Initial commit

engines/saga2/music.cpp

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+/* 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/>.
+ *
+ */
+
+// MIDI music class
+
+#include "saga2/saga2.h"
+#include "saga2/fta.h"
+
+#include "saga2/music.h"
+#include "saga2/hresmgr.h"
+
+#include "audio/mididrv.h"
+#include "audio/mididrv_ms.h"
+#include "audio/midiparser.h"
+#include "audio/miles.h"
+#include "common/config-manager.h"
+#include "common/file.h"
+#include "common/substream.h"
+
+namespace Saga2 {
+
+Music::Music(hResContext *musicRes) : _musicContext(musicRes), _parser(nullptr) {
+	static const char *opl2InstDefFilename = "SAMPLE.AD";
+	static const char *opl3InstDefFilename = "SAMPLE.OPL";
+
+	// TODO Confirm this
+	_musicType = MT_GM;
+
+	MidiDriver::DeviceHandle dev = MidiDriver::detectDevice(MDT_MIDI | MDT_ADLIB | MDT_PREFER_GM);
+	_driverType = MidiDriver::getMusicType(dev);
+	if (_driverType == MT_GM && ConfMan.getBool("native_mt32"))
+		_driverType = MT_MT32;
+
+	switch (_driverType) {
+	case MT_ADLIB:
+		if (Common::File::exists(opl2InstDefFilename) && Common::File::exists(opl3InstDefFilename)) {
+			_driver = (MidiDriver_Multisource *)Audio::MidiDriver_Miles_AdLib_create(opl2InstDefFilename, opl3InstDefFilename);
+		} else {
+			error("Could not find AdLib instrument definition files %s and %s", opl2InstDefFilename, opl3InstDefFilename);
+		}
+		break;
+	case MT_MT32:
+	case MT_GM:
+		_driver = Audio::MidiDriver_Miles_MIDI_create(_musicType, "");
+		break;
+	default:
+		_driver = new MidiDriver_NULL_Multisource();
+		break;
+	}
+
+	if (_driver) {
+		_driver->property(MidiDriver::PROP_USER_VOLUME_SCALING, true);
+		_driver->property(MidiDriver::PROP_MILES_VERSION, Audio::MILES_VERSION_3);
+		if (_driver->open() != 0)
+			error("Failed to open MIDI driver.");
+
+		_driver->setTimerCallback(this, &timerCallback);
+		_driver->setSourceNeutralVolume(255);
+	}
+
+	_currentVolume = 255;
+	_currentMusicBuffer = nullptr;
+
+	_trackNumber = 0;
+
+	syncSoundSettings();
+}
+
+Music::~Music() {
+	if (_parser) {
+		_parser->stopPlaying();
+		delete _parser;
+	}
+	if (_driver) {
+		_driver->setTimerCallback(nullptr, nullptr);
+		_driver->close();
+		delete _driver;
+	}
+}
+
+void Music::setVolume(int volume) {
+	if (_driver)
+		_driver->setSourceVolume(0, volume);
+
+	_currentVolume = volume;
+}
+
+bool Music::isPlaying() {
+	return _parser ? _parser->isPlaying() : false;
+}
+
+void Music::play(uint32 resourceId, MusicFlags flags) {
+	debug(2, "Music::play %d, %d", resourceId, flags);
+
+	if (isPlaying() && _trackNumber == resourceId)
+		return;
+
+	_trackNumber = resourceId;
+	if (_parser) {
+		_parser->unloadMusic();
+	} else {
+		_parser = MidiParser::createParser_XMIDI(nullptr, nullptr, 0);
+
+		_parser->setMidiDriver(_driver);
+		_parser->setTimerRate(_driver->getBaseTempo());
+		_parser->property(MidiParser::mpCenterPitchWheelOnUnload, 1);
+		_parser->property(MidiParser::mpSendSustainOffOnNotesOff, 1);
+	}
+
+	free(_currentMusicBuffer);
+
+	_currentMusicBuffer = (byte *)LoadResource(_musicContext, resourceId, "music data");
+	uint32 size = _musicContext->size(resourceId);
+
+	// Handle music looping
+	_parser->property(MidiParser::mpAutoLoop, flags & MUSIC_LOOP);
+	if (!_parser->loadMusic(_currentMusicBuffer, size))
+		error("Music::play() wrong music resource");
+}
+
+void Music::pause() {
+	if (_parser)
+		_parser->pausePlaying();
+}
+
+void Music::resume() {
+	if (_parser)
+		_parser->resumePlaying();
+}
+
+void Music::stop() {
+	if (_parser)
+		_parser->stopPlaying();
+}
+
+void Music::syncSoundSettings() {
+	if (_driver)
+		_driver->syncSoundSettings();
+}
+
+void Music::onTimer() {
+	if (_parser)
+		_parser->onTimer();
+}
+
+void Music::timerCallback(void *data) {
+	((Music *)data)->onTimer();
+}
+} // End of namespace Saga