Base A/V synchronization on sync_labels.

webrtc/video/audio_receive_stream.cc

 /*
  *  Copyright (c) 2015 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 16 matching lines @@
       ss << ", ";
   }
   ss << ']';
   ss << '}';
   return ss.str();
 }
 
 std::string AudioReceiveStream::Config::ToString() const {
   std::stringstream ss;
   ss << "{rtp: " << rtp.ToString();
+  ss << ", voe_channel_id: " << voe_channel_id;
+  if (!sync_group.empty())
+    ss << ", sync_group: " << sync_group;
   ss << '}';
   return ss.str();
 }
 
 namespace internal {
 AudioReceiveStream::AudioReceiveStream(
       RemoteBitrateEstimator* remote_bitrate_estimator,
       const webrtc::AudioReceiveStream::Config& config)
     : remote_bitrate_estimator_(remote_bitrate_estimator),
       config_(config),
       rtp_header_parser_(RtpHeaderParser::Create()) {
+  DCHECK(config.voe_channel_id != -1);
   DCHECK(remote_bitrate_estimator_ != nullptr);
   DCHECK(rtp_header_parser_ != nullptr);
   for (const auto& ext : config.rtp.extensions) {
     // One-byte-extension local identifiers are in the range 1-14 inclusive.
     DCHECK_GE(ext.id, 1);
     DCHECK_LE(ext.id, 14);
     if (ext.name == RtpExtension::kAudioLevel) {
       CHECK(rtp_header_parser_->RegisterRtpHeaderExtension(
           kRtpExtensionAudioLevel, ext.id));
     } else if (ext.name == RtpExtension::kAbsSendTime) {
@@ skipping 24 matching lines @@
   if (header.extension.hasAbsoluteSendTime) {
     int64_t arrival_time_ms = TickTime::MillisecondTimestamp();
     size_t payload_size = length - header.headerLength;
     remote_bitrate_estimator_->IncomingPacket(arrival_time_ms, payload_size,
                                               header);
   }
   return true;
 }
 }  // namespace internal
 }  // namespace webrtc