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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.
*/
#ifndef DynamicsCompressorNode_h
#define DynamicsCompressorNode_h
#include "AudioNode.h"
#include "AudioParam.h"
#include <memory>
namespace WebCore {
class DynamicsCompressor;
class DynamicsCompressorNode : public AudioNode {
public:
static Ref<DynamicsCompressorNode> create(AudioContext& context, float sampleRate)
{
return adoptRef(*new DynamicsCompressorNode(context, sampleRate));
}
virtual ~DynamicsCompressorNode();
// AudioNode
virtual void process(size_t framesToProcess) override;
virtual void reset() override;
virtual void initialize() override;
virtual void uninitialize() override;
// Static compression curve parameters.
AudioParam* threshold() { return m_threshold.get(); }
AudioParam* knee() { return m_knee.get(); }
AudioParam* ratio() { return m_ratio.get(); }
AudioParam* attack() { return m_attack.get(); }
AudioParam* release() { return m_release.get(); }
// Amount by which the compressor is currently compressing the signal in decibels.
AudioParam* reduction() { return m_reduction.get(); }
private:
virtual double tailTime() const override;
virtual double latencyTime() const override;
DynamicsCompressorNode(AudioContext&, float sampleRate);
std::unique_ptr<DynamicsCompressor> m_dynamicsCompressor;
RefPtr<AudioParam> m_threshold;
RefPtr<AudioParam> m_knee;
RefPtr<AudioParam> m_ratio;
RefPtr<AudioParam> m_reduction;
RefPtr<AudioParam> m_attack;
RefPtr<AudioParam> m_release;
};
} // namespace WebCore
#endif // DynamicsCompressorNode_h
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