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