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engines/scumm/players/player_pce.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 SCUMM_PLAYERS_PLAYER_PCE_H
+#define SCUMM_PLAYERS_PLAYER_PCE_H
+
+#include "common/scummsys.h"
+#include "common/mutex.h"
+#include "scumm/music.h"
+#include "audio/audiostream.h"
+#include "audio/mixer.h"
+
+// PCE sound engine is only used by Loom, which requires 16bit color support
+#ifdef USE_RGB_COLOR
+
+namespace Scumm {
+
+class ScummEngine;
+class PSG_HuC6280;
+
+class Player_PCE : public Audio::AudioStream, public MusicEngine {
+private:
+	struct channel_t {
+		int id;
+
+		byte controlVec0;
+		byte controlVec1;
+		byte controlVec2;
+		byte controlVec5;
+		byte balance;
+		byte balance2;
+		byte controlVec8;
+		byte controlVec9;
+		byte controlVec10;
+		byte controlVec11;
+		int16 soundUpdateCounter;
+		byte controlVec18;
+		byte controlVec19;
+		byte waveformCtrl;
+		byte controlVec21;
+		bool controlVec23;
+		bool controlVec24;
+
+		uint16 controlVecShort02;
+		uint16 controlVecShort03;
+		int16 controlVecShort06;
+		uint16 freq;
+		uint16 controlVecShort09;
+		uint16 controlVecShort10;
+
+		const byte* soundDataPtr;
+		const byte* controlBufferPos;
+	};
+
+public:
+	Player_PCE(ScummEngine *scumm, Audio::Mixer *mixer);
+	~Player_PCE() override;
+
+	void setMusicVolume(int vol) override { _maxvol = vol; }
+	void startSound(int sound) override;
+	void stopSound(int sound) override;
+	void stopAllSounds() override;
+	int  getSoundStatus(int sound) const override;
+	int  getMusicTimer() override;
+
+	// AudioStream API
+	int readBuffer(int16 *buffer, const int numSamples) override;
+	bool isStereo() const override { return true; }
+	bool endOfData() const override { return false; }
+	int getRate() const override { return _sampleRate; }
+
+private:
+	ScummEngine *_vm;
+	Audio::Mixer *_mixer;
+	Audio::SoundHandle _soundHandle;
+	int _sampleRate;
+	int _maxvol;
+
+private:
+	PSG_HuC6280 *_psg;
+	channel_t channels[12];
+	Common::Mutex _mutex;
+
+	// number of samples per timer period
+	int _samplesPerPeriod;
+	int16* _sampleBuffer;
+	int _sampleBufferCnt;
+
+	void PSG_Write(int reg, byte data);
+
+	void setupWaveform(byte bank);
+	void procA541(channel_t *channel);
+	void updateSound();
+	void procA731(channel_t *channel);
+	void processSoundData(channel_t *channel);
+	void procAA62(channel_t *channel, int a);
+	void procAB7F(channel_t *channel);
+	void procAC24(channel_t *channel);
+	void procACEA(channel_t *channel, int a);
+};
+
+} // End of namespace Scumm
+
+#endif // USE_RGB_COLOR
+
+#endif