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      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 "V8AudioBuffer.h"
     32 #include "V8OfflineAudioContext.h"
     33 #include "bindings/v8/V8Binding.h"
     34 #include "bindings/v8/custom/V8ArrayBufferCustom.h"
     35 #include "core/dom/Document.h"
     36 #include "core/page/Frame.h"
     37 #include "modules/webaudio/AudioBuffer.h"
     38 #include "modules/webaudio/AudioContext.h"
     39 #include "modules/webaudio/OfflineAudioContext.h"
     40 #include "wtf/ArrayBuffer.h"
     41 
     42 namespace WebCore {
     43 
     44 void V8AudioContext::constructorCustom(const v8::FunctionCallbackInfo<v8::Value>& args)
     45 {
     46     Document* document = currentDocument();
     47 
     48     RefPtr<AudioContext> audioContext;
     49 
     50     if (!args.Length()) {
     51         // Constructor for default AudioContext which talks to audio hardware.
     52         audioContext = AudioContext::create(document);
     53         if (!audioContext.get()) {
     54             throwError(v8SyntaxError, "audio resources unavailable for AudioContext construction", args.GetIsolate());
     55             return;
     56         }
     57     } else {
     58         // Constructor for offline (render-target) AudioContext which renders into an AudioBuffer.
     59         // new AudioContext(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate);
     60         document->addConsoleMessage(JSMessageSource, WarningMessageLevel,
     61             "Deprecated AudioContext constructor: use OfflineAudioContext instead");
     62 
     63         V8OfflineAudioContext::constructorCallback(args);
     64         return;
     65     }
     66 
     67     if (!audioContext.get()) {
     68         throwError(v8SyntaxError, "Error creating AudioContext", args.GetIsolate());
     69         return;
     70     }
     71 
     72     // Transform the holder into a wrapper object for the audio context.
     73     v8::Handle<v8::Object> wrapper = args.Holder();
     74     V8DOMWrapper::associateObjectWithWrapper<V8AudioContext>(audioContext.release(), &info, wrapper, args.GetIsolate(), WrapperConfiguration::Dependent);
     75     args.GetReturnValue().Set(wrapper);
     76 }
     77 
     78 } // namespace WebCore
     79 
     80 #endif // ENABLE(WEB_AUDIO)
     81