1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/*
* Copyright (c) 2016 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 "call/flexfec_receive_stream.h"
#include <cstdint>
#include <memory>
#include <vector>
#include "api/array_view.h"
#include "api/call/transport.h"
#include "api/rtp_headers.h"
#include "api/rtp_parameters.h"
#include "call/flexfec_receive_stream_impl.h"
#include "call/rtp_stream_receiver_controller.h"
#include "modules/rtp_rtcp/include/rtp_rtcp_defines.h"
#include "modules/rtp_rtcp/mocks/mock_recovered_packet_receiver.h"
#include "modules/rtp_rtcp/mocks/mock_rtcp_rtt_stats.h"
#include "modules/rtp_rtcp/source/byte_io.h"
#include "modules/rtp_rtcp/source/rtp_header_extensions.h"
#include "modules/rtp_rtcp/source/rtp_packet_received.h"
#include "test/gmock.h"
#include "test/gtest.h"
#include "test/mock_transport.h"
namespace webrtc {
namespace {
using ::testing::_;
constexpr uint8_t kFlexfecPlType = 118;
constexpr uint8_t kFlexfecSsrc[] = {0x00, 0x00, 0x00, 0x01};
constexpr uint8_t kMediaSsrc[] = {0x00, 0x00, 0x00, 0x02};
FlexfecReceiveStream::Config CreateDefaultConfig(
Transport* rtcp_send_transport) {
FlexfecReceiveStream::Config config(rtcp_send_transport);
config.payload_type = kFlexfecPlType;
config.rtp.remote_ssrc = ByteReader<uint32_t>::ReadBigEndian(kFlexfecSsrc);
config.protected_media_ssrcs = {
ByteReader<uint32_t>::ReadBigEndian(kMediaSsrc)};
EXPECT_TRUE(config.IsCompleteAndEnabled());
return config;
}
RtpPacketReceived ParsePacket(rtc::ArrayView<const uint8_t> packet) {
RtpPacketReceived parsed_packet(nullptr);
EXPECT_TRUE(parsed_packet.Parse(packet));
return parsed_packet;
}
} // namespace
TEST(FlexfecReceiveStreamConfigTest, IsCompleteAndEnabled) {
MockTransport rtcp_send_transport;
FlexfecReceiveStream::Config config(&rtcp_send_transport);
config.rtp.local_ssrc = 18374743;
config.rtcp_mode = RtcpMode::kCompound;
config.rtp.transport_cc = true;
config.rtp.extensions.emplace_back(TransportSequenceNumber::kUri, 7);
EXPECT_FALSE(config.IsCompleteAndEnabled());
config.payload_type = 123;
EXPECT_FALSE(config.IsCompleteAndEnabled());
config.rtp.remote_ssrc = 238423838;
EXPECT_FALSE(config.IsCompleteAndEnabled());
config.protected_media_ssrcs.push_back(138989393);
EXPECT_TRUE(config.IsCompleteAndEnabled());
config.protected_media_ssrcs.push_back(33423423);
EXPECT_FALSE(config.IsCompleteAndEnabled());
}
class FlexfecReceiveStreamTest : public ::testing::Test {
protected:
FlexfecReceiveStreamTest()
: config_(CreateDefaultConfig(&rtcp_send_transport_)) {
receive_stream_ = std::make_unique<FlexfecReceiveStreamImpl>(
Clock::GetRealTimeClock(), config_, &recovered_packet_receiver_,
&rtt_stats_);
receive_stream_->RegisterWithTransport(&rtp_stream_receiver_controller_);
}
~FlexfecReceiveStreamTest() {
receive_stream_->UnregisterFromTransport();
}
MockTransport rtcp_send_transport_;
FlexfecReceiveStream::Config config_;
MockRecoveredPacketReceiver recovered_packet_receiver_;
MockRtcpRttStats rtt_stats_;
RtpStreamReceiverController rtp_stream_receiver_controller_;
std::unique_ptr<FlexfecReceiveStreamImpl> receive_stream_;
};
TEST_F(FlexfecReceiveStreamTest, ConstructDestruct) {}
// Create a FlexFEC packet that protects a single media packet and ensure
// that the callback is called. Correctness of recovery is checked in the
// FlexfecReceiver unit tests.
TEST_F(FlexfecReceiveStreamTest, RecoversPacket) {
constexpr uint8_t kFlexfecSeqNum[] = {0x00, 0x01};
constexpr uint8_t kFlexfecTs[] = {0x00, 0x11, 0x22, 0x33};
constexpr uint8_t kMediaPlType = 107;
constexpr uint8_t kMediaSeqNum[] = {0x00, 0x02};
constexpr uint8_t kMediaTs[] = {0xaa, 0xbb, 0xcc, 0xdd};
// This packet mask protects a single media packet, i.e., the FlexFEC payload
// is a copy of that media packet. When inserted in the FlexFEC pipeline,
// it will thus trivially recover the lost media packet.
constexpr uint8_t kKBit0 = 1 << 7;
constexpr uint8_t kFlexfecPktMask[] = {kKBit0 | 0x00, 0x01};
constexpr uint8_t kPayloadLength[] = {0x00, 0x04};
constexpr uint8_t kSsrcCount = 1;
constexpr uint8_t kReservedBits = 0x00;
constexpr uint8_t kPayloadBits = 0x00;
// clang-format off
constexpr uint8_t kFlexfecPacket[] = {
// RTP header.
0x80, kFlexfecPlType, kFlexfecSeqNum[0], kFlexfecSeqNum[1],
kFlexfecTs[0], kFlexfecTs[1], kFlexfecTs[2], kFlexfecTs[3],
kFlexfecSsrc[0], kFlexfecSsrc[1], kFlexfecSsrc[2], kFlexfecSsrc[3],
// FlexFEC header.
0x00, kMediaPlType, kPayloadLength[0], kPayloadLength[1],
kMediaTs[0], kMediaTs[1], kMediaTs[2], kMediaTs[3],
kSsrcCount, kReservedBits, kReservedBits, kReservedBits,
kMediaSsrc[0], kMediaSsrc[1], kMediaSsrc[2], kMediaSsrc[3],
kMediaSeqNum[0], kMediaSeqNum[1], kFlexfecPktMask[0], kFlexfecPktMask[1],
// FEC payload.
kPayloadBits, kPayloadBits, kPayloadBits, kPayloadBits};
// clang-format on
::testing::StrictMock<MockRecoveredPacketReceiver> recovered_packet_receiver;
FlexfecReceiveStreamImpl receive_stream(Clock::GetRealTimeClock(), config_,
&recovered_packet_receiver,
&rtt_stats_);
receive_stream.RegisterWithTransport(&rtp_stream_receiver_controller_);
EXPECT_CALL(recovered_packet_receiver,
OnRecoveredPacket(_, kRtpHeaderSize + kPayloadLength[1]));
receive_stream.OnRtpPacket(ParsePacket(kFlexfecPacket));
// Tear-down
receive_stream.UnregisterFromTransport();
}
} // namespace webrtc
|
