Esempio n. 1
0
/*
 * Use atomic compare-and-swap to update val to
 * val + inc (*in log-space*).  Update occurs in a loop in case other
 * threads update in the meantime.
 */
inline void incLoopLog(tbb::atomic<double>& val, double inc) {
	double oldMass = val.load();
	double returnedMass = oldMass;
	double newMass{salmon::math::LOG_0};
	do {
	  oldMass = returnedMass;
 	  newMass = salmon::math::logAdd(oldMass, inc);
	  returnedMass = val.compare_and_swap(newMass, oldMass);
	} while (returnedMass != oldMass);
}
Esempio n. 2
0
/*
 * Use atomic compare-and-swap to update val to
 * val + inc.  Update occurs in a loop in case other
 * threads update in the meantime.
 */
inline void incLoop(tbb::atomic<double>& val, double inc) {
        double oldMass = val.load();
        double returnedMass = oldMass;
        double newMass{oldMass + inc};
        do {
            oldMass = returnedMass;
            newMass = oldMass + inc;
            returnedMass = val.compare_and_swap(newMass, oldMass);
        } while (returnedMass != oldMass);
}
Esempio n. 3
0
	virtual boost::unique_future<bool> send(const safe_ptr<read_frame>& frame) override
	{
		bool pushed = frame_buffer_.try_push(frame);

		if (pushed && !first_frame_reported_)
		{
			first_frame_promise_.set_value();
			first_frame_reported_ = true;
		}

		return caspar::wrap_as_future(is_running_.load());
	}
	virtual boost::unique_future<bool> send(const safe_ptr<core::read_frame>& frame) override
	{
		auto buffer = std::make_shared<audio_buffer_16>(
			core::audio_32_to_16(core::get_rearranged_and_mixed(frame->multichannel_view(), channel_layout_, channel_layout_.num_channels)));

		if (!input_.try_push(std::make_pair(frame, buffer)))
			graph_->set_tag("dropped-frame");

		if (Status() != Playing && !started_)
		{
			sf::SoundStream::Initialize(2, format_desc_.audio_sample_rate);
			Play();
			started_ = true;
		}

		return wrap_as_future(is_running_.load());
	}