pcm_clamp
v = pcm_clamp(w, AFMT_S32_NE);
v = pcm_clamp(w, AFMT_S32_NE);
v = pcm_clamp(accum, fmt);
pcm_sample_write(dst, pcm_clamp(v, AFMT_##SIGN##BIT##_##ENDIAN),\
pcm_sample_write(dst, pcm_clamp(v, AFMT_##SIGN##BIT##_##ENDIAN),\
return (pcm_clamp(sample, fmt));