VoiceManager.h

#include "Voice.h"
#include <functional>


class VoiceManager
{
public:
	void onNoteOn(int noteNumber, int velocity);
	void onNoteOff(int noteNumber, int velocity);
	double nextSample();
	void setSampleRate(double sampleRate) {
		EnvelopeGenerator::setSampleRate(sampleRate);
		for (int i = 0; i < NumberOfVoices; i++) {
			Voice& voice = voices[i];
			voice.mOscillatorOne.setSampleRate(sampleRate);
			voice.mOscillatorTwo.setSampleRate(sampleRate);
		}
		mLFO.setSampleRate(sampleRate);
	}
	inline void setLFOMode(Oscillator::OscillatorMode mode) { mLFO.setMode(mode); }
	inline void setLFOFrequency(double frequency) { mLFO.setFrequency(frequency); }
	typedef std::tr1::function<void(Voice&)> VoiceChangerFunction;
	inline void changeAllVoices(VoiceChangerFunction changer) {
		for (int i = 0; i < NumberOfVoices; i++) {
			changer(voices[i]);
		}
	}

	//Functions to change a single voice:
	static void setVolumeEnvelopeStageValue(Voice& voice, EnvelopeGenerator::EnvelopeStage stage, double value) {
		voice.mVolumeEnvelope.setStageValue(stage, value);
	}
	static void setFilterEnvelopeStageValue(Voice& voice, EnvelopeGenerator::EnvelopeStage stage, double value) {
		voice.mFilterEnvelope.setStageValue(stage, value);
	}
	static void setOscillatorMode(Voice& voice, int oscillatorNumber, Oscillator::OscillatorMode mode) {
		switch (oscillatorNumber) {
		case 1:
			voice.mOscillatorOne.setMode(mode);
				  break;
		case 2:
			voice.mOscillatorTwo.setMode(mode);
			break;
		}
	}
	static void setOscillatorPitchMod(Voice& voice, int oscillatorNumber, double amount) {
		switch (oscillatorNumber) {
		case 1:
			voice.setOscillatorOnePitchAmount(amount);
			break;
		case 2:
			voice.setOscillatorTwoPitchAmount(amount);
			break;
		}
	}
	static void setOscillatorMix(Voice& voice, double value) {
		voice.setOscillatorMix(value);
	}
	static void setFilterCutoff(Voice& voice, double cutoff) {
		voice.mFilter.setCutoff(cutoff);
	}
	static void setFilterResonance(Voice& voice, double resonance) {
		voice.mFilter.setResonance(resonance);
	}
	static void setFilterMode(Voice& voice, Filter::FilterMode mode) {
		voice.mFilter.setFilterMode(mode);
	}
	static void setFilterEnvAmount(Voice& voice, double amount) {
		voice.setFilterEnvelopeAmount(amount);
	}
	static void setFilterLFOAmount(Voice& voice, double amount) {
		voice.setFilterLFOAmount(amount);
	}
private:
	static const int NumberOfVoices = 64;
	Voice voices[NumberOfVoices];
	Oscillator mLFO;
	Voice* findFreeVoice();
};