mirror of
https://github.com/Relintai/pandemonium_engine.git
synced 2024-12-20 19:06:53 +01:00
233 lines
8.4 KiB
C++
233 lines
8.4 KiB
C++
/*************************************************************************/
|
|
/* audio_effect_compressor.cpp */
|
|
/*************************************************************************/
|
|
/* 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. */
|
|
/*************************************************************************/
|
|
|
|
#include "audio_effect_compressor.h"
|
|
#include "servers/audio_server.h"
|
|
|
|
void AudioEffectCompressorInstance::process(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) {
|
|
float threshold = Math::db2linear(base->threshold);
|
|
float sample_rate = AudioServer::get_singleton()->get_mix_rate();
|
|
|
|
float ratatcoef = exp(-1 / (0.00001f * sample_rate));
|
|
float ratrelcoef = exp(-1 / (0.5f * sample_rate));
|
|
float attime = base->attack_us / 1000000.0;
|
|
float reltime = base->release_ms / 1000.0;
|
|
float atcoef = exp(-1 / (attime * sample_rate));
|
|
float relcoef = exp(-1 / (reltime * sample_rate));
|
|
|
|
float makeup = Math::db2linear(base->gain);
|
|
|
|
float mix = base->mix;
|
|
float gr_meter_decay = exp(1 / (1 * sample_rate));
|
|
|
|
const AudioFrame *src = p_src_frames;
|
|
|
|
if (base->sidechain != StringName() && current_channel != -1) {
|
|
int bus = AudioServer::get_singleton()->thread_find_bus_index(base->sidechain);
|
|
if (bus >= 0) {
|
|
src = AudioServer::get_singleton()->thread_get_channel_mix_buffer(bus, current_channel);
|
|
}
|
|
}
|
|
|
|
for (int i = 0; i < p_frame_count; i++) {
|
|
AudioFrame s = src[i];
|
|
//convert to positive
|
|
s.l = Math::abs(s.l);
|
|
s.r = Math::abs(s.r);
|
|
|
|
float peak = MAX(s.l, s.r);
|
|
|
|
float overdb = 2.08136898f * Math::linear2db(peak / threshold);
|
|
|
|
if (overdb < 0.0) { //we only care about what goes over to compress
|
|
overdb = 0.0;
|
|
}
|
|
|
|
if (overdb - rundb > 5) { // diffeence is too large
|
|
averatio = 4;
|
|
}
|
|
|
|
if (overdb > rundb) {
|
|
rundb = overdb + atcoef * (rundb - overdb);
|
|
runratio = averatio + ratatcoef * (runratio - averatio);
|
|
} else {
|
|
rundb = overdb + relcoef * (rundb - overdb);
|
|
runratio = averatio + ratrelcoef * (runratio - averatio);
|
|
}
|
|
|
|
overdb = rundb;
|
|
averatio = runratio;
|
|
|
|
float cratio;
|
|
|
|
if (false) { //rato all-in
|
|
cratio = 12 + averatio;
|
|
} else {
|
|
cratio = base->ratio;
|
|
}
|
|
|
|
float gr = -overdb * (cratio - 1) / cratio;
|
|
float grv = Math::db2linear(gr);
|
|
|
|
runmax = maxover + relcoef * (runmax - maxover); // highest peak for setting att/rel decays in reltime
|
|
maxover = runmax;
|
|
|
|
if (grv < gr_meter) {
|
|
gr_meter = grv;
|
|
} else {
|
|
gr_meter *= gr_meter_decay;
|
|
if (gr_meter > 1) {
|
|
gr_meter = 1;
|
|
}
|
|
}
|
|
|
|
p_dst_frames[i] = p_src_frames[i] * grv * makeup * mix + p_src_frames[i] * (1.0 - mix);
|
|
}
|
|
}
|
|
|
|
Ref<AudioEffectInstance> AudioEffectCompressor::instance() {
|
|
Ref<AudioEffectCompressorInstance> ins;
|
|
ins.instance();
|
|
ins->base = Ref<AudioEffectCompressor>(this);
|
|
ins->rundb = 0;
|
|
ins->runratio = 0;
|
|
ins->averatio = 0;
|
|
ins->runmax = 0;
|
|
ins->maxover = 0;
|
|
ins->gr_meter = 1.0;
|
|
ins->current_channel = -1;
|
|
return ins;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_threshold(float p_threshold) {
|
|
threshold = p_threshold;
|
|
}
|
|
|
|
float AudioEffectCompressor::get_threshold() const {
|
|
return threshold;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_ratio(float p_ratio) {
|
|
ratio = p_ratio;
|
|
}
|
|
float AudioEffectCompressor::get_ratio() const {
|
|
return ratio;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_gain(float p_gain) {
|
|
gain = p_gain;
|
|
}
|
|
float AudioEffectCompressor::get_gain() const {
|
|
return gain;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_attack_us(float p_attack_us) {
|
|
attack_us = p_attack_us;
|
|
}
|
|
float AudioEffectCompressor::get_attack_us() const {
|
|
return attack_us;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_release_ms(float p_release_ms) {
|
|
release_ms = p_release_ms;
|
|
}
|
|
float AudioEffectCompressor::get_release_ms() const {
|
|
return release_ms;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_mix(float p_mix) {
|
|
mix = p_mix;
|
|
}
|
|
float AudioEffectCompressor::get_mix() const {
|
|
return mix;
|
|
}
|
|
|
|
void AudioEffectCompressor::set_sidechain(const StringName &p_sidechain) {
|
|
AudioServer::get_singleton()->lock();
|
|
sidechain = p_sidechain;
|
|
AudioServer::get_singleton()->unlock();
|
|
}
|
|
|
|
StringName AudioEffectCompressor::get_sidechain() const {
|
|
return sidechain;
|
|
}
|
|
|
|
void AudioEffectCompressor::_validate_property(PropertyInfo &property) const {
|
|
if (property.name == "sidechain") {
|
|
String buses = "";
|
|
for (int i = 0; i < AudioServer::get_singleton()->get_bus_count(); i++) {
|
|
buses += ",";
|
|
buses += AudioServer::get_singleton()->get_bus_name(i);
|
|
}
|
|
|
|
property.hint_string = buses;
|
|
}
|
|
}
|
|
|
|
void AudioEffectCompressor::_bind_methods() {
|
|
ClassDB::bind_method(D_METHOD("set_threshold", "threshold"), &AudioEffectCompressor::set_threshold);
|
|
ClassDB::bind_method(D_METHOD("get_threshold"), &AudioEffectCompressor::get_threshold);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_ratio", "ratio"), &AudioEffectCompressor::set_ratio);
|
|
ClassDB::bind_method(D_METHOD("get_ratio"), &AudioEffectCompressor::get_ratio);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_gain", "gain"), &AudioEffectCompressor::set_gain);
|
|
ClassDB::bind_method(D_METHOD("get_gain"), &AudioEffectCompressor::get_gain);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_attack_us", "attack_us"), &AudioEffectCompressor::set_attack_us);
|
|
ClassDB::bind_method(D_METHOD("get_attack_us"), &AudioEffectCompressor::get_attack_us);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_release_ms", "release_ms"), &AudioEffectCompressor::set_release_ms);
|
|
ClassDB::bind_method(D_METHOD("get_release_ms"), &AudioEffectCompressor::get_release_ms);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_mix", "mix"), &AudioEffectCompressor::set_mix);
|
|
ClassDB::bind_method(D_METHOD("get_mix"), &AudioEffectCompressor::get_mix);
|
|
|
|
ClassDB::bind_method(D_METHOD("set_sidechain", "sidechain"), &AudioEffectCompressor::set_sidechain);
|
|
ClassDB::bind_method(D_METHOD("get_sidechain"), &AudioEffectCompressor::get_sidechain);
|
|
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "threshold", PROPERTY_HINT_RANGE, "-60,0,0.1"), "set_threshold", "get_threshold");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "ratio", PROPERTY_HINT_RANGE, "1,48,0.1"), "set_ratio", "get_ratio");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "gain", PROPERTY_HINT_RANGE, "-20,20,0.1"), "set_gain", "get_gain");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "attack_us", PROPERTY_HINT_RANGE, "20,2000,1"), "set_attack_us", "get_attack_us");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "release_ms", PROPERTY_HINT_RANGE, "20,2000,1"), "set_release_ms", "get_release_ms");
|
|
ADD_PROPERTY(PropertyInfo(Variant::REAL, "mix", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_mix", "get_mix");
|
|
ADD_PROPERTY(PropertyInfo(Variant::STRING, "sidechain", PROPERTY_HINT_ENUM), "set_sidechain", "get_sidechain");
|
|
}
|
|
|
|
AudioEffectCompressor::AudioEffectCompressor() {
|
|
threshold = 0;
|
|
ratio = 4;
|
|
gain = 0;
|
|
attack_us = 20;
|
|
release_ms = 250;
|
|
mix = 1;
|
|
}
|