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
|
// Copyright (c) 2016 The WebM 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 "m2ts/webm2pes.h"
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include <cstring>
#include <limits>
#include <string>
#include <vector>
#include "gtest/gtest.h"
#include "common/file_util.h"
#include "common/libwebm_util.h"
#include "m2ts/vpxpes_parser.h"
#include "testing/test_util.h"
namespace {
class Webm2PesTests : public ::testing::Test {
public:
// Constants for validating known values from input data.
const std::uint8_t kMinVideoStreamId = 0xE0;
const std::uint8_t kMaxVideoStreamId = 0xEF;
const int kPesHeaderSize = 6;
const int kPesOptionalHeaderStartOffset = kPesHeaderSize;
const int kPesOptionalHeaderSize = 9;
const int kPesOptionalHeaderMarkerValue = 0x2;
const int kWebm2PesOptHeaderRemainingSize = 6;
const int kBcmvHeaderSize = 10;
Webm2PesTests() = default;
~Webm2PesTests() = default;
void CreateAndLoadTestInput() {
libwebm::Webm2Pes converter(input_file_name_, temp_file_name_.name());
ASSERT_TRUE(converter.ConvertToFile());
ASSERT_TRUE(parser_.Open(pes_file_name()));
}
bool VerifyPacketStartCode(const libwebm::VpxPesParser::PesHeader& header) {
// PES packets all start with the byte sequence 0x0 0x0 0x1.
if (header.start_code[0] != 0 || header.start_code[1] != 0 ||
header.start_code[2] != 1) {
return false;
}
return true;
}
const std::string& pes_file_name() const { return temp_file_name_.name(); }
libwebm::VpxPesParser* parser() { return &parser_; }
private:
const libwebm::TempFileDeleter temp_file_name_;
const std::string input_file_name_ =
test::GetTestFilePath("bbb_480p_vp9_opus_1second.webm");
libwebm::VpxPesParser parser_;
};
TEST_F(Webm2PesTests, CreatePesFile) { CreateAndLoadTestInput(); }
TEST_F(Webm2PesTests, CanParseFirstPacket) {
CreateAndLoadTestInput();
libwebm::VpxPesParser::PesHeader header;
libwebm::VideoFrame frame;
ASSERT_TRUE(parser()->ParseNextPacket(&header, &frame));
EXPECT_TRUE(VerifyPacketStartCode(header));
// 9 bytes: PES optional header
// 10 bytes: BCMV Header
// 83 bytes: frame
// 102 bytes total in packet length field:
const std::size_t kPesPayloadLength = 102;
EXPECT_EQ(kPesPayloadLength, header.packet_length);
EXPECT_GE(header.stream_id, kMinVideoStreamId);
EXPECT_LE(header.stream_id, kMaxVideoStreamId);
// Test PesOptionalHeader values.
EXPECT_EQ(kPesOptionalHeaderMarkerValue, header.opt_header.marker);
EXPECT_EQ(kWebm2PesOptHeaderRemainingSize, header.opt_header.remaining_size);
EXPECT_EQ(0, header.opt_header.scrambling);
EXPECT_EQ(0, header.opt_header.priority);
EXPECT_EQ(0, header.opt_header.data_alignment);
EXPECT_EQ(0, header.opt_header.copyright);
EXPECT_EQ(0, header.opt_header.original);
EXPECT_EQ(1, header.opt_header.has_pts);
EXPECT_EQ(0, header.opt_header.has_dts);
EXPECT_EQ(0, header.opt_header.unused_fields);
// Test the BCMV header.
// Note: The length field of the BCMV header includes its own length.
const std::size_t kBcmvBaseLength = 10;
const std::size_t kFirstFrameLength = 83;
const libwebm::VpxPesParser::BcmvHeader kFirstBcmvHeader(kFirstFrameLength +
kBcmvBaseLength);
EXPECT_TRUE(header.bcmv_header.Valid());
EXPECT_EQ(kFirstBcmvHeader, header.bcmv_header);
// Parse the next packet to confirm correct parse and consumption of payload.
EXPECT_TRUE(parser()->ParseNextPacket(&header, &frame));
}
TEST_F(Webm2PesTests, CanMuxLargeBuffers) {
const std::size_t kBufferSize = 100 * 1024;
const std::int64_t kFakeTimestamp = libwebm::kNanosecondsPerSecond;
libwebm::VideoFrame fake_frame(kFakeTimestamp, libwebm::VideoFrame::kVP9);
ASSERT_TRUE(fake_frame.Init(kBufferSize));
std::memset(fake_frame.buffer().data.get(), 0x80, kBufferSize);
ASSERT_TRUE(fake_frame.SetBufferLength(kBufferSize));
libwebm::PacketDataBuffer pes_packet_buffer;
ASSERT_TRUE(
libwebm::Webm2Pes::WritePesPacket(fake_frame, &pes_packet_buffer));
// TODO(tomfinegan): Change VpxPesParser so it can read from a buffer, and get
// rid of this extra step.
libwebm::FilePtr pes_file(std::fopen(pes_file_name().c_str(), "wb"),
libwebm::FILEDeleter());
ASSERT_EQ(pes_packet_buffer.size(),
fwrite(&pes_packet_buffer[0], 1, pes_packet_buffer.size(),
pes_file.get()));
fclose(pes_file.get());
pes_file.release();
libwebm::VpxPesParser parser;
ASSERT_TRUE(parser.Open(pes_file_name()));
libwebm::VpxPesParser::PesHeader header;
libwebm::VideoFrame parsed_frame;
ASSERT_TRUE(parser.ParseNextPacket(&header, &parsed_frame));
EXPECT_EQ(fake_frame.nanosecond_pts(), parsed_frame.nanosecond_pts());
EXPECT_EQ(fake_frame.buffer().length, parsed_frame.buffer().length);
EXPECT_EQ(0, std::memcmp(fake_frame.buffer().data.get(),
parsed_frame.buffer().data.get(), kBufferSize));
}
TEST_F(Webm2PesTests, ParserConsumesAllInput) {
CreateAndLoadTestInput();
libwebm::VpxPesParser::PesHeader header;
libwebm::VideoFrame frame;
while (parser()->ParseNextPacket(&header, &frame) == true) {
EXPECT_TRUE(VerifyPacketStartCode(header));
}
EXPECT_EQ(0, parser()->BytesAvailable());
}
} // namespace
|
