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
constructorCallback(const v8::Arguments & args)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
createBufferCallback(const v8::Arguments & args)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