Adding getParameters/setParameters APIs to RtpReceiver.

webrtc/api/rtpparameters.h

 /*
  *  Copyright 2015 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.
  */
 
 #ifndef WEBRTC_API_RTPPARAMETERS_H_
 #define WEBRTC_API_RTPPARAMETERS_H_
 
 #include <string>
 #include <vector>
 
 namespace webrtc {
 
 // These structures are defined as part of the RtpSender interface.
 // See http://w3c.github.io/webrtc-pc/#rtcrtpsender-interface for details.
 struct RtpEncodingParameters {
   bool active = true;
   int max_bitrate_bps = -1;
 
   bool operator==(const RtpEncodingParameters& o) const {
     return active == o.active && max_bitrate_bps == o.max_bitrate_bps;
   }
+  bool operator!=(const RtpEncodingParameters& o) const {
+    return !(*this == o);
+  }
 };
 
 struct RtpCodecParameters {
   int payload_type;
   std::string mime_type;
   int clock_rate;
   int channels = 1;
   // TODO(deadbeef): Add sdpFmtpLine field.
 
   bool operator==(const RtpCodecParameters& o) const {
     return payload_type == o.payload_type && mime_type == o.mime_type &&
            clock_rate == o.clock_rate && channels == o.channels;
   }
+  bool operator!=(const RtpCodecParameters& o) const { return !(*this == o); }
 };
 
 struct RtpParameters {
   std::vector<RtpEncodingParameters> encodings;
   std::vector<RtpCodecParameters> codecs;
 
   bool operator==(const RtpParameters& o) const {
     return encodings == o.encodings && codecs == o.codecs;
   }
+  bool operator!=(const RtpParameters& o) const { return !(*this == o); }
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_API_RTPPARAMETERS_H_