Cast: Make castv2 mirroring performance test run again

media/cast/video_sender/video_sender.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/cast/video_sender/video_sender.h"
 
 #include <cstring>
 #include <list>
 
 #include "base/bind.h"
@@ skipping 389 matching lines @@
     uint32 new_bitrate = 0;
     if (congestion_control_.OnNack(rtt, &new_bitrate)) {
       video_encoder_->SetBitRate(new_bitrate);
     }
   }
   ReceivedAck(cast_feedback.ack_frame_id_);
 }
 
 void VideoSender::ReceivedAck(uint32 acked_frame_id) {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
+  if (acked_frame_id == UINT32_C(0xFFFFFFFF)) {
+    // Receiver is sending a status message before any frames are ready to
+    // be acked. Ignore.
+    return;
+  }
   // Start sending RTCP packets only after receiving the first ACK, i.e. only
   // after establishing that the receiver is active.
   if (last_acked_frame_id_ == -1) {
     ScheduleNextRtcpReport();
   }
   last_acked_frame_id_ = static_cast<int>(acked_frame_id);
   base::TimeTicks now = cast_environment_->Clock()->NowTicks();
 
   RtpTimestamp rtp_timestamp =
       frame_id_to_rtp_timestamp_[acked_frame_id & 0xff];
   cast_environment_->Logging()->InsertFrameEvent(
       now, kVideoAckReceived, rtp_timestamp, acked_frame_id);
 
   VLOG(2) << "ReceivedAck:" << static_cast<int>(acked_frame_id);
-  last_acked_frame_id_ = acked_frame_id;
   active_session_ = true;
+  DCHECK_NE(-1, last_acked_frame_id_);
   UpdateFramesInFlight();
 }
 
 void VideoSender::UpdateFramesInFlight() {
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   if (last_sent_frame_id_ != -1) {
     DCHECK_LE(0, last_sent_frame_id_);
     uint32 frames_in_flight = 0;
     if (last_acked_frame_id_ != -1) {
       DCHECK_LE(0, last_acked_frame_id_);
@@ skipping 18 matching lines @@
   DCHECK(cast_environment_->CurrentlyOn(CastEnvironment::MAIN));
   MissingFramesAndPacketsMap missing_frames_and_packets;
   PacketIdSet missing;
   missing_frames_and_packets.insert(std::make_pair(resend_frame_id, missing));
   last_send_time_ = cast_environment_->Clock()->NowTicks();
   transport_sender_->ResendPackets(false, missing_frames_and_packets);
 }
 
 }  // namespace cast
 }  // namespace media