generic-library/ffmpeg
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Allow demuxing of audio substreams stored as 0x06 type.

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Fixes issue 725: MPEG2 PS with PCM audio.
On behalf of Jai.

Originally committed as revision 17150 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Benoit Fouet 2009-02-11 11:09:36 +00:00
parent 7a10119057
commit 80e58c6153
1 changed files with 23 additions and 2 deletions
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25
libavformat/mpeg.c
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@ -413,12 +413,19 @@ static int mpegps_read_packet(AVFormatContext *s,
enum CodecID codec_id = CODEC_ID_NONE;
enum CodecType type;
int64_t pts, dts, dummy_pos; //dummy_pos is needed for the index building to work
uint8_t dvdaudio_substream_type;
redo:
len = mpegps_read_pes_header(s, &dummy_pos, &startcode, &pts, &dts);
if (len < 0)
return len;
if(startcode == 0x1bd) {
dvdaudio_substream_type = get_byte(s->pb);
url_fskip(s->pb, 3);
len -= 4;
}
/* now find stream */
for(i=0;i<s->nb_streams;i++) {
st = s->streams[i];
@ -427,7 +434,7 @@ static int mpegps_read_packet(AVFormatContext *s,
}
es_type = m->psm_es_type[startcode & 0xff];
if(es_type > 0){
if(es_type > 0 && es_type != STREAM_TYPE_PRIVATE_DATA){
if(es_type == STREAM_TYPE_VIDEO_MPEG1){
codec_id = CODEC_ID_MPEG2VIDEO;
type = CODEC_TYPE_VIDEO;
@ -491,6 +498,19 @@ static int mpegps_read_packet(AVFormatContext *s,
} else if (startcode >= 0xfd55 && startcode <= 0xfd5f) {
type = CODEC_TYPE_VIDEO;
codec_id = CODEC_ID_VC1;
} else if (startcode == 0x1bd) {
// check dvd audio substream type
type = CODEC_TYPE_AUDIO;
switch(dvdaudio_substream_type & 0xe0) {
case 0xa0: codec_id = CODEC_ID_PCM_DVD;
break;
case 0x80: if((dvdaudio_substream_type & 0xf8) == 0x88)
codec_id = CODEC_ID_DTS;
else codec_id = CODEC_ID_AC3;
break;
default: av_log(s, AV_LOG_ERROR, "Unknown 0x1bd sub-stream\n");
goto skip;
}
} else {
skip:
/* skip packet */
@ -508,7 +528,8 @@ static int mpegps_read_packet(AVFormatContext *s,
found:
if(st->discard >= AVDISCARD_ALL)
goto skip;
if (startcode >= 0xa0 && startcode <= 0xaf) {
if ((startcode >= 0xa0 && startcode <= 0xaf) ||
(startcode == 0x1bd && ((dvdaudio_substream_type & 0xe0) == 0xa0))) {
int b1, freq;
/* for LPCM, we just skip the header and consider it is raw