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engines/mm/shared/xeen/sound_driver_mt32.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 MM_SHARED_XEEN_SOUND_DRIVER_MT32_H
+#define MM_SHARED_XEEN_SOUND_DRIVER_MT32_H
+
+
+#include "audio/mididrv.h"
+#include "mm/shared/xeen/sound_driver.h"
+
+namespace MM {
+namespace Shared {
+namespace Xeen {
+
+class SoundDriverMT32 : public SoundDriver {
+	struct MidiValue {
+		uint32 _val;
+
+		MidiValue(uint8 command, uint8 op1, uint8 op2) {
+			_val = (command) | ((uint32)op2 << 16) | ((uint32)op1 << 8);
+		}
+	};
+public:
+	MidiDriver *_midiDriver;
+	uint32 _timerCount;
+private:
+	static const uint8 MIDI_NOTE_MAP[24];
+private:
+	Common::Queue<MidiValue> _queue;
+	Common::Mutex _driverMutex;
+	const byte *_musInstrumentPtrs[16];
+	const byte *_fxInstrumentPtrs[16];
+	byte _last_notes[16];
+	int _field180;
+	int _field181;
+	int _field182;
+	int _musicVolume, _sfxVolume;
+private:
+	/**
+	 * Initializes the state of the MT32 driver
+	 */
+	void initialize();
+
+	/**
+	 * Adds a register write to the pending queue that will be flushed
+	 * out to the MT32 on the next timer call
+	 */
+	void write(uint8 command, uint8 op1, uint8 op2);
+
+	/**
+	 * Flushes any pending writes to the OPL
+	 */
+	void flush();
+
+	/**
+	 * Resets all the output frequencies
+	 */
+	void resetFrequencies();
+
+	/**
+	 * Starts playing an instrument
+	 */
+	void playInstrument(byte channelNum, const byte *data, bool isFx);
+
+	/**
+	 * Calculates the scaling/volume level to output based on sfx or music master volume
+	 */
+	byte calculateLevel(byte level, bool isFx);
+
+	/**
+	 * Maps note using hardcoded notes table
+	 */
+	byte noteMap(byte note);
+protected:
+	bool musSetInstrument(const byte *&srcP, byte param) override;
+	bool musSetPitchWheel(const byte *&srcP, byte param) override;
+	bool musSetPanning(const byte *&srcP, byte param) override;
+	bool musFade(const byte *&srcP, byte param) override;
+	bool musStartNote(const byte *&srcP, byte param) override;
+	bool musSetVolume(const byte *&srcP, byte param) override;
+	bool musInjectMidi(const byte *&srcP, byte param) override;
+	bool musPlayInstrument(const byte *&srcP, byte param) override;
+	bool cmdFreezeFrequency(const byte *&srcP, byte param) override;
+	bool cmdChangeFrequency(const byte *&srcP, byte param) override;
+
+	bool fxSetInstrument(const byte *&srcP, byte param) override;
+	bool fxSetVolume(const byte *&srcP, byte param) override;
+	bool fxMidiReset(const byte *&srcP, byte param) override;
+	bool fxMidiDword(const byte *&srcP, byte param) override;
+	bool fxSetPanning(const byte *&srcP, byte param) override;
+	bool fxChannelOff(const byte *&srcP, byte param) override;
+	bool fxFade(const byte *&srcP, byte param) override;
+	bool fxStartNote(const byte *&srcP, byte param) override;
+	bool fxInjectMidi(const byte *&srcP, byte param) override;
+	bool fxPlayInstrument(const byte *&srcP, byte param) override;
+
+	/**
+	 * Post-processing done when a pause countdown starts or is in progress
+	 */
+	void pausePostProcess() override;
+
+	/**
+	 * Does a reset of any sound effect
+	 */
+	void resetFX() override;
+
+	/**
+	 * Sends SysEx message
+	 */
+	void sysExMessage(const byte *&data) override;
+public:
+	/**
+	 * Constructor
+	 */
+	SoundDriverMT32();
+
+	/**
+	 * Destructor
+	 */
+	~SoundDriverMT32() override;
+
+	/**
+	 * Starts a special effect playing
+	 */
+	void playFX(uint effectId, const byte *data) override;
+
+	/**
+	 * Plays a song
+	 */
+	void playSong(const byte *data) override;
+
+	/**
+	 * Executes special music command
+	 */
+	int songCommand(uint commandId, byte musicVolume = 0, byte sfxVolume = 0) override;
+
+	/**
+	 * Timer function for MT32
+	 */
+	void onTimer();
+};
+
+} // namespace Xeen
+} // namespace Shared
+} // namespace MM
+
+#endif