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; 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/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) 102