97 lines
2.3 KiB
C++
97 lines
2.3 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 "paneffect.h"
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#include <QGridLayout>
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#include <QLabel>
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#include <QtMath>
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#include <cmath>
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#include "ui/labelslider.h"
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#include "ui/collapsiblewidget.h"
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PanEffect::PanEffect(Clip* c) : Node(c) {
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pan_val = new DoubleInput(this, "pan", tr("Pan"));
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pan_val->SetMinimum(-100);
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pan_val->SetDefault(0);
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pan_val->SetMaximum(100);
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}
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QString PanEffect::name()
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{
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return tr("Pan");
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}
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QString PanEffect::id()
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{
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return "org.olivevideoeditor.Olive.pan";
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}
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QString PanEffect::description()
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{
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return tr("Modifying the panning on a stereo audio clip.");
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}
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EffectType PanEffect::type()
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{
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return EFFECT_TYPE_EFFECT;
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}
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olive::TrackType PanEffect::subtype()
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{
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return olive::kTypeAudio;
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}
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NodePtr PanEffect::Create(Clip *c)
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{
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return std::make_shared<PanEffect>(c);
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}
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void PanEffect::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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// This has no effect on mono sources
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if (channel_count < 2) {
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return;
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}
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double interval = (timecode_end - timecode_start)/nb_samples;
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for (int i=0;i<nb_samples;i++) {
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double pan_field_val = pan_val->GetDoubleAt(timecode_start+(interval*i));
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double pval = log_volume(qAbs(pan_field_val)*0.01);
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if (pan_field_val < 0) {
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// affect right channel
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samples[1][i] *= (1.0-pval);
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} else {
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// affect left channel
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samples[0][i] *= (1.0-pval);
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}
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}
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}
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