Wire up currently-received video codec to stats.

talk/media/webrtc/webrtcvideoengine2.cc

 /*
  * libjingle
  * Copyright 2014 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 2599 matching lines @@
   }
 
   info.decode_ms = stats.decode_ms;
   info.max_decode_ms = stats.max_decode_ms;
   info.current_delay_ms = stats.current_delay_ms;
   info.target_delay_ms = stats.target_delay_ms;
   info.jitter_buffer_ms = stats.jitter_buffer_ms;
   info.min_playout_delay_ms = stats.min_playout_delay_ms;
   info.render_delay_ms = stats.render_delay_ms;
 
+  // Find what codec we're currently receiving.
+  for (const webrtc::VideoReceiveStream::Decoder& decoder : config_.decoders) {
+    if (decoder.payload_type == stats.current_payload_type) {
+      info.codec_name = decoder.payload_name;
+      break;
+    }
+  }

[pthatcher1, 2015/08/27 16:50:50]

Would be easier to read with a helper method, something like
GetReceiveCodecNameFromPayloadType.

[pbos-webrtc, 2015/08/28 10:41:19]

Done.

+
   info.firs_sent = stats.rtcp_packet_type_counts.fir_packets;
   info.plis_sent = stats.rtcp_packet_type_counts.pli_packets;
   info.nacks_sent = stats.rtcp_packet_type_counts.nack_packets;
 
   return info;
 }
 
 WebRtcVideoChannel2::VideoCodecSettings::VideoCodecSettings()
     : rtx_payload_type(-1) {}
 
@@ skipping 102 matching lines @@
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VIDEO