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webrtc/modules/rtp_rtcp/source/absolute_capture_time_receiver_unittest.cc
Chen Xing 05f8f1d273 Add helper classes to send and receive abs-capture-time extensions. 
This change adds helper classes to manipulate Absolute Capture Time header extensions. Both classes support the "timestamp interpolation" optimization.

Bug: webrtc:10739
Change-Id: I08eff46eb8910842a6dbaa3288b976004fabe1c7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/149801
Commit-Queue: Chen Xing <chxg@google.com>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28936}
2019-08-22 09:09:17 +00:00

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/*
* Copyright (c) 2019 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 "modules/rtp_rtcp/source/absolute_capture_time_receiver.h"
#include "system_wrappers/include/ntp_time.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
TEST(AbsoluteCaptureTimeReceiverTest, GetSourceWithoutCsrcs) {
constexpr uint32_t kSsrc = 12;
EXPECT_EQ(AbsoluteCaptureTimeReceiver::GetSource(kSsrc, nullptr), kSsrc);
}
TEST(AbsoluteCaptureTimeReceiverTest, GetSourceWithCsrcs) {
constexpr uint32_t kSsrc = 12;
constexpr uint32_t kCsrcs[] = {34, 56, 78, 90};
EXPECT_EQ(AbsoluteCaptureTimeReceiver::GetSource(kSsrc, kCsrcs), kCsrcs[0]);
}
TEST(AbsoluteCaptureTimeReceiverTest, ReceiveExtensionReturnsExtension) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9020), absl::nullopt};
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp1,
kRtpClockFrequency, kExtension1),
kExtension1);
}
TEST(AbsoluteCaptureTimeReceiverTest, ReceiveNoExtensionReturnsNoExtension) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
static const absl::optional<AbsoluteCaptureTime> kExtension0 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
absl::nullopt);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp1,
kRtpClockFrequency, kExtension1),
absl::nullopt);
}
TEST(AbsoluteCaptureTimeReceiverTest, InterpolateLaterPacketArrivingLater) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
constexpr uint32_t kRtpTimestamp2 = kRtpTimestamp0 + 2560;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
absl::optional<AbsoluteCaptureTime> extension = receiver.OnReceivePacket(
kSource, kRtpTimestamp1, kRtpClockFrequency, kExtension1);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) + 20);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
extension = receiver.OnReceivePacket(kSource, kRtpTimestamp2,
kRtpClockFrequency, kExtension2);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) + 40);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
}
TEST(AbsoluteCaptureTimeReceiverTest, InterpolateEarlierPacketArrivingLater) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 - 1280;
constexpr uint32_t kRtpTimestamp2 = kRtpTimestamp0 - 2560;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
absl::optional<AbsoluteCaptureTime> extension = receiver.OnReceivePacket(
kSource, kRtpTimestamp1, kRtpClockFrequency, kExtension1);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) - 20);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
extension = receiver.OnReceivePacket(kSource, kRtpTimestamp2,
kRtpClockFrequency, kExtension2);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) - 40);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
}
TEST(AbsoluteCaptureTimeReceiverTest,
InterpolateLaterPacketArrivingLaterWithRtpTimestampWrapAround) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = ~uint32_t{0} - 79;
constexpr uint32_t kRtpTimestamp1 = 1280 - 80;
constexpr uint32_t kRtpTimestamp2 = 2560 - 80;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
absl::optional<AbsoluteCaptureTime> extension = receiver.OnReceivePacket(
kSource, kRtpTimestamp1, kRtpClockFrequency, kExtension1);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) + 20);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
extension = receiver.OnReceivePacket(kSource, kRtpTimestamp2,
kRtpClockFrequency, kExtension2);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) + 40);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
}
TEST(AbsoluteCaptureTimeReceiverTest,
InterpolateEarlierPacketArrivingLaterWithRtpTimestampWrapAround) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 799;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 - 1280;
constexpr uint32_t kRtpTimestamp2 = kRtpTimestamp0 - 2560;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
absl::optional<AbsoluteCaptureTime> extension = receiver.OnReceivePacket(
kSource, kRtpTimestamp1, kRtpClockFrequency, kExtension1);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) - 20);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
extension = receiver.OnReceivePacket(kSource, kRtpTimestamp2,
kRtpClockFrequency, kExtension2);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) - 40);
EXPECT_EQ(extension->estimated_capture_clock_offset,
kExtension0->estimated_capture_clock_offset);
}
TEST(AbsoluteCaptureTimeReceiverTest,
SkipEstimatedCaptureClockOffsetIfRemoteToLocalClockOffsetIsUnknown) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
constexpr uint32_t kRtpTimestamp2 = kRtpTimestamp0 + 2560;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
static const absl::optional<int64_t> kRemoteToLocalClockOffset2 =
Int64MsToQ32x32(-7000007);
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
receiver.SetRemoteToLocalClockOffset(absl::nullopt);
absl::optional<AbsoluteCaptureTime> extension = receiver.OnReceivePacket(
kSource, kRtpTimestamp1, kRtpClockFrequency, kExtension1);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) + 20);
EXPECT_EQ(extension->estimated_capture_clock_offset, absl::nullopt);
receiver.SetRemoteToLocalClockOffset(kRemoteToLocalClockOffset2);
extension = receiver.OnReceivePacket(kSource, kRtpTimestamp2,
kRtpClockFrequency, kExtension2);
EXPECT_TRUE(extension.has_value());
EXPECT_EQ(UQ32x32ToInt64Ms(extension->absolute_capture_timestamp),
UQ32x32ToInt64Ms(kExtension0->absolute_capture_timestamp) + 40);
EXPECT_EQ(extension->estimated_capture_clock_offset,
*kExtension0->estimated_capture_clock_offset +
*kRemoteToLocalClockOffset2);
}
TEST(AbsoluteCaptureTimeReceiverTest, SkipInterpolateIfTooLate) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
constexpr uint32_t kRtpTimestamp2 = kRtpTimestamp1 + 1280;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
clock.AdvanceTime(AbsoluteCaptureTimeReceiver::kInterpolationMaxInterval);
EXPECT_TRUE(receiver
.OnReceivePacket(kSource, kRtpTimestamp1, kRtpClockFrequency,
kExtension1)
.has_value());
clock.AdvanceTimeMilliseconds(1);
EXPECT_FALSE(receiver
.OnReceivePacket(kSource, kRtpTimestamp2, kRtpClockFrequency,
kExtension2)
.has_value());
}
TEST(AbsoluteCaptureTimeReceiverTest, SkipInterpolateIfSourceChanged) {
constexpr uint32_t kSource0 = 1337;
constexpr uint32_t kSource1 = 1338;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource0, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
EXPECT_FALSE(receiver
.OnReceivePacket(kSource1, kRtpTimestamp1,
kRtpClockFrequency, kExtension1)
.has_value());
}
TEST(AbsoluteCaptureTimeReceiverTest,
SkipInterpolateIfRtpClockFrequencyChanged) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency0 = 64000;
constexpr uint32_t kRtpClockFrequency1 = 32000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 640;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency0, kExtension0),
kExtension0);
EXPECT_FALSE(receiver
.OnReceivePacket(kSource, kRtpTimestamp1,
kRtpClockFrequency1, kExtension1)
.has_value());
}
TEST(AbsoluteCaptureTimeReceiverTest,
SkipInterpolateIfRtpClockFrequencyIsInvalid) {
constexpr uint32_t kSource = 1337;
constexpr uint32_t kRtpClockFrequency = 0;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 640;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
EXPECT_FALSE(receiver
.OnReceivePacket(kSource, kRtpTimestamp1, kRtpClockFrequency,
kExtension1)
.has_value());
}
TEST(AbsoluteCaptureTimeReceiverTest, SkipInterpolateIsSticky) {
constexpr uint32_t kSource0 = 1337;
constexpr uint32_t kSource1 = 1338;
constexpr uint32_t kSource2 = 1337;
constexpr uint32_t kRtpClockFrequency = 64000;
constexpr uint32_t kRtpTimestamp0 = 1020300000;
constexpr uint32_t kRtpTimestamp1 = kRtpTimestamp0 + 1280;
constexpr uint32_t kRtpTimestamp2 = kRtpTimestamp1 + 1280;
static const absl::optional<AbsoluteCaptureTime> kExtension0 =
AbsoluteCaptureTime{Int64MsToUQ32x32(9000), Int64MsToQ32x32(-350)};
static const absl::optional<AbsoluteCaptureTime> kExtension1 = absl::nullopt;
static const absl::optional<AbsoluteCaptureTime> kExtension2 = absl::nullopt;
SimulatedClock clock(0);
AbsoluteCaptureTimeReceiver receiver(&clock);
receiver.SetRemoteToLocalClockOffset(0);
EXPECT_EQ(receiver.OnReceivePacket(kSource0, kRtpTimestamp0,
kRtpClockFrequency, kExtension0),
kExtension0);
EXPECT_FALSE(receiver
.OnReceivePacket(kSource1, kRtpTimestamp1,
kRtpClockFrequency, kExtension1)
.has_value());
EXPECT_FALSE(receiver
.OnReceivePacket(kSource2, kRtpTimestamp2,
kRtpClockFrequency, kExtension2)
.has_value());
}
} // namespace webrtc
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