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Diffstat (limited to 'gme/Effects_Buffer.h')
-rw-r--r-- | gme/Effects_Buffer.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/gme/Effects_Buffer.h b/gme/Effects_Buffer.h new file mode 100644 index 00000000..eb0aa67a --- /dev/null +++ b/gme/Effects_Buffer.h @@ -0,0 +1,86 @@ +// Multi-channel effects buffer with panning, echo and reverb + +// Game_Music_Emu 0.5.2 +#ifndef EFFECTS_BUFFER_H +#define EFFECTS_BUFFER_H + +#include "Multi_Buffer.h" + +// Effects_Buffer uses several buffers and outputs stereo sample pairs. +class Effects_Buffer : public Multi_Buffer { +public: + // If center_only is true, only center buffers are created and + // less memory is used. + Effects_Buffer( bool center_only = false ); + + // Channel Effect Center Pan + // --------------------------------- + // 0,5 reverb pan_1 + // 1,6 reverb pan_2 + // 2,7 echo - + // 3 echo - + // 4 echo - + + // Channel configuration + struct config_t { + double pan_1; // -1.0 = left, 0.0 = center, 1.0 = right + double pan_2; + double echo_delay; // msec + double echo_level; // 0.0 to 1.0 + double reverb_delay; // msec + double delay_variance; // difference between left/right delays (msec) + double reverb_level; // 0.0 to 1.0 + bool effects_enabled; // if false, use optimized simple mixer + config_t(); + }; + + // Set configuration of buffer + virtual void config( const config_t& ); + void set_depth( double ); + +public: + ~Effects_Buffer(); + blargg_err_t set_sample_rate( long samples_per_sec, int msec = blip_default_length ); + void clock_rate( long ); + void bass_freq( int ); + void clear(); + channel_t channel( int, int ); + void end_frame( blip_time_t ); + long read_samples( blip_sample_t*, long ); + long samples_avail() const; +private: + typedef long fixed_t; + + enum { max_buf_count = 7 }; + Blip_Buffer bufs [max_buf_count]; + enum { chan_types_count = 3 }; + channel_t chan_types [3]; + config_t config_; + long stereo_remain; + long effect_remain; + int buf_count; + bool effects_enabled; + + blargg_vector<blip_sample_t> reverb_buf; + blargg_vector<blip_sample_t> echo_buf; + int reverb_pos; + int echo_pos; + + struct { + fixed_t pan_1_levels [2]; + fixed_t pan_2_levels [2]; + int echo_delay_l; + int echo_delay_r; + fixed_t echo_level; + int reverb_delay_l; + int reverb_delay_r; + fixed_t reverb_level; + } chans; + + void mix_mono( blip_sample_t*, blargg_long ); + void mix_stereo( blip_sample_t*, blargg_long ); + void mix_enhanced( blip_sample_t*, blargg_long ); + void mix_mono_enhanced( blip_sample_t*, blargg_long ); +}; + +#endif |