EncodedJSValue JSC_HOST_CALL JSAudioContextConstructor::constructJSAudioContext(ExecState* exec)
{
JSAudioContextConstructor* jsConstructor = jsCast<JSAudioContextConstructor*>(exec->callee());
if (!jsConstructor)
return throwVMError(exec, createReferenceError(exec, "AudioContext constructor callee is unavailable"));
ScriptExecutionContext* scriptExecutionContext = jsConstructor->scriptExecutionContext();
if (!scriptExecutionContext)
return throwVMError(exec, createReferenceError(exec, "AudioContext constructor script execution context is unavailable"));
if (!scriptExecutionContext->isDocument())
return throwVMError(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.
ExceptionCode ec = 0;
audioContext = AudioContext::create(document, ec);
if (ec) {
setDOMException(exec, ec);
return JSValue::encode(JSValue());
}
if (!audioContext.get())
return throwVMError(exec, createSyntaxError(exec, "audio resources unavailable for AudioContext construction"));
} 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 throwVMError(exec, createNotEnoughArgumentsError(exec));
int32_t numberOfChannels = exec->argument(0).toInt32(exec);
int32_t numberOfFrames = exec->argument(1).toInt32(exec);
float sampleRate = exec->argument(2).toFloat(exec);
if (numberOfChannels <= 0 || numberOfChannels > 10)
return throwVMError(exec, createSyntaxError(exec, "Invalid number of channels"));
if (numberOfFrames <= 0)
return throwVMError(exec, createSyntaxError(exec, "Invalid number of frames"));
if (sampleRate <= 0)
return throwVMError(exec, createSyntaxError(exec, "Invalid sample rate"));
ExceptionCode ec = 0;
audioContext = AudioContext::createOfflineContext(document, numberOfChannels, numberOfFrames, sampleRate, ec);
if (ec) {
setDOMException(exec, ec);
return throwVMError(exec, createSyntaxError(exec, "Error creating OfflineAudioContext"));
}
}
if (!audioContext.get())
return throwVMError(exec, createReferenceError(exec, "Error creating AudioContext"));
return JSValue::encode(CREATE_DOM_WRAPPER(exec, jsConstructor->globalObject(), AudioContext, audioContext.get()));
}
EncodedJSValue JSC_HOST_CALL JSAudioContextConstructor::constructJSAudioContext(ExecState* exec)
{
JSAudioContextConstructor* jsConstructor = jsCast<JSAudioContextConstructor*>(exec->callee());
if (!jsConstructor)
return throwVMError(exec, createReferenceError(exec, "AudioContext constructor callee is unavailable"));
ScriptExecutionContext* scriptExecutionContext = jsConstructor->scriptExecutionContext();
if (!scriptExecutionContext)
return throwVMError(exec, createReferenceError(exec, "AudioContext constructor script execution context is unavailable"));
if (!scriptExecutionContext->isDocument())
return throwVMError(exec, createReferenceError(exec, "AudioContext constructor called in a script execution context which is not a document"));
Document& document = toDocument(*scriptExecutionContext);
RefPtr<AudioContext> audioContext;
if (!exec->argumentCount()) {
// Constructor for default AudioContext which talks to audio hardware.
ExceptionCode ec = 0;
audioContext = AudioContext::create(document, ec);
if (ec) {
setDOMException(exec, ec);
return JSValue::encode(JSValue());
}
if (!audioContext.get())
return throwVMError(exec, createSyntaxError(exec, "audio resources unavailable for AudioContext construction"));
} else {
#if ENABLE(LEGACY_WEB_AUDIO)
// Constructor for offline (render-target) AudioContext which renders into an AudioBuffer.
// new AudioContext(in unsigned long numberOfChannels, in unsigned long numberOfFrames, in float sampleRate);
document.addConsoleMessage(MessageSource::JS, MessageLevel::Warning, ASCIILiteral("Deprecated AudioContext constructor: use OfflineAudioContext instead"));
if (exec->argumentCount() < 3)
return throwVMError(exec, createNotEnoughArgumentsError(exec));
int32_t numberOfChannels = exec->argument(0).toInt32(exec);
int32_t numberOfFrames = exec->argument(1).toInt32(exec);
float sampleRate = exec->argument(2).toFloat(exec);
if (numberOfChannels <= 0 || numberOfChannels > 10)
return throwVMError(exec, createSyntaxError(exec, "Invalid number of channels"));
if (numberOfFrames <= 0)
return throwVMError(exec, createSyntaxError(exec, "Invalid number of frames"));
if (sampleRate <= 0)
return throwVMError(exec, createSyntaxError(exec, "Invalid sample rate"));
ExceptionCode ec = 0;
audioContext = OfflineAudioContext::create(document, numberOfChannels, numberOfFrames, sampleRate, ec);
if (ec) {
setDOMException(exec, ec);
return throwVMError(exec, createSyntaxError(exec, "Error creating OfflineAudioContext"));
}
#else
return throwVMError(exec, createSyntaxError(exec, "Illegal AudioContext constructor"));
#endif
}
if (!audioContext.get())
return throwVMError(exec, createReferenceError(exec, "Error creating AudioContext"));
return JSValue::encode(CREATE_DOM_WRAPPER(jsConstructor->globalObject(), AudioContext, audioContext.get()));
}
