code.delx.au - pulseaudio/blob - src/tests/voltest.c

   1 #include <stdio.h>
   2
   3 #include <pulse/volume.h>
   4 #include <pulse/gccmacro.h>
   5
   6 int main(int argc, char *argv[]) {
   7     pa_volume_t v;
   8
   9     for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
  10
  11         double dB = pa_sw_volume_to_dB(v);
  12         double f = pa_sw_volume_to_linear(v);
  13
  14         printf("Volume: %3i; percent: %i%%; decibel %0.2f; linear = %0.2f; volume(decibel): %3i; volume(linear): %3i\n",
  15                v, (v*100)/PA_VOLUME_NORM, dB, f, pa_sw_volume_from_dB(dB), pa_sw_volume_from_linear(f));
  16
  17     }
  18
  19     return 0;
  20 }