Add option to print information about configured SSRCs from RTC event logs.

webrtc/logging/rtc_event_log/rtc_event_log2text.cc

Index: webrtc/logging/rtc_event_log/rtc_event_log2text.cc
diff --git a/webrtc/logging/rtc_event_log/rtc_event_log2text.cc b/webrtc/logging/rtc_event_log/rtc_event_log2text.cc
index 32d5ae5f7a4dfa1827ae70f96b6d9dbbf9943710..944746a14fd3c035c5a2c17180dc559c9b0173f1 100644
--- a/webrtc/logging/rtc_event_log/rtc_event_log2text.cc
+++ b/webrtc/logging/rtc_event_log/rtc_event_log2text.cc
@@ -37,6 +37,7 @@
 
 namespace {
 
+DEFINE_bool(noconfig, true, "Excludes stream configurations.");
 DEFINE_bool(noincoming, false, "Excludes incoming packets.");
 DEFINE_bool(nooutgoing, false, "Excludes outgoing packets.");
 // TODO(terelius): Note that the media type doesn't work with outgoing packets.
@@ -349,6 +350,46 @@ int main(int argc, char* argv[]) {
   }
 
   for (size_t i = 0; i < parsed_stream.GetNumberOfEvents(); i++) {
+    if (!FLAGS_noconfig && !FLAGS_novideo && !FLAGS_noincoming &&
+        parsed_stream.GetEventType(i) ==
+            webrtc::ParsedRtcEventLog::VIDEO_RECEIVER_CONFIG_EVENT) {
+      webrtc::VideoReceiveStream::Config config(nullptr);
+      parsed_stream.GetVideoReceiveConfig(i, &config);
+      std::cout << parsed_stream.GetTimestamp(i) << "\tVIDEO_RECV_CONFIG"
+                << "\tSSRC=" << config.rtp.remote_ssrc

[danilchap, 2017/02/08 14:30:50]

may be label them remote/local rather than ssrc/rtcp ssrc

[terelius, 2017/02/08 14:41:05]

Do you find local/remote to be more clear? The local ssrc is only used for RTCP,
right?

[danilchap, 2017/02/08 14:44:44]

Is it? as I understand
rtp sender care about local ssrc only
rtp receiver care about remote ssrc only
rtcp (both sender and receiver) use both.

[terelius, 2017/02/08 14:49:11]

I agree, but since this is a receive stream there should not be any RTP sender,
right? So that only leaves RTCP using local ssrc.

[danilchap, 2017/02/08 15:41:45]

Right,
I'm still not sure about 'rtcp' label - it is id of the receiver endpoint, but
just happen to appear in rtcp messages only.
How about label 'Feedback ssrc'?

[terelius, 2017/02/08 15:55:42]

I'm fine with any label. Do you prefer "ssrc"/"feedback_ssrc" over
"local_ssrc"/"remote_ssrc"?

[danilchap, 2017/02/08 16:00:41]

Yes, I think ssrc/feedback_ssrc is better.

+                << "\tRTCP_SSRC=" << config.rtp.local_ssrc << std::endl;
+    }
+    if (!FLAGS_noconfig && !FLAGS_novideo && !FLAGS_nooutgoing &&
+        parsed_stream.GetEventType(i) ==
+            webrtc::ParsedRtcEventLog::VIDEO_SENDER_CONFIG_EVENT) {
+      webrtc::VideoSendStream::Config config(nullptr);
+      parsed_stream.GetVideoSendConfig(i, &config);
+      std::cout << parsed_stream.GetTimestamp(i) << "\tVIDEO_SEND_CONFIG";
+      std::cout << "\tSSRCs=";
+      for (const auto& ssrc : config.rtp.ssrcs)
+        std::cout << ssrc << ',';
+      std::cout << "\tRTX_SSRCs=";
+      for (const auto& ssrc : config.rtp.rtx.ssrcs)
+        std::cout << ssrc << ',';
+      std::cout << std::endl;
+    }
+    if (!FLAGS_noconfig && !FLAGS_noaudio && !FLAGS_noincoming &&
+        parsed_stream.GetEventType(i) ==
+            webrtc::ParsedRtcEventLog::AUDIO_RECEIVER_CONFIG_EVENT) {
+      webrtc::AudioReceiveStream::Config config;
+      parsed_stream.GetAudioReceiveConfig(i, &config);
+      std::cout << parsed_stream.GetTimestamp(i) << "\tAUDIO_RECV_CONFIG"
+                << "\tSSRC=" << config.rtp.remote_ssrc

[danilchap, 2017/02/08 14:30:50]

ditto

+                << "\tRTCP_SSRC=" << config.rtp.local_ssrc << std::endl;
+    }
+    if (!FLAGS_noconfig && !FLAGS_noaudio && !FLAGS_nooutgoing &&
+        parsed_stream.GetEventType(i) ==
+            webrtc::ParsedRtcEventLog::AUDIO_SENDER_CONFIG_EVENT) {
+      webrtc::AudioSendStream::Config config(nullptr);
+      parsed_stream.GetAudioSendConfig(i, &config);
+      std::cout << parsed_stream.GetTimestamp(i) << "\tAUDIO_SEND_CONFIG"
+                << "\tSSRC=" << config.rtp.ssrc << std::endl;
+    }
     if (!FLAGS_nortp &&
         parsed_stream.GetEventType(i) == webrtc::ParsedRtcEventLog::RTP_EVENT) {
       size_t header_length;