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Vgm_Emu_Impl.h
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Vgm_Emu_Impl.h
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// Low-level parts of Vgm_Emu
// Game_Music_Emu 0.5.5
#ifndef VGM_EMU_IMPL_H
#define VGM_EMU_IMPL_H
#include "Dual_Resampler.h"
#include "Classic_Emu.h"
#include "Ym2413_Emu.h"
#include "Ym2612_Emu.h"
#include "Sms_Apu.h"
template<class Emu>
class Ym_Emu : public Emu {
protected:
int last_time;
short* out;
enum { disabled_time = -1 };
public:
Ym_Emu() : last_time( disabled_time ), out( NULL ) { }
void enable( bool b ) { last_time = b ? 0 : disabled_time; }
bool enabled() const { return last_time != disabled_time; }
void begin_frame( short* p );
int run_until( int time );
};
class Vgm_Emu_Impl : public Classic_Emu, private Dual_Resampler {
public:
typedef Classic_Emu::sample_t sample_t;
protected:
enum { stereo = 2 };
typedef int vgm_time_t;
enum { fm_time_bits = 12 };
typedef int fm_time_t;
long fm_time_offset;
int fm_time_factor;
fm_time_t to_fm_time( vgm_time_t ) const;
enum { blip_time_bits = 12 };
int blip_time_factor;
blip_time_t to_blip_time( vgm_time_t ) const;
byte const* data;
byte const* loop_begin;
byte const* data_end;
void update_fm_rates( long* ym2413_rate, long* ym2612_rate ) const;
vgm_time_t vgm_time;
byte const* pos;
blip_time_t run_commands( vgm_time_t );
int play_frame( blip_time_t blip_time, int sample_count, sample_t* buf );
byte const* pcm_data;
byte const* pcm_pos;
int dac_amp;
int dac_disabled; // -1 if disabled
void write_pcm( vgm_time_t, int amp );
Ym_Emu<Ym2612_Emu> ym2612;
Ym_Emu<Ym2413_Emu> ym2413;
Blip_Buffer blip_buf;
Sms_Apu psg;
Blip_Synth<blip_med_quality,1> dac_synth;
friend class Vgm_Emu;
};
#endif

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