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volume: introduce pa_cvolume_{get|set}_position()

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This commit is contained in:
Lennart Poettering 2009-05-13 15:20:45 +02:00
parent 28069ef0f7
commit 905c8004a0
2 changed files with 59 additions and 0 deletions
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46
src/pulse/volume.c
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@ -685,3 +685,49 @@ pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float
return v;
}
pa_cvolume* pa_cvolume_set_position(
pa_cvolume *cv,
const pa_channel_map *map,
pa_channel_position_t t,
pa_volume_t v) {
unsigned c;
pa_bool_t good = FALSE;
pa_assert(cv);
pa_assert(map);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), NULL);
pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, NULL);
for (c = 0; c < map->channels; c++)
if (map->map[c] == t) {
cv->values[c] = v;
good = TRUE;
}
return good ? cv : NULL;
}
pa_volume_t pa_cvolume_get_position(
pa_cvolume *cv,
const pa_channel_map *map,
pa_channel_position_t t) {
unsigned c;
pa_volume_t v = PA_VOLUME_MUTED;
pa_assert(cv);
pa_assert(map);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED);
pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED);
for (c = 0; c < map->channels; c++)
if (map->map[c] == t)
if (cv->values[c] > v)
v = cv->values[c];
return v;
}