ObjC: Fix quality scaling for injected encoders

webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_encoder_factory.mm

Index: webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_encoder_factory.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_encoder_factory.mm b/webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_encoder_factory.mm
index c464dabd79bb72e8832bc9913d0976941bddea46..0472fc07ae2a8939430801efe0a5ba8beee1af01 100644
--- a/webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_encoder_factory.mm
+++ b/webrtc/sdk/objc/Framework/Classes/VideoToolbox/objc_video_encoder_factory.mm
@@ -111,6 +111,13 @@ class ObjCVideoEncoder : public VideoEncoder {
 
   bool SupportsNativeHandle() const { return true; }
 
+  VideoEncoder::ScalingSettings GetScalingSettings() const {
+    RTCVideoEncoderQpThresholds* qp_thresholds = [encoder_ scalingSettings];
+    return qp_thresholds ?
+        ScalingSettings(true /* enabled */, qp_thresholds.low, qp_thresholds.high) :
+        ScalingSettings(false /* enabled */);

[daniela-webrtc, 2017/08/01 13:09:48]

I guess this means /* disabled */ ?

[magjed_webrtc, 2017/08/01 15:04:55]

The comment represents the argument name, so it represents enabled==false, i.e.
disabled.

+  }
+
  private:
   id<RTCVideoEncoder> encoder_;
 };