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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 "crossdissolvetransition.h"
OLIVE_NAMESPACE_ENTER
CrossDissolveTransition::CrossDissolveTransition()
{
}
Node *CrossDissolveTransition::copy() const
{
return new CrossDissolveTransition();
}
QString CrossDissolveTransition::Name() const
{
return tr("Cross Dissolve");
}
QString CrossDissolveTransition::id() const
{
return QStringLiteral("org.olivevideoeditor.Olive.crossdissolve");
}
QList<Node::CategoryID> CrossDissolveTransition::Category() const
{
return {kCategoryTransition};
}
QString CrossDissolveTransition::Description() const
{
return tr("Smoothly transition between two clips.");
}
ShaderCode CrossDissolveTransition::GetShaderCode(const QString &shader_id) const
{
Q_UNUSED(shader_id)
return ShaderCode(Node::ReadFileAsString(":/shaders/crossdissolve.frag"), QString());
}
void CrossDissolveTransition::SampleJobEvent(SampleBufferPtr from_samples, SampleBufferPtr to_samples, SampleBufferPtr out_samples, double time_in) const
{
for (int i=0; i<out_samples->sample_count(); i++) {
double this_sample_time = out_samples->audio_params().samples_to_time(i).toDouble() + time_in;
double progress = GetTotalProgress(this_sample_time);
for (int j=0; j<out_samples->audio_params().channel_count(); j++) {
out_samples->data()[j][i] = 0;
if (from_samples) {
if (i < from_samples->sample_count()) {
out_samples->data()[j][i] += from_samples->data()[j][i] * TransformCurve(1.0 - progress);
}
}
if (to_samples) {
// Offset input samples from the end
int in_index = i - (out_samples->sample_count() - to_samples->sample_count());
if (in_index >= 0) {
out_samples->data()[j][i] += to_samples->data()[j][in_index] * TransformCurve(progress);
}
}
}
}
}
OLIVE_NAMESPACE_EXIT
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