Sap_Emu.h
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Sap_Emu.h
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	// Atari XL/XE SAP music file emulator

	// Game_Music_Emu 0.5.5
	#ifndef SAP_EMU_H
	#define SAP_EMU_H

	#include "Classic_Emu.h"
	#include "Sap_Apu.h"
	#include "Sap_Cpu.h"

	class Sap_Emu : private Sap_Cpu, public Classic_Emu {
	typedef Sap_Cpu cpu;
	public:
	static gme_type_t static_type() { return gme_sap_type; }
	public:
	Sap_Emu();
	~Sap_Emu();
	struct info_t {
	byte const* rom_data;
	const char* warning;
	long init_addr;
	long play_addr;
	long music_addr;
	int type;
	int track_count;
	int fastplay;
	bool stereo;
	char author [256];
	char name [256];
	char copyright [ 32];
	};
	protected:
	blargg_err_t track_info_( track_info_t*, int track ) const;
	blargg_err_t load_mem_( byte const*, long );
	blargg_err_t start_track_( int );
	blargg_err_t run_clocks( blip_time_t&, int );
	void set_tempo_( double );
	void set_voice( int, Blip_Buffer, Blip_Buffer, Blip_Buffer* );
	void update_eq( blip_eq_t const& );
	public: private: friend class Sap_Cpu;
	int cpu_read( sap_addr_t );
	void cpu_write( sap_addr_t, int );
	void cpu_write_( sap_addr_t, int );
	private:
	info_t info;

	byte const* file_end;
	sap_time_t scanline_period;
	sap_time_t next_play;
	sap_time_t time_mask;
	Sap_Apu apu;
	Sap_Apu apu2;

	// large items
	struct {
	byte padding1 [0x100];
	byte ram [0x10000];
	byte padding2 [0x100];
	} mem;
	Sap_Apu_Impl apu_impl;

	sap_time_t play_period() const;
	void call_play();
	void cpu_jsr( sap_addr_t );
	void call_init( int track );
	void run_routine( sap_addr_t );
	};

	#endif