ff_ac3_downmix_c   46 libavcodec/dsputil.c void ff_ac3_downmix_c(float (*samples)[256], float (*matrix)[2], int out_ch, int in_ch, int len);
ff_ac3_downmix_c 4628 libavcodec/dsputil.c     c->ac3_downmix = ff_ac3_downmix_c;