static inline void downmix_3f_1r_to_mono(float *samples) { int i; for (i = 0; i < 256; i++) { samples[i] += (samples[i + 256] + samples[i + 512] + samples[i + 768]); samples[i + 256] = samples[i + 512] = samples[i + 768] = 0; } }