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// 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 "base/test/simple_test_tick_clock.h"
#include "media/cast/pacing/mock_packet_sender.h"
#include "media/cast/pacing/paced_sender.h"
#include "media/cast/test/fake_task_runner.h"
#include "testing/gmock/include/gmock/gmock.h"
namespace media {
namespace cast {
using testing::_;
static const uint8 kValue = 123;
static const size_t kSize1 = 100;
static const size_t kSize2 = 101;
static const size_t kSize3 = 102;
static const size_t kSize4 = 103;
static const size_t kNackSize = 104;
static const int64 kStartMillisecond = 123456789;
class PacedSenderTest : public ::testing::Test {
protected:
PacedSenderTest() {
testing_clock_.Advance(
base::TimeDelta::FromMilliseconds(kStartMillisecond));
}
virtual ~PacedSenderTest() {}
virtual void SetUp() {
task_runner_ = new test::FakeTaskRunner(&testing_clock_);
cast_thread_ = new CastThread(task_runner_, task_runner_, task_runner_,
task_runner_, task_runner_);
paced_sender_.reset(new PacedSender(cast_thread_, &mock_transport_));
paced_sender_->set_clock(&testing_clock_);
}
base::SimpleTestTickClock testing_clock_;
MockPacketSender mock_transport_;
scoped_refptr<test::FakeTaskRunner> task_runner_;
scoped_ptr<PacedSender> paced_sender_;
scoped_refptr<CastThread> cast_thread_;
};
TEST_F(PacedSenderTest, PassThroughRtcp) {
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(1).WillRepeatedly(
testing::Return(true));
std::vector<uint8> packet(kSize1, kValue);
int num_of_packets = 1;
EXPECT_TRUE(paced_sender_->SendPacket(packet, num_of_packets));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(0);
EXPECT_TRUE(paced_sender_->ResendPacket(packet, num_of_packets));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(1).WillRepeatedly(
testing::Return(true));
EXPECT_TRUE(paced_sender_->SendRtcpPacket(packet));
}
TEST_F(PacedSenderTest, BasicPace) {
std::vector<uint8> packet(kSize1, kValue);
int num_of_packets = 9;
EXPECT_CALL(mock_transport_,
SendPacket(_, kSize1)).Times(3).WillRepeatedly(testing::Return(true));
for (int i = 0; i < num_of_packets; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(packet, num_of_packets));
}
base::TimeDelta timeout = base::TimeDelta::FromMilliseconds(10);
// Check that we get the next burst.
EXPECT_CALL(mock_transport_,
SendPacket(_, kSize1)).Times(3).WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// If we call process too early make sure we don't send any packets.
timeout = base::TimeDelta::FromMilliseconds(5);
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(0);
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// Check that we get the next burst.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(3).WillRepeatedly(
testing::Return(true));
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// Check that we don't get any more packets.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(0);
timeout = base::TimeDelta::FromMilliseconds(10);
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
}
TEST_F(PacedSenderTest, PaceWithNack) {
// Testing what happen when we get multiple NACK requests for a fully lost
// frames just as we sent the first packets in a frame.
std::vector<uint8> firts_packet(kSize1, kValue);
std::vector<uint8> second_packet(kSize2, kValue);
std::vector<uint8> nack_packet(kNackSize, kValue);
int num_of_packets_in_frame = 9;
int num_of_packets_in_nack = 9;
// Check that the first burst of the frame go out on the wire.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(3).WillRepeatedly(
testing::Return(true));
for (int i = 0; i < num_of_packets_in_frame; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(firts_packet,
num_of_packets_in_frame));
}
// Add first NACK request.
for (int i = 0; i < num_of_packets_in_nack; ++i) {
EXPECT_TRUE(paced_sender_->ResendPacket(nack_packet,
num_of_packets_in_nack));
}
// Check that we get the first NACK burst.
EXPECT_CALL(mock_transport_, SendPacket(_, kNackSize)).Times(5).
WillRepeatedly(testing::Return(true));
base::TimeDelta timeout = base::TimeDelta::FromMilliseconds(10);
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// Add second NACK request.
for (int i = 0; i < num_of_packets_in_nack; ++i) {
EXPECT_TRUE(paced_sender_->ResendPacket(nack_packet,
num_of_packets_in_nack));
}
// Check that we get the next NACK burst.
EXPECT_CALL(mock_transport_, SendPacket(_, kNackSize)).Times(7)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// End of NACK plus a packet from the oldest frame.
EXPECT_CALL(mock_transport_, SendPacket(_, kNackSize)).Times(6)
.WillRepeatedly(testing::Return(true));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(1)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// Add second frame.
// Make sure we don't delay the second frame due to the previous packets.
for (int i = 0; i < num_of_packets_in_frame; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(second_packet,
num_of_packets_in_frame));
}
// Last packets of frame 1 and the first packets of frame 2.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(5).WillRepeatedly(
testing::Return(true));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize2)).Times(2).WillRepeatedly(
testing::Return(true));
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// Last packets of frame 2.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize2)).Times(7).WillRepeatedly(
testing::Return(true));
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
// No more packets.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize2)).Times(0);
testing_clock_.Advance(timeout);
task_runner_->RunTasks();
}
TEST_F(PacedSenderTest, PaceWith60fps) {
// Testing what happen when we get multiple NACK requests for a fully lost
// frames just as we sent the first packets in a frame.
std::vector<uint8> firts_packet(kSize1, kValue);
std::vector<uint8> second_packet(kSize2, kValue);
std::vector<uint8> third_packet(kSize3, kValue);
std::vector<uint8> fourth_packet(kSize4, kValue);
base::TimeDelta timeout_10ms = base::TimeDelta::FromMilliseconds(10);
int num_of_packets_in_frame = 9;
// Check that the first burst of the frame go out on the wire.
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(3).WillRepeatedly(
testing::Return(true));
for (int i = 0; i < num_of_packets_in_frame; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(firts_packet,
num_of_packets_in_frame));
}
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(3).
WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(6));
// Add second frame, after 16 ms.
for (int i = 0; i < num_of_packets_in_frame; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(second_packet,
num_of_packets_in_frame));
}
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(4));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize1)).Times(3)
.WillRepeatedly(testing::Return(true));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize2)).Times(1)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
EXPECT_CALL(mock_transport_, SendPacket(_, kSize2)).Times(4)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(3));
// Add third frame, after 33 ms.
for (int i = 0; i < num_of_packets_in_frame; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(third_packet,
num_of_packets_in_frame));
}
EXPECT_CALL(mock_transport_, SendPacket(_, kSize2)).Times(4)
.WillRepeatedly(testing::Return(true));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize3)).Times(1)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(base::TimeDelta::FromMilliseconds(7));
task_runner_->RunTasks();
// Add fourth frame, after 50 ms.
for (int i = 0; i < num_of_packets_in_frame; ++i) {
EXPECT_TRUE(paced_sender_->SendPacket(fourth_packet,
num_of_packets_in_frame));
}
EXPECT_CALL(mock_transport_, SendPacket(_, kSize3)).Times(6)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
EXPECT_CALL(mock_transport_, SendPacket(_, kSize3)).Times(2)
.WillRepeatedly(testing::Return(true));
EXPECT_CALL(mock_transport_, SendPacket(_, kSize4)).Times(4)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
EXPECT_CALL(mock_transport_, SendPacket(_, kSize4)).Times(5)
.WillRepeatedly(testing::Return(true));
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
EXPECT_CALL(mock_transport_, SendPacket(_, kSize4)).Times(0);
testing_clock_.Advance(timeout_10ms);
task_runner_->RunTasks();
}
} // namespace cast
} // namespace media
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