Removing some redundant ostringstreams declarations.

webrtc/api/webrtcsdp.cc

 /*
  *  Copyright 2011 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 1384 matching lines @@
 
   // draft-ietf-mmusic-msid-11
   // a=msid:<stream id> <track id>
   if (unified_plan_sdp && !media_desc->streams().empty()) {
     if (media_desc->streams().size() > 1u) {
       LOG(LS_WARNING) << "Trying to serialize unified plan SDP with more than "
                       << "one track in a media section. Omitting 'a=msid'.";
     } else {
       auto track = media_desc->streams().begin();
       const std::string& stream_id = track->sync_label;
-      std::ostringstream os;
       InitAttrLine(kAttributeMsid, &os);
       os << kSdpDelimiterColon << stream_id << kSdpDelimiterSpace << track->id;
       AddLine(os.str(), message);
     }
   }
 
   // RFC 5761
   // a=rtcp-mux
   if (media_desc->rtcp_mux()) {
     InitAttrLine(kAttributeRtcpMux, &os);
@@ skipping 34 matching lines @@
     // if no track or media stream have been created.
     if (track->sync_label.empty()) continue;
 
     // Build the ssrc-group lines.
     for (size_t i = 0; i < track->ssrc_groups.size(); ++i) {
       // RFC 5576
       // a=ssrc-group:<semantics> <ssrc-id> ...
       if (track->ssrc_groups[i].ssrcs.empty()) {
         continue;
       }
-      std::ostringstream os;
       InitAttrLine(kAttributeSsrcGroup, &os);
       os << kSdpDelimiterColon << track->ssrc_groups[i].semantics;
       std::vector<uint32_t>::const_iterator ssrc =
           track->ssrc_groups[i].ssrcs.begin();
       for (; ssrc != track->ssrc_groups[i].ssrcs.end(); ++ssrc) {
         os << kSdpDelimiterSpace << rtc::ToString<uint32_t>(*ssrc);
       }
       AddLine(os.str(), message);
     }
     // Build the ssrc lines for each ssrc.
     for (size_t i = 0; i < track->ssrcs.size(); ++i) {
       uint32_t ssrc = track->ssrcs[i];
       // RFC 5576
       // a=ssrc:<ssrc-id> cname:<value>
       AddSsrcLine(ssrc, kSsrcAttributeCname,
                   track->cname, message);
 
       // draft-alvestrand-mmusic-msid-00
       // a=ssrc:<ssrc-id> msid:identifier [appdata]
       // The appdata consists of the "id" attribute of a MediaStreamTrack,
       // which corresponds to the "id" attribute of StreamParams.
       const std::string& stream_id = track->sync_label;
-      std::ostringstream os;
       InitAttrLine(kAttributeSsrc, &os);
       os << kSdpDelimiterColon << ssrc << kSdpDelimiterSpace
          << kSsrcAttributeMsid << kSdpDelimiterColon << stream_id
          << kSdpDelimiterSpace << track->id;
       AddLine(os.str(), message);
 
       // TODO(ronghuawu): Remove below code which is for backward
       // compatibility.
       // draft-alvestrand-rtcweb-mid-01
       // a=ssrc:<ssrc-id> mslabel:<value>
@@ skipping 1633 matching lines @@
     UpdateCodec<AudioContentDescription, cricket::AudioCodec>(
         media_desc, payload_type, feedback_param);
   } else if (media_type == cricket::MEDIA_TYPE_VIDEO) {
     UpdateCodec<VideoContentDescription, cricket::VideoCodec>(
         media_desc, payload_type, feedback_param);
   }
   return true;
 }
 
 }  // namespace webrtc