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      1 /*
      2  * Copyright (C) 2010, Google Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1.  Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2.  Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16  * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     20  * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     22  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23  */
     24 
     25 #include "config.h"
     26 
     27 #if ENABLE(WEB_AUDIO)
     28 
     29 #include "modules/webaudio/DelayNode.h"
     30 
     31 #include "bindings/core/v8/ExceptionMessages.h"
     32 #include "bindings/core/v8/ExceptionState.h"
     33 #include "core/dom/ExceptionCode.h"
     34 #include "wtf/MathExtras.h"
     35 
     36 namespace blink {
     37 
     38 const double maximumAllowedDelayTime = 180;
     39 
     40 DelayNode::DelayNode(AudioContext* context, float sampleRate, double maxDelayTime, ExceptionState& exceptionState)
     41     : AudioBasicProcessorNode(context, sampleRate)
     42 {
     43     if (maxDelayTime <= 0 || maxDelayTime >= maximumAllowedDelayTime || std::isnan(maxDelayTime)) {
     44         exceptionState.throwDOMException(
     45             NotSupportedError,
     46             "max delay time (" + String::number(maxDelayTime)
     47             + ") must be between 0 and " + String::number(maximumAllowedDelayTime)
     48             + ", exclusive.");
     49         return;
     50     }
     51     m_processor = new DelayProcessor(context, sampleRate, 1, maxDelayTime);
     52     setNodeType(NodeTypeDelay);
     53 }
     54 
     55 AudioParam* DelayNode::delayTime()
     56 {
     57     return delayProcessor()->delayTime();
     58 }
     59 
     60 } // namespace blink
     61 
     62 #endif // ENABLE(WEB_AUDIO)
     63