Initial Atari Lynx Support

src/engine/platform/lynx.h

@@ -0,0 +1,74 @@
+#ifndef _LYNX_H
+#define _LYNX_H
+
+#include "../dispatch.h"
+#include "../macroInt.h"
+#include "sound/lynx/Mikey.hpp"
+
+class DivPlatformLynx: public DivDispatch {
+
+  struct MikeyFreqDiv {
+    uint8_t clockDivider;
+    uint8_t backup;
+
+    MikeyFreqDiv(int frequency);
+  };
+
+  struct MikeyDuty {
+    uint8_t int_feedback7;
+    uint8_t feedback;
+
+    MikeyDuty(int duty);
+  };
+
+  struct Channel {
+    MikeyFreqDiv fd;
+    MikeyDuty duty;
+    int baseFreq, pitch, note, actualNote;
+    unsigned char ins;
+    bool active, insChanged, freqChanged, keyOn, keyOff, inPorta, resetLFSR;
+    signed char vol, outVol;
+    DivMacroInt std;
+    Channel():
+      fd(0),
+      duty(0),
+      baseFreq(0),
+      pitch(0),
+      note(0),
+      actualNote(0),
+      ins(-1),
+      active(false),
+      insChanged(true),
+      freqChanged(false),
+      keyOn(false),
+      keyOff(false),
+      inPorta(false),
+      resetLFSR(false),
+      vol(127),
+      outVol(127) {}
+  };
+  Channel chan[4];
+  bool isMuted[4];
+  std::unique_ptr<Lynx::Mikey> mikey;
+  friend void putDispatchChan(void*,int,int);
+  public:
+    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 notifyInsDeletion(void* ins);
+    void poke(unsigned int addr, unsigned short val);
+    void poke(std::vector<DivRegWrite>& wlist);
+    const char** getRegisterSheet();
+    int init(DivEngine* parent, int channels, int sugRate, unsigned int flags);
+    void quit();
+    ~DivPlatformLynx();
+};
+
+#endif