prepare for SAA1099

src/engine/platform/saa.h

@@ -0,0 +1,67 @@
+#ifndef _SAA_H
+#define _SAA_H
+#include "../dispatch.h"
+#include "../macroInt.h"
+#include <queue>
+#include "sound/saa1099.h"
+
+class DivPlatformSAA1099: public DivDispatch {
+  protected:
+    struct Channel {
+      unsigned char freqH, freqL;
+      int freq, baseFreq, pitch;
+      unsigned char ins, note, psgMode;
+      signed char konCycles;
+      bool active, insChanged, freqChanged, keyOn, keyOff, portaPause, inPorta;
+      int vol, outVol;
+      unsigned char pan;
+      DivMacroInt std;
+      Channel(): freqH(0), freqL(0), freq(0), baseFreq(0), pitch(0), ins(-1), note(0), psgMode(1), active(false), insChanged(true), freqChanged(false), keyOn(false), keyOff(false), portaPause(false), inPorta(false), vol(0), outVol(15), pan(3) {}
+    };
+    Channel chan[3];
+    bool isMuted[3];
+    struct QueuedWrite {
+      unsigned short addr;
+      unsigned char val;
+      bool addrOrVal;
+      QueuedWrite(unsigned short a, unsigned char v): addr(a), val(v), addrOrVal(false) {}
+    };
+    std::queue<QueuedWrite> writes;
+    saa1099_device saa;
+    unsigned char lastBusy;
+  
+    bool dacMode;
+    int dacPeriod;
+    int dacRate;
+    int dacPos;
+    int dacSample;
+    unsigned char sampleBank;
+
+    int delay;
+
+    bool extMode;
+  
+    short oldWrites[16];
+    short pendingWrites[16];
+    unsigned char ayEnvMode;
+    unsigned short ayEnvPeriod;
+    short ayEnvSlideLow;
+    short ayEnvSlide;
+    short* ayBuf[3];
+    size_t ayBufLen;
+  
+  public:
+    void acquire(short* bufL, short* bufR, size_t start, size_t len);
+    int dispatch(DivCommand c);
+    void reset();
+    void forceIns();
+    void tick();
+    void muteChannel(int ch, bool mute);
+    void setPAL(bool pal);
+    bool isStereo();
+    bool keyOffAffectsArp(int ch);
+    void notifyInsDeletion(void* ins);
+    int init(DivEngine* parent, int channels, int sugRate, bool pal);
+    void quit();
+};
+#endif