/***

  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 "volume.h"

OLIVE_NAMESPACE_ENTER

VolumeNode::VolumeNode()
{
  samples_input_ = new NodeInput("samples_in", NodeParam::kSamples);
  AddInput(samples_input_);

  volume_input_ = new NodeInput("volume_in", NodeParam::kFloat, 1.0);
  volume_input_->set_property("min", 0.0);
  volume_input_->set_property("view", "db");
  AddInput(volume_input_);
}

Node *VolumeNode::copy() const
{
  return new VolumeNode();
}

QString VolumeNode::Name() const
{
  return tr("Volume");
}

QString VolumeNode::id() const
{
  return QStringLiteral("org.olivevideoeditor.Olive.volume");
}

QList<Node::CategoryID> VolumeNode::Category() const
{
  return {kCategoryFilter};
}

QString VolumeNode::Description() const
{
  return tr("Adjusts the volume of an audio source.");
}

NodeValueTable VolumeNode::Value(NodeValueDatabase &value) const
{
  SampleJob job(samples_input_, value);
  job.InsertValue(volume_input_, value);

  NodeValueTable table = value.Merge();

  if (job.HasSamples()) {
    float volume_val = job.GetValue(volume_input_).data().toFloat();
    if (volume_input_->is_static()) {
      // Volume never changes so we can make some performance optimizations here
      if (!qFuzzyCompare(volume_val, 1.0f)) {
        job.samples()->transform_volume(volume_val);
      }

      table.Push(NodeParam::kSamples, QVariant::fromValue(job.samples()), this);
    } else {
      table.Push(NodeParam::kSampleJob, QVariant::fromValue(job), this);
    }
  }

  return table;
}

void VolumeNode::ProcessSamples(NodeValueDatabase &values, const SampleBufferPtr input, SampleBufferPtr output, int index) const
{
  float volume_val = values[volume_input_].Get(NodeParam::kFloat).toFloat();

  for (int i=0;i<output->audio_params().channel_count();i++) {
    output->data()[i][index] = input->data()[i][index] * volume_val;
  }
}

void VolumeNode::Retranslate()
{
  samples_input_->set_name(tr("Samples"));
  volume_input_->set_name(tr("Volume"));
}

OLIVE_NAMESPACE_EXIT