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/*************************************************************************/
/* audio_effect_amplify.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 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_amplify.h"
void AudioEffectAmplifyInstance::process(const AudioFrame *p_src_frames, AudioFrame *p_dst_frames, int p_frame_count) {
//multiply volume interpolating to avoid clicks if this changes
float volume_db = base->volume_db;
float vol = Math::db2linear(mix_volume_db);
float vol_inc = (Math::db2linear(volume_db) - vol) / float(p_frame_count);
for (int i = 0; i < p_frame_count; i++) {
p_dst_frames[i] = p_src_frames[i] * vol;
vol += vol_inc;
}
//set volume for next mix
mix_volume_db = volume_db;
}
Ref<AudioEffectInstance> AudioEffectAmplify::instance() {
Ref<AudioEffectAmplifyInstance> ins;
ins.instance();
ins->base = Ref<AudioEffectAmplify>(this);
ins->mix_volume_db = volume_db;
return ins;
}
void AudioEffectAmplify::set_volume_db(float p_volume) {
volume_db = p_volume;
}
float AudioEffectAmplify::get_volume_db() const {
return volume_db;
}
void AudioEffectAmplify::_bind_methods() {
ClassDB::bind_method(D_METHOD("set_volume_db", "volume"), &AudioEffectAmplify::set_volume_db);
ClassDB::bind_method(D_METHOD("get_volume_db"), &AudioEffectAmplify::get_volume_db);
ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "volume_db", PROPERTY_HINT_RANGE, "-80,24,0.01"), "set_volume_db", "get_volume_db");
}
AudioEffectAmplify::AudioEffectAmplify() {
volume_db = 0;
}
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