/gme/Vgm_Emu_Impl.h

http://game-music-emu.googlecode.com/ · C++ Header · 71 lines · 55 code · 14 blank · 2 comment · 1 complexity · fa7cea56f8a93f4b4e8878031176e659 MD5 · raw file 

    

  1. // Low-level parts of Vgm_Emu
    2. 

  2. 

  3. // Game_Music_Emu 0.5.5
    4. 

  4. #ifndef VGM_EMU_IMPL_H
    5. 

  5. #define VGM_EMU_IMPL_H
    6. 

  6. 

  7. #include "Dual_Resampler.h"
    8. 

  8. #include "Classic_Emu.h"
    9. 

  9. #include "Ym2413_Emu.h"
    10. 

  10. #include "Ym2612_Emu.h"
    11. 

  11. #include "Sms_Apu.h"
    12. 

  12. 

  13. template<class Emu>
    14. 

  14. class Ym_Emu : public Emu {
    15. 

  15. protected:
    16. 

  16. 	int last_time;
    17. 

  17. 	short* out;
    18. 

  18. 	enum { disabled_time = -1 };
    19. 

  19. public:
    20. 

  20. 	Ym_Emu()                        : last_time( disabled_time ), out( NULL ) { }
    21. 

  21. 	void enable( bool b )           { last_time = b ? 0 : disabled_time; }
    22. 

  22. 	bool enabled() const            { return last_time != disabled_time; }
    23. 

  23. 	void begin_frame( short* p );
    24. 

  24. 	int run_until( int time );
    25. 

  25. };
    26. 

  26. 

  27. class Vgm_Emu_Impl : public Classic_Emu, private Dual_Resampler {
    28. 

  28. public:
    29. 

  29. 	typedef Classic_Emu::sample_t sample_t;
    30. 

  30. protected:
    31. 

  31. 	enum { stereo = 2 };
    32. 

  32. 	
    33. 

  33. 	typedef int vgm_time_t;
    34. 

  34. 	
    35. 

  35. 	enum { fm_time_bits = 12 };
    36. 

  36. 	typedef int fm_time_t;
    37. 

  37. 	long fm_time_offset;
    38. 

  38. 	int fm_time_factor;
    39. 

  39. 	fm_time_t to_fm_time( vgm_time_t ) const;
    40. 

  40. 	
    41. 

  41. 	enum { blip_time_bits = 12 };
    42. 

  42. 	int blip_time_factor;
    43. 

  43. 	blip_time_t to_blip_time( vgm_time_t ) const;
    44. 

  44. 	
    45. 

  45. 	byte const* data;
    46. 

  46. 	byte const* loop_begin;
    47. 

  47. 	byte const* data_end;
    48. 

  48. 	void update_fm_rates( long* ym2413_rate, long* ym2612_rate ) const;
    49. 

  49. 	
    50. 

  50. 	vgm_time_t vgm_time;
    51. 

  51. 	byte const* pos;
    52. 

  52. 	blip_time_t run_commands( vgm_time_t );
    53. 

  53. 	int play_frame( blip_time_t blip_time, int sample_count, sample_t* buf );
    54. 

  54. 	
    55. 

  55. 	byte const* pcm_data;
    56. 

  56. 	byte const* pcm_pos;
    57. 

  57. 	int dac_amp;
    58. 

  58. 	int dac_disabled; // -1 if disabled
    59. 

  59. 	void write_pcm( vgm_time_t, int amp );
    60. 

  60. 	
    61. 

  61. 	Ym_Emu<Ym2612_Emu> ym2612;
    62. 

  62. 	Ym_Emu<Ym2413_Emu> ym2413;
    63. 

  63. 	
    64. 

  64. 	Blip_Buffer blip_buf;
    65. 

  65. 	Sms_Apu psg;
    66. 

  66. 	Blip_Synth<blip_med_quality,1> dac_synth;
    67. 

  67. 	
    68. 

  68. 	friend class Vgm_Emu;
    69. 

  69. };
    70. 

  70. 

  71. #endif
    72.