ff_mp4_read_descr_len  206 libavformat/cafdec.c         pos += caf->bytes_per_packet ? caf->bytes_per_packet : ff_mp4_read_descr_len(pb);
ff_mp4_read_descr_len  207 libavformat/cafdec.c         st->duration += caf->frames_per_packet ? caf->frames_per_packet : ff_mp4_read_descr_len(pb);
ff_mp4_read_descr_len  485 libavformat/isom.c     len = ff_mp4_read_descr_len(pb);
ff_mp4_read_descr_len  296 libavformat/isom.h int ff_mp4_read_descr_len(AVIOContext *pb);