diff options
Diffstat (limited to 'libavformat/matroskadec.c')
| -rw-r--r-- | libavformat/matroskadec.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libavformat/matroskadec.c b/libavformat/matroskadec.c index ff2a6c29dc..69a8c7f06e 100644 --- a/libavformat/matroskadec.c +++ b/libavformat/matroskadec.c @@ -1528,6 +1528,19 @@ static int matroska_read_header(AVFormatContext *s) extradata_size = 5; } else extradata_size = 2; + } else if (codec_id == AV_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 + FF_INPUT_BUFFER_PADDING_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 == AV_CODEC_ID_TTA) { extradata_size = 30; extradata = av_mallocz(extradata_size); |