From 84418c7dd384e9b3e42a2c43f4823ff4816e634e Mon Sep 17 00:00:00 2001
From: Shivam Goyal <shivgo@iitk.ac.in>
Date: Sun, 24 Mar 2019 16:19:05 +0530
Subject: [PATCH] Added XV file support
---
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/xvdec.c | 1395 ++++++++++++++++++++++++++++++++++++++
libavformat/xvtools.h | 95 +++
4 files changed, 1492 insertions(+)
create mode 100644 libavformat/xvdec.c
create mode 100644 libavformat/xvtools.h
@@ -187,6 +187,7 @@ OBJS-$(CONFIG_FLAC_MUXER) += flacenc.o flacenc_header.o \
vorbiscomment.o
OBJS-$(CONFIG_FLIC_DEMUXER) += flic.o
OBJS-$(CONFIG_FLV_DEMUXER) += flvdec.o
+OBJS-$(CONFIG_XV_DEMUXER) += xvdec.o
OBJS-$(CONFIG_LIVE_FLV_DEMUXER) += flvdec.o
OBJS-$(CONFIG_FLV_MUXER) += flvenc.o avc.o
OBJS-$(CONFIG_FOURXM_DEMUXER) += 4xm.o
@@ -144,6 +144,7 @@ extern AVInputFormat ff_flac_demuxer;
extern AVOutputFormat ff_flac_muxer;
extern AVInputFormat ff_flic_demuxer;
extern AVInputFormat ff_flv_demuxer;
+extern AVInputFormat ff_xv_demuxer;
extern AVOutputFormat ff_flv_muxer;
extern AVInputFormat ff_live_flv_demuxer;
extern AVInputFormat ff_fourxm_demuxer;
new file mode 100644
@@ -0,0 +1,1395 @@
+// /*
+// * XV demuxer
+// * Copyright (c) 2003 The FFmpeg Project
+// *
+// * This demuxer will generate a 1 byte extradata for VP6F content.
+// * It is composed of:
+// * - upper 4 bits: difference between encoded width and visible width
+// * - lower 4 bits: difference between encoded height and visible height
+// *
+// * 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 "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/dict.h"
+#include "libavutil/opt.h"
+#include "libavutil/intfloat.h"
+#include "libavutil/mathematics.h"
+#include "libavcodec/bytestream.h"
+#include "libavcodec/mpeg4audio.h"
+#include "avformat.h"
+#include "internal.h"
+#include "avio_internal.h"
+#include "flv.h"
+#include "xvtools.h"
+#define VALIDATE_INDEX_TS_THRESH 2500
+
+#define RESYNC_BUFFER_SIZE (1<<20)
+
+typedef struct XVContext {
+ const AVClass *class; ///< Class for private options.
+ int trust_metadata; ///< configure streams according onMetaData
+ int trust_datasize; ///< trust data size of FLVTag
+ int dump_full_metadata; ///< Dump full metadata of the onMetadata
+ int wrong_dts; ///< wrong dts due to negative cts
+ uint8_t *new_extradata[FLV_STREAM_TYPE_NB];
+ int new_extradata_size[FLV_STREAM_TYPE_NB];
+ int last_sample_rate;
+ int last_channels;
+ struct {
+ int64_t dts;
+ int64_t pos;
+ } validate_index[2];
+ int validate_next;
+ int validate_count;
+ int searched_for_end;
+
+ uint8_t resync_buffer[2*RESYNC_BUFFER_SIZE];
+
+ int broken_sizes;
+ int sum_flv_tag_size;
+
+ int last_keyframe_stream_index;
+ int keyframe_count;
+ int64_t video_bit_rate;
+ int64_t audio_bit_rate;
+ int64_t *keyframe_times;
+ int64_t *keyframe_filepositions;
+ int missing_streams;
+ AVRational framerate;
+ int64_t last_ts;
+ int64_t time_offset;
+ int64_t time_pos;
+ int rot_value; ///< The value by which some bytes are encrypted
+} XVContext;
+
+
+static int xv_probe(AVProbeData *p)
+{
+ const uint8_t *d = p->buf;
+
+ if(d[0] == 'X' && d[1] == 'L' && d[2] == 'V' && d[3] =='F'){
+ return AVPROBE_SCORE_MAX;
+ }
+
+ return 0;
+}
+
+static void add_keyframes_index(AVFormatContext *s)
+{
+ XVContext *xv = s->priv_data;
+ AVStream *stream = NULL;
+ unsigned int i = 0;
+
+ if (xv->last_keyframe_stream_index < 0) {
+ av_log(s, AV_LOG_DEBUG, "keyframe stream hasn't been created\n");
+ return;
+ }
+
+ av_assert0(xv->last_keyframe_stream_index <= s->nb_streams);
+ stream = s->streams[xv->last_keyframe_stream_index];
+
+ if (stream->nb_index_entries == 0) {
+ for (i = 0; i < xv->keyframe_count; i++) {
+ av_log(s, AV_LOG_TRACE, "keyframe filepositions = %"PRId64" times = %"PRId64"\n",
+ xv->keyframe_filepositions[i], xv->keyframe_times[i] * 1000);
+ av_add_index_entry(stream, xv->keyframe_filepositions[i],
+ xv->keyframe_times[i] * 1000, 0, 0, AVINDEX_KEYFRAME);
+ }
+ } else
+ av_log(s, AV_LOG_WARNING, "Skipping duplicate index\n");
+
+ if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+ av_freep(&xv->keyframe_times);
+ av_freep(&xv->keyframe_filepositions);
+ xv->keyframe_count = 0;
+ }
+}
+
+static AVStream *create_stream(AVFormatContext *s, int codec_type)
+{
+ XVContext *xv = s->priv_data;
+ AVStream *st = avformat_new_stream(s, NULL);
+ if (!st)
+ return NULL;
+ st->codecpar->codec_type = codec_type;
+ if (s->nb_streams>=3 ||( s->nb_streams==2
+ && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE
+ && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE
+ && s->streams[0]->codecpar->codec_type != AVMEDIA_TYPE_DATA
+ && s->streams[1]->codecpar->codec_type != AVMEDIA_TYPE_DATA))
+ s->ctx_flags &= ~AVFMTCTX_NOHEADER;
+ if (codec_type == AVMEDIA_TYPE_AUDIO) {
+ st->codecpar->bit_rate = xv->audio_bit_rate;
+ xv->missing_streams &= ~FLV_HEADER_FLAG_HASAUDIO;
+ }
+ if (codec_type == AVMEDIA_TYPE_VIDEO) {
+ st->codecpar->bit_rate = xv->video_bit_rate;
+ xv->missing_streams &= ~FLV_HEADER_FLAG_HASVIDEO;
+ st->avg_frame_rate = xv->framerate;
+ }
+
+
+ avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
+ xv->last_keyframe_stream_index = s->nb_streams - 1;
+ add_keyframes_index(s);
+ return st;
+}
+
+static int flv_same_audio_codec(AVCodecParameters *apar, int flags)
+{
+ int bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
+ int flv_codecid = flags & FLV_AUDIO_CODECID_MASK;
+ int codec_id;
+
+ if (!apar->codec_id && !apar->codec_tag)
+ return 1;
+
+ if (apar->bits_per_coded_sample != bits_per_coded_sample)
+ return 0;
+
+ switch (flv_codecid) {
+ // no distinction between S16 and S8 PCM codec flags
+ case FLV_CODECID_PCM:
+ codec_id = bits_per_coded_sample == 8
+ ? AV_CODEC_ID_PCM_U8
+#if HAVE_BIGENDIAN
+ : AV_CODEC_ID_PCM_S16BE;
+#else
+ : AV_CODEC_ID_PCM_S16LE;
+#endif
+ return codec_id == apar->codec_id;
+ case FLV_CODECID_PCM_LE:
+ codec_id = bits_per_coded_sample == 8
+ ? AV_CODEC_ID_PCM_U8
+ : AV_CODEC_ID_PCM_S16LE;
+ return codec_id == apar->codec_id;
+ case FLV_CODECID_AAC:
+ return apar->codec_id == AV_CODEC_ID_AAC;
+ case FLV_CODECID_ADPCM:
+ return apar->codec_id == AV_CODEC_ID_ADPCM_SWF;
+ case FLV_CODECID_SPEEX:
+ return apar->codec_id == AV_CODEC_ID_SPEEX;
+ case FLV_CODECID_MP3:
+ return apar->codec_id == AV_CODEC_ID_MP3;
+ case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
+ case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
+ case FLV_CODECID_NELLYMOSER:
+ return apar->codec_id == AV_CODEC_ID_NELLYMOSER;
+ case FLV_CODECID_PCM_MULAW:
+ return apar->sample_rate == 8000 &&
+ apar->codec_id == AV_CODEC_ID_PCM_MULAW;
+ case FLV_CODECID_PCM_ALAW:
+ return apar->sample_rate == 8000 &&
+ apar->codec_id == AV_CODEC_ID_PCM_ALAW;
+ default:
+ return apar->codec_tag == (flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
+ }
+}
+
+static void xv_set_audio_codec(AVFormatContext *s, AVStream *astream,
+ AVCodecParameters *apar, int flv_codecid)
+{
+ switch (flv_codecid) {
+ // no distinction between S16 and S8 PCM codec flags
+ case FLV_CODECID_PCM:
+ apar->codec_id = apar->bits_per_coded_sample == 8
+ ? AV_CODEC_ID_PCM_U8
+#if HAVE_BIGENDIAN
+ : AV_CODEC_ID_PCM_S16BE;
+#else
+ : AV_CODEC_ID_PCM_S16LE;
+#endif
+ break;
+ case FLV_CODECID_PCM_LE:
+ apar->codec_id = apar->bits_per_coded_sample == 8
+ ? AV_CODEC_ID_PCM_U8
+ : AV_CODEC_ID_PCM_S16LE;
+ break;
+ case FLV_CODECID_AAC:
+ apar->codec_id = AV_CODEC_ID_AAC;
+ break;
+ case FLV_CODECID_ADPCM:
+ apar->codec_id = AV_CODEC_ID_ADPCM_SWF;
+ break;
+ case FLV_CODECID_SPEEX:
+ apar->codec_id = AV_CODEC_ID_SPEEX;
+ apar->sample_rate = 16000;
+ break;
+ case FLV_CODECID_MP3:
+ apar->codec_id = AV_CODEC_ID_MP3;
+ astream->need_parsing = AVSTREAM_PARSE_FULL;
+ break;
+ case FLV_CODECID_NELLYMOSER_8KHZ_MONO:
+ // in case metadata does not otherwise declare samplerate
+ apar->sample_rate = 8000;
+ apar->codec_id = AV_CODEC_ID_NELLYMOSER;
+ break;
+ case FLV_CODECID_NELLYMOSER_16KHZ_MONO:
+ apar->sample_rate = 16000;
+ apar->codec_id = AV_CODEC_ID_NELLYMOSER;
+ break;
+ case FLV_CODECID_NELLYMOSER:
+ apar->codec_id = AV_CODEC_ID_NELLYMOSER;
+ break;
+ case FLV_CODECID_PCM_MULAW:
+ apar->sample_rate = 8000;
+ apar->codec_id = AV_CODEC_ID_PCM_MULAW;
+ break;
+ case FLV_CODECID_PCM_ALAW:
+ apar->sample_rate = 8000;
+ apar->codec_id = AV_CODEC_ID_PCM_ALAW;
+ break;
+ default:
+ avpriv_request_sample(s, "Audio codec (%x)",
+ flv_codecid >> FLV_AUDIO_CODECID_OFFSET);
+ apar->codec_tag = flv_codecid >> FLV_AUDIO_CODECID_OFFSET;
+ }
+}
+
+static int flv_same_video_codec(AVCodecParameters *vpar, int flags)
+{
+ int flv_codecid = flags & FLV_VIDEO_CODECID_MASK;
+
+ if (!vpar->codec_id && !vpar->codec_tag)
+ return 1;
+
+ switch (flv_codecid) {
+ case FLV_CODECID_H263:
+ return vpar->codec_id == AV_CODEC_ID_FLV1;
+ case FLV_CODECID_SCREEN:
+ return vpar->codec_id == AV_CODEC_ID_FLASHSV;
+ case FLV_CODECID_SCREEN2:
+ return vpar->codec_id == AV_CODEC_ID_FLASHSV2;
+ case FLV_CODECID_VP6:
+ return vpar->codec_id == AV_CODEC_ID_VP6F;
+ case FLV_CODECID_VP6A:
+ return vpar->codec_id == AV_CODEC_ID_VP6A;
+ case FLV_CODECID_H264:
+ return vpar->codec_id == AV_CODEC_ID_H264;
+ default:
+ return vpar->codec_tag == flv_codecid;
+ }
+}
+
+static int xv_set_video_codec(AVFormatContext *s, AVStream *vstream,
+ int flv_codecid, int read)
+{
+ int ret = 0;
+ AVCodecParameters *par = vstream->codecpar;
+ enum AVCodecID old_codec_id = vstream->codecpar->codec_id;
+ switch (flv_codecid) {
+ case FLV_CODECID_H263:
+ par->codec_id = AV_CODEC_ID_FLV1;
+ break;
+ case FLV_CODECID_REALH263:
+ par->codec_id = AV_CODEC_ID_H263;
+ break; // Really mean it this time
+ case FLV_CODECID_SCREEN:
+ par->codec_id = AV_CODEC_ID_FLASHSV;
+ break;
+ case FLV_CODECID_SCREEN2:
+ par->codec_id = AV_CODEC_ID_FLASHSV2;
+ break;
+ case FLV_CODECID_VP6:
+ par->codec_id = AV_CODEC_ID_VP6F;
+ case FLV_CODECID_VP6A:
+ if (flv_codecid == FLV_CODECID_VP6A)
+ par->codec_id = AV_CODEC_ID_VP6A;
+ if (read) {
+ if (par->extradata_size != 1) {
+ ff_alloc_extradata(par, 1);
+ }
+ if (par->extradata)
+ par->extradata[0] = avio_r8(s->pb);
+ else
+ avio_skip(s->pb, 1);
+ }
+ ret = 1; // 1 byte body size adjustment for xv_read_packet()
+ break;
+ case FLV_CODECID_H264:
+ par->codec_id = AV_CODEC_ID_H264;
+ vstream->need_parsing = AVSTREAM_PARSE_HEADERS;
+ ret = 3; // not 4, reading packet type will consume one byte
+ break;
+ case FLV_CODECID_MPEG4:
+ par->codec_id = AV_CODEC_ID_MPEG4;
+ ret = 3;
+ break;
+ default:
+ avpriv_request_sample(s, "Video codec (%x)", flv_codecid);
+ par->codec_tag = flv_codecid;
+ }
+
+ if (!vstream->internal->need_context_update && par->codec_id != old_codec_id) {
+ avpriv_request_sample(s, "Changing the codec id midstream");
+ return AVERROR_PATCHWELCOME;
+ }
+
+ return ret;
+}
+
+static int amf_get_string(AVIOContext *ioc, char *buffer, int buffsize, int rot)
+{
+
+ int length = xvio_rb16(ioc, rot);
+ if (length >= buffsize) {
+ avio_skip(ioc, length);
+ return -1;
+ }
+ int64_t curr_pos = avio_tell(ioc);
+ avio_read(ioc, buffer, length);
+
+ buffer[length] = '\0';
+ int ret = xv_string_decrypt(curr_pos, buffer, length, rot);
+ if(ret != 0){
+ return -1;
+ }
+ return length;
+}
+
+static int parse_keyframes_index(AVFormatContext *s, AVIOContext *ioc, int64_t max_pos)
+{
+ XVContext *xv = s->priv_data;
+ unsigned int timeslen = 0, fileposlen = 0, i;
+ char str_val[256];
+ int64_t *times = NULL;
+ int64_t *filepositions = NULL;
+ int ret = AVERROR(ENOSYS);
+ int64_t initial_pos = avio_tell(ioc);
+ int rot;
+ if(xv->rot_value){
+ rot=xv->rot_value;
+ }
+ else{
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+
+ if (xv->keyframe_count > 0) {
+ av_log(s, AV_LOG_DEBUG, "keyframes have been paresed\n");
+ return 0;
+ }
+ av_assert0(!xv->keyframe_times);
+ av_assert0(!xv->keyframe_filepositions);
+
+ if (s->flags & AVFMT_FLAG_IGNIDX)
+ return 0;
+
+ while (avio_tell(ioc) < max_pos - 2 &&
+ amf_get_string(ioc, str_val, sizeof(str_val), rot) > 0) {
+ int64_t **current_array;
+ unsigned int arraylen;
+
+ // Expect array object in context
+ if (xvio_r8(ioc, rot) != AMF_DATA_TYPE_ARRAY)
+ break;
+
+ arraylen = xvio_rb32(ioc, rot);
+ if (arraylen>>28)
+ break;
+
+ if (!strcmp(KEYFRAMES_TIMESTAMP_TAG , str_val) && !times) {
+ current_array = ×
+ timeslen = arraylen;
+ } else if (!strcmp(KEYFRAMES_BYTEOFFSET_TAG, str_val) &&
+ !filepositions) {
+ current_array = &filepositions;
+ fileposlen = arraylen;
+ } else
+ // unexpected metatag inside keyframes, will not use such
+ // metadata for indexing
+ break;
+
+ if (!(*current_array = av_mallocz(sizeof(**current_array) * arraylen))) {
+ ret = AVERROR(ENOMEM);
+ goto finish;
+ }
+
+ for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++) {
+ if (xvio_r8(ioc, rot) != AMF_DATA_TYPE_NUMBER)
+ goto invalid;
+ current_array[0][i] = av_int2double(xvio_rb64(ioc, rot));
+ }
+ if (times && filepositions) {
+ // All done, exiting at a position allowing amf_parse_object
+ // to finish parsing the object
+ ret = 0;
+ break;
+ }
+ }
+
+ if (timeslen == fileposlen && fileposlen>1 && max_pos <= filepositions[0]) {
+ for (i = 0; i < FFMIN(2,fileposlen); i++) {
+ xv->validate_index[i].pos = filepositions[i];
+ xv->validate_index[i].dts = times[i] * 1000;
+ xv->validate_count = i + 1;
+ }
+ xv->keyframe_times = times;
+ xv->keyframe_filepositions = filepositions;
+ xv->keyframe_count = timeslen;
+ times = NULL;
+ filepositions = NULL;
+ } else {
+invalid:
+ av_log(s, AV_LOG_WARNING, "Invalid keyframes object, skipping.\n");
+ }
+
+finish:
+ av_freep(×);
+ av_freep(&filepositions);
+ avio_seek(ioc, initial_pos, SEEK_SET);
+ return ret;
+}
+
+static int amf_parse_object(AVFormatContext *s, AVStream *astream,
+ AVStream *vstream, const char *key,
+ int64_t max_pos, int depth)
+{
+ AVCodecParameters *apar, *vpar;
+ XVContext *xv = s->priv_data;
+ AVIOContext *ioc;
+ AMFDataType amf_type;
+ char str_val[1024];
+ double num_val;
+ int rot;
+ if(xv->rot_value){
+ rot = xv->rot_value;
+ }
+ else{
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+
+ num_val = 0;
+ ioc = s->pb;
+ amf_type = xvio_r8(ioc, rot);
+
+ switch (amf_type) {
+ case AMF_DATA_TYPE_NUMBER:
+ num_val = av_int2double(xvio_rb64(ioc, rot));
+ break;
+ case AMF_DATA_TYPE_BOOL:
+ num_val = xvio_r8(ioc, rot);
+ break;
+ case AMF_DATA_TYPE_STRING:
+ if (amf_get_string(ioc, str_val, sizeof(str_val), rot) < 0) {
+ av_log(s, AV_LOG_ERROR, "AMF_DATA_TYPE_STRING parsing failed\n");
+ return -1;
+ }
+ break;
+ case AMF_DATA_TYPE_OBJECT:
+ if (key &&
+ (ioc->seekable & AVIO_SEEKABLE_NORMAL) &&
+ !strcmp(KEYFRAMES_TAG, key) && depth == 1)
+ if (parse_keyframes_index(s, ioc,
+ max_pos) < 0)
+ av_log(s, AV_LOG_ERROR, "Keyframe index parsing failed\n");
+ else
+ add_keyframes_index(s);
+ while (avio_tell(ioc) < max_pos - 2 &&
+ amf_get_string(ioc, str_val, sizeof(str_val), rot) > 0)
+ if (amf_parse_object(s, astream, vstream, str_val, max_pos,
+ depth + 1) < 0)
+ return -1; // if we couldn't skip, bomb out.
+ if (xvio_r8(ioc, rot) != AMF_END_OF_OBJECT) {
+ av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_OBJECT\n");
+ return -1;
+ }
+ break;
+ case AMF_DATA_TYPE_NULL:
+ case AMF_DATA_TYPE_UNDEFINED:
+ case AMF_DATA_TYPE_UNSUPPORTED:
+ break; // these take up no additional space
+ case AMF_DATA_TYPE_MIXEDARRAY:
+ {
+ unsigned v;
+ avio_skip(ioc, 4); // skip 32-bit max array index
+ while (avio_tell(ioc) < max_pos - 2 &&
+ amf_get_string(ioc, str_val, sizeof(str_val), rot) > 0)
+ // this is the only case in which we would want a nested
+ // parse to not skip over the object
+ if (amf_parse_object(s, astream, vstream, str_val, max_pos,
+ depth + 1) < 0)
+ return -1;
+ v = xvio_r8(ioc, rot);
+ if (v != AMF_END_OF_OBJECT) {
+ av_log(s, AV_LOG_ERROR, "Missing AMF_END_OF_OBJECT in AMF_DATA_TYPE_MIXEDARRAY, found %d\n", v);
+ return -1;
+ }
+ break;
+ }
+ case AMF_DATA_TYPE_ARRAY:
+ {
+ unsigned int arraylen, i;
+
+ arraylen = xvio_rb32(ioc, rot);
+ for (i = 0; i < arraylen && avio_tell(ioc) < max_pos - 1; i++)
+ if (amf_parse_object(s, NULL, NULL, NULL, max_pos,
+ depth + 1) < 0)
+ return -1; // if we couldn't skip, bomb out.
+ }
+ break;
+ case AMF_DATA_TYPE_DATE:
+ avio_skip(ioc, 8 + 2); // timestamp (double) and UTC offset (int16)
+ break;
+ default: // unsupported type, we couldn't skip
+ av_log(s, AV_LOG_ERROR, "unsupported amf type %d\n", amf_type);
+ return -1;
+ }
+
+ if (key) {
+ apar = astream ? astream->codecpar : NULL;
+ vpar = vstream ? vstream->codecpar : NULL;
+
+ // stream info doesn't live any deeper than the first object
+ if (depth == 1) {
+ if (amf_type == AMF_DATA_TYPE_NUMBER ||
+ amf_type == AMF_DATA_TYPE_BOOL) {
+ if (!strcmp(key, "duration"))
+ s->duration = num_val * AV_TIME_BASE;
+ else if (!strcmp(key, "videodatarate") &&
+ 0 <= (int)(num_val * 1024.0))
+ xv->video_bit_rate = num_val * 1024.0;
+ else if (!strcmp(key, "audiodatarate") &&
+ 0 <= (int)(num_val * 1024.0))
+ xv->audio_bit_rate = num_val * 1024.0;
+ else if (!strcmp(key, "datastream")) {
+ AVStream *st = create_stream(s, AVMEDIA_TYPE_SUBTITLE);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codecpar->codec_id = AV_CODEC_ID_TEXT;
+ } else if (!strcmp(key, "framerate")) {
+ xv->framerate = av_d2q(num_val, 1000);
+ if (vstream)
+ vstream->avg_frame_rate = xv->framerate;
+ } else if (xv->trust_metadata) {
+ if (!strcmp(key, "videocodecid") && vpar) {
+ int ret = xv_set_video_codec(s, vstream, num_val, 0);
+ if (ret < 0)
+ return ret;
+ } else if (!strcmp(key, "audiocodecid") && apar) {
+ int id = ((int)num_val) << FLV_AUDIO_CODECID_OFFSET;
+ xv_set_audio_codec(s, astream, apar, id);
+ } else if (!strcmp(key, "audiosamplerate") && apar) {
+ apar->sample_rate = num_val;
+ } else if (!strcmp(key, "audiosamplesize") && apar) {
+ apar->bits_per_coded_sample = num_val;
+ } else if (!strcmp(key, "stereo") && apar) {
+ apar->channels = num_val + 1;
+ apar->channel_layout = apar->channels == 2 ?
+ AV_CH_LAYOUT_STEREO :
+ AV_CH_LAYOUT_MONO;
+ } else if (!strcmp(key, "width") && vpar) {
+ vpar->width = num_val;
+ } else if (!strcmp(key, "height") && vpar) {
+ vpar->height = num_val;
+ }
+ }
+ }
+ if (amf_type == AMF_DATA_TYPE_STRING) {
+ if (!strcmp(key, "encoder")) {
+ int version = -1;
+ if (1 == sscanf(str_val, "Open Broadcaster Software v0.%d", &version)) {
+ if (version > 0 && version <= 655)
+ xv->broken_sizes = 1;
+ }
+ } else if (!strcmp(key, "metadatacreator")) {
+ if ( !strcmp (str_val, "MEGA")
+ || !strncmp(str_val, "FlixEngine", 10))
+ xv->broken_sizes = 1;
+ }
+ }
+ }
+
+ if (amf_type == AMF_DATA_TYPE_OBJECT && s->nb_streams == 1 &&
+ ((!apar && !strcmp(key, "audiocodecid")) ||
+ (!vpar && !strcmp(key, "videocodecid"))))
+ s->ctx_flags &= ~AVFMTCTX_NOHEADER; //If there is either audio/video missing, codecid will be an empty object
+
+ if ((!strcmp(key, "duration") ||
+ !strcmp(key, "filesize") ||
+ !strcmp(key, "width") ||
+ !strcmp(key, "height") ||
+ !strcmp(key, "videodatarate") ||
+ !strcmp(key, "framerate") ||
+ !strcmp(key, "videocodecid") ||
+ !strcmp(key, "audiodatarate") ||
+ !strcmp(key, "audiosamplerate") ||
+ !strcmp(key, "audiosamplesize") ||
+ !strcmp(key, "stereo") ||
+ !strcmp(key, "audiocodecid") ||
+ !strcmp(key, "datastream")) && !xv->dump_full_metadata)
+ return 0;
+
+ s->event_flags |= AVFMT_EVENT_FLAG_METADATA_UPDATED;
+ if (amf_type == AMF_DATA_TYPE_BOOL) {
+ av_strlcpy(str_val, num_val > 0 ? "true" : "false",
+ sizeof(str_val));
+ av_dict_set(&s->metadata, key, str_val, 0);
+ } else if (amf_type == AMF_DATA_TYPE_NUMBER) {
+ snprintf(str_val, sizeof(str_val), "%.f", num_val);
+ av_dict_set(&s->metadata, key, str_val, 0);
+ } else if (amf_type == AMF_DATA_TYPE_STRING)
+ av_dict_set(&s->metadata, key, str_val, 0);
+ }
+
+ return 0;
+}
+
+#define TYPE_ONTEXTDATA 1
+#define TYPE_ONCAPTION 2
+#define TYPE_ONCAPTIONINFO 3
+#define TYPE_UNKNOWN 9
+
+static int xv_read_metabody(AVFormatContext *s, int64_t next_pos)
+{
+ XVContext *xv = s->priv_data;
+ AMFDataType type;
+ AVStream *stream, *astream, *vstream;
+ AVStream av_unused *dstream;
+ AVIOContext *ioc;
+ int i;
+ char buffer[32];
+ int rot;
+ if(xv->rot_value){
+ rot = xv->rot_value;
+ }
+ else{
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+
+ astream = NULL;
+ vstream = NULL;
+ dstream = NULL;
+ ioc = s->pb;
+
+ // first object needs to be "onMetaData" string
+ type = xvio_r8(ioc, rot);
+ if (type != AMF_DATA_TYPE_STRING ||
+ amf_get_string(ioc, buffer, sizeof(buffer), rot) < 0)
+ return TYPE_UNKNOWN;
+
+ if (!strcmp(buffer, "onTextData"))
+ return TYPE_ONTEXTDATA;
+
+ if (!strcmp(buffer, "onCaption"))
+ return TYPE_ONCAPTION;
+
+ if (!strcmp(buffer, "onCaptionInfo"))
+ return TYPE_ONCAPTIONINFO;
+
+ if (strcmp(buffer, "onMetaData") && strcmp(buffer, "onCuePoint")) {
+ av_log(s, AV_LOG_DEBUG, "Unknown type %s\n", buffer);
+ return TYPE_UNKNOWN;
+ }
+
+ // find the streams now so that amf_parse_object doesn't need to do
+ // the lookup every time it is called.
+ for (i = 0; i < s->nb_streams; i++) {
+ stream = s->streams[i];
+ if (stream->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
+ vstream = stream;
+ xv->last_keyframe_stream_index = i;
+ } else if (stream->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
+ astream = stream;
+ if (xv->last_keyframe_stream_index == -1)
+ xv->last_keyframe_stream_index = i;
+ }
+ else if (stream->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
+ dstream = stream;
+ }
+
+ // parse the second object (we want a mixed array)
+ if (amf_parse_object(s, astream, vstream, buffer, next_pos, 0) < 0)
+ return -1;
+
+ return 0;
+}
+
+
+
+static int xv_read_header(AVFormatContext *s)
+{
+ int flags;
+ XVContext *xv = s->priv_data;
+ int offset;
+ int pre_tag_size = 0;
+ int rot;
+ if(!xv->rot_value){
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+ else{
+ rot = xv->rot_value;
+ }
+ avio_seek(s->pb, 0x200004, SEEK_SET);
+ flags = xvio_r8(s->pb, rot);
+
+ xv->missing_streams = flags & (FLV_HEADER_FLAG_HASVIDEO | FLV_HEADER_FLAG_HASAUDIO);
+
+ s->ctx_flags |= AVFMTCTX_NOHEADER;
+
+ offset = xvio_rb32(s->pb, rot) + 0x200000;
+
+ avio_seek(s->pb, offset, SEEK_SET);
+
+ /* Annex E. The FLV File Format
+ * E.3 TheFLVFileBody
+ * Field Type Comment
+ * PreviousTagSize0 UI32 Always 0
+ * */
+ pre_tag_size = xvio_rb32(s->pb, rot);
+ if (pre_tag_size) {
+ av_log(s, AV_LOG_WARNING, "Read FLV header error, input file is not a standard xv format, first PreviousTagSize0 always is 0\n");
+ }
+
+ s->start_time = 0;
+ xv->sum_flv_tag_size = 0;
+ xv->last_keyframe_stream_index = -1;
+
+ return 0;
+}
+
+static int xv_read_close(AVFormatContext *s)
+{
+ int i;
+ XVContext *xv = s->priv_data;
+ for (i=0; i<FLV_STREAM_TYPE_NB; i++)
+ av_freep(&xv->new_extradata[i]);
+ av_freep(&xv->keyframe_times);
+ av_freep(&xv->keyframe_filepositions);
+ return 0;
+}
+
+static int xv_get_extradata(AVFormatContext *s, AVStream *st, int size)
+{
+ if (!size)
+ return 0;
+
+ av_freep(&st->codecpar->extradata);
+ if (ff_get_extradata(s, st->codecpar, s->pb, size) < 0)
+ return AVERROR(ENOMEM);
+ st->internal->need_context_update = 1;
+ return 0;
+}
+
+static int xv_queue_extradata(XVContext *xv, AVIOContext *pb, int stream,
+ int size)
+{
+ if (!size)
+ return 0;
+
+ av_free(xv->new_extradata[stream]);
+ xv->new_extradata[stream] = av_mallocz(size +
+ AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!xv->new_extradata[stream])
+ return AVERROR(ENOMEM);
+ xv->new_extradata_size[stream] = size;
+ avio_read(pb, xv->new_extradata[stream], size);
+ return 0;
+}
+
+static void clear_index_entries(AVFormatContext *s, int64_t pos)
+{
+ int i, j, out;
+ av_log(s, AV_LOG_WARNING,
+ "Found invalid index entries, clearing the index.\n");
+ for (i = 0; i < s->nb_streams; i++) {
+ AVStream *st = s->streams[i];
+ /* Remove all index entries that point to >= pos */
+ out = 0;
+ for (j = 0; j < st->nb_index_entries; j++)
+ if (st->index_entries[j].pos < pos)
+ st->index_entries[out++] = st->index_entries[j];
+ st->nb_index_entries = out;
+ }
+}
+
+static int amf_skip_tag(AVIOContext *pb, AMFDataType type)
+{
+ int nb = -1, ret, parse_name = 1;
+
+ switch (type) {
+ case AMF_DATA_TYPE_NUMBER:
+ avio_skip(pb, 8);
+ break;
+ case AMF_DATA_TYPE_BOOL:
+ avio_skip(pb, 1);
+ break;
+ case AMF_DATA_TYPE_STRING:
+ avio_skip(pb, avio_rb16(pb));
+ break;
+ case AMF_DATA_TYPE_ARRAY:
+ parse_name = 0;
+ case AMF_DATA_TYPE_MIXEDARRAY:
+ nb = avio_rb32(pb);
+ case AMF_DATA_TYPE_OBJECT:
+ while(!pb->eof_reached && (nb-- > 0 || type != AMF_DATA_TYPE_ARRAY)) {
+ if (parse_name) {
+ int size = avio_rb16(pb);
+ if (!size) {
+ avio_skip(pb, 1);
+ break;
+ }
+ avio_skip(pb, size);
+ }
+ if ((ret = amf_skip_tag(pb, avio_r8(pb))) < 0)
+ return ret;
+ }
+ break;
+ case AMF_DATA_TYPE_NULL:
+ case AMF_DATA_TYPE_OBJECT_END:
+ break;
+ default:
+ return AVERROR_INVALIDDATA;
+ }
+ return 0;
+}
+
+static int xv_data_packet(AVFormatContext *s, AVPacket *pkt,
+ int64_t dts, int64_t next)
+{
+ AVIOContext *pb = s->pb;
+ XVContext *xv = s->priv_data;
+ AVStream *st = NULL;
+ char buf[20];
+ int ret = AVERROR_INVALIDDATA;
+ int i, length = -1;
+ int array = 0;
+ int rot;
+ if(xv->rot_value){
+ rot = xv->rot_value;
+ }
+ else{
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+
+ switch (xvio_r8(pb,rot)) {
+ case AMF_DATA_TYPE_ARRAY:
+ array = 1;
+ case AMF_DATA_TYPE_MIXEDARRAY:
+ avio_seek(pb, 4, SEEK_CUR);
+ case AMF_DATA_TYPE_OBJECT:
+ break;
+ default:
+ goto skip;
+ }
+
+ while (array || (ret = amf_get_string(pb, buf, sizeof(buf), rot)) > 0) {
+ AMFDataType type = xvio_r8(pb,rot);
+ if (type == AMF_DATA_TYPE_STRING && (array || !strcmp(buf, "text"))) {
+ length = xvio_rb16(pb, rot);
+ ret = av_get_packet(pb, pkt, length);
+ if (ret < 0)
+ goto skip;
+ else
+ break;
+ } else {
+ if ((ret = amf_skip_tag(pb, type)) < 0)
+ goto skip;
+ }
+ }
+
+ if (length < 0) {
+ ret = AVERROR_INVALIDDATA;
+ goto skip;
+ }
+
+ for (i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
+ break;
+ }
+
+ if (i == s->nb_streams) {
+ st = create_stream(s, AVMEDIA_TYPE_SUBTITLE);
+ if (!st)
+ return AVERROR(ENOMEM);
+ st->codecpar->codec_id = AV_CODEC_ID_TEXT;
+ }
+
+ pkt->dts = dts;
+ pkt->pts = dts;
+ pkt->size = ret;
+
+ pkt->stream_index = st->index;
+ pkt->flags |= AV_PKT_FLAG_KEY;
+
+skip:
+ avio_seek(s->pb, next + 4, SEEK_SET);
+
+ return ret;
+}
+
+static int resync(AVFormatContext *s)
+{
+ XVContext *xv = s->priv_data;
+ int64_t i;
+ int64_t pos = avio_tell(s->pb);
+ int rot;
+ if(xv->rot_value){
+ rot = xv->rot_value;
+ }
+ else{
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+
+ for (i=0; !avio_feof(s->pb); i++) {
+ int j = i & (RESYNC_BUFFER_SIZE-1);
+ int j1 = j + RESYNC_BUFFER_SIZE;
+ xv->resync_buffer[j ] =
+ xv->resync_buffer[j1] = xvio_r8(s->pb,rot);
+
+ if (i >= 8 && pos) {
+ uint8_t *d = xv->resync_buffer + j1 - 8;
+ if (d[0] == 'F' &&
+ d[1] == 'L' &&
+ d[2] == 'V' &&
+ d[3] < 5 && d[5] == 0) {
+ av_log(s, AV_LOG_WARNING, "Concatenated FLV detected, might fail to demux, decode and seek %"PRId64"\n", xv->last_ts);
+ xv->time_offset = xv->last_ts + 1;
+ xv->time_pos = avio_tell(s->pb);
+ }
+ }
+
+ if (i > 22) {
+ unsigned lsize2 = AV_RB32(xv->resync_buffer + j1 - 4);
+ if (lsize2 >= 11 && lsize2 + 8LL < FFMIN(i, RESYNC_BUFFER_SIZE)) {
+ unsigned size2 = AV_RB24(xv->resync_buffer + j1 - lsize2 + 1 - 4);
+ unsigned lsize1 = AV_RB32(xv->resync_buffer + j1 - lsize2 - 8);
+ if (lsize1 >= 11 && lsize1 + 8LL + lsize2 < FFMIN(i, RESYNC_BUFFER_SIZE)) {
+ unsigned size1 = AV_RB24(xv->resync_buffer + j1 - lsize1 + 1 - lsize2 - 8);
+ if (size1 == lsize1 - 11 && size2 == lsize2 - 11) {
+ avio_seek(s->pb, pos + i - lsize1 - lsize2 - 8, SEEK_SET);
+ return 1;
+ }
+ }
+ }
+ }
+ }
+ return AVERROR_EOF;
+}
+
+static int xv_read_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ XVContext *xv = s->priv_data;
+ int ret, i, size, flags;
+ enum FlvTagType type;
+ int stream_type=-1;
+ int64_t next, pos, meta_pos;
+ int64_t dts, pts = AV_NOPTS_VALUE;
+ int av_uninit(channels);
+ int av_uninit(sample_rate);
+ AVStream *st = NULL;
+ int last = -1;
+ int orig_size;
+ int rot;
+ if(xv->rot_value){
+ rot=xv->rot_value;
+ }
+ else{
+ rot = find_rot(s->pb);
+ xv->rot_value = rot;
+ }
+
+retry:
+ /* pkt size is repeated at end. skip it */
+ pos = avio_tell(s->pb);
+ type = (xvio_r8(s->pb, rot) & 0x1F);
+ orig_size =
+ size = xvio_rb24(s->pb, rot);
+ xv->sum_flv_tag_size += size + 11;
+ dts = xvio_rb24(s->pb, rot);
+ dts |= (unsigned)xvio_r8(s->pb, rot) << 24;
+ av_log(s, AV_LOG_TRACE, "type:%d, size:%d, last:%d, dts:%"PRId64" pos:%"PRId64"\n", type, size, last, dts, avio_tell(s->pb));
+ if (avio_feof(s->pb))
+ return AVERROR_EOF;
+ avio_skip(s->pb, 3); /* stream id, always 0 */
+ flags = 0;
+
+ if (xv->validate_next < xv->validate_count) {
+ int64_t validate_pos = xv->validate_index[xv->validate_next].pos;
+ if (pos == validate_pos) {
+ if (FFABS(dts - xv->validate_index[xv->validate_next].dts) <=
+ VALIDATE_INDEX_TS_THRESH) {
+ xv->validate_next++;
+ } else {
+ clear_index_entries(s, validate_pos);
+ xv->validate_count = 0;
+ }
+ } else if (pos > validate_pos) {
+ clear_index_entries(s, validate_pos);
+ xv->validate_count = 0;
+ }
+ }
+
+ if (size == 0) {
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+
+ next = size + avio_tell(s->pb);
+
+ if (type == FLV_TAG_TYPE_AUDIO) {
+ stream_type = FLV_STREAM_TYPE_AUDIO;
+ flags = xvio_r8(s->pb, rot);
+ size--;
+ } else if (type == FLV_TAG_TYPE_VIDEO) {
+ stream_type = FLV_STREAM_TYPE_VIDEO;
+ flags = xvio_r8(s->pb, rot);
+ size--;
+ if ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_VIDEO_INFO_CMD)
+ goto skip;
+ } else if (type == FLV_TAG_TYPE_META) {
+ stream_type=FLV_STREAM_TYPE_SUBTITLE;
+ if (size > 13 + 1 + 4) { // Header-type metadata stuff
+ int type;
+ meta_pos = avio_tell(s->pb);
+ type = xv_read_metabody(s, next);
+ if (type == 0 && dts == 0 || type < 0) {
+ if (type < 0 && xv->validate_count &&
+ xv->validate_index[0].pos > next &&
+ xv->validate_index[0].pos - 4 < next
+ ) {
+ av_log(s, AV_LOG_WARNING, "Adjusting next position due to index mismatch\n");
+ next = xv->validate_index[0].pos - 4;
+ }
+ goto skip;
+ } else if (type == TYPE_ONTEXTDATA) {
+ avpriv_request_sample(s, "OnTextData packet");
+ return xv_data_packet(s, pkt, dts, next);
+ } else if (type == TYPE_ONCAPTION) {
+ return xv_data_packet(s, pkt, dts, next);
+ } else if (type == TYPE_UNKNOWN) {
+ stream_type = FLV_STREAM_TYPE_DATA;
+ }
+ avio_seek(s->pb, meta_pos, SEEK_SET);
+ }
+ } else {
+ av_log(s, AV_LOG_DEBUG,
+ "Skipping xv packet: type %d, size %d, flags %d.\n",
+ type, size, flags);
+skip:
+ if (avio_seek(s->pb, next, SEEK_SET) != next) {
+ // This can happen if xv_read_metabody above read past
+ // next, on a non-seekable input, and the preceding data has
+ // been flushed out from the IO buffer.
+ av_log(s, AV_LOG_ERROR, "Unable to seek to the next packet\n");
+ return AVERROR_INVALIDDATA;
+ }
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+
+ /* skip empty data packets */
+ if (!size) {
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+
+ /* now find stream */
+ for (i = 0; i < s->nb_streams; i++) {
+ st = s->streams[i];
+ if (stream_type == FLV_STREAM_TYPE_AUDIO) {
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
+ (s->audio_codec_id || flv_same_audio_codec(st->codecpar, flags)))
+ break;
+ } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
+ (s->video_codec_id || flv_same_video_codec(st->codecpar, flags)))
+ break;
+ } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
+ break;
+ } else if (stream_type == FLV_STREAM_TYPE_DATA) {
+ if (st->codecpar->codec_type == AVMEDIA_TYPE_DATA)
+ break;
+ }
+ }
+ if (i == s->nb_streams) {
+ static const enum AVMediaType stream_types[] = {AVMEDIA_TYPE_VIDEO, AVMEDIA_TYPE_AUDIO, AVMEDIA_TYPE_SUBTITLE, AVMEDIA_TYPE_DATA};
+ st = create_stream(s, stream_types[stream_type]);
+ if (!st)
+ return AVERROR(ENOMEM);
+
+ }
+ av_log(s, AV_LOG_TRACE, "%d %X %d \n", stream_type, flags, st->discard);
+
+ if (xv->time_pos <= pos) {
+ dts += xv->time_offset;
+ }
+
+ if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
+ ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY ||
+ stream_type == FLV_STREAM_TYPE_AUDIO))
+ av_add_index_entry(st, pos, dts, size, 0, AVINDEX_KEYFRAME);
+
+ if ( (st->discard >= AVDISCARD_NONKEY && !((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY || (stream_type == FLV_STREAM_TYPE_AUDIO)))
+ ||(st->discard >= AVDISCARD_BIDIR && ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_DISP_INTER && (stream_type == FLV_STREAM_TYPE_VIDEO)))
+ || st->discard >= AVDISCARD_ALL
+ ) {
+ avio_seek(s->pb, next, SEEK_SET);
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+
+ // if not streamed and no duration from metadata then seek to end to find
+ // the duration from the timestamps
+ if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) &&
+ (!s->duration || s->duration == AV_NOPTS_VALUE) &&
+ !xv->searched_for_end) {
+ int size;
+ const int64_t pos = avio_tell(s->pb);
+ // Read the last 4 bytes of the file, this should be the size of the
+ // previous FLV tag. Use the timestamp of its payload as duration.
+ int64_t fsize = avio_size(s->pb);
+retry_duration:
+ avio_seek(s->pb, fsize - 4, SEEK_SET);
+ size = xvio_rb32(s->pb, rot);
+ if (size > 0 && size < fsize) {
+ // Seek to the start of the last FLV tag at position (fsize - 4 - size)
+ // but skip the byte indicating the type.
+ avio_seek(s->pb, fsize - 3 - size, SEEK_SET);
+ if (size == xvio_rb24(s->pb, rot) + 11) {
+ uint32_t ts = xvio_rb24(s->pb, rot);
+ ts |= xvio_r8(s->pb, rot) << 24;
+ if (ts)
+ s->duration = ts * (int64_t)AV_TIME_BASE / 1000;
+ else if (fsize >= 8 && fsize - 8 >= size) {
+ fsize -= size+4;
+ goto retry_duration;
+ }
+ }
+ }
+
+ avio_seek(s->pb, pos, SEEK_SET);
+ xv->searched_for_end = 1;
+ }
+
+ if (stream_type == FLV_STREAM_TYPE_AUDIO) {
+ int bits_per_coded_sample;
+ channels = (flags & FLV_AUDIO_CHANNEL_MASK) == FLV_STEREO ? 2 : 1;
+ sample_rate = 44100 << ((flags & FLV_AUDIO_SAMPLERATE_MASK) >>
+ FLV_AUDIO_SAMPLERATE_OFFSET) >> 3;
+ bits_per_coded_sample = (flags & FLV_AUDIO_SAMPLESIZE_MASK) ? 16 : 8;
+ if (!st->codecpar->channels || !st->codecpar->sample_rate ||
+ !st->codecpar->bits_per_coded_sample) {
+ st->codecpar->channels = channels;
+ st->codecpar->channel_layout = channels == 1
+ ? AV_CH_LAYOUT_MONO
+ : AV_CH_LAYOUT_STEREO;
+ st->codecpar->sample_rate = sample_rate;
+ st->codecpar->bits_per_coded_sample = bits_per_coded_sample;
+ }
+ if (!st->codecpar->codec_id) {
+ xv_set_audio_codec(s, st, st->codecpar,
+ flags & FLV_AUDIO_CODECID_MASK);
+ xv->last_sample_rate =
+ sample_rate = st->codecpar->sample_rate;
+ xv->last_channels =
+ channels = st->codecpar->channels;
+ } else {
+ AVCodecParameters *par = avcodec_parameters_alloc();
+ if (!par) {
+ ret = AVERROR(ENOMEM);
+ goto leave;
+ }
+ par->sample_rate = sample_rate;
+ par->bits_per_coded_sample = bits_per_coded_sample;
+ xv_set_audio_codec(s, st, par, flags & FLV_AUDIO_CODECID_MASK);
+ sample_rate = par->sample_rate;
+ avcodec_parameters_free(&par);
+ }
+ } else if (stream_type == FLV_STREAM_TYPE_VIDEO) {
+ int ret = xv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK, 1);
+ if (ret < 0)
+ return ret;
+ size -= ret;
+ } else if (stream_type == FLV_STREAM_TYPE_SUBTITLE) {
+ st->codecpar->codec_id = AV_CODEC_ID_TEXT;
+ } else if (stream_type == FLV_STREAM_TYPE_DATA) {
+ st->codecpar->codec_id = AV_CODEC_ID_NONE; // Opaque AMF data
+ }
+
+ if (st->codecpar->codec_id == AV_CODEC_ID_AAC ||
+ st->codecpar->codec_id == AV_CODEC_ID_H264 ||
+ st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
+ int type = xvio_r8(s->pb, rot);
+ size--;
+
+ if (size < 0) {
+ ret = AVERROR_INVALIDDATA;
+ goto leave;
+ }
+
+ if (st->codecpar->codec_id == AV_CODEC_ID_H264 || st->codecpar->codec_id == AV_CODEC_ID_MPEG4) {
+ // sign extension
+ int32_t cts = (xvio_rb24(s->pb, rot) + 0xff800000) ^ 0xff800000;
+ pts = dts + cts;
+ if (cts < 0) { // dts might be wrong
+ if (!xv->wrong_dts)
+ av_log(s, AV_LOG_WARNING,
+ "Negative cts, previous timestamps might be wrong.\n");
+ xv->wrong_dts = 1;
+ } else if (FFABS(dts - pts) > 1000*60*15) {
+ av_log(s, AV_LOG_WARNING,
+ "invalid timestamps %"PRId64" %"PRId64"\n", dts, pts);
+ dts = pts = AV_NOPTS_VALUE;
+ }
+ }
+ if (type == 0 && (!st->codecpar->extradata || st->codecpar->codec_id == AV_CODEC_ID_AAC ||
+ st->codecpar->codec_id == AV_CODEC_ID_H264)) {
+ AVDictionaryEntry *t;
+
+ if (st->codecpar->extradata) {
+ if ((ret = xv_queue_extradata(xv, s->pb, stream_type, size)) < 0)
+ return ret;
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+ if ((ret = xv_get_extradata(s, st, size)) < 0)
+ return ret;
+
+ /* Workaround for buggy Omnia A/XE encoder */
+ t = av_dict_get(s->metadata, "Encoder", NULL, 0);
+ if (st->codecpar->codec_id == AV_CODEC_ID_AAC && t && !strcmp(t->value, "Omnia A/XE"))
+ st->codecpar->extradata_size = 2;
+
+ if (st->codecpar->codec_id == AV_CODEC_ID_AAC && 0) {
+ MPEG4AudioConfig cfg;
+
+ if (avpriv_mpeg4audio_get_config(&cfg, st->codecpar->extradata,
+ st->codecpar->extradata_size * 8, 1) >= 0) {
+ st->codecpar->channels = cfg.channels;
+ st->codecpar->channel_layout = 0;
+ if (cfg.ext_sample_rate)
+ st->codecpar->sample_rate = cfg.ext_sample_rate;
+ else
+ st->codecpar->sample_rate = cfg.sample_rate;
+ av_log(s, AV_LOG_TRACE, "mp4a config channels %d sample rate %d\n",
+ st->codecpar->channels, st->codecpar->sample_rate);
+ }
+ }
+
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+ }
+
+ /* skip empty data packets */
+ if (!size) {
+ ret = FFERROR_REDO;
+ goto leave;
+ }
+
+ ret = av_get_packet(s->pb, pkt, size);
+ if (ret < 0)
+ return ret;
+ pkt->dts = dts;
+ pkt->pts = pts == AV_NOPTS_VALUE ? dts : pts;
+ pkt->stream_index = st->index;
+ pkt->pos = pos;
+ if (xv->new_extradata[stream_type]) {
+ uint8_t *side = av_packet_new_side_data(pkt, AV_PKT_DATA_NEW_EXTRADATA,
+ xv->new_extradata_size[stream_type]);
+ if (side) {
+ memcpy(side, xv->new_extradata[stream_type],
+ xv->new_extradata_size[stream_type]);
+ av_freep(&xv->new_extradata[stream_type]);
+ xv->new_extradata_size[stream_type] = 0;
+ }
+ }
+ if (stream_type == FLV_STREAM_TYPE_AUDIO &&
+ (sample_rate != xv->last_sample_rate ||
+ channels != xv->last_channels)) {
+ xv->last_sample_rate = sample_rate;
+ xv->last_channels = channels;
+ ff_add_param_change(pkt, channels, 0, sample_rate, 0, 0);
+ }
+
+ if ( stream_type == FLV_STREAM_TYPE_AUDIO ||
+ ((flags & FLV_VIDEO_FRAMETYPE_MASK) == FLV_FRAME_KEY) ||
+ stream_type == FLV_STREAM_TYPE_SUBTITLE ||
+ stream_type == FLV_STREAM_TYPE_DATA)
+ pkt->flags |= AV_PKT_FLAG_KEY;
+
+leave:
+ last = xvio_rb32(s->pb, rot);
+ if (!xv->trust_datasize) {
+ if (last != orig_size + 11 && last != orig_size + 10 &&
+ !avio_feof(s->pb) &&
+ (last != orig_size || !last) && last != xv->sum_flv_tag_size &&
+ !xv->broken_sizes) {
+ av_log(s, AV_LOG_ERROR, "Packet mismatch %d %d %d\n", last, orig_size + 11, xv->sum_flv_tag_size);
+ avio_seek(s->pb, pos + 1, SEEK_SET);
+ ret = resync(s);
+ av_packet_unref(pkt);
+ if (ret >= 0) {
+ goto retry;
+ }
+ }
+ }
+
+ if (ret >= 0)
+ xv->last_ts = pkt->dts;
+
+ return ret;
+}
+
+static int xv_read_seek(AVFormatContext *s, int stream_index,
+ int64_t ts, int flags)
+{
+ XVContext *xv = s->priv_data;
+ xv->validate_count = 0;
+ return avio_seek_time(s->pb, stream_index, ts, flags);
+}
+
+#define OFFSET(x) offsetof(XVContext, x)
+#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+static const AVOption options[] = {
+ { "flv_metadata", "Allocate streams according to the onMetaData array", OFFSET(trust_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
+ { "flv_full_metadata", "Dump full metadata of the onMetadata", OFFSET(dump_full_metadata), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
+ { "flv_ignore_prevtag", "Ignore the Size of previous tag", OFFSET(trust_datasize), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VD },
+ { "missing_streams", "", OFFSET(missing_streams), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 0xFF, VD | AV_OPT_FLAG_EXPORT | AV_OPT_FLAG_READONLY },
+ { NULL }
+};
+
+static const AVClass xv_class = {
+ .class_name = "xvdec",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+AVInputFormat ff_xv_demuxer = {
+ .name = "xv",
+ .long_name = NULL_IF_CONFIG_SMALL("Xunlei Video File"),
+ .priv_data_size = sizeof(XVContext),
+ .read_probe = xv_probe,
+ .read_header = xv_read_header,
+ .read_packet = xv_read_packet,
+ .read_seek = xv_read_seek,
+ .read_close = xv_read_close,
+ .extensions = "xv",
+ .priv_class = &xv_class,
+};
+
new file mode 100644
@@ -0,0 +1,95 @@
+int flvid = 0x46;
+
+
+int byte_shift(int byte,int shift);
+int find_rot(AVIOContext *pb);
+int xvio_r8(AVIOContext *pb, int rot);
+unsigned int xvio_rb16(AVIOContext *s, int rot);
+unsigned int xvio_rb24(AVIOContext *s, int rot);
+unsigned int xvio_rb32(AVIOContext *s, int rot);
+uint64_t xvio_rb64(AVIOContext *s, int rot);
+int xv_string_decrypt(int64_t curr_pos, char *buffer, int length, int rot);
+
+
+
+int byte_shift(int byte,int shift){
+ return ((byte + shift)&0xff);
+}
+
+
+int find_rot(AVIOContext *pb){
+ int64_t curr_pos = avio_tell(pb);
+ avio_seek(pb,0x200000,SEEK_SET);
+ int rot = flvid - avio_r8(pb);
+ avio_seek(pb,curr_pos, SEEK_SET);
+ return rot;
+}
+
+
+
+int xvio_r8(AVIOContext *pb, int rot){
+ int64_t curr_pos = avio_tell(pb);
+ if(curr_pos < 0x200400){
+ int ret=avio_r8(pb);
+ if(ret == 0)return 0;
+ ret = byte_shift(ret,rot);
+ return ret;
+ }
+ int ret=avio_r8(pb);
+ return ret;
+}
+
+
+unsigned int xvio_rb16(AVIOContext *s, int rot)
+{
+ unsigned int val;
+ val = xvio_r8(s, rot) << 8;
+ val |= xvio_r8(s, rot);
+ return val;
+}
+
+
+unsigned int xvio_rb24(AVIOContext *s, int rot)
+{
+ unsigned int val;
+ val = xvio_rb16(s, rot) << 8;
+ val |= xvio_r8(s, rot);
+ return val;
+}
+
+
+unsigned int xvio_rb32(AVIOContext *s, int rot)
+{
+ unsigned int val;
+ val = xvio_rb16(s, rot) << 16;
+ val |= xvio_rb16(s, rot);
+ return val;
+}
+
+
+uint64_t xvio_rb64(AVIOContext *s, int rot)
+{
+ uint64_t val;
+ val = (uint64_t)xvio_rb32(s, rot) << 32;
+ val |= (uint64_t)xvio_rb32(s, rot);
+ return val;
+}
+
+
+
+int xv_string_decrypt(int64_t curr_pos, char *buffer, int length, int rot){
+ if(curr_pos>=0x200400){
+ return 0;
+ }
+ for(int i=0;i<length;i++){
+ if((curr_pos+i) < 0x200400){
+ buffer[i] = byte_shift(buffer[i],rot);
+ }
+ else{
+ break;
+ }
+ }
+ return 0;
+}
+
+
--
2.21.0