Adding codecs to the RtpParameters returned by an RtpSender.

webrtc/api/objc/RTCRtpParameters.h

 /*
  *  Copyright 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.
  */
 
 #import <Foundation/Foundation.h>
 
+#import "webrtc/api/objc/RTCRtpCodecParameters.h"
 #import "webrtc/api/objc/RTCRtpEncodingParameters.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
 @interface RTCRtpParameters : NSObject
 
 /** The currently active encodings in the order of preference. */
 @property(nonatomic, copy) NSArray<RTCRtpEncodingParameters *> *encodings;
 
+/** The negotiated set of send codecs in order of preference. */
+@property(nonatomic, copy) NSArray<RTCRtpCodecParameters *> *codecs;
+
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 
 @end
 
 NS_ASSUME_NONNULL_END