Return a copy of the supported RTP header extensions instead of a reference.

talk/media/webrtc/webrtcvideoengine2.cc

 /*
  * libjingle
  * Copyright 2014 Google Inc.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  *  1. Redistributions of source code must retain the above copyright notice,
  *     this list of conditions and the following disclaimer.
  *  2. Redistributions in binary form must reproduce the above copyright notice,
@@ skipping 538 matching lines @@
     channel->SetRenderer(default_recv_ssrc_, default_renderer_);
   }
 }
 
 WebRtcVideoEngine2::WebRtcVideoEngine2()
     : initialized_(false),
       external_decoder_factory_(NULL),
       external_encoder_factory_(NULL) {
   LOG(LS_INFO) << "WebRtcVideoEngine2::WebRtcVideoEngine2()";
   video_codecs_ = GetSupportedCodecs();
-  rtp_header_extensions_.push_back(
-      RtpHeaderExtension(kRtpTimestampOffsetHeaderExtension,
-                         kRtpTimestampOffsetHeaderExtensionDefaultId));
-  rtp_header_extensions_.push_back(
-      RtpHeaderExtension(kRtpAbsoluteSenderTimeHeaderExtension,
-                         kRtpAbsoluteSenderTimeHeaderExtensionDefaultId));
-  rtp_header_extensions_.push_back(
-      RtpHeaderExtension(kRtpVideoRotationHeaderExtension,
-                         kRtpVideoRotationHeaderExtensionDefaultId));
-  if (webrtc::field_trial::FindFullName("WebRTC-SendSideBwe") == "Enabled") {
-    rtp_header_extensions_.push_back(RtpHeaderExtension(
-        kRtpTransportSequenceNumberHeaderExtension,
-        kRtpTransportSequenceNumberHeaderExtensionDefaultId));
-  }
 }
 
 WebRtcVideoEngine2::~WebRtcVideoEngine2() {
   LOG(LS_INFO) << "WebRtcVideoEngine2::~WebRtcVideoEngine2";
 }
 
 void WebRtcVideoEngine2::Init() {
   LOG(LS_INFO) << "WebRtcVideoEngine2::Init";
   initialized_ = true;
 }
@@ skipping 27 matching lines @@
   RTC_DCHECK(initialized_);
   LOG(LS_INFO) << "CreateChannel. Options: " << options.ToString();
   return new WebRtcVideoChannel2(call, options, video_codecs_,
       external_encoder_factory_, external_decoder_factory_);
 }
 
 const std::vector<VideoCodec>& WebRtcVideoEngine2::codecs() const {
   return video_codecs_;
 }
 
-const std::vector<RtpHeaderExtension>&
-WebRtcVideoEngine2::rtp_header_extensions() const {
-  return rtp_header_extensions_;
+std::vector<RtpHeaderExtension>
+WebRtcVideoEngine2::SupportedRtpHeaderExtensions() const {
+  std::vector<RtpHeaderExtension> rtp_header_extensions;
+  rtp_header_extensions.push_back(
+      RtpHeaderExtension(kRtpTimestampOffsetHeaderExtension,
+                         kRtpTimestampOffsetHeaderExtensionDefaultId));
+  rtp_header_extensions.push_back(
+      RtpHeaderExtension(kRtpAbsoluteSenderTimeHeaderExtension,
+                         kRtpAbsoluteSenderTimeHeaderExtensionDefaultId));
+  rtp_header_extensions.push_back(
+      RtpHeaderExtension(kRtpVideoRotationHeaderExtension,
+                         kRtpVideoRotationHeaderExtensionDefaultId));
+  if (webrtc::field_trial::FindFullName("WebRTC-SendSideBwe") == "Enabled") {
+    rtp_header_extensions.push_back(RtpHeaderExtension(
+        kRtpTransportSequenceNumberHeaderExtension,
+        kRtpTransportSequenceNumberHeaderExtensionDefaultId));
+  }
+  return rtp_header_extensions;
 }
 
 void WebRtcVideoEngine2::SetExternalDecoderFactory(
     WebRtcVideoDecoderFactory* decoder_factory) {
   RTC_DCHECK(!initialized_);
   external_decoder_factory_ = decoder_factory;
 }
 
 void WebRtcVideoEngine2::SetExternalEncoderFactory(
     WebRtcVideoEncoderFactory* encoder_factory) {
@@ skipping 2123 matching lines @@
       video_codecs[i].rtx_payload_type = rtx_mapping[video_codecs[i].codec.id];
     }
   }
 
   return video_codecs;
 }
 
 }  // namespace cricket
 
 #endif  // HAVE_WEBRTC_VIDEO