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641d59b337
This allows trading off some potential media quality for CPU usage. Bug: webrtc:8975 Change-Id: I447a03f596e9e711ba5d7038fe71f27bd80bf795 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172085 Commit-Queue: Erik Språng <sprang@webrtc.org> Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Cr-Commit-Position: refs/heads/master@{#30936}
841 lines
34 KiB
C++
841 lines
34 KiB
C++
/*
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* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/rtp_rtcp/source/rtp_packet_history.h"
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#include <memory>
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#include <utility>
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#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
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#include "modules/rtp_rtcp/source/rtp_packet_to_send.h"
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#include "system_wrappers/include/clock.h"
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#include "test/gmock.h"
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#include "test/gtest.h"
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namespace webrtc {
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namespace {
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// Set a high sequence number so we'll suffer a wrap-around.
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constexpr uint16_t kStartSeqNum = 65534u;
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// Utility method for truncating sequence numbers to uint16.
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uint16_t To16u(size_t sequence_number) {
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return static_cast<uint16_t>(sequence_number & 0xFFFF);
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}
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} // namespace
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using StorageMode = RtpPacketHistory::StorageMode;
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class RtpPacketHistoryTest : public ::testing::TestWithParam<bool> {
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protected:
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RtpPacketHistoryTest()
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: fake_clock_(123456),
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hist_(&fake_clock_, /*enable_padding_prio=*/GetParam()) {}
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SimulatedClock fake_clock_;
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RtpPacketHistory hist_;
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std::unique_ptr<RtpPacketToSend> CreateRtpPacket(uint16_t seq_num) {
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// Payload, ssrc, timestamp and extensions are irrelevant for this tests.
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std::unique_ptr<RtpPacketToSend> packet(new RtpPacketToSend(nullptr));
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packet->SetSequenceNumber(seq_num);
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packet->set_capture_time_ms(fake_clock_.TimeInMilliseconds());
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packet->set_allow_retransmission(true);
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return packet;
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}
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};
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TEST_P(RtpPacketHistoryTest, SetStoreStatus) {
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EXPECT_EQ(StorageMode::kDisabled, hist_.GetStorageMode());
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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EXPECT_EQ(StorageMode::kStoreAndCull, hist_.GetStorageMode());
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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EXPECT_EQ(StorageMode::kStoreAndCull, hist_.GetStorageMode());
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hist_.SetStorePacketsStatus(StorageMode::kDisabled, 0);
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EXPECT_EQ(StorageMode::kDisabled, hist_.GetStorageMode());
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}
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TEST_P(RtpPacketHistoryTest, ClearsHistoryAfterSetStoreStatus) {
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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// Store a packet, but with send-time. It should then not be removed.
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hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum), absl::nullopt);
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// Changing store status, even to the current one, will clear the history.
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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}
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TEST_P(RtpPacketHistoryTest, StartSeqResetAfterReset) {
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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// Store a packet, but with send-time. It should then not be removed.
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hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum), absl::nullopt);
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// Changing store status, to clear the history.
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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// Add a new packet.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 1)), absl::nullopt);
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
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// Advance time past where packet expires.
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fake_clock_.AdvanceTimeMilliseconds(
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RtpPacketHistory::kPacketCullingDelayFactor *
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RtpPacketHistory::kMinPacketDurationMs);
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// Add one more packet and verify no state left from packet before reset.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 2)), absl::nullopt);
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 2)));
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}
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TEST_P(RtpPacketHistoryTest, NoStoreStatus) {
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EXPECT_EQ(StorageMode::kDisabled, hist_.GetStorageMode());
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std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
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hist_.PutRtpPacket(std::move(packet), absl::nullopt);
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// Packet should not be stored.
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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}
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TEST_P(RtpPacketHistoryTest, GetRtpPacket_NotStored) {
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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EXPECT_FALSE(hist_.GetPacketState(0));
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}
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TEST_P(RtpPacketHistoryTest, PutRtpPacket) {
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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hist_.PutRtpPacket(std::move(packet), absl::nullopt);
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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}
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TEST_P(RtpPacketHistoryTest, GetRtpPacket) {
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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int64_t capture_time_ms = 1;
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std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
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packet->set_capture_time_ms(capture_time_ms);
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rtc::CopyOnWriteBuffer buffer = packet->Buffer();
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hist_.PutRtpPacket(std::move(packet), absl::nullopt);
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std::unique_ptr<RtpPacketToSend> packet_out =
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hist_.GetPacketAndSetSendTime(kStartSeqNum);
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EXPECT_TRUE(packet_out);
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EXPECT_EQ(buffer, packet_out->Buffer());
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EXPECT_EQ(capture_time_ms, packet_out->capture_time_ms());
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}
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TEST_P(RtpPacketHistoryTest, PacketStateIsCorrect) {
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const uint32_t kSsrc = 92384762;
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const int64_t kRttMs = 100;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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hist_.SetRtt(kRttMs);
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std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
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packet->SetSsrc(kSsrc);
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packet->SetPayloadSize(1234);
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const size_t packet_size = packet->size();
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hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
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absl::optional<RtpPacketHistory::PacketState> state =
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hist_.GetPacketState(kStartSeqNum);
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ASSERT_TRUE(state);
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EXPECT_EQ(state->rtp_sequence_number, kStartSeqNum);
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EXPECT_EQ(state->send_time_ms, fake_clock_.TimeInMilliseconds());
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EXPECT_EQ(state->capture_time_ms, fake_clock_.TimeInMilliseconds());
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EXPECT_EQ(state->ssrc, kSsrc);
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EXPECT_EQ(state->packet_size, packet_size);
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EXPECT_EQ(state->times_retransmitted, 0u);
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fake_clock_.AdvanceTimeMilliseconds(1);
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EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
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fake_clock_.AdvanceTimeMilliseconds(kRttMs + 1);
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state = hist_.GetPacketState(kStartSeqNum);
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ASSERT_TRUE(state);
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EXPECT_EQ(state->times_retransmitted, 1u);
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}
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TEST_P(RtpPacketHistoryTest, MinResendTimeWithPacer) {
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static const int64_t kMinRetransmitIntervalMs = 100;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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hist_.SetRtt(kMinRetransmitIntervalMs);
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int64_t capture_time_ms = fake_clock_.TimeInMilliseconds();
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std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
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size_t len = packet->size();
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hist_.PutRtpPacket(std::move(packet), absl::nullopt);
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// First transmission: TimeToSendPacket() call from pacer.
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EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
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// First retransmission - allow early retransmission.
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fake_clock_.AdvanceTimeMilliseconds(1);
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// With pacer there's two calls to history:
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// 1) When the NACK request arrived, use GetPacketState() to see if the
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// packet is there and verify RTT constraints. Then we use the ssrc
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// and sequence number to enqueue the retransmission in the pacer
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// 2) When the pacer determines that it is time to send the packet, it calls
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// GetPacketAndSetSendTime().
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absl::optional<RtpPacketHistory::PacketState> packet_state =
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hist_.GetPacketState(kStartSeqNum);
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EXPECT_TRUE(packet_state);
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EXPECT_EQ(len, packet_state->packet_size);
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EXPECT_EQ(capture_time_ms, packet_state->capture_time_ms);
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// Retransmission was allowed, next send it from pacer.
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EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
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// Second retransmission - advance time to just before retransmission OK.
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fake_clock_.AdvanceTimeMilliseconds(kMinRetransmitIntervalMs - 1);
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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// Advance time to just after retransmission OK.
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fake_clock_.AdvanceTimeMilliseconds(1);
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
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}
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TEST_P(RtpPacketHistoryTest, MinResendTimeWithoutPacer) {
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static const int64_t kMinRetransmitIntervalMs = 100;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
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hist_.SetRtt(kMinRetransmitIntervalMs);
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int64_t capture_time_ms = fake_clock_.TimeInMilliseconds();
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std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
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size_t len = packet->size();
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hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
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// First retransmission - allow early retransmission.
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fake_clock_.AdvanceTimeMilliseconds(1);
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packet = hist_.GetPacketAndSetSendTime(kStartSeqNum);
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EXPECT_TRUE(packet);
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EXPECT_EQ(len, packet->size());
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EXPECT_EQ(capture_time_ms, packet->capture_time_ms());
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// Second retransmission - advance time to just before retransmission OK.
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fake_clock_.AdvanceTimeMilliseconds(kMinRetransmitIntervalMs - 1);
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EXPECT_FALSE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
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// Advance time to just after retransmission OK.
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fake_clock_.AdvanceTimeMilliseconds(1);
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EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
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}
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TEST_P(RtpPacketHistoryTest, RemovesOldestSentPacketWhenAtMaxSize) {
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const size_t kMaxNumPackets = 10;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, kMaxNumPackets);
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// History does not allow removing packets within kMinPacketDurationMs,
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// so in order to test capacity, make sure insertion spans this time.
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const int64_t kPacketIntervalMs =
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RtpPacketHistory::kMinPacketDurationMs / kMaxNumPackets;
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// Add packets until the buffer is full.
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for (size_t i = 0; i < kMaxNumPackets; ++i) {
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std::unique_ptr<RtpPacketToSend> packet =
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CreateRtpPacket(To16u(kStartSeqNum + i));
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// Immediate mark packet as sent.
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hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
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fake_clock_.AdvanceTimeMilliseconds(kPacketIntervalMs);
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}
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// First packet should still be there.
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// History is full, oldest one should be overwritten.
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std::unique_ptr<RtpPacketToSend> packet =
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CreateRtpPacket(To16u(kStartSeqNum + kMaxNumPackets));
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hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
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// Oldest packet should be gone, but packet after than one still present.
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
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}
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TEST_P(RtpPacketHistoryTest, RemovesOldestPacketWhenAtMaxCapacity) {
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// Tests the absolute upper bound on number of stored packets. Don't allow
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// storing more than this, even if packets have not yet been sent.
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const size_t kMaxNumPackets = RtpPacketHistory::kMaxCapacity;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull,
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RtpPacketHistory::kMaxCapacity);
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// Add packets until the buffer is full.
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for (size_t i = 0; i < kMaxNumPackets; ++i) {
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std::unique_ptr<RtpPacketToSend> packet =
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CreateRtpPacket(To16u(kStartSeqNum + i));
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// Don't mark packets as sent, preventing them from being removed.
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hist_.PutRtpPacket(std::move(packet), absl::nullopt);
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}
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// First packet should still be there.
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// History is full, oldest one should be overwritten.
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std::unique_ptr<RtpPacketToSend> packet =
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CreateRtpPacket(To16u(kStartSeqNum + kMaxNumPackets));
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hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
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// Oldest packet should be gone, but packet after than one still present.
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
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}
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TEST_P(RtpPacketHistoryTest, RemovesLowestPrioPaddingWhenAtMaxCapacity) {
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if (!GetParam()) {
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// Padding prioritization is off, ignore this test.
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return;
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}
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// Tests the absolute upper bound on number of packets in the prioritized
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// set of potential padding packets.
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const size_t kMaxNumPackets = RtpPacketHistory::kMaxPaddingtHistory;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, kMaxNumPackets * 2);
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hist_.SetRtt(1);
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// Add packets until the max is reached, and then yet another one.
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for (size_t i = 0; i < kMaxNumPackets + 1; ++i) {
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std::unique_ptr<RtpPacketToSend> packet =
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CreateRtpPacket(To16u(kStartSeqNum + i));
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// Don't mark packets as sent, preventing them from being removed.
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hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
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}
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// Advance time to allow retransmission/padding.
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fake_clock_.AdvanceTimeMilliseconds(1);
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// The oldest packet will be least prioritized and has fallen out of the
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// priority set.
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for (size_t i = kMaxNumPackets - 1; i > 0; --i) {
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auto packet = hist_.GetPayloadPaddingPacket();
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ASSERT_TRUE(packet);
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EXPECT_EQ(packet->SequenceNumber(), To16u(kStartSeqNum + i + 1));
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}
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// Wrap around to newest padding packet again.
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auto packet = hist_.GetPayloadPaddingPacket();
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ASSERT_TRUE(packet);
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EXPECT_EQ(packet->SequenceNumber(), To16u(kStartSeqNum + kMaxNumPackets));
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}
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TEST_P(RtpPacketHistoryTest, DontRemoveUnsentPackets) {
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const size_t kMaxNumPackets = 10;
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, kMaxNumPackets);
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// Add packets until the buffer is full.
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for (size_t i = 0; i < kMaxNumPackets; ++i) {
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// Mark packets as unsent.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + i)), absl::nullopt);
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}
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fake_clock_.AdvanceTimeMilliseconds(RtpPacketHistory::kMinPacketDurationMs);
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// First packet should still be there.
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// History is full, but old packets not sent, so allow expansion.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + kMaxNumPackets)),
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fake_clock_.TimeInMilliseconds());
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// Set all packet as sent and advance time past min packet duration time,
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// otherwise packets till still be prevented from being removed.
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for (size_t i = 0; i <= kMaxNumPackets; ++i) {
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EXPECT_TRUE(hist_.GetPacketAndSetSendTime(To16u(kStartSeqNum + i)));
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}
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fake_clock_.AdvanceTimeMilliseconds(RtpPacketHistory::kMinPacketDurationMs);
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// Add a new packet, this means the two oldest ones will be culled.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + kMaxNumPackets + 1)),
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fake_clock_.TimeInMilliseconds());
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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EXPECT_FALSE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 2)));
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}
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TEST_P(RtpPacketHistoryTest, DontRemoveTooRecentlyTransmittedPackets) {
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// Set size to remove old packets as soon as possible.
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
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// Add a packet, marked as send, and advance time to just before removal time.
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hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
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fake_clock_.TimeInMilliseconds());
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fake_clock_.AdvanceTimeMilliseconds(RtpPacketHistory::kMinPacketDurationMs -
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1);
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// Add a new packet to trigger culling.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 1)),
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fake_clock_.TimeInMilliseconds());
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// First packet should still be there.
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// Advance time to where packet will be eligible for removal and try again.
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fake_clock_.AdvanceTimeMilliseconds(1);
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 2)),
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fake_clock_.TimeInMilliseconds());
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// First packet should no be gone, but next one still there.
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EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
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EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
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}
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TEST_P(RtpPacketHistoryTest, DontRemoveTooRecentlyTransmittedPacketsHighRtt) {
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const int64_t kRttMs = RtpPacketHistory::kMinPacketDurationMs * 2;
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const int64_t kPacketTimeoutMs =
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kRttMs * RtpPacketHistory::kMinPacketDurationRtt;
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// Set size to remove old packets as soon as possible.
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hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
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hist_.SetRtt(kRttMs);
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// Add a packet, marked as send, and advance time to just before removal time.
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hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
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fake_clock_.TimeInMilliseconds());
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fake_clock_.AdvanceTimeMilliseconds(kPacketTimeoutMs - 1);
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// Add a new packet to trigger culling.
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hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 1)),
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fake_clock_.TimeInMilliseconds());
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// First packet should still be there.
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EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
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// Advance time to where packet will be eligible for removal and try again.
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fake_clock_.AdvanceTimeMilliseconds(1);
|
|
hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 2)),
|
|
fake_clock_.TimeInMilliseconds());
|
|
// First packet should no be gone, but next one still there.
|
|
EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
|
|
EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)));
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, RemovesOldWithCulling) {
|
|
const size_t kMaxNumPackets = 10;
|
|
// Enable culling. Even without feedback, this can trigger early removal.
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, kMaxNumPackets);
|
|
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
|
|
int64_t kMaxPacketDurationMs = RtpPacketHistory::kMinPacketDurationMs *
|
|
RtpPacketHistory::kPacketCullingDelayFactor;
|
|
fake_clock_.AdvanceTimeMilliseconds(kMaxPacketDurationMs - 1);
|
|
|
|
// First packet should still be there.
|
|
EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
|
|
|
|
// Advance to where packet can be culled, even if buffer is not full.
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 1)),
|
|
fake_clock_.TimeInMilliseconds());
|
|
|
|
EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, RemovesOldWithCullingHighRtt) {
|
|
const size_t kMaxNumPackets = 10;
|
|
const int64_t kRttMs = RtpPacketHistory::kMinPacketDurationMs * 2;
|
|
// Enable culling. Even without feedback, this can trigger early removal.
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, kMaxNumPackets);
|
|
hist_.SetRtt(kRttMs);
|
|
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
|
|
int64_t kMaxPacketDurationMs = kRttMs *
|
|
RtpPacketHistory::kMinPacketDurationRtt *
|
|
RtpPacketHistory::kPacketCullingDelayFactor;
|
|
fake_clock_.AdvanceTimeMilliseconds(kMaxPacketDurationMs - 1);
|
|
|
|
// First packet should still be there.
|
|
EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum));
|
|
|
|
// Advance to where packet can be culled, even if buffer is not full.
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + 1)),
|
|
fake_clock_.TimeInMilliseconds());
|
|
|
|
EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum));
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, CullWithAcks) {
|
|
const int64_t kPacketLifetime = RtpPacketHistory::kMinPacketDurationMs *
|
|
RtpPacketHistory::kPacketCullingDelayFactor;
|
|
|
|
const int64_t start_time = fake_clock_.TimeInMilliseconds();
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
|
|
|
|
// Insert three packets 33ms apart, immediately mark them as sent.
|
|
std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
|
|
packet->SetPayloadSize(50);
|
|
hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
|
|
hist_.GetPacketAndSetSendTime(kStartSeqNum);
|
|
fake_clock_.AdvanceTimeMilliseconds(33);
|
|
packet = CreateRtpPacket(To16u(kStartSeqNum + 1));
|
|
packet->SetPayloadSize(50);
|
|
hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
|
|
hist_.GetPacketAndSetSendTime(To16u(kStartSeqNum + 1));
|
|
fake_clock_.AdvanceTimeMilliseconds(33);
|
|
packet = CreateRtpPacket(To16u(kStartSeqNum + 2));
|
|
packet->SetPayloadSize(50);
|
|
hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
|
|
hist_.GetPacketAndSetSendTime(To16u(kStartSeqNum + 2));
|
|
|
|
EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum).has_value());
|
|
EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 1)).has_value());
|
|
EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 2)).has_value());
|
|
|
|
// Remove middle one using ack, check that only that one is gone.
|
|
std::vector<uint16_t> acked_sequence_numbers = {To16u(kStartSeqNum + 1)};
|
|
hist_.CullAcknowledgedPackets(acked_sequence_numbers);
|
|
|
|
EXPECT_TRUE(hist_.GetPacketState(kStartSeqNum).has_value());
|
|
EXPECT_FALSE(hist_.GetPacketState(To16u(kStartSeqNum + 1)).has_value());
|
|
EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 2)).has_value());
|
|
|
|
// Advance time to where second packet would have expired, verify first packet
|
|
// is removed.
|
|
int64_t second_packet_expiry_time = start_time + kPacketLifetime + 33 + 1;
|
|
fake_clock_.AdvanceTimeMilliseconds(second_packet_expiry_time -
|
|
fake_clock_.TimeInMilliseconds());
|
|
hist_.SetRtt(1); // Trigger culling of old packets.
|
|
EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum).has_value());
|
|
EXPECT_FALSE(hist_.GetPacketState(To16u(kStartSeqNum + 1)).has_value());
|
|
EXPECT_TRUE(hist_.GetPacketState(To16u(kStartSeqNum + 2)).has_value());
|
|
|
|
// Advance to where last packet expires, verify all gone.
|
|
fake_clock_.AdvanceTimeMilliseconds(33);
|
|
hist_.SetRtt(1); // Trigger culling of old packets.
|
|
EXPECT_FALSE(hist_.GetPacketState(kStartSeqNum).has_value());
|
|
EXPECT_FALSE(hist_.GetPacketState(To16u(kStartSeqNum + 1)).has_value());
|
|
EXPECT_FALSE(hist_.GetPacketState(To16u(kStartSeqNum + 2)).has_value());
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, SetsPendingTransmissionState) {
|
|
const int64_t kRttMs = RtpPacketHistory::kMinPacketDurationMs * 2;
|
|
hist_.SetRtt(kRttMs);
|
|
|
|
// Set size to remove old packets as soon as possible.
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
// Add a packet, without send time, indicating it's in pacer queue.
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
/* send_time_ms = */ absl::nullopt);
|
|
|
|
// Packet is pending transmission.
|
|
absl::optional<RtpPacketHistory::PacketState> packet_state =
|
|
hist_.GetPacketState(kStartSeqNum);
|
|
ASSERT_TRUE(packet_state.has_value());
|
|
EXPECT_TRUE(packet_state->pending_transmission);
|
|
|
|
// Packet sent, state should be back to non-pending.
|
|
EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
|
|
packet_state = hist_.GetPacketState(kStartSeqNum);
|
|
ASSERT_TRUE(packet_state.has_value());
|
|
EXPECT_FALSE(packet_state->pending_transmission);
|
|
|
|
// Time for a retransmission.
|
|
fake_clock_.AdvanceTimeMilliseconds(kRttMs);
|
|
EXPECT_TRUE(hist_.SetPendingTransmission(kStartSeqNum));
|
|
packet_state = hist_.GetPacketState(kStartSeqNum);
|
|
ASSERT_TRUE(packet_state.has_value());
|
|
EXPECT_TRUE(packet_state->pending_transmission);
|
|
|
|
// Packet sent.
|
|
EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
|
|
// Too early for retransmission.
|
|
ASSERT_FALSE(hist_.GetPacketState(kStartSeqNum).has_value());
|
|
|
|
// Retransmission allowed again, it's not in a pending state.
|
|
fake_clock_.AdvanceTimeMilliseconds(kRttMs);
|
|
packet_state = hist_.GetPacketState(kStartSeqNum);
|
|
ASSERT_TRUE(packet_state.has_value());
|
|
EXPECT_FALSE(packet_state->pending_transmission);
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, GetPacketAndSetSent) {
|
|
const int64_t kRttMs = RtpPacketHistory::kMinPacketDurationMs * 2;
|
|
hist_.SetRtt(kRttMs);
|
|
|
|
// Set size to remove old packets as soon as possible.
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
// Add a sent packet to the history.
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMicroseconds());
|
|
|
|
// Retransmission request, first retransmission is allowed immediately.
|
|
EXPECT_TRUE(hist_.GetPacketAndMarkAsPending(kStartSeqNum));
|
|
|
|
// Packet not yet sent, new retransmission not allowed.
|
|
fake_clock_.AdvanceTimeMilliseconds(kRttMs);
|
|
EXPECT_FALSE(hist_.GetPacketAndMarkAsPending(kStartSeqNum));
|
|
|
|
// Mark as sent, but too early for retransmission.
|
|
hist_.MarkPacketAsSent(kStartSeqNum);
|
|
EXPECT_FALSE(hist_.GetPacketAndMarkAsPending(kStartSeqNum));
|
|
|
|
// Enough time has passed, retransmission is allowed again.
|
|
fake_clock_.AdvanceTimeMilliseconds(kRttMs);
|
|
EXPECT_TRUE(hist_.GetPacketAndMarkAsPending(kStartSeqNum));
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, GetPacketWithEncapsulation) {
|
|
const uint32_t kSsrc = 92384762;
|
|
const int64_t kRttMs = RtpPacketHistory::kMinPacketDurationMs * 2;
|
|
hist_.SetRtt(kRttMs);
|
|
|
|
// Set size to remove old packets as soon as possible.
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
// Add a sent packet to the history, with a set SSRC.
|
|
std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(kStartSeqNum);
|
|
packet->SetSsrc(kSsrc);
|
|
hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMicroseconds());
|
|
|
|
// Retransmission request, simulate an RTX-like encapsulation, were the packet
|
|
// is sent on a different SSRC.
|
|
std::unique_ptr<RtpPacketToSend> retransmit_packet =
|
|
hist_.GetPacketAndMarkAsPending(
|
|
kStartSeqNum, [](const RtpPacketToSend& packet) {
|
|
auto encapsulated_packet =
|
|
std::make_unique<RtpPacketToSend>(packet);
|
|
encapsulated_packet->SetSsrc(packet.Ssrc() + 1);
|
|
return encapsulated_packet;
|
|
});
|
|
ASSERT_TRUE(retransmit_packet);
|
|
EXPECT_EQ(retransmit_packet->Ssrc(), kSsrc + 1);
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, GetPacketWithEncapsulationAbortOnNullptr) {
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMicroseconds());
|
|
|
|
// Retransmission request, but the encapsulator determines that this packet is
|
|
// not suitable for retransmission (bandwidth exhausted?) so the retransmit is
|
|
// aborted and the packet is not marked as pending.
|
|
EXPECT_FALSE(hist_.GetPacketAndMarkAsPending(
|
|
kStartSeqNum, [](const RtpPacketToSend&) { return nullptr; }));
|
|
|
|
// New try, this time getting the packet should work, and it should not be
|
|
// blocked due to any pending status.
|
|
EXPECT_TRUE(hist_.GetPacketAndMarkAsPending(kStartSeqNum));
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, DontRemovePendingTransmissions) {
|
|
const int64_t kRttMs = RtpPacketHistory::kMinPacketDurationMs * 2;
|
|
const int64_t kPacketTimeoutMs =
|
|
kRttMs * RtpPacketHistory::kMinPacketDurationRtt;
|
|
|
|
// Set size to remove old packets as soon as possible.
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
hist_.SetRtt(kRttMs);
|
|
|
|
// Add a sent packet.
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
|
|
// Advance clock to just before packet timeout.
|
|
fake_clock_.AdvanceTimeMilliseconds(kPacketTimeoutMs - 1);
|
|
// Mark as enqueued in pacer.
|
|
EXPECT_TRUE(hist_.SetPendingTransmission(kStartSeqNum));
|
|
|
|
// Advance clock to where packet would have timed out. It should still
|
|
// be there and pending.
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
absl::optional<RtpPacketHistory::PacketState> packet_state =
|
|
hist_.GetPacketState(kStartSeqNum);
|
|
ASSERT_TRUE(packet_state.has_value());
|
|
EXPECT_TRUE(packet_state->pending_transmission);
|
|
|
|
// Packet sent. Now it can be removed.
|
|
EXPECT_TRUE(hist_.GetPacketAndSetSendTime(kStartSeqNum));
|
|
hist_.SetRtt(kRttMs); // Force culling of old packets.
|
|
packet_state = hist_.GetPacketState(kStartSeqNum);
|
|
ASSERT_FALSE(packet_state.has_value());
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, PrioritizedPayloadPadding) {
|
|
if (!GetParam()) {
|
|
// Padding prioritization is off, ignore this test.
|
|
return;
|
|
}
|
|
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
// Add two sent packets, one millisecond apart.
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum + 1),
|
|
fake_clock_.TimeInMilliseconds());
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
|
|
// Latest packet given equal retransmission count.
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
kStartSeqNum + 1);
|
|
|
|
// Older packet has lower retransmission count.
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(), kStartSeqNum);
|
|
|
|
// Equal retransmission count again, use newest packet.
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
kStartSeqNum + 1);
|
|
|
|
// Older packet has lower retransmission count.
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(), kStartSeqNum);
|
|
|
|
// Remove newest packet.
|
|
hist_.CullAcknowledgedPackets(std::vector<uint16_t>{kStartSeqNum + 1});
|
|
|
|
// Only older packet left.
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(), kStartSeqNum);
|
|
|
|
hist_.CullAcknowledgedPackets(std::vector<uint16_t>{kStartSeqNum});
|
|
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket(), nullptr);
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, NoPendingPacketAsPadding) {
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(), kStartSeqNum);
|
|
|
|
// If packet is pending retransmission, don't try to use it as padding.
|
|
hist_.SetPendingTransmission(kStartSeqNum);
|
|
EXPECT_EQ(nullptr, hist_.GetPayloadPaddingPacket());
|
|
|
|
// Market it as no longer pending, should be usable as padding again.
|
|
hist_.GetPacketAndSetSendTime(kStartSeqNum);
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(), kStartSeqNum);
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, PayloadPaddingWithEncapsulation) {
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 1);
|
|
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
|
|
// Aborted padding.
|
|
EXPECT_EQ(nullptr, hist_.GetPayloadPaddingPacket(
|
|
[](const RtpPacketToSend&) { return nullptr; }));
|
|
|
|
// Get copy of packet, but with sequence number modified.
|
|
auto padding_packet =
|
|
hist_.GetPayloadPaddingPacket([&](const RtpPacketToSend& packet) {
|
|
auto encapsulated_packet = std::make_unique<RtpPacketToSend>(packet);
|
|
encapsulated_packet->SetSequenceNumber(kStartSeqNum + 1);
|
|
return encapsulated_packet;
|
|
});
|
|
ASSERT_TRUE(padding_packet);
|
|
EXPECT_EQ(padding_packet->SequenceNumber(), kStartSeqNum + 1);
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, NackAfterAckIsNoop) {
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 2);
|
|
// Add two sent packets.
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum),
|
|
fake_clock_.TimeInMilliseconds());
|
|
hist_.PutRtpPacket(CreateRtpPacket(kStartSeqNum + 1),
|
|
fake_clock_.TimeInMilliseconds());
|
|
// Remove newest one.
|
|
hist_.CullAcknowledgedPackets(std::vector<uint16_t>{kStartSeqNum + 1});
|
|
// Retransmission request for already acked packet, should be noop.
|
|
auto packet = hist_.GetPacketAndMarkAsPending(kStartSeqNum + 1);
|
|
EXPECT_EQ(packet.get(), nullptr);
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, OutOfOrderInsertRemoval) {
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, 10);
|
|
|
|
// Insert packets, out of order, including both forwards and backwards
|
|
// sequence number wraps.
|
|
const int seq_offsets[] = {0, 1, -1, 2, -2, 3, -3};
|
|
const int64_t start_time_ms = fake_clock_.TimeInMilliseconds();
|
|
|
|
for (int offset : seq_offsets) {
|
|
uint16_t seq_no = To16u(kStartSeqNum + offset);
|
|
std::unique_ptr<RtpPacketToSend> packet = CreateRtpPacket(seq_no);
|
|
packet->SetPayloadSize(50);
|
|
hist_.PutRtpPacket(std::move(packet), fake_clock_.TimeInMilliseconds());
|
|
hist_.GetPacketAndSetSendTime(seq_no);
|
|
fake_clock_.AdvanceTimeMilliseconds(33);
|
|
}
|
|
|
|
// Check packet are there and remove them in the same out-of-order fashion.
|
|
int64_t expected_time_offset_ms = 0;
|
|
for (int offset : seq_offsets) {
|
|
uint16_t seq_no = To16u(kStartSeqNum + offset);
|
|
absl::optional<RtpPacketHistory::PacketState> packet_state =
|
|
hist_.GetPacketState(seq_no);
|
|
ASSERT_TRUE(packet_state.has_value());
|
|
EXPECT_EQ(packet_state->send_time_ms,
|
|
start_time_ms + expected_time_offset_ms);
|
|
std::vector<uint16_t> acked_sequence_numbers = {seq_no};
|
|
hist_.CullAcknowledgedPackets(acked_sequence_numbers);
|
|
expected_time_offset_ms += 33;
|
|
}
|
|
}
|
|
|
|
TEST_P(RtpPacketHistoryTest, UsesLastPacketAsPaddingWithPrioOff) {
|
|
if (GetParam()) {
|
|
// Padding prioritization is enabled, ignore this test.
|
|
return;
|
|
}
|
|
|
|
const size_t kHistorySize = 10;
|
|
hist_.SetStorePacketsStatus(StorageMode::kStoreAndCull, kHistorySize);
|
|
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket(), nullptr);
|
|
|
|
for (size_t i = 0; i < kHistorySize; ++i) {
|
|
hist_.PutRtpPacket(CreateRtpPacket(To16u(kStartSeqNum + i)),
|
|
fake_clock_.TimeInMilliseconds());
|
|
hist_.MarkPacketAsSent(To16u(kStartSeqNum + i));
|
|
fake_clock_.AdvanceTimeMilliseconds(1);
|
|
|
|
// Last packet always returned.
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
To16u(kStartSeqNum + i));
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
To16u(kStartSeqNum + i));
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
To16u(kStartSeqNum + i));
|
|
}
|
|
|
|
// Remove packets from the end, last in the list should be returned.
|
|
for (size_t i = kHistorySize - 1; i > 0; --i) {
|
|
hist_.CullAcknowledgedPackets(
|
|
std::vector<uint16_t>{To16u(kStartSeqNum + i)});
|
|
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
To16u(kStartSeqNum + i - 1));
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
To16u(kStartSeqNum + i - 1));
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket()->SequenceNumber(),
|
|
To16u(kStartSeqNum + i - 1));
|
|
}
|
|
|
|
hist_.CullAcknowledgedPackets(std::vector<uint16_t>{kStartSeqNum});
|
|
EXPECT_EQ(hist_.GetPayloadPaddingPacket(), nullptr);
|
|
}
|
|
|
|
INSTANTIATE_TEST_SUITE_P(WithAndWithoutPaddingPrio,
|
|
RtpPacketHistoryTest,
|
|
::testing::Bool());
|
|
} // namespace webrtc
|