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/* ScummVM - Scumm Interpreter
* Copyright (C) 2003-2005 The ScummVM project
*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* $Header$
*
*/
#ifndef SKYGMCHANNEL_H
#define SKYGMCHANNEL_H
#include "sky/music/musicbase.h"
class MidiDriver;
namespace Sky {
typedef struct {
uint16 eventDataPtr;
int32 nextEventTime;
uint16 startOfData;
uint8 midiChannelNumber;
uint8 note;
uint8 channelActive;
} MidiChannelType;
class GmChannel : public ChannelBase {
public:
GmChannel(uint8 *pMusicData, uint16 startOfData, MidiDriver *pMidiDrv, const byte *pInstMap, const byte *veloTab);
virtual void stopNote(void);
virtual uint8 process(uint16 aktTime);
virtual void updateVolume(uint16 pVolume);
virtual bool isActive(void);
private:
const byte *_instMap;
const byte *_veloTab;
MidiDriver *_midiDrv;
uint8 *_musicData;
uint16 _musicVolume;
MidiChannelType _channelData;
uint8 _lastVolume;
//- normal subs
void setRegister(uint8 regNum, uint8 value);
int32 getNextEventTime(void);
uint16 getNextNote(uint8 param);
void adlibSetupInstrument(void);
void setupInstrument(uint8 opcode);
void setupChannelVolume(uint8 volume);
//- Streamfunctions from Command90hTable
void com90_caseNoteOff(void); // 0
void com90_stopChannel(void); // 1
void com90_setupInstrument(void); // 2
uint8 com90_updateTempo(void); // 3
//void com90_dummy(void); // 4
void com90_getPitch(void); // 5
void com90_getChannelVolume(void); // 6
//void com90_skipTremoVibro(void); // 7
void com90_rewindMusic(void); // 8
void com90_keyOff(void); // 9
//void com90_error(void); // 10
void com90_getChannelPanValue(void); // 11
void com90_setStartOfData(void); // 12
void com90_getChannelControl(void); // 13
};
} // End of namespace Sky
#endif //SKYGMCHANNEL_H
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