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      1 /*
      2  * Copyright (C) 2011, 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 "DefaultAudioDestinationNode.h"
     30 
     31 #ifndef NDEBUG
     32 #include <stdio.h>
     33 #endif
     34 
     35 namespace WebCore {
     36 
     37 DefaultAudioDestinationNode::DefaultAudioDestinationNode(AudioContext* context)
     38     : AudioDestinationNode(context, AudioDestination::hardwareSampleRate())
     39 {
     40     initialize();
     41 }
     42 
     43 DefaultAudioDestinationNode::~DefaultAudioDestinationNode()
     44 {
     45     uninitialize();
     46 }
     47 
     48 void DefaultAudioDestinationNode::initialize()
     49 {
     50     if (isInitialized())
     51         return;
     52 
     53     double hardwareSampleRate = AudioDestination::hardwareSampleRate();
     54 #ifndef NDEBUG
     55     fprintf(stderr, ">>>> hardwareSampleRate = %f\n", hardwareSampleRate);
     56 #endif
     57 
     58     m_destination = AudioDestination::create(*this, hardwareSampleRate);
     59 
     60     AudioNode::initialize();
     61 }
     62 
     63 void DefaultAudioDestinationNode::uninitialize()
     64 {
     65     if (!isInitialized())
     66         return;
     67 
     68     m_destination->stop();
     69 
     70     AudioNode::uninitialize();
     71 }
     72 
     73 void DefaultAudioDestinationNode::startRendering()
     74 {
     75     ASSERT(isInitialized());
     76     if (isInitialized())
     77         m_destination->start();
     78 }
     79 
     80 } // namespace WebCore
     81 
     82 #endif // ENABLE(WEB_AUDIO)
     83