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/*
* Copyright (C) 2010, Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(WEB_AUDIO)
#include "V8AudioContext.h"
#include "ArrayBuffer.h"
#include "AudioBuffer.h"
#include "AudioContext.h"
#include "Frame.h"
#include "V8ArrayBuffer.h"
#include "V8AudioBuffer.h"
#include "V8Binding.h"
#include "V8Proxy.h"
namespace WebCore {
v8::Handle<v8::Value> V8AudioContext::constructorCallback(const v8::Arguments& args)
{
INC_STATS("DOM.AudioContext.Contructor");
Frame* frame = V8Proxy::retrieveFrameForCurrentContext();
if (!frame)
return throwError("AudioContext constructor associated frame is unavailable", V8Proxy::ReferenceError);
Document* document = frame->document();
if (!document)
return throwError("AudioContext constructor associated document is unavailable", V8Proxy::ReferenceError);
RefPtr<AudioContext> audioContext;
if (!args.Length()) {
// Constructor for default AudioContext which talks to audio hardware.
audioContext = AudioContext::create(document);
} else {
// Constructor for offline (render-target) AudioContext which renders into an AudioBuffer.
// new AudioContext(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate);
if (args.Length() < 3)
return throwError("Not enough arguments", V8Proxy::SyntaxError);
bool ok = false;
unsigned numberOfChannels = toInt32(args[0], ok);
if (!ok)
return throwError("Invalid number of channels", V8Proxy::SyntaxError);
unsigned numberOfFrames = toInt32(args[1], ok);
if (!ok)
return throwError("Invalid number of frames", V8Proxy::SyntaxError);
float sampleRate = toFloat(args[2]);
audioContext = AudioContext::createOfflineContext(document, numberOfChannels, numberOfFrames, sampleRate);
}
if (!audioContext.get())
return throwError("Error creating AudioContext", V8Proxy::SyntaxError);
// Transform the holder into a wrapper object for the audio context.
V8DOMWrapper::setDOMWrapper(args.Holder(), &info, audioContext.get());
audioContext->ref();
return args.Holder();
}
v8::Handle<v8::Value> V8AudioContext::createBufferCallback(const v8::Arguments& args)
{
if (args.Length() < 2)
return throwError("Not enough arguments", V8Proxy::SyntaxError);
AudioContext* audioContext = toNative(args.Holder());
ASSERT(audioContext);
v8::Handle<v8::Value> arg = args[0];
// AudioBuffer createBuffer(in ArrayBuffer buffer, in boolean mixToMono);
if (V8ArrayBuffer::HasInstance(arg)) {
v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(arg);
ArrayBuffer* arrayBuffer = V8ArrayBuffer::toNative(object);
ASSERT(arrayBuffer);
if (arrayBuffer) {
bool mixToMono = args[1]->ToBoolean()->Value();
RefPtr<AudioBuffer> audioBuffer = audioContext->createBuffer(arrayBuffer, mixToMono);
if (!audioBuffer.get())
return throwError("Error decoding audio file data", V8Proxy::SyntaxError);
return toV8(audioBuffer.get());
}
return v8::Undefined();
}
// AudioBuffer createBuffer(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate);
if (args.Length() < 3)
return throwError("Not enough arguments", V8Proxy::SyntaxError);
bool ok = false;
unsigned numberOfChannels = toInt32(args[0], ok);
if (!ok)
return throwError("Invalid number of channels", V8Proxy::SyntaxError);
unsigned numberOfFrames = toInt32(args[1], ok);
if (!ok)
return throwError("Invalid number of frames", V8Proxy::SyntaxError);
float sampleRate = toFloat(args[2]);
RefPtr<AudioBuffer> audioBuffer = audioContext->createBuffer(numberOfChannels, numberOfFrames, sampleRate);
if (!audioBuffer.get())
return throwError("Error creating AudioBuffer", V8Proxy::SyntaxError);
return toV8(audioBuffer.get());
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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