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// license:BSD-3-Clause
// copyright-holders:Peter Trauner
#pragma once
#ifndef __SIDVOICE_H__
#define __SIDVOICE_H__
/*
approximation of the sid6581 chip
this part is for 1 (of the 3) voices of a chip
*/
#include "sound/mos6581.h"
struct sw_storage
{
UINT16 len;
#if defined(DIRECT_FIXPOINT)
UINT32 stp;
#else
UINT32 pnt;
INT16 stp;
#endif
};
struct SID6581_t;
struct sidOperator
{
SID6581_t *sid;
UINT8 reg[7];
UINT32 SIDfreq;
UINT16 SIDpulseWidth;
UINT8 SIDctrl;
UINT8 SIDAD, SIDSR;
sidOperator* carrier;
sidOperator* modulator;
int sync;
UINT16 pulseIndex, newPulseIndex;
UINT16 curSIDfreq;
UINT16 curNoiseFreq;
UINT8 output;//, outputMask;
char filtVoiceMask;
int filtEnabled;
float filtLow, filtRef;
INT8 filtIO;
INT32 cycleLenCount;
#if defined(DIRECT_FIXPOINT)
cpuLword cycleLen, cycleAddLen;
#else
UINT32 cycleAddLenPnt;
UINT16 cycleLen, cycleLenPnt;
#endif
INT8(*outProc)(sidOperator *);
void(*waveProc)(sidOperator *);
#if defined(DIRECT_FIXPOINT)
cpuLword waveStep, waveStepAdd;
#else
UINT16 waveStep, waveStepAdd;
UINT32 waveStepPnt, waveStepAddPnt;
#endif
UINT16 waveStepOld;
struct sw_storage wavePre[2];
#if defined(DIRECT_FIXPOINT) && defined(LARGE_NOISE_TABLE)
cpuLword noiseReg;
#elif defined(DIRECT_FIXPOINT)
cpuLBword noiseReg;
#else
UINT32 noiseReg;
#endif
UINT32 noiseStep, noiseStepAdd;
UINT8 noiseOutput;
int noiseIsLocked;
UINT8 ADSRctrl;
// int gateOnCtrl, gateOffCtrl;
UINT16 (*ADSRproc)(sidOperator *);
#ifdef SID_FPUENVE
float fenveStep, fenveStepAdd;
UINT32 enveStep;
#elif defined(DIRECT_FIXPOINT)
cpuLword enveStep, enveStepAdd;
#else
UINT16 enveStep, enveStepAdd;
UINT32 enveStepPnt, enveStepAddPnt;
#endif
UINT8 enveVol, enveSusVol;
UINT16 enveShortAttackCount;
};
typedef INT8 (*ptr2sidFunc)(sidOperator *);
typedef UINT16 (*ptr2sidUwordFunc)(sidOperator *);
typedef void (*ptr2sidVoidFunc)(sidOperator *);
void sidClearOperator( sidOperator* pVoice );
void sidEmuSet(sidOperator* pVoice);
void sidEmuSet2(sidOperator* pVoice);
INT8 sidWaveCalcNormal(sidOperator* pVoice);
void sidInitWaveformTables(int type);
void sidInitMixerEngine(running_machine &machine);
#if 0
extern ptr2sidVoidFunc sid6581ModeNormalTable[16];
extern ptr2sidVoidFunc sid6581ModeRingTable[16];
extern ptr2sidVoidFunc sid8580ModeNormalTable[16];
extern ptr2sidVoidFunc sid8580ModeRingTable[16];
#endif
#endif /* __SIDVOICE_H__ */
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