Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/api/videotrack.cc

-/*
- *  Copyright 2011 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#include "webrtc/api/videotrack.h"
-
-#include <string>
-
-namespace webrtc {
-
-const char MediaStreamTrackInterface::kVideoKind[] = "video";
-
-VideoTrack::VideoTrack(const std::string& label,
-                       VideoTrackSourceInterface* video_source)
-    : MediaStreamTrack<VideoTrackInterface>(label),
-      video_source_(video_source) {
-  worker_thread_checker_.DetachFromThread();
-  video_source_->RegisterObserver(this);
-}
-
-VideoTrack::~VideoTrack() {
-  video_source_->UnregisterObserver(this);
-}
-
-std::string VideoTrack::kind() const {
-  return kVideoKind;
-}
-
-// AddOrUpdateSink and RemoveSink should be called on the worker
-// thread.
-void VideoTrack::AddOrUpdateSink(rtc::VideoSinkInterface<VideoFrame>* sink,
-                                 const rtc::VideoSinkWants& wants) {
-  RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
-  VideoSourceBase::AddOrUpdateSink(sink, wants);
-  rtc::VideoSinkWants modified_wants = wants;
-  modified_wants.black_frames = !enabled();
-  video_source_->AddOrUpdateSink(sink, modified_wants);
-}
-
-void VideoTrack::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
-  RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
-  VideoSourceBase::RemoveSink(sink);
-  video_source_->RemoveSink(sink);
-}
-
-bool VideoTrack::set_enabled(bool enable) {
-  RTC_DCHECK(signaling_thread_checker_.CalledOnValidThread());
-  for (auto& sink_pair : sink_pairs()) {
-    rtc::VideoSinkWants modified_wants = sink_pair.wants;
-    modified_wants.black_frames = !enable;
-    // video_source_ is a proxy object, marshalling the call to the
-    // worker thread.
-    video_source_->AddOrUpdateSink(sink_pair.sink, modified_wants);
-  }
-  return MediaStreamTrack<VideoTrackInterface>::set_enabled(enable);
-}
-
-void VideoTrack::OnChanged() {
-  RTC_DCHECK(signaling_thread_checker_.CalledOnValidThread());
-  if (video_source_->state() == MediaSourceInterface::kEnded) {
-    set_state(kEnded);
-  } else {
-    set_state(kLive);
-  }
-}
-
-rtc::scoped_refptr<VideoTrack> VideoTrack::Create(
-    const std::string& id,
-    VideoTrackSourceInterface* source) {
-  rtc::RefCountedObject<VideoTrack>* track =
-      new rtc::RefCountedObject<VideoTrack>(id, source);
-  return track;
-}
-
-}  // namespace webrtc