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 "V8AudioContext.h" 30 31 #include "ArrayBuffer.h" 32 #include "AudioBuffer.h" 33 #include "AudioContext.h" 34 #include "Frame.h" 35 #include "V8ArrayBuffer.h" 36 #include "V8AudioBuffer.h" 37 #include "V8Binding.h" 38 #include "V8Proxy.h" 39 40 namespace WebCore { 41 42 v8::Handle<v8::Value> V8AudioContext::constructorCallback(const v8::Arguments& args) 43 { 44 INC_STATS("DOM.AudioContext.Contructor"); 45 46 Frame* frame = V8Proxy::retrieveFrameForCurrentContext(); 47 if (!frame) 48 return throwError("AudioContext constructor associated frame is unavailable", V8Proxy::ReferenceError); 49 50 Document* document = frame->document(); 51 if (!document) 52 return throwError("AudioContext constructor associated document is unavailable", V8Proxy::ReferenceError); 53 54 RefPtr<AudioContext> audioContext; 55 56 if (!args.Length()) { 57 // Constructor for default AudioContext which talks to audio hardware. 58 audioContext = AudioContext::create(document); 59 } else { 60 // Constructor for offline (render-target) AudioContext which renders into an AudioBuffer. 61 // new AudioContext(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate); 62 if (args.Length() < 3) 63 return throwError("Not enough arguments", V8Proxy::SyntaxError); 64 65 bool ok = false; 66 67 unsigned numberOfChannels = toInt32(args[0], ok); 68 if (!ok) 69 return throwError("Invalid number of channels", V8Proxy::SyntaxError); 70 71 unsigned numberOfFrames = toInt32(args[1], ok); 72 if (!ok) 73 return throwError("Invalid number of frames", V8Proxy::SyntaxError); 74 75 float sampleRate = toFloat(args[2]); 76 77 audioContext = AudioContext::createOfflineContext(document, numberOfChannels, numberOfFrames, sampleRate); 78 } 79 80 if (!audioContext.get()) 81 return throwError("Error creating AudioContext", V8Proxy::SyntaxError); 82 83 // Transform the holder into a wrapper object for the audio context. 84 V8DOMWrapper::setDOMWrapper(args.Holder(), &info, audioContext.get()); 85 audioContext->ref(); 86 87 return args.Holder(); 88 } 89 90 v8::Handle<v8::Value> V8AudioContext::createBufferCallback(const v8::Arguments& args) 91 { 92 if (args.Length() < 2) 93 return throwError("Not enough arguments", V8Proxy::SyntaxError); 94 95 AudioContext* audioContext = toNative(args.Holder()); 96 ASSERT(audioContext); 97 98 v8::Handle<v8::Value> arg = args[0]; 99 100 // AudioBuffer createBuffer(in ArrayBuffer buffer, in boolean mixToMono); 101 if (V8ArrayBuffer::HasInstance(arg)) { 102 v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(arg); 103 ArrayBuffer* arrayBuffer = V8ArrayBuffer::toNative(object); 104 ASSERT(arrayBuffer); 105 106 if (arrayBuffer) { 107 bool mixToMono = args[1]->ToBoolean()->Value(); 108 109 RefPtr<AudioBuffer> audioBuffer = audioContext->createBuffer(arrayBuffer, mixToMono); 110 if (!audioBuffer.get()) 111 return throwError("Error decoding audio file data", V8Proxy::SyntaxError); 112 113 return toV8(audioBuffer.get()); 114 } 115 116 return v8::Undefined(); 117 } 118 119 // AudioBuffer createBuffer(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate); 120 if (args.Length() < 3) 121 return throwError("Not enough arguments", V8Proxy::SyntaxError); 122 123 bool ok = false; 124 125 unsigned numberOfChannels = toInt32(args[0], ok); 126 if (!ok) 127 return throwError("Invalid number of channels", V8Proxy::SyntaxError); 128 129 unsigned numberOfFrames = toInt32(args[1], ok); 130 if (!ok) 131 return throwError("Invalid number of frames", V8Proxy::SyntaxError); 132 133 float sampleRate = toFloat(args[2]); 134 135 RefPtr<AudioBuffer> audioBuffer = audioContext->createBuffer(numberOfChannels, numberOfFrames, sampleRate); 136 if (!audioBuffer.get()) 137 return throwError("Error creating AudioBuffer", V8Proxy::SyntaxError); 138 139 return toV8(audioBuffer.get()); 140 } 141 142 } // namespace WebCore 143 144 #endif // ENABLE(WEB_AUDIO) 145
