[rtp_rtcp] ReportBlockInformation cleaned and moved out of the rtcp_receiver_help.

webrtc/modules/rtp_rtcp/source/report_block_information_unittest.cc

+/*
+ *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include <algorithm>
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/base/random.h"
+#include "webrtc/modules/rtp_rtcp/source/report_block_information.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/report_block.h"
+#include "webrtc/modules/rtp_rtcp/source/rtcp_utility.h"
+#include "webrtc/modules/rtp_rtcp/source/time_util.h"
+
+using webrtc::rtcp::ReportBlock;
+using webrtc::rtcp::ReportBlockInformation;
+using webrtc::RTCPUtility::RTCPPacketReportBlockItem;
+
+namespace webrtc {
+
+class RtcpReportBlockInformationTest : public ::testing::Test {
+ protected:
+  Random rand_;
+  const uint32_t kSourceSsrc;
+  const uint32_t kRemoteSsrc;
+  const uint32_t kDelayNtp;
+  const uint8_t kFractionLost;
+  const uint32_t kCumulativeLost;
+  const uint32_t kSequenceNumber;
+  const uint32_t kJitter;
+  const uint32_t kLastSr;
+  RtcpReportBlockInformationTest()
+      : rand_(0x123456789abcdef),
+        kSourceSsrc(RandSsrc()),
+        kRemoteSsrc(RandSsrc()),
+        kDelayNtp(Rand<uint32_t>()),
+        kFractionLost(Rand<uint8_t>()),
+        kCumulativeLost(Rand((1 << 24) - 1)),
+        kSequenceNumber(Rand<uint32_t>()),
+        kJitter(Rand<uint32_t>()),
+        kLastSr(Rand<uint32_t>()) {}
+
+  uint32_t RandSsrc() { return rand_.Rand(0x00000001u, 0xfffffffeu); }
+  template <typename T>
+  T Rand() {
+    return rand_.Rand<T>();
+  }
+  uint32_t Rand(uint32_t max) { return rand_.Rand(max); }
+  uint32_t Rand(uint32_t min, uint32_t max) { return rand_.Rand(min, max); }
+};
+
+template <>
+NtpTime RtcpReportBlockInformationTest::Rand<NtpTime>() {
+  return NtpTime(Rand<uint32_t>(), Rand<uint32_t>());
+}
+
+TEST_F(RtcpReportBlockInformationTest, RemembersLastReportBlock) {
+  ReportBlockInformation rbi;
+  const NtpTime kNow = Rand<NtpTime>();
+  ReportBlock b;
+  b.To(kSourceSsrc);
+  b.WithFractionLost(kFractionLost);
+  b.WithCumulativeLost(kCumulativeLost);
+  b.WithExtHighestSeqNum(kSequenceNumber);
+  b.WithJitter(kJitter);
+  b.WithLastSr(kLastSr);
+  b.WithDelayLastSr(kDelayNtp);
+
+  rbi.AddBlock(b, kRemoteSsrc, kNow);
+
+  EXPECT_EQ(kSourceSsrc, rbi.LastBlock().sourceSSRC);
+  EXPECT_EQ(kRemoteSsrc, rbi.LastBlock().remoteSSRC);
+  EXPECT_EQ(kFractionLost, rbi.LastBlock().fractionLost);
+  EXPECT_EQ(kCumulativeLost, rbi.LastBlock().cumulativeLost);
+  EXPECT_EQ(kSequenceNumber, rbi.LastBlock().extendedHighSeqNum);
+  EXPECT_EQ(kJitter, rbi.LastBlock().jitter);
+  EXPECT_EQ(kLastSr, rbi.LastBlock().lastSR);
+  EXPECT_EQ(kDelayNtp, rbi.LastBlock().delaySinceLastSR);
+}
+
+TEST_F(RtcpReportBlockInformationTest, AcceptsRTCPUtilityReportBlockItem) {
+  ReportBlockInformation rbi;
+  const NtpTime kNow = Rand<NtpTime>();
+  RTCPPacketReportBlockItem b;
+  b.SSRC = kSourceSsrc;
+  b.FractionLost = kFractionLost;
+  b.CumulativeNumOfPacketsLost = kCumulativeLost;
+  b.ExtendedHighestSequenceNumber = kSequenceNumber;
+  b.Jitter = kJitter;
+  b.LastSR = kLastSr;
+  b.DelayLastSR = kDelayNtp;
+
+  rbi.AddBlock(b, kRemoteSsrc, kNow);
+
+  EXPECT_EQ(kSourceSsrc, rbi.LastBlock().sourceSSRC);
+  EXPECT_EQ(kRemoteSsrc, rbi.LastBlock().remoteSSRC);
+  EXPECT_EQ(kFractionLost, rbi.LastBlock().fractionLost);
+  EXPECT_EQ(kCumulativeLost, rbi.LastBlock().cumulativeLost);
+  EXPECT_EQ(kSequenceNumber, rbi.LastBlock().extendedHighSeqNum);
+  EXPECT_EQ(kJitter, rbi.LastBlock().jitter);
+  EXPECT_EQ(kLastSr, rbi.LastBlock().lastSR);
+  EXPECT_EQ(kDelayNtp, rbi.LastBlock().delaySinceLastSR);
+}
+
+TEST_F(RtcpReportBlockInformationTest, ReportBlockWithoutRTT) {
+  ReportBlockInformation rbi;
+  const NtpTime kNow = Rand<NtpTime>();
+  ReportBlock b;
+  b.To(kSourceSsrc);
+  b.WithLastSr(0);  // LastSR = 0 means RTT can't be calculated.
+
+  rbi.AddBlock(b, kRemoteSsrc, kNow);
+
+  EXPECT_FALSE(rbi.HasRtt());
+  EXPECT_EQ(kSourceSsrc, rbi.LastBlock().sourceSSRC);
+  EXPECT_EQ(kRemoteSsrc, rbi.LastBlock().remoteSSRC);
+}
+
+TEST_F(RtcpReportBlockInformationTest, ReportBlockWithRTT) {
+  const uint32_t kRttMs = Rand(1, 18 * 3600 * 1000);
+  ReportBlockInformation rbi;
+  SimulatedClock clock(Rand<uint32_t>());
+  ReportBlock b;
+  b.To(kSourceSsrc);
+  NtpTime start(clock);
+  b.WithLastSr(CompactNtp(start));
+  b.WithDelayLastSr(kDelayNtp);
+  clock.AdvanceTimeMilliseconds(kRttMs + CompactNtpIntervalToMs(kDelayNtp));
+  NtpTime now(clock);
+
+  rbi.AddBlock(b, kRemoteSsrc, now);
+
+  EXPECT_TRUE(rbi.HasRtt());
+  EXPECT_NEAR(kRttMs, rbi.LastRttMs(), 1);
+}
+
+TEST_F(RtcpReportBlockInformationTest, RTTStats) {
+  const uint32_t kRttMs1 = Rand(1, 18 * 3600 * 1000);
+  const uint32_t kRttMs2 = Rand(1, 18 * 3600 * 1000);
+  const uint32_t kRttMs3 = Rand(1, 18 * 3600 * 1000);
+  const uint32_t kRttMin = std::min({kRttMs1, kRttMs2, kRttMs3});
+  const uint32_t kRttMax = std::max({kRttMs1, kRttMs2, kRttMs3});
+  const uint32_t kRttAvg = (kRttMs1 + kRttMs2 + kRttMs3) / 3;
+  const uint32_t kDelayMs = CompactNtpIntervalToMs(kDelayNtp);
+  ReportBlockInformation rbi;
+  SimulatedClock clock(Rand<uint32_t>());
+  ReportBlock b;
+  b.To(kSourceSsrc);
+  const NtpTime start(clock);
+  b.WithDelayLastSr(kDelayNtp);
+
+  b.WithLastSr(CompactNtp(start));
+  clock.AdvanceTimeMilliseconds(kRttMs1 + kDelayMs);
+  const NtpTime time1(clock);
+  rbi.AddBlock(b, kRemoteSsrc, time1);
+
+  b.WithLastSr(CompactNtp(time1));
+  clock.AdvanceTimeMilliseconds(kRttMs2 + kDelayMs);
+  const NtpTime time2(clock);
+  rbi.AddBlock(b, kRemoteSsrc, time2);
+
+  b.WithLastSr(CompactNtp(time2));
+  clock.AdvanceTimeMilliseconds(kRttMs3 + kDelayMs);
+  const NtpTime time3(clock);
+  rbi.AddBlock(b, kRemoteSsrc, time3);
+
+  EXPECT_TRUE(rbi.HasRtt());
+  EXPECT_NEAR(kRttMs3, rbi.LastRttMs(), 1);
+  EXPECT_NEAR(kRttMin, rbi.MinRttMs(), 1);
+  EXPECT_NEAR(kRttMax, rbi.MaxRttMs(), 1);
+  EXPECT_NEAR(kRttAvg, rbi.AvgRttMs(), 1);
+}
+
+}  // namespace webrtc