Adding codecs to the RtpParameters returned by an RtpSender.

webrtc/api/objc/RTCRtpCodecParameters.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>
 
 NS_ASSUME_NONNULL_BEGIN
 
-@interface RTCRtpEncodingParameters : NSObject
+@interface RTCRtpCodecParameters : NSObject
 
-/** Controls whether the encoding is currently transmitted. */
-@property(nonatomic, assign) BOOL isActive;
+/** The RTP payload type. */
+@property(nonatomic, assign) int payloadType;
 
-/** The maximum bitrate to use for the encoding, or nil if there is no
- *  limit.
+/**
+ * The codec MIME type. Valid types are listed in:
+ * http://www.iana.org/assignments/rtp-parameters/rtp-parameters.xhtml#rtp-parameters-2
  */
-@property(nonatomic, copy, nullable) NSNumber *maxBitrateBps;
+@property(nonatomic, nonnull) NSString *mimeType;

[skvlad, 2016/04/14 01:03:56]

Since this is in a NS_ASSUME_NONNULL block, all properties are nonnull by
default. None of the other files explicitly list the nonnull attribute, so it'd
be better for consistency to remove it.

[Taylor Brandstetter, 2016/04/14 01:43:45]

Done.

+
+/** The codec clock rate expressed in Hertz. */
+@property(nonatomic, assign) int clockRate;
+
+/** The number of channels (mono=1, stereo=2). */
+@property(nonatomic, assign) int channels;
 
 - (instancetype)init NS_DESIGNATED_INITIALIZER;
 
 @end
 
 NS_ASSUME_NONNULL_END