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/*
* Copyright (C) 2011, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "DynamicsCompressorNode.h"
#include "AudioContext.h"
#include "AudioNodeInput.h"
#include "AudioNodeOutput.h"
#include "DynamicsCompressor.h"
// Set output to stereo by default.
static const unsigned defaultNumberOfOutputChannels = 2;
namespace WebCore {
DynamicsCompressorNode::DynamicsCompressorNode(AudioContext& context, float sampleRate)
: AudioNode(context, sampleRate)
{
addInput(std::make_unique<AudioNodeInput>(this));
addOutput(std::make_unique<AudioNodeOutput>(this, defaultNumberOfOutputChannels));
setNodeType(NodeTypeDynamicsCompressor);
m_threshold = AudioParam::create(context, "threshold", -24, -100, 0);
m_knee = AudioParam::create(context, "knee", 30, 0, 40);
m_ratio = AudioParam::create(context, "ratio", 12, 1, 20);
m_reduction = AudioParam::create(context, "reduction", 0, -20, 0);
m_attack = AudioParam::create(context, "attack", 0.003, 0, 1);
m_release = AudioParam::create(context, "release", 0.250, 0, 1);
initialize();
}
DynamicsCompressorNode::~DynamicsCompressorNode()
{
uninitialize();
}
void DynamicsCompressorNode::process(size_t framesToProcess)
{
AudioBus* outputBus = output(0)->bus();
ASSERT(outputBus);
float threshold = m_threshold->value();
float knee = m_knee->value();
float ratio = m_ratio->value();
float attack = m_attack->value();
float release = m_release->value();
m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamThreshold, threshold);
m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamKnee, knee);
m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamRatio, ratio);
m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamAttack, attack);
m_dynamicsCompressor->setParameterValue(DynamicsCompressor::ParamRelease, release);
m_dynamicsCompressor->process(input(0)->bus(), outputBus, framesToProcess);
float reduction = m_dynamicsCompressor->parameterValue(DynamicsCompressor::ParamReduction);
m_reduction->setValue(reduction);
}
void DynamicsCompressorNode::reset()
{
m_dynamicsCompressor->reset();
}
void DynamicsCompressorNode::initialize()
{
if (isInitialized())
return;
AudioNode::initialize();
m_dynamicsCompressor = std::make_unique<DynamicsCompressor>(sampleRate(), defaultNumberOfOutputChannels);
}
void DynamicsCompressorNode::uninitialize()
{
if (!isInitialized())
return;
m_dynamicsCompressor = nullptr;
AudioNode::uninitialize();
}
double DynamicsCompressorNode::tailTime() const
{
return m_dynamicsCompressor->tailTime();
}
double DynamicsCompressorNode::latencyTime() const
{
return m_dynamicsCompressor->latencyTime();
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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