113 lines
1.9 KiB
C
113 lines
1.9 KiB
C
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#pragma once
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#include <stdint.h>
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#define SID_CLK 985248
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#define SID_CHA 3
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#define SID_OUT_SCALE (0x10000 * SID_CHA * 16)
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// TODO: prefix SID_
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// CONTROL
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#define GAT 0x01
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#define SYN 0x02
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#define RNG 0x04
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#define TST 0x08
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#define TRI 0x10
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#define SAW 0x20
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#define PUL 0x40
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#define NOI 0x80
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#define _HZ 0x10
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#define DECSUS 0x40
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#define ATK 0x80
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// TODO: change
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// filter mode (high)
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#define LP 0x10
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#define BP 0x20
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#define HP 0x40
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#define OFF3 0x80
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extern const int Aexp[256];
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struct SID_ctx_chan {
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double rcnt;
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double envcnt;
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double expcnt;
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double pacc;
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double pracc;
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int FSW;
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int nLFSR;
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double prevwfout;
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uint8_t pSR;
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int Ast;
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};
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struct SID_ctx {
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int sMSBrise;
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int sMSB;
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double plp;
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double pbp;
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struct SID_ctx_chan ch[3];
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};
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struct SIDVOICE {
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uint8_t freq_low;
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uint8_t freq_high;
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uint8_t pw_low;
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uint8_t pw_high : 4;
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uint8_t UNUSED : 4;
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uint8_t control;
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uint8_t decay : 4;
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uint8_t attack : 4;
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uint8_t susres;
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// uint8_t release : 4;
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// uint8_t sustain : 4;
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};
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struct SIDMEM {
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struct SIDVOICE v[SID_CHA];
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uint8_t UNUSED : 4;
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uint8_t cutoff_low : 4;
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uint8_t cutoff_high;
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uint8_t reso_rt : 4;
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uint8_t reso : 4;
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uint8_t volume : 4;
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uint8_t filter_mode : 4;
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uint8_t paddlex;
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uint8_t paddley;
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uint8_t osc3;
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uint8_t env3;
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};
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struct SID_globals {
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double ckr;
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double ctfr;
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double ctf_ratio_6581;
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int trsaw[4096];
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int pusaw[4096];
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int Pulsetrsaw[4096];
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double Aprd[16];
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int Astp[16];
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int model;
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};
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#define MemLen 65536
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struct SID_chip {
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struct SID_globals g;
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struct SID_ctx SIDct[3];
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uint8_t M[MemLen];
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int mute_mask;
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};
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extern struct SID_chip sid;
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double dSID_render();
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void dSID_init(double samplingRate, int model);
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float dSID_getVolume(int channel);
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void dSID_setMuteMask(int mute_mask);
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