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demux_mkv: support svq3 

The most awesome codec, not.

The actual code for svq3 is actually just the part that checks for
MKV_V_QUICKTIME (no other QT-muxed codecs are supported). The rest is
minor refactoring, that actually improves the code in general.

This is just enough to support the 2 svq3-in-mkv sample files I have.
This commit is contained in:
wm4 2014-12-08 18:49:39 +01:00
parent 6a88de05a7
commit e40792c820
1 changed files with 24 additions and 14 deletions
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38
demux/demux_mkv.c
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@ -1176,7 +1176,6 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
{
unsigned char *extradata = NULL;
unsigned int extradata_size = 0;
bool raw = false;
struct sh_stream *sh = new_sh_stream(demuxer, STREAM_VIDEO);
if (!sh)
return 1;
@ -1200,6 +1199,7 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
extradata = track->private_data + 40;
extradata_size = track->private_size - 40;
mp_set_codec_from_tag(sh);
} else {
sh_v->bits_per_coded_sample = 24;
@ -1224,28 +1224,38 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
extradata_size = cnt + 8;
extradata = src - 8;
track->realmedia = 1;
mp_set_codec_from_tag(sh);
} else if (strcmp(track->codec_id, MKV_V_UNCOMPRESSED) == 0) {
// raw video, "like AVI" - this is a FourCC
sh->format = track->colorspace;
raw = true;
sh->codec = "rawvideo";
} else if (strcmp(track->codec_id, MKV_V_QUICKTIME) == 0) {
uint32_t fourcc1 = 0, fourcc2 = 0;
if (track->private_size >= 8) {
fourcc1 = AV_RL32(track->private_data + 0);
fourcc2 = AV_RL32(track->private_data + 4);
}
if (fourcc1 == MP_FOURCC('S', 'V', 'Q', '3') ||
fourcc2 == MP_FOURCC('S', 'V', 'Q', '3'))
{
sh->codec = "svq3";
extradata = track->private_data;
extradata_size = track->private_size;
}
} else {
const videocodec_info_t *vi = vinfo;
while (vi->id && strcmp(vi->id, track->codec_id))
vi++;
sh->format = vi->fourcc;
if (vi->id) {
sh->format = vi->fourcc;
mp_set_codec_from_tag(sh);
}
if (vi->extradata && track->private_data && track->private_size > 0)
{
extradata = track->private_data;
extradata_size = track->private_size;
}
track->parse = vi->parse;
if (!vi->id) {
MP_WARN(demuxer, "Unknown/unsupported "
"CodecID (%s) or missing/bad CodecPrivate\n"
"data (track %u).\n",
track->codec_id, track->tnum);
return 1;
}
}
}
@ -1258,10 +1268,10 @@ static int demux_mkv_open_video(demuxer_t *demuxer, mkv_track_t *track)
sh_v->coded_height = track->v_height;
sh_v->extradata = talloc_memdup(sh_v, extradata, extradata_size);
sh_v->extradata_len = extradata_size;
if (raw) {
sh->codec = "rawvideo";
} else {
mp_set_codec_from_tag(sh);
if (!sh->codec) {
MP_WARN(demuxer, "Unknown/unsupported CodecID (%s) or missing/bad "
"CodecPrivate data (track %u).\n",
track->codec_id, track->tnum);
}
if (track->v_frate == 0.0)
track->v_frate = 25.0;