/* 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 SCI_MIDIPARSER_H
#define SCI_MIDIPARSER_H

#include "sci/resource/resource.h"
#include "sci/sound/music.h"
#include "audio/midiparser.h"

/*
 Sound drivers info: (from driver cmd0)
 AdLib/SB  : track 0 , voices 9 , patch 3	ah=1
 ProAudioSp: track 0 , voices 9 , patch 3	ah=17
 GenerlMIDI: track 7 , voices 32, patch 4	ah=1   SCI1.1
 Game Blast: track 9 , voices 12, patch 101	ah=1
 MT-32	  : track 12, voices 32, patch 1	ah=1
 PC Speaker: track 18, voices 1 , patch 0xFF ah=1
 Tandy	  : track 19, voices 3 , patch 101	ah=1
 IBM PS/1  : track 19, voices 3 , patch 101	ah=1

 */

namespace Sci {

/**
 * An extended standard MIDI (SMF) parser. Sierra used an extra channel
 * with special commands for extended functionality and animation syncing.
 * Refer to MidiParser_SMF() in /sound/midiparser_smf.cpp for the standard
 * MIDI (SMF) parser functionality that the SCI MIDI parser is based on
 */
class MidiParser_SCI : public MidiParser {
public:
	MidiParser_SCI(SciVersion soundVersion, SciMusic *music);
	~MidiParser_SCI() override;

	void mainThreadBegin();
	void mainThreadEnd();

	bool loadMusic(SoundResource::Track *track, MusicEntry *psnd, int channelFilterMask, SciVersion soundVersion);
	bool loadMusic(byte *, uint32) override {
		return false;
	}
	void initTrack();
	void sendInitCommands();
	void unloadMusic() override;
	void setMasterVolume(byte masterVolume);
	void setVolume(byte volume);
	void stop() {
		_abortParse = true;
		allNotesOff();
	}
	void pause() {
		allNotesOff();
		if (_resetOnPause)
			jumpToTick(0);
	}

	void allNotesOff() override;

	const SciSpan<const byte> &getMixedData() const { return *_mixedData; }
	byte getSongReverb();

	void sendFromScriptToDriver(uint32 midi);
	void sendToDriver(uint32 midi) override;
	void sendToDriver(byte status, byte firstOp, byte secondOp) {
		sendToDriver(status | ((uint32)firstOp << 8) | ((uint32)secondOp << 16));
	}

	void remapChannel(int channel, int devChannel);

protected:
	void parseNextEvent(EventInfo &info) override;
	bool processEvent(const EventInfo &info, bool fireEvents = true) override;
	void midiMixChannels();
	void midiFilterChannels(int channelMask);
	byte midiGetNextChannel(long ticker);
	void resetStateTracking();
	void trackState(uint32 midi);
	void sendToDriver_raw(uint32 midi);

	SciMusic *_music;

	// this is set, when main thread calls us -> we send commands to queue instead to driver
	bool _mainThreadCalled;

	SciVersion _soundVersion;
	Common::SpanOwner<SciSpan<const byte> > _mixedData;
	SoundResource::Track *_track;
	MusicEntry *_pSnd;
	uint32 _loopTick;
	byte _masterVolume; // the overall master volume (same for all tracks)
	byte _volume; // the global volume of the current track

	bool _resetOnPause;

	bool _channelUsed[16];
	int16 _channelRemap[16];
	byte _channelVolume[16];

	struct ChannelState {
		int8 _modWheel;
		int8 _pan;
		int8 _patch;
		int8 _note;
		bool _sustain;
		int16 _pitchWheel;
		int8 _voices;
	};

	ChannelState _channelState[16];

};

} // End of namespace Sci

#endif
