Adding C++ versions of currently spec'd "RtpParameters" structs.

webrtc/pc/rtcstatscollector.cc

 /*
  *  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.
  */
 
@@ skipping 152 matching lines @@
   RTC_DCHECK_GE(audio_level, 0);
   RTC_DCHECK_LE(audio_level, 32767);
   return audio_level / 32767.0;
 }
 
 std::unique_ptr<RTCCodecStats> CodecStatsFromRtpCodecParameters(
     uint64_t timestamp_us, bool inbound, bool audio,
     const RtpCodecParameters& codec_params) {
   RTC_DCHECK_GE(codec_params.payload_type, 0);
   RTC_DCHECK_LE(codec_params.payload_type, 127);
+  RTC_DCHECK(codec_params.clock_rate);
   uint32_t payload_type = static_cast<uint32_t>(codec_params.payload_type);
   std::unique_ptr<RTCCodecStats> codec_stats(new RTCCodecStats(
       RTCCodecStatsIDFromDirectionMediaAndPayload(inbound, audio, payload_type),
       timestamp_us));
   codec_stats->payload_type = payload_type;
-  codec_stats->codec = (audio ? "audio/" : "video/") + codec_params.mime_type;
-  codec_stats->clock_rate = static_cast<uint32_t>(codec_params.clock_rate);
+  codec_stats->codec = codec_params.mime_type();
+  if (codec_params.clock_rate) {
+    codec_stats->clock_rate = static_cast<uint32_t>(*codec_params.clock_rate);
+  }
   return codec_stats;
 }
 
 void SetMediaStreamTrackStatsFromMediaStreamTrackInterface(
     const MediaStreamTrackInterface& track,
     RTCMediaStreamTrackStats* track_stats) {
   track_stats->track_identifier = track.id();
   track_stats->ended = (track.state() == MediaStreamTrackInterface::kEnded);
 }
 
@@ skipping 1032 matching lines @@
     const std::string& type) {
   return CandidateTypeToRTCIceCandidateType(type);
 }
 
 const char* DataStateToRTCDataChannelStateForTesting(
     DataChannelInterface::DataState state) {
   return DataStateToRTCDataChannelState(state);
 }
 
 }  // namespace webrtc