67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "audionoiseeffect.h"
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#include <QDateTime>
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#include <QtMath>
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AudioNoiseEffect::AudioNoiseEffect(Clip* c, const EffectMeta *em) : Effect(c, em) {
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EffectRow* amount_row = new EffectRow(this, tr("Amount"));
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amount_val = new DoubleField(amount_row, "amount");
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amount_val->SetMinimum(0);
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amount_val->SetDefault(20);
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amount_val->SetMaximum(100);
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EffectRow* mix_row = new EffectRow(this, tr("Mix"));
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mix_val = new BoolField(mix_row, "mix");
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mix_val->SetValueAt(0, true);
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}
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void AudioNoiseEffect::process_audio(double timecode_start,
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double timecode_end,
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float **samples,
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int nb_samples,
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int channel_count,
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int type) {
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Q_UNUSED(type)
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double interval = (timecode_end - timecode_start)/nb_samples;
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for (int i=0;i<nb_samples;i+=4) {
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double timecode = timecode_start+(interval*i);
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// set noise volume
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float vol = log_volume( amount_val->GetDoubleAt(timecode)*0.01 );
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for (int j=0;j<channel_count;j++) {
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// Generate noise sample
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float noise_sample = this->randomFloat<float>() * vol;
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// mix with source audio
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if (mix_val->GetBoolAt(timecode)) {
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samples[j][i] += noise_sample;
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} else {
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samples[j][i] = noise_sample;
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}
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}
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}
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}
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