Support encrypted RTP extensions (RFC 6904)

webrtc/config.h

Index: webrtc/config.h
diff --git a/webrtc/config.h b/webrtc/config.h
index f8c9e8b7971724835a4b62b47b038ed40a61a903..5be84a84bf363ecb13f76f43c736af17d2bcbc10 100644
--- a/webrtc/config.h
+++ b/webrtc/config.h
@@ -58,14 +58,17 @@ struct UlpfecConfig {
 
 // RTP header extension, see RFC 5285.
 struct RtpExtension {
-  RtpExtension() : id(0) {}
+  RtpExtension() {}
   RtpExtension(const std::string& uri, int id) : uri(uri), id(id) {}
+  RtpExtension(const std::string& uri, int id, bool encrypted) : uri(uri),
+      id(id), encrypted(encrypted) {}
   std::string ToString() const;
   bool operator==(const RtpExtension& rhs) const {
-    return uri == rhs.uri && id == rhs.id;
+    return uri == rhs.uri && id == rhs.id && encrypted == rhs.encrypted;
   }
   static bool IsSupportedForAudio(const std::string& uri);
   static bool IsSupportedForVideo(const std::string& uri);
+  static bool AllowEncrypt(const std::string& uri);

[Taylor Brandstetter, 2017/03/22 18:00:10]

Can you leave a comment describing this method?

[joachim, 2017/03/23 00:04:32]

Done.

 
   // Header extension for audio levels, as defined in:
   // http://tools.ietf.org/html/draft-ietf-avtext-client-to-mixer-audio-level-03
@@ -96,12 +99,17 @@ struct RtpExtension {
   static const char* kPlayoutDelayUri;
   static const int kPlayoutDelayDefaultId;
 
+  // Encryption of Header Extensions, see RFC 6904 for details:
+  // https://tools.ietf.org/html/rfc6904
+  static const char* kEncryptHeaderExtensionsUri;
+
   // Inclusive min and max IDs for one-byte header extensions, per RFC5285.
   static const int kMinId;
   static const int kMaxId;
 
   std::string uri;
-  int id;
+  int id = 0;
+  bool encrypted = false;

[Taylor Brandstetter, 2017/03/22 18:00:10]

nit: If this was just "encrypt" rather than "encrypted", it would match the
naming of the ORTC "RtpHeaderExtensionParameters", and the string "encrypt" in
the URI.

[joachim, 2017/03/23 00:04:32]

Done.

 };
 
 struct VideoStream {