mirror of
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128 lines
4.2 KiB
C++
128 lines
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-*/
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef NSDOMMEDIASTREAM_H_
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#define NSDOMMEDIASTREAM_H_
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#include "nsIDOMMediaStream.h"
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#include "MediaStreamGraph.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsIPrincipal.h"
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class nsXPCClassInfo;
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// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
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// GetTickCount() and conflicts with NS_DECL_NSIDOMMEDIASTREAM, containing
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// currentTime getter.
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#ifdef GetCurrentTime
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#undef GetCurrentTime
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#endif
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/**
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* DOM wrapper for MediaStreams.
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*/
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class nsDOMMediaStream : public nsIDOMMediaStream
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{
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friend class nsDOMLocalMediaStream;
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public:
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typedef mozilla::MediaStream MediaStream;
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typedef mozilla::MediaStreamGraph MediaStreamGraph;
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nsDOMMediaStream() : mStream(nullptr), mHintContents(0) {}
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virtual ~nsDOMMediaStream();
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NS_DECL_CYCLE_COLLECTION_CLASS(nsDOMMediaStream)
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NS_DECL_CYCLE_COLLECTING_ISUPPORTS
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NS_DECL_NSIDOMMEDIASTREAM
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MediaStream* GetStream() { return mStream; }
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bool IsFinished() { return !mStream || mStream->IsFinished(); }
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/**
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* Returns a principal indicating who may access this stream. The stream contents
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* can only be accessed by principals subsuming this principal.
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*/
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nsIPrincipal* GetPrincipal() { return mPrincipal; }
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/**
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* Indicate that data will be contributed to this stream from origin aPrincipal.
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* If aPrincipal is null, this is ignored. Otherwise, from now on the contents
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* of this stream can only be accessed by principals that subsume aPrincipal.
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* Returns true if the stream's principal changed.
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*/
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bool CombineWithPrincipal(nsIPrincipal* aPrincipal);
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/**
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* Create an nsDOMMediaStream whose underlying stream is a SourceMediaStream.
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*/
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static already_AddRefed<nsDOMMediaStream> CreateSourceStream(uint32_t aHintContents);
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// Hints to tell the SDP generator about whether this
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// MediaStream probably has audio and/or video
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enum {
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HINT_CONTENTS_AUDIO = 0x00000001U,
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HINT_CONTENTS_VIDEO = 0x00000002U
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};
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uint32_t GetHintContents() const { return mHintContents; }
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void SetHintContents(uint32_t aHintContents) { mHintContents = aHintContents; }
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/**
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* Create an nsDOMMediaStream whose underlying stream is a TrackUnionStream.
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*/
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static already_AddRefed<nsDOMMediaStream> CreateTrackUnionStream(uint32_t aHintContents = 0);
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protected:
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void InitSourceStream(uint32_t aHintContents)
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{
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SetHintContents(aHintContents);
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MediaStreamGraph* gm = MediaStreamGraph::GetInstance();
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mStream = gm->CreateSourceStream(this);
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}
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void InitTrackUnionStream(uint32_t aHintContents)
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{
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SetHintContents(aHintContents);
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MediaStreamGraph* gm = MediaStreamGraph::GetInstance();
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mStream = gm->CreateTrackUnionStream(this);
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}
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// MediaStream is owned by the graph, but we tell it when to die, and it won't
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// die until we let it.
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MediaStream* mStream;
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// Principal identifying who may access the contents of this stream.
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// If null, this stream can be used by anyone because it has no content yet.
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nsCOMPtr<nsIPrincipal> mPrincipal;
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// tells the SDP generator about whether this
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// MediaStream probably has audio and/or video
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uint32_t mHintContents;
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};
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class nsDOMLocalMediaStream : public nsDOMMediaStream,
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public nsIDOMLocalMediaStream
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{
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public:
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nsDOMLocalMediaStream() {}
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virtual ~nsDOMLocalMediaStream();
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(nsDOMLocalMediaStream, nsDOMMediaStream)
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NS_DECL_NSIDOMLOCALMEDIASTREAM
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NS_FORWARD_NSIDOMMEDIASTREAM(nsDOMMediaStream::)
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/**
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* Create an nsDOMLocalMediaStream whose underlying stream is a SourceMediaStream.
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*/
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static already_AddRefed<nsDOMLocalMediaStream> CreateSourceStream(uint32_t aHintContents);
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/**
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* Create an nsDOMLocalMediaStream whose underlying stream is a TrackUnionStream.
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*/
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static already_AddRefed<nsDOMLocalMediaStream> CreateTrackUnionStream(uint32_t aHintContents = 0);
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};
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#endif /* NSDOMMEDIASTREAM_H_ */
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