furnace/src/engine/platform/sms.h
tildearrow 237ad1f517 SMS: possibly fix noise pitch issue
hoping this causes no regressions. fixes #56
2022-01-30 17:10:15 -05:00

56 lines
1.3 KiB
C++

#ifndef _SMS_H
#define _SMS_H
#include "../dispatch.h"
#include "../macroInt.h"
#include "sound/sn76496.h"
class DivPlatformSMS: public DivDispatch {
struct Channel {
int freq, baseFreq, pitch, note, actualNote;
unsigned char ins;
bool active, insChanged, freqChanged, keyOn, keyOff;
signed char vol, outVol;
DivMacroInt std;
Channel():
freq(0),
baseFreq(0),
pitch(0),
note(0),
actualNote(0),
ins(-1),
active(false),
insChanged(true),
freqChanged(false),
keyOn(false),
keyOff(false),
vol(15),
outVol(15) {}
};
Channel chan[4];
bool isMuted[4];
unsigned char snNoiseMode;
bool updateSNMode;
bool isRealSN;
sn76496_base_device* sn;
friend void putDispatchChan(void*,int,int);
public:
int acquireOne();
void acquire(short* bufL, short* bufR, size_t start, size_t len);
int dispatch(DivCommand c);
void* getChanState(int chan);
void reset();
void forceIns();
void tick();
void muteChannel(int ch, bool mute);
bool keyOffAffectsArp(int ch);
bool keyOffAffectsPorta(int ch);
int getPortaFloor(int ch);
void setFlags(unsigned int flags);
void notifyInsDeletion(void* ins);
int init(DivEngine* parent, int channels, int sugRate, unsigned int flags);
void quit();
~DivPlatformSMS();
};
#endif