| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #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 |
| void process(size_t framesToProcess) override; |
| void reset() override; |
| void initialize() override; |
| 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: |
| double tailTime() const override; |
| 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 |