@@ -132,7 +132,7 @@ OBJS-$(CONFIG_CONCAT_DEMUXER) += concatdec.o
OBJS-$(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_MUXER) += dash.o dashenc.o
OBJS-$(CONFIG_DAUD_DEMUXER) += dauddec.o
OBJS-$(CONFIG_DAUD_MUXER) += daudenc.o
OBJS-$(CONFIG_DCSTR_DEMUXER) += dcstr.o
new file mode 100644
@@ -0,0 +1,136 @@
+#include "config.h"
+#if HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#include "libavutil/avassert.h"
+#include "libavutil/avstring.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/opt.h"
+#include "libavutil/rational.h"
+#include "libavutil/time_internal.h"
+
+#include "avc.h"
+#include "avformat.h"
+#include "avio_internal.h"
+#include "internal.h"
+#include "isom.h"
+#include "os_support.h"
+#include "url.h"
+#include "dash.h"
+
+static DASHTmplId dash_read_tmpl_id(const char *identifier, char *format_tag,
+ size_t format_tag_size, const char **ptr) {
+ const char *next_ptr;
+ DASHTmplId id_type = DASH_TMPL_ID_UNDEFINED;
+
+ if (av_strstart(identifier, "$$", &next_ptr)) {
+ id_type = DASH_TMPL_ID_ESCAPE;
+ *ptr = next_ptr;
+ } else if (av_strstart(identifier, "$RepresentationID$", &next_ptr)) {
+ id_type = DASH_TMPL_ID_REP_ID;
+ // default to basic format, as $RepresentationID$ identifiers
+ // are not allowed to have custom format-tags.
+ av_strlcpy(format_tag, "%d", format_tag_size);
+ *ptr = next_ptr;
+ } else { // the following identifiers may have an explicit format_tag
+ if (av_strstart(identifier, "$Number", &next_ptr))
+ id_type = DASH_TMPL_ID_NUMBER;
+ else if (av_strstart(identifier, "$Bandwidth", &next_ptr))
+ id_type = DASH_TMPL_ID_BANDWIDTH;
+ else if (av_strstart(identifier, "$Time", &next_ptr))
+ id_type = DASH_TMPL_ID_TIME;
+ else
+ id_type = DASH_TMPL_ID_UNDEFINED;
+
+ // next parse the dash format-tag and generate a c-string format tag
+ // (next_ptr now points at the first '%' at the beginning of the format-tag)
+ if (id_type != DASH_TMPL_ID_UNDEFINED) {
+ const char *number_format = (id_type == DASH_TMPL_ID_TIME) ? PRId64 : "d";
+ if (next_ptr[0] == '$') { // no dash format-tag
+ snprintf(format_tag, format_tag_size, "%%%s", number_format);
+ *ptr = &next_ptr[1];
+ } else {
+ const char *width_ptr;
+ // only tolerate single-digit width-field (i.e. up to 9-digit width)
+ if (av_strstart(next_ptr, "%0", &width_ptr) &&
+ av_isdigit(width_ptr[0]) &&
+ av_strstart(&width_ptr[1], "d$", &next_ptr)) {
+ // yes, we're using a format tag to build format_tag.
+ snprintf(format_tag, format_tag_size, "%s%c%s", "%0", width_ptr[0], number_format);
+ *ptr = next_ptr;
+ } else {
+ av_log(NULL, AV_LOG_WARNING, "Failed to parse format-tag beginning with %s. Expected either a "
+ "closing '$' character or a format-string like '%%0[width]d', "
+ "where width must be a single digit\n", next_ptr);
+ id_type = DASH_TMPL_ID_UNDEFINED;
+ }
+ }
+ }
+ }
+ return id_type;
+}
+
+void ff_dash_fill_tmpl_params(char *dst, size_t buffer_size,
+ const char *template, int rep_id,
+ int number, int bit_rate,
+ int64_t time) {
+ int dst_pos = 0;
+ const char *t_cur = template;
+ while (dst_pos < buffer_size - 1 && *t_cur) {
+ char format_tag[7]; // May be "%d", "%0Xd", or "%0Xlld" (for $Time$), where X is in [0-9]
+ int n = 0;
+ DASHTmplId id_type;
+ const char *t_next = strchr(t_cur, '$'); // copy over everything up to the first '$' character
+ if (t_next) {
+ int num_copy_bytes = FFMIN(t_next - t_cur, buffer_size - dst_pos - 1);
+ av_strlcpy(&dst[dst_pos], t_cur, num_copy_bytes + 1);
+ // advance
+ dst_pos += num_copy_bytes;
+ t_cur = t_next;
+ } else { // no more DASH identifiers to substitute - just copy the rest over and break
+ av_strlcpy(&dst[dst_pos], t_cur, buffer_size - dst_pos);
+ break;
+ }
+
+ if (dst_pos >= buffer_size - 1 || !*t_cur)
+ break;
+
+ // t_cur is now pointing to a '$' character
+ id_type = dash_read_tmpl_id(t_cur, format_tag, sizeof(format_tag), &t_next);
+ switch (id_type) {
+ case DASH_TMPL_ID_ESCAPE:
+ av_strlcpy(&dst[dst_pos], "$", 2);
+ n = 1;
+ break;
+ case DASH_TMPL_ID_REP_ID:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, rep_id);
+ break;
+ case DASH_TMPL_ID_NUMBER:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, number);
+ break;
+ case DASH_TMPL_ID_BANDWIDTH:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, bit_rate);
+ break;
+ case DASH_TMPL_ID_TIME:
+ n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, time);
+ break;
+ case DASH_TMPL_ID_UNDEFINED:
+ // copy over one byte and advance
+ av_strlcpy(&dst[dst_pos], t_cur, 2);
+ n = 1;
+ t_next = &t_cur[1];
+ break;
+ }
+ // t_next points just past the processed identifier
+ // n is the number of bytes that were attempted to be written to dst
+ // (may have failed to write all because buffer_size).
+
+ // advance
+ dst_pos += FFMIN(n, buffer_size - dst_pos - 1);
+ t_cur = t_next;
+ }
+}
+
+
new file mode 100644
@@ -0,0 +1,39 @@
+/*
+ * MPEG-DASH ISO BMFF segmenter
+ * Copyright (c) 2014 Martin Storsjo
+ *
+ * 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
+ */
+
+#ifndef AVFORMAT_DASH_H
+#define AVFORMAT_DASH_H
+#include "avformat.h"
+
+// See ISO/IEC 23009-1:2014 5.3.9.4.4
+typedef enum {
+ DASH_TMPL_ID_UNDEFINED = -1,
+ DASH_TMPL_ID_ESCAPE,
+ DASH_TMPL_ID_REP_ID,
+ DASH_TMPL_ID_NUMBER,
+ DASH_TMPL_ID_BANDWIDTH,
+ DASH_TMPL_ID_TIME,
+} DASHTmplId;
+
+
+void ff_dash_fill_tmpl_params(char *dst, size_t buffer_size, const char *template, int rep_id, int number, int bit_rate, int64_t time);
+
+#endif /* AVFORMAT_DASH_H */
@@ -39,16 +39,7 @@
#include "isom.h"
#include "os_support.h"
#include "url.h"
-
-// See ISO/IEC 23009-1:2014 5.3.9.4.4
-typedef enum {
- DASH_TMPL_ID_UNDEFINED = -1,
- DASH_TMPL_ID_ESCAPE,
- DASH_TMPL_ID_REP_ID,
- DASH_TMPL_ID_NUMBER,
- DASH_TMPL_ID_BANDWIDTH,
- DASH_TMPL_ID_TIME,
-} DASHTmplId;
+#include "dash.h"
typedef struct Segment {
char file[1024];
@@ -259,119 +250,6 @@ static void output_segment_list(OutputStream *os, AVIOContext *out, DASHContext
}
}
-static DASHTmplId dash_read_tmpl_id(const char *identifier, char *format_tag,
- size_t format_tag_size, const char **ptr) {
- const char *next_ptr;
- DASHTmplId id_type = DASH_TMPL_ID_UNDEFINED;
-
- if (av_strstart(identifier, "$$", &next_ptr)) {
- id_type = DASH_TMPL_ID_ESCAPE;
- *ptr = next_ptr;
- } else if (av_strstart(identifier, "$RepresentationID$", &next_ptr)) {
- id_type = DASH_TMPL_ID_REP_ID;
- // default to basic format, as $RepresentationID$ identifiers
- // are not allowed to have custom format-tags.
- av_strlcpy(format_tag, "%d", format_tag_size);
- *ptr = next_ptr;
- } else { // the following identifiers may have an explicit format_tag
- if (av_strstart(identifier, "$Number", &next_ptr))
- id_type = DASH_TMPL_ID_NUMBER;
- else if (av_strstart(identifier, "$Bandwidth", &next_ptr))
- id_type = DASH_TMPL_ID_BANDWIDTH;
- else if (av_strstart(identifier, "$Time", &next_ptr))
- id_type = DASH_TMPL_ID_TIME;
- else
- id_type = DASH_TMPL_ID_UNDEFINED;
-
- // next parse the dash format-tag and generate a c-string format tag
- // (next_ptr now points at the first '%' at the beginning of the format-tag)
- if (id_type != DASH_TMPL_ID_UNDEFINED) {
- const char *number_format = (id_type == DASH_TMPL_ID_TIME) ? PRId64 : "d";
- if (next_ptr[0] == '$') { // no dash format-tag
- snprintf(format_tag, format_tag_size, "%%%s", number_format);
- *ptr = &next_ptr[1];
- } else {
- const char *width_ptr;
- // only tolerate single-digit width-field (i.e. up to 9-digit width)
- if (av_strstart(next_ptr, "%0", &width_ptr) &&
- av_isdigit(width_ptr[0]) &&
- av_strstart(&width_ptr[1], "d$", &next_ptr)) {
- // yes, we're using a format tag to build format_tag.
- snprintf(format_tag, format_tag_size, "%s%c%s", "%0", width_ptr[0], number_format);
- *ptr = next_ptr;
- } else {
- av_log(NULL, AV_LOG_WARNING, "Failed to parse format-tag beginning with %s. Expected either a "
- "closing '$' character or a format-string like '%%0[width]d', "
- "where width must be a single digit\n", next_ptr);
- id_type = DASH_TMPL_ID_UNDEFINED;
- }
- }
- }
- }
- return id_type;
-}
-
-static void dash_fill_tmpl_params(char *dst, size_t buffer_size,
- const char *template, int rep_id,
- int number, int bit_rate,
- int64_t time) {
- int dst_pos = 0;
- const char *t_cur = template;
- while (dst_pos < buffer_size - 1 && *t_cur) {
- char format_tag[7]; // May be "%d", "%0Xd", or "%0Xlld" (for $Time$), where X is in [0-9]
- int n = 0;
- DASHTmplId id_type;
- const char *t_next = strchr(t_cur, '$'); // copy over everything up to the first '$' character
- if (t_next) {
- int num_copy_bytes = FFMIN(t_next - t_cur, buffer_size - dst_pos - 1);
- av_strlcpy(&dst[dst_pos], t_cur, num_copy_bytes + 1);
- // advance
- dst_pos += num_copy_bytes;
- t_cur = t_next;
- } else { // no more DASH identifiers to substitute - just copy the rest over and break
- av_strlcpy(&dst[dst_pos], t_cur, buffer_size - dst_pos);
- break;
- }
-
- if (dst_pos >= buffer_size - 1 || !*t_cur)
- break;
-
- // t_cur is now pointing to a '$' character
- id_type = dash_read_tmpl_id(t_cur, format_tag, sizeof(format_tag), &t_next);
- switch (id_type) {
- case DASH_TMPL_ID_ESCAPE:
- av_strlcpy(&dst[dst_pos], "$", 2);
- n = 1;
- break;
- case DASH_TMPL_ID_REP_ID:
- n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, rep_id);
- break;
- case DASH_TMPL_ID_NUMBER:
- n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, number);
- break;
- case DASH_TMPL_ID_BANDWIDTH:
- n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, bit_rate);
- break;
- case DASH_TMPL_ID_TIME:
- n = snprintf(&dst[dst_pos], buffer_size - dst_pos, format_tag, time);
- break;
- case DASH_TMPL_ID_UNDEFINED:
- // copy over one byte and advance
- av_strlcpy(&dst[dst_pos], t_cur, 2);
- n = 1;
- t_next = &t_cur[1];
- break;
- }
- // t_next points just past the processed identifier
- // n is the number of bytes that were attempted to be written to dst
- // (may have failed to write all because buffer_size).
-
- // advance
- dst_pos += FFMIN(n, buffer_size - dst_pos - 1);
- t_cur = t_next;
- }
-}
-
static char *xmlescape(const char *str) {
int outlen = strlen(str)*3/2 + 6;
char *out = av_realloc(NULL, outlen + 1);
@@ -660,11 +538,11 @@ static int dash_init(AVFormatContext *s)
if (c->single_file) {
if (c->single_file_name)
- dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
+ ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->single_file_name, i, 0, os->bit_rate, 0);
else
snprintf(os->initfile, sizeof(os->initfile), "%s-stream%d.m4s", basename, i);
} else {
- dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
+ ff_dash_fill_tmpl_params(os->initfile, sizeof(os->initfile), c->init_seg_name, i, 0, os->bit_rate, 0);
}
snprintf(filename, sizeof(filename), "%s%s", c->dirname, os->initfile);
ret = s->io_open(s, &os->out, filename, AVIO_FLAG_WRITE, NULL);
@@ -865,7 +743,7 @@ static int dash_flush(AVFormatContext *s, int final, int stream)
start_pos = avio_tell(os->ctx->pb);
if (!c->single_file) {
- dash_fill_tmpl_params(filename, sizeof(filename), c->media_seg_name, i, os->segment_index, os->bit_rate, os->start_pts);
+ ff_dash_fill_tmpl_params(filename, sizeof(filename), c->media_seg_name, i, os->segment_index, os->bit_rate, os->start_pts);
snprintf(full_path, sizeof(full_path), "%s%s", c->dirname, filename);
snprintf(temp_path, sizeof(temp_path), use_rename ? "%s.tmp" : "%s", full_path);
ret = s->io_open(s, &os->out, temp_path, AVIO_FLAG_WRITE, NULL);
move from dashenc, move DASHTmplId and dash_fill_tmpl_params to dash.c, they will be used by dash demuxer and dash muxer. v2 fixed: 1. rename common file from dashcomm.* to dash.* Suggested-by: Hendrik Leppkes <h.leppkes@gmail.com> v3 fixed: 1. rename header file pre defined 2. add ff_ prefix for the internal API Suggested-by: James Almer <jamrial@gmail.com> Suggested-by: Timo Rothenpieler <timo@rothenpieler.org> Signed-off-by: Steven Liu <lq@onvideo.cn> --- libavformat/Makefile | 2 +- libavformat/dash.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++ libavformat/dash.h | 39 +++++++++++++++ libavformat/dashenc.c | 130 ++--------------------------------------------- 4 files changed, 180 insertions(+), 127 deletions(-) create mode 100644 libavformat/dash.c create mode 100644 libavformat/dash.h