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engines/sky/music/gmchannel.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 SKY_MUSIC_GMCHANNEL_H
+#define SKY_MUSIC_GMCHANNEL_H
+
+#include "sky/music/musicbase.h"
+
+class MidiDriver;
+
+namespace Sky {
+
+typedef struct {
+	uint16 eventDataPtr;
+	int32 nextEventTime;
+	uint16 loopPoint;
+	uint8 midiChannelNumber;
+	uint8 note;
+	bool channelActive;
+} MidiChannelType;
+
+class GmChannel : public ChannelBase {
+public:
+	GmChannel(uint8 *pMusicData, uint16 startOfData, MidiDriver *pMidiDrv, const byte *pInstMap, const byte *veloTab);
+	~GmChannel() override;
+	virtual void stopNote();
+	uint8 process(uint16 aktTime) override;
+	void updateVolume(uint16 pVolume) override;
+	bool isActive() override;
+private:
+	const byte *_instMap;
+	const byte *_veloTab;
+	MidiDriver *_midiDrv;
+	uint8 *_musicData;
+	uint16 _musicVolume;
+	MidiChannelType _channelData;
+	uint8 _currentChannelVolume;
+	//-                          normal subs
+	void setRegister(uint8 regNum, uint8 value);
+	int32 getNextEventTime();
+	uint16 getNextNote(uint8 param);
+	void adlibSetupInstrument();
+	void setupInstrument(uint8 opcode);
+	void setupChannelVolume(uint8 volume);
+	//-                          Streamfunctions from Command90hTable
+	void com90_caseNoteOff();        // 0
+	void com90_stopChannel();        // 1
+	void com90_setupInstrument();    // 2
+	uint8 com90_updateTempo();       // 3
+	//void com90_dummy();            // 4
+	void com90_getPitch();           // 5
+	void com90_getChannelVolume();   // 6
+	//void com90_skipTremoVibro();   // 7
+	void com90_loopMusic();        // 8
+	void com90_keyOff();             // 9
+	//void com90_error();            // 10
+	void com90_getChannelPanValue(); // 11
+	void com90_setLoopPoint();     // 12
+	void com90_getChannelControl();     // 13
+};
+
+} // End of namespace Sky
+
+#endif //SKYGMCHANNEL_H