RtpRtcp allows to register header extension by name

webrtc/modules/rtp_rtcp/include/rtp_rtcp.h

 /*
  *  Copyright (c) 2012 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.
  */
 
 #ifndef WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_RTCP_H_
 #define WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_RTCP_H_
 
 #include <set>
+#include <string>
 #include <utility>
 #include <vector>
 
 #include "webrtc/modules/include/module.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 
 namespace webrtc {
 // Forward declarations.
 class ReceiveStatistics;
 class RemoteBitrateEstimator;
@@ skipping 150 matching lines @@
     virtual int32_t DeRegisterSendPayload(int8_t payloadType) = 0;
 
    /*
     *   (De)register RTP header extension type and id.
     *
     *   return -1 on failure else 0
     */
     virtual int32_t RegisterSendRtpHeaderExtension(RTPExtensionType type,
                                                    uint8_t id) = 0;
 
+    virtual bool RegisterRtpHeaderExtension(const std::string& type,
+                                            uint8_t id) = 0;
+
     virtual int32_t DeregisterSendRtpHeaderExtension(RTPExtensionType type) = 0;
 
     /*
     *   get start timestamp
     */
     virtual uint32_t StartTimestamp() const = 0;
 
     /*
     *   configure start timestamp, default is a random number
     *
@@ skipping 450 matching lines @@
 
     /*
     *   send a request for a keyframe
     *
     *   return -1 on failure else 0
     */
     virtual int32_t RequestKeyFrame() = 0;
 };
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_RTCP_H_