GSM_BLOCK_SAMPLES   85 libavformat/gsmdec.c     st->codecpar->bit_rate    = GSM_BLOCK_SIZE * 8 * c->sample_rate / GSM_BLOCK_SAMPLES;
GSM_BLOCK_SAMPLES   87 libavformat/gsmdec.c     avpriv_set_pts_info(st, 64, GSM_BLOCK_SAMPLES, GSM_SAMPLE_RATE);