1227e8b345
RTP timestams helper functions moved from rtp_utility added functions to deal with CompactNtp timestamps R=åsapersson BUG=webrtc:5260 Review URL: https://codereview.webrtc.org/1535113002 Cr-Commit-Position: refs/heads/master@{#11106}
63 lines
2.1 KiB
C++
63 lines
2.1 KiB
C++
/*
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* Copyright (c) 2015 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 "webrtc/modules/rtp_rtcp/source/time_util.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace webrtc {
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TEST(TimeUtilTest, CompactNtp) {
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const uint32_t kNtpSec = 0x12345678;
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const uint32_t kNtpFrac = 0x23456789;
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const NtpTime kNtp(kNtpSec, kNtpFrac);
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const uint32_t kNtpMid = 0x56782345;
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EXPECT_EQ(kNtpMid, CompactNtp(kNtp));
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}
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TEST(TimeUtilTest, CompactNtpToMs) {
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const NtpTime ntp1(0x12345, 0x23456);
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const NtpTime ntp2(0x12654, 0x64335);
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uint32_t ms_diff = ntp2.ToMs() - ntp1.ToMs();
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uint32_t ntp_diff = CompactNtp(ntp2) - CompactNtp(ntp1);
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uint32_t ntp_to_ms_diff = CompactNtpIntervalToMs(ntp_diff);
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EXPECT_NEAR(ms_diff, ntp_to_ms_diff, 1);
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}
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TEST(TimeUtilTest, CompactNtpToMsWithWrap) {
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const NtpTime ntp1(0x1ffff, 0x23456);
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const NtpTime ntp2(0x20000, 0x64335);
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uint32_t ms_diff = ntp2.ToMs() - ntp1.ToMs();
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// While ntp2 > ntp1, there compact ntp presentation happen to be opposite.
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// That shouldn't be a problem as long as unsigned arithmetic is used.
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ASSERT_GT(ntp2.ToMs(), ntp1.ToMs());
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ASSERT_LT(CompactNtp(ntp2), CompactNtp(ntp1));
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uint32_t ntp_diff = CompactNtp(ntp2) - CompactNtp(ntp1);
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uint32_t ntp_to_ms_diff = CompactNtpIntervalToMs(ntp_diff);
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EXPECT_NEAR(ms_diff, ntp_to_ms_diff, 1);
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}
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TEST(TimeUtilTest, CompactNtpToMsLarge) {
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const NtpTime ntp1(0x10000, 0x23456);
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const NtpTime ntp2(0x1ffff, 0x64335);
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uint32_t ms_diff = ntp2.ToMs() - ntp1.ToMs();
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// Ntp difference close to maximum of ~18 hours should convert correctly too.
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ASSERT_GT(ms_diff, 18u * 3600 * 1000);
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uint32_t ntp_diff = CompactNtp(ntp2) - CompactNtp(ntp1);
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uint32_t ntp_to_ms_diff = CompactNtpIntervalToMs(ntp_diff);
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EXPECT_NEAR(ms_diff, ntp_to_ms_diff, 1);
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}
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} // namespace webrtc
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