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/*
* Copyright (C) 2011, Google Inc. All rights reserved.
* Copyright (C) 2020, Apple 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 "AudioUtilities.h"
#include "DynamicsCompressor.h"
#include <wtf/IsoMallocInlines.h>
// Set output to stereo by default.
static constexpr unsigned defaultNumberOfOutputChannels = 2;
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(DynamicsCompressorNode);
ExceptionOr<Ref<DynamicsCompressorNode>> DynamicsCompressorNode::create(BaseAudioContext& context, const DynamicsCompressorOptions& options)
{
auto node = adoptRef(*new DynamicsCompressorNode(context, options));
auto result = node->handleAudioNodeOptions(options, { 2, ChannelCountMode::ClampedMax, ChannelInterpretation::Speakers });
if (result.hasException())
return result.releaseException();
return node;
}
DynamicsCompressorNode::DynamicsCompressorNode(BaseAudioContext& context, const DynamicsCompressorOptions& options)
: AudioNode(context, NodeTypeDynamicsCompressor)
, m_threshold(AudioParam::create(context, "threshold"_s, options.threshold, -100, 0, AutomationRate::KRate, AutomationRateMode::Fixed))
, m_knee(AudioParam::create(context, "knee"_s, options.knee, 0, 40, AutomationRate::KRate, AutomationRateMode::Fixed))
, m_ratio(AudioParam::create(context, "ratio"_s, options.ratio, 1, 20, AutomationRate::KRate, AutomationRateMode::Fixed))
, m_attack(AudioParam::create(context, "attack"_s, options.attack, 0, 1, AutomationRate::KRate, AutomationRateMode::Fixed))
, m_release(AudioParam::create(context, "release"_s, options.release, 0, 1, AutomationRate::KRate, AutomationRateMode::Fixed))
{
addInput();
addOutput(defaultNumberOfOutputChannels);
initialize();
}
DynamicsCompressorNode::~DynamicsCompressorNode()
{
uninitialize();
}
void DynamicsCompressorNode::process(size_t framesToProcess)
{
AudioBus* outputBus = output(0)->bus();
ASSERT(outputBus);
float threshold = m_threshold->finalValue();
float knee = m_knee->finalValue();
float ratio = m_ratio->finalValue();
float attack = m_attack->finalValue();
float release = m_release->finalValue();
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);
setReduction(m_dynamicsCompressor->parameterValue(DynamicsCompressor::ParamReduction));
}
void DynamicsCompressorNode::processOnlyAudioParams(size_t framesToProcess)
{
float values[AudioUtilities::renderQuantumSize];
ASSERT(framesToProcess <= AudioUtilities::renderQuantumSize);
m_threshold->calculateSampleAccurateValues(values, framesToProcess);
m_knee->calculateSampleAccurateValues(values, framesToProcess);
m_ratio->calculateSampleAccurateValues(values, framesToProcess);
m_attack->calculateSampleAccurateValues(values, framesToProcess);
m_release->calculateSampleAccurateValues(values, framesToProcess);
}
void DynamicsCompressorNode::initialize()
{
if (isInitialized())
return;
AudioNode::initialize();
m_dynamicsCompressor = makeUnique<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();
}
bool DynamicsCompressorNode::requiresTailProcessing() const
{
// Always return true even if the tail time and latency might both be zero.
return true;
}
ExceptionOr<void> DynamicsCompressorNode::setChannelCount(unsigned count)
{
if (count > 2)
return Exception { NotSupportedError, "DynamicsCompressorNode's channel count cannot be greater than 2"_s };
return AudioNode::setChannelCount(count);
}
ExceptionOr<void> DynamicsCompressorNode::setChannelCountMode(ChannelCountMode mode)
{
if (mode == ChannelCountMode::Max)
return Exception { NotSupportedError, "DynamicsCompressorNode's channel count mode cannot be set to 'max'"_s };
return AudioNode::setChannelCountMode(mode);
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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