Add sender controlled playout delay limits

webrtc/config.h

 /*
  *  Copyright (c) 2013 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 69 matching lines @@
   // details:
   // http://www.etsi.org/deliver/etsi_ts/126100_126199/126114/12.07.00_60/ts_126114v120700p.pdf
   static const char* kVideoRotationUri;
   static const int kVideoRotationDefaultId;
 
   // Header extension for transport sequence number, see url for details:
   // http://www.ietf.org/id/draft-holmer-rmcat-transport-wide-cc-extensions
   static const char* kTransportSequenceNumberUri;
   static const int kTransportSequenceNumberDefaultId;
 
+  static const char* kPlayoutDelayUri;
+  static const int kPlayoutDelayDefaultId;
+
   std::string uri;
   int id;
 };
 
 struct VideoStream {
   VideoStream();
   ~VideoStream();
   std::string ToString() const;
 
   size_t width;
@@ skipping 66 matching lines @@
 struct VoicePacing {
   VoicePacing() : enabled(false) {}
   explicit VoicePacing(bool value) : enabled(value) {}
   static const ConfigOptionID identifier = ConfigOptionID::kVoicePacing;
   bool enabled;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_CONFIG_H_