samples.h

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//
// 1997/05/11 11:29:47
//

#ifndef __6581_SAMPLES_H
  #define __6581_SAMPLES_H


#include "mytypes.h"
#include "myendian.h"

class sidEmu;
class C6510;



struct sampleChannel
{
        bool Active;
        char Mode;
        ubyte Counter;  // Galway
        ubyte Repeat;
        ubyte Scale;
        ubyte SampleOrder;
        sbyte VolShift;
        
        uword Address;
        uword EndAddr;
        uword RepAddr;
        
        uword SamAddr;  // Galway
        uword SamLen;
        uword LoopWait;
        uword NullWait;
        
        uword Period;
#if defined(DIRECT_FIXPOINT) 
        cpuLword Period_stp;
        cpuLword Pos_stp;
        cpuLword PosAdd_stp;
#elif defined(PORTABLE_FIXPOINT)
        uword Period_stp, Period_pnt;
        uword Pos_stp, Pos_pnt;
        uword PosAdd_stp, PosAdd_pnt;
#else
        udword Period_stp;
        udword Pos_stp;
        udword PosAdd_stp;
#endif
};

class Mixer;



class Sample
        {

        friend Mixer;
        
enum
{
        FM_NONE,
        FM_GALWAYON,
        FM_GALWAYOFF,
        FM_HUELSON,
        FM_HUELSOFF
};
public:
        Sample(C6510* a6510);
        ~Sample();
        void sampleEmuInit(sidEmu* aTheSidEmu);
        void sampleEmuCheckForInit();
        void sampleEmuReset(sidEmu* aTheSidEmu);

private:
        void channelReset(sampleChannel& ch);
        inline void channelFree(sampleChannel& ch, const uword regBase);
        inline void channelTryInit(sampleChannel& ch, const uword regBase);
        inline ubyte channelProcess(sampleChannel& ch, const uword regBase);
        
        inline void sampleEmuTryStopAll();
        sbyte sampleEmuSilence();
        sbyte sampleEmu();
        sbyte sampleEmuTwo();

        void  GalwayInit();
        sbyte GalwayReturnSample();
        inline void GetNextFour();
//void SelectVolume(void); TODO

  private:
        udword sampleClock;
        sampleChannel ch4, ch5;
        ubyte galwayNoiseTab2[64*16];

        sbyte (Sample::*sampleEmuRout)(); 

        ubyte* c64mem1;       
        ubyte* c64mem2;       
        };


#endif // __6581_SAMPLES_H

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