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aac and h264 in flv demuxing 

Originally committed as revision 13439 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2008-05-26 22:01:41 +00:00
parent f23496b562
commit 04fd3e8134
1 changed files with 32 additions and 0 deletions
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32
libavformat/flvdec.c
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@ -51,6 +51,7 @@ static void flv_set_audio_codec(AVFormatContext *s, AVStream *astream, int flv_c
break;
case FLV_CODECID_PCM_LE:
acodec->codec_id = acodec->bits_per_sample == 8 ? CODEC_ID_PCM_S8 : CODEC_ID_PCM_S16LE; break;
case FLV_CODECID_AAC : acodec->codec_id = CODEC_ID_AAC; break;
case FLV_CODECID_ADPCM: acodec->codec_id = CODEC_ID_ADPCM_SWF; break;
case FLV_CODECID_MP3 : acodec->codec_id = CODEC_ID_MP3 ; astream->need_parsing = AVSTREAM_PARSE_FULL; break;
case FLV_CODECID_NELLYMOSER_8HZ_MONO:
@ -79,6 +80,9 @@ static int flv_set_video_codec(AVFormatContext *s, AVStream *vstream, int flv_co
}
vcodec->extradata[0] = get_byte(s->pb);
return 1; // 1 byte body size adjustment for flv_read_packet()
case FLV_CODECID_H264:
vcodec->codec_id = CODEC_ID_H264;
return 3; // not 4, reading packet type will consume one byte
default:
av_log(s, AV_LOG_INFO, "Unsupported video codec (%x)\n", flv_codecid);
vcodec->codec_tag = flv_codecid;
@ -278,12 +282,24 @@ static int flv_read_header(AVFormatContext *s,
return 0;
}
static int flv_get_extradata(AVFormatContext *s, AVStream *st, int size)
{
av_free(st->codec->extradata);
st->codec->extradata = av_mallocz(size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!st->codec->extradata)
return AVERROR(ENOMEM);
st->codec->extradata_size = size;
get_buffer(s->pb, st->codec->extradata, st->codec->extradata_size);
return 0;
}
static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
{
int ret, i, type, size, flags, is_audio, next, pos;
unsigned dts;
AVStream *st = NULL;
retry:
for(;;){
pos = url_ftell(s->pb);
url_fskip(s->pb, 4); /* size of previous packet */
@ -369,6 +385,22 @@ static int flv_read_packet(AVFormatContext *s, AVPacket *pkt)
size -= flv_set_video_codec(s, st, flags & FLV_VIDEO_CODECID_MASK);
}
if (st->codec->codec_id == CODEC_ID_AAC ||
st->codec->codec_id == CODEC_ID_H264) {
int type = get_byte(s->pb);
size--;
if (st->codec->codec_id == CODEC_ID_H264) {
// cts offset ignored because it might to be signed
// and would cause pts < dts
get_be24(s->pb);
}
if (type == 0) {
if ((ret = flv_get_extradata(s, st, size - 1)) < 0)
return ret;
goto retry;
}
}
ret= av_get_packet(s->pb, pkt, size - 1);
if (ret <= 0) {
return AVERROR(EIO);