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718112a8fe
Currently none of these is being used, but eventually they will, once more code gets ported over. So it's better to have them right away and avoid editing the project file too much, only to revert that later.
106 lines
2.4 KiB
C++
106 lines
2.4 KiB
C++
// Nintendo NES/Famicom NSF music file emulator
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// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
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#ifndef NSF_EMU_H
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#define NSF_EMU_H
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#include "Classic_Emu.h"
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#include "Nes_Apu.h"
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#include "Nes_Cpu.h"
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class Nsf_Emu : private Nes_Cpu, public Classic_Emu {
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typedef Nes_Cpu cpu;
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public:
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// Equalizer profiles for US NES and Japanese Famicom
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static equalizer_t const nes_eq;
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static equalizer_t const famicom_eq;
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// NSF file header
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enum { header_size = 0x80 };
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struct header_t
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{
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char tag [5];
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byte vers;
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byte track_count;
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byte first_track;
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byte load_addr [2];
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byte init_addr [2];
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byte play_addr [2];
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char game [32];
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char author [32];
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char copyright [32];
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byte ntsc_speed [2];
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byte banks [8];
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byte pal_speed [2];
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byte speed_flags;
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byte chip_flags;
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byte unused [4];
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};
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// Header for currently loaded file
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header_t const& header() const { return header_; }
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static gme_type_t static_type() { return gme_nsf_type; }
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public:
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// deprecated
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using Music_Emu::load;
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blargg_err_t load( header_t const& h, Data_Reader& in ) // use Remaining_Reader
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{ return load_remaining_( &h, sizeof h, in ); }
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public:
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Nsf_Emu();
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~Nsf_Emu();
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Nes_Apu* apu_() { return &apu; }
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protected:
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blargg_err_t track_info_( track_info_t*, int track ) const;
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blargg_err_t load_( Data_Reader& );
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blargg_err_t start_track_( int );
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blargg_err_t run_clocks( blip_time_t&, int );
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void set_tempo_( double );
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void set_voice( int, Blip_Buffer*, Blip_Buffer*, Blip_Buffer* );
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void update_eq( blip_eq_t const& );
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void unload();
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protected:
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enum { bank_count = 8 };
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byte initial_banks [bank_count];
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nes_addr_t init_addr;
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nes_addr_t play_addr;
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double clock_rate_;
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bool pal_only;
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// timing
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Nes_Cpu::registers_t saved_state;
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nes_time_t next_play;
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nes_time_t play_period;
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int play_extra;
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int play_ready;
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enum { rom_begin = 0x8000 };
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enum { bank_select_addr = 0x5FF8 };
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enum { bank_size = 0x1000 };
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Rom_Data<bank_size> rom;
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public: private: friend class Nes_Cpu;
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void cpu_jsr( nes_addr_t );
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int cpu_read( nes_addr_t );
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void cpu_write( nes_addr_t, int );
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void cpu_write_misc( nes_addr_t, int );
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enum { badop_addr = bank_select_addr };
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private:
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class Nes_Namco_Apu* namco;
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class Nes_Vrc6_Apu* vrc6;
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class Nes_Fme7_Apu* fme7;
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Nes_Apu apu;
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static int pcm_read( void*, nes_addr_t );
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blargg_err_t init_sound();
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header_t header_;
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enum { sram_addr = 0x6000 };
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byte sram [0x2000];
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byte unmapped_code [Nes_Cpu::page_size + 8];
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};
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#endif
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