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webrtc/system_wrappers/source/rtp_to_ntp_estimator_unittest.cc
Mirko Bonadei bb547203bf Moving src/webrtc into src/. 
In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}
2017-09-15 04:25:06 +00:00

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/*
* Copyright (c) 2012 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 "webrtc/system_wrappers/include/rtp_to_ntp_estimator.h"
#include "webrtc/test/gtest.h"
namespace webrtc {
namespace {
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
} // namespace
TEST(WrapAroundTests, NoWrap) {
EXPECT_EQ(0, CheckForWrapArounds(0xFFFFFFFF, 0xFFFFFFFE));
EXPECT_EQ(0, CheckForWrapArounds(1, 0));
EXPECT_EQ(0, CheckForWrapArounds(0x00010000, 0x0000FFFF));
}
TEST(WrapAroundTests, ForwardWrap) {
EXPECT_EQ(1, CheckForWrapArounds(0, 0xFFFFFFFF));
EXPECT_EQ(1, CheckForWrapArounds(0, 0xFFFF0000));
EXPECT_EQ(1, CheckForWrapArounds(0x0000FFFF, 0xFFFFFFFF));
EXPECT_EQ(1, CheckForWrapArounds(0x0000FFFF, 0xFFFF0000));
}
TEST(WrapAroundTests, BackwardWrap) {
EXPECT_EQ(-1, CheckForWrapArounds(0xFFFFFFFF, 0));
EXPECT_EQ(-1, CheckForWrapArounds(0xFFFF0000, 0));
EXPECT_EQ(-1, CheckForWrapArounds(0xFFFFFFFF, 0x0000FFFF));
EXPECT_EQ(-1, CheckForWrapArounds(0xFFFF0000, 0x0000FFFF));
}
TEST(WrapAroundTests, OldRtcpWrapped_OldRtpTimestamp) {
RtpToNtpEstimator estimator;
bool new_sr;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 1;
uint32_t timestamp = 0;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
// Expected to fail since the older RTCP has a smaller RTP timestamp than the
// newer (old:0, new:4294967206).
EXPECT_FALSE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
}
TEST(WrapAroundTests, NewRtcpWrapped) {
RtpToNtpEstimator estimator;
bool new_sr;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 1;
uint32_t timestamp = 0xFFFFFFFF;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
int64_t timestamp_ms = -1;
EXPECT_TRUE(estimator.Estimate(0xFFFFFFFF, &timestamp_ms));
// Since this RTP packet has the same timestamp as the RTCP packet constructed
// at time 0 it should be mapped to 0 as well.
EXPECT_EQ(0, timestamp_ms);
}
TEST(WrapAroundTests, RtpWrapped) {
RtpToNtpEstimator estimator;
bool new_sr;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 1;
uint32_t timestamp = 0xFFFFFFFF - 2 * kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
int64_t timestamp_ms = -1;
EXPECT_TRUE(estimator.Estimate(0xFFFFFFFF - 2 * kTimestampTicksPerMs,
&timestamp_ms));
// Since this RTP packet has the same timestamp as the RTCP packet constructed
// at time 0 it should be mapped to 0 as well.
EXPECT_EQ(0, timestamp_ms);
// Two kTimestampTicksPerMs advanced.
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(estimator.Estimate(timestamp, &timestamp_ms));
EXPECT_EQ(2, timestamp_ms);
// Wrapped rtp.
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(estimator.Estimate(timestamp, &timestamp_ms));
EXPECT_EQ(3, timestamp_ms);
}
TEST(WrapAroundTests, OldRtp_RtcpsWrapped) {
RtpToNtpEstimator estimator;
bool new_sr;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 1;
uint32_t timestamp = 0;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
timestamp -= 2 * kTimestampTicksPerMs;
int64_t timestamp_ms = -1;
EXPECT_FALSE(estimator.Estimate(timestamp, &timestamp_ms));
}
TEST(WrapAroundTests, OldRtp_NewRtcpWrapped) {
RtpToNtpEstimator estimator;
bool new_sr;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 1;
uint32_t timestamp = 0xFFFFFFFF;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
timestamp -= kTimestampTicksPerMs;
int64_t timestamp_ms = -1;
EXPECT_TRUE(estimator.Estimate(timestamp, &timestamp_ms));
// Constructed at the same time as the first RTCP and should therefore be
// mapped to zero.
EXPECT_EQ(0, timestamp_ms);
}
TEST(WrapAroundTests, GracefullyHandleRtpJump) {
RtpToNtpEstimator estimator;
bool new_sr;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 1;
uint32_t timestamp = 0;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
int64_t timestamp_ms = -1;
EXPECT_TRUE(estimator.Estimate(timestamp, &timestamp_ms));
// Constructed at the same time as the first RTCP and should therefore be
// mapped to zero.
EXPECT_EQ(0, timestamp_ms);
timestamp -= 0xFFFFF;
for (int i = 0; i < RtpToNtpEstimator::kMaxInvalidSamples - 1; ++i) {
EXPECT_FALSE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
}
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
timestamp_ms = -1;
EXPECT_TRUE(estimator.Estimate(timestamp, &timestamp_ms));
// 6 milliseconds has passed since the start of the test.
EXPECT_EQ(6, timestamp_ms);
}
TEST(UpdateRtcpMeasurementTests, FailsForZeroNtp) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_FALSE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_FALSE(new_sr);
}
TEST(UpdateRtcpMeasurementTests, FailsForEqualNtp) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 699925050;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(new_sr);
// Ntp time already added, list not updated.
++timestamp;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_FALSE(new_sr);
}
TEST(UpdateRtcpMeasurementTests, FailsForOldNtp) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 1;
uint32_t ntp_frac = 699925050;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(new_sr);
// Old ntp time, list not updated.
ntp_frac -= kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_FALSE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
}
TEST(UpdateRtcpMeasurementTests, FailsForEqualTimestamp) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 2;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(new_sr);
// Timestamp already added, list not updated.
++ntp_frac;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_FALSE(new_sr);
}
TEST(UpdateRtcpMeasurementTests, FailsForOldRtpTimestamp) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 2;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(new_sr);
// Old timestamp, list not updated.
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
EXPECT_FALSE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_FALSE(new_sr);
}
TEST(UpdateRtcpMeasurementTests, VerifyParameters) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 1;
uint32_t ntp_frac = 2;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(new_sr);
EXPECT_FALSE(estimator.params().calculated);
// Add second report, parameters should be calculated.
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(estimator.params().calculated);
EXPECT_DOUBLE_EQ(90.0, estimator.params().frequency_khz);
EXPECT_NE(0.0, estimator.params().offset_ms);
}
TEST(RtpToNtpTests, FailsForNoParameters) {
RtpToNtpEstimator estimator;
uint32_t ntp_sec = 1;
uint32_t ntp_frac = 2;
uint32_t timestamp = 0x12345678;
bool new_sr;
EXPECT_TRUE(
estimator.UpdateMeasurements(ntp_sec, ntp_frac, timestamp, &new_sr));
EXPECT_TRUE(new_sr);
// Parameters are not calculated, conversion of RTP to NTP time should fail.
EXPECT_FALSE(estimator.params().calculated);
int64_t timestamp_ms = -1;
EXPECT_FALSE(estimator.Estimate(timestamp, &timestamp_ms));
}
}; // namespace webrtc
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