60 lines
2.5 KiB
C++
60 lines
2.5 KiB
C++
/*
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* Copyright 2016 The Chromium Authors. All rights reserved.
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* Copyright (C) 2020, Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "AudioDSPKernelProcessor.h"
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#include <wtf/Vector.h>
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namespace WebCore {
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class IIRDSPKernel;
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class IIRProcessor final : public AudioDSPKernelProcessor {
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public:
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IIRProcessor(float sampleRate, unsigned numberOfChannels, const Vector<double>& feedforward, const Vector<double>& feedback, bool isFilterStable);
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~IIRProcessor();
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// AudioDSPKernelProcessor.
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void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) final;
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std::unique_ptr<AudioDSPKernel> createKernel() final;
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// Get the magnitude and phase response of the filter at the given set of frequencies (in Hz). The phase response is in radians.
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void getFrequencyResponse(unsigned length, const float* frequencyHz, float* magResponse, float* phaseResponse);
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const Vector<double>& feedforward() const { return m_feedforward; }
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const Vector<double>& feedback() const { return m_feedback; }
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bool isFilterStable() const { return m_isFilterStable; }
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private:
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Vector<double> m_feedforward;
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Vector<double> m_feedback;
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bool m_isFilterStable;
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std::unique_ptr<IIRDSPKernel> m_responseKernel;
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};
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} // namespace WebCore
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