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audio/softsynth/fmtowns_pc98/sega_audio.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 SEGA_AUDIO_H
+#define SEGA_AUDIO_H
+
+#include "common/scummsys.h"
+
+namespace Audio {
+class Mixer;
+}
+
+class SegaAudioInterfaceInternal;
+class SegaAudioPluginDriver {
+public:
+	virtual ~SegaAudioPluginDriver() {}
+	virtual void timerCallback60Hz() {}
+	virtual void timerCallbackA() {}
+	virtual void timerCallbackB() {}
+};
+
+class SegaAudioInterface {
+public:
+	SegaAudioInterface(Audio::Mixer *mixer, SegaAudioPluginDriver *driver);
+	~SegaAudioInterface();
+
+	bool init();
+	void reset();
+
+	void loadPCMData(uint16 address, const uint8 *data, uint16 dataSize);
+	void playPCMChannel(uint8 channel, uint8 dataStart, uint16 loopStart, uint16 rate, uint8 pan, uint8 env);
+	void stopPCMChannel(uint8 channel);
+
+	void writeReg(uint8 part, uint8 regAddress, uint8 value);
+	uint8 readReg(uint8 part, uint8 regAddress);
+
+	void psgWrite(uint8 data);
+
+	void setMusicVolume(int volume);
+	void setSoundEffectVolume(int volume);
+
+	// Defines the channels used as sound effect channels for the purpose of ScummVM GUI volume control.
+	// The first 6 bits are 6 fm channels. The next 3 bits are psg channels. The bits that follow represent pcm channels.
+	void setSoundEffectChanMask(int mask);
+
+	class MutexLock {
+		friend class SegaAudioInterface;
+	public:
+		~MutexLock();
+	private:
+		MutexLock(SegaAudioInterfaceInternal *saii, int reverse = 0);
+		SegaAudioInterfaceInternal *_saii;
+		int _count;
+	};
+
+	MutexLock stackLockMutex();
+	MutexLock stackUnlockMutex();
+
+private:
+	SegaAudioInterfaceInternal *_internal;
+};
+
+#endif