gecko-dev/dom/media/webaudio/AudioProcessingEvent.cpp

65 строки
2.0 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "AudioProcessingEvent.h"
#include "mozilla/dom/AudioProcessingEventBinding.h"
#include "mozilla/dom/ScriptSettings.h"
#include "AudioContext.h"
namespace mozilla {
namespace dom {
NS_IMPL_CYCLE_COLLECTION_INHERITED(AudioProcessingEvent, Event,
mInputBuffer, mOutputBuffer, mNode)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(AudioProcessingEvent)
NS_INTERFACE_MAP_END_INHERITING(Event)
NS_IMPL_ADDREF_INHERITED(AudioProcessingEvent, Event)
NS_IMPL_RELEASE_INHERITED(AudioProcessingEvent, Event)
AudioProcessingEvent::AudioProcessingEvent(ScriptProcessorNode* aOwner,
nsPresContext* aPresContext,
WidgetEvent* aEvent)
: Event(aOwner, aPresContext, aEvent)
, mPlaybackTime(0.0)
, mNode(aOwner)
{
}
AudioProcessingEvent::~AudioProcessingEvent()
{
}
JSObject*
AudioProcessingEvent::WrapObjectInternal(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
{
return AudioProcessingEventBinding::Wrap(aCx, this, aGivenProto);
}
already_AddRefed<AudioBuffer>
AudioProcessingEvent::LazilyCreateBuffer(uint32_t aNumberOfChannels,
ErrorResult& aRv)
{
AutoJSAPI jsapi;
if (NS_WARN_IF(!jsapi.Init(mNode->GetOwner()))) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
JSContext* cx = jsapi.cx();
nsRefPtr<AudioBuffer> buffer =
AudioBuffer::Create(mNode->Context(), aNumberOfChannels,
mNode->BufferSize(),
mNode->Context()->SampleRate(), cx, aRv);
MOZ_ASSERT(buffer || aRv.ErrorCodeIs(NS_ERROR_OUT_OF_MEMORY));
return buffer.forget();
}
} // namespace dom
} // namespace mozilla