src/third_party/WebKit/Source/modules/webaudio/OfflineAudioContext.cpp

   1 /*
   2  * Copyright (C) 2012, 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;
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  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/OfflineAudioContext.h"
  30
  31 #include "bindings/core/v8/ExceptionMessages.h"
  32 #include "bindings/core/v8/ExceptionState.h"
  33 #include "core/dom/Document.h"
  34 #include "core/dom/ExceptionCode.h"
  35 #include "core/dom/ExecutionContext.h"
  36 #include "platform/audio/AudioUtilities.h"
  37
  38 namespace blink {
  39
  40 OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
  41 {
  42     // FIXME: add support for workers.
  43     if (!context || !context->isDocument()) {
  44         exceptionState.throwDOMException(
  45             NotSupportedError,
  46             "Workers are not supported.");
  47         return 0;
  48     }
  49
  50     Document* document = toDocument(context);
  51
  52     if (!numberOfFrames) {
  53         exceptionState.throwDOMException(SyntaxError, "number of frames cannot be zero.");
  54         return 0;
  55     }
  56
  57     if (numberOfChannels > AudioContext::maxNumberOfChannels()) {
  58         exceptionState.throwDOMException(
  59             IndexSizeError,
  60             ExceptionMessages::indexOutsideRange<unsigned>(
  61                 "number of channels",
  62                 numberOfChannels,
  63                 0,
  64                 ExceptionMessages::InclusiveBound,
  65                 AudioContext::maxNumberOfChannels(),
  66                 ExceptionMessages::InclusiveBound));
  67         return 0;
  68     }
  69
  70     if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate)) {
  71         exceptionState.throwDOMException(
  72             IndexSizeError,
  73             ExceptionMessages::indexOutsideRange(
  74                 "sampleRate", sampleRate,
  75                 AudioUtilities::minAudioBufferSampleRate(), ExceptionMessages::InclusiveBound,
  76                 AudioUtilities::maxAudioBufferSampleRate(), ExceptionMessages::InclusiveBound));
  77         return nullptr;
  78     }
  79
  80     OfflineAudioContext* audioContext = new OfflineAudioContext(document, numberOfChannels, numberOfFrames, sampleRate);
  81
  82     if (!audioContext->destination()) {
  83         exceptionState.throwDOMException(
  84             NotSupportedError,
  85             "OfflineAudioContext(" + String::number(numberOfChannels)
  86             + ", " + String::number(numberOfFrames)
  87             + ", " + String::number(sampleRate)
  88             + ")");
  89     }
  90
  91     audioContext->suspendIfNeeded();
  92     return audioContext;
  93 }
  94
  95 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
  96     : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate)
  97 {
  98 }
  99
 100 OfflineAudioContext::~OfflineAudioContext()
 101 {
 102 }
 103
 104 } // namespace blink
 105
 106 #endif // ENABLE(WEB_AUDIO)