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adlibchannel.h

/* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/sky/music/adlibchannel.h,v 1.11.2.1 2005/10/18 02:11:26 sev Exp $
 *
 */

#ifndef ADLIBCHANNEL_H
#define ADLIBCHANNEL_H

#include "sky/music/musicbase.h"
#include "sound/fmopl.h"

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 startOfData;
      uint8 adlibChannelNumber;
      uint8 lastCommand;
      uint8 channelActive;
      uint8 note;
      uint8 adlibReg1, adlibReg2;
      InstrumentStruct *instrumentData;
      uint8 assignedInstrument;
      uint8 channelVolume;
      uint8 padding; // field_12 / not used by original driver
      uint8 tremoVibro;
      uint8 freqDataSize;
      uint8 freqOffset;
      uint16 frequency;
} AdlibChannelType;

class AdlibChannel : public ChannelBase {
public:
      AdlibChannel (FM_OPL *opl, uint8 *pMusicData, uint16 startOfData);
      virtual void stopNote(void);
      virtual uint8 process(uint16 aktTime);
      virtual void updateVolume(uint16 pVolume);
      virtual bool isActive(void);
private:
      FM_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(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_getFreqOffset(void);     // 5
      void com90_getChannelVolume(void);  // 6
      void com90_getTremoVibro(void);     // 7
      void com90_rewindMusic(void);       // 8
      void com90_keyOff(void);            // 9
      //void com90_error(void);           // 10
      //void com90_doLodsb(void);         // 11
      void com90_setStartOfData(void);    // 12
      //void com90_do_two_Lodsb(void);    // 13
};

} // End of namespace Sky

#endif //ADLIBCHANNEL_H

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