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gmchannel.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2003-2004 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: /cvsroot/scummvm/scummvm/sky/music/gmchannel.h,v 1.10 2004/01/06 12:45:33 fingolfin Exp $
 *
 */

#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, byte *pInstMap, uint8 *veloTab);
      virtual void stopNote(void);
      virtual uint8 process(uint16 aktTime);
      virtual void updateVolume(uint16 pVolume);
      virtual bool isActive(void);
private:
      byte *_mt32_to_gm;
      uint8 *_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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