Method stepProcess

BambooTracker/playback.cpp:386–484

Register update order: volume -> instrument -> effect -> key on

/// Register update order: volume -> instrument -> effect -> key on
void PlaybackManager::stepProcess()
{
	clearDelayWithinStepCounts();
	updateDelayEventCounts();

	auto& song = mod_.lock()->getSong(curSongNum_);

	// Store effects from the step to map
	for (auto& attrib : songStyle_.trackAttribs) {
		auto& step = song.getTrack(attrib.number)
					 .getPatternFromOrderNumber(playingPos_.order).getStep(playingPos_.step);
		size_t uch = static_cast<size_t>(attrib.channelInSource);
		effOnKeyOnMem_[attrib.source].at(uch).clear();
		directRegisterSets_[attrib.source].at(uch).clear();
		using storeFunc = void (PlaybackManager::*)(int, const Effect&);
		static const std::unordered_map<SoundSource, storeFunc> storeEffectToMap = {
			{ SoundSource::FM, &PlaybackManager::storeEffectToMapFM },
			{ SoundSource::SSG, &PlaybackManager::storeEffectToMapSSG },
			{ SoundSource::RHYTHM, &PlaybackManager::storeEffectToMapRhythm },
			{ SoundSource::ADPCM, &PlaybackManager::storeEffectToMapADPCM }
		};
		for (int i = 0; i < Step::N_EFFECT; ++i) {
			Effect&& eff = effect_utils::validateEffect(attrib.source, step.getEffect(i));
			(this->*storeEffectToMap.at(attrib.source))(attrib.channelInSource, eff);
		}
	}

	// Execute step events
	bool isNextSet = executeStoredEffectsGlobal();
	const int countsInStep = tickCounter_.lock()->getCountsInCurrentStep();
	for (auto& attrib : songStyle_.trackAttribs) {
		// Check whether it has been set note delay effect
		size_t uch = static_cast<size_t>(attrib.channelInSource);
		bool hasSetNoteDelay = false;
		auto& mem = effOnStepBeginMem_[attrib.source].at(uch);
		for (auto itr = mem.begin(); itr != mem.end(); ) {
			if (itr->type == EffectType::NoteDelay) {
				if (itr->value < countsInStep) {
					hasSetNoteDelay = true;
				}
				else {
					itr = mem.erase(itr);
					continue;
				}
			}
			++itr;
		}

		//
		auto& step = song.getTrack(attrib.number)
					 .getPatternFromOrderNumber(playingPos_.order).getStep(playingPos_.step);
		switch (attrib.source) {
		case SoundSource::FM:
			if (hasSetNoteDelay) {
				// Set effect
				executeStoredEffectsFM(attrib.channelInSource);
				checkFMNoteDelayAndEnvelopeReset(step, attrib.channelInSource);
				opnaCtrl_->tickEvent(SoundSource::FM, attrib.channelInSource);