FLAC_AVG_FRAME_SIZE  607 libavcodec/flac_parser.c                                               nb_desired * FLAC_AVG_FRAME_SIZE);
FLAC_AVG_FRAME_SIZE  611 libavcodec/flac_parser.c             av_fifo_size(fpc->fifo_buf) / FLAC_AVG_FRAME_SIZE >
FLAC_AVG_FRAME_SIZE  721 libavcodec/flac_parser.c     fpc->fifo_buf = av_fifo_alloc_array(FLAC_MIN_HEADERS + 3, FLAC_AVG_FRAME_SIZE);