C++ (Cpp) obs_source_set_volume示例

示例#1

文件： obs-audio-controls.c 项目： alanzw/obs-studio

bool obs_fader_set_db(obs_fader_t *fader, const float db)
{
	if (!fader)
		return false;

	pthread_mutex_lock(&fader->mutex);

	bool clamped  = false;
	fader->cur_db = db;

	if (fader->cur_db > fader->max_db) {
		fader->cur_db = fader->max_db;
		clamped       = true;
	}
	if (fader->cur_db < fader->min_db) {
		fader->cur_db = -INFINITY;
		clamped       = true;
	}

	fader->ignore_next_signal = true;
	obs_source_t *src         = fader->source;
	const float mul           = db_to_mul(fader->cur_db);

	pthread_mutex_unlock(&fader->mutex);

	if (src)
		obs_source_set_volume(src, mul);

	return !clamped;
}

示例#2

文件： adv-audio-control.cpp 项目： jp9000/obs-studio

void OBSAdvAudioCtrl::volumeChanged(double db)
{
	if (db < MIN_DB) {
		volume->setSpecialValueText("-inf dB");
		db = -INFINITY;
	}

	float val = obs_db_to_mul(db);
	obs_source_set_volume(source, val);
}

示例#3

文件： obs.c 项目： Lexsus/obs-studio

obs_source_t *obs_load_source(obs_data_t *source_data)
{
	obs_source_t *source;
	const char   *name    = obs_data_get_string(source_data, "name");
	const char   *id      = obs_data_get_string(source_data, "id");
	obs_data_t   *settings = obs_data_get_obj(source_data, "settings");
	double       volume;

	source = obs_source_create(OBS_SOURCE_TYPE_INPUT, id, name, settings);

	obs_data_set_default_double(source_data, "volume", 1.0);
	volume = obs_data_get_double(source_data, "volume");
	obs_source_set_volume(source, (float)volume);

	obs_data_release(settings);

	return source;
}