Add statistics gathering for packet loss.

webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h

 /*
  *  Copyright (c) 2012 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 336 matching lines @@
 class NullRtpAudioFeedback : public RtpAudioFeedback {
  public:
   virtual ~NullRtpAudioFeedback() {}
 
   void OnPlayTelephoneEvent(const int32_t id,
                             const uint8_t event,
                             const uint16_t lengthMs,
                             const uint8_t volume) override {}
 };
 
+struct RtpPacketLossStats {

[noahric, 2015/06/26 00:21:19]

Comment for this struct and each field.

[bcornell, 2015/06/30 19:47:45]

Done.

+  uint64_t single_packet_loss_count;
+  uint64_t multiple_packet_loss_event_count;
+  uint64_t multiple_packet_loss_packet_count;
+};
+
 }  // namespace webrtc
 #endif // WEBRTC_MODULES_RTP_RTCP_INTERFACE_RTP_RTCP_DEFINES_H_