gecko-dev/content/media/webaudio/AudioProcessingEvent.h

85 lines
2.1 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/. */
#ifndef AudioProcessingEvent_h_
#define AudioProcessingEvent_h_
#include "nsDOMEvent.h"
#include "AudioBuffer.h"
#include "ScriptProcessorNode.h"
namespace mozilla {
namespace dom {
class AudioProcessingEvent : public nsDOMEvent,
public EnableWebAudioCheck
{
public:
AudioProcessingEvent(ScriptProcessorNode* aOwner,
nsPresContext *aPresContext,
nsEvent *aEvent);
NS_DECL_ISUPPORTS_INHERITED
NS_FORWARD_TO_NSDOMEVENT
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(AudioProcessingEvent, nsDOMEvent)
virtual JSObject* WrapObject(JSContext* aCx,
JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
void InitEvent(AudioBuffer* aInputBuffer,
uint32_t aNumberOfInputChannels,
double aPlaybackTime)
{
InitEvent(NS_LITERAL_STRING("audioprocess"), false, false);
mInputBuffer = aInputBuffer;
mNumberOfInputChannels = aNumberOfInputChannels;
mPlaybackTime = aPlaybackTime;
}
double PlaybackTime() const
{
return mPlaybackTime;
}
AudioBuffer* InputBuffer()
{
if (!mInputBuffer) {
LazilyCreateBuffer(mInputBuffer, mNumberOfInputChannels);
}
return mInputBuffer;
}
AudioBuffer* OutputBuffer()
{
if (!mOutputBuffer) {
LazilyCreateBuffer(mOutputBuffer, mNode->NumberOfOutputChannels());
}
return mOutputBuffer;
}
bool HasOutputBuffer() const
{
return !!mOutputBuffer;
}
private:
void LazilyCreateBuffer(nsRefPtr<AudioBuffer>& aBuffer,
uint32_t aNumberOfChannels);
private:
double mPlaybackTime;
nsRefPtr<AudioBuffer> mInputBuffer;
nsRefPtr<AudioBuffer> mOutputBuffer;
nsRefPtr<ScriptProcessorNode> mNode;
uint32_t mNumberOfInputChannels;
};
}
}
#endif