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engines/queen/music.h

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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/>.
+ *
+ */
+
+#ifndef QUEEN_MUSIC_H
+#define QUEEN_MUSIC_H
+
+#include "common/util.h"
+#include "common/mutex.h"
+#include "common/random.h"
+#include "audio/mididrv.h"
+
+class MidiParser;
+
+namespace Queen {
+
+struct TuneData;
+
+class QueenEngine;
+
+class MidiMusic : public MidiDriver_BASE {
+public:
+	MidiMusic(QueenEngine *vm);
+	~MidiMusic() override;
+	void setVolume(int volume);
+	int getVolume()	const { return _masterVolume; }
+
+	void playSong(uint16 songNum);
+	void stopSong() { stopMusic(); }
+	void playMusic();
+	void stopMusic();
+	void setLoop(bool loop)		{ _isLooping = loop; }
+	void queueTuneList(int16 tuneList);
+	bool queueSong(uint16 songNum);
+	void queueClear();
+	void toggleVChange();
+
+	// MidiDriver_BASE interface implementation
+	void send(uint32 b) override;
+	void metaEvent(byte type, const byte *data, uint16 length) override;
+
+protected:
+
+	enum {
+		MUSIC_QUEUE_SIZE	=	14
+	};
+
+	void queueUpdatePos();
+	uint8 randomQueuePos();
+	void onTimer();
+	uint32 songOffset(uint16 songNum) const;
+	uint32 songLength(uint16 songNum) const;
+
+	static void timerCallback(void *refCon) { ((MidiMusic *)refCon)->onTimer(); }
+
+	MidiDriver *_driver;
+	MidiParser *_parser;
+	MidiChannel *_channelsTable[16];
+	byte _channelsVolume[16];
+	bool _adlib;
+	bool _nativeMT32;
+	Common::Mutex _mutex;
+	Common::RandomSource _rnd;
+
+	bool _isPlaying;
+	bool _isLooping;
+	bool _randomLoop;
+	byte _masterVolume;
+	uint8 _queuePos;
+	int16 _currentSong;
+	int16 _lastSong;	//first song from previous queue
+	int16 _songQueue[MUSIC_QUEUE_SIZE];
+
+	uint16 _numSongs;
+	uint16 *_buf;
+	uint32 _musicDataSize;
+	bool _vToggle;
+	byte *_musicData;
+	const TuneData *_tune;
+};
+
+} // End of namespace Queen
+
+#endif