New method CreateScaledFrame in the VideoFrameFactory interface.

webrtc/media/engine/webrtcvideoframefactory.h

 /*
  *  Copyright (c) 2014 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_MEDIA_ENGINE_WEBRTCVIDEOFRAMEFACTORY_H_
 #define WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOFRAMEFACTORY_H_
 
 #include "webrtc/media/base/videoframefactory.h"
 
 namespace cricket {
 
 struct CapturedFrame;
 
 // Creates instances of cricket::WebRtcVideoFrame.
 class WebRtcVideoFrameFactory : public VideoFrameFactory {
  public:
+  std::unique_ptr<VideoFrame> CreateScaledCroppedFrame(
+      const CapturedFrame* input_frame,
+      int crop_x,
+      int crop_y,
+      int crop_width,
+      int crop_height,
+      int dst_width,
+      int dst_height) const override;
+
   VideoFrame* CreateAliasedFrame(const CapturedFrame* aliased_frame,

[perkj_webrtc, 2016/05/11 10:05:17]

Can you remove CreateAliasedFrame here an only use the new method?

[nisse-webrtc, 2016/05/12 12:23:06]

Not at the moment. Chrome's WebRtcVideoCapturerAdapter::MediaVideoFrameFactory
overrides it, both the 3-argument and 5-argument flavors.

                                  int width,
                                  int height) const override;
 };
 
 }  // namespace cricket
 
 #endif  // WEBRTC_MEDIA_ENGINE_WEBRTCVIDEOFRAMEFACTORY_H_