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| 1 /* |
| 2 * Copyright (c) 2015 The WebRTC project authors. All Rights Reserved. |
| 3 * |
| 4 * Use of this source code is governed by a BSD-style license |
| 5 * that can be found in the LICENSE file in the root of the source |
| 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ |
| 10 #include "webrtc/modules/rtp_rtcp/source/time_util.h" |
| 11 |
| 12 #include "testing/gtest/include/gtest/gtest.h" |
| 13 |
| 14 namespace webrtc { |
| 15 |
| 16 TEST(TimeUtilTest, CompactNtp) { |
| 17 const uint32_t kNtpSec = 0x12345678; |
| 18 const uint32_t kNtpFrac = 0x23456789; |
| 19 const NtpTime kNtp(kNtpSec, kNtpFrac); |
| 20 const uint32_t kNtpMid = 0x56782345; |
| 21 EXPECT_EQ(kNtpMid, CompactNtp(kNtp)); |
| 22 } |
| 23 |
| 24 TEST(TimeUtilTest, CompactNtpToMs) { |
| 25 const NtpTime ntp1(0x12345, 0x23456); |
| 26 const NtpTime ntp2(0x12654, 0x64335); |
| 27 uint32_t ms_diff = ntp2.ToMs() - ntp1.ToMs(); |
| 28 uint32_t ntp_diff = CompactNtp(ntp2) - CompactNtp(ntp1); |
| 29 |
| 30 uint32_t ntp_to_ms_diff = CompactNtpIntervalToMs(ntp_diff); |
| 31 |
| 32 EXPECT_NEAR(ms_diff, ntp_to_ms_diff, 1); |
| 33 } |
| 34 |
| 35 TEST(TimeUtilTest, CompactNtpToMsWithWrap) { |
| 36 const NtpTime ntp1(0x1ffff, 0x23456); |
| 37 const NtpTime ntp2(0x20000, 0x64335); |
| 38 uint32_t ms_diff = ntp2.ToMs() - ntp1.ToMs(); |
| 39 |
| 40 // While ntp2 > ntp1, there compact ntp presentation happen to be opposite. |
| 41 // That shouldn't be a problem as long as unsigned arithmetic is used. |
| 42 ASSERT_GT(ntp2.ToMs(), ntp1.ToMs()); |
| 43 ASSERT_LT(CompactNtp(ntp2), CompactNtp(ntp1)); |
| 44 |
| 45 uint32_t ntp_diff = CompactNtp(ntp2) - CompactNtp(ntp1); |
| 46 uint32_t ntp_to_ms_diff = CompactNtpIntervalToMs(ntp_diff); |
| 47 |
| 48 EXPECT_NEAR(ms_diff, ntp_to_ms_diff, 1); |
| 49 } |
| 50 |
| 51 TEST(TimeUtilTest, CompactNtpToMsLarge) { |
| 52 const NtpTime ntp1(0x10000, 0x23456); |
| 53 const NtpTime ntp2(0x1ffff, 0x64335); |
| 54 uint32_t ms_diff = ntp2.ToMs() - ntp1.ToMs(); |
| 55 // Ntp difference close to maximum of ~18 hours should convert correctly too. |
| 56 ASSERT_GT(ms_diff, 18u * 3600 * 1000); |
| 57 uint32_t ntp_diff = CompactNtp(ntp2) - CompactNtp(ntp1); |
| 58 uint32_t ntp_to_ms_diff = CompactNtpIntervalToMs(ntp_diff); |
| 59 |
| 60 EXPECT_NEAR(ms_diff, ntp_to_ms_diff, 1); |
| 61 } |
| 62 } // namespace webrtc |
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