Cast: Avoid retransmit if we sent the same packet recently (less than RTT)

media/cast/transport/pacing/paced_sender_unittest.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 <stdint.h>
 
 #include "base/big_endian.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "media/cast/logging/simple_event_subscriber.h"
 #include "media/cast/test/fake_single_thread_task_runner.h"
@@ skipping 111 matching lines @@
   scoped_ptr<PacedSender> paced_sender_;
 
   DISALLOW_COPY_AND_ASSIGN(PacedSenderTest);
 };
 
 TEST_F(PacedSenderTest, PassThroughRtcp) {
   mock_transport_.AddExpectedSize(kSize1, 2);
   SendPacketVector packets = CreateSendPacketVector(kSize1, 1, true);
 
   EXPECT_TRUE(paced_sender_->SendPackets(packets));
-  EXPECT_TRUE(paced_sender_->ResendPackets(packets));
+  EXPECT_TRUE(paced_sender_->ResendPackets(packets, base::TimeDelta()));
 
   mock_transport_.AddExpectedSize(kSize2, 1);
   Packet tmp(kSize2, kValue);
   EXPECT_TRUE(paced_sender_->SendRtcpPacket(
       1,
       new base::RefCountedData<Packet>(tmp)));
 }
 
 TEST_F(PacedSenderTest, BasicPace) {
   int num_of_packets = 27;
@@ skipping 52 matching lines @@
       CreateSendPacketVector(kSize1, num_of_packets_in_frame, false);
 
   SendPacketVector second_frame_packets =
       CreateSendPacketVector(kSize2, num_of_packets_in_frame, true);
 
   // Check that the first burst of the frame go out on the wire.
   mock_transport_.AddExpectedSize(kSize1, 10);
   EXPECT_TRUE(paced_sender_->SendPackets(first_frame_packets));
 
   // Add first NACK request.
-  EXPECT_TRUE(paced_sender_->ResendPackets(nack_packets));
+  EXPECT_TRUE(paced_sender_->ResendPackets(nack_packets, base::TimeDelta()));
 
   // Check that we get the first NACK burst.
   mock_transport_.AddExpectedSize(kNackSize, 10);
   base::TimeDelta timeout = base::TimeDelta::FromMilliseconds(10);
   testing_clock_.Advance(timeout);
   task_runner_->RunTasks();
 
   // Add second NACK request.
-  EXPECT_TRUE(paced_sender_->ResendPackets(nack_packets));
+  EXPECT_TRUE(paced_sender_->ResendPackets(nack_packets, base::TimeDelta()));
 
   // Check that we get the next NACK burst.
   mock_transport_.AddExpectedSize(kNackSize, 10);
   testing_clock_.Advance(timeout);
   task_runner_->RunTasks();
 
   // End of NACK plus two packets from the oldest frame.
   // Note that two of the NACKs have been de-duped.
   mock_transport_.AddExpectedSize(kNackSize, 2);
   mock_transport_.AddExpectedSize(kSize1, 2);
@@ skipping 117 matching lines @@
   testing_clock_.Advance(timeout_10ms);
   task_runner_->RunTasks();
 
   // No more packets.
   EXPECT_TRUE(RunUntilEmpty(5));
 }
 
 }  // namespace transport
 }  // namespace cast
 }  // namespace media