/* 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 "VideoStreamTrack.h"
#include "MediaTrackGraph.h"
#include "MediaTrackListener.h"
#include "VideoOutput.h"
#include "nsContentUtils.h"
#include "nsGlobalWindowInner.h"
namespace mozilla::dom {
VideoStreamTrack::VideoStreamTrack(nsPIDOMWindowInner* aWindow,
mozilla::MediaTrack* aInputTrack,
MediaStreamTrackSource* aSource,
MediaStreamTrackState aReadyState,
bool aMuted,
const MediaTrackConstraints& aConstraints)
: MediaStreamTrack(aWindow, aInputTrack, aSource, aReadyState, aMuted,
aConstraints) {}
void VideoStreamTrack::Destroy() {
mVideoOutputs.Clear();
MediaStreamTrack::Destroy();
}
void VideoStreamTrack::AddVideoOutput(VideoOutput* aOutput) {
if (Ended()) {
return;
}
MOZ_ASSERT(aOutput->mAttachment == VideoOutput::State::Detached);
const bool exists = mVideoOutputs.Contains(aOutput);
if (exists) {
// A VideoOutput can be detached either through RemoveVideoOutput or by the
// graph removing it during (forced) shutdown. In the latter case it will
// still exist in mVideoOutputs in the detached state.
// Allow re-attaching a detached VideoOutput as users may listen to and use
// mAttachment to determine whether or not to re-try AddVideoOutput().
if (aOutput->mAttachment == VideoOutput::State::Attached) {
MOZ_ASSERT_UNREACHABLE(
"A VideoOutput was already added");
return;
}
}
else {
mVideoOutputs.AppendElement(aOutput);
}
aOutput->mAttachment = VideoOutput::State::Attached;
AddDirectListener(aOutput);
AddListener(aOutput);
}
void VideoStreamTrack::RemoveVideoOutput(VideoOutput* aOutput) {
for (
const auto& output : mVideoOutputs.Clone()) {
if (output == aOutput) {
mVideoOutputs.RemoveElement(aOutput);
// Don't mark the output detaching if it was already detached through
// forced graph shutdown.
if (aOutput->mAttachment == VideoOutput::State::Attached) {
aOutput->mAttachment = VideoOutput::State::Detaching;
RemoveDirectListener(aOutput);
RemoveListener(aOutput);
}
}
}
}
void VideoStreamTrack::GetLabel(nsAString& aLabel, CallerType aCallerType) {
MediaStreamTrack::GetLabel(aLabel, aCallerType);
}
already_AddRefed<MediaStreamTrack> VideoStreamTrack::Clone() {
return MediaStreamTrack::CloneInternal<VideoStreamTrack>();
}
}
// namespace mozilla::dom