float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) {
pa_volume_t left, right;
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_balance(map))
return 0.0f;
get_avg_lr(map, v, &left, &right);
if (left == right)
return 0.0f;
/* 1.0, 0.0 => -1.0
0.0, 1.0 => 1.0
0.0, 0.0 => 0.0
0.5, 0.5 => 0.0
1.0, 0.5 => -0.5
1.0, 0.25 => -0.75
0.75, 0.25 => -0.66
0.5, 0.25 => -0.5 */
if (left > right)
return -1.0f + ((float) right / (float) left);
else
return 1.0f - ((float) left / (float) right);
}
static void m_pa_sink_info_cb(pa_context *c,
const pa_sink_info *i,
int eol,
void *userdata)
{
if (!c || !i || eol > 0) {
return;
}
pa_sink_port_info **ports = NULL;
pa_sink_port_info *port = NULL;
pa_sink_port_info *active_port = NULL;
const char *prop_key = NULL;
void *prop_state = NULL;
int j;
while ((prop_key = pa_proplist_iterate(i->proplist, &prop_state))) {
printf("DEBUG %s %s\n", prop_key, pa_proplist_gets(i->proplist, prop_key));
}
m_channel_num = i->channel_map.channels;
printf("DEBUG channel_map_can_balance %s, channel_map_count %d\n",
pa_channel_map_can_balance(&i->channel_map) ? "TRUE" : "FALSE",
i->channel_map.channels);
for (j = 0; j < i->channel_map.channels; j++) {
printf("DEBUG channel_map %d\n", i->channel_map.map[j]);
}
ports = i->ports;
for (j = 0; j < i->n_ports; j++) {
port = ports[j];
printf("DEBUG port %s %s %s\n",
port->name,
port->description,
port->available ? "TRUE" : "FALSE");
}
active_port = i->active_port;
if (active_port) {
printf("DEBUG active_port %s %s %s\n",
active_port->name,
active_port->description,
active_port->available ? "TRUE" : "FALSE");
}
for (j = 0; j < i->volume.channels; j++) {
printf("DEBUG volume_channel_value %d\n", i->volume.values[j]);
}
gtk_adjustment_set_value(m_adjust, i->volume.values[0]);
printf("DEBUG sink %s %s base_volume %d muted %s\n",
i->name,
i->description,
i->base_volume,
i->mute ? "TRUE" : "FALSE");
}
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_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
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_balance >= -1.0f, NULL);
pa_return_val_if_fail(new_balance <= 1.0f, NULL);
if (!pa_channel_map_can_balance(map))
return v;
return set_balance(v, map, new_balance, on_left, on_right);
}
pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
pa_volume_t left, nleft, right, nright, 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_balance >= -1.0f, NULL);
pa_return_val_if_fail(new_balance <= 1.0f, NULL);
if (!pa_channel_map_can_balance(map))
return v;
get_avg_lr(map, v, &left, &right);
m = PA_MAX(left, right);
if (new_balance <= 0) {
nright = (new_balance + 1.0f) * m;
nleft = m;
} else {
nleft = (1.0f - new_balance) * m;
nright = m;
}
for (c = 0; c < map->channels; c++) {
if (on_left(map->map[c])) {
if (left == 0)
v->values[c] = nleft;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
} else if (on_right(map->map[c])) {
if (right == 0)
v->values[c] = nright;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
}
}
return v;
}
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;
}
