| /* |
| * 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 "AudioDSPKernelProcessor.h" |
| #include <wtf/Vector.h> |
| |
| namespace WebCore { |
| |
| class IIRDSPKernel; |
| |
| class IIRProcessor final : public AudioDSPKernelProcessor { |
| public: |
| IIRProcessor(float sampleRate, unsigned numberOfChannels, const Vector<double>& feedforward, const Vector<double>& feedback, bool isFilterStable); |
| ~IIRProcessor(); |
| |
| // AudioDSPKernelProcessor. |
| void process(const AudioBus* source, AudioBus* destination, size_t framesToProcess) final; |
| std::unique_ptr<AudioDSPKernel> createKernel() final; |
| |
| // 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); |
| |
| const Vector<double>& feedforward() const { return m_feedforward; } |
| const Vector<double>& feedback() const { return m_feedback; } |
| bool isFilterStable() const { return m_isFilterStable; } |
| |
| private: |
| Vector<double> m_feedforward; |
| Vector<double> m_feedback; |
| bool m_isFilterStable; |
| |
| std::unique_ptr<IIRDSPKernel> m_responseKernel; |
| }; |
| |
| } // namespace WebCore |