3 #include <pulse/volume.h>
4 #include <pulse/gccmacro.h>
6 int main(int argc, char *argv[]) {
12 for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
14 double dB = pa_sw_volume_to_dB(v);
15 double f = pa_sw_volume_to_linear(v);
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));
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];
24 pa_cvolume_set(&cv, 2, v);
26 printf("Volume: %3i [%s] [%s]\n",
28 pa_cvolume_snprint(s, sizeof(s), &cv),
29 pa_sw_cvolume_snprint_dB(t, sizeof(t), &cv));
33 map.channels = cv.channels = 2;
34 map.map[0] = PA_CHANNEL_POSITION_LEFT;
35 map.map[1] = PA_CHANNEL_POSITION_RIGHT;
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];
41 printf("Volume: [%s]; balance: %2.1f\n", pa_cvolume_snprint(s, sizeof(s), &cv), pa_cvolume_get_balance(&map, &cv));
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];
51 printf("Before: volume: [%s]; balance: %2.1f\n", pa_cvolume_snprint(s, sizeof(s), &cv), pa_cvolume_get_balance(&map, &cv));
54 pa_cvolume_set_balance(&map, &r, b);
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" : "");