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gecko-dev/dom/media/DOMMediaStream.h

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/* -*- 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 "ImageContainer.h"
#include "nsCycleCollectionParticipant.h"
#include "nsWrapperCache.h"
#include "StreamBuffer.h"
#include "nsIDOMWindow.h"
#include "nsIPrincipal.h"
#include "mozilla/PeerIdentity.h"
#include "mozilla/DOMEventTargetHelper.h"
#include "mozilla/CORSMode.h"
// GetCurrentTime is defined in winbase.h as zero argument macro forwarding to
// GetTickCount() and conflicts with NS_DECL_NSIDOMMEDIASTREAM, containing
// currentTime getter.
#ifdef GetCurrentTime
#undef GetCurrentTime
#endif
// X11 has a #define for CurrentTime. Unbelievable :-(.
// See dom/media/webaudio/AudioContext.h for more fun!
#ifdef CurrentTime
#undef CurrentTime
#endif
namespace mozilla {
class DOMHwMediaStream;
class DOMLocalMediaStream;
class MediaStream;
class MediaEngineSource;
class MediaInputPort;
class MediaStreamGraph;
class ProcessedMediaStream;
namespace dom {
class AudioNode;
class HTMLCanvasElement;
class MediaStreamTrack;
class AudioStreamTrack;
class VideoStreamTrack;
class AudioTrack;
class VideoTrack;
class AudioTrackList;
class VideoTrackList;
class MediaTrackListListener;
struct MediaTrackConstraints;
} // namespace dom
namespace layers {
class ImageContainer;
class OverlayImage;
} // namespace layers
class MediaStreamDirectListener;
#define NS_DOMMEDIASTREAM_IID \
{ 0x8cb65468, 0x66c0, 0x444e, \
{ 0x89, 0x9f, 0x89, 0x1d, 0x9e, 0xd2, 0xbe, 0x7c } }
/**
* DOM wrapper for MediaStreams.
*
* To account for track operations such as clone(), addTrack() and
* removeTrack(), a DOMMediaStream wraps three internal (and chained)
* MediaStreams:
* 1. mInputStream
* - Controlled by the owner/source of the DOMMediaStream.
* It's a stream of the type indicated by
* - DOMMediaStream::CreateSourceStream/CreateTrackUnionStream. A source
* typically creates its DOMMediaStream, creates the MediaStreamTracks
* owned by said stream, then gets the internal input stream to which it
* feeds data for the previously created tracks.
* - When necessary it can create tracks on the internal stream only and
* their corresponding MediaStreamTracks will be asynchronously created.
* 2. mOwnedStream
* - A TrackUnionStream containing tracks owned by this stream.
* - The internal model of a MediaStreamTrack consists of its owning
* DOMMediaStream and the TrackID of the corresponding internal track in
* the owning DOMMediaStream's mOwnedStream.
* - The owned stream is different from the input stream since a cloned
* DOMMediaStream is also the owner of its (cloned) MediaStreamTracks.
* - Stopping an original track shall not stop its clone. This is
* solved by stopping it at the owned stream, while the clone's owned
* stream gets data directly from the original input stream.
* - A DOMMediaStream (original or clone) gets all tracks dynamically
* added by the source automatically forwarded by having a TRACK_ANY
* MediaInputPort set up from the owning DOMMediaStream's input stream
* to this DOMMediaStream's owned stream.
* 3. mPlaybackStream
* - A TrackUnionStream containing the tracks corresponding to the
* MediaStreamTracks currently in this DOMMediaStream (per getTracks()).
* - Similarly as for mOwnedStream, there's a TRACK_ANY MediaInputPort set
* up from the owned stream to the playback stream to allow tracks
* dynamically added by the source to be automatically forwarded to any
* audio or video sinks.
* - MediaStreamTracks added by addTrack() are set up with a MediaInputPort
* locked to their internal TrackID, from their owning DOMMediaStream's
* owned stream to this playback stream.
*
*
* A graphical representation of how tracks are connected in various cases as
* follows:
*
* addTrack()ed case:
* DOMStream A
* Input Owned Playback
* t1 ---------> t1 ------------> t1 <- MediaStreamTrack X
* (pointing to t1 in A)
* --------> t2 <- MediaStreamTrack Y
* / (pointing to t1 in B)
* DOMStream B /
* Input Owned / Playback
* t1 ---------> t1 ------------> t1 <- MediaStreamTrack Y
* (pointing to t1 in B)
*
* removeTrack()ed case:
* DOMStream A
* Input Owned Playback
* t1 ---------> t1 <- No tracks
*
*
* clone()d case:
* DOMStream A
* Input Owned Playback
* t1 ---------> t1 ------------> t1 <- MediaStreamTrack X
* \ (pointing to t1 in A)
* -----
* DOMStream B \
* Input \ Owned Playback
* -> t1 ------------> t1 <- MediaStreamTrack Y
* (pointing to t1 in B)
*
*
* addTrack()ed, removeTrack()ed and clone()d case:
*
* Here we have done the following:
* var A = someStreamWithTwoTracks;
* var B = someStreamWithOneTrack;
* var X = A.getTracks()[0];
* var Y = A.getTracks()[1];
* var Z = B.getTracks()[0];
* A.addTrack(Z);
* A.removeTrack(X);
* B.removeTrack(Z);
* var A' = A.clone();
*
* DOMStream A
* Input Owned Playback
* t1 ---------> t1 <- MediaStreamTrack X (removed)
* (pointing to t1 in A)
* t2 ---------> t2 ------------> t2 <- MediaStreamTrack Y
* \ (pointing to t2 in A)
* \ ------> t3 <- MediaStreamTrack Z
* \ / (pointing to t1 in B)
* DOMStream B \ /
* Input \ Owned / Playback
* t1 ---^-----> t1 --- <- MediaStreamTrack Z (removed)
* \ \ (pointing to t1 in B)
* \ \
* DOMStream A' \ \
* Input \ \ Owned Playback
* \ -> t1 ------------> t1 <- MediaStreamTrack Y'
* \ (pointing to t1 in A')
* ----> t2 ------------> t2 <- MediaStreamTrack Z'
* (pointing to t2 in A')
*/
class DOMMediaStream : public DOMEventTargetHelper
{
friend class DOMLocalMediaStream;
typedef dom::MediaStreamTrack MediaStreamTrack;
typedef dom::AudioStreamTrack AudioStreamTrack;
typedef dom::VideoStreamTrack VideoStreamTrack;
typedef dom::AudioTrack AudioTrack;
typedef dom::VideoTrack VideoTrack;
typedef dom::AudioTrackList AudioTrackList;
typedef dom::VideoTrackList VideoTrackList;
public:
typedef dom::MediaTrackConstraints MediaTrackConstraints;
class TrackListener {
NS_INLINE_DECL_REFCOUNTING(TrackListener)
public:
/**
* Called when the DOMMediaStream has a new track added, either by
* JS (addTrack()) or the source creating one.
*/
virtual void
NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack) {};
/**
* Called when the DOMMediaStream removes a track, either by
* JS (removeTrack()) or the source ending it.
*/
virtual void
NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack) {};
protected:
virtual ~TrackListener() {}
};
/**
* TrackPort is a representation of a MediaStreamTrack-MediaInputPort pair
* that make up a link between the Owned stream and the Playback stream.
*
* Semantically, the track is the identifier/key and the port the value of this
* connection.
*
* The input port can be shared between several TrackPorts. This is the case
* for DOMMediaStream's mPlaybackPort which forwards all tracks in its
* mOwnedStream automatically.
*
* If the MediaStreamTrack is owned by another DOMMediaStream (called A) than
* the one owning the TrackPort (called B), the input port (locked to the
* MediaStreamTrack's TrackID) connects A's mOwnedStream to B's mPlaybackStream.
*
* A TrackPort may never leave the DOMMediaStream it was created in. Internal
* use only.
*/
class TrackPort
{
public:
NS_INLINE_DECL_CYCLE_COLLECTING_NATIVE_REFCOUNTING(TrackPort)
NS_DECL_CYCLE_COLLECTION_NATIVE_CLASS(TrackPort)
/**
* Indicates MediaInputPort ownership to the TrackPort.
*
* OWNED - Owned by the TrackPort itself. TrackPort must destroy the
* input port when it's destructed.
* EXTERNAL - Owned by another entity. It's the caller's responsibility to
* ensure the the MediaInputPort outlives the TrackPort.
*/
enum class InputPortOwnership {
OWNED = 1,
EXTERNAL
};
TrackPort(MediaInputPort* aInputPort,
MediaStreamTrack* aTrack,
const InputPortOwnership aOwnership);
protected:
virtual ~TrackPort();
public:
void DestroyInputPort();
/**
* Returns the source stream of the input port.
*/
MediaStream* GetSource() const;
/**
* Returns the track ID this track is locked to in the source stream of the
* input port.
*/
TrackID GetSourceTrackId() const;
MediaInputPort* GetInputPort() const { return mInputPort; }
MediaStreamTrack* GetTrack() const { return mTrack; }
/**
* Blocks aTrackId from going into mInputPort unless the port has been
* destroyed.
*/
void BlockTrackId(TrackID aTrackId);
private:
RefPtr<MediaInputPort> mInputPort;
RefPtr<MediaStreamTrack> mTrack;
// Defines if we've been given ownership of the input port or if it's owned
// externally. The owner is responsible for destroying the port.
const InputPortOwnership mOwnership;
};
DOMMediaStream();
NS_DECL_ISUPPORTS_INHERITED
NS_REALLY_FORWARD_NSIDOMEVENTTARGET(DOMEventTargetHelper)
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DOMMediaStream,
DOMEventTargetHelper)
NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOMMEDIASTREAM_IID)
nsIDOMWindow* GetParentObject() const
{
return mWindow;
}
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
// WebIDL
static already_AddRefed<DOMMediaStream>
Constructor(const dom::GlobalObject& aGlobal,
ErrorResult& aRv);
static already_AddRefed<DOMMediaStream>
Constructor(const dom::GlobalObject& aGlobal,
const DOMMediaStream& aStream,
ErrorResult& aRv);
static already_AddRefed<DOMMediaStream>
Constructor(const dom::GlobalObject& aGlobal,
const dom::Sequence<OwningNonNull<MediaStreamTrack>>& aTracks,
ErrorResult& aRv);
double CurrentTime();
void GetId(nsAString& aID) const;
void GetAudioTracks(nsTArray<RefPtr<AudioStreamTrack> >& aTracks) const;
void GetVideoTracks(nsTArray<RefPtr<VideoStreamTrack> >& aTracks) const;
void GetTracks(nsTArray<RefPtr<MediaStreamTrack> >& aTracks) const;
void AddTrack(MediaStreamTrack& aTrack);
void RemoveTrack(MediaStreamTrack& aTrack);
// NON-WebIDL
/**
* Returns true if this DOMMediaStream has aTrack in its mPlaybackStream.
*/
bool HasTrack(const MediaStreamTrack& aTrack) const;
/**
* Returns true if this DOMMediaStream owns aTrack.
*/
bool OwnsTrack(const MediaStreamTrack& aTrack) const;
/**
* Returns the corresponding MediaStreamTrack if it's in our mOwnedStream.
*/
MediaStreamTrack* FindOwnedDOMTrack(MediaStream* aOwningStream, TrackID aTrackID) const;
/**
* Returns the corresponding MediaStreamTrack if it's in our mPlaybackStream.
*/
MediaStreamTrack* FindPlaybackDOMTrack(MediaStream* aOwningStream, TrackID aTrackID) const;
/**
* Returns the TrackPort connecting mOwnedStream to mPlaybackStream for aTrack.
*/
TrackPort* FindPlaybackTrackPort(const MediaStreamTrack& aTrack) const;
MediaStream* GetInputStream() const { return mInputStream; }
ProcessedMediaStream* GetOwnedStream() const { return mOwnedStream; }
ProcessedMediaStream* GetPlaybackStream() const { return mPlaybackStream; }
/**
* Allows a video element to identify this stream as a camera stream, which
* needs special treatment.
*/
virtual MediaStream* GetCameraStream() const { return nullptr; }
/**
* Overridden in DOMLocalMediaStreams to allow getUserMedia to pass
* data directly to RTCPeerConnection without going through graph queuing.
* Returns a bool to let us know if direct data will be delivered.
*/
virtual bool AddDirectListener(MediaStreamDirectListener *aListener) { return false; }
virtual void RemoveDirectListener(MediaStreamDirectListener *aListener) {}
/**
* Overridden in DOMLocalMediaStreams to allow getUserMedia to disable
* media at the SourceMediaStream.
*/
virtual void SetTrackEnabled(TrackID aTrackID, bool aEnabled);
virtual void StopTrack(TrackID aTrackID);
virtual already_AddRefed<dom::Promise>
ApplyConstraintsToTrack(TrackID aTrackID,
const MediaTrackConstraints& aConstraints,
ErrorResult &aRv);
virtual DOMLocalMediaStream* AsDOMLocalMediaStream() { return nullptr; }
virtual DOMHwMediaStream* AsDOMHwMediaStream() { return nullptr; }
bool 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; }
mozilla::CORSMode GetCORSMode();
void SetCORSMode(mozilla::CORSMode aCORSMode);
/**
* These are used in WebRTC. A peerIdentity constrained MediaStream cannot be sent
* across the network to anything other than a peer with the provided identity.
* If this is set, then mPrincipal should be an instance of nsNullPrincipal.
*/
PeerIdentity* GetPeerIdentity() const { return mPeerIdentity; }
void SetPeerIdentity(PeerIdentity* aPeerIdentity)
{
mPeerIdentity = aPeerIdentity;
}
/**
* 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);
/**
* This is used in WebRTC to move from a protected state (nsNullPrincipal) to
* one where the stream is accessible to script. Don't call this.
* CombineWithPrincipal is almost certainly more appropriate.
*/
void SetPrincipal(nsIPrincipal* aPrincipal);
/**
* Used to learn about dynamic changes in principal occur.
* Operations relating to these observers must be confined to the main thread.
*/
class PrincipalChangeObserver
{
public:
virtual void PrincipalChanged(DOMMediaStream* aMediaStream) = 0;
};
bool AddPrincipalChangeObserver(PrincipalChangeObserver* aObserver);
bool RemovePrincipalChangeObserver(PrincipalChangeObserver* aObserver);
/**
* Called when this stream's MediaStreamGraph has been shut down. Normally
* MSGs are only shut down when all streams have been removed, so this
* will only be called during a forced shutdown due to application exit.
*/
void NotifyMediaStreamGraphShutdown();
/**
* Called when the main-thread state of the MediaStream goes to finished.
*/
void NotifyStreamFinished();
// Webrtc allows the remote side to name a stream whatever it wants, and we
// need to surface this to content.
void AssignId(const nsAString& aID) { mID = aID; }
/**
* Create a DOMMediaStream whose underlying input stream is a SourceMediaStream.
*/
static already_AddRefed<DOMMediaStream> CreateSourceStream(nsIDOMWindow* aWindow,
MediaStreamGraph* aGraph);
/**
* Create a DOMMediaStream whose underlying input stream is a TrackUnionStream.
*/
static already_AddRefed<DOMMediaStream> CreateTrackUnionStream(nsIDOMWindow* aWindow,
MediaStreamGraph* aGraph);
/**
* Create an DOMMediaStream whose underlying input stream is an
* AudioCaptureStream.
*/
static already_AddRefed<DOMMediaStream> CreateAudioCaptureStream(
nsIDOMWindow* aWindow, MediaStreamGraph* aGraph);
void SetLogicalStreamStartTime(StreamTime aTime)
{
mLogicalStreamStartTime = aTime;
}
/**
* Called for each track in our owned stream to indicate to JS that we
* are carrying that track.
*
* Creates a MediaStreamTrack, adds it to mTracks and returns it.
*/
MediaStreamTrack* CreateOwnDOMTrack(TrackID aTrackID, MediaSegment::Type aType);
class OnTracksAvailableCallback {
public:
virtual ~OnTracksAvailableCallback() {}
virtual void NotifyTracksAvailable(DOMMediaStream* aStream) = 0;
};
// When the initial set of tracks has been added, run
// aCallback->NotifyTracksAvailable.
// It is allowed to do anything, including run script.
// aCallback may run immediately during this call if tracks are already
// available!
// We only care about track additions, we'll fire the notification even if
// some of the tracks have been removed.
// Takes ownership of aCallback.
void OnTracksAvailable(OnTracksAvailableCallback* aCallback);
/**
* Add an nsISupports object that this stream will keep alive as long as
* the stream is not finished.
*/
void AddConsumerToKeepAlive(nsISupports* aConsumer)
{
if (!IsFinished() && !mNotifiedOfMediaStreamGraphShutdown) {
mConsumersToKeepAlive.AppendElement(aConsumer);
}
}
void RegisterTrackListener(TrackListener* aListener);
void UnregisterTrackListener(TrackListener* aListener);
protected:
virtual ~DOMMediaStream();
void Destroy();
void InitSourceStream(nsIDOMWindow* aWindow, MediaStreamGraph* aGraph);
void InitTrackUnionStream(nsIDOMWindow* aWindow, MediaStreamGraph* aGraph);
void InitAudioCaptureStream(nsIDOMWindow* aWindow, MediaStreamGraph* aGraph);
// Sets up aStream as mInputStream. A producer may append data to a
// SourceMediaStream input stream, or connect another stream to a
// TrackUnionStream input stream.
void InitInputStreamCommon(MediaStream* aStream, MediaStreamGraph* aGraph);
// Sets up a new TrackUnionStream as mOwnedStream and connects it to
// mInputStream with a TRACK_ANY MediaInputPort if available.
// If this DOMMediaStream should have an input stream (producing data),
// it has to be initiated before the owned stream.
void InitOwnedStreamCommon(MediaStreamGraph* aGraph);
// Sets up a new TrackUnionStream as mPlaybackStream and connects it to
// mOwnedStream with a TRACK_ANY MediaInputPort if available.
// If this DOMMediaStream should have an owned stream (producer or clone),
// it has to be initiated before the playback stream.
void InitPlaybackStreamCommon(MediaStreamGraph* aGraph);
void CheckTracksAvailable();
// Called when MediaStreamGraph has finished an iteration where tracks were
// created.
void NotifyTracksCreated();
// Dispatches NotifyTrackAdded() to all registered track listeners.
void NotifyTrackAdded(const RefPtr<MediaStreamTrack>& aTrack);
// Dispatches NotifyTrackRemoved() to all registered track listeners.
void NotifyTrackRemoved(const RefPtr<MediaStreamTrack>& aTrack);
class OwnedStreamListener;
friend class OwnedStreamListener;
class PlaybackStreamListener;
friend class PlaybackStreamListener;
// XXX Bug 1124630. Remove with CameraPreviewMediaStream.
void CreateAndAddPlaybackStreamListener(MediaStream*);
// StreamTime at which the currentTime attribute would return 0.
StreamTime mLogicalStreamStartTime;
// We need this to track our parent object.
nsCOMPtr<nsIDOMWindow> mWindow;
// MediaStreams are owned by the graph, but we tell them when to die,
// and they won't die until we let them.
// This stream contains tracks used as input by us. Cloning happens from this
// stream. Tracks may exist in these stream but not in |mOwnedStream| if they
// have been stopped.
MediaStream* mInputStream;
// This stream contains tracks owned by us (if we were created directly from
// source, or cloned from some other stream). Tracks map to |mOwnedTracks|.
ProcessedMediaStream* mOwnedStream;
// This stream contains tracks currently played by us, despite of owner.
// Tracks map to |mTracks|.
ProcessedMediaStream* mPlaybackStream;
// This port connects mInputStream to mOwnedStream. All tracks forwarded.
RefPtr<MediaInputPort> mOwnedPort;
// This port connects mOwnedStream to mPlaybackStream. All tracks not
// explicitly blocked due to removal are forwarded.
RefPtr<MediaInputPort> mPlaybackPort;
// MediaStreamTracks corresponding to tracks in our mOwnedStream.
nsAutoTArray<RefPtr<TrackPort>, 2> mOwnedTracks;
// MediaStreamTracks corresponding to tracks in our mPlaybackStream.
nsAutoTArray<RefPtr<TrackPort>, 2> mTracks;
RefPtr<OwnedStreamListener> mOwnedListener;
RefPtr<PlaybackStreamListener> mPlaybackListener;
nsTArray<nsAutoPtr<OnTracksAvailableCallback> > mRunOnTracksAvailable;
// Set to true after MediaStreamGraph has created tracks for mPlaybackStream.
bool mTracksCreated;
nsString mID;
// Keep these alive until the stream finishes
nsTArray<nsCOMPtr<nsISupports> > mConsumersToKeepAlive;
bool mNotifiedOfMediaStreamGraphShutdown;
// The track listeners subscribe to changes in this stream's track set.
nsTArray<RefPtr<TrackListener>> mTrackListeners;
private:
void NotifyPrincipalChanged();
// 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;
nsTArray<PrincipalChangeObserver*> mPrincipalChangeObservers;
// this is used in gUM and WebRTC to identify peers that this stream
// is allowed to be sent to
nsAutoPtr<PeerIdentity> mPeerIdentity;
CORSMode mCORSMode;
};
NS_DEFINE_STATIC_IID_ACCESSOR(DOMMediaStream,
NS_DOMMEDIASTREAM_IID)
#define NS_DOMLOCALMEDIASTREAM_IID \
{ 0xb1437260, 0xec61, 0x4dfa, \
{ 0x92, 0x54, 0x04, 0x44, 0xe2, 0xb5, 0x94, 0x9c } }
class DOMLocalMediaStream : public DOMMediaStream
{
public:
DOMLocalMediaStream() {}
NS_DECL_ISUPPORTS_INHERITED
NS_DECLARE_STATIC_IID_ACCESSOR(NS_DOMLOCALMEDIASTREAM_IID)
virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
void Stop();
virtual MediaEngineSource* GetMediaEngine(TrackID aTrackID) { return nullptr; }
/**
* Create an nsDOMLocalMediaStream whose underlying stream is a SourceMediaStream.
*/
static already_AddRefed<DOMLocalMediaStream>
CreateSourceStream(nsIDOMWindow* aWindow,
MediaStreamGraph* aGraph);
/**
* Create an nsDOMLocalMediaStream whose underlying stream is a TrackUnionStream.
*/
static already_AddRefed<DOMLocalMediaStream>
CreateTrackUnionStream(nsIDOMWindow* aWindow,
MediaStreamGraph* aGraph);
/**
* Create an nsDOMLocalMediaStream whose underlying stream is an
* AudioCaptureStream. */
static already_AddRefed<DOMLocalMediaStream> CreateAudioCaptureStream(
nsIDOMWindow* aWindow, MediaStreamGraph* aGraph);
protected:
virtual ~DOMLocalMediaStream();
void StopImpl();
};
NS_DEFINE_STATIC_IID_ACCESSOR(DOMLocalMediaStream,
NS_DOMLOCALMEDIASTREAM_IID)
class DOMAudioNodeMediaStream : public DOMMediaStream
{
typedef dom::AudioNode AudioNode;
public:
explicit DOMAudioNodeMediaStream(AudioNode* aNode);
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(DOMAudioNodeMediaStream, DOMMediaStream)
/**
* Create a DOMAudioNodeMediaStream whose underlying stream is a TrackUnionStream.
*/
static already_AddRefed<DOMAudioNodeMediaStream>
CreateTrackUnionStream(nsIDOMWindow* aWindow,
AudioNode* aNode,
MediaStreamGraph* aGraph);
protected:
~DOMAudioNodeMediaStream();
private:
// If this object wraps a stream owned by an AudioNode, we need to ensure that
// the node isn't cycle-collected too early.
RefPtr<AudioNode> mStreamNode;
};
class DOMHwMediaStream : public DOMLocalMediaStream
{
typedef mozilla::gfx::IntSize IntSize;
typedef layers::ImageContainer ImageContainer;
#ifdef MOZ_WIDGET_GONK
typedef layers::OverlayImage OverlayImage;
typedef layers::OverlayImage::Data Data;
#endif
public:
DOMHwMediaStream();
static already_AddRefed<DOMHwMediaStream> CreateHwStream(nsIDOMWindow* aWindow);
virtual DOMHwMediaStream* AsDOMHwMediaStream() override { return this; }
int32_t RequestOverlayId();
void SetOverlayId(int32_t aOverlayId);
void SetImageSize(uint32_t width, uint32_t height);
protected:
~DOMHwMediaStream();
private:
void Init(MediaStream* aStream);
#ifdef MOZ_WIDGET_GONK
RefPtr<ImageContainer> mImageContainer;
const int DEFAULT_IMAGE_ID = 0x01;
const int DEFAULT_IMAGE_WIDTH = 400;
const int DEFAULT_IMAGE_HEIGHT = 300;
RefPtr<OverlayImage> mOverlayImage;
Data mImageData;
#endif
};
} // namespace mozilla
#endif /* NSDOMMEDIASTREAM_H_ */
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