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     float b;
  10     pa_channel_map map;
  11
  12     for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
  13
  14         double dB = pa_sw_volume_to_dB(v);
  15         double f = pa_sw_volume_to_linear(v);
  16
  17         printf("Volume: %3i; percent: %i%%; decibel %0.2f; linear = %0.2f; volume(decibel): %3i; volume(linear): %3i\n",
  18                v, (v*100)/PA_VOLUME_NORM, dB, f, pa_sw_volume_from_dB(dB), pa_sw_volume_from_linear(f));
  19     }
  20
  21     for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
  22         char s[PA_CVOLUME_SNPRINT_MAX], t[PA_SW_CVOLUME_SNPRINT_DB_MAX];
  23
  24         pa_cvolume_set(&cv, 2, v);
  25
  26         printf("Volume: %3i [%s] [%s]\n",
  27                v,
  28                pa_cvolume_snprint(s, sizeof(s), &cv),
  29                pa_sw_cvolume_snprint_dB(t, sizeof(t), &cv));
  30
  31     }
  32
  33     map.channels = cv.channels = 2;
  34     map.map[0] = PA_CHANNEL_POSITION_LEFT;
  35     map.map[1] = PA_CHANNEL_POSITION_RIGHT;
  36
  37     for (cv.values[0] = PA_VOLUME_MUTED; cv.values[0] <= PA_VOLUME_NORM*2; cv.values[0] += 4096)
  38         for (cv.values[1] = PA_VOLUME_MUTED; cv.values[1] <= PA_VOLUME_NORM*2; cv.values[1] += 4096) {
  39             char s[PA_CVOLUME_SNPRINT_MAX];
  40
  41             printf("Volume: [%s]; balance: %2.1f\n", pa_cvolume_snprint(s, sizeof(s), &cv), pa_cvolume_get_balance(&map, &cv));
  42         }
  43
  44     for (cv.values[0] = PA_VOLUME_MUTED+4096; cv.values[0] <= PA_VOLUME_NORM*2; cv.values[0] += 4096)
  45         for (cv.values[1] = PA_VOLUME_MUTED; cv.values[1] <= PA_VOLUME_NORM*2; cv.values[1] += 4096)
  46             for (b = -1.0f; b <= 1.0f; b += 0.2f) {
  47                 char s[PA_CVOLUME_SNPRINT_MAX];
  48                 pa_cvolume r;
  49                 float k;
  50
  51                 printf("Before: volume: [%s]; balance: %2.1f\n", pa_cvolume_snprint(s, sizeof(s), &cv), pa_cvolume_get_balance(&map, &cv));
  52
  53                 r = cv;
  54                 pa_cvolume_set_balance(&map, &r, b);
  55
  56                 k = pa_cvolume_get_balance(&map, &r);
  57                 printf("After: volume: [%s]; balance: %2.1f (intended: %2.1f) %s\n", pa_cvolume_snprint(s, sizeof(s), &r), k, b, k < b-.05 || k > b+.5 ? "MISMATCH" : "");
  58             }
  59
  60     return 0;
  61 }