/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef SCUMM_PLAYERS_PLAYER_NES_H
#define SCUMM_PLAYERS_PLAYER_NES_H

#include "common/scummsys.h"
#include "scumm/music.h"
#include "audio/audiostream.h"
#include "audio/mixer.h"

namespace Scumm {

class ScummEngine;
namespace APUe {
class APU;
}

static const int MAXVOLUME = 0x7F;
static const int NUMSLOTS = 3;
static const int NUMCHANS = 4;

/**
 * Scumm NES sound/music driver.
 */
class Player_NES : public Audio::AudioStream, public MusicEngine {
public:
	Player_NES(ScummEngine *scumm, Audio::Mixer *mixer);
	~Player_NES() override;

	void setMusicVolume(int vol) override;
	void startSound(int sound) override;
	void stopSound(int sound) override;
	void stopAllSounds() override;
	int  getSoundStatus(int sound) const override;

	// AudioStream API
	int readBuffer(int16 *buffer, const int numSamples) override;
	bool isStereo() const override { return false; }
	bool endOfData() const override { return false; }
	int getRate() const override { return _sampleRate; }

private:

	void sound_play();
	void playSFX(int nr);
	void playMusic();
	void chainCommand(int chan);
	void checkSilenceChannels(int chan);

	void APU_writeChannel(int chan, int offset, byte value);
	void APU_writeControl(byte value);
	byte APU_readStatus();

	ScummEngine *_vm;
	Audio::Mixer *_mixer;
	Audio::SoundHandle _soundHandle;
	APUe::APU *_apu;
	int _sampleRate;
	int _samples_per_frame;
	int _current_sample;
	int _maxvol;

	struct slot {
		int framesleft;
		int id;
		int type;
		byte *data;
		int offset;
	} _slot[NUMSLOTS];

	struct mchan {
		int command;
		int framedelay;
		int pitch;
		int volume;
		int voldelta;
		int envflags;
		int cmdlock;
	} _mchan[NUMCHANS];

	bool isSFXplaying, wasSFXplaying;

	int numNotes;
	byte *auxData1;
	byte *auxData2;
};

} // End of namespace Scumm

#endif