static PyObject* PulseAudio_set_volume(output_PulseAudio *self, PyObject *args)
{
pa_cvolume cvolume;
pa_operation *op;
struct get_volume_cb_data cb_data = {self->mainloop, &cvolume};
double new_volume_d;
pa_volume_t new_volume;
if (!PyArg_ParseTuple(args, "d", &new_volume_d))
return NULL;
/*ensure output stream is still running*/
/*FIXME*/
/*convert volume to integer pa_volume_t value between
PA_VOLUME_MUTED and PA_VOLUME_NORM*/
new_volume = round(new_volume_d * PA_VOLUME_NORM);
pa_threaded_mainloop_lock(self->mainloop);
/*query stream info for current sink*/
op = pa_context_get_sink_info_by_index(
self->context,
pa_stream_get_device_index(self->stream),
(pa_sink_info_cb_t)get_volume_callback,
&cb_data);
/*wait for callback to complete*/
while (pa_operation_get_state(op) == PA_OPERATION_RUNNING) {
pa_threaded_mainloop_wait(self->mainloop);
}
pa_operation_unref(op);
/*scale values using the new volume setting*/
pa_cvolume_scale(&cvolume, new_volume);
/*set sink's volume values*/
op = pa_context_set_sink_volume_by_index(
self->context,
pa_stream_get_device_index(self->stream),
&cvolume,
(pa_context_success_cb_t)set_volume_callback,
self->mainloop);
/*wait for callback to complete*/
while (pa_operation_get_state(op) == PA_OPERATION_RUNNING) {
pa_threaded_mainloop_wait(self->mainloop);
}
pa_operation_unref(op);
pa_threaded_mainloop_unlock(self->mainloop);
Py_INCREF(Py_None);
return Py_None;
}
pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec) {
pa_volume_t m;
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(dec), NULL);
m = pa_cvolume_max(v);
if (m <= PA_VOLUME_MUTED + dec)
m = PA_VOLUME_MUTED;
else
m -= dec;
return pa_cvolume_scale(v, m);
}
pa_cvolume* pa_cvolume_inc_clamp(pa_cvolume *v, pa_volume_t inc, pa_volume_t limit) {
pa_volume_t m;
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(inc), NULL);
m = pa_cvolume_max(v);
if (m >= limit - inc)
m = limit;
else
m += inc;
return pa_cvolume_scale(v, m);
}
pa_cvolume* pa_cvolume_scale_mask(pa_cvolume *v, pa_volume_t max, pa_channel_map *cm, pa_channel_position_mask_t mask) {
unsigned c;
pa_volume_t t = 0;
pa_assert(v);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(max), NULL);
if (!cm)
return pa_cvolume_scale(v, max);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, cm), NULL);
t = pa_cvolume_max_mask(v, cm, mask);
if (t <= PA_VOLUME_MUTED)
return pa_cvolume_set(v, v->channels, max);
for (c = 0; c < v->channels; c++)
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
return v;
}