Method streamCountUp

BambooTracker/playback.cpp:287–314

Stream events **********/

/********** Stream events **********/
int PlaybackManager::streamCountUp()
{
	std::lock_guard<std::mutex> lock(mutex_);

	int state = tickCounter_.lock()->countUp();

	if (state > 0) {	// Tick process in playback
		checkValidPosition();
		tickProcess(state);
	}
	else if (!state) {	// Step process in playback
		checkValidPosition();
		if (stepDown()) {
			stepProcess();
			if (!isFindNextStep_) findNextStep();
		}
		else if (!isPlayingStep()) {
			stopPlay();
		}
	}
	else {	// Stop playback
		for (auto& attrib : songStyle_.trackAttribs) {
			opnaCtrl_->tickEvent(attrib.source, attrib.channelInSource);
		}
	}

	return state;
}

bool PlaybackManager::stepDown()
{