mirror of
https://github.com/libretro/px68k-libretro.git
synced 2026-11-07 04:25:57 -10:00
libretroadmin
3bb967da25
Some notes to consider: - consider this wip. some vars might not be necessary. - only for C68K cpu core - minimally tested. it works on HD files, and multi-disks but have not tested on anything that switches to another disk yet or drive letter. - M3U/CMD platlist format is necessary to keep track of what content the state is for (filename for .statex tracking for example). Switching disk or switching to another game through ingame menu will break currently loaded state. - in core is use to run in content-less mode, the savestate will be universal or system state (PX68K.state) and will not be based on what content is loaded. - MIDI: Loading patchsets and other midi params from a state file is not implemented. It may take a while to refresh instruments sets until next time MIDI sends new data. Its also required that only load a state after selecting the correct MIDI device from the ingame menu. - requires new px68k_libretro.info file, with savestate support enabled
97 lines
1.9 KiB
C++
97 lines
1.9 KiB
C++
// ---------------------------------------------------------------------------
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// OPM-like Sound Generator
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// Copyright (C) cisc 1998, 2003.
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// ---------------------------------------------------------------------------
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#ifndef FM_OPM_H
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#define FM_OPM_H
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#include <stdint.h>
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#include "fmgen.h"
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#include "fmtimer.h"
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#include "psg.h"
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namespace FM
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{
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// YM2151(OPM) ----------------------------------------------------
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class OPM : public Timer
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{
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public:
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OPM();
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virtual ~OPM() {}
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bool Init(uint32_t c, uint32_t r);
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bool SetRate(uint32_t c, uint32_t r);
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void Reset();
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void SetReg(uint32_t addr, uint32_t data);
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uint32_t GetReg(uint32_t addr);
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uint32_t ReadStatus() { return status & 0x03; }
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void Mix(int16_t* buffer, int nsamples, uint8_t* pbsp, uint8_t* pbep);
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void SetVolume(int db);
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void SetChannelMask(uint32_t mask);
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int StateAction(StateMem *sm, int load, int data_only);
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private:
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virtual void Intr(bool) {}
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private:
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enum
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{
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OPM_LFOENTS = 512,
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};
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void SetStatus(uint32_t bit);
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void ResetStatus(uint32_t bit);
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void SetParameter(uint32_t addr, uint32_t data);
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void TimerA();
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void RebuildTimeTable();
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void MixSub(int activech, ISample**);
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void MixSubL(int activech, ISample**);
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void LFO();
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uint32_t Noise();
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int fmvolume;
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uint32_t clock;
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uint32_t rate;
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uint32_t pmd;
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uint32_t amd;
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uint32_t lfocount;
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uint32_t lfodcount;
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uint32_t lfo_count_;
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uint32_t lfo_count_diff_;
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uint32_t lfo_step_;
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uint32_t lfo_count_prev_;
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uint32_t lfowaveform;
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uint32_t rateratio;
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uint32_t noise;
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int32_t noisecount;
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uint32_t noisedelta;
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uint8_t lfofreq;
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uint8_t status;
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uint8_t reg01;
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uint8_t kc[8];
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uint8_t kf[8];
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uint8_t pan[8];
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Channel4 ch[8];
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Chip chip;
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static void BuildLFOTable();
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static int amtable[4][OPM_LFOENTS];
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static int pmtable[4][OPM_LFOENTS];
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};
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}
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#endif // FM_OPM_H
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