BACKSTEP_SIZE 49 libavcodec/mpegaudiodec_template.c #define LAST_BUF_SIZE 2 * BACKSTEP_SIZE + EXTRABYTES BACKSTEP_SIZE 1604 libavcodec/mpegaudiodec_template.c if (i >= 0 && i <= BACKSTEP_SIZE) { BACKSTEP_SIZE 1617 libavcodec/mpegaudiodec_template.c if (i < 0 || i > BACKSTEP_SIZE || nb_frames < 0) { BACKSTEP_SIZE 1620 libavcodec/mpegaudiodec_template.c i = FFMIN(BACKSTEP_SIZE, buf_size - HEADER_SIZE);