diff options
Diffstat (limited to 'chromium/media/cast/receiver/frame_receiver_unittest.cc')
| -rw-r--r-- | chromium/media/cast/receiver/frame_receiver_unittest.cc | 419 |
1 files changed, 419 insertions, 0 deletions
diff --git a/chromium/media/cast/receiver/frame_receiver_unittest.cc b/chromium/media/cast/receiver/frame_receiver_unittest.cc new file mode 100644 index 00000000000..4d8273e132a --- /dev/null +++ b/chromium/media/cast/receiver/frame_receiver_unittest.cc @@ -0,0 +1,419 @@ +// Copyright 2014 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 <deque> +#include <utility> + +#include "base/bind.h" +#include "base/memory/ref_counted.h" +#include "base/memory/scoped_ptr.h" +#include "base/test/simple_test_tick_clock.h" +#include "media/cast/cast_defines.h" +#include "media/cast/cast_environment.h" +#include "media/cast/logging/simple_event_subscriber.h" +#include "media/cast/receiver/frame_receiver.h" +#include "media/cast/rtcp/test_rtcp_packet_builder.h" +#include "media/cast/test/fake_single_thread_task_runner.h" +#include "media/cast/test/utility/default_config.h" +#include "media/cast/transport/pacing/mock_paced_packet_sender.h" +#include "testing/gmock/include/gmock/gmock.h" + +using ::testing::_; + +namespace media { +namespace cast { + +namespace { + +const int kPacketSize = 1500; +const uint32 kFirstFrameId = 1234; +const int kPlayoutDelayMillis = 100; + +class FakeFrameClient { + public: + FakeFrameClient() : num_called_(0) {} + virtual ~FakeFrameClient() {} + + void AddExpectedResult(uint32 expected_frame_id, + const base::TimeTicks& expected_playout_time) { + expected_results_.push_back( + std::make_pair(expected_frame_id, expected_playout_time)); + } + + void DeliverEncodedFrame(scoped_ptr<transport::EncodedFrame> frame) { + SCOPED_TRACE(::testing::Message() << "num_called_ is " << num_called_); + ASSERT_FALSE(!frame) + << "If at shutdown: There were unsatisfied requests enqueued."; + ASSERT_FALSE(expected_results_.empty()); + EXPECT_EQ(expected_results_.front().first, frame->frame_id); + EXPECT_EQ(expected_results_.front().second, frame->reference_time); + expected_results_.pop_front(); + ++num_called_; + } + + int number_times_called() const { return num_called_; } + + private: + std::deque<std::pair<uint32, base::TimeTicks> > expected_results_; + int num_called_; + + DISALLOW_COPY_AND_ASSIGN(FakeFrameClient); +}; +} // namespace + +class FrameReceiverTest : public ::testing::Test { + protected: + FrameReceiverTest() { + testing_clock_ = new base::SimpleTestTickClock(); + testing_clock_->Advance(base::TimeTicks::Now() - base::TimeTicks()); + start_time_ = testing_clock_->NowTicks(); + task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_); + + cast_environment_ = + new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_).Pass(), + task_runner_, + task_runner_, + task_runner_); + } + + virtual ~FrameReceiverTest() {} + + virtual void SetUp() { + payload_.assign(kPacketSize, 0); + + // Always start with a key frame. + rtp_header_.is_key_frame = true; + rtp_header_.frame_id = kFirstFrameId; + rtp_header_.packet_id = 0; + rtp_header_.max_packet_id = 0; + rtp_header_.reference_frame_id = rtp_header_.frame_id; + rtp_header_.rtp_timestamp = 0; + } + + void CreateFrameReceiverOfAudio() { + config_ = GetDefaultAudioReceiverConfig(); + config_.rtp_max_delay_ms = kPlayoutDelayMillis; + + receiver_.reset(new FrameReceiver( + cast_environment_, config_, AUDIO_EVENT, &mock_transport_)); + } + + void CreateFrameReceiverOfVideo() { + config_ = GetDefaultVideoReceiverConfig(); + config_.rtp_max_delay_ms = kPlayoutDelayMillis; + // Note: Frame rate must divide 1000 without remainder so the test code + // doesn't have to account for rounding errors. + config_.max_frame_rate = 25; + + receiver_.reset(new FrameReceiver( + cast_environment_, config_, VIDEO_EVENT, &mock_transport_)); + } + + void FeedOneFrameIntoReceiver() { + // Note: For testing purposes, a frame consists of only a single packet. + receiver_->ProcessParsedPacket( + rtp_header_, payload_.data(), payload_.size()); + } + + void FeedLipSyncInfoIntoReceiver() { + const base::TimeTicks now = testing_clock_->NowTicks(); + const int64 rtp_timestamp = (now - start_time_) * + config_.frequency / base::TimeDelta::FromSeconds(1); + CHECK_LE(0, rtp_timestamp); + uint32 ntp_seconds; + uint32 ntp_fraction; + ConvertTimeTicksToNtp(now, &ntp_seconds, &ntp_fraction); + TestRtcpPacketBuilder rtcp_packet; + rtcp_packet.AddSrWithNtp(config_.incoming_ssrc, + ntp_seconds, ntp_fraction, + static_cast<uint32>(rtp_timestamp)); + ASSERT_TRUE(receiver_->ProcessPacket(rtcp_packet.GetPacket().Pass())); + } + + FrameReceiverConfig config_; + std::vector<uint8> payload_; + RtpCastHeader rtp_header_; + base::SimpleTestTickClock* testing_clock_; // Owned by CastEnvironment. + base::TimeTicks start_time_; + transport::MockPacedPacketSender mock_transport_; + scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_; + scoped_refptr<CastEnvironment> cast_environment_; + FakeFrameClient frame_client_; + + // Important for the FrameReceiver to be declared last, since its dependencies + // must remain alive until after its destruction. + scoped_ptr<FrameReceiver> receiver_; + + DISALLOW_COPY_AND_ASSIGN(FrameReceiverTest); +}; + +TEST_F(FrameReceiverTest, RejectsUnparsablePackets) { + CreateFrameReceiverOfVideo(); + + SimpleEventSubscriber event_subscriber; + cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber); + + const bool success = receiver_->ProcessPacket( + scoped_ptr<Packet>(new Packet(kPacketSize, 0xff)).Pass()); + EXPECT_FALSE(success); + + // Confirm no log events. + std::vector<FrameEvent> frame_events; + event_subscriber.GetFrameEventsAndReset(&frame_events); + EXPECT_TRUE(frame_events.empty()); + cast_environment_->Logging()->RemoveRawEventSubscriber(&event_subscriber); +} + +TEST_F(FrameReceiverTest, ReceivesOneFrame) { + CreateFrameReceiverOfAudio(); + + SimpleEventSubscriber event_subscriber; + cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber); + + EXPECT_CALL(mock_transport_, SendRtcpPacket(_, _)) + .WillRepeatedly(testing::Return(true)); + + FeedLipSyncInfoIntoReceiver(); + task_runner_->RunTasks(); + + // Enqueue a request for a frame. + receiver_->RequestEncodedFrame( + base::Bind(&FakeFrameClient::DeliverEncodedFrame, + base::Unretained(&frame_client_))); + + // The request should not be satisfied since no packets have been received. + task_runner_->RunTasks(); + EXPECT_EQ(0, frame_client_.number_times_called()); + + // Deliver one frame to the receiver and expect to get one frame back. + const base::TimeDelta target_playout_delay = + base::TimeDelta::FromMilliseconds(kPlayoutDelayMillis); + frame_client_.AddExpectedResult( + kFirstFrameId, testing_clock_->NowTicks() + target_playout_delay); + FeedOneFrameIntoReceiver(); + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Was the frame logged? + std::vector<FrameEvent> frame_events; + event_subscriber.GetFrameEventsAndReset(&frame_events); + ASSERT_TRUE(!frame_events.empty()); + EXPECT_EQ(FRAME_ACK_SENT, frame_events.begin()->type); + EXPECT_EQ(AUDIO_EVENT, frame_events.begin()->media_type); + EXPECT_EQ(rtp_header_.frame_id, frame_events.begin()->frame_id); + EXPECT_EQ(rtp_header_.rtp_timestamp, frame_events.begin()->rtp_timestamp); + cast_environment_->Logging()->RemoveRawEventSubscriber(&event_subscriber); +} + +TEST_F(FrameReceiverTest, ReceivesFramesSkippingWhenAppropriate) { + CreateFrameReceiverOfAudio(); + + SimpleEventSubscriber event_subscriber; + cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber); + + EXPECT_CALL(mock_transport_, SendRtcpPacket(_, _)) + .WillRepeatedly(testing::Return(true)); + + const uint32 rtp_advance_per_frame = + config_.frequency / config_.max_frame_rate; + const base::TimeDelta time_advance_per_frame = + base::TimeDelta::FromSeconds(1) / config_.max_frame_rate; + + // Feed and process lip sync in receiver. + FeedLipSyncInfoIntoReceiver(); + task_runner_->RunTasks(); + const base::TimeTicks first_frame_capture_time = testing_clock_->NowTicks(); + + // Enqueue a request for a frame. + const ReceiveEncodedFrameCallback frame_encoded_callback = + base::Bind(&FakeFrameClient::DeliverEncodedFrame, + base::Unretained(&frame_client_)); + receiver_->RequestEncodedFrame(frame_encoded_callback); + task_runner_->RunTasks(); + EXPECT_EQ(0, frame_client_.number_times_called()); + + // Receive one frame and expect to see the first request satisfied. + const base::TimeDelta target_playout_delay = + base::TimeDelta::FromMilliseconds(kPlayoutDelayMillis); + frame_client_.AddExpectedResult( + kFirstFrameId, first_frame_capture_time + target_playout_delay); + rtp_header_.rtp_timestamp = 0; + FeedOneFrameIntoReceiver(); // Frame 1 + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Enqueue a second request for a frame, but it should not be fulfilled yet. + receiver_->RequestEncodedFrame(frame_encoded_callback); + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Receive one frame out-of-order: Make sure that we are not continuous and + // that the RTP timestamp represents a time in the future. + rtp_header_.frame_id = kFirstFrameId + 2; // "Frame 3" + rtp_header_.reference_frame_id = rtp_header_.frame_id; + rtp_header_.rtp_timestamp += 2 * rtp_advance_per_frame; + frame_client_.AddExpectedResult( + kFirstFrameId + 2, + first_frame_capture_time + 2 * time_advance_per_frame + + target_playout_delay); + FeedOneFrameIntoReceiver(); // Frame 3 + + // Frame 2 should not come out at this point in time. + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Enqueue a third request for a frame. + receiver_->RequestEncodedFrame(frame_encoded_callback); + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Now, advance time forward such that the receiver is convinced it should + // skip Frame 2. Frame 3 is emitted (to satisfy the second request) because a + // decision was made to skip over the no-show Frame 2. + testing_clock_->Advance(2 * time_advance_per_frame + target_playout_delay); + task_runner_->RunTasks(); + EXPECT_EQ(2, frame_client_.number_times_called()); + + // Receive Frame 4 and expect it to fulfill the third request immediately. + rtp_header_.frame_id = kFirstFrameId + 3; // "Frame 4" + rtp_header_.reference_frame_id = rtp_header_.frame_id; + rtp_header_.rtp_timestamp += rtp_advance_per_frame; + frame_client_.AddExpectedResult( + kFirstFrameId + 3, first_frame_capture_time + 3 * time_advance_per_frame + + target_playout_delay); + FeedOneFrameIntoReceiver(); // Frame 4 + task_runner_->RunTasks(); + EXPECT_EQ(3, frame_client_.number_times_called()); + + // Move forward to the playout time of an unreceived Frame 5. Expect no + // additional frames were emitted. + testing_clock_->Advance(3 * time_advance_per_frame); + task_runner_->RunTasks(); + EXPECT_EQ(3, frame_client_.number_times_called()); + + // Were only non-skipped frames logged? + std::vector<FrameEvent> frame_events; + event_subscriber.GetFrameEventsAndReset(&frame_events); + ASSERT_TRUE(!frame_events.empty()); + for (size_t i = 0; i < frame_events.size(); ++i) { + EXPECT_EQ(FRAME_ACK_SENT, frame_events[i].type); + EXPECT_EQ(AUDIO_EVENT, frame_events[i].media_type); + EXPECT_LE(kFirstFrameId, frame_events[i].frame_id); + EXPECT_GE(kFirstFrameId + 4, frame_events[i].frame_id); + const int frame_offset = frame_events[i].frame_id - kFirstFrameId; + EXPECT_NE(frame_offset, 1); // Frame 2 never received. + EXPECT_EQ(frame_offset * rtp_advance_per_frame, + frame_events[i].rtp_timestamp); + } + cast_environment_->Logging()->RemoveRawEventSubscriber(&event_subscriber); +} + +TEST_F(FrameReceiverTest, ReceivesFramesRefusingToSkipAny) { + CreateFrameReceiverOfVideo(); + + SimpleEventSubscriber event_subscriber; + cast_environment_->Logging()->AddRawEventSubscriber(&event_subscriber); + + EXPECT_CALL(mock_transport_, SendRtcpPacket(_, _)) + .WillRepeatedly(testing::Return(true)); + + const uint32 rtp_advance_per_frame = + config_.frequency / config_.max_frame_rate; + const base::TimeDelta time_advance_per_frame = + base::TimeDelta::FromSeconds(1) / config_.max_frame_rate; + + // Feed and process lip sync in receiver. + FeedLipSyncInfoIntoReceiver(); + task_runner_->RunTasks(); + const base::TimeTicks first_frame_capture_time = testing_clock_->NowTicks(); + + // Enqueue a request for a frame. + const ReceiveEncodedFrameCallback frame_encoded_callback = + base::Bind(&FakeFrameClient::DeliverEncodedFrame, + base::Unretained(&frame_client_)); + receiver_->RequestEncodedFrame(frame_encoded_callback); + task_runner_->RunTasks(); + EXPECT_EQ(0, frame_client_.number_times_called()); + + // Receive one frame and expect to see the first request satisfied. + const base::TimeDelta target_playout_delay = + base::TimeDelta::FromMilliseconds(kPlayoutDelayMillis); + frame_client_.AddExpectedResult( + kFirstFrameId, first_frame_capture_time + target_playout_delay); + rtp_header_.rtp_timestamp = 0; + FeedOneFrameIntoReceiver(); // Frame 1 + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Enqueue a second request for a frame, but it should not be fulfilled yet. + receiver_->RequestEncodedFrame(frame_encoded_callback); + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Receive one frame out-of-order: Make sure that we are not continuous and + // that the RTP timestamp represents a time in the future. + rtp_header_.is_key_frame = false; + rtp_header_.frame_id = kFirstFrameId + 2; // "Frame 3" + rtp_header_.reference_frame_id = kFirstFrameId + 1; // "Frame 2" + rtp_header_.rtp_timestamp += 2 * rtp_advance_per_frame; + FeedOneFrameIntoReceiver(); // Frame 3 + + // Frame 2 should not come out at this point in time. + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Enqueue a third request for a frame. + receiver_->RequestEncodedFrame(frame_encoded_callback); + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Now, advance time forward such that Frame 2 is now too late for playback. + // Regardless, the receiver must NOT emit Frame 3 yet because it is not + // allowed to skip frames when dependencies are not satisfied. In other + // words, Frame 3 is not decodable without Frame 2. + testing_clock_->Advance(2 * time_advance_per_frame + target_playout_delay); + task_runner_->RunTasks(); + EXPECT_EQ(1, frame_client_.number_times_called()); + + // Now receive Frame 2 and expect both the second and third requests to be + // fulfilled immediately. + frame_client_.AddExpectedResult( + kFirstFrameId + 1, // "Frame 2" + first_frame_capture_time + 1 * time_advance_per_frame + + target_playout_delay); + frame_client_.AddExpectedResult( + kFirstFrameId + 2, // "Frame 3" + first_frame_capture_time + 2 * time_advance_per_frame + + target_playout_delay); + --rtp_header_.frame_id; // "Frame 2" + --rtp_header_.reference_frame_id; // "Frame 1" + rtp_header_.rtp_timestamp -= rtp_advance_per_frame; + FeedOneFrameIntoReceiver(); // Frame 2 + task_runner_->RunTasks(); + EXPECT_EQ(3, frame_client_.number_times_called()); + + // Move forward to the playout time of an unreceived Frame 5. Expect no + // additional frames were emitted. + testing_clock_->Advance(3 * time_advance_per_frame); + task_runner_->RunTasks(); + EXPECT_EQ(3, frame_client_.number_times_called()); + + // Sanity-check logging results. + std::vector<FrameEvent> frame_events; + event_subscriber.GetFrameEventsAndReset(&frame_events); + ASSERT_TRUE(!frame_events.empty()); + for (size_t i = 0; i < frame_events.size(); ++i) { + EXPECT_EQ(FRAME_ACK_SENT, frame_events[i].type); + EXPECT_EQ(VIDEO_EVENT, frame_events[i].media_type); + EXPECT_LE(kFirstFrameId, frame_events[i].frame_id); + EXPECT_GE(kFirstFrameId + 3, frame_events[i].frame_id); + const int frame_offset = frame_events[i].frame_id - kFirstFrameId; + EXPECT_EQ(frame_offset * rtp_advance_per_frame, + frame_events[i].rtp_timestamp); + } + cast_environment_->Logging()->RemoveRawEventSubscriber(&event_subscriber); +} + +} // namespace cast +} // namespace media |