Source/modules/webaudio/DelayNode.cpp

/*
 * Copyright (C) 2010, Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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#include "config.h"

#if ENABLE(WEB_AUDIO)

#include "modules/webaudio/DelayNode.h"

#include "bindings/core/v8/ExceptionMessages.h"
#include "bindings/core/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "wtf/MathExtras.h"

namespace blink {

const double maximumAllowedDelayTime = 180;

DelayNode::DelayNode(AudioContext* context, float sampleRate, double maxDelayTime, ExceptionState& exceptionState)
    : AudioBasicProcessorNode(context, sampleRate)
{
    if (maxDelayTime <= 0 || maxDelayTime >= maximumAllowedDelayTime || std::isnan(maxDelayTime)) {
        exceptionState.throwDOMException(
            NotSupportedError,
            "max delay time (" + String::number(maxDelayTime)
            + ") must be between 0 and " + String::number(maximumAllowedDelayTime)
            + ", exclusive.");
        return;
    }
    m_processor = new DelayProcessor(context, sampleRate, 1, maxDelayTime);
    setNodeType(NodeTypeDelay);
}

AudioParam* DelayNode::delayTime()
{
    return delayProcessor()->delayTime();
}

} // namespace blink

#endif // ENABLE(WEB_AUDIO)