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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 "AudioContext.h"
#include "ArrayBuffer.h"
#include "AudioBuffer.h"
#include "JSArrayBuffer.h"
#include "JSAudioBuffer.h"
#include "JSAudioContext.h"
#include <runtime/Error.h>
using namespace JSC;
namespace WebCore {
EncodedJSValue JSC_HOST_CALL JSAudioContextConstructor::constructJSAudioContext(ExecState* exec)
{
JSAudioContextConstructor* jsConstructor = static_cast<JSAudioContextConstructor*>(exec->callee());
if (!jsConstructor)
return throwError(exec, createReferenceError(exec, "AudioContext constructor callee is unavailable"));
ScriptExecutionContext* scriptExecutionContext = jsConstructor->scriptExecutionContext();
if (!scriptExecutionContext)
return throwError(exec, createReferenceError(exec, "AudioContext constructor script execution context is unavailable"));
if (!scriptExecutionContext->isDocument())
return throwError(exec, createReferenceError(exec, "AudioContext constructor called in a script execution context which is not a document"));
Document* document = static_cast<Document*>(scriptExecutionContext);
RefPtr<AudioContext> audioContext;
if (!exec->argumentCount()) {
// 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 (exec->argumentCount() < 3)
return throwError(exec, createSyntaxError(exec, "Not enough arguments"));
unsigned numberOfChannels = exec->argument(0).toInt32(exec);
unsigned numberOfFrames = exec->argument(1).toInt32(exec);
float sampleRate = exec->argument(2).toFloat(exec);
audioContext = AudioContext::createOfflineContext(document, numberOfChannels, numberOfFrames, sampleRate);
}
if (!audioContext.get())
return throwError(exec, createReferenceError(exec, "Error creating AudioContext"));
return JSValue::encode(asObject(toJS(exec, jsConstructor->globalObject(), audioContext.get())));
}
JSValue JSAudioContext::createBuffer(ExecState* exec)
{
if (exec->argumentCount() < 2)
return throwError(exec, createSyntaxError(exec, "Not enough arguments"));
AudioContext* audioContext = static_cast<AudioContext*>(impl());
ASSERT(audioContext);
// AudioBuffer createBuffer(in ArrayBuffer buffer, in boolean mixToMono);
JSValue val = exec->argument(0);
if (val.inherits(&JSArrayBuffer::s_info)) {
ArrayBuffer* arrayBuffer = toArrayBuffer(val);
ASSERT(arrayBuffer);
if (arrayBuffer) {
bool mixToMono = exec->argument(1).toBoolean(exec);
RefPtr<AudioBuffer> audioBuffer = audioContext->createBuffer(arrayBuffer, mixToMono);
if (!audioBuffer.get())
return throwError(exec, createSyntaxError(exec, "Error decoding audio file data"));
return toJS(exec, globalObject(), audioBuffer.get());
}
return jsUndefined();
}
// AudioBuffer createBuffer(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate);
if (exec->argumentCount() < 3)
return throwError(exec, createSyntaxError(exec, "Not enough arguments"));
unsigned numberOfChannels = exec->argument(0).toInt32(exec);
unsigned numberOfFrames = exec->argument(1).toInt32(exec);
float sampleRate = exec->argument(2).toFloat(exec);
RefPtr<AudioBuffer> audioBuffer = audioContext->createBuffer(numberOfChannels, numberOfFrames, sampleRate);
if (!audioBuffer.get())
return throwError(exec, createSyntaxError(exec, "Error creating AudioBuffer"));
return toJS(exec, globalObject(), audioBuffer.get());
}
} // namespace WebCore
#endif // ENABLE(WEB_AUDIO)
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