diff options
Diffstat (limited to 'libavformat/matroskadec.c')
| -rw-r--r-- | libavformat/matroskadec.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index 2c954afa05..0f1808773b 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -1580,6 +1580,18 @@ static int matroska_read_header(AVFormatContext *s) && (track->codec_priv.data != NULL)) { fourcc = AV_RL32(track->codec_priv.data); codec_id = ff_codec_get_id(ff_codec_movvideo_tags, fourcc); + } else if (codec_id == CODEC_ID_ALAC && track->codec_priv.size) { + /* Only ALAC's magic cookie is stored in Matroska's track headers. + Create the "atom size", "tag", and "tag version" fields the + decoder expects manually. */ + extradata_size = 12 + track->codec_priv.size; + extradata = av_mallocz(extradata_size); + if (extradata == NULL) + return AVERROR(ENOMEM); + AV_WB32(extradata, extradata_size); + memcpy(&extradata[4], "alac", 4); + AV_WB32(&extradata[8], 0); + memcpy(&extradata[12], track->codec_priv.data, track->codec_priv.size); } else if (codec_id == CODEC_ID_PCM_S16BE) { switch (track->audio.bitdepth) { case 8: codec_id = CODEC_ID_PCM_U8; break; |