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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
***/
#include "pan.h"
OLIVE_NAMESPACE_ENTER
PanNode::PanNode()
{
samples_input_ = new NodeInput("samples_in", NodeParam::kSamples);
AddInput(samples_input_);
panning_input_ = new NodeInput("panning_in", NodeParam::kFloat, 0.0);
panning_input_->set_property("min", -1.0);
panning_input_->set_property("max", 1.0);
panning_input_->set_property("view", "percent");
AddInput(panning_input_);
}
Node *PanNode::copy() const
{
return new PanNode();
}
QString PanNode::Name() const
{
return tr("Pan");
}
QString PanNode::id() const
{
return QStringLiteral("org.olivevideoeditor.Olive.pan");
}
QList<Node::CategoryID> PanNode::Category() const
{
return {kCategoryChannels};
}
QString PanNode::Description() const
{
return tr("Adjust the stereo panning of an audio source.");
}
NodeValueTable PanNode::Value(NodeValueDatabase &value) const
{
// Create a sample job
SampleJob job(samples_input_, value);
job.InsertValue(panning_input_, value);
// Push it to our table
NodeValueTable table = value.Merge();
if (job.HasSamples()) {
float pan_volume = job.GetValue(panning_input_).data().toFloat();
if (panning_input_->is_static()) {
if (!qIsNull(pan_volume) && job.samples()->audio_params().channel_count() == 2) {
if (pan_volume > 0) {
job.samples()->transform_volume_for_channel(0, 1.0f - pan_volume);
} else {
job.samples()->transform_volume_for_channel(1, 1.0f + pan_volume);
}
}
table.Push(NodeParam::kSamples, QVariant::fromValue(job.samples()), this);
} else {
table.Push(NodeParam::kSampleJob, QVariant::fromValue(job), this);
}
}
return table;
}
void PanNode::ProcessSamples(NodeValueDatabase &values, const SampleBufferPtr input, SampleBufferPtr output, int index) const
{
if (input->audio_params().channel_count() != 2) {
// This node currently only works for stereo audio
return;
}
float pan_val = values[panning_input_].Get(NodeParam::kFloat).toFloat();
for (int i=0;i<input->audio_params().channel_count();i++) {
output->data()[i][index] = input->data()[i][index];
}
if (pan_val > 0) {
output->data()[0][index] *= (1.0F - pan_val);
} else if (pan_val < 0) {
output->data()[1][index] *= (1.0F - qAbs(pan_val));
}
}
void PanNode::Retranslate()
{
samples_input_->set_name(tr("Samples"));
panning_input_->set_name(tr("Pan"));
}
OLIVE_NAMESPACE_EXIT
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