72 lines
1.4 KiB
C++
72 lines
1.4 KiB
C++
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// Konami VRC7 sound chip emulator
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// Nes_Snd_Emu 0.1.7. Copyright (C) 2003-2005 Shay Green. GNU LGPL license.
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#ifndef NES_VRC7_H
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#define NES_VRC7_H
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#include "emu2413_state.h"
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struct vrc7_snapshot_t;
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class Nes_Vrc7 {
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public:
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Nes_Vrc7();
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~Nes_Vrc7();
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// See Nes_Apu.h for reference
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void reset();
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void volume( double );
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void treble_eq( blip_eq_t const& );
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void output( Blip_Buffer* );
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enum { osc_count = 6 };
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void osc_output( int index, Blip_Buffer* );
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void end_frame( nes_time_t );
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void save_snapshot(vrc7_snapshot_t*);
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void load_snapshot(vrc7_snapshot_t &, int dataSize);
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void update_last_amp();
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void write_reg( int reg );
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void write_data( nes_time_t, int data );
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private:
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// noncopyable
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Nes_Vrc7( const Nes_Vrc7& );
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Nes_Vrc7& operator = ( const Nes_Vrc7& );
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struct Vrc7_Osc
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{
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uint8_t regs [3];
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Blip_Buffer* output;
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int last_amp;
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};
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void * opll;
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nes_time_t last_time;
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Blip_Synth<blip_med_quality,2048*2> synth; // DB2LIN_AMP_BITS == 11, * 2
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int count;
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Vrc7_Osc oscs [osc_count];
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void run_until( nes_time_t );
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};
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struct vrc7_snapshot_t
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{
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uint8_t latch;
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uint8_t inst [8];
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uint8_t regs [6] [3];
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uint8_t count;
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int internal_opl_state_size;
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OPLL_STATE internal_opl_state;
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};
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BOOST_STATIC_ASSERT( sizeof (vrc7_snapshot_t) == 28 + 440 + 4 );
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inline void Nes_Vrc7::osc_output( int i, Blip_Buffer* buf )
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{
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oscs [i].output = buf;
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}
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#endif
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