Sap_Emu.h

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// Atari XL/XE SAP music file emulator
 
// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
#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