1/* 2 * Copyright (C) 2010, 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 "AudioContext.h" 30 31#include "AudioBuffer.h" 32#include "JSArrayBuffer.h" 33#include "JSAudioBuffer.h" 34#include "JSAudioContext.h" 35#include "JSOfflineAudioContext.h" 36#include "OfflineAudioContext.h" 37#include <runtime/Error.h> 38#include <wtf/ArrayBuffer.h> 39 40using namespace JSC; 41 42namespace WebCore { 43 44EncodedJSValue JSC_HOST_CALL JSAudioContextConstructor::constructJSAudioContext(ExecState* exec) 45{ 46 JSAudioContextConstructor* jsConstructor = jsCast<JSAudioContextConstructor*>(exec->callee()); 47 if (!jsConstructor) 48 return throwVMError(exec, createReferenceError(exec, "AudioContext constructor callee is unavailable")); 49 50 ScriptExecutionContext* scriptExecutionContext = jsConstructor->scriptExecutionContext(); 51 if (!scriptExecutionContext) 52 return throwVMError(exec, createReferenceError(exec, "AudioContext constructor script execution context is unavailable")); 53 54 if (!scriptExecutionContext->isDocument()) 55 return throwVMError(exec, createReferenceError(exec, "AudioContext constructor called in a script execution context which is not a document")); 56 57 Document* document = toDocument(scriptExecutionContext); 58 59 RefPtr<AudioContext> audioContext; 60 61 if (!exec->argumentCount()) { 62 // Constructor for default AudioContext which talks to audio hardware. 63 ExceptionCode ec = 0; 64 audioContext = AudioContext::create(document, ec); 65 if (ec) { 66 setDOMException(exec, ec); 67 return JSValue::encode(JSValue()); 68 } 69 if (!audioContext.get()) 70 return throwVMError(exec, createSyntaxError(exec, "audio resources unavailable for AudioContext construction")); 71 } else { 72#if ENABLE(LEGACY_WEB_AUDIO) 73 // Constructor for offline (render-target) AudioContext which renders into an AudioBuffer. 74 // new AudioContext(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate); 75 document->addConsoleMessage(JSMessageSource, WarningMessageLevel, 76 "Deprecated AudioContext constructor: use OfflineAudioContext instead"); 77 78 if (exec->argumentCount() < 3) 79 return throwVMError(exec, createNotEnoughArgumentsError(exec)); 80 81 int32_t numberOfChannels = exec->argument(0).toInt32(exec); 82 int32_t numberOfFrames = exec->argument(1).toInt32(exec); 83 float sampleRate = exec->argument(2).toFloat(exec); 84 85 if (numberOfChannels <= 0 || numberOfChannels > 10) 86 return throwVMError(exec, createSyntaxError(exec, "Invalid number of channels")); 87 88 if (numberOfFrames <= 0) 89 return throwVMError(exec, createSyntaxError(exec, "Invalid number of frames")); 90 91 if (sampleRate <= 0) 92 return throwVMError(exec, createSyntaxError(exec, "Invalid sample rate")); 93 94 95 ExceptionCode ec = 0; 96 audioContext = OfflineAudioContext::create(document, numberOfChannels, numberOfFrames, sampleRate, ec); 97 if (ec) { 98 setDOMException(exec, ec); 99 return throwVMError(exec, createSyntaxError(exec, "Error creating OfflineAudioContext")); 100 } 101#else 102 return throwVMError(exec, createSyntaxError(exec, "Illegal AudioContext constructor")); 103#endif 104 } 105 106 if (!audioContext.get()) 107 return throwVMError(exec, createReferenceError(exec, "Error creating AudioContext")); 108 109 return JSValue::encode(CREATE_DOM_WRAPPER(exec, jsConstructor->globalObject(), AudioContext, audioContext.get())); 110} 111 112} // namespace WebCore 113 114#endif // ENABLE(WEB_AUDIO) 115