gecko/content/media/nsDOMMediaStream.h

61 lines
2.0 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 NSDOMMEDIASTREAM_H_
#define NSDOMMEDIASTREAM_H_
#include "nsIDOMMediaStream.h"
#include "MediaStreamGraph.h"
#include "nsCycleCollectionParticipant.h"
#include "nsIPrincipal.h"
/**
* DOM wrapper for MediaStreams.
*/
class nsDOMMediaStream : public nsIDOMMediaStream
{
typedef mozilla::MediaStream MediaStream;
public:
nsDOMMediaStream() : mStream(nsnull) {}
virtual ~nsDOMMediaStream();
NS_DECL_CYCLE_COLLECTION_CLASS(nsDOMMediaStream)
NS_DECL_CYCLE_COLLECTING_ISUPPORTS
NS_DECL_NSIDOMMEDIASTREAM
MediaStream* GetStream() { return mStream; }
bool IsFinished() { return !mStream || mStream->IsFinished(); }
/**
* Returns a principal indicating who may access this stream. The stream contents
* can only be accessed by principals subsuming this principal.
*/
nsIPrincipal* GetPrincipal() { return mPrincipal; }
/**
* Indicate that data will be contributed to this stream from origin aPrincipal.
* If aPrincipal is null, this is ignored. Otherwise, from now on the contents
* of this stream can only be accessed by principals that subsume aPrincipal.
* Returns true if the stream's principal changed.
*/
bool CombineWithPrincipal(nsIPrincipal* aPrincipal);
/**
* Create an nsDOMMediaStream whose underlying stream is a SourceMediaStream.
*/
static already_AddRefed<nsDOMMediaStream> CreateInputStream();
protected:
// MediaStream is owned by the graph, but we tell it when to die, and it won't
// die until we let it.
MediaStream* mStream;
// Principal identifying who may access the contents of this stream.
// If null, this stream can be used by anyone because it has no content yet.
nsCOMPtr<nsIPrincipal> mPrincipal;
};
#endif /* NSDOMMEDIASTREAM_H_ */