set alac channels from extradata, fix alac mono in m4a

Originally committed as revision 16212 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Baptiste Coudurier 2008-12-18 09:17:19 +00:00
parent efeb298ea0
commit a15328249d

View File

@ -1033,8 +1033,10 @@ static int mov_read_stsd(MOVContext *c, ByteIOContext *pb, MOVAtom atom)
st->codec->block_align = sc->bytes_per_frame;
break;
case CODEC_ID_ALAC:
if (st->codec->extradata_size == 36)
if (st->codec->extradata_size == 36) {
st->codec->frame_size = AV_RB32((st->codec->extradata+12));
st->codec->channels = AV_RB8 (st->codec->extradata+21);
}
break;
default:
break;