142 lines
5 KiB
C++
142 lines
5 KiB
C++
/*************************************************************************/
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/* audio_effect_eq.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "audio_effect_eq.h"
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#include "servers/audio_server.h"
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void AudioEffectEQInstance::process(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) {
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int band_count = bands[0].size();
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EQ::BandProcess *proc_l = bands[0].ptrw();
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EQ::BandProcess *proc_r = bands[1].ptrw();
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float *bgain = gains.ptrw();
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for (int i = 0; i < band_count; i++) {
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bgain[i] = Math::db2linear(base->gain[i]);
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}
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for (int i = 0; i < p_frame_count; i++) {
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AudioFrame src = p_src_frames[i];
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AudioFrame dst = AudioFrame(0, 0);
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for (int j = 0; j < band_count; j++) {
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float l = src.l;
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float r = src.r;
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proc_l[j].process_one(l);
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proc_r[j].process_one(r);
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dst.l += l * bgain[j];
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dst.r += r * bgain[j];
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}
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p_dst_frames[i] = dst;
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}
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}
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Ref<AudioEffectInstance> AudioEffectEQ::instance() {
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Ref<AudioEffectEQInstance> ins;
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ins.instance();
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ins->base = Ref<AudioEffectEQ>(this);
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ins->gains.resize(eq.get_band_count());
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for (int i = 0; i < 2; i++) {
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ins->bands[i].resize(eq.get_band_count());
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for (int j = 0; j < ins->bands[i].size(); j++) {
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ins->bands[i].write[j] = eq.get_band_processor(j);
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}
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}
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return ins;
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}
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void AudioEffectEQ::set_band_gain_db(int p_band, float p_volume) {
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ERR_FAIL_INDEX(p_band, gain.size());
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gain.write[p_band] = p_volume;
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}
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float AudioEffectEQ::get_band_gain_db(int p_band) const {
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ERR_FAIL_INDEX_V(p_band, gain.size(), 0);
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return gain[p_band];
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}
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int AudioEffectEQ::get_band_count() const {
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return gain.size();
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}
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bool AudioEffectEQ::_set(const StringName &p_name, const Variant &p_value) {
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const Map<StringName, int>::Element *E = prop_band_map.find(p_name);
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if (E) {
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set_band_gain_db(E->get(), p_value);
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return true;
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}
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return false;
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}
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bool AudioEffectEQ::_get(const StringName &p_name, Variant &r_ret) const {
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const Map<StringName, int>::Element *E = prop_band_map.find(p_name);
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if (E) {
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r_ret = get_band_gain_db(E->get());
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return true;
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}
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return false;
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}
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void AudioEffectEQ::_get_property_list(List<PropertyInfo> *p_list) const {
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for (int i = 0; i < band_names.size(); i++) {
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p_list->push_back(PropertyInfo(Variant::REAL, band_names[i], PROPERTY_HINT_RANGE, "-60,24,0.1"));
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}
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}
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void AudioEffectEQ::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_band_gain_db", "band_idx", "volume_db"), &AudioEffectEQ::set_band_gain_db);
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ClassDB::bind_method(D_METHOD("get_band_gain_db", "band_idx"), &AudioEffectEQ::get_band_gain_db);
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ClassDB::bind_method(D_METHOD("get_band_count"), &AudioEffectEQ::get_band_count);
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}
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AudioEffectEQ::AudioEffectEQ(EQ::Preset p_preset) {
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eq.set_mix_rate(AudioServer::get_singleton()->get_mix_rate());
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eq.set_preset_band_mode(p_preset);
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gain.resize(eq.get_band_count());
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for (int i = 0; i < gain.size(); i++) {
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gain.write[i] = 0.0;
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String name = "band_db/" + itos(eq.get_band_frequency(i)) + "_hz";
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prop_band_map[name] = i;
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band_names.push_back(name);
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}
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}
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