Source/WebCore/Modules/webaudio/DelayNode.cpp

/*
 * Copyright (C) 2010, 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:
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 *    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
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#include "config.h"

#if ENABLE(WEB_AUDIO)

#include "DelayNode.h"

#include "DelayProcessor.h"
#include <wtf/IsoMallocInlines.h>

namespace WebCore {

WTF_MAKE_ISO_ALLOCATED_IMPL(DelayNode);

const double maximumAllowedDelayTime = 180;

inline DelayNode::DelayNode(AudioContext& context, float sampleRate, double maxDelayTime)
    : AudioBasicProcessorNode(context, sampleRate)
{
    setNodeType(NodeTypeDelay);
    m_processor = makeUnique<DelayProcessor>(context, sampleRate, 1, maxDelayTime);
}

ExceptionOr<Ref<DelayNode>> DelayNode::create(AudioContext& context, float sampleRate, double maxDelayTime)
{
    if (maxDelayTime <= 0 || maxDelayTime >= maximumAllowedDelayTime)
        return Exception { NotSupportedError };
    return adoptRef(*new DelayNode(context, sampleRate, maxDelayTime));
}

AudioParam* DelayNode::delayTime()
{
    return static_cast<DelayProcessor&>(*m_processor).delayTime();
}

} // namespace WebCore

#endif // ENABLE(WEB_AUDIO)