gbaapu.h

一个任天堂掌上游戏机NDS的源代码

/**************************************************************************
* DSemu - The Next Generation                                             *
* GBA PortAudio-emulated APU: Class definition [gbaapu.h]                 *
* Copyright Imran Nazar, 2005; released under the BSD public licence.     *
* PortAudio used under the BSD license.                                   *
**************************************************************************/

#include "portaudio.h"
#include "defs.h"
#include "plgapu.h"
#include "plgmmu32.h"
#include "plggui.h"
#include "plgcpu.h"
#include "datadefs.h"

// An implementation of the APU plugin interface.
class gbaAPU : public APUPlugin
{
    public:
        gbaAPU(std::string, REQPTR, UNREQPTR);
	~gbaAPU();

        PLUGININFO *getinfo();
	void reset();
	void release();
	void status(int,int);

	void togglePause();
	
    private:
        //---Plugin-generic stuff
        std::string pName, pClass;
        REQPTR pRequest;
        UNREQPTR pUnrequest;
	static PLUGININFO pInfo;
       
        static std::string pluginName;

	//---Start of stuff we're using
	static MMU32Plugin *MMU;
	static GUIPlugin *GUI;
	static gbaAPU *cls;

	// Definition of an I/O register
	typedef struct {
            union {
                u16 data;
	        u8 b[2];
            };
            u16 flags;
        } IOREG;
			    
	static IOREG reg[0x28];
	static int rflags[0x28];
	static int paused;

        static s16 SinT[4096];
	
	static u8  rdB(u32);
	static u16 rdH(u32);
	static u32 rdW(u32);
	static void wrB(u32,u8), wrH(u32,u16), wrW(u32,u32);

        static void fillDMG();
	static int dump(void*,void*,unsigned long,PaTimestamp,void*);
	inline void dumpDMG(void*,void*,unsigned long,PaTimestamp);
	
	static uint64_t tsStart, tsEnd;
	static int dmgChanged[4];
	static PortAudioStream *paStream;
	
	static u16 *ch2buf, *ch2outbuf;
	static int ch2out;
	
};

// I/O registers that the APU will be indexing
#define REG_SND1CNT_L 0x00
#define REG_SND1CNT_H 0x01
#define REG_SND1CNT_X 0x02
#define REG_SND2CNT_L 0x04
#define REG_SND2CNT_H 0x06
#define REG_SND3CNT_L 0x08
#define REG_SND3CNT_H 0x09
#define REG_SND3CNT_X 0x0A
#define REG_SND4CNT_L 0x0C
#define REG_SND4CNT_H 0x0E
#define REG_SNDCNT_L  0x10
#define REG_SNDCNT_H  0x11
#define REG_SNDCNT_X  0x12
#define REG_WAVERAM   0x18
#define REG_FIFO_A_L  0x20
#define REG_FIFO_A_H  0x21
#define REG_FIFO_B_L  0x22
#define REG_FIFO_B_H  0x23

/*** EOF: gbaapu.h *******************************************************/