gecko/dom/media/MediaStreamTrack.cpp
Andreas Pehrson 9fb5ec93b1 Bug 1170958 - Refactor DOMMediaStream to contain a 3-stage track chain. r=roc
This lets us separate tracks by ownership like so:
* Input    - Owned by the producer of the DOMMediaStream (gUM etc.)
* Owned    - Contains Input tracks (per above) or tracks cloned tracks
             if this DOMMediaStream is a clone.
* Playback - Contains Owned tracks plus tracks addTrack()ed to this
             DOMMediaStream minus tracks removeTrack()ed from this
             DOMMediaStream.
2015-09-30 09:31:54 +08:00

74 lines
1.9 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/. */
#include "MediaStreamTrack.h"
#include "DOMMediaStream.h"
#include "nsIUUIDGenerator.h"
#include "nsServiceManagerUtils.h"
namespace mozilla {
namespace dom {
MediaStreamTrack::MediaStreamTrack(DOMMediaStream* aStream, TrackID aTrackID)
: mOwningStream(aStream), mTrackID(aTrackID), mEnded(false), mEnabled(true)
{
nsresult rv;
nsCOMPtr<nsIUUIDGenerator> uuidgen =
do_GetService("@mozilla.org/uuid-generator;1", &rv);
nsID uuid;
memset(&uuid, 0, sizeof(uuid));
if (uuidgen) {
uuidgen->GenerateUUIDInPlace(&uuid);
}
char chars[NSID_LENGTH];
uuid.ToProvidedString(chars);
mID = NS_ConvertASCIItoUTF16(chars);
}
MediaStreamTrack::~MediaStreamTrack()
{
}
NS_IMPL_CYCLE_COLLECTION_INHERITED(MediaStreamTrack, DOMEventTargetHelper,
mOwningStream)
NS_IMPL_ADDREF_INHERITED(MediaStreamTrack, DOMEventTargetHelper)
NS_IMPL_RELEASE_INHERITED(MediaStreamTrack, DOMEventTargetHelper)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(MediaStreamTrack)
NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
void
MediaStreamTrack::GetId(nsAString& aID) const
{
aID = mID;
}
void
MediaStreamTrack::SetEnabled(bool aEnabled)
{
mEnabled = aEnabled;
mOwningStream->SetTrackEnabled(mTrackID, aEnabled);
}
void
MediaStreamTrack::Stop()
{
mOwningStream->StopTrack(mTrackID);
}
already_AddRefed<Promise>
MediaStreamTrack::ApplyConstraints(const MediaTrackConstraints& aConstraints,
ErrorResult &aRv)
{
return GetStream()->ApplyConstraintsToTrack(mTrackID, aConstraints, aRv);
}
} // namespace dom
} // namespace mozilla