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engines/sky/music/adlibchannel.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_ADLIBCHANNEL_H
+#define SKY_MUSIC_ADLIBCHANNEL_H
+
+#include "sky/music/musicbase.h"
+
+namespace OPL {
+class OPL;
+}
+
+namespace Sky {
+
+typedef struct {
+	uint8 ad_Op1, ad_Op2;
+	uint8 sr_Op1, sr_Op2;
+	uint8 ampMod_Op1, ampMod_Op2;
+	uint8 waveSelect_Op1, waveSelect_Op2;
+	uint8 bindedEffect;
+	uint8 feedBack;
+	uint8 totOutLev_Op1, totOutLev_Op2;
+	uint8 scalingLevel;
+	uint8 pad1, pad2, pad3;
+} InstrumentStruct;
+
+typedef struct {
+	uint16 eventDataPtr;
+	int32 nextEventTime;
+	uint16 loopPoint;
+	uint8 adlibChannelNumber;
+	uint8 lastCommand;
+	bool channelActive;
+	uint8 note;
+	uint8 adlibReg1, adlibReg2;
+	InstrumentStruct *instrumentData;
+	uint8 assignedInstrument;
+	uint8 channelVolume;
+	uint8 padding; // field_12 / not used by original driver
+	uint8 tremoVibro;
+	uint8 freqOffset;
+	uint16 frequency;
+} AdLibChannelType;
+
+class AdLibChannel : public ChannelBase {
+public:
+	AdLibChannel (OPL::OPL *opl, uint8 *pMusicData, uint16 startOfData);
+	~AdLibChannel() override;
+	uint8 process(uint16 aktTime) override;
+	void updateVolume(uint16 pVolume) override;
+	bool isActive() override;
+private:
+	OPL::OPL *_opl;
+	uint8 *_musicData;
+	uint16 _musicVolume;
+	AdLibChannelType _channelData;
+
+	InstrumentStruct *_instruments;
+	uint16 *_frequenceTable;
+	uint8 *_instrumentMap;
+	uint8 *_registerTable, *_opOutputTable;
+	uint8 *_adlibRegMirror;
+
+	// normal subs
+	void setRegister(uint8 regNum, uint8 value);
+	int32 getNextEventTime();
+	uint16 getNextNote(uint8 param);
+	void adlibSetupInstrument();
+	void setupInstrument(uint8 opcode);
+	void setupChannelVolume(uint8 volume);
+	void stopNote();
+
+	// 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_getFreqOffset();     // 5
+	void com90_getChannelVolume();  // 6
+	void com90_getTremoVibro();     // 7
+	void com90_loopMusic();         // 8
+	void com90_keyOff();            // 9
+	//void com90_error();           // 10
+	//void com90_doLodsb();         // 11
+	void com90_setLoopPoint();      // 12
+	//void com90_do_two_Lodsb();    // 13
+};
+
+} // End of namespace Sky
+
+#endif //ADLIBCHANNEL_H