scummvm/engines/prince/music.cpp

/* 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/>.
 *
 */

#include "prince/prince.h"
#include "prince/music.h"
#include "prince/musNum.h"
#include "prince/resource.h"

#include "common/archive.h"
#include "common/debug.h"
#include "audio/mididrv.h"
#include "audio/midiparser.h"

namespace Prince {

const char *MusicPlayer::_musTable[] = {
	"",
	"Battlfld.mid",
	"Cave.mid",
	"Cemetery.mid",
	"Credits.mid",
	"Fjord.mid",
	"Guitar.mid",
	"Hell.mid",
	"Jingle.mid",
	"Main.mid",
	"Night.mid",
	"Reality.mid",
	"Sunlord.mid",
	"Tavern.mid",
	"Temple.mid",
	"Boruta.mid",
	"Intro.mid"
};

const uint8 MusicPlayer::_musRoomTable[] = {
	0,
	ROOM01MUS,
	ROOM02MUS,
	ROOM03MUS,
	ROOM04MUS,
	ROOM05MUS,
	ROOM06MUS,
	ROOM07MUS,
	ROOM08MUS,
	ROOM09MUS,
	ROOM10MUS,
	ROOM11MUS,
	ROOM12MUS,
	ROOM13MUS,
	ROOM14MUS,
	ROOM15MUS,
	ROOM16MUS,
	ROOM17MUS,
	ROOM18MUS,
	ROOM19MUS,
	ROOM20MUS,
	ROOM21MUS,
	ROOM22MUS,
	ROOM23MUS,
	ROOM24MUS,
	ROOM25MUS,
	ROOM26MUS,
	ROOM27MUS,
	ROOM28MUS,
	ROOM29MUS,
	ROOM30MUS,
	ROOM31MUS,
	ROOM32MUS,
	ROOM33MUS,
	ROOM34MUS,
	ROOM35MUS,
	ROOM36MUS,
	ROOM37MUS,
	ROOM38MUS,
	ROOM39MUS,
	ROOM40MUS,
	ROOM41MUS,
	ROOM42MUS,
	ROOM43MUS,
	0,
	0,
	ROOM46MUS,
	ROOM47MUS,
	ROOM48MUS,
	ROOM49MUS,
	ROOM50MUS,
	ROOM51MUS,
	ROOM52MUS,
	ROOM53MUS,
	ROOM54MUS,
	ROOM55MUS,
	ROOM56MUS,
	ROOM57MUS,
	ROOM58MUS,
	ROOM59MUS,
	ROOM60MUS,
	ROOM61MUS
};


MusicPlayer::MusicPlayer(PrinceEngine *vm) : _vm(vm) {
	_data = nullptr;
	_dataSize = 0;
	_isGM = false;

	MidiPlayer::createDriver();

	int ret = _driver->open();
	if (ret == 0) {
		if (_nativeMT32)
			_driver->sendMT32Reset();
		else
			_driver->sendGMReset();

		_driver->setTimerCallback(this, &timerCallback);
	}
}

MusicPlayer::~MusicPlayer() {
	killMidi();
}

void MusicPlayer::killMidi() {
	Audio::MidiPlayer::stop();

	free(_data);
	_data = nullptr;
}

void MusicPlayer::loadMidi(const char *name) {
	Common::SeekableReadStream *stream = SearchMan.createReadStreamForMember(name);
	if (!stream) {
		warning("Can't load midi stream %s", name);
		return;
	}

	stream = Resource::getDecompressedStream(stream);

	// Stop any currently playing MIDI file
	killMidi();

	// Read in the data for the file
	_dataSize = stream->size();
	_data = (byte *)malloc(_dataSize);
	stream->read(_data, _dataSize);

	delete stream;

	// Start playing the music
	sndMidiStart();
}

void MusicPlayer::sndMidiStart() {
	_isGM = true;

	MidiParser *parser = MidiParser::createParser_SMF();
	if (parser->loadMusic(_data, _dataSize)) {
		parser->setTrack(0);
		parser->setMidiDriver(this);
		parser->setTimerRate(_driver->getBaseTempo());
		parser->property(MidiParser::mpCenterPitchWheelOnUnload, 1);

		_parser = parser;

		syncVolume();

		// Al the tracks are supposed to loop
		_isLooping = true;
		_isPlaying = true;
	}
}

void MusicPlayer::send(uint32 b) {
	if ((b & 0xF0) == 0xC0 && !_isGM && !_nativeMT32) {
		b = (b & 0xFFFF00FF) | MidiDriver::_mt32ToGm[(b >> 8) & 0xFF] << 8;
	}

	Audio::MidiPlayer::send(b);
}

void MusicPlayer::sendToChannel(byte channel, uint32 b) {
	if (!_channelsTable[channel]) {
		_channelsTable[channel] = (channel == 9) ? _driver->getPercussionChannel() : _driver->allocateChannel();
		// If a new channel is allocated during the playback, make sure
		// its volume is correctly initialized.
		if (_channelsTable[channel])
			_channelsTable[channel]->volume(_channelsVolume[channel] * _masterVolume / 255);
	}

	if (_channelsTable[channel])
		_channelsTable[channel]->send(b);
}

bool PrinceEngine::loadMusic(int musNumber) {
	uint8 midiNumber = MusicPlayer::_musRoomTable[musNumber];
	if (midiNumber) {
		if (midiNumber != 100) {
			 if (_currentMidi != midiNumber) {
				_currentMidi = midiNumber;
				const char *musName = MusicPlayer::_musTable[_currentMidi];
				_midiPlayer->loadMidi(musName);
			 }
		}
	} else {
		stopMusic();
	}
	return true;
}

void PrinceEngine::stopMusic() {
	if (_midiPlayer->isPlaying()) {
		_midiPlayer->stop();
	}
}

} // End of namespace Prince