1 // Low-level parts of Vgm_Emu 2 3 // Game_Music_Emu 0.6.0 4 #ifndef VGM_EMU_IMPL_H 5 #define VGM_EMU_IMPL_H 6 7 #include "Dual_Resampler.h" 8 #include "Classic_Emu.h" 9 #include "Ym2413_Emu.h" 10 #include "Ym2612_Emu.h" 11 #include "Sms_Apu.h" 12 13 template<class Emu> 14 class Ym_Emu : public Emu { 15 protected: 16 int last_time; 17 short* out; 18 enum { disabled_time = -1 }; 19 public: Ym_Emu()20 Ym_Emu() : last_time( disabled_time ), out( NULL ) { } enable(bool b)21 void enable( bool b ) { last_time = b ? 0 : disabled_time; } enabled()22 bool enabled() const { return last_time != disabled_time; } 23 void begin_frame( short* p ); 24 int run_until( int time ); 25 }; 26 27 class Vgm_Emu_Impl : public Classic_Emu, private Dual_Resampler { 28 public: 29 typedef Classic_Emu::sample_t sample_t; 30 protected: 31 enum { stereo = 2 }; 32 33 typedef int vgm_time_t; 34 35 enum { fm_time_bits = 12 }; 36 typedef int fm_time_t; 37 long fm_time_offset; 38 int fm_time_factor; 39 fm_time_t to_fm_time( vgm_time_t ) const; 40 41 enum { blip_time_bits = 12 }; 42 int blip_time_factor; 43 blip_time_t to_blip_time( vgm_time_t ) const; 44 45 byte const* data; 46 byte const* loop_begin; 47 byte const* data_end; 48 void update_fm_rates( long* ym2413_rate, long* ym2612_rate ) const; 49 50 vgm_time_t vgm_time; 51 byte const* pos; 52 blip_time_t run_commands( vgm_time_t ); 53 int play_frame( blip_time_t blip_time, int sample_count, sample_t* buf ); 54 55 byte const* pcm_data; 56 byte const* pcm_pos; 57 int dac_amp; 58 int dac_disabled; // -1 if disabled 59 void write_pcm( vgm_time_t, int amp ); 60 61 Ym_Emu<Ym2612_Emu> ym2612; 62 Ym_Emu<Ym2413_Emu> ym2413; 63 64 Blip_Buffer blip_buf; 65 Sms_Apu psg; 66 Blip_Synth<blip_med_quality,1> dac_synth; 67 68 friend class Vgm_Emu; 69 }; 70 71 #endif 72