Set actual transport overhead in rtp_rtcp

webrtc/pc/srtpfilter.h

Index: webrtc/pc/srtpfilter.h
diff --git a/webrtc/pc/srtpfilter.h b/webrtc/pc/srtpfilter.h
index ec91805e30d8c38ccf1faab53727b330ecb98ab6..06edddf80d97a4e6d1a8274c4710cb94c11fc4a6 100644
--- a/webrtc/pc/srtpfilter.h
+++ b/webrtc/pc/srtpfilter.h
@@ -111,6 +111,9 @@ class SrtpFilter {
   // Returns rtp auth params from srtp context.
   bool GetRtpAuthParams(uint8_t** key, int* key_len, int* tag_len);
 
+  // Returns srtp overhead for rtp packets.
+  bool GetSrtpOverhead(int* srtp_overhead) const;
+
   // Update the silent threshold (in ms) for signaling errors.
   void set_signal_silent_time(int signal_silent_time_in_ms);
 
@@ -201,6 +204,8 @@ class SrtpSession {
   // Helper method to get authentication params.
   bool GetRtpAuthParams(uint8_t** key, int* key_len, int* tag_len);
 
+  int GetSrtpOverhead() const;
+
   // Update the silent threshold (in ms) for signaling errors.
   void set_signal_silent_time(int signal_silent_time_in_ms);