Ay_Emu.h

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// Sinclair Spectrum AY music file emulator
 
// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
#ifndef AY_EMU_H
#define AY_EMU_H
 
#include "Classic_Emu.h"
#include "Ay_Apu.h"
#include "Ay_Cpu.h"
 
class Ay_Emu : private Ay_Cpu, public Classic_Emu {
        typedef Ay_Cpu cpu;
public:
        // AY file header
        enum { header_size = 0x14 };
        struct header_t
        {
                byte tag [8];
                byte vers;
                byte player;
                byte unused [2];
                byte author [2];
                byte comment [2];
                byte max_track;
                byte first_track;
                byte track_info [2];
        };
        
        static gme_type_t static_type() { return gme_ay_type; }
public:
        Ay_Emu();
        ~Ay_Emu();
        struct file_t {
                header_t const* header;
                byte const* end;
                byte const* tracks;
        };
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& );
private:
        file_t file;
        
        cpu_time_t play_period;
        cpu_time_t next_play;
        Blip_Buffer* beeper_output;
        int beeper_delta;
        int last_beeper;
        int apu_addr;
        int cpc_latch;
        bool spectrum_mode;
        bool cpc_mode;
        
        // large items
        struct {
                byte padding1 [0x100];
                byte ram [0x10000 + 0x100];
        } mem;
        Ay_Apu apu;
        friend void ay_cpu_out( Ay_Cpu*, cpu_time_t, unsigned addr, int data );
        void cpu_out_misc( cpu_time_t, unsigned addr, int data );
};
 
#endif