/* * Copyright 2016 The Chromium Authors. 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. */ #pragma once #include "AudioDSPKernel.h" #include "IIRFilter.h" #include "IIRProcessor.h" namespace WebCore { class IIRDSPKernel final : public AudioDSPKernel { public: explicit IIRDSPKernel(IIRProcessor&); // Get the magnitude and phase response of the filter at the given set of frequencies (in Hz). The phase response is in radians. void getFrequencyResponse(unsigned length, const float* frequencyHz, float* magResponse, float* phaseResponse); private: IIRProcessor* iirProcessor() { return static_cast<IIRProcessor*>(processor()); } // AudioDSPKernel void process(const float* source, float* destination, size_t framesToProcess) final; double tailTime() const final { return m_tailTime; } double latencyTime() const final { return 0; } void reset() final; bool requiresTailProcessing() const final; IIRFilter m_iirFilter; double m_tailTime; }; } // namespace WebCore