1/*
2 *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "webrtc/modules/rtp_rtcp/source/rtcp_packet/sli.h"
12
13#include "testing/gmock/include/gmock/gmock.h"
14#include "testing/gtest/include/gtest/gtest.h"
15
16using testing::ElementsAreArray;
17using testing::make_tuple;
18using webrtc::rtcp::RawPacket;
19using webrtc::rtcp::Sli;
20using webrtc::RTCPUtility::RtcpCommonHeader;
21using webrtc::RTCPUtility::RtcpParseCommonHeader;
22
23namespace webrtc {
24namespace {
25
26const uint32_t kSenderSsrc = 0x12345678;
27const uint32_t kRemoteSsrc = 0x23456789;
28
29const uint8_t kPictureId = 0x3f;
30const uint16_t kFirstMb = 0x1e61;
31const uint16_t kNumberOfMb = 0x1a0a;
32const uint32_t kSliItem = (static_cast<uint32_t>(kFirstMb) << 19) |
33                          (static_cast<uint32_t>(kNumberOfMb) << 6) |
34                           static_cast<uint32_t>(kPictureId);
35
36// Manually created Sli packet matching constants above.
37const uint8_t kPacket[] = {0x82,  206, 0x00, 0x03,
38                           0x12, 0x34, 0x56, 0x78,
39                           0x23, 0x45, 0x67, 0x89,
40                           (kSliItem >> 24) & 0xff,
41                           (kSliItem >> 16) & 0xff,
42                           (kSliItem >> 8) & 0xff,
43                           kSliItem & 0xff};
44const size_t kPacketLength = sizeof(kPacket);
45
46bool ParseSli(const uint8_t* buffer, size_t length, Sli* sli) {
47  RtcpCommonHeader header;
48  EXPECT_TRUE(RtcpParseCommonHeader(buffer, length, &header));
49  EXPECT_EQ(length, header.BlockSize());
50  return sli->Parse(header, buffer + RtcpCommonHeader::kHeaderSizeBytes);
51}
52
53TEST(RtcpPacketSliTest, Create) {
54  Sli sli;
55  sli.From(kSenderSsrc);
56  sli.To(kRemoteSsrc);
57  sli.WithPictureId(kPictureId, kFirstMb, kNumberOfMb);
58
59  rtc::scoped_ptr<RawPacket> packet(sli.Build());
60
61  EXPECT_THAT(make_tuple(packet->Buffer(), packet->Length()),
62              ElementsAreArray(kPacket));
63}
64
65TEST(RtcpPacketSliTest, Parse) {
66  Sli mutable_parsed;
67  EXPECT_TRUE(ParseSli(kPacket, kPacketLength, &mutable_parsed));
68  const Sli& parsed = mutable_parsed;  // Read values from constant object.
69
70  EXPECT_EQ(kSenderSsrc, parsed.sender_ssrc());
71  EXPECT_EQ(kRemoteSsrc, parsed.media_ssrc());
72  EXPECT_EQ(1u, parsed.macroblocks().size());
73  EXPECT_EQ(kFirstMb, parsed.macroblocks()[0].first());
74  EXPECT_EQ(kNumberOfMb, parsed.macroblocks()[0].number());
75  EXPECT_EQ(kPictureId, parsed.macroblocks()[0].picture_id());
76}
77
78TEST(RtcpPacketSliTest, ParseFailsOnTooSmallPacket) {
79  Sli sli;
80  sli.From(kSenderSsrc);
81  sli.To(kRemoteSsrc);
82  sli.WithPictureId(kPictureId, kFirstMb, kNumberOfMb);
83
84  rtc::scoped_ptr<RawPacket> packet(sli.Build());
85  packet->MutableBuffer()[3]--;  // Decrease size by 1 word (4 bytes).
86
87  EXPECT_FALSE(ParseSli(packet->Buffer(), packet->Length() - 4, &sli));
88}
89
90}  // namespace
91}  // namespace webrtc
92