зеркало из https://github.com/mozilla/gecko-dev.git
112 строки
3.0 KiB
C++
112 строки
3.0 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
|
|
/* 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 mozilla_dom_CanvasCaptureMediaStream_h_
|
|
#define mozilla_dom_CanvasCaptureMediaStream_h_
|
|
|
|
#include "DOMMediaStream.h"
|
|
#include "StreamBuffer.h"
|
|
|
|
namespace mozilla {
|
|
class DOMMediaStream;
|
|
class MediaStreamListener;
|
|
class SourceMediaStream;
|
|
|
|
namespace layers {
|
|
class Image;
|
|
} // namespace layers
|
|
|
|
namespace dom {
|
|
class CanvasCaptureMediaStream;
|
|
class HTMLCanvasElement;
|
|
|
|
class OutputStreamDriver
|
|
{
|
|
public:
|
|
OutputStreamDriver(CanvasCaptureMediaStream* aDOMStream,
|
|
const TrackID& aTrackId);
|
|
|
|
NS_INLINE_DECL_THREADSAFE_REFCOUNTING(OutputStreamDriver);
|
|
|
|
nsresult Start();
|
|
|
|
virtual void ForgetDOMStream();
|
|
|
|
virtual void RequestFrame() { }
|
|
|
|
CanvasCaptureMediaStream* DOMStream() const { return mDOMStream; }
|
|
|
|
protected:
|
|
virtual ~OutputStreamDriver();
|
|
class StreamListener;
|
|
|
|
/*
|
|
* Appends mImage to video track for the desired duration.
|
|
*/
|
|
void AppendToTrack(StreamTime aDuration);
|
|
void NotifyPull(StreamTime aDesiredTime);
|
|
|
|
/*
|
|
* Sub classes can SetImage() to update the image being appended to the
|
|
* output stream. It will be appended on the next NotifyPull from MSG.
|
|
*/
|
|
void SetImage(layers::Image* aImage);
|
|
|
|
/*
|
|
* Called in main thread stable state to initialize sub classes.
|
|
*/
|
|
virtual void StartInternal() = 0;
|
|
|
|
private:
|
|
// This is a raw pointer to avoid a reference cycle between OutputStreamDriver
|
|
// and CanvasCaptureMediaStream. ForgetDOMStream() will be called by
|
|
// ~CanvasCaptureMediaStream() to make sure we don't do anything illegal.
|
|
CanvasCaptureMediaStream* mDOMStream;
|
|
nsRefPtr<SourceMediaStream> mSourceStream;
|
|
bool mStarted;
|
|
nsRefPtr<StreamListener> mStreamListener;
|
|
const TrackID mTrackId;
|
|
|
|
// The below members are protected by mMutex.
|
|
Mutex mMutex;
|
|
nsRefPtr<layers::Image> mImage;
|
|
};
|
|
|
|
class CanvasCaptureMediaStream: public DOMMediaStream
|
|
{
|
|
public:
|
|
explicit CanvasCaptureMediaStream(HTMLCanvasElement* aCanvas);
|
|
|
|
NS_DECL_ISUPPORTS_INHERITED
|
|
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CanvasCaptureMediaStream, DOMMediaStream)
|
|
|
|
nsresult Init(const dom::Optional<double>& aFPS, const TrackID& aTrackId);
|
|
|
|
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
|
|
|
|
// WebIDL
|
|
HTMLCanvasElement* Canvas() const { return mCanvas; }
|
|
void RequestFrame();
|
|
|
|
/**
|
|
* Create a CanvasCaptureMediaStream whose underlying stream is a SourceMediaStream.
|
|
*/
|
|
static already_AddRefed<CanvasCaptureMediaStream>
|
|
CreateSourceStream(nsIDOMWindow* aWindow,
|
|
HTMLCanvasElement* aCanvas);
|
|
|
|
protected:
|
|
~CanvasCaptureMediaStream();
|
|
|
|
private:
|
|
nsRefPtr<HTMLCanvasElement> mCanvas;
|
|
nsRefPtr<OutputStreamDriver> mOutputStreamDriver;
|
|
};
|
|
|
|
} // namespace dom
|
|
} // namespace mozilla
|
|
|
|
#endif /* mozilla_dom_CanvasCaptureMediaStream_h_ */
|