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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 "testing/gtest/include/gtest/gtest.h"
#include "webrtc/system_wrappers/interface/rtp_to_ntp.h"
namespace webrtc {
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) {
RtcpList rtcp;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0;
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
int64_t timestamp_in_ms = -1;
// This expected to fail since it's highly unlikely that the older RTCP
// has a much smaller RTP timestamp than the newer.
EXPECT_FALSE(RtpToNtpMs(timestamp, rtcp, ×tamp_in_ms));
}
TEST(WrapAroundTests, NewRtcpWrapped) {
RtcpList rtcp;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0xFFFFFFFF;
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
int64_t timestamp_in_ms = -1;
EXPECT_TRUE(RtpToNtpMs(rtcp.back().rtp_timestamp, rtcp, ×tamp_in_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_in_ms);
}
TEST(WrapAroundTests, RtpWrapped) {
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
RtcpList rtcp;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0xFFFFFFFF - 2 * kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
int64_t timestamp_in_ms = -1;
EXPECT_TRUE(RtpToNtpMs(timestamp, rtcp, ×tamp_in_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(2, timestamp_in_ms);
}
TEST(WrapAroundTests, OldRtp_RtcpsWrapped) {
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
RtcpList rtcp;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp -= 2*kTimestampTicksPerMs;
int64_t timestamp_in_ms = -1;
EXPECT_FALSE(RtpToNtpMs(timestamp, rtcp, ×tamp_in_ms));
}
TEST(WrapAroundTests, OldRtp_NewRtcpWrapped) {
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
RtcpList rtcp;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0xFFFFFFFF;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp += kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
int64_t timestamp_in_ms = -1;
EXPECT_TRUE(RtpToNtpMs(timestamp, rtcp, ×tamp_in_ms));
// Constructed at the same time as the first RTCP and should therefore be
// mapped to zero.
EXPECT_EQ(0, timestamp_in_ms);
}
TEST(WrapAroundTests, OldRtp_OldRtcpWrapped) {
const uint32_t kOneMsInNtpFrac = 4294967;
const uint32_t kTimestampTicksPerMs = 90;
RtcpList rtcp;
uint32_t ntp_sec = 0;
uint32_t ntp_frac = 0;
uint32_t timestamp = 0;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp -= kTimestampTicksPerMs;
rtcp.push_front(RtcpMeasurement(ntp_sec, ntp_frac, timestamp));
ntp_frac += kOneMsInNtpFrac;
timestamp += 2*kTimestampTicksPerMs;
int64_t timestamp_in_ms = -1;
EXPECT_FALSE(RtpToNtpMs(timestamp, rtcp, ×tamp_in_ms));
}
}; // namespace webrtc
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