text: /*
   * Copyright (C) 2012, Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1.  Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2.  Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
   * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
   * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include "config.h"
  
  #if ENABLE(WEB_AUDIO)
  
  #include "modules/webaudio/OfflineAudioContext.h"
  
  #include "bindings/core/v8/ExceptionMessages.h"
  #include "bindings/core/v8/ExceptionState.h"
  #include "core/dom/Document.h"
  #include "core/dom/ExceptionCode.h"
  #include "core/dom/ExecutionContext.h"
  #include "platform/audio/AudioUtilities.h"
  
  namespace blink {
  
  OfflineAudioContext* OfflineAudioContext::create(ExecutionContext* context, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate, ExceptionState& exceptionState)
  {
      // FIXME: add support for workers.
      if (!context || !context->isDocument()) {
          exceptionState.throwDOMException(
              NotSupportedError,
              "Workers are not supported.");
          return 0;
      }
  
      Document* document = toDocument(context);
  
      if (!numberOfFrames) {
          exceptionState.throwDOMException(SyntaxError, "number of frames cannot be zero.");
          return 0;
      }
  
      if (numberOfChannels > AudioContext::maxNumberOfChannels()) {
          exceptionState.throwDOMException(
              IndexSizeError,
              ExceptionMessages::indexOutsideRange<unsigned>(
                  "number of channels",
                  numberOfChannels,
                  0,
                  ExceptionMessages::InclusiveBound,
                  AudioContext::maxNumberOfChannels(),
                  ExceptionMessages::InclusiveBound));
          return 0;
      }
  
      if (!AudioUtilities::isValidAudioBufferSampleRate(sampleRate)) {
          exceptionState.throwDOMException(
              IndexSizeError,
              ExceptionMessages::indexOutsideRange(
                  "sampleRate", sampleRate,
                  AudioUtilities::minAudioBufferSampleRate(), ExceptionMessages::InclusiveBound,
                  AudioUtilities::maxAudioBufferSampleRate(), ExceptionMessages::InclusiveBound));
          return nullptr;
      }
  
      OfflineAudioContext* audioContext = adoptRefCountedGarbageCollectedWillBeNoop(new OfflineAudioContext(document, numberOfChannels, numberOfFrames, sampleRate));
  
      if (!audioContext->destination()) {
          exceptionState.throwDOMException(
              NotSupportedError,
              "OfflineAudioContext(" + String::number(numberOfChannels)
              + ", " + String::number(numberOfFrames)
              + ", " + String::number(sampleRate)
              + ")");
      }
  
      audioContext->suspendIfNeeded();
      return audioContext;
  }
  
  OfflineAudioContext::OfflineAudioContext(Document* document, unsigned numberOfChannels, size_t numberOfFrames, float sampleRate)
      : AudioContext(document, numberOfChannels, numberOfFrames, sampleRate)
  {
  }
  
  OfflineAudioContext::~OfflineAudioContext()
  {
  }
  
  } // namespace blink
  
  #endif // ENABLE(WEB_AUDIO)
  