audio_s2u
short2ulaw(short *&F, ulaw *&T) { *T++ = audio_s2u(*F); F++; }
float2ulaw(float *&F, ulaw *&T) { *T++ = audio_s2u(dbl2long(*F++, 32767)); }
double2ulaw(double *&F, ulaw *&T) { *T++ = audio_s2u(dbl2long(*F++, 32767)); }
sp = audio_s2u((sr <= -0x2000)? -0x8000 :
sp = audio_s2u((sr <= -0x2000)? -0x8000 :