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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include <gtest/gtest.h> | |
| 6 | |
| 7 #include <stdint.h> | |
| 8 | |
| 9 #include "base/test/simple_test_tick_clock.h" | |
| 10 #include "base/time/time.h" | |
| 11 #include "media/cast/rtp_receiver/receiver_stats.h" | |
| 12 #include "media/cast/rtp_receiver/rtp_receiver_defines.h" | |
| 13 | |
| 14 namespace media { | |
| 15 namespace cast { | |
| 16 | |
| 17 static const int64 kStartMillisecond = INT64_C(12345678900000); | |
| 18 static const uint32 kStdTimeIncrementMs = 33; | |
| 19 | |
| 20 class ReceiverStatsTest : public ::testing::Test { | |
| 21 protected: | |
| 22 ReceiverStatsTest() | |
| 23 : stats_(&testing_clock_), | |
| 24 fraction_lost_(0), | |
| 25 cumulative_lost_(0), | |
| 26 extended_high_sequence_number_(0), | |
| 27 jitter_(0) { | |
| 28 testing_clock_.Advance( | |
| 29 base::TimeDelta::FromMilliseconds(kStartMillisecond)); | |
| 30 start_time_ = testing_clock_.NowTicks(); | |
| 31 delta_increments_ = base::TimeDelta::FromMilliseconds(kStdTimeIncrementMs); | |
| 32 } | |
| 33 virtual ~ReceiverStatsTest() {} | |
| 34 | |
| 35 uint32 ExpectedJitter(uint32 const_interval, int num_packets) { | |
| 36 float jitter = 0; | |
| 37 // Assume timestamps have a constant kStdTimeIncrementMs interval. | |
| 38 float float_interval = | |
| 39 static_cast<float>(const_interval - kStdTimeIncrementMs); | |
| 40 for (int i = 0; i < num_packets; ++i) { | |
| 41 jitter += (float_interval - jitter) / 16; | |
| 42 } | |
| 43 return static_cast<uint32>(jitter + 0.5f); | |
| 44 } | |
| 45 | |
| 46 ReceiverStats stats_; | |
| 47 RtpCastHeader rtp_header_; | |
| 48 uint8 fraction_lost_; | |
| 49 uint32 cumulative_lost_; | |
| 50 uint32 extended_high_sequence_number_; | |
| 51 uint32 jitter_; | |
| 52 base::SimpleTestTickClock testing_clock_; | |
| 53 base::TimeTicks start_time_; | |
| 54 base::TimeDelta delta_increments_; | |
| 55 | |
| 56 DISALLOW_COPY_AND_ASSIGN(ReceiverStatsTest); | |
| 57 }; | |
| 58 | |
| 59 TEST_F(ReceiverStatsTest, ResetState) { | |
| 60 stats_.GetStatistics(&fraction_lost_, | |
| 61 &cumulative_lost_, | |
| 62 &extended_high_sequence_number_, | |
| 63 &jitter_); | |
| 64 EXPECT_EQ(0u, fraction_lost_); | |
| 65 EXPECT_EQ(0u, cumulative_lost_); | |
| 66 EXPECT_EQ(0u, extended_high_sequence_number_); | |
| 67 EXPECT_EQ(0u, jitter_); | |
| 68 } | |
| 69 | |
| 70 TEST_F(ReceiverStatsTest, LossCount) { | |
| 71 for (int i = 0; i < 300; ++i) { | |
| 72 if (i % 4) | |
| 73 stats_.UpdateStatistics(rtp_header_); | |
| 74 if (i % 3) { | |
| 75 rtp_header_.rtp_timestamp += 33 * 90; | |
| 76 } | |
| 77 ++rtp_header_.sequence_number; | |
| 78 testing_clock_.Advance(delta_increments_); | |
| 79 } | |
| 80 stats_.GetStatistics(&fraction_lost_, | |
| 81 &cumulative_lost_, | |
| 82 &extended_high_sequence_number_, | |
| 83 &jitter_); | |
| 84 EXPECT_EQ(63u, fraction_lost_); | |
| 85 EXPECT_EQ(74u, cumulative_lost_); | |
| 86 // Build extended sequence number. | |
| 87 const uint32 extended_seq_num = rtp_header_.sequence_number - 1; | |
| 88 EXPECT_EQ(extended_seq_num, extended_high_sequence_number_); | |
| 89 } | |
| 90 | |
| 91 TEST_F(ReceiverStatsTest, NoLossWrap) { | |
| 92 rtp_header_.sequence_number = 65500; | |
| 93 for (int i = 0; i < 300; ++i) { | |
| 94 stats_.UpdateStatistics(rtp_header_); | |
| 95 if (i % 3) { | |
| 96 rtp_header_.rtp_timestamp += 33 * 90; | |
| 97 } | |
| 98 ++rtp_header_.sequence_number; | |
| 99 testing_clock_.Advance(delta_increments_); | |
| 100 } | |
| 101 stats_.GetStatistics(&fraction_lost_, | |
| 102 &cumulative_lost_, | |
| 103 &extended_high_sequence_number_, | |
| 104 &jitter_); | |
| 105 EXPECT_EQ(0u, fraction_lost_); | |
| 106 EXPECT_EQ(0u, cumulative_lost_); | |
| 107 // Build extended sequence number (one wrap cycle). | |
| 108 const uint32 extended_seq_num = (1 << 16) + rtp_header_.sequence_number - 1; | |
| 109 EXPECT_EQ(extended_seq_num, extended_high_sequence_number_); | |
| 110 } | |
| 111 | |
| 112 TEST_F(ReceiverStatsTest, LossCountWrap) { | |
| 113 const uint32 kStartSequenceNumber = 65500; | |
| 114 rtp_header_.sequence_number = kStartSequenceNumber; | |
| 115 for (int i = 0; i < 300; ++i) { | |
| 116 if (i % 4) | |
| 117 stats_.UpdateStatistics(rtp_header_); | |
| 118 if (i % 3) | |
| 119 // Update timestamp. | |
| 120 ++rtp_header_.rtp_timestamp; | |
| 121 ++rtp_header_.sequence_number; | |
| 122 testing_clock_.Advance(delta_increments_); | |
| 123 } | |
| 124 stats_.GetStatistics(&fraction_lost_, | |
| 125 &cumulative_lost_, | |
| 126 &extended_high_sequence_number_, | |
| 127 &jitter_); | |
| 128 EXPECT_EQ(63u, fraction_lost_); | |
| 129 EXPECT_EQ(74u, cumulative_lost_); | |
| 130 // Build extended sequence number (one wrap cycle). | |
| 131 const uint32 extended_seq_num = (1 << 16) + rtp_header_.sequence_number - 1; | |
| 132 EXPECT_EQ(extended_seq_num, extended_high_sequence_number_); | |
| 133 } | |
| 134 | |
| 135 TEST_F(ReceiverStatsTest, BasicJitter) { | |
| 136 for (int i = 0; i < 300; ++i) { | |
| 137 stats_.UpdateStatistics(rtp_header_); | |
| 138 ++rtp_header_.sequence_number; | |
| 139 rtp_header_.rtp_timestamp += 33 * 90; | |
| 140 testing_clock_.Advance(delta_increments_); | |
| 141 } | |
| 142 stats_.GetStatistics(&fraction_lost_, | |
| 143 &cumulative_lost_, | |
| 144 &extended_high_sequence_number_, | |
| 145 &jitter_); | |
| 146 EXPECT_FALSE(fraction_lost_); | |
| 147 EXPECT_FALSE(cumulative_lost_); | |
| 148 // Build extended sequence number (one wrap cycle). | |
| 149 const uint32 extended_seq_num = rtp_header_.sequence_number - 1; | |
| 150 EXPECT_EQ(extended_seq_num, extended_high_sequence_number_); | |
| 151 EXPECT_EQ(ExpectedJitter(kStdTimeIncrementMs, 300), jitter_); | |
| 152 } | |
| 153 | |
| 154 TEST_F(ReceiverStatsTest, NonTrivialJitter) { | |
| 155 const int kAdditionalIncrement = 5; | |
| 156 for (int i = 0; i < 300; ++i) { | |
| 157 stats_.UpdateStatistics(rtp_header_); | |
| 158 ++rtp_header_.sequence_number; | |
| 159 rtp_header_.rtp_timestamp += 33 * 90; | |
| 160 base::TimeDelta additional_delta = | |
| 161 base::TimeDelta::FromMilliseconds(kAdditionalIncrement); | |
| 162 testing_clock_.Advance(delta_increments_ + additional_delta); | |
| 163 } | |
| 164 stats_.GetStatistics(&fraction_lost_, | |
| 165 &cumulative_lost_, | |
| 166 &extended_high_sequence_number_, | |
| 167 &jitter_); | |
| 168 EXPECT_FALSE(fraction_lost_); | |
| 169 EXPECT_FALSE(cumulative_lost_); | |
| 170 // Build extended sequence number (one wrap cycle). | |
| 171 const uint32 extended_seq_num = rtp_header_.sequence_number - 1; | |
| 172 EXPECT_EQ(extended_seq_num, extended_high_sequence_number_); | |
| 173 EXPECT_EQ(ExpectedJitter(kStdTimeIncrementMs + kAdditionalIncrement, 300), | |
| 174 jitter_); | |
| 175 } | |
| 176 | |
| 177 } // namespace cast | |
| 178 } // namespace media | |
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Chromium Code Reviews
Issue 388663003:
Cast: Reshuffle files under media/cast (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src