/*************************************************************************/ /* reverb.h */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */ /* */ /* Permission is hereby granted, free of charge, to any person obtaining */ /* a copy of this software and associated documentation files (the */ /* "Software"), to deal in the Software without restriction, including */ /* without limitation the rights to use, copy, modify, merge, publish, */ /* distribute, sublicense, and/or sell copies of the Software, and to */ /* permit persons to whom the Software is furnished to do so, subject to */ /* the following conditions: */ /* */ /* The above copyright notice and this permission notice shall be */ /* included in all copies or substantial portions of the Software. */ /* */ /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/ /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ /*************************************************************************/ // Author: Juan Linietsky <reduzio@gmail.com>, (C) 2006 #ifndef REVERB_H #define REVERB_H #include "core/math/audio_frame.h" #include "core/os/memory.h" #include "core/typedefs.h" class Reverb { public: enum { INPUT_BUFFER_MAX_SIZE = 1024, }; private: enum { MAX_COMBS = 8, MAX_ALLPASS = 4, MAX_ECHO_MS = 500 }; static const float comb_tunings[MAX_COMBS]; static const float allpass_tunings[MAX_ALLPASS]; struct Comb { int size; float *buffer; float feedback; float damp; //lowpass float damp_h; //history int pos; int extra_spread_frames; Comb() { size = 0; buffer = nullptr; feedback = 0; damp_h = 0; pos = 0; } }; struct AllPass { int size; float *buffer; int pos; int extra_spread_frames; AllPass() { size = 0; buffer = nullptr; pos = 0; } }; Comb comb[MAX_COMBS]; AllPass allpass[MAX_ALLPASS]; float *input_buffer; float *echo_buffer; int echo_buffer_size; int echo_buffer_pos; float hpf_h1, hpf_h2; struct Parameters { float room_size; float damp; float wet; float dry; float mix_rate; float extra_spread_base; float extra_spread; float predelay; float predelay_fb; float hpf; } params; void configure_buffers(); void update_parameters(); void clear_buffers(); public: void set_room_size(float p_size); void set_damp(float p_damp); void set_wet(float p_wet); void set_dry(float p_dry); void set_predelay(float p_predelay); // in ms void set_predelay_feedback(float p_predelay_fb); // in ms void set_highpass(float p_frq); void set_mix_rate(float p_mix_rate); void set_extra_spread(float p_spread); void set_extra_spread_base(float p_sec); void process(float *p_src, float *p_dst, int p_frames); Reverb(); ~Reverb(); }; #endif