Create //webrtc/api:libjingle_peerconnection_api + refactorings.

webrtc/api/videocapturertracksource.h

-/*
- *  Copyright 2012 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.
- */
-
-#ifndef WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
-#define WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_
-
-#include <memory>
-
-#include "webrtc/api/mediastreaminterface.h"
-#include "webrtc/api/videotracksource.h"
-#include "webrtc/base/asyncinvoker.h"
-#include "webrtc/base/sigslot.h"
-#include "webrtc/media/base/videocapturer.h"
-#include "webrtc/media/base/videocommon.h"
-
-// VideoCapturerTrackSource implements VideoTrackSourceInterface. It owns a
-// cricket::VideoCapturer and make sure the camera is started at a resolution
-// that honors the constraints.
-// The state is set depending on the result of starting the capturer.
-// If the constraint can't be met or the capturer fails to start, the state
-// transition to kEnded, otherwise it transitions to kLive.
-namespace webrtc {
-
-class MediaConstraintsInterface;
-
-class VideoCapturerTrackSource : public VideoTrackSource,
-                                 public sigslot::has_slots<> {
- public:
-  // Creates an instance of VideoCapturerTrackSource.
-  // VideoCapturerTrackSource take ownership of |capturer|.
-  // |constraints| can be NULL and in that case the camera is opened using a
-  // default resolution.
-  static rtc::scoped_refptr<VideoTrackSourceInterface> Create(
-      rtc::Thread* worker_thread,
-      cricket::VideoCapturer* capturer,
-      const webrtc::MediaConstraintsInterface* constraints,
-      bool remote);
-
-  static rtc::scoped_refptr<VideoTrackSourceInterface> Create(
-      rtc::Thread* worker_thread,
-      cricket::VideoCapturer* capturer,
-      bool remote);
-
-  bool is_screencast() const override {
-    return video_capturer_->IsScreencast();
-  }
-  rtc::Optional<bool> needs_denoising() const override {
-    return needs_denoising_;
-  }
-
-  bool GetStats(Stats* stats) override;
-
- protected:
-  VideoCapturerTrackSource(rtc::Thread* worker_thread,
-                           cricket::VideoCapturer* capturer,
-                           bool remote);
-  virtual ~VideoCapturerTrackSource();
-  void Initialize(const webrtc::MediaConstraintsInterface* constraints);
-
- private:
-  void Stop();
-
-  void OnStateChange(cricket::VideoCapturer* capturer,
-                     cricket::CaptureState capture_state);
-
-  rtc::Thread* signaling_thread_;
-  rtc::Thread* worker_thread_;
-  rtc::AsyncInvoker invoker_;
-  std::unique_ptr<cricket::VideoCapturer> video_capturer_;
-  bool started_;
-  cricket::VideoFormat format_;
-  rtc::Optional<bool> needs_denoising_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_API_VIDEOCAPTURERTRACKSOURCE_H_