Added support for logging the SSRC corresponding to AudioPlayout events.

webrtc/video/rtc_event_log.h

 /*
  *  Copyright (c) 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.
  */
 
@@ skipping 13 matching lines @@
 namespace rtclog {
 class EventStream;
 }  // namespace rtclog
 
 class RtcEventLogImpl;
 
 enum class MediaType;
 
 class RtcEventLog {
  public:
-  // The types of debug events that are currently supported for logging.
-  enum class DebugEvent { kLogStart, kLogEnd, kAudioPlayout };
-
   virtual ~RtcEventLog() {}
 
   static rtc::scoped_ptr<RtcEventLog> Create();
 
   // Starts logging for the specified duration to the specified file.
   // The logging will stop automatically after the specified duration.
   // If the file already exists it will be overwritten.
   // If the file cannot be opened, the RtcEventLog will not start logging.
   virtual void StartLogging(const std::string& file_name, int duration_ms) = 0;
 
@@ skipping 13 matching lines @@
                             MediaType media_type,
                             const uint8_t* header,
                             size_t packet_length) = 0;
 
   // Logs an incoming or outgoing RTCP packet.
   virtual void LogRtcpPacket(bool incoming,
                              MediaType media_type,
                              const uint8_t* packet,
                              size_t length) = 0;
 
-  // Logs a debug event.
-  virtual void LogDebugEvent(DebugEvent event_type) = 0;
+  // Log an audio playout event

[hlundin-webrtc, 2015/09/15 12:30:52]

Nit: Logs...

[ivoc, 2015/09/15 14:55:16]

Done.

+  virtual void LogAudioPlayout(uint32_t ssrc) = 0;

[terelius, 2015/09/15 14:32:29]

Since there is no more DebugEvent in the C-interface, I think we should remove
the DebugEvent message from the protobuf too. Not sure if that is best done in
this or a separate CL.

[ivoc, 2015/09/15 14:55:16]

I agree, let's do that in a follow-up CL.

 
   // Reads an RtcEventLog file and returns true when reading was successful.
   // The result is stored in the given EventStream object.
   static bool ParseRtcEventLog(const std::string& file_name,
                                rtclog::EventStream* result);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_RTC_EVENT_LOG_H_