Initial commit

engines/prince/music.cpp

@@ -0,0 +1,235 @@
+/* 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