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
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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/v8/ExceptionMessages.h"
  32 #include "bindings/v8/ExceptionState.h"
  33 #include "core/dom/Document.h"
  34 #include "core/dom/ExceptionCode.h"
  35 #include "core/dom/ExecutionContext.h"
  36
  37 namespace WebCore {
  38
  39 PassRefPtrWillBeRawPtr<OfflineAudioContext> OfflineAudioContext::create(ExecutionContext* context, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
  40 {
  41     // FIXME: add support for workers.
  42     if (!context || !context->isDocument()) {
  43         exceptionState.throwDOMException(
  44             NotSupportedError,
  45             "Workers are not supported.");
  46         return nullptr;
  47     }
  48
  49     Document* document = toDocument(context);
  50
  51     if (!numberOfFrames) {
  52         exceptionState.throwDOMException(SyntaxError, "number of frames cannot be zero.");
  53         return nullptr;
  54     }
  55
  56     if (numberOfChannels > AudioContext::maxNumberOfChannels()) {
  57         exceptionState.throwDOMException(
  58             IndexSizeError,
  59             ExceptionMessages::indexOutsideRange<unsigned>(
  60                 "number of channels",
  61                 numberOfChannels,
  62                 0,
  63                 ExceptionMessages::InclusiveBound,
  64                 AudioContext::maxNumberOfChannels(),
  65                 ExceptionMessages::InclusiveBound));
  66         return nullptr;
  67     }
  68
  69     if (!isSampleRateRangeGood(sampleRate)) {
  70         exceptionState.throwDOMException(SyntaxError, "sample rate (" + String::number(sampleRate) + ") must be in the range 44100-96000 Hz.");
  71         return nullptr;
  72     }
  73
  74     RefPtrWillBeRawPtr<OfflineAudioContext> audioContext(adoptRefWillBeThreadSafeRefCountedGarbageCollected(new OfflineAudioContext(document, numberOfChannels, numberOfFrames, sampleRate)));
  75
  76     if (!audioContext->destination()) {
  77         exceptionState.throwDOMException(
  78             NotSupportedError,
  79             "OfflineAudioContext(" + String::number(numberOfChannels)
  80             + ", " + String::number(numberOfFrames)
  81             + ", " + String::number(sampleRate)
  82             + ")");
  83     }
  84
  85     audioContext->suspendIfNeeded();
  86     return audioContext.release();
  87 }
  88
  89 OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
  90     : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate)
  91 {
  92     ScriptWrappable::init(this);
  93 }
  94
  95 OfflineAudioContext::~OfflineAudioContext()
  96 {
  97 }
  98
  99 } // namespace WebCore
 100
 101 #endif // ENABLE(WEB_AUDIO)