av_dict_set(&opts, "cookies", c->cookies, 0); > >>> + } > >>> + > >>> + av_dict_free(&tmp); > >>> + > >>> + if (is_http) > >>> + *is_http = av_strstart(proto_name, "http", NULL); > >>> + > >>> + return ret; > >>> + > >>> +} > >>> + > >>> +static char *strreplace(const char *str, const char *from, const char > >> *to) > >>> +{ > >>> + /* Adjust each of the below values to suit your needs. */ > >>> + /* Increment positions cache size initially by this number. */ > >>> + size_t cache_sz_inc = 16; > >>> + /* Thereafter, each time capacity needs to be increased, > >>> + * multiply the increment by this factor. */ > >>> + const size_t cache_sz_inc_factor = 3; > >>> + /* But never increment capacity by more than this number. */ > >>> + const size_t cache_sz_inc_max = 1048576; > >>> + > >>> + char *pret, *ret = NULL; > >>> + const char *pstr2, *pstr = str; > >>> + size_t i, count = 0; > >>> + uintptr_t *pos_cache_tmp, *pos_cache = NULL; > >>> + size_t cache_sz = 0; > >>> + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from); > >>> + > >>> + /* Find all matches and cache their positions. */ > >>> + while ((pstr2 = av_stristr(pstr, from))) { > >>> + count++; > >>> + /* Increase the cache size when necessary. */ > >>> + if (cache_sz < count) { > >>> + cache_sz += cache_sz_inc; > >>> + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) * > >> cache_sz); > >>> + if (!pos_cache_tmp) { > >>> + goto end_strreplace; > >>> + } else pos_cache = pos_cache_tmp; > >>> + cache_sz_inc *= cache_sz_inc_factor; > >>> + if (cache_sz_inc > cache_sz_inc_max) { > >>> + cache_sz_inc = cache_sz_inc_max; > >>> + } > >>> + } > >>> + > >>> + pos_cache[count-1] = pstr2 - str; > >>> + pstr = pstr2 + fromlen; > >>> + } > >>> + orglen = pstr - str + strlen(pstr); > >>> + /* Allocate memory for the post-replacement string. */ > >>> + if (count > 0) { > >>> + tolen = strlen(to); > >>> + retlen = orglen + (tolen - fromlen) * count; > >>> + } else { > >>> + retlen = orglen; > >>> + } > >>> + ret = av_malloc(retlen + 1); > >>> + if (!ret) { > >>> + goto end_strreplace; > >>> + } > >>> + > >>> + if (!count) { > >>> + /* If no matches, then just duplicate the string. */ > >>> + av_strlcpy(ret, str, retlen + 1); > >>> + } else { > >>> + /* Otherwise, duplicate the string whilst performing > >>> + * the replacements using the position cache. */ > >>> + pret = ret; > >>> + memcpy(pret, str, pos_cache[0]); > >>> + pret += pos_cache[0]; > >>> + for (i = 0; i < count; i++) { > >>> + memcpy(pret, to, tolen); > >>> + pret += tolen; > >>> + pstr = str + pos_cache[i] + fromlen; > >>> + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) - > >> pos_cache[i] - fromlen; > >>> + memcpy(pret, pstr, cpylen); > >>> + pret += cpylen; > >>> + } > >>> + ret[retlen] = '\0'; > >>> + } > >>> + > >>> +end_strreplace: > >>> + /* Free the cache and return the post-replacement string, > >>> + * which will be NULL in the event of an error. */ > >>> + av_free(pos_cache); > >>> + return ret; > >>> +} > >>> + > >>> +static char *replace_template_str(const char *url, const char *marker) > >>> +{ > >>> + char *prefix = NULL; > >>> + char *start = 0; > >>> + char *end = NULL; > >>> + char *tmp_url = NULL; > >>> + char *new_url = NULL; > >>> + int marker_len; > >>> + > >>> + prefix = av_strdup(marker); > >>> + marker_len = strlen(prefix) - 1; > >>> + prefix[marker_len] = '\0'; > >>> + > >>> + start = av_stristr(url, prefix); > >>> + if (!start) > >>> + goto finish; > >>> + end = strchr(start + 1, '$'); > >>> + if (!end) > >>> + goto finish; > >>> + > >>> + if (start[marker_len] != '%') > >>> + goto finish; > >>> + > >>> + if (end[-1] != 'd') > >>> + goto finish; > >>> + > >>> + tmp_url = av_mallocz(MAX_URL_SIZE); > >>> + if (!tmp_url) { > >>> + return NULL; > >>> + } > >>> + > >>> + av_strlcpy(tmp_url, url, start - url+ 1); > >>> + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end - > >> start - marker_len); > >>> + av_strlcat(tmp_url, PRId64, MAX_URL_SIZE); > >>> + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE); > >>> + > >>> +finish: > >>> + av_free(prefix); > >>> + new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64); > >>> + av_free(tmp_url); > >>> + return new_url; > >>> +} > >>> + > >>> +static char *get_content_url(xmlNodePtr *baseurl_nodes, int > >> n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, > xmlChar > >> *val) > >>> +{ > >>> + int i; > >>> + xmlChar *text; > >>> + char *url = NULL; > >>> + char *tmp_str = av_mallocz(MAX_URL_SIZE); > >>> + char *tmp_str_2 = NULL; > >>> + > >>> + if (!tmp_str) { > >>> + return NULL; > >>> + } > >>> + for (i = 0; i < n_baseurl_nodes; ++i) { > >>> + if (baseurl_nodes[i] && baseurl_nodes[i]->children && > >> baseurl_nodes[i]->children->type == XML_TEXT_NODE) { > >>> + text = xmlNodeGetContent(baseurl_nodes[i]->children); > >>> + if (text) { > >>> + tmp_str_2 = av_mallocz(MAX_URL_SIZE); > >>> + if (!tmp_str_2) { > >>> + av_free(tmp_str); > >>> + return NULL; > >>> + } > >>> + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, > tmp_str, > >> text); > >>> + av_free(tmp_str); > >>> + tmp_str = tmp_str_2; > >>> + xmlFree(text); > >>> + } > >>> + } > >>> + } > >>> + if (val) > >>> + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE); > >>> + if (rep_id_val) { > >>> + url = strreplace(tmp_str, "$RepresentationID$", (const > >> char*)rep_id_val); > >>> + av_free(tmp_str); > >>> + tmp_str = url; > >>> + } > >>> + if (rep_bandwidth_val && tmp_str) > >>> + url = strreplace(tmp_str, "$Bandwidth$", (const > >> char*)rep_bandwidth_val); > >>> + if (tmp_str != url) > >>> + av_free(tmp_str); > >>> + return url; > >>> +} > >>> + > >>> +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int > >> n_nodes, const xmlChar *attrname) > >>> +{ > >>> + int i; > >>> + xmlChar *val; > >>> + > >>> + for (i = 0; i < n_nodes; ++i) { > >>> + if (nodes[i]) { > >>> + val = xmlGetProp(nodes[i], attrname); > >>> + if (val) > >>> + return val; > >>> + } > >>> + } > >>> + > >>> + return NULL; > >>> +} > >>> + > >>> +static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const > >> xmlChar *nodename) > >>> +{ > >>> + xmlNodePtr node = rootnode; > >>> + if (!node) { > >>> + return NULL; > >>> + } > >>> + > >>> + node = xmlFirstElementChild(node); > >>> + while (node) { > >>> + if (!xmlStrcmp(node->name, nodename)) { > >>> + return node; > >>> + } > >>> + node = xmlNextElementSibling(node); > >>> + } > >>> + return NULL; > >>> +} > >>> + > >>> +static enum AVMediaType get_content_type(xmlNodePtr node) > >>> +{ > >>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > >>> + int i = 0; > >>> + const char *attr; > >>> + > >>> + if (node) { > >>> + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) { > >>> + attr = (i) ? "mimeType" : "contentType"; > >>> + xmlChar *val = xmlGetProp(node, attr); > >>> + if (val) { > >>> + if (av_stristr((const char *)val, "video")) { > >>> + type = AVMEDIA_TYPE_VIDEO; > >>> + } else if (av_stristr((const char *)val, "audio")) { > >>> + type = AVMEDIA_TYPE_AUDIO; > >>> + } > >>> + xmlFree(val); > >>> + } > >>> + i++; > >>> + } > >>> + } > >>> + return type; > >>> +} > >>> + > >>> +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct > >> representation *rep, > >>> + xmlNodePtr fragmenturl_node, > >>> + xmlNodePtr *baseurl_nodes, > >>> + xmlChar *rep_id_val, > >>> + xmlChar *rep_bandwidth_val) > >>> +{ > >>> + xmlChar *initialization_val = NULL; > >>> + xmlChar *media_val = NULL; > >>> + > >>> + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar > >> *)"Initialization")) { > >>> + initialization_val = xmlGetProp(fragmenturl_node, > "sourceURL"); > >>> + if (initialization_val) { > >>> + rep->init_section = av_mallocz(sizeof(struct fragment)); > >>> + if (!rep->init_section) { > >>> + xmlFree(initialization_val); > >>> + return AVERROR(ENOMEM); > >>> + } > >>> + rep->init_section->url = get_content_url(baseurl_nodes, 4, > >> rep_id_val, rep_bandwidth_val, initialization_val); > >>> + rep->init_section->size = -1; > >>> + xmlFree(initialization_val); > >>> + } > >>> + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar > >> *)"SegmentURL")) { > >>> + media_val = xmlGetProp(fragmenturl_node, "media"); > >>> + if (media_val) { > >>> + struct fragment *seg = av_mallocz(sizeof(struct > fragment)); > >>> + if (!seg) { > >>> + xmlFree(media_val); > >>> + return AVERROR(ENOMEM); > >>> + } > >>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, > >> rep_bandwidth_val, media_val); > >>> + seg->size = -1; > >>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg); > >>> + xmlFree(media_val); > >>> + } > >>> + } > >>> + > >>> + return 0; > >>> +} > >>> + > >>> +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct > >> representation *rep, > >>> + xmlNodePtr > >> fragment_timeline_node) > >>> +{ > >>> + xmlAttrPtr attr = NULL; > >>> + xmlChar *val = NULL; > >>> + > >>> + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar > >> *)"S")) { > >>> + struct timeline *tml = av_mallocz(sizeof(struct timeline)); > >>> + if (!tml) { > >>> + return AVERROR(ENOMEM); > >>> + } > >>> + attr = fragment_timeline_node->properties; > >>> + while (attr) { > >>> + val = xmlGetProp(fragment_timeline_node, attr->name); > >>> + > >>> + if (!val) { > >>> + av_log(s, AV_LOG_WARNING, "parse_manifest_ > segmenttimeline > >> attr->name = %s val is NULL\n", attr->name); > >>> + continue; > >>> + } > >>> + > >>> + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) { > >>> + tml->t = (int64_t)atoll((const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) { > >>> + tml->r =(int32_t) atoi((const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) { > >>> + tml->d = (int64_t)atoll((const char *)val); > >>> + rep->fragment_duration = (int64_t) atoll((const char > >> *)val); > >>> + } > >>> + attr = attr->next; > >>> + xmlFree(val); > >>> + } > >>> + dynarray_add(&rep->timelines, &rep->n_timelines, tml); > >>> + } > >>> + > >>> + return 0; > >>> +} > >>> + > >>> +static int parse_manifest_representation(AVFormatContext *s, const > >> char *url, > >>> + xmlNodePtr node, > >>> + xmlNodePtr adaptionset_node, > >>> + xmlNodePtr mpd_baseurl_node, > >>> + xmlNodePtr > >> period_baseurl_node, > >>> + xmlNodePtr > >> fragment_template_node, > >>> + xmlNodePtr > >> content_component_node, > >>> + xmlNodePtr > >> adaptionset_baseurl_node) > >>> +{ > >>> + int32_t ret = 0; > >>> + int32_t audio_rep_idx = 0; > >>> + int32_t video_rep_idx = 0; > >>> + char *temp_string = NULL; > >>> + DASHContext *c = s->priv_data; > >>> + struct representation *rep = NULL; > >>> + struct fragment *seg = NULL; > >>> + xmlNodePtr representation_segmenttemplate_node = NULL; > >>> + xmlNodePtr representation_baseurl_node = NULL; > >>> + xmlNodePtr representation_segmentlist_node = NULL; > >>> + xmlNodePtr fragment_timeline_node = NULL; > >>> + xmlNodePtr fragment_templates_tab[2]; > >>> + xmlChar *duration_val = NULL; > >>> + xmlChar *startnumber_val = NULL; > >>> + xmlChar *timescale_val = NULL; > >>> + xmlChar *initialization_val = NULL; > >>> + xmlChar *media_val = NULL; > >>> + xmlNodePtr baseurl_nodes[4]; > >>> + xmlNodePtr representation_node = node; > >>> + xmlChar *rep_id_val = xmlGetProp(representation_node, "id"); > >>> + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, > >> "bandwidth"); > >>> + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; > >>> + > >>> + // try get information from representation > >>> + if (type == AVMEDIA_TYPE_UNKNOWN) > >>> + type = get_content_type(representation_node); > >>> + // try get information from contentComponen > >>> + if (type == AVMEDIA_TYPE_UNKNOWN) > >>> + type = get_content_type(content_component_node); > >>> + // try get information from adaption set > >>> + if (type == AVMEDIA_TYPE_UNKNOWN) > >>> + type = get_content_type(adaptionset_node); > >>> + if (type == AVMEDIA_TYPE_UNKNOWN) { > >>> + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported > >> representation type\n", url); > >>> + } else if ((type == AVMEDIA_TYPE_VIDEO && ((c->video_rep_index < 0 > >> && !c->cur_video) || > >>> + video_rep_idx == > >> (int32_t)c->video_rep_index )) || > >>> + (type == AVMEDIA_TYPE_AUDIO && ((c->audio_rep_index < > 0 > >> && !c->cur_audio) || > >>> + audio_rep_idx == > >> (int32_t)c->audio_rep_index ))) { > >>> + // convert selected representation to our internal struct > >>> + rep = av_mallocz(sizeof(struct representation)); > >>> + if (!rep) { > >>> + ret = AVERROR(ENOMEM); > >>> + goto end; > >>> + } > >>> + representation_segmenttemplate_node = findChildNodeByName( > representation_node, > >> "SegmentTemplate"); > >>> + representation_baseurl_node = findChildNodeByName( > representation_node, > >> "BaseURL"); > >>> + representation_segmentlist_node = findChildNodeByName( > representation_node, > >> "SegmentList"); > >>> + reset_packet(&rep->pkt); > >>> + > >>> + baseurl_nodes[0] = mpd_baseurl_node; > >>> + baseurl_nodes[1] = period_baseurl_node; > >>> + baseurl_nodes[2] = adaptionset_baseurl_node; > >>> + baseurl_nodes[3] = representation_baseurl_node; > >>> + > >>> + if (representation_segmenttemplate_node || > >> fragment_template_node) { > >>> + fragment_timeline_node = NULL; > >>> + fragment_templates_tab[0] = representation_ > >> segmenttemplate_node; > >>> + fragment_templates_tab[1] = fragment_template_node; > >>> + > >>> + duration_val = get_val_from_nodes_tab( > fragment_templates_tab, > >> 2, "duration"); > >>> + startnumber_val = get_val_from_nodes_tab( > fragment_templates_tab, > >> 2, "startNumber"); > >>> + timescale_val = get_val_from_nodes_tab( > fragment_templates_tab, > >> 2, "timescale"); > >>> + initialization_val = get_val_from_nodes_tab( > fragment_templates_tab, > >> 2, "initialization"); > >>> + media_val = get_val_from_nodes_tab( > fragment_templates_tab, > >> 2, "media"); > >>> + > >>> + if (initialization_val) { > >>> + rep->init_section = av_mallocz(sizeof(struct > fragment)); > >>> + if (!rep->init_section) { > >>> + av_free(rep); > >>> + ret = AVERROR(ENOMEM); > >>> + goto end; > >>> + } > >>> + rep->init_section->url = > get_content_url(baseurl_nodes, > >> 4, rep_id_val, rep_bandwidth_val, initialization_val); > >>> + rep->init_section->size = -1; > >>> + xmlFree(initialization_val); > >>> + } > >>> + > >>> + if (media_val) { > >>> + temp_string = get_content_url(baseurl_nodes, 4, > >> rep_id_val, rep_bandwidth_val, media_val); > >>> + if (temp_string) { > >>> + if (av_stristr(temp_string, "$Number")) { > >>> + rep->url_template = replace_template_str(temp_ > string, > >> "$Number$"); > >>> + /* A URL template is provided from which > >> clients build a chunk list > >>> + * where the chunk URLs include chunk numbers > >> (like index numbers). > >>> + */ > >>> + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* > >> Number-Based. */ > >>> + } else if (av_stristr(temp_string, "$Time")) { > >>> + rep->url_template = replace_template_str(temp_ > string, > >> "$Time$"); > >>> + /* A URL template is provided from which > >> clients build a chunk list > >>> + * where the chunk URLs include chunk start > >> times. > >>> + */ > >>> + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* > >> Time-Based. */ > >>> + } else { > >>> + rep->url_template = temp_string; > >>> + temp_string = NULL; > >>> + } > >>> + av_free(temp_string); > >>> + } > >>> + xmlFree(media_val); > >>> + } > >>> + if (duration_val) { > >>> + rep->fragment_duration = (int64_t) atoll((const char > >> *)duration_val); > >>> + xmlFree(duration_val); > >>> + } > >>> + if (timescale_val) { > >>> + rep->fragment_timescale = (int64_t) atoll((const char > >> *)timescale_val); > >>> + xmlFree(timescale_val); > >>> + } > >>> + if (startnumber_val) { > >>> + rep->first_seq_no = (int64_t) atoll((const char > >> *)startnumber_val); > >>> + xmlFree(startnumber_val); > >>> + } > >>> + > >>> + fragment_timeline_node = findChildNodeByName( > >> representation_segmenttemplate_node, "SegmentTimeline"); > >>> + > >>> + if (!fragment_timeline_node) > >>> + fragment_timeline_node = findChildNodeByName(fragment_ > template_node, > >> "SegmentTimeline"); > >>> + if (fragment_timeline_node) { > >>> + fragment_timeline_node = > xmlFirstElementChild(fragment_ > >> timeline_node); > >>> + while (fragment_timeline_node) { > >>> + ret = parse_manifest_segmenttimeline(s, rep, > >> fragment_timeline_node); > >>> + if (ret < 0) { > >>> + return ret; > >>> + } > >>> + fragment_timeline_node = xmlNextElementSibling( > >> fragment_timeline_node); > >>> + } > >>> + } > >>> + } else if (representation_baseurl_node && > >> !representation_segmentlist_node) { > >>> + seg = av_mallocz(sizeof(struct fragment)); > >>> + if (!seg) { > >>> + ret = AVERROR(ENOMEM); > >>> + goto end; > >>> + } > >>> + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, > >> rep_bandwidth_val, NULL); > >>> + seg->size = -1; > >>> + dynarray_add(&rep->fragments, &rep->n_fragments, seg); > >>> + } else if (!representation_baseurl_node && > >> representation_segmentlist_node) { > >>> + // TODO: https://www.brendanlong.com/ > >> the-structure-of-an-mpeg-dash-mpd.html > >>> + // http://www-itec.uni-klu.ac.at/ > >> dash/ddash/mpdGenerator.php?fragmentlength=15&type=full > >>> + xmlNodePtr fragmenturl_node = NULL; > >>> + duration_val = xmlGetProp(representation_ > segmentlist_node, > >> "duration"); > >>> + timescale_val = xmlGetProp(representation_ > segmentlist_node, > >> "timescale"); > >>> + if (duration_val) { > >>> + rep->fragment_duration = (int64_t) atoll((const char > >> *)duration_val); > >>> + xmlFree(duration_val); > >>> + } > >>> + if (timescale_val) { > >>> + rep->fragment_timescale = (int64_t) atoll((const char > >> *)timescale_val); > >>> + xmlFree(timescale_val); > >>> + } > >>> + fragmenturl_node = xmlFirstElementChild( > >> representation_segmentlist_node); > >>> + while (fragmenturl_node) { > >>> + ret = parse_manifest_segmenturlnode(s, rep, > >> fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val); > >>> + if (ret < 0) { > >>> + return ret; > >>> + } > >>> + fragmenturl_node = xmlNextElementSibling( > >> fragmenturl_node); > >>> + } > >>> + } else { > >>> + free_representation(rep); > >>> + rep = NULL; > >>> + av_log(s, AV_LOG_ERROR, "Unknown format of Representation > >> node id[%s] \n", (const char *)rep_id_val); > >>> + } > >>> + > >>> + if (rep) { > >>> + if (rep->fragment_duration > 0 && > !rep->fragment_timescale) > >>> + rep->fragment_timescale = 1; > >>> + if (type == AVMEDIA_TYPE_VIDEO) { > >>> + rep->rep_idx = video_rep_idx; > >>> + c->cur_video = rep; > >>> + } else { > >>> + rep->rep_idx = audio_rep_idx; > >>> + c->cur_audio = rep; > >>> + } > >>> + } > >>> + } > >>> + > >>> + video_rep_idx += type == AVMEDIA_TYPE_VIDEO; > >>> + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO; > >>> + > >>> +end: > >>> + if (rep_id_val) > >>> + xmlFree(rep_id_val); > >>> + if (rep_bandwidth_val) > >>> + xmlFree(rep_bandwidth_val); > >>> + > >>> + return ret; > >>> +} > >>> + > >>> +static int parse_manifest_adaptationset(AVFormatContext *s, const > char > >> *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, > xmlNodePtr > >> period_baseurl_node) > >>> +{ > >>> + int ret = 0; > >>> + xmlNodePtr fragment_template_node = NULL; > >>> + xmlNodePtr content_component_node = NULL; > >>> + xmlNodePtr adaptionset_baseurl_node = NULL; > >>> + xmlNodePtr node = NULL; > >>> + > >>> + node = xmlFirstElementChild(adaptionset_node); > >>> + while (node) { > >>> + if (!xmlStrcmp(node->name, (const xmlChar > *)"SegmentTemplate")) > >> { > >>> + fragment_template_node = node; > >>> + } else if (!xmlStrcmp(node->name, (const xmlChar > >> *)"ContentComponent")) { > >>> + content_component_node = node; > >>> + } else if (!xmlStrcmp(node->name, (const xmlChar > *)"BaseURL")) { > >>> + adaptionset_baseurl_node = node; > >>> + } else if (!xmlStrcmp(node->name, (const xmlChar > >> *)"Representation")) { > >>> + ret = parse_manifest_representation(s, url, node, > >>> + adaptionset_node, > >>> + mpd_baseurl_node, > >>> + period_baseurl_node, > >>> + > fragment_template_node, > >>> + > content_component_node, > >>> + > >> adaptionset_baseurl_node); > >>> + if (ret < 0) { > >>> + return ret; > >>> + } > >>> + } > >>> + node = xmlNextElementSibling(node); > >>> + } > >>> + return 0; > >>> +} > >>> + > >>> + > >>> +static int parse_manifest(AVFormatContext *s, const char *url, > >> AVIOContext *in) > >>> +{ > >>> + DASHContext *c = s->priv_data; > >>> + int ret = 0; > >>> + int close_in = 0; > >>> + uint8_t *new_url = NULL; > >>> + int64_t filesize = 0; > >>> + char *buffer = NULL; > >>> + AVDictionary *opts = NULL; > >>> + xmlDoc *doc = NULL; > >>> + xmlNodePtr root_element = NULL; > >>> + xmlNodePtr node = NULL; > >>> + xmlNodePtr period_node = NULL; > >>> + xmlNodePtr mpd_baseurl_node = NULL; > >>> + xmlNodePtr period_baseurl_node = NULL; > >>> + xmlNodePtr adaptionset_node = NULL; > >>> + xmlAttrPtr attr = NULL; > >>> + xmlChar *val = NULL; > >>> + uint32_t perdiod_duration_sec = 0; > >>> + uint32_t perdiod_start_sec = 0; > >>> + int32_t audio_rep_idx = 0; > >>> + int32_t video_rep_idx = 0; > >>> + > >>> + if (!in) { > >>> + close_in = 1; > >>> + /* This is XML manifest there is no need to set range header > */ > >>> + av_dict_set(&opts, "seekable", "0", 0); > >>> + // broker prior HTTP options that should be consistent across > >> requests > >>> + av_dict_set(&opts, "user-agent", c->user_agent, 0); > >>> + av_dict_set(&opts, "cookies", c->cookies, 0); > >>> + av_dict_set(&opts, "headers", c->headers, 0); > >>> + > >>> + ret = avio_open2(&in, url, AVIO_FLAG_READ, > >> c->interrupt_callback, &opts); > >>> + av_dict_free(&opts); > >>> + if (ret < 0) > >>> + return ret; > >>> + } > >>> + > >>> + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) > >= > >> 0) { > >>> + c->base_url = av_strdup(new_url); > >>> + } else { > >>> + c->base_url = av_strdup(url); > >>> + } > >>> + > >>> + filesize = avio_size(in); > >>> + if (filesize <= 0){ > >>> + filesize = 8 * 1024; > >>> + } > >>> + > >>> + buffer = av_mallocz(filesize); > >>> + if (!buffer) { > >>> + return AVERROR(ENOMEM); > >>> + } > >>> + > >>> + filesize = avio_read(in, buffer, filesize); > >>> + if (filesize > 0) { > >>> + LIBXML_TEST_VERSION > >>> + > >>> + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0); > >>> + root_element = xmlDocGetRootElement(doc); > >>> + node = root_element; > >>> + > >>> + if (!node) { > >>> + ret = AVERROR_INVALIDDATA; > >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing > >> root node\n", url); > >>> + goto cleanup; > >>> + } > >>> + > >>> + if (node->type != XML_ELEMENT_NODE || > >>> + xmlStrcmp(node->name, (const xmlChar *)"MPD")) { > >>> + ret = AVERROR_INVALIDDATA; > >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root > >> node name[%s] type[%d]\n", url, node->name, (int)node->type); > >>> + goto cleanup; > >>> + } > >>> + > >>> + val = xmlGetProp(node, "type"); > >>> + if (!val) { > >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing > >> type attrib\n", url); > >>> + ret = AVERROR_INVALIDDATA; > >>> + goto cleanup; > >>> + } > >>> + if (!xmlStrcmp(val, (const xmlChar *)"dynamic")) > >>> + c->is_live = 1; > >>> + xmlFree(val); > >>> + > >>> + attr = node->properties; > >>> + while (attr) { > >>> + val = xmlGetProp(node, attr->name); > >>> + > >>> + if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"availabilityStartTime")) { > >>> + c->availability_start_time_sec = > GetUTCDateTimeInSec(s, > >> (const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"publishTime")) { > >>> + c->publish_time_sec = GetUTCDateTimeInSec(s, (const > >> char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"minimumUpdatePeriod")) { > >>> + c->minimum_update_period_sec = GetDurationInSec(s, > >> (const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"timeShiftBufferDepth")) { > >>> + c->time_shift_buffer_depth_sec = GetDurationInSec(s, > >> (const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"minBufferTime")) { > >>> + c->min_buffer_time_sec = GetDurationInSec(s, (const > >> char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"suggestedPresentationDelay")) { > >>> + c->suggested_presentation_delay_sec = > >> GetDurationInSec(s, (const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"mediaPresentationDuration")) { > >>> + c->media_presentation_duration_sec = > >> GetDurationInSec(s, (const char *)val); > >>> + } > >>> + attr = attr->next; > >>> + xmlFree(val); > >>> + } > >>> + > >>> + mpd_baseurl_node = findChildNodeByName(node, "BaseURL"); > >>> + > >>> + // at now we can handle only one period, with the longest > >> duration > >>> + node = xmlFirstElementChild(node); > >>> + while (node) { > >>> + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) { > >>> + perdiod_duration_sec = 0; > >>> + perdiod_start_sec = 0; > >>> + attr = node->properties; > >>> + while (attr) { > >>> + val = xmlGetProp(node, attr->name); > >>> + if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"duration")) { > >>> + perdiod_duration_sec = GetDurationInSec(s, > >> (const char *)val); > >>> + } else if (!xmlStrcmp(attr->name, (const xmlChar > >> *)"start")) { > >>> + perdiod_start_sec = GetDurationInSec(s, (const > >> char *)val); > >>> + } > >>> + attr = attr->next; > >>> + xmlFree(val); > >>> + } > >>> + if ((perdiod_duration_sec) >= > (c->period_duration_sec)) > >> { > >>> + period_node = node; > >>> + c->period_duration_sec = perdiod_duration_sec; > >>> + c->period_start_sec = perdiod_start_sec; > >>> + if (c->period_start_sec > 0) > >>> + c->media_presentation_duration_sec = > >> c->period_duration_sec; > >>> + } > >>> + } > >>> + node = xmlNextElementSibling(node); > >>> + } > >>> + if (!period_node) { > >>> + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing > >> Period node\n", url); > >>> + ret = AVERROR_INVALIDDATA; > >>> + goto cleanup; > >>> + } > >>> + // explore AdaptationSet > >>> + adaptionset_node = xmlFirstElementChild(period_node); > >>> + while (adaptionset_node) { > >>> + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar > >> *)"BaseURL")) { > >>> + period_baseurl_node = adaptionset_node; > >>> + } else if (!xmlStrcmp(adaptionset_node->name, (const > >> xmlChar *)"AdaptationSet")) { > >>> + parse_manifest_adaptationset(s, url, > adaptionset_node, > >> mpd_baseurl_node, period_baseurl_node); > >>> + } > >>> + adaptionset_node = xmlNextElementSibling( > adaptionset_node); > >>> + } > >>> + if (c->cur_video) { > >>> + c->cur_video->rep_count = video_rep_idx; > >>> + c->cur_video->fix_multiple_stsd_order = 1; > >>> + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", > >> (int)c->cur_video->rep_idx); > >>> + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", > >> (int)video_rep_idx); > >>> + } > >>> + if (c->cur_audio) { > >>> + c->cur_audio->rep_count = audio_rep_idx; > >>> + } > >>> + > >>> +cleanup: > >>> + /*free the document */ > >>> + xmlFreeDoc(doc); > >>> + xmlCleanupParser(); > >>> + } else { > >>> + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", > url); > >>> + ret = AVERROR_INVALIDDATA; > >>> + } > >>> + > >>> + av_free(new_url); > >>> + av_free(buffer); > >>> + if (close_in) { > >>> + avio_close(in); > >>> + } > >>> + return ret; > >>> +} > >>> + > >>> +static int64_t calc_cur_seg_no(AVFormatContext *s, struct > >> representation *pls) > >>> +{ > >>> + DASHContext *c = pls->parent->priv_data; > >>> + int64_t num = 0; > >>> + > >>> + if (c->is_live) { > >>> + if (!pls->fragment_duration) { > >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration > >> value in live mode\n"); > >>> + return pls->first_seq_no; > >>> + } > >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() - > >> c->availability_start_time_sec) - c->presentation_delay_sec) * > >> pls->fragment_timescale) / pls->fragment_duration; > >>> + } else { > >>> + num = pls->first_seq_no; > >>> + } > >>> + return num; > >>> +} > >>> + > >>> +static int64_t calc_min_seg_no(AVFormatContext *s, struct > >> representation *pls) > >>> +{ > >>> + DASHContext *c = pls->parent->priv_data; > >>> + int64_t num = 0; > >>> + > >>> + if (c->is_live) { > >>> + if (!pls->fragment_duration) { > >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration > >> value in live mode\n"); > >>> + return pls->first_seq_no; > >>> + } > >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() - > >> c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) * > >> pls->fragment_timescale) / pls->fragment_duration; > >>> + } else { > >>> + num = pls->first_seq_no; > >>> + } > >>> + return num; > >>> +} > >>> + > >>> +static int64_t calc_max_seg_no(AVFormatContext *s, struct > >> representation *pls) > >>> +{ > >>> + DASHContext *c = pls->parent->priv_data; > >>> + int64_t num = 0; > >>> + int64_t i = 0; > >>> + > >>> + if (c->is_live) { > >>> + if (!pls->fragment_duration) { > >>> + av_log(s, AV_LOG_ERROR, "Get not get fragment duration > >> value in live mode\n"); > >>> + return pls->first_seq_no; > >>> + } > >>> + num = pls->first_seq_no + (((GetCurrentTimeInSec() - > >> c->availability_start_time_sec)) * pls->fragment_timescale) / > >> pls->fragment_duration; > >>> + } else { > >>> + if (pls->n_fragments) { > >>> + num = pls->first_seq_no + pls->n_fragments - 1; > >>> + } else if (pls->n_timelines) { > >>> + num = pls->first_seq_no + pls->n_timelines - 1; > >>> + for (i = 0; i < pls->n_timelines; ++i) { > >>> + num += pls->timelines[i]->r; > >>> + } > >>> + } else { > >>> + num = pls->first_seq_no + (c->media_presentation_ > duration_sec > >> * pls->fragment_timescale) / pls->fragment_duration; > >>> + } > >>> + } > >>> + > >>> + return num; > >>> +} > >>> + > >>> +static int64_t get_fragment_start_time(struct representation *pls, > >> int64_t cur_seq_no) > >>> +{ > >>> + int64_t i = 0; > >>> + int64_t j = 0; > >>> + int64_t num = 0; > >>> + int64_t startTime = 0; > >>> + > >>> + if (pls->n_timelines) { > >>> + for (i = 0; i < pls->n_timelines; ++i) { > >>> + if (pls->timelines[i]->t > 0) { > >>> + startTime = pls->timelines[i]->t; > >>> + } > >>> + if (num == cur_seq_no) > >>> + goto finish; > >>> + startTime += pls->timelines[i]->d; > >>> + for (j = 0; j < pls->timelines[i]->r; ++j) { > >>> + num++; > >>> + if (num == cur_seq_no) > >>> + goto finish; > >>> + startTime += pls->timelines[i]->d; > >>> + } > >>> + num++; > >>> + } > >>> + } > >>> + > >>> +finish: > >>> + return startTime; > >>> +} > >>> + > >>> +static struct fragment *get_current_fragment(struct representation > *pls) > >>> +{ > >>> + int64_t min_seq_no = 0; > >>> + int64_t max_seq_no = 0; > >>> + char *tmp_str = NULL; > >>> + struct fragment *seg = NULL; > >>> + struct fragment *seg_ptr = NULL; > >>> + DASHContext *c = pls->parent->priv_data; > >>> + > >>> + if (pls->n_fragments > 0) { > >>> + if (pls->cur_seq_no < pls->n_fragments) { > >>> + seg_ptr = pls->fragments[pls->cur_seq_no]; > >>> + seg = av_mallocz(sizeof(struct fragment)); > >>> + if (!seg) { > >>> + return NULL; > >>> + } > >>> + seg->url = av_strdup(seg_ptr->url); > >>> + if (!seg->url) { > >>> + av_free(seg); > >>> + return NULL; > >>> + } > >>> + seg->size = seg_ptr->size; > >>> + seg->url_offset = seg_ptr->url_offset; > >>> + return seg; > >>> + } > >>> + } > >>> + if (c->is_live) { > >>> + while (1) { > >>> + min_seq_no = calc_min_seg_no(pls->parent, pls); > >>> + max_seq_no = calc_max_seg_no(pls->parent, pls); > >>> + > >>> + if (pls->cur_seq_no <= min_seq_no) { > >>> + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: > >> cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", > >>> + (int64_t)pls->cur_seq_no, min_seq_no, > >> max_seq_no, (int)pls->rep_idx); > >>> + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls); > >>> + } else if (pls->cur_seq_no > max_seq_no) { > >>> + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: > >> min[%"PRId64"] max[%"PRId64"], playlist %d\n", > >>> + min_seq_no, max_seq_no, (int)pls->rep_idx); > >>> + av_usleep(1000); > >>> + continue; > >>> + } > >>> + break; > >>> + } > >>> + seg = av_mallocz(sizeof(struct fragment)); > >>> + if (!seg) { > >>> + return NULL; > >>> + } > >>> + } else if (pls->cur_seq_no <= pls->last_seq_no) { > >>> + seg = av_mallocz(sizeof(struct fragment)); > >>> + if (!seg) { > >>> + return NULL; > >>> + } > >>> + } > >>> + if (seg) { > >>> + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) { > >>> + int64_t tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER > >> ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no); > >>> + tmp_str = av_asprintf(pls->url_template, > (int64_t)tmp_val); > >> > >> Still no. Do not use ANY printf-family function with any user input as > the > >> format-string argument. > >> > > Can you give some suggestion to make similar function: > > av_asprintf(pls->url_template, > > (int64_t)tmp_val); the url_template is looks like " > > chunk-stream0-%lld.m4s". > > Delay the strreplace call until get_current_fragment, and rather than > replacing with a printf formatter, just insert the actual value at that > point. > av_asprintf is defined by ffmpeg, and the tmp_val is get from calc* , why cannot use here? I saw segment and some other segment list is use av_asprintf, is this mean those should modify? the strreplace is used for replace template,not be used for get to change the value of the tmp_val. > > > > >> Also, the cast here doesn't make sense. > >> > >>> + seg->url = av_strdup(tmp_str); > >>> + if (!seg->url) { > >>> + av_free(tmp_str); > >>> + return NULL; > >>> + } > >>> + } else { > >>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to > >> resolve template url '%s'\n", pls->url_template); > >>> + seg->url = av_strdup(pls->url_template); > >>> + if (!seg->url) { > >>> + return NULL; > >>> + } > >>> + } > >>> + seg->size = -1; > >>> + } > >>> + > >>> + av_free(tmp_str); > >>> + return seg; > >>> +} > >>> + > >>> +enum ReadFromURLMode { > >>> + READ_NORMAL, > >>> + READ_COMPLETE, > >>> +}; > >>> + > >>> +static int read_from_url(struct representation *pls, struct fragment > >> *seg, > >>> + uint8_t *buf, int buf_size, > >>> + enum ReadFromURLMode mode) > >>> +{ > >>> + int ret; > >>> + > >>> + /* limit read if the fragment was only a part of a file */ > >>> + if (seg->size >= 0) > >>> + buf_size = FFMIN(buf_size, pls->cur_seg_size - > >> pls->cur_seg_offset); > >>> + > >>> + if (mode == READ_COMPLETE) { > >>> + ret = avio_read(pls->input, buf, buf_size); > >>> + if (ret < buf_size) { > >>> + av_log(pls->parent, AV_LOG_WARNING, "Could not read > >> complete fragment.\n"); > >>> + } > >>> + } else { > >>> + ret = avio_read(pls->input, buf, buf_size); > >>> + } > >>> + if (ret > 0) > >>> + pls->cur_seg_offset += ret; > >>> + > >>> + return ret; > >>> +} > >>> + > >>> +static int open_input(DASHContext *c, struct representation *pls, > >> struct fragment *seg) > >>> +{ > >>> + AVDictionary *opts = NULL; > >>> + char url[MAX_URL_SIZE]; > >>> + int ret; > >>> + > >>> + // broker prior HTTP options that should be consistent across > >> requests > >>> + av_dict_set(&opts, "user-agent", c->user_agent, 0); > >>> + av_dict_set(&opts, "cookies", c->cookies, 0); > >>> + av_dict_set(&opts, "headers", c->headers, 0); > >>> + if (c->is_live) { > >>> + av_dict_set(&opts, "seekable", "0", 0); > >>> + } > >>> + > >>> + if (seg->size >= 0) { > >>> + /* try to restrict the HTTP request to the part we want > >>> + * (if this is in fact a HTTP request) */ > >>> + av_dict_set_int(&opts, "offset", seg->url_offset, 0); > >>> + av_dict_set_int(&opts, "end_offset", seg->url_offset + > >> seg->size, 0); > >>> + } > >>> + > >>> + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url); > >>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', > >> offset %"PRId64", playlist %d\n", > >>> + url, seg->url_offset, pls->rep_idx); > >>> + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, > >> NULL); > >>> + if (ret < 0) { > >>> + goto cleanup; > >>> + } > >>> + > >>> + /* Seek to the requested position. If this was a HTTP request, the > >> offset > >>> + * should already be where want it to, but this allows e.g. local > >> testing > >>> + * without a HTTP server. */ > >>> + if (!ret && seg->url_offset) { > >>> + int64_t seekret = avio_seek(pls->input, seg->url_offset, > >> SEEK_SET); > >>> + if (seekret < 0) { > >>> + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to > offset > >> %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url); > >>> + ret = (int) seekret; > >>> + ff_format_io_close(pls->parent, &pls->input); > >>> + } > >>> + } > >>> + > >>> +cleanup: > >>> + av_dict_free(&opts); > >>> + pls->cur_seg_offset = 0; > >>> + pls->cur_seg_size = seg->size; > >>> + return ret; > >>> +} > >>> + > >>> +static int update_init_section(struct representation *pls) > >>> +{ > >>> + static const int max_init_section_size = 1024*1024; > >>> + DASHContext *c = pls->parent->priv_data; > >>> + int64_t sec_size = 0; > >>> + int64_t urlsize = 0; > >>> + int ret = 0; > >>> + > >>> + /* read init section only once per representation */ > >>> + if (!pls->init_section || pls->init_sec_buf) { > >>> + return 0; > >>> + } > >>> + > >>> + ret = open_input(c, pls, pls->init_section); > >>> + if (ret < 0) { > >>> + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an > >> initialization section in playlist %d\n", pls->rep_idx); > >>> + return ret; > >>> + } > >>> + > >>> + if (pls->init_section->size >= 0) { > >>> + sec_size = pls->init_section->size; > >>> + } else if ((urlsize = avio_size(pls->input)) >= 0) { > >>> + sec_size = urlsize; > >>> + } else { > >>> + sec_size = max_init_section_size; > >>> + } > >>> + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization > >> section of size %"PRId64"\n", sec_size); > >>> + sec_size = FFMIN(sec_size, max_init_section_size); > >>> + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, > >> sec_size); > >>> + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, > >> pls->init_sec_buf_size, READ_COMPLETE); > >>> + ff_format_io_close(pls->parent, &pls->input); > >>> + if (ret < 0) > >>> + return ret; > >>> + > >>> + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) { > >>> + uint8_t **stsd_entries = NULL; > >>> + int *stsd_entries_size = NULL; > >>> + int i = 4; > >>> + > >>> + while (i <= (ret - 4)) { > >>> + // find start stsd atom > >>> + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) { > >>> + /* 1B version > >>> + * 3B flags > >>> + * 4B num of entries */ > >>> + int stsd_first_offset = i + 8; > >>> + int stsd_offset = 0; > >>> + int j = 0; > >>> + uint32_t stsd_count = AV_RB32(pls->init_sec_buf + > >> stsd_first_offset); > >>> + stsd_first_offset += 4; > >>> + if (stsd_count != pls->rep_count) { > >>> + i++; > >>> + continue; > >>> + } > >>> + // find all stsd entries > >>> + stsd_entries = av_mallocz_array(stsd_count, > >> sizeof(*stsd_entries)); > >>> + stsd_entries_size = av_mallocz_array(stsd_count, > >> sizeof(*stsd_entries_size)); > >>> + for (j = 0; j < stsd_count; ++j) { > >>> + /* 4B - size > >>> + * 4B - format */ > >>> + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + > >> stsd_first_offset + stsd_offset); > >>> + stsd_entries[j] = av_malloc(stsd_entries_size[j] > ); > >>> + memcpy(stsd_entries[j], pls->init_sec_buf + > >> stsd_first_offset + stsd_offset, stsd_entries_size[j]); > >>> + stsd_offset += stsd_entries_size[j]; > >>> + } > >>> + // reorder stsd entries > >>> + // as first put stsd entry for current representation > >>> + j = pls->rep_idx; > >>> + stsd_offset = stsd_first_offset; > >>> + memcpy(pls->init_sec_buf + stsd_offset, > >> stsd_entries[j], stsd_entries_size[j]); > >>> + stsd_offset += stsd_entries_size[j]; > >>> + for (j = 0; j < stsd_count; ++j) { > >>> + if (j != pls->rep_idx) { > >>> + memcpy(pls->init_sec_buf + stsd_offset, > >> stsd_entries[j], stsd_entries_size[j]); > >>> + stsd_offset += stsd_entries_size[j]; > >>> + } > >>> + av_free(stsd_entries[j]); > >>> + } > >>> + av_freep(&stsd_entries); > >>> + av_freep(&stsd_entries_size); > >>> + break; > >>> + } > >>> + i++; > >>> + } > >>> + } > >>> + > >>> + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section > >> size[%d]\n", pls, (int)ret); > >>> + pls->init_sec_data_len = ret; > >>> + pls->init_sec_buf_read_offset = 0; > >>> + > >>> + return 0; > >>> +} > >>> + > >>> +static int64_t seek_data(void *opaque, int64_t offset, int whence) > >>> +{ > >>> + struct representation *v = opaque; > >>> + if (v->n_fragments && !v->init_sec_data_len) { > >>> + return avio_seek(v->input, offset, whence); > >>> + } > >>> + > >>> + return AVERROR(ENOSYS); > >>> +} > >>> + > >>> +static int read_data(void *opaque, uint8_t *buf, int buf_size) > >>> +{ > >>> + int ret = 0; > >>> + struct representation *v = opaque; > >>> + DASHContext *c = v->parent->priv_data; > >>> + > >>> +restart: > >>> + if (!v->input) { > >>> + free_fragment(&v->cur_seg); > >>> + v->cur_seg = get_current_fragment(v); > >>> + if (!v->cur_seg) { > >>> + ret = AVERROR_EOF; > >>> + goto end; > >>> + } > >>> + > >>> + /* load/update Media Initialization Section, if any */ > >>> + ret = update_init_section(v); > >>> + if (ret) > >>> + goto end; > >>> + > >>> + ret = open_input(c, v, v->cur_seg); > >>> + if (ret < 0) { > >>> + if (ff_check_interrupt(c->interrupt_callback)) { > >>> + goto end; > >>> + ret = AVERROR_EXIT; > >>> + } > >>> + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment > >> of playlist %d\n", v->rep_idx); > >>> + v->cur_seq_no++; > >>> + goto restart; > >>> + } > >>> + } > >>> + > >>> + if (v->init_sec_buf_read_offset < v->init_sec_data_len) { > >>> + /* Push init section out first before first actual fragment */ > >>> + int copy_size = FFMIN(v->init_sec_data_len - > >> v->init_sec_buf_read_offset, buf_size); > >>> + memcpy(buf, v->init_sec_buf, copy_size); > >>> + v->init_sec_buf_read_offset += copy_size; > >>> + ret = copy_size; > >>> + goto end; > >>> + } > >>> + > >>> + /* check the v->cur_seg, if it is null, get current and double > >> check if the new v->cur_seg*/ > >>> + if (!v->cur_seg) { > >>> + v->cur_seg = get_current_fragment(v); > >>> + } > >>> + if (!v->cur_seg) { > >>> + ret = AVERROR_EOF; > >>> + goto end; > >>> + } > >>> + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL); > >>> + if (ret > 0) > >>> + goto end; > >>> + ff_format_io_close(v->parent, &v->input); > >>> + v->cur_seq_no++; > >>> + goto restart; > >>> + > >>> +end: > >>> + return ret; > >>> +} > >>> + > >>> +static int save_avio_options(AVFormatContext *s) > >>> +{ > >>> + DASHContext *c = s->priv_data; > >>> + const char *opts[] = { "headers", "user_agent", "user-agent", > >> "cookies", NULL }, **opt = opts; > >>> + uint8_t *buf = NULL; > >>> + int ret = 0; > >>> + > >>> + while (*opt) { > >>> + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= > 0) > >> { > >>> + if (buf) { > >>> + ret = av_dict_set(&c->avio_opts, *opt, buf, > >> AV_DICT_DONT_STRDUP_VAL); > >>> + if (ret < 0) > >>> + return ret; > >>> + } > >>> + } > >>> + opt++; > >>> + } > >>> + > >>> + return ret; > >>> +} > >>> + > >>> +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const > >> char *url, > >>> + int flags, AVDictionary **opts) > >>> +{ > >>> + av_log(s, AV_LOG_ERROR, > >>> + "A HDS playlist item '%s' referred to an external file > '%s'. > >> " > >>> + "Opening this file was forbidden for security reasons\n", > >>> + s->filename, url); > >>> + return AVERROR(EPERM); > >>> +} > >>> + > >>> +static int reopen_demux_for_component(AVFormatContext *s, struct > >> representation *pls) > >>> +{ > >>> + DASHContext *c = s->priv_data; > >>> + AVInputFormat *in_fmt = NULL; > >>> + AVDictionary *in_fmt_opts = NULL; > >>> + uint8_t *avio_ctx_buffer = NULL; > >>> + int ret = 0; > >>> + > >>> + if (pls->ctx) { > >>> + /* note: the internal buffer could have changed, and be != > >> avio_ctx_buffer */ > >>> + av_freep(&pls->pb.buffer); > >>> + memset(&pls->pb, 0x00, sizeof(AVIOContext)); > >>> + pls->ctx->pb = NULL; > >>> + avformat_close_input(&pls->ctx); > >>> + pls->ctx = NULL; > >>> + } > >>> + if (!(pls->ctx = avformat_alloc_context())) { > >>> + ret = AVERROR(ENOMEM); > >>> + goto fail; > >>> + } > >>> + > >>> + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE); > >>> + if (!avio_ctx_buffer ){ > >>> + ret = AVERROR(ENOMEM); > >>> + avformat_free_context(pls->ctx); > >>> + pls->ctx = NULL; > >>> + goto fail; > >>> + } > >>> + if (c->is_live) { > >>> + ffio_init_context(&pls->pb, avio_ctx_buffer , > >> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL); > >>> + } else { > >>> + ffio_init_context(&pls->pb, avio_ctx_buffer , > >> INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data); > >>> + } > >>> + pls->pb.seekable = 0; > >>> + > >>> + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0) > >>> + goto fail; > >>> + > >>> + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO; > >>> + pls->ctx->probesize = 1024 * 4; > >>> + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE; > >>> + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0); > >>> + if (ret < 0) { > >>> + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, > >> playlist %d\n", (int)pls->rep_idx); > >>> + avformat_free_context(pls->ctx); > >>> + pls->ctx = NULL; > >>> + goto fail; > >>> + } > >>> + > >>> + pls->ctx->pb = &pls->pb; > >>> + pls->ctx->io_open = nested_io_open; > >>> + > >>> + // provide additional information from mpd if available > >>> + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); > >> //pls->init_section->url > >>> + av_dict_free(&in_fmt_opts); > >>> + if (ret < 0) > >>> + goto fail; > >>> + if (pls->n_fragments) { > >>> + ret = avformat_find_stream_info(pls->ctx, NULL); > >>> + if (ret < 0) > >>> + goto fail; > >>> + } > >>> + > >>> +fail: > >>> + return ret; > >>> +} > >>> + > >>> +static int open_demux_for_component(AVFormatContext *s, struct > >> representation *pls) > >>> +{ > >>> + int ret = 0; > >>> + int i; > >>> + > >>> + pls->parent = s; > >>> + pls->cur_seq_no = calc_cur_seg_no(s, pls); > >>> + pls->last_seq_no = calc_max_seg_no(s, pls); > >>> + > >>> + ret = reopen_demux_for_component(s, pls); > >>> + if (ret < 0) { > >>> + goto fail; > >>> + } > >>> + for (i = 0; i < pls->ctx->nb_streams; i++) { > >>> + AVStream *st = avformat_new_stream(s, NULL); > >>> + AVStream *ist = pls->ctx->streams[i]; > >>> + if (!st) { > >>> + ret = AVERROR(ENOMEM); > >>> + goto fail; > >>> + } > >>> + st->id = i; > >>> + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]-> > >> codecpar); > >>> + avpriv_set_pts_info(st, ist->pts_wrap_bits, > ist->time_base.num, > >> ist->time_base.den); > >>> + } > >>> + > >>> + return 0; > >>> +fail: > >>> + return ret; > >>> +} > >>> + > >>> +static int dash_read_header(AVFormatContext *s) > >>> +{ > >>> + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; > >>> + DASHContext *c = s->priv_data; > >>> + int ret = 0; > >>> + int stream_index = 0; > >>> + > >>> + c->interrupt_callback = &s->interrupt_callback; > >>> + // if the URL context is good, read important options we must > >> broker later > >>> + if (u) { > >>> + update_options(&c->user_agent, "user-agent", u); > >>> + update_options(&c->cookies, "cookies", u); > >>> + update_options(&c->headers, "headers", u); > >>> + } > >>> + > >>> + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0) > >>> + goto fail; > >>> + > >>> + if ((ret = save_avio_options(s)) < 0) > >>> + goto fail; > >>> + > >>> + /* If this isn't a live stream, fill the total duration of the > >>> + * stream. */ > >>> + if (!c->is_live) { > >>> + s->duration = (int64_t) c->media_presentation_duration_sec * > >> AV_TIME_BASE; > >>> + } > >>> + > >>> + /* Open the demuxer for curent video and current audio components > >> if available */ > >>> + if (!ret && c->cur_video) { > >>> + ret = open_demux_for_component(s, c->cur_video); > >>> + if (!ret) { > >>> + c->cur_video->stream_index = stream_index; > >>> + ++stream_index; > >>> + } else { > >>> + free_representation(c->cur_video); > >>> + c->cur_video = NULL; > >>> + } > >>> + } > >>> + > >>> + if (!ret && c->cur_audio) { > >>> + ret = open_demux_for_component(s, c->cur_audio); > >>> + if (!ret) { > >>> + c->cur_audio->stream_index = stream_index; > >>> + ++stream_index; > >>> + } else { > >>> + free_representation(c->cur_audio); > >>> + c->cur_audio = NULL; > >>> + } > >>> + } > >>> + > >>> + if (!stream_index) { > >>> + ret = AVERROR_INVALIDDATA; > >>> + goto fail; > >>> + } > >>> + > >>> + /* Create a program */ > >>> + if (!ret) { > >>> + AVProgram *program; > >>> + program = av_new_program(s, 0); > >>> + if (!program) { > >>> + goto fail; > >>> + } > >>> + > >>> + if (c->cur_video) { > >>> + av_program_add_stream_index(s, 0, > >> c->cur_video->stream_index); > >>> + } > >>> + > >>> + if (c->cur_audio) { > >>> + av_program_add_stream_index(s, 0, > >> c->cur_audio->stream_index); > >>> + } > >>> + } > >>> + > >>> + return 0; > >>> +fail: > >>> + return ret; > >>> +} > >>> + > >>> +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt) > >>> +{ > >>> + DASHContext *c = s->priv_data; > >>> + int ret = 0; > >>> + struct representation *cur = NULL; > >>> + > >>> + if (!c->cur_audio && !c->cur_video) { > >>> + return AVERROR_INVALIDDATA; > >>> + } > >>> + if (c->cur_audio && !c->cur_video) { > >>> + cur = c->cur_audio; > >>> + } else if (!c->cur_audio && c->cur_video) { > >>> + cur = c->cur_video; > >>> + } else if (c->cur_video->cur_timestamp < > >> c->cur_audio->cur_timestamp) { > >>> + cur = c->cur_video; > >>> + } else { > >>> + cur = c->cur_audio; > >>> + } > >>> + > >>> + if (cur->ctx) { > >>> + ret = av_read_frame(cur->ctx, &cur->pkt); > >>> + if (ret < 0) { > >>> + av_packet_unref(&cur->pkt); > >>> + } else { > >>> + /* If we got a packet, return it */ > >>> + *pkt = cur->pkt; > >>> + cur->cur_timestamp = av_rescale(pkt->pts, > >> (int64_t)cur->ctx->streams[0]->time_base.num * 90000, > >> cur->ctx->streams[0]->time_base.den); > >>> + pkt->stream_index = cur->stream_index; > >>> + reset_packet(&cur->pkt); > >>> + return 0; > >>> + } > >>> + } > >>> + return AVERROR_EOF; > >>> +} > >>> + > >>> +static int dash_close(AVFormatContext *s) > >>> +{ > >>> + DASHContext *c = s->priv_data; > >>> + > >>> + if (c->cur_audio) { > >>> + free_representation(c->cur_audio); > >>> + } > >>> + > >>> + if (c->cur_video) { > >>> + free_representation(c->cur_video); > >>> + } > >>> + > >>> + av_freep(&c->cookies); > >>> + av_freep(&c->user_agent); > >>> + av_dict_free(&c->avio_opts); > >>> + av_freep(&c->base_url); > >>> + return 0; > >>> +} > >>> + > >>> +static int dash_seek(AVFormatContext *s, struct representation *pls, > >> int64_t seek_pos_msec, int flags) > >>> +{ > >>> + int ret = 0; > >>> + int i = 0; > >>> + int j = 0; > >>> + int64_t duration = 0; > >>> + > >>> + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], > >> playlist %d\n", seek_pos_msec, pls->rep_idx); > >>> + > >>> + // single fragment mode > >>> + if (pls->n_fragments) { > >>> + pls->cur_timestamp = 0; > >>> + pls->cur_seg_offset = 0; > >>> + ff_read_frame_flush(pls->ctx); > >>> + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags); > >>> + } > >>> + > >>> + if (pls->input) > >>> + ff_format_io_close(pls->parent, &pls->input); > >>> + > >>> + // find the nearest fragment > >>> + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) { > >>> + int64_t num = pls->first_seq_no; > >>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with > >> SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist > >> %d.\n", > >>> + (int)pls->n_timelines, (int64_t)pls->last_seq_no, > >> (int)pls->rep_idx); > >>> + for (i = 0; i < pls->n_timelines; i++) { > >>> + if (pls->timelines[i]->t > 0) { > >>> + duration = pls->timelines[i]->t; > >>> + } > >>> + duration += pls->timelines[i]->d; > >>> + if (seek_pos_msec < ((duration * 1000) / > >> pls->fragment_timescale)) { > >>> + goto set_seq_num; > >>> + } > >>> + for (j = 0; j < pls->timelines[i]->r; j++) { > >>> + duration += pls->timelines[i]->d; > >>> + num++; > >>> + if (seek_pos_msec < ((duration * 1000) / > >> pls->fragment_timescale)) { > >>> + goto set_seq_num; > >>> + } > >>> + } > >>> + num++; > >>> + } > >>> + > >>> +set_seq_num: > >>> + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : > >> num; > >>> + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with > >> SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n", > >>> + (int64_t)pls->cur_seq_no, (int)pls->rep_idx); > >>> + } else if (pls->fragment_duration > 0) { > >>> + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * > >> pls->fragment_timescale) / pls->fragment_duration) / 1000; > >>> + } else { > >>> + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing > >> fragment_duration\n"); > >>> + pls->cur_seq_no = pls->first_seq_no; > >>> + } > >>> + pls->cur_timestamp = 0; > >>> + pls->cur_seg_offset = 0; > >>> + pls->init_sec_buf_read_offset = 0; > >>> + ret = reopen_demux_for_component(s, pls); > >>> + > >>> + return ret; > >>> +} > >>> + > >>> +static int dash_read_seek(AVFormatContext *s, int stream_index, > int64_t > >> timestamp, int flags) > >>> +{ > >>> + int ret = 0; > >>> + DASHContext *c = s->priv_data; > >>> + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000, > >>> + s->streams[stream_index]-> > >> time_base.den, > >>> + flags & AVSEEK_FLAG_BACKWARD > ? > >>> + AV_ROUND_DOWN : AV_ROUND_UP); > >>> + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live) > >>> + return AVERROR(ENOSYS); > >>> + if (c->cur_audio) { > >>> + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags); > >>> + } > >>> + if (!ret && c->cur_video) { > >>> + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags); > >>> + } > >>> + return ret; > >>> +} > >>> + > >>> +static int dash_probe(AVProbeData *p) > >>> +{ > >>> + if (!av_stristr(p->buf, "<MPD")) > >>> + return 0; > >>> + > >>> + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") || > >>> + av_stristr(p->buf, "dash:profile:isoff-live:2011") || > >>> + av_stristr(p->buf, "dash:profile:isoff-live:2012") || > >>> + av_stristr(p->buf, "dash:profile:isoff-main:2011")) { > >>> + return AVPROBE_SCORE_MAX; > >>> + } > >>> + if (av_stristr(p->buf, "dash:profile")) { > >>> + return AVPROBE_SCORE_MAX >> 1; > >>> + } > >>> + > >>> + return 0; > >>> +} > >>> + > >>> +#define OFFSET(x) offsetof(DASHContext, x) > >>> +#define FLAGS AV_OPT_FLAG_DECODING_PARAM > >>> +static const AVOption dash_options[] = { > >>> + {"audio_rep_index", "audio representation index to be used", > >> OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, > >> FLAGS}, > >>> + {"video_rep_index", "video representation index to be used", > >> OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, > >> FLAGS}, > >>> + {NULL} > >>> +}; > >>> + > >>> +static const AVClass dash_class = { > >>> + .class_name = "dash", > >>> + .item_name = av_default_item_name, > >>> + .option = dash_options, > >>> + .version = LIBAVUTIL_VERSION_INT, > >>> +}; > >>> + > >>> +AVInputFormat ff_dash_demuxer = { > >>> + .name = "dash", > >>> + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming > >> over HTTP"), > >>> + .priv_class = &dash_class, > >>> + .priv_data_size = sizeof(DASHContext), > >>> + .read_probe = dash_probe, > >>> + .read_header = dash_read_header, > >>> + .read_packet = dash_read_packet, > >>> + .read_close = dash_close, > >>> + .read_seek = dash_read_seek, > >>> + .flags = AVFMT_NO_BYTE_SEEK, > >>> +}; > >>> -- > >>> 2.10.1 (Apple Git-78) > >>> > >>> > >>> > >>> _______________________________________________ > >>> ffmpeg-devel mailing list > >>> ffmpeg-devel@ffmpeg.org > >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > >> > >> _______________________________________________ > >> ffmpeg-devel mailing list > >> ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> > >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel < > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel> > >> > > _______________________________________________ > > ffmpeg-devel mailing list > > ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> > > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel < > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel> > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >
diff --git a/configure b/configure index 4eb116b..86d16a8 100755 --- a/configure +++ b/configure @@ -273,6 +273,7 @@ External library support: --enable-libxcb-shape enable X11 grabbing shape rendering [autodetect] --enable-libxvid enable Xvid encoding via xvidcore, native MPEG-4/Xvid encoder exists [no] + --enable-libxml2 enable XML parsing using the C library libxml2 [no] --enable-libzimg enable z.lib, needed for zscale filter [no] --enable-libzmq enable message passing via libzmq [no] --enable-libzvbi enable teletext support via libzvbi [no] @@ -1590,6 +1591,7 @@ EXTERNAL_LIBRARY_LIST=" libvpx libwavpack libwebp + libxml2 libzimg libzmq libzvbi @@ -2920,6 +2922,7 @@ avi_muxer_select="riffenc" caf_demuxer_select="iso_media riffdec" caf_muxer_select="iso_media" dash_muxer_select="mp4_muxer" +dash_demuxer_deps="libxml2" dirac_demuxer_select="dirac_parser" dts_demuxer_select="dca_parser" dtshd_demuxer_select="dca_parser" @@ -5920,6 +5923,7 @@ enabled openssl && { use_pkg_config openssl openssl/ssl.h OPENSSL_init check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 || die "ERROR: openssl not found"; } enabled qtkit_indev && { check_header_objcc QTKit/QTKit.h || disable qtkit_indev; } +enabled libxml2 && require_pkg_config libxml-2.0 libxml2/libxml/xmlversion.h xmlCheckVersion -lxml2 # libdc1394 check if enabled libdc1394; then diff --git a/libavformat/Makefile b/libavformat/Makefile index f56ef16..d77ffaa 100644 --- a/libavformat/Makefile +++ b/libavformat/Makefile @@ -134,6 +134,7 @@ OBJS-$(CONFIG_CRC_MUXER) += crcenc.o OBJS-$(CONFIG_DATA_DEMUXER) += rawdec.o OBJS-$(CONFIG_DATA_MUXER) += rawenc.o OBJS-$(CONFIG_DASH_MUXER) += dashenc.o +OBJS-$(CONFIG_DASH_DEMUXER) += dashdec.o OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o diff --git a/libavformat/allformats.c b/libavformat/allformats.c index 09e62c3..d57314b 100644 --- a/libavformat/allformats.c +++ b/libavformat/allformats.c @@ -96,7 +96,7 @@ static void register_all(void) REGISTER_DEMUXER (CINE, cine); REGISTER_DEMUXER (CONCAT, concat); REGISTER_MUXER (CRC, crc); - REGISTER_MUXER (DASH, dash); + REGISTER_MUXDEMUX(DASH, dash); REGISTER_MUXDEMUX(DATA, data); REGISTER_MUXDEMUX(DAUD, daud); REGISTER_DEMUXER (DCSTR, dcstr); diff --git a/libavformat/dashdec.c b/libavformat/dashdec.c new file mode 100644 index 0000000..e0be85e --- /dev/null +++ b/libavformat/dashdec.c @@ -0,0 +1,1841 @@ +/* + * Dynamic Adaptive Streaming over HTTP demux + * Copyright (c) 2017 samsamsam@o2.pl based on HLS demux + * Copyright (c) 2017 Steven Liu + * + * This file is part of FFmpeg. + * + * FFmpeg is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * FFmpeg is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ +#include <libxml/parser.h> +#include "libavutil/intreadwrite.h" +#include "libavutil/opt.h" +#include "libavutil/time.h" +#include "libavutil/parseutils.h" +#include "internal.h" +#include "avio_internal.h" + +#define INITIAL_BUFFER_SIZE 32768 + +struct fragment { + int64_t url_offset; + int64_t size; + char *url; +}; + +/* + * reference to : ISO_IEC_23009-1-DASH-2012 + * Section: 5.3.9.6.2 + * Table: Table 17 — Semantics of SegmentTimeline element + * */ +struct timeline { + /* t: Element or Attribute Name + * specifies the MPD start time, in @timescale units, + * the first Segment in the series starts relative to the beginning of the Period. + * The value of this attribute must be equal to or greater than the sum of the previous S + * element earliest presentation time and the sum of the contiguous Segment durations. + * If the value of the attribute is greater than what is expressed by the previous S element, + * it expresses discontinuities in the timeline. + * If not present then the value shall be assumed to be zero for the first S element + * and for the subsequent S elements, the value shall be assumed to be the sum of + * the previous S element's earliest presentation time and contiguous duration + * (i.e. previous S@t + @d * (@r + 1)). + * */ + int64_t t; + /* r: Element or Attribute Name + * specifies the repeat count of the number of following contiguous Segments with + * the same duration expressed by the value of @d. This value is zero-based + * (e.g. a value of three means four Segments in the contiguous series). + * */ + int32_t r; + /* d: Element or Attribute Name + * specifies the Segment duration, in units of the value of the @timescale. + * */ + int64_t d; +}; + +enum DASHTmplUrlType { + TMP_URL_TYPE_UNSPECIFIED, + TMP_URL_TYPE_NUMBER, + TMP_URL_TYPE_TIME, +}; + +/* + * Each playlist has its own demuxer. If it is currently active, + * it has an opened AVIOContext too, and potentially an AVPacket + * containing the next packet from this stream. + */ +struct representation { + char *url_template; + enum DASHTmplUrlType tmp_url_type; + AVIOContext pb; + AVIOContext *input; + AVFormatContext *parent; + AVFormatContext *ctx; + AVPacket pkt; + int rep_idx; + int rep_count; + int stream_index; + + enum AVMediaType type; + int64_t target_duration; + + int n_fragments; + struct fragment **fragments; /* VOD list of fragment for profile */ + + int n_timelines; + struct timeline **timelines; + + int64_t first_seq_no; + int64_t last_seq_no; + + int64_t fragment_duration; + int64_t fragment_timescale; + + int64_t cur_seq_no; + int64_t cur_seg_offset; + int64_t cur_seg_size; + struct fragment *cur_seg; + + /* Currently active Media Initialization Section */ + struct fragment *init_section; + uint8_t *init_sec_buf; + uint32_t init_sec_buf_size; + uint32_t init_sec_data_len; + uint32_t init_sec_buf_read_offset; + int fix_multiple_stsd_order; + int64_t cur_timestamp; +}; + +typedef struct DASHContext { + const AVClass *class; + char *base_url; + struct representation *cur_video; + struct representation *cur_audio; + uint64_t media_presentation_duration_sec; + uint64_t suggested_presentation_delay_sec; + uint64_t presentation_delay_sec; + uint64_t availability_start_time_sec; + uint64_t publish_time_sec; + uint64_t minimum_update_period_sec; + uint64_t time_shift_buffer_depth_sec; + uint64_t min_buffer_time_sec; + uint64_t period_duration_sec; + uint64_t period_start_sec; + int is_live; + int audio_rep_index; + int video_rep_index; + AVIOInterruptCB *interrupt_callback; + char *user_agent; ///< holds HTTP user agent set as an AVOption to the HTTP protocol context + char *cookies; ///< holds HTTP cookie values set in either the initial response or as an AVOption to the HTTP protocol context + char *headers; ///< holds HTTP headers set as an AVOption to the HTTP protocol context + AVDictionary *avio_opts; +} DASHContext; + +static uint64_t GetCurrentTimeInSec(void) +{ + return av_gettime() / 1000000; +} + +static uint64_t GetUTCDateTimeInSec(AVFormatContext *s, const char *datetime) +{ + struct tm timeinfo; + int year = 0; + int month = 0; + int day = 0; + int hour = 0; + int minute = 0; + int ret = 0; + float second = 0.0; + + /* ISO-8601 date parser */ + if (!datetime) + return 0; + + ret = sscanf(datetime, "%d-%d-%dT%d:%d:%fZ", &year, &month, &day, &hour, &minute, &second); + /* year, month, day, hour, minute, second 6 arguments */ + if (ret != 6) { + av_log(s, AV_LOG_WARNING, "GetUTCDateTimeInSec get a wrong time format\n"); + // return 0; /* parser error */ + } + timeinfo.tm_year = year - 1900; + timeinfo.tm_mon = month - 1; + timeinfo.tm_mday = day; + timeinfo.tm_hour = hour; + timeinfo.tm_min = minute; + timeinfo.tm_sec = (int)second; + + return av_timegm(&timeinfo); +} + +static uint32_t GetDurationInSec(AVFormatContext *s, const char *duration) +{ + /* ISO-8601 duration parser */ + uint32_t days = 0; + uint32_t hours = 0; + uint32_t mins = 0; + uint32_t secs = 0; + uint32_t size = 0; + float value = 0; + uint8_t type = 0; + const char *ptr = duration; + + while (*ptr) { + if (*ptr == 'P' || *ptr == 'T') { + ptr++; + continue; + } + + if (sscanf(ptr, "%f%c%n", &value, &type, &size) != 2) { + av_log(s, AV_LOG_WARNING, "GetDurationInSec get a wrong time format\n"); + return 0; /* parser error */ + } + switch (type) { + case 'D': + days = (uint32_t)value; + break; + case 'H': + hours = (uint32_t)value; + break; + case 'M': + mins = (uint32_t)value; + break; + case 'S': + secs = (uint32_t)value; + break; + default: + // handle invalid type + break; + } + ptr += size; + } + return ((days * 24 + hours) * 60 + mins) * 60 + secs; +} + +static void free_fragment(struct fragment **seg) +{ + if (!(*seg)) { + return; + } + av_freep(&(*seg)->url); + av_freep(seg); +} + +static void free_fragment_list(struct representation *pls) +{ + int i; + + for (i = 0; i < pls->n_fragments; i++) { + free_fragment(&pls->fragments[i]); + } + av_freep(&pls->fragments); + pls->n_fragments = 0; +} + +static void free_timelines_list(struct representation *pls) +{ + int i; + + for (i = 0; i < pls->n_timelines; i++) { + av_freep(&pls->timelines[i]); + } + av_freep(&pls->timelines); + pls->n_timelines = 0; +} + +/* + * Used to reset a statically allocated AVPacket to a clean slate, + * containing no data. + */ +static void reset_packet(AVPacket *pkt) +{ + av_init_packet(pkt); + pkt->data = NULL; +} + +static void free_representation(struct representation *pls) +{ + free_fragment_list(pls); + free_timelines_list(pls); + free_fragment(&pls->cur_seg); + free_fragment(&pls->init_section); + av_freep(&pls->init_sec_buf); + av_packet_unref(&pls->pkt); + reset_packet(&pls->pkt); + av_freep(&pls->pb.buffer); + if (pls->input) + ff_format_io_close(pls->parent, &pls->input); + if (pls->ctx) { + pls->ctx->pb = NULL; + avformat_close_input(&pls->ctx); + } + + av_free(pls->url_template); + av_free(pls); +} + +static void update_options(char **dest, const char *name, void *src) +{ + av_freep(dest); + av_opt_get(src, name, AV_OPT_SEARCH_CHILDREN, (uint8_t**)dest); + if (*dest) + av_freep(dest); +} + +static int open_url(AVFormatContext *s, AVIOContext **pb, const char *url, + AVDictionary *opts, AVDictionary *opts2, int *is_http) +{ + DASHContext *c = s->priv_data; + AVDictionary *tmp = NULL; + const char *proto_name = NULL; + int ret; + + av_dict_copy(&tmp, opts, 0); + av_dict_copy(&tmp, opts2, 0); + + if (av_strstart(url, "crypto", NULL)) { + if (url[6] == '+' || url[6] == ':') + proto_name = avio_find_protocol_name(url + 7); + } + + if (!proto_name) + proto_name = avio_find_protocol_name(url); + + if (!proto_name) + return AVERROR_INVALIDDATA; + + // only http(s) & file are allowed + if (!av_strstart(proto_name, "http", NULL) && !av_strstart(proto_name, "file", NULL)) + return AVERROR_INVALIDDATA; + if (!strncmp(proto_name, url, strlen(proto_name)) && url[strlen(proto_name)] == ':') + ; + else if (av_strstart(url, "crypto", NULL) && !strncmp(proto_name, url + 7, strlen(proto_name)) && url[7 + strlen(proto_name)] == ':') + ; + else if (strcmp(proto_name, "file") || !strncmp(url, "file,", 5)) + return AVERROR_INVALIDDATA; + + ret = s->io_open(s, pb, url, AVIO_FLAG_READ, &tmp); + if (ret >= 0) { + // update cookies on http response with setcookies. + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; + update_options(&c->cookies, "cookies", u); + av_dict_set(&opts, "cookies", c->cookies, 0); + } + + av_dict_free(&tmp); + + if (is_http) + *is_http = av_strstart(proto_name, "http", NULL); + + return ret; + +} + +static char *strreplace(const char *str, const char *from, const char *to) +{ + /* Adjust each of the below values to suit your needs. */ + /* Increment positions cache size initially by this number. */ + size_t cache_sz_inc = 16; + /* Thereafter, each time capacity needs to be increased, + * multiply the increment by this factor. */ + const size_t cache_sz_inc_factor = 3; + /* But never increment capacity by more than this number. */ + const size_t cache_sz_inc_max = 1048576; + + char *pret, *ret = NULL; + const char *pstr2, *pstr = str; + size_t i, count = 0; + uintptr_t *pos_cache_tmp, *pos_cache = NULL; + size_t cache_sz = 0; + size_t cpylen, orglen, retlen, tolen, fromlen = strlen(from); + + /* Find all matches and cache their positions. */ + while ((pstr2 = av_stristr(pstr, from))) { + count++; + /* Increase the cache size when necessary. */ + if (cache_sz < count) { + cache_sz += cache_sz_inc; + pos_cache_tmp = av_realloc(pos_cache, sizeof(*pos_cache) * cache_sz); + if (!pos_cache_tmp) { + goto end_strreplace; + } else pos_cache = pos_cache_tmp; + cache_sz_inc *= cache_sz_inc_factor; + if (cache_sz_inc > cache_sz_inc_max) { + cache_sz_inc = cache_sz_inc_max; + } + } + + pos_cache[count-1] = pstr2 - str; + pstr = pstr2 + fromlen; + } + orglen = pstr - str + strlen(pstr); + /* Allocate memory for the post-replacement string. */ + if (count > 0) { + tolen = strlen(to); + retlen = orglen + (tolen - fromlen) * count; + } else { + retlen = orglen; + } + ret = av_malloc(retlen + 1); + if (!ret) { + goto end_strreplace; + } + + if (!count) { + /* If no matches, then just duplicate the string. */ + av_strlcpy(ret, str, retlen + 1); + } else { + /* Otherwise, duplicate the string whilst performing + * the replacements using the position cache. */ + pret = ret; + memcpy(pret, str, pos_cache[0]); + pret += pos_cache[0]; + for (i = 0; i < count; i++) { + memcpy(pret, to, tolen); + pret += tolen; + pstr = str + pos_cache[i] + fromlen; + cpylen = (i == count-1 ? orglen : pos_cache[i+1]) - pos_cache[i] - fromlen; + memcpy(pret, pstr, cpylen); + pret += cpylen; + } + ret[retlen] = '\0'; + } + +end_strreplace: + /* Free the cache and return the post-replacement string, + * which will be NULL in the event of an error. */ + av_free(pos_cache); + return ret; +} + +static char *replace_template_str(const char *url, const char *marker) +{ + char *prefix = NULL; + char *start = 0; + char *end = NULL; + char *tmp_url = NULL; + char *new_url = NULL; + int marker_len; + + prefix = av_strdup(marker); + marker_len = strlen(prefix) - 1; + prefix[marker_len] = '\0'; + + start = av_stristr(url, prefix); + if (!start) + goto finish; + end = strchr(start + 1, '$'); + if (!end) + goto finish; + + if (start[marker_len] != '%') + goto finish; + + if (end[-1] != 'd') + goto finish; + + tmp_url = av_mallocz(MAX_URL_SIZE); + if (!tmp_url) { + return NULL; + } + + av_strlcpy(tmp_url, url, start - url+ 1); + av_strlcat(tmp_url, start + marker_len, strlen(tmp_url) + end - start - marker_len); + av_strlcat(tmp_url, PRId64, MAX_URL_SIZE); + av_strlcat(tmp_url, end + 1, MAX_URL_SIZE); + +finish: + av_free(prefix); + new_url = strreplace(tmp_url ? tmp_url : url, marker, "%"PRId64); + av_free(tmp_url); + return new_url; +} + +static char *get_content_url(xmlNodePtr *baseurl_nodes, int n_baseurl_nodes, xmlChar *rep_id_val, xmlChar *rep_bandwidth_val, xmlChar *val) +{ + int i; + xmlChar *text; + char *url = NULL; + char *tmp_str = av_mallocz(MAX_URL_SIZE); + char *tmp_str_2 = NULL; + + if (!tmp_str) { + return NULL; + } + for (i = 0; i < n_baseurl_nodes; ++i) { + if (baseurl_nodes[i] && baseurl_nodes[i]->children && baseurl_nodes[i]->children->type == XML_TEXT_NODE) { + text = xmlNodeGetContent(baseurl_nodes[i]->children); + if (text) { + tmp_str_2 = av_mallocz(MAX_URL_SIZE); + if (!tmp_str_2) { + av_free(tmp_str); + return NULL; + } + ff_make_absolute_url(tmp_str_2, MAX_URL_SIZE, tmp_str, text); + av_free(tmp_str); + tmp_str = tmp_str_2; + xmlFree(text); + } + } + } + if (val) + av_strlcat(tmp_str, (const char*)val, MAX_URL_SIZE); + if (rep_id_val) { + url = strreplace(tmp_str, "$RepresentationID$", (const char*)rep_id_val); + av_free(tmp_str); + tmp_str = url; + } + if (rep_bandwidth_val && tmp_str) + url = strreplace(tmp_str, "$Bandwidth$", (const char*)rep_bandwidth_val); + if (tmp_str != url) + av_free(tmp_str); + return url; +} + +static xmlChar *get_val_from_nodes_tab(xmlNodePtr *nodes, const int n_nodes, const xmlChar *attrname) +{ + int i; + xmlChar *val; + + for (i = 0; i < n_nodes; ++i) { + if (nodes[i]) { + val = xmlGetProp(nodes[i], attrname); + if (val) + return val; + } + } + + return NULL; +} + +static xmlNodePtr findChildNodeByName(xmlNodePtr rootnode, const xmlChar *nodename) +{ + xmlNodePtr node = rootnode; + if (!node) { + return NULL; + } + + node = xmlFirstElementChild(node); + while (node) { + if (!xmlStrcmp(node->name, nodename)) { + return node; + } + node = xmlNextElementSibling(node); + } + return NULL; +} + +static enum AVMediaType get_content_type(xmlNodePtr node) +{ + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; + int i = 0; + const char *attr; + + if (node) { + while (type == AVMEDIA_TYPE_UNKNOWN && i < 2) { + attr = (i) ? "mimeType" : "contentType"; + xmlChar *val = xmlGetProp(node, attr); + if (val) { + if (av_stristr((const char *)val, "video")) { + type = AVMEDIA_TYPE_VIDEO; + } else if (av_stristr((const char *)val, "audio")) { + type = AVMEDIA_TYPE_AUDIO; + } + xmlFree(val); + } + i++; + } + } + return type; +} + +static int parse_manifest_segmenturlnode(AVFormatContext *s, struct representation *rep, + xmlNodePtr fragmenturl_node, + xmlNodePtr *baseurl_nodes, + xmlChar *rep_id_val, + xmlChar *rep_bandwidth_val) +{ + xmlChar *initialization_val = NULL; + xmlChar *media_val = NULL; + + if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"Initialization")) { + initialization_val = xmlGetProp(fragmenturl_node, "sourceURL"); + if (initialization_val) { + rep->init_section = av_mallocz(sizeof(struct fragment)); + if (!rep->init_section) { + xmlFree(initialization_val); + return AVERROR(ENOMEM); + } + rep->init_section->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, initialization_val); + rep->init_section->size = -1; + xmlFree(initialization_val); + } + } else if (!xmlStrcmp(fragmenturl_node->name, (const xmlChar *)"SegmentURL")) { + media_val = xmlGetProp(fragmenturl_node, "media"); + if (media_val) { + struct fragment *seg = av_mallocz(sizeof(struct fragment)); + if (!seg) { + xmlFree(media_val); + return AVERROR(ENOMEM); + } + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val); + seg->size = -1; + dynarray_add(&rep->fragments, &rep->n_fragments, seg); + xmlFree(media_val); + } + } + + return 0; +} + +static int parse_manifest_segmenttimeline(AVFormatContext *s, struct representation *rep, + xmlNodePtr fragment_timeline_node) +{ + xmlAttrPtr attr = NULL; + xmlChar *val = NULL; + + if (!xmlStrcmp(fragment_timeline_node->name, (const xmlChar *)"S")) { + struct timeline *tml = av_mallocz(sizeof(struct timeline)); + if (!tml) { + return AVERROR(ENOMEM); + } + attr = fragment_timeline_node->properties; + while (attr) { + val = xmlGetProp(fragment_timeline_node, attr->name); + + if (!val) { + av_log(s, AV_LOG_WARNING, "parse_manifest_segmenttimeline attr->name = %s val is NULL\n", attr->name); + continue; + } + + if (!xmlStrcmp(attr->name, (const xmlChar *)"t")) { + tml->t = (int64_t)atoll((const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"r")) { + tml->r =(int32_t) atoi((const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"d")) { + tml->d = (int64_t)atoll((const char *)val); + rep->fragment_duration = (int64_t) atoll((const char *)val); + } + attr = attr->next; + xmlFree(val); + } + dynarray_add(&rep->timelines, &rep->n_timelines, tml); + } + + return 0; +} + +static int parse_manifest_representation(AVFormatContext *s, const char *url, + xmlNodePtr node, + xmlNodePtr adaptionset_node, + xmlNodePtr mpd_baseurl_node, + xmlNodePtr period_baseurl_node, + xmlNodePtr fragment_template_node, + xmlNodePtr content_component_node, + xmlNodePtr adaptionset_baseurl_node) +{ + int32_t ret = 0; + int32_t audio_rep_idx = 0; + int32_t video_rep_idx = 0; + char *temp_string = NULL; + DASHContext *c = s->priv_data; + struct representation *rep = NULL; + struct fragment *seg = NULL; + xmlNodePtr representation_segmenttemplate_node = NULL; + xmlNodePtr representation_baseurl_node = NULL; + xmlNodePtr representation_segmentlist_node = NULL; + xmlNodePtr fragment_timeline_node = NULL; + xmlNodePtr fragment_templates_tab[2]; + xmlChar *duration_val = NULL; + xmlChar *startnumber_val = NULL; + xmlChar *timescale_val = NULL; + xmlChar *initialization_val = NULL; + xmlChar *media_val = NULL; + xmlNodePtr baseurl_nodes[4]; + xmlNodePtr representation_node = node; + xmlChar *rep_id_val = xmlGetProp(representation_node, "id"); + xmlChar *rep_bandwidth_val = xmlGetProp(representation_node, "bandwidth"); + enum AVMediaType type = AVMEDIA_TYPE_UNKNOWN; + + // try get information from representation + if (type == AVMEDIA_TYPE_UNKNOWN) + type = get_content_type(representation_node); + // try get information from contentComponen + if (type == AVMEDIA_TYPE_UNKNOWN) + type = get_content_type(content_component_node); + // try get information from adaption set + if (type == AVMEDIA_TYPE_UNKNOWN) + type = get_content_type(adaptionset_node); + if (type == AVMEDIA_TYPE_UNKNOWN) { + av_log(s, AV_LOG_VERBOSE, "Parsing '%s' - skipp not supported representation type\n", url); + } else if ((type == AVMEDIA_TYPE_VIDEO && ((c->video_rep_index < 0 && !c->cur_video) || + video_rep_idx == (int32_t)c->video_rep_index )) || + (type == AVMEDIA_TYPE_AUDIO && ((c->audio_rep_index < 0 && !c->cur_audio) || + audio_rep_idx == (int32_t)c->audio_rep_index ))) { + // convert selected representation to our internal struct + rep = av_mallocz(sizeof(struct representation)); + if (!rep) { + ret = AVERROR(ENOMEM); + goto end; + } + representation_segmenttemplate_node = findChildNodeByName(representation_node, "SegmentTemplate"); + representation_baseurl_node = findChildNodeByName(representation_node, "BaseURL"); + representation_segmentlist_node = findChildNodeByName(representation_node, "SegmentList"); + reset_packet(&rep->pkt); + + baseurl_nodes[0] = mpd_baseurl_node; + baseurl_nodes[1] = period_baseurl_node; + baseurl_nodes[2] = adaptionset_baseurl_node; + baseurl_nodes[3] = representation_baseurl_node; + + if (representation_segmenttemplate_node || fragment_template_node) { + fragment_timeline_node = NULL; + fragment_templates_tab[0] = representation_segmenttemplate_node; + fragment_templates_tab[1] = fragment_template_node; + + duration_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "duration"); + startnumber_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "startNumber"); + timescale_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "timescale"); + initialization_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "initialization"); + media_val = get_val_from_nodes_tab(fragment_templates_tab, 2, "media"); + + if (initialization_val) { + rep->init_section = av_mallocz(sizeof(struct fragment)); + if (!rep->init_section) { + av_free(rep); + ret = AVERROR(ENOMEM); + goto end; + } + rep->init_section->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, initialization_val); + rep->init_section->size = -1; + xmlFree(initialization_val); + } + + if (media_val) { + temp_string = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, media_val); + if (temp_string) { + if (av_stristr(temp_string, "$Number")) { + rep->url_template = replace_template_str(temp_string, "$Number$"); + /* A URL template is provided from which clients build a chunk list + * where the chunk URLs include chunk numbers (like index numbers). + */ + rep->tmp_url_type = TMP_URL_TYPE_NUMBER; /* Number-Based. */ + } else if (av_stristr(temp_string, "$Time")) { + rep->url_template = replace_template_str(temp_string, "$Time$"); + /* A URL template is provided from which clients build a chunk list + * where the chunk URLs include chunk start times. + */ + rep->tmp_url_type = TMP_URL_TYPE_TIME; /* Time-Based. */ + } else { + rep->url_template = temp_string; + temp_string = NULL; + } + av_free(temp_string); + } + xmlFree(media_val); + } + if (duration_val) { + rep->fragment_duration = (int64_t) atoll((const char *)duration_val); + xmlFree(duration_val); + } + if (timescale_val) { + rep->fragment_timescale = (int64_t) atoll((const char *)timescale_val); + xmlFree(timescale_val); + } + if (startnumber_val) { + rep->first_seq_no = (int64_t) atoll((const char *)startnumber_val); + xmlFree(startnumber_val); + } + + fragment_timeline_node = findChildNodeByName(representation_segmenttemplate_node, "SegmentTimeline"); + + if (!fragment_timeline_node) + fragment_timeline_node = findChildNodeByName(fragment_template_node, "SegmentTimeline"); + if (fragment_timeline_node) { + fragment_timeline_node = xmlFirstElementChild(fragment_timeline_node); + while (fragment_timeline_node) { + ret = parse_manifest_segmenttimeline(s, rep, fragment_timeline_node); + if (ret < 0) { + return ret; + } + fragment_timeline_node = xmlNextElementSibling(fragment_timeline_node); + } + } + } else if (representation_baseurl_node && !representation_segmentlist_node) { + seg = av_mallocz(sizeof(struct fragment)); + if (!seg) { + ret = AVERROR(ENOMEM); + goto end; + } + seg->url = get_content_url(baseurl_nodes, 4, rep_id_val, rep_bandwidth_val, NULL); + seg->size = -1; + dynarray_add(&rep->fragments, &rep->n_fragments, seg); + } else if (!representation_baseurl_node && representation_segmentlist_node) { + // TODO: https://www.brendanlong.com/the-structure-of-an-mpeg-dash-mpd.html + // http://www-itec.uni-klu.ac.at/dash/ddash/mpdGenerator.php?fragmentlength=15&type=full + xmlNodePtr fragmenturl_node = NULL; + duration_val = xmlGetProp(representation_segmentlist_node, "duration"); + timescale_val = xmlGetProp(representation_segmentlist_node, "timescale"); + if (duration_val) { + rep->fragment_duration = (int64_t) atoll((const char *)duration_val); + xmlFree(duration_val); + } + if (timescale_val) { + rep->fragment_timescale = (int64_t) atoll((const char *)timescale_val); + xmlFree(timescale_val); + } + fragmenturl_node = xmlFirstElementChild(representation_segmentlist_node); + while (fragmenturl_node) { + ret = parse_manifest_segmenturlnode(s, rep, fragmenturl_node, baseurl_nodes, rep_id_val, rep_bandwidth_val); + if (ret < 0) { + return ret; + } + fragmenturl_node = xmlNextElementSibling(fragmenturl_node); + } + } else { + free_representation(rep); + rep = NULL; + av_log(s, AV_LOG_ERROR, "Unknown format of Representation node id[%s] \n", (const char *)rep_id_val); + } + + if (rep) { + if (rep->fragment_duration > 0 && !rep->fragment_timescale) + rep->fragment_timescale = 1; + if (type == AVMEDIA_TYPE_VIDEO) { + rep->rep_idx = video_rep_idx; + c->cur_video = rep; + } else { + rep->rep_idx = audio_rep_idx; + c->cur_audio = rep; + } + } + } + + video_rep_idx += type == AVMEDIA_TYPE_VIDEO; + audio_rep_idx += type == AVMEDIA_TYPE_AUDIO; + +end: + if (rep_id_val) + xmlFree(rep_id_val); + if (rep_bandwidth_val) + xmlFree(rep_bandwidth_val); + + return ret; +} + +static int parse_manifest_adaptationset(AVFormatContext *s, const char *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node) +{ + int ret = 0; + xmlNodePtr fragment_template_node = NULL; + xmlNodePtr content_component_node = NULL; + xmlNodePtr adaptionset_baseurl_node = NULL; + xmlNodePtr node = NULL; + + node = xmlFirstElementChild(adaptionset_node); + while (node) { + if (!xmlStrcmp(node->name, (const xmlChar *)"SegmentTemplate")) { + fragment_template_node = node; + } else if (!xmlStrcmp(node->name, (const xmlChar *)"ContentComponent")) { + content_component_node = node; + } else if (!xmlStrcmp(node->name, (const xmlChar *)"BaseURL")) { + adaptionset_baseurl_node = node; + } else if (!xmlStrcmp(node->name, (const xmlChar *)"Representation")) { + ret = parse_manifest_representation(s, url, node, + adaptionset_node, + mpd_baseurl_node, + period_baseurl_node, + fragment_template_node, + content_component_node, + adaptionset_baseurl_node); + if (ret < 0) { + return ret; + } + } + node = xmlNextElementSibling(node); + } + return 0; +} + + +static int parse_manifest(AVFormatContext *s, const char *url, AVIOContext *in) +{ + DASHContext *c = s->priv_data; + int ret = 0; + int close_in = 0; + uint8_t *new_url = NULL; + int64_t filesize = 0; + char *buffer = NULL; + AVDictionary *opts = NULL; + xmlDoc *doc = NULL; + xmlNodePtr root_element = NULL; + xmlNodePtr node = NULL; + xmlNodePtr period_node = NULL; + xmlNodePtr mpd_baseurl_node = NULL; + xmlNodePtr period_baseurl_node = NULL; + xmlNodePtr adaptionset_node = NULL; + xmlAttrPtr attr = NULL; + xmlChar *val = NULL; + uint32_t perdiod_duration_sec = 0; + uint32_t perdiod_start_sec = 0; + int32_t audio_rep_idx = 0; + int32_t video_rep_idx = 0; + + if (!in) { + close_in = 1; + /* This is XML manifest there is no need to set range header */ + av_dict_set(&opts, "seekable", "0", 0); + // broker prior HTTP options that should be consistent across requests + av_dict_set(&opts, "user-agent", c->user_agent, 0); + av_dict_set(&opts, "cookies", c->cookies, 0); + av_dict_set(&opts, "headers", c->headers, 0); + + ret = avio_open2(&in, url, AVIO_FLAG_READ, c->interrupt_callback, &opts); + av_dict_free(&opts); + if (ret < 0) + return ret; + } + + if (av_opt_get(in, "location", AV_OPT_SEARCH_CHILDREN, &new_url) >= 0) { + c->base_url = av_strdup(new_url); + } else { + c->base_url = av_strdup(url); + } + + filesize = avio_size(in); + if (filesize <= 0){ + filesize = 8 * 1024; + } + + buffer = av_mallocz(filesize); + if (!buffer) { + return AVERROR(ENOMEM); + } + + filesize = avio_read(in, buffer, filesize); + if (filesize > 0) { + LIBXML_TEST_VERSION + + doc = xmlReadMemory(buffer, filesize, c->base_url, NULL, 0); + root_element = xmlDocGetRootElement(doc); + node = root_element; + + if (!node) { + ret = AVERROR_INVALIDDATA; + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing root node\n", url); + goto cleanup; + } + + if (node->type != XML_ELEMENT_NODE || + xmlStrcmp(node->name, (const xmlChar *)"MPD")) { + ret = AVERROR_INVALIDDATA; + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - wrong root node name[%s] type[%d]\n", url, node->name, (int)node->type); + goto cleanup; + } + + val = xmlGetProp(node, "type"); + if (!val) { + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing type attrib\n", url); + ret = AVERROR_INVALIDDATA; + goto cleanup; + } + if (!xmlStrcmp(val, (const xmlChar *)"dynamic")) + c->is_live = 1; + xmlFree(val); + + attr = node->properties; + while (attr) { + val = xmlGetProp(node, attr->name); + + if (!xmlStrcmp(attr->name, (const xmlChar *)"availabilityStartTime")) { + c->availability_start_time_sec = GetUTCDateTimeInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"publishTime")) { + c->publish_time_sec = GetUTCDateTimeInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minimumUpdatePeriod")) { + c->minimum_update_period_sec = GetDurationInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"timeShiftBufferDepth")) { + c->time_shift_buffer_depth_sec = GetDurationInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"minBufferTime")) { + c->min_buffer_time_sec = GetDurationInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"suggestedPresentationDelay")) { + c->suggested_presentation_delay_sec = GetDurationInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"mediaPresentationDuration")) { + c->media_presentation_duration_sec = GetDurationInSec(s, (const char *)val); + } + attr = attr->next; + xmlFree(val); + } + + mpd_baseurl_node = findChildNodeByName(node, "BaseURL"); + + // at now we can handle only one period, with the longest duration + node = xmlFirstElementChild(node); + while (node) { + if (!xmlStrcmp(node->name, (const xmlChar *)"Period")) { + perdiod_duration_sec = 0; + perdiod_start_sec = 0; + attr = node->properties; + while (attr) { + val = xmlGetProp(node, attr->name); + if (!xmlStrcmp(attr->name, (const xmlChar *)"duration")) { + perdiod_duration_sec = GetDurationInSec(s, (const char *)val); + } else if (!xmlStrcmp(attr->name, (const xmlChar *)"start")) { + perdiod_start_sec = GetDurationInSec(s, (const char *)val); + } + attr = attr->next; + xmlFree(val); + } + if ((perdiod_duration_sec) >= (c->period_duration_sec)) { + period_node = node; + c->period_duration_sec = perdiod_duration_sec; + c->period_start_sec = perdiod_start_sec; + if (c->period_start_sec > 0) + c->media_presentation_duration_sec = c->period_duration_sec; + } + } + node = xmlNextElementSibling(node); + } + if (!period_node) { + av_log(s, AV_LOG_ERROR, "Unable to parse '%s' - missing Period node\n", url); + ret = AVERROR_INVALIDDATA; + goto cleanup; + } + // explore AdaptationSet + adaptionset_node = xmlFirstElementChild(period_node); + while (adaptionset_node) { + if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"BaseURL")) { + period_baseurl_node = adaptionset_node; + } else if (!xmlStrcmp(adaptionset_node->name, (const xmlChar *)"AdaptationSet")) { + parse_manifest_adaptationset(s, url, adaptionset_node, mpd_baseurl_node, period_baseurl_node); + } + adaptionset_node = xmlNextElementSibling(adaptionset_node); + } + if (c->cur_video) { + c->cur_video->rep_count = video_rep_idx; + c->cur_video->fix_multiple_stsd_order = 1; + av_log(s, AV_LOG_VERBOSE, "rep_idx[%d]\n", (int)c->cur_video->rep_idx); + av_log(s, AV_LOG_VERBOSE, "rep_count[%d]\n", (int)video_rep_idx); + } + if (c->cur_audio) { + c->cur_audio->rep_count = audio_rep_idx; + } + +cleanup: + /*free the document */ + xmlFreeDoc(doc); + xmlCleanupParser(); + } else { + av_log(s, AV_LOG_ERROR, "Unable to read to offset '%s'\n", url); + ret = AVERROR_INVALIDDATA; + } + + av_free(new_url); + av_free(buffer); + if (close_in) { + avio_close(in); + } + return ret; +} + +static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls) +{ + DASHContext *c = pls->parent->priv_data; + int64_t num = 0; + + if (c->is_live) { + if (!pls->fragment_duration) { + av_log(s, AV_LOG_ERROR, "Get not get fragment duration value in live mode\n"); + return pls->first_seq_no; + } + num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availability_start_time_sec) - c->presentation_delay_sec) * pls->fragment_timescale) / pls->fragment_duration; + } else { + num = pls->first_seq_no; + } + return num; +} + +static int64_t calc_min_seg_no(AVFormatContext *s, struct representation *pls) +{ + DASHContext *c = pls->parent->priv_data; + int64_t num = 0; + + if (c->is_live) { + if (!pls->fragment_duration) { + av_log(s, AV_LOG_ERROR, "Get not get fragment duration value in live mode\n"); + return pls->first_seq_no; + } + num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availability_start_time_sec) - c->time_shift_buffer_depth_sec) * pls->fragment_timescale) / pls->fragment_duration; + } else { + num = pls->first_seq_no; + } + return num; +} + +static int64_t calc_max_seg_no(AVFormatContext *s, struct representation *pls) +{ + DASHContext *c = pls->parent->priv_data; + int64_t num = 0; + int64_t i = 0; + + if (c->is_live) { + if (!pls->fragment_duration) { + av_log(s, AV_LOG_ERROR, "Get not get fragment duration value in live mode\n"); + return pls->first_seq_no; + } + num = pls->first_seq_no + (((GetCurrentTimeInSec() - c->availability_start_time_sec)) * pls->fragment_timescale) / pls->fragment_duration; + } else { + if (pls->n_fragments) { + num = pls->first_seq_no + pls->n_fragments - 1; + } else if (pls->n_timelines) { + num = pls->first_seq_no + pls->n_timelines - 1; + for (i = 0; i < pls->n_timelines; ++i) { + num += pls->timelines[i]->r; + } + } else { + num = pls->first_seq_no + (c->media_presentation_duration_sec * pls->fragment_timescale) / pls->fragment_duration; + } + } + + return num; +} + +static int64_t get_fragment_start_time(struct representation *pls, int64_t cur_seq_no) +{ + int64_t i = 0; + int64_t j = 0; + int64_t num = 0; + int64_t startTime = 0; + + if (pls->n_timelines) { + for (i = 0; i < pls->n_timelines; ++i) { + if (pls->timelines[i]->t > 0) { + startTime = pls->timelines[i]->t; + } + if (num == cur_seq_no) + goto finish; + startTime += pls->timelines[i]->d; + for (j = 0; j < pls->timelines[i]->r; ++j) { + num++; + if (num == cur_seq_no) + goto finish; + startTime += pls->timelines[i]->d; + } + num++; + } + } + +finish: + return startTime; +} + +static struct fragment *get_current_fragment(struct representation *pls) +{ + int64_t min_seq_no = 0; + int64_t max_seq_no = 0; + char *tmp_str = NULL; + struct fragment *seg = NULL; + struct fragment *seg_ptr = NULL; + DASHContext *c = pls->parent->priv_data; + + if (pls->n_fragments > 0) { + if (pls->cur_seq_no < pls->n_fragments) { + seg_ptr = pls->fragments[pls->cur_seq_no]; + seg = av_mallocz(sizeof(struct fragment)); + if (!seg) { + return NULL; + } + seg->url = av_strdup(seg_ptr->url); + if (!seg->url) { + av_free(seg); + return NULL; + } + seg->size = seg_ptr->size; + seg->url_offset = seg_ptr->url_offset; + return seg; + } + } + if (c->is_live) { + while (1) { + min_seq_no = calc_min_seg_no(pls->parent, pls); + max_seq_no = calc_max_seg_no(pls->parent, pls); + + if (pls->cur_seq_no <= min_seq_no) { + av_log(pls->parent, AV_LOG_VERBOSE, "old fragment: cur[%"PRId64"] min[%"PRId64"] max[%"PRId64"], playlist %d\n", + (int64_t)pls->cur_seq_no, min_seq_no, max_seq_no, (int)pls->rep_idx); + pls->cur_seq_no = calc_cur_seg_no(pls->parent, pls); + } else if (pls->cur_seq_no > max_seq_no) { + av_log(pls->parent, AV_LOG_VERBOSE, "new fragment: min[%"PRId64"] max[%"PRId64"], playlist %d\n", + min_seq_no, max_seq_no, (int)pls->rep_idx); + av_usleep(1000); + continue; + } + break; + } + seg = av_mallocz(sizeof(struct fragment)); + if (!seg) { + return NULL; + } + } else if (pls->cur_seq_no <= pls->last_seq_no) { + seg = av_mallocz(sizeof(struct fragment)); + if (!seg) { + return NULL; + } + } + if (seg) { + if (pls->tmp_url_type != TMP_URL_TYPE_UNSPECIFIED) { + int64_t tmp_val = pls->tmp_url_type == TMP_URL_TYPE_NUMBER ? pls->cur_seq_no : get_fragment_start_time(pls, pls->cur_seq_no); + tmp_str = av_asprintf(pls->url_template, (int64_t)tmp_val); + seg->url = av_strdup(tmp_str); + if (!seg->url) { + av_free(tmp_str); + return NULL; + } + } else { + av_log(pls->parent, AV_LOG_ERROR, "Unable to unable to resolve template url '%s'\n", pls->url_template); + seg->url = av_strdup(pls->url_template); + if (!seg->url) { + return NULL; + } + } + seg->size = -1; + } + + av_free(tmp_str); + return seg; +} + +enum ReadFromURLMode { + READ_NORMAL, + READ_COMPLETE, +}; + +static int read_from_url(struct representation *pls, struct fragment *seg, + uint8_t *buf, int buf_size, + enum ReadFromURLMode mode) +{ + int ret; + + /* limit read if the fragment was only a part of a file */ + if (seg->size >= 0) + buf_size = FFMIN(buf_size, pls->cur_seg_size - pls->cur_seg_offset); + + if (mode == READ_COMPLETE) { + ret = avio_read(pls->input, buf, buf_size); + if (ret < buf_size) { + av_log(pls->parent, AV_LOG_WARNING, "Could not read complete fragment.\n"); + } + } else { + ret = avio_read(pls->input, buf, buf_size); + } + if (ret > 0) + pls->cur_seg_offset += ret; + + return ret; +} + +static int open_input(DASHContext *c, struct representation *pls, struct fragment *seg) +{ + AVDictionary *opts = NULL; + char url[MAX_URL_SIZE]; + int ret; + + // broker prior HTTP options that should be consistent across requests + av_dict_set(&opts, "user-agent", c->user_agent, 0); + av_dict_set(&opts, "cookies", c->cookies, 0); + av_dict_set(&opts, "headers", c->headers, 0); + if (c->is_live) { + av_dict_set(&opts, "seekable", "0", 0); + } + + if (seg->size >= 0) { + /* try to restrict the HTTP request to the part we want + * (if this is in fact a HTTP request) */ + av_dict_set_int(&opts, "offset", seg->url_offset, 0); + av_dict_set_int(&opts, "end_offset", seg->url_offset + seg->size, 0); + } + + ff_make_absolute_url(url, MAX_URL_SIZE, c->base_url, seg->url); + av_log(pls->parent, AV_LOG_VERBOSE, "DASH request for url '%s', offset %"PRId64", playlist %d\n", + url, seg->url_offset, pls->rep_idx); + ret = open_url(pls->parent, &pls->input, url, c->avio_opts, opts, NULL); + if (ret < 0) { + goto cleanup; + } + + /* Seek to the requested position. If this was a HTTP request, the offset + * should already be where want it to, but this allows e.g. local testing + * without a HTTP server. */ + if (!ret && seg->url_offset) { + int64_t seekret = avio_seek(pls->input, seg->url_offset, SEEK_SET); + if (seekret < 0) { + av_log(pls->parent, AV_LOG_ERROR, "Unable to seek to offset %"PRId64" of DASH fragment '%s'\n", seg->url_offset, seg->url); + ret = (int) seekret; + ff_format_io_close(pls->parent, &pls->input); + } + } + +cleanup: + av_dict_free(&opts); + pls->cur_seg_offset = 0; + pls->cur_seg_size = seg->size; + return ret; +} + +static int update_init_section(struct representation *pls) +{ + static const int max_init_section_size = 1024*1024; + DASHContext *c = pls->parent->priv_data; + int64_t sec_size = 0; + int64_t urlsize = 0; + int ret = 0; + + /* read init section only once per representation */ + if (!pls->init_section || pls->init_sec_buf) { + return 0; + } + + ret = open_input(c, pls, pls->init_section); + if (ret < 0) { + av_log(pls->parent, AV_LOG_WARNING, "Failed to open an initialization section in playlist %d\n", pls->rep_idx); + return ret; + } + + if (pls->init_section->size >= 0) { + sec_size = pls->init_section->size; + } else if ((urlsize = avio_size(pls->input)) >= 0) { + sec_size = urlsize; + } else { + sec_size = max_init_section_size; + } + av_log(pls->parent, AV_LOG_DEBUG, "Downloading an initialization section of size %"PRId64"\n", sec_size); + sec_size = FFMIN(sec_size, max_init_section_size); + av_fast_malloc(&pls->init_sec_buf, &pls->init_sec_buf_size, sec_size); + ret = read_from_url(pls, pls->init_section, pls->init_sec_buf, pls->init_sec_buf_size, READ_COMPLETE); + ff_format_io_close(pls->parent, &pls->input); + if (ret < 0) + return ret; + + if (pls->fix_multiple_stsd_order && pls->rep_idx > 0) { + uint8_t **stsd_entries = NULL; + int *stsd_entries_size = NULL; + int i = 4; + + while (i <= (ret - 4)) { + // find start stsd atom + if (!memcmp(pls->init_sec_buf + i, "stsd", 4)) { + /* 1B version + * 3B flags + * 4B num of entries */ + int stsd_first_offset = i + 8; + int stsd_offset = 0; + int j = 0; + uint32_t stsd_count = AV_RB32(pls->init_sec_buf + stsd_first_offset); + stsd_first_offset += 4; + if (stsd_count != pls->rep_count) { + i++; + continue; + } + // find all stsd entries + stsd_entries = av_mallocz_array(stsd_count, sizeof(*stsd_entries)); + stsd_entries_size = av_mallocz_array(stsd_count, sizeof(*stsd_entries_size)); + for (j = 0; j < stsd_count; ++j) { + /* 4B - size + * 4B - format */ + stsd_entries_size[j] = AV_RB32(pls->init_sec_buf + stsd_first_offset + stsd_offset); + stsd_entries[j] = av_malloc(stsd_entries_size[j]); + memcpy(stsd_entries[j], pls->init_sec_buf + stsd_first_offset + stsd_offset, stsd_entries_size[j]); + stsd_offset += stsd_entries_size[j]; + } + // reorder stsd entries + // as first put stsd entry for current representation + j = pls->rep_idx; + stsd_offset = stsd_first_offset; + memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]); + stsd_offset += stsd_entries_size[j]; + for (j = 0; j < stsd_count; ++j) { + if (j != pls->rep_idx) { + memcpy(pls->init_sec_buf + stsd_offset, stsd_entries[j], stsd_entries_size[j]); + stsd_offset += stsd_entries_size[j]; + } + av_free(stsd_entries[j]); + } + av_freep(&stsd_entries); + av_freep(&stsd_entries_size); + break; + } + i++; + } + } + + av_log(pls->parent, AV_LOG_TRACE, "pls[%p] init section size[%d]\n", pls, (int)ret); + pls->init_sec_data_len = ret; + pls->init_sec_buf_read_offset = 0; + + return 0; +} + +static int64_t seek_data(void *opaque, int64_t offset, int whence) +{ + struct representation *v = opaque; + if (v->n_fragments && !v->init_sec_data_len) { + return avio_seek(v->input, offset, whence); + } + + return AVERROR(ENOSYS); +} + +static int read_data(void *opaque, uint8_t *buf, int buf_size) +{ + int ret = 0; + struct representation *v = opaque; + DASHContext *c = v->parent->priv_data; + +restart: + if (!v->input) { + free_fragment(&v->cur_seg); + v->cur_seg = get_current_fragment(v); + if (!v->cur_seg) { + ret = AVERROR_EOF; + goto end; + } + + /* load/update Media Initialization Section, if any */ + ret = update_init_section(v); + if (ret) + goto end; + + ret = open_input(c, v, v->cur_seg); + if (ret < 0) { + if (ff_check_interrupt(c->interrupt_callback)) { + goto end; + ret = AVERROR_EXIT; + } + av_log(v->parent, AV_LOG_WARNING, "Failed to open fragment of playlist %d\n", v->rep_idx); + v->cur_seq_no++; + goto restart; + } + } + + if (v->init_sec_buf_read_offset < v->init_sec_data_len) { + /* Push init section out first before first actual fragment */ + int copy_size = FFMIN(v->init_sec_data_len - v->init_sec_buf_read_offset, buf_size); + memcpy(buf, v->init_sec_buf, copy_size); + v->init_sec_buf_read_offset += copy_size; + ret = copy_size; + goto end; + } + + /* check the v->cur_seg, if it is null, get current and double check if the new v->cur_seg*/ + if (!v->cur_seg) { + v->cur_seg = get_current_fragment(v); + } + if (!v->cur_seg) { + ret = AVERROR_EOF; + goto end; + } + ret = read_from_url(v, v->cur_seg, buf, buf_size, READ_NORMAL); + if (ret > 0) + goto end; + ff_format_io_close(v->parent, &v->input); + v->cur_seq_no++; + goto restart; + +end: + return ret; +} + +static int save_avio_options(AVFormatContext *s) +{ + DASHContext *c = s->priv_data; + const char *opts[] = { "headers", "user_agent", "user-agent", "cookies", NULL }, **opt = opts; + uint8_t *buf = NULL; + int ret = 0; + + while (*opt) { + if (av_opt_get(s->pb, *opt, AV_OPT_SEARCH_CHILDREN, &buf) >= 0) { + if (buf) { + ret = av_dict_set(&c->avio_opts, *opt, buf, AV_DICT_DONT_STRDUP_VAL); + if (ret < 0) + return ret; + } + } + opt++; + } + + return ret; +} + +static int nested_io_open(AVFormatContext *s, AVIOContext **pb, const char *url, + int flags, AVDictionary **opts) +{ + av_log(s, AV_LOG_ERROR, + "A HDS playlist item '%s' referred to an external file '%s'. " + "Opening this file was forbidden for security reasons\n", + s->filename, url); + return AVERROR(EPERM); +} + +static int reopen_demux_for_component(AVFormatContext *s, struct representation *pls) +{ + DASHContext *c = s->priv_data; + AVInputFormat *in_fmt = NULL; + AVDictionary *in_fmt_opts = NULL; + uint8_t *avio_ctx_buffer = NULL; + int ret = 0; + + if (pls->ctx) { + /* note: the internal buffer could have changed, and be != avio_ctx_buffer */ + av_freep(&pls->pb.buffer); + memset(&pls->pb, 0x00, sizeof(AVIOContext)); + pls->ctx->pb = NULL; + avformat_close_input(&pls->ctx); + pls->ctx = NULL; + } + if (!(pls->ctx = avformat_alloc_context())) { + ret = AVERROR(ENOMEM); + goto fail; + } + + avio_ctx_buffer = av_malloc(INITIAL_BUFFER_SIZE); + if (!avio_ctx_buffer ){ + ret = AVERROR(ENOMEM); + avformat_free_context(pls->ctx); + pls->ctx = NULL; + goto fail; + } + if (c->is_live) { + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, NULL); + } else { + ffio_init_context(&pls->pb, avio_ctx_buffer , INITIAL_BUFFER_SIZE, 0, pls, read_data, NULL, seek_data); + } + pls->pb.seekable = 0; + + if ((ret = ff_copy_whiteblacklists(pls->ctx, s)) < 0) + goto fail; + + pls->ctx->flags = AVFMT_FLAG_CUSTOM_IO; + pls->ctx->probesize = 1024 * 4; + pls->ctx->max_analyze_duration = 4 * AV_TIME_BASE; + ret = av_probe_input_buffer(&pls->pb, &in_fmt, "", NULL, 0, 0); + if (ret < 0) { + av_log(s, AV_LOG_ERROR, "Error when loading first fragment, playlist %d\n", (int)pls->rep_idx); + avformat_free_context(pls->ctx); + pls->ctx = NULL; + goto fail; + } + + pls->ctx->pb = &pls->pb; + pls->ctx->io_open = nested_io_open; + + // provide additional information from mpd if available + ret = avformat_open_input(&pls->ctx, "", in_fmt, &in_fmt_opts); //pls->init_section->url + av_dict_free(&in_fmt_opts); + if (ret < 0) + goto fail; + if (pls->n_fragments) { + ret = avformat_find_stream_info(pls->ctx, NULL); + if (ret < 0) + goto fail; + } + +fail: + return ret; +} + +static int open_demux_for_component(AVFormatContext *s, struct representation *pls) +{ + int ret = 0; + int i; + + pls->parent = s; + pls->cur_seq_no = calc_cur_seg_no(s, pls); + pls->last_seq_no = calc_max_seg_no(s, pls); + + ret = reopen_demux_for_component(s, pls); + if (ret < 0) { + goto fail; + } + for (i = 0; i < pls->ctx->nb_streams; i++) { + AVStream *st = avformat_new_stream(s, NULL); + AVStream *ist = pls->ctx->streams[i]; + if (!st) { + ret = AVERROR(ENOMEM); + goto fail; + } + st->id = i; + avcodec_parameters_copy(st->codecpar, pls->ctx->streams[i]->codecpar); + avpriv_set_pts_info(st, ist->pts_wrap_bits, ist->time_base.num, ist->time_base.den); + } + + return 0; +fail: + return ret; +} + +static int dash_read_header(AVFormatContext *s) +{ + void *u = (s->flags & AVFMT_FLAG_CUSTOM_IO) ? NULL : s->pb; + DASHContext *c = s->priv_data; + int ret = 0; + int stream_index = 0; + + c->interrupt_callback = &s->interrupt_callback; + // if the URL context is good, read important options we must broker later + if (u) { + update_options(&c->user_agent, "user-agent", u); + update_options(&c->cookies, "cookies", u); + update_options(&c->headers, "headers", u); + } + + if ((ret = parse_manifest(s, s->filename, s->pb)) < 0) + goto fail; + + if ((ret = save_avio_options(s)) < 0) + goto fail; + + /* If this isn't a live stream, fill the total duration of the + * stream. */ + if (!c->is_live) { + s->duration = (int64_t) c->media_presentation_duration_sec * AV_TIME_BASE; + } + + /* Open the demuxer for curent video and current audio components if available */ + if (!ret && c->cur_video) { + ret = open_demux_for_component(s, c->cur_video); + if (!ret) { + c->cur_video->stream_index = stream_index; + ++stream_index; + } else { + free_representation(c->cur_video); + c->cur_video = NULL; + } + } + + if (!ret && c->cur_audio) { + ret = open_demux_for_component(s, c->cur_audio); + if (!ret) { + c->cur_audio->stream_index = stream_index; + ++stream_index; + } else { + free_representation(c->cur_audio); + c->cur_audio = NULL; + } + } + + if (!stream_index) { + ret = AVERROR_INVALIDDATA; + goto fail; + } + + /* Create a program */ + if (!ret) { + AVProgram *program; + program = av_new_program(s, 0); + if (!program) { + goto fail; + } + + if (c->cur_video) { + av_program_add_stream_index(s, 0, c->cur_video->stream_index); + } + + if (c->cur_audio) { + av_program_add_stream_index(s, 0, c->cur_audio->stream_index); + } + } + + return 0; +fail: + return ret; +} + +static int dash_read_packet(AVFormatContext *s, AVPacket *pkt) +{ + DASHContext *c = s->priv_data; + int ret = 0; + struct representation *cur = NULL; + + if (!c->cur_audio && !c->cur_video) { + return AVERROR_INVALIDDATA; + } + if (c->cur_audio && !c->cur_video) { + cur = c->cur_audio; + } else if (!c->cur_audio && c->cur_video) { + cur = c->cur_video; + } else if (c->cur_video->cur_timestamp < c->cur_audio->cur_timestamp) { + cur = c->cur_video; + } else { + cur = c->cur_audio; + } + + if (cur->ctx) { + ret = av_read_frame(cur->ctx, &cur->pkt); + if (ret < 0) { + av_packet_unref(&cur->pkt); + } else { + /* If we got a packet, return it */ + *pkt = cur->pkt; + cur->cur_timestamp = av_rescale(pkt->pts, (int64_t)cur->ctx->streams[0]->time_base.num * 90000, cur->ctx->streams[0]->time_base.den); + pkt->stream_index = cur->stream_index; + reset_packet(&cur->pkt); + return 0; + } + } + return AVERROR_EOF; +} + +static int dash_close(AVFormatContext *s) +{ + DASHContext *c = s->priv_data; + + if (c->cur_audio) { + free_representation(c->cur_audio); + } + + if (c->cur_video) { + free_representation(c->cur_video); + } + + av_freep(&c->cookies); + av_freep(&c->user_agent); + av_dict_free(&c->avio_opts); + av_freep(&c->base_url); + return 0; +} + +static int dash_seek(AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags) +{ + int ret = 0; + int i = 0; + int j = 0; + int64_t duration = 0; + + av_log(pls->parent, AV_LOG_VERBOSE, "DASH seek pos[%"PRId64"ms], playlist %d\n", seek_pos_msec, pls->rep_idx); + + // single fragment mode + if (pls->n_fragments) { + pls->cur_timestamp = 0; + pls->cur_seg_offset = 0; + ff_read_frame_flush(pls->ctx); + return av_seek_frame(pls->ctx, -1, seek_pos_msec*1000, flags); + } + + if (pls->input) + ff_format_io_close(pls->parent, &pls->input); + + // find the nearest fragment + if (pls->n_timelines > 0 && pls->fragment_timescale > 0) { + int64_t num = pls->first_seq_no; + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline start n_timelines[%d] last_seq_no[%"PRId64"], playlist %d.\n", + (int)pls->n_timelines, (int64_t)pls->last_seq_no, (int)pls->rep_idx); + for (i = 0; i < pls->n_timelines; i++) { + if (pls->timelines[i]->t > 0) { + duration = pls->timelines[i]->t; + } + duration += pls->timelines[i]->d; + if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) { + goto set_seq_num; + } + for (j = 0; j < pls->timelines[i]->r; j++) { + duration += pls->timelines[i]->d; + num++; + if (seek_pos_msec < ((duration * 1000) / pls->fragment_timescale)) { + goto set_seq_num; + } + } + num++; + } + +set_seq_num: + pls->cur_seq_no = num > pls->last_seq_no ? pls->last_seq_no : num; + av_log(pls->parent, AV_LOG_VERBOSE, "dash_seek with SegmentTimeline end cur_seq_no[%"PRId64"], playlist %d.\n", + (int64_t)pls->cur_seq_no, (int)pls->rep_idx); + } else if (pls->fragment_duration > 0) { + pls->cur_seq_no = pls->first_seq_no + ((seek_pos_msec * pls->fragment_timescale) / pls->fragment_duration) / 1000; + } else { + av_log(pls->parent, AV_LOG_ERROR, "dash_seek missing fragment_duration\n"); + pls->cur_seq_no = pls->first_seq_no; + } + pls->cur_timestamp = 0; + pls->cur_seg_offset = 0; + pls->init_sec_buf_read_offset = 0; + ret = reopen_demux_for_component(s, pls); + + return ret; +} + +static int dash_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags) +{ + int ret = 0; + DASHContext *c = s->priv_data; + int64_t seek_pos_msec = av_rescale_rnd(timestamp, 1000, + s->streams[stream_index]->time_base.den, + flags & AVSEEK_FLAG_BACKWARD ? + AV_ROUND_DOWN : AV_ROUND_UP); + if ((flags & AVSEEK_FLAG_BYTE) || c->is_live) + return AVERROR(ENOSYS); + if (c->cur_audio) { + ret = dash_seek(s, c->cur_audio, seek_pos_msec, flags); + } + if (!ret && c->cur_video) { + ret = dash_seek(s, c->cur_video, seek_pos_msec, flags); + } + return ret; +} + +static int dash_probe(AVProbeData *p) +{ + if (!av_stristr(p->buf, "<MPD")) + return 0; + + if (av_stristr(p->buf, "dash:profile:isoff-on-demand:2011") || + av_stristr(p->buf, "dash:profile:isoff-live:2011") || + av_stristr(p->buf, "dash:profile:isoff-live:2012") || + av_stristr(p->buf, "dash:profile:isoff-main:2011")) { + return AVPROBE_SCORE_MAX; + } + if (av_stristr(p->buf, "dash:profile")) { + return AVPROBE_SCORE_MAX >> 1; + } + + return 0; +} + +#define OFFSET(x) offsetof(DASHContext, x) +#define FLAGS AV_OPT_FLAG_DECODING_PARAM +static const AVOption dash_options[] = { + {"audio_rep_index", "audio representation index to be used", OFFSET(audio_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, FLAGS}, + {"video_rep_index", "video representation index to be used", OFFSET(video_rep_index), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, FLAGS}, + {NULL} +}; + +static const AVClass dash_class = { + .class_name = "dash", + .item_name = av_default_item_name, + .option = dash_options, + .version = LIBAVUTIL_VERSION_INT, +}; + +AVInputFormat ff_dash_demuxer = { + .name = "dash", + .long_name = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"), + .priv_class = &dash_class, + .priv_data_size = sizeof(DASHContext), + .read_probe = dash_probe, + .read_header = dash_read_header, + .read_packet = dash_read_packet, + .read_close = dash_close, + .read_seek = dash_read_seek, + .flags = AVFMT_NO_BYTE_SEEK, +};