Add new codec for FlexFEC.

webrtc/sdk/objc/Framework/Classes/RTCRtpCodecParameters.mm

 /*
  *  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 "RTCRtpCodecParameters+Private.h"
 
 #import "NSString+StdString.h"
 
 #include "webrtc/media/base/mediaconstants.h"
 
 const NSString * const kRTCRtxCodecMimeType = @(cricket::kRtxCodecName);
 const NSString * const kRTCRedCodecMimeType = @(cricket::kRedCodecName);
 const NSString * const kRTCUlpfecCodecMimeType = @(cricket::kUlpfecCodecName);
+const NSString * const kRTCFlexfecCodecMimeType = @(cricket::kFlexfecCodecName);
 const NSString * const kRTCOpusCodecMimeType = @(cricket::kOpusCodecName);
 const NSString * const kRTCIsacCodecMimeType = @(cricket::kIsacCodecName);
 const NSString * const kRTCL16CodecMimeType  = @(cricket::kL16CodecName);
 const NSString * const kRTCG722CodecMimeType = @(cricket::kG722CodecName);
 const NSString * const kRTCIlbcCodecMimeType = @(cricket::kIlbcCodecName);
 const NSString * const kRTCPcmuCodecMimeType = @(cricket::kPcmuCodecName);
 const NSString * const kRTCPcmaCodecMimeType = @(cricket::kPcmaCodecName);
 const NSString * const kRTCDtmfCodecMimeType = @(cricket::kDtmfCodecName);
 const NSString * const kRTCComfortNoiseCodecMimeType =
     @(cricket::kComfortNoiseCodecName);
@@ skipping 26 matching lines @@
 - (webrtc::RtpCodecParameters)nativeParameters {
   webrtc::RtpCodecParameters parameters;
   parameters.payload_type = _payloadType;
   parameters.mime_type = [NSString stdStringForString:_mimeType];
   parameters.clock_rate = _clockRate;
   parameters.channels = _channels;
   return parameters;
 }
 
 @end