prepare for Virtual Boy

src/engine/platform/vb.h

@@ -0,0 +1,121 @@
+/**
+ * Furnace Tracker - multi-system chiptune tracker
+ * Copyright (C) 2021-2022 tildearrow and contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _PLATFORM_VB_H
+#define _PLATFORM_VB_H
+
+#include "../dispatch.h"
+#include <queue>
+#include "../macroInt.h"
+#include "../waveSynth.h"
+#include "sound/vsu.h"
+
+class DivPlatformVB: public DivDispatch {
+  struct Channel {
+    int freq, baseFreq, pitch, pitch2, note, antiClickPeriodCount, antiClickWavePos;
+    int dacPeriod, dacRate, dacOut;
+    unsigned int dacPos;
+    int dacSample, ins;
+    unsigned char pan;
+    bool active, insChanged, freqChanged, keyOn, keyOff, inPorta, noise, pcm, furnaceDac, deferredWaveUpdate;
+    signed char vol, outVol, wave;
+    int macroVolMul;
+    DivMacroInt std;
+    DivWaveSynth ws;
+    void macroInit(DivInstrument* which) {
+      std.init(which);
+      pitch2=0;
+    }
+    Channel():
+      freq(0),
+      baseFreq(0),
+      pitch(0),
+      pitch2(0),
+      note(0),
+      antiClickPeriodCount(0),
+      antiClickWavePos(0),
+      dacPeriod(0),
+      dacRate(0),
+      dacOut(0),
+      dacPos(0),
+      dacSample(-1),
+      ins(-1),
+      pan(255),
+      active(false),
+      insChanged(true),
+      freqChanged(false),
+      keyOn(false),
+      keyOff(false),
+      inPorta(false),
+      noise(false),
+      pcm(false),
+      furnaceDac(false),
+      deferredWaveUpdate(false),
+      vol(31),
+      outVol(31),
+      wave(-1),
+      macroVolMul(31) {}
+  };
+  Channel chan[6];
+  DivDispatchOscBuffer* oscBuf[6];
+  bool isMuted[6];
+  bool antiClickEnabled;
+  struct QueuedWrite {
+      unsigned short addr;
+      unsigned char val;
+      QueuedWrite(unsigned short a, unsigned char v): addr(a), val(v) {}
+  };
+  std::queue<QueuedWrite> writes;
+  unsigned char lastPan;
+
+  int cycles, curChan, delay;
+  int tempL;
+  int tempR;
+  unsigned char sampleBank, lfoMode, lfoSpeed;
+  VSU* vb;
+  unsigned char regPool[0x600];
+  void updateWave(int ch);
+  friend void putDispatchChip(void*,int);
+  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);
+    DivMacroInt* getChanMacroInt(int ch);
+    DivDispatchOscBuffer* getOscBuffer(int chan);
+    unsigned char* getRegisterPool();
+    int getRegisterPoolSize();
+    void reset();
+    void forceIns();
+    void tick(bool sysTick=true);
+    void muteChannel(int ch, bool mute);
+    bool isStereo();
+    bool keyOffAffectsArp(int ch);
+    void setFlags(const DivConfig& flags);
+    void notifyWaveChange(int wave);
+    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, const DivConfig& flags);
+    void quit();
+    ~DivPlatformVB();
+};
+
+#endif