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     pa_cvolume cv;
   9
  10     for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
  11
  12         double dB = pa_sw_volume_to_dB(v);
  13         double f = pa_sw_volume_to_linear(v);
  14
  15         printf("Volume: %3i; percent: %i%%; decibel %0.2f; linear = %0.2f; volume(decibel): %3i; volume(linear): %3i\n",
  16                v, (v*100)/PA_VOLUME_NORM, dB, f, pa_sw_volume_from_dB(dB), pa_sw_volume_from_linear(f));
  17     }
  18
  19     for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
  20         char s[PA_CVOLUME_SNPRINT_MAX], t[PA_SW_CVOLUME_SNPRINT_DB_MAX];
  21
  22         pa_cvolume_set(&cv, 2, v);
  23
  24         printf("Volume: %3i [%s] [%s]\n",
  25                v,
  26                pa_cvolume_snprint(s, sizeof(s), &cv),
  27                pa_sw_cvolume_snprint_dB(t, sizeof(t), &cv));
  28
  29     }
  30
  31     return 0;
  32 }