ObjC: Fix quality scaling for injected encoders

webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h

Index: webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h
diff --git a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h
index 95b519fdc04fa07a075c4acecc297a62706daa7b..a57e3e1077fdf9b7c08438048d06a779c8cd0a9f 100644
--- a/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h
+++ b/webrtc/sdk/objc/Framework/Headers/WebRTC/RTCVideoCodec.h
@@ -104,6 +104,17 @@ RTC_EXPORT
 
 @end
 
+/** QP thresholds for encoder. Corresponds to webrtc::VideoEncoder::QpThresholds. */
+RTC_EXPORT
+@interface RTCVideoEncoderQpThresholds : NSObject
+
+- (instancetype)initWithThresholdsLow:(NSInteger)low high:(NSInteger)high;
+
+@property(nonatomic, readonly) NSInteger low;
+@property(nonatomic, readonly) NSInteger high;
+
+@end
+
 /** Protocol for encoder implementations. */
 RTC_EXPORT
 @protocol RTCVideoEncoder <NSObject>
@@ -118,6 +129,13 @@ RTC_EXPORT
            frameTypes:(NSArray<NSNumber *> *)frameTypes;
 - (BOOL)setBitrate:(uint32_t)bitrateKbit framerate:(uint32_t)framerate;
 
+/** Returns QP scaling settings for encoder. The quality scaler adjusts the resolution in order to
+ *  keep the QP from the encoded images within the given range. Returning nil from this function
+ *  disables quality scaling. */
+- (RTCVideoEncoderQpThresholds *)scalingSettings;
+
+// TODO(andersc): Add implementationName method.

[andersc, 2017/08/01 14:30:26]

Is this related? I suppose it's a oneliner just returning a string (to
differentiate between implementations of the same codec?)?

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

It's not really related but it's another function that we haven't wrapped, I
just wanted to add a TODO so we don't forget about it. It should be easy to
implement, yes.

+
 @end
 
 /** Protocol for decoder implementations. */
@@ -135,6 +153,8 @@ RTC_EXPORT
       codecSpecificInfo:(__nullable id<RTCCodecSpecificInfo>)info
            renderTimeMs:(int64_t)renderTimeMs;
 
+// TODO(andersc): Add implementationName method.
+
 @end
 
 NS_ASSUME_NONNULL_END