ALAC_HEADER       134 libavformat/cafdec.c         if (ff_alloc_extradata(st->codec, ALAC_HEADER))
ALAC_HEADER       142 libavformat/cafdec.c             if (size < ALAC_PREAMBLE + ALAC_HEADER) {
ALAC_HEADER       147 libavformat/cafdec.c             avio_read(pb, st->codec->extradata, ALAC_HEADER);
ALAC_HEADER       148 libavformat/cafdec.c             avio_skip(pb, size - ALAC_PREAMBLE - ALAC_HEADER);