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// license:BSD-3-Clause
// copyright-holders:Peter Trauner
#ifndef MAME_SOUND_SID_H
#define MAME_SOUND_SID_H
#pragma once
/*
approximation of the sid6581 chip
this part is for one chip,
*/
#include "sidvoice.h"
/* private area */
struct SID6581_t
{
static constexpr uint8_t max_voices = 3;
device_t *device = nullptr;
sound_stream *mixer_channel = nullptr; // mame stream/ mixer channel
int type = 0;
uint32_t clock = 0;
uint16_t PCMfreq = 0; // samplerate of the current systems soundcard/DAC
uint32_t PCMsid = 0, PCMsidNoise = 0;
#if 0
/* following depends on type */
ptr2sidVoidFunc ModeNormalTable[16]{ nullptr };
ptr2sidVoidFunc ModeRingTable[16]{ nullptr };
// for speed reason it could be better to make them global!
uint8_t *waveform30 = nullptr;
uint8_t *waveform50 = nullptr;
uint8_t *waveform60 = nullptr;
uint8_t *waveform70 = nullptr;
#endif
int reg[0x20]{ 0 };
// bool sidKeysOn[0x20]{ false }, sidKeysOff[0x20]{ false };
uint8_t masterVolume = 0;
uint16_t masterVolumeAmplIndex = 0;
struct
{
int Enabled = 0;
uint8_t Type = 0, CurType = 0;
float Dy = 0.0, ResDy = 0.0;
uint16_t Value = 0;
} filter;
sidOperator optr[max_voices];
int optr3_outputmask = 0;
void init();
bool reset();
void postload();
int port_r(running_machine &machine, int offset);
void port_w(int offset, int data);
void fill_buffer(write_stream_view &buffer);
private:
void syncEm();
};
#endif // MAME_SOUND_SID_H
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