/*
 * 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 "AudioBasicProcessorNode.h"
#include "IIRFilterOptions.h"
#include "IIRProcessor.h"
#include <JavaScriptCore/Forward.h>
#include <wtf/IsoMalloc.h>

namespace WebCore {

class IIRFilterNode final : public AudioBasicProcessorNode {
    WTF_MAKE_ISO_ALLOCATED(IIRFilterNode);
public:
    static ExceptionOr<Ref<IIRFilterNode>> create(ScriptExecutionContext&, BaseAudioContext&, IIRFilterOptions&&);

    ExceptionOr<void> getFrequencyResponse(Float32Array& frequencyHz, Float32Array& magResponse, Float32Array& phaseResponse);

private:
    IIRFilterNode(BaseAudioContext&, const Vector<double>& feedforward, const Vector<double>& feedback, bool isFilterStable);

    IIRProcessor* iirProcessor() { return static_cast<IIRProcessor*>(processor()); }
};

} // namespace WebCore