Add ability to scale to arbitrary factors

webrtc/media/base/adaptedvideotracksource.h

Index: webrtc/media/base/adaptedvideotracksource.h
diff --git a/webrtc/media/base/adaptedvideotracksource.h b/webrtc/media/base/adaptedvideotracksource.h
index 5b420aeb9e1d344bc9e20667b85a12eaea7052b4..5ea6c4a87f5d234e86239caa71a0f008065ea881 100644
--- a/webrtc/media/base/adaptedvideotracksource.h
+++ b/webrtc/media/base/adaptedvideotracksource.h
@@ -53,7 +53,7 @@ class AdaptedVideoTrackSource
   // 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.