Add ability to scale to arbitrary factors

webrtc/media/base/adaptedvideotracksource.h

 /*
  *  Copyright (c) 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.
  */
 
@@ skipping 35 matching lines @@
                   int* crop_x,
                   int* crop_y);
 
   // Returns the current value of the apply_rotation flag, derived
   // from the VideoSinkWants of registered sinks. The value is derived
   // from sinks' wants, in AddOrUpdateSink and RemoveSink. Beware that
   // when using this method from a different thread, the value may
   // become stale before it is used.
   bool apply_rotation();
 
-  cricket::VideoAdapter* video_adapter() { return &video_adapter_; }
+  virtual cricket::VideoAdapter* video_adapter() { return &video_adapter_; }

[magjed_webrtc, 2016/12/07 13:44:51]

Don't make this virtual. Make a protected AdaptedVideoTrackSource ctor that
takes the alignment for video_adapter_ as an argument instead.

[kthelgason, 2016/12/08 08:42:03]

Done.

 
  private:
   // Implements rtc::VideoSourceInterface.
   void AddOrUpdateSink(rtc::VideoSinkInterface<webrtc::VideoFrame>* sink,
                        const rtc::VideoSinkWants& wants) override;
   void RemoveSink(rtc::VideoSinkInterface<webrtc::VideoFrame>* sink) override;
 
   // Part of VideoTrackSourceInterface.
   bool GetStats(Stats* stats) override;
 
   void OnSinkWantsChanged(const rtc::VideoSinkWants& wants);
 
   rtc::ThreadChecker thread_checker_;
 
   cricket::VideoAdapter video_adapter_;
 
   rtc::CriticalSection stats_crit_;
   rtc::Optional<Stats> stats_ GUARDED_BY(stats_crit_);
 
   VideoBroadcaster broadcaster_;
 };
 
 }  // namespace rtc
 
 #endif  // WEBRTC_MEDIA_BASE_ADAPTEDVIDEOTRACKSOURCE_H_