Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/api/videotracksource.cc

-/*
- *  Copyright 2016 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/videotracksource.h"
-
-#include <string>
-
-namespace webrtc {
-
-VideoTrackSource::VideoTrackSource(
-    rtc::VideoSourceInterface<VideoFrame>* source,
-    bool remote)
-    : source_(source), state_(kInitializing), remote_(remote) {
-  worker_thread_checker_.DetachFromThread();
-}
-
-void VideoTrackSource::SetState(SourceState new_state) {
-  if (state_ != new_state) {
-    state_ = new_state;
-    FireOnChanged();
-  }
-}
-
-void VideoTrackSource::OnSourceDestroyed() {
-  source_ = nullptr;
-}
-
-void VideoTrackSource::AddOrUpdateSink(
-    rtc::VideoSinkInterface<VideoFrame>* sink,
-    const rtc::VideoSinkWants& wants) {
-  RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
-  if (!source_) {
-    return;
-  }
-  source_->AddOrUpdateSink(sink, wants);
-}
-
-void VideoTrackSource::RemoveSink(rtc::VideoSinkInterface<VideoFrame>* sink) {
-  RTC_DCHECK(worker_thread_checker_.CalledOnValidThread());
-  if (!source_) {
-    return;
-  }
-  source_->RemoveSink(sink);
-}
-
-}  //  namespace webrtc