static void
set_from_pa_map (GvcChannelMap *map,
const pa_channel_map *pa_map)
{
g_assert (pa_channel_map_valid(pa_map));
map->priv->can_balance = pa_channel_map_can_balance (pa_map);
map->priv->can_fade = pa_channel_map_can_fade (pa_map);
map->priv->pa_map = *pa_map;
pa_cvolume_set(&map->priv->pa_volume, pa_map->channels, PA_VOLUME_NORM);
}
pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
pa_assert(map);
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
pa_return_val_if_fail(new_fade >= -1.0f, NULL);
pa_return_val_if_fail(new_fade <= 1.0f, NULL);
if (!pa_channel_map_can_fade(map))
return v;
return set_balance(v, map, new_fade, on_rear, on_front);
}
pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
pa_volume_t front, nfront, rear, nrear, m;
unsigned c;
pa_assert(map);
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
pa_return_val_if_fail(new_fade >= -1.0f, NULL);
pa_return_val_if_fail(new_fade <= 1.0f, NULL);
if (!pa_channel_map_can_fade(map))
return v;
get_avg_fr(map, v, &front, &rear);
m = PA_MAX(front, rear);
if (new_fade <= 0) {
nfront = (new_fade + 1.0f) * m;
nrear = m;
} else {
nrear = (1.0f - new_fade) * m;
nfront = m;
}
for (c = 0; c < map->channels; c++) {
if (on_front(map->map[c])) {
if (front == 0)
v->values[c] = nfront;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
} else if (on_rear(map->map[c])) {
if (rear == 0)
v->values[c] = nrear;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
}
}
return v;
}
float pa_cvolume_get_fade(const pa_cvolume *v, const pa_channel_map *map) {
pa_volume_t front, rear;
pa_assert(v);
pa_assert(map);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
if (!pa_channel_map_can_fade(map))
return 0.0f;
get_avg_fr(map, v, &front, &rear);
if (front == rear)
return 0.0f;
if (rear > front)
return -1.0f + ((float) front / (float) rear);
else
return 1.0f - ((float) rear / (float) front);
}
static pa_hook_result_t sink_input_fixate_hook_callback(pa_core *core, pa_sink_input_new_data *data, struct userdata *u) {
const char *hpos, *vpos, *role, *id;
double f;
char t[PA_CVOLUME_SNPRINT_MAX];
pa_cvolume v;
pa_assert(data);
if (!(role = pa_proplist_gets(data->proplist, PA_PROP_MEDIA_ROLE)))
return PA_HOOK_OK;
if (!pa_streq(role, "event"))
return PA_HOOK_OK;
if ((id = pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID))) {
/* The test sounds should never be positioned in space, since
* they might be triggered themselves to configure the speakers
* in space, which we don't want to mess up. */
if (pa_startswith(id, "audio-channel-"))
return PA_HOOK_OK;
if (pa_streq(id, "audio-volume-change"))
return PA_HOOK_OK;
if (pa_streq(id, "audio-test-signal"))
return PA_HOOK_OK;
}
if (!(hpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_HPOS)))
hpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_HPOS);
if (!(vpos = pa_proplist_gets(data->proplist, PA_PROP_EVENT_MOUSE_VPOS)))
vpos = pa_proplist_gets(data->proplist, PA_PROP_WINDOW_VPOS);
if (!hpos && !vpos)
return PA_HOOK_OK;
pa_cvolume_reset(&v, data->sink->sample_spec.channels);
if (hpos) {
if (parse_pos(hpos, &f) < 0)
return PA_HOOK_OK;
if (pa_channel_map_can_balance(&data->sink->channel_map)) {
pa_log_debug("Positioning event sound '%s' horizontally at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
pa_cvolume_set_balance(&v, &data->sink->channel_map, f*2.0-1.0);
}
}
if (vpos) {
if (parse_pos(vpos, &f) < 0)
return PA_HOOK_OK;
if (pa_channel_map_can_fade(&data->sink->channel_map)) {
pa_log_debug("Positioning event sound '%s' vertically at %0.2f.", pa_strnull(pa_proplist_gets(data->proplist, PA_PROP_EVENT_ID)), f);
pa_cvolume_set_fade(&v, &data->sink->channel_map, f*2.0-1.0);
}
}
pa_log_debug("Final volume factor %s.", pa_cvolume_snprint(t, sizeof(t), &v));
pa_sink_input_new_data_add_volume_factor_sink(data, u->name, &v);
return PA_HOOK_OK;
}
