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add api for manipulating volume balances

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This commit is contained in:
Lennart Poettering 2009-01-19 21:45:58 +01:00
parent 606cf8a2ec
commit 723d71a021
4 changed files with 136 additions and 0 deletions
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29
src/tests/voltest.c
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@ -6,6 +6,8 @@
int main(int argc, char *argv[]) {
pa_volume_t v;
pa_cvolume cv;
float b;
pa_channel_map map;
for (v = PA_VOLUME_MUTED; v <= PA_VOLUME_NORM*2; v += 256) {
@ -28,5 +30,32 @@ int main(int argc, char *argv[]) {
}
map.channels = cv.channels = 2;
map.map[0] = PA_CHANNEL_POSITION_LEFT;
map.map[1] = PA_CHANNEL_POSITION_RIGHT;
for (cv.values[0] = PA_VOLUME_MUTED; cv.values[0] <= PA_VOLUME_NORM*2; cv.values[0] += 4096)
for (cv.values[1] = PA_VOLUME_MUTED; cv.values[1] <= PA_VOLUME_NORM*2; cv.values[1] += 4096) {
char s[PA_CVOLUME_SNPRINT_MAX];
printf("Volume: [%s]; balance: %2.1f\n", pa_cvolume_snprint(s, sizeof(s), &cv), pa_cvolume_get_balance(&map, &cv));
}
for (cv.values[0] = PA_VOLUME_MUTED+4096; cv.values[0] <= PA_VOLUME_NORM*2; cv.values[0] += 4096)
for (cv.values[1] = PA_VOLUME_MUTED; cv.values[1] <= PA_VOLUME_NORM*2; cv.values[1] += 4096)
for (b = -1.0f; b <= 1.0f; b += 0.2f) {
char s[PA_CVOLUME_SNPRINT_MAX];
pa_cvolume r;
float k;
printf("Before: volume: [%s]; balance: %2.1f\n", pa_cvolume_snprint(s, sizeof(s), &cv), pa_cvolume_get_balance(&map, &cv));
r = cv;
pa_cvolume_set_balance(&map, &r, b);
k = pa_cvolume_get_balance(&map, &r);
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" : "");
}
return 0;
}