Support external audio mixer.

webrtc/api/peerconnection.cc

 /*
  *  Copyright 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.
  */
 
@@ skipping 1335 matching lines @@
 
 void PeerConnection::Close() {
   TRACE_EVENT0("webrtc", "PeerConnection::Close");
   // Update stats here so that we have the most recent stats for tracks and
   // streams before the channels are closed.
   stats_->UpdateStats(kStatsOutputLevelStandard);
 
   session_->Close();
 }
 
+std::vector<uint32_t> PeerConnection::GetRemoteAudioTrackSsrcs() {

[aleloi, 2016/12/05 14:03:08]

See comment at declaration.

+  std::vector<uint32_t> ssrcs;
+  TrackInfos* infos = GetRemoteTracks(cricket::MEDIA_TYPE_AUDIO);
+  for (const auto& info : *infos)
+    ssrcs.push_back(info.ssrc);
+
+  return ssrcs;
+}
+
 void PeerConnection::OnSessionStateChange(WebRtcSession* /*session*/,
                                           WebRtcSession::State state) {
   switch (state) {
     case WebRtcSession::STATE_INIT:
       ChangeSignalingState(PeerConnectionInterface::kStable);
       break;
     case WebRtcSession::STATE_SENTOFFER:
       ChangeSignalingState(PeerConnectionInterface::kHaveLocalOffer);
       break;
     case WebRtcSession::STATE_SENTPRANSWER:
@@ skipping 1001 matching lines @@
 
 bool PeerConnection::StartRtcEventLog_w(rtc::PlatformFile file,
                                         int64_t max_size_bytes) {
   return event_log_->StartLogging(file, max_size_bytes);
 }
 
 void PeerConnection::StopRtcEventLog_w() {
   event_log_->StopLogging();
 }
 }  // namespace webrtc