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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 <string.h> | |
12 | |
13 #include <memory> | |
14 #include <utility> | |
15 | |
16 #include "testing/gtest/include/gtest/gtest.h" | |
17 #include "webrtc/base/basictypes.h" | |
18 #include "webrtc/base/checks.h" | |
19 #include "webrtc/base/random.h" | |
20 #include "webrtc/base/scoped_ref_ptr.h" | |
21 #include "webrtc/modules/rtp_rtcp/source/fec_test_helper.h" | |
22 #include "webrtc/modules/rtp_rtcp/source/flexfec_header_reader_writer.h" | |
23 #include "webrtc/modules/rtp_rtcp/source/forward_error_correction.h" | |
24 #include "webrtc/modules/rtp_rtcp/source/forward_error_correction_internal.h" | |
25 | |
26 namespace webrtc { | |
27 | |
28 namespace { | |
29 | |
30 using Packet = ::webrtc::ForwardErrorCorrection::Packet; | |
31 using ReceivedFecPacket = ::webrtc::ForwardErrorCorrection::ReceivedFecPacket; | |
32 | |
33 constexpr uint32_t kMediaSsrc = 1254983; | |
34 constexpr uint16_t kMediaStartSeqNum = 825; | |
35 constexpr size_t kMediaPacketLength = 1234; | |
36 constexpr uint32_t kFlexfecSsrc = 52142; | |
37 | |
38 // Assume single-stream protection. | |
39 constexpr size_t kFlexfecHeaderSizeKBit0Set = 20; | |
40 constexpr size_t kFlexfecHeaderSizeKBit1Set = 24; | |
41 constexpr size_t kFlexfecHeaderSizeKBit2Set = 32; | |
42 constexpr size_t kFlexfecPacketMaskOffset = 18; | |
43 constexpr size_t kFlexfecPacketMaskSizeKBit0Set = 2; | |
44 constexpr size_t kFlexfecPacketMaskSizeKBit1Set = 6; | |
45 constexpr size_t kFlexfecPacketMaskSizeKBit2Set = 14; | |
46 constexpr size_t kFlexfecMaxPacketSize = kFlexfecPacketMaskSizeKBit2Set; | |
47 | |
48 std::unique_ptr<uint8_t[]> GeneratePacketMask(size_t packet_mask_size, | |
49 uint64_t seed) { | |
50 Random random(seed); | |
51 std::unique_ptr<uint8_t[]> packet_mask(new uint8_t[kFlexfecMaxPacketSize]); | |
52 memset(packet_mask.get(), 0, kFlexfecMaxPacketSize); | |
53 for (size_t i = 0; i < packet_mask_size; ++i) { | |
54 packet_mask[i] = random.Rand<uint8_t>(); | |
55 } | |
56 return packet_mask; | |
57 } | |
58 | |
59 void ClearBit(size_t index, uint8_t* packet_mask) { | |
60 packet_mask[index / 8] &= ~(1 << (7 - index % 8)); | |
61 } | |
62 | |
63 void SetBit(size_t index, uint8_t* packet_mask) { | |
64 packet_mask[index / 8] |= (1 << (7 - index % 8)); | |
65 } | |
66 | |
67 rtc::scoped_refptr<Packet> WriteHeader(const uint8_t* packet_mask, | |
68 size_t packet_mask_size) { | |
69 FlexfecHeaderWriter writer; | |
70 rtc::scoped_refptr<Packet> written_packet(new Packet()); | |
71 written_packet->length = kMediaPacketLength; | |
72 for (size_t i = 0; i < written_packet->length; ++i) { | |
73 written_packet->data[i] = i; // Actual content doesn't matter. | |
74 } | |
75 writer.FinalizeFecHeader(kMediaSsrc, kMediaStartSeqNum, packet_mask, | |
76 packet_mask_size, written_packet.get()); | |
77 return written_packet; | |
78 } | |
79 | |
80 std::unique_ptr<ReceivedFecPacket> ReadHeader(const Packet& written_packet) { | |
81 FlexfecHeaderReader reader; | |
82 std::unique_ptr<ReceivedFecPacket> read_packet(new ReceivedFecPacket()); | |
83 read_packet->ssrc = kFlexfecSsrc; | |
84 read_packet->pkt = rtc::scoped_refptr<Packet>(new Packet()); | |
85 memcpy(read_packet->pkt->data, written_packet.data, written_packet.length); | |
86 read_packet->pkt->length = written_packet.length; | |
87 EXPECT_TRUE(reader.ReadFecHeader(read_packet.get())); | |
88 return read_packet; | |
89 } | |
90 | |
91 void VerifyHeaders(size_t expected_fec_header_size, | |
92 const uint8_t* expected_packet_mask, | |
93 size_t expected_packet_mask_size, | |
94 const Packet& written_packet, | |
95 const ReceivedFecPacket& read_packet) { | |
96 EXPECT_EQ(kFlexfecSsrc, read_packet.ssrc); | |
97 EXPECT_EQ(expected_fec_header_size, read_packet.fec_header_size); | |
98 EXPECT_EQ(kMediaSsrc, read_packet.protected_ssrc); | |
99 EXPECT_EQ(kMediaStartSeqNum, read_packet.seq_num_base); | |
100 EXPECT_EQ(kFlexfecPacketMaskOffset, read_packet.packet_mask_offset); | |
101 ASSERT_EQ(expected_packet_mask_size, read_packet.packet_mask_size); | |
102 EXPECT_EQ(written_packet.length - expected_fec_header_size, | |
103 read_packet.protection_length); | |
104 // Verify that the call to ReadFecHeader did normalize the packet masks. | |
105 EXPECT_EQ(0, memcmp(expected_packet_mask, | |
106 &read_packet.pkt->data[read_packet.packet_mask_offset], | |
107 read_packet.packet_mask_size)); | |
108 // Verify that the call to ReadFecHeader did not tamper with the payload. | |
109 EXPECT_EQ(0, memcmp(&written_packet.data[expected_fec_header_size], | |
110 &read_packet.pkt->data[expected_fec_header_size], | |
111 written_packet.length - expected_fec_header_size)); | |
112 } | |
113 | |
114 } // namespace | |
115 | |
116 TEST(FlexfecHeaderReaderTest, CorrectlyReadsHeaderWithKBit0Set) { | |
danilchap
2016/09/14 13:12:09
'Correctly' is implicit for tests (at least should
brandtr
2016/09/20 11:13:33
Changed.
| |
117 const uint8_t packet[] = { | |
118 0x00, 0x00, 0xab, 0xcd, // F, R bits clear, "random" length recovery | |
danilchap
2016/09/14 13:12:09
remove 'random', it is misleading
brandtr
2016/09/20 11:13:33
Done.
| |
119 0x01, 0x23, 0x45, 0x67, // "random" TS recovery | |
danilchap
2016/09/14 13:12:09
what is TS?
brandtr
2016/09/20 11:13:32
TimeStamp. This follows the nomenclature in the In
| |
120 0x01, 0x00, 0x00, 0x00, // SSRCCount = 1. Reserved bits are zero. | |
danilchap
2016/09/14 13:12:09
may be
constexpr size_t kSsrcCount = 1;
constexpr
brandtr
2016/09/20 11:13:32
Done.
| |
121 0x11, 0x22, 0x33, 0x44, // "random" SSRC | |
122 0xaa, 0xbb, 0x88, 0x81, // "random" SN base, K-bit 0 set, "random" mask | |
danilchap
2016/09/14 13:12:09
Having 3 comments describing different bytes doesn
brandtr
2016/09/20 11:13:33
Changed, now I align the different packet masks wi
| |
123 0x00, 0x00, 0x00, 0x00 // payload | |
danilchap
2016/09/14 13:12:09
try to start comments with Uppercase and finish wi
brandtr
2016/09/20 11:13:33
Done.
| |
124 }; | |
125 const size_t packet_length = sizeof(packet); | |
126 ReceivedFecPacket read_packet; | |
127 read_packet.pkt = rtc::scoped_refptr<Packet>(new Packet()); | |
128 memcpy(read_packet.pkt->data, packet, packet_length); | |
129 read_packet.pkt->length = packet_length; | |
130 FlexfecHeaderReader reader; | |
131 EXPECT_TRUE(reader.ReadFecHeader(&read_packet)); | |
danilchap
2016/09/14 13:12:09
add an empty line above to split preparation and e
brandtr
2016/09/20 11:13:33
Done.
| |
132 | |
133 EXPECT_EQ(20U, read_packet.fec_header_size); | |
134 EXPECT_EQ( | |
135 static_cast<uint32_t>((0x11 << 24) + (0x22 << 16) + (0x33 << 8) + 0x44), | |
danilchap
2016/09/14 13:12:09
use 0x11223344
or better define a constant above k
brandtr
2016/09/20 11:13:33
Done.
| |
136 read_packet.protected_ssrc); | |
137 EXPECT_EQ((0xaa << 8) + 0xbb, read_packet.seq_num_base); | |
138 const size_t packet_mask_offset = read_packet.packet_mask_offset; | |
139 EXPECT_EQ(18U, packet_mask_offset); | |
140 const size_t packet_mask_size = read_packet.packet_mask_size; | |
141 EXPECT_EQ(2U, packet_mask_size); | |
142 EXPECT_EQ(packet_length - 20, read_packet.protection_length); | |
danilchap
2016/09/14 13:12:09
what is 20?
brandtr
2016/09/20 11:13:33
It's the FEC header size. This has been clarified,
| |
143 // Ensure that the K-bits are removed and the packet mask has been packed. | |
144 const uint8_t ulpfec_packet_mask[] = {0x11, 0x02}; | |
danilchap
2016/09/14 13:12:09
name it as a constant, not a variable and move to
brandtr
2016/09/20 11:13:32
Done.
| |
145 EXPECT_EQ( | |
146 0, memcmp(ulpfec_packet_mask, read_packet.pkt->data + packet_mask_offset, | |
147 packet_mask_size)); | |
148 } | |
149 | |
150 TEST(FlexfecHeaderReaderTest, CorrectlyReadsHeaderWithKBit1Set) { | |
151 const uint8_t packet[] = { | |
152 0x00, 0x00, 0xab, 0xcd, // F, R bits clear, "random" length recovery | |
153 0x01, 0x23, 0x45, 0x67, // "random" TS recovery | |
154 0x01, 0x00, 0x00, 0x00, // SSRCCount = 1. Reserved bits are zero. | |
155 0x44, 0x33, 0x22, 0x11, // "random" SSRC | |
156 0xbb, 0xcc, 0x48, 0x81, // "random" SN base, K-bit 0 clear, "random" mask | |
157 0x82, 0x11, 0x00, 0x21, // K-bit 1 set | |
158 0x00, 0x00, 0x00, 0x00 // payload | |
159 }; | |
160 const size_t packet_length = sizeof(packet); | |
161 ReceivedFecPacket read_packet; | |
162 read_packet.pkt = rtc::scoped_refptr<Packet>(new Packet()); | |
163 memcpy(read_packet.pkt->data, packet, packet_length); | |
164 read_packet.pkt->length = packet_length; | |
165 FlexfecHeaderReader reader; | |
166 EXPECT_TRUE(reader.ReadFecHeader(&read_packet)); | |
167 | |
168 EXPECT_EQ(24U, read_packet.fec_header_size); | |
169 EXPECT_EQ( | |
170 static_cast<uint32_t>((0x44 << 24) + (0x33 << 16) + (0x22 << 8) + 0x11), | |
171 read_packet.protected_ssrc); | |
172 EXPECT_EQ((0xbb << 8) + 0xcc, read_packet.seq_num_base); | |
173 const size_t packet_mask_offset = read_packet.packet_mask_offset; | |
174 EXPECT_EQ(18U, packet_mask_offset); | |
175 const size_t packet_mask_size = read_packet.packet_mask_size; | |
176 EXPECT_EQ(6U, packet_mask_size); | |
177 EXPECT_EQ(packet_length - 24, read_packet.protection_length); | |
178 // Ensure that the K-bits are removed and the packet mask has been packed. | |
179 const uint8_t ulpfec_packet_mask[] = {0x91, 0x02, 0x08, 0x44, 0x00, 0x84}; | |
180 EXPECT_EQ( | |
181 0, memcmp(ulpfec_packet_mask, read_packet.pkt->data + packet_mask_offset, | |
182 packet_mask_size)); | |
183 } | |
184 | |
185 TEST(FlexfecHeaderReaderTest, CorrectlyReadsHeaderWithKBit2Set) { | |
186 // | |
187 const uint8_t packet[] = { | |
188 0x00, 0x00, 0xab, 0xcd, // F, R bits clear, "random" length recovery | |
189 0x01, 0x23, 0x45, 0x67, // "random" TS recovery | |
190 0x01, 0x00, 0x00, 0x00, // SSRCCount = 1. Reserved bits are zero. | |
191 0x4a, 0x3b, 0x2c, 0x1d, // "random" SSRC | |
192 0xbd, 0xdb, 0x48, 0x81, // "random" SN base, K-bit 0 clear, "random" mask | |
193 0x02, 0x11, 0x00, 0x21, // K-bit 1 clear | |
194 0x81, 0x11, 0x11, 0x11, // K-bit 2 set | |
195 0x11, 0x11, 0x11, 0x11, // | |
196 0x00, 0x00, 0x00, 0x00 // payload | |
197 }; | |
198 const size_t packet_length = sizeof(packet); | |
199 ReceivedFecPacket read_packet; | |
200 read_packet.pkt = rtc::scoped_refptr<Packet>(new Packet()); | |
201 memcpy(read_packet.pkt->data, packet, packet_length); | |
202 read_packet.pkt->length = packet_length; | |
203 FlexfecHeaderReader reader; | |
204 EXPECT_TRUE(reader.ReadFecHeader(&read_packet)); | |
205 | |
206 EXPECT_EQ(32U, read_packet.fec_header_size); | |
207 EXPECT_EQ( | |
208 static_cast<uint32_t>((0x4a << 24) + (0x3b << 16) + (0x2c << 8) + 0x1d), | |
209 read_packet.protected_ssrc); | |
210 EXPECT_EQ((0xbd << 8) + 0xdb, read_packet.seq_num_base); | |
211 const size_t packet_mask_offset = read_packet.packet_mask_offset; | |
212 EXPECT_EQ(18U, packet_mask_offset); | |
213 const size_t packet_mask_size = read_packet.packet_mask_size; | |
214 EXPECT_EQ(14U, packet_mask_size); | |
215 EXPECT_EQ(packet_length - 32, read_packet.protection_length); | |
216 // Ensure that the K-bits are removed and the packet mask has been packed. | |
217 const uint8_t ulpfec_packet_mask[] = {0x91, 0x02, 0x08, 0x44, 0x00, | |
218 0x84, 0x08, 0x88, 0x88, 0x88, | |
219 0x88, 0x88, 0x88, 0x88}; | |
220 EXPECT_EQ( | |
221 0, memcmp(ulpfec_packet_mask, read_packet.pkt->data + packet_mask_offset, | |
222 packet_mask_size)); | |
223 } | |
224 | |
225 TEST(FlexfecHeaderReaderTest, ReadPacketWithoutStreamSpecificHeaderShouldFail) { | |
226 FlexfecHeaderReader reader; | |
227 | |
228 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
229 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
230 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
231 | |
232 // Simulate short received packet. | |
233 ReceivedFecPacket read_packet; | |
234 read_packet.ssrc = kFlexfecSsrc; | |
235 read_packet.pkt = std::move(written_packet); | |
236 read_packet.pkt->length = 12; | |
237 EXPECT_FALSE(reader.ReadFecHeader(&read_packet)); | |
238 } | |
239 | |
240 TEST(FlexfecHeaderReaderTest, ReadShortPacketWithKBit0SetShouldFail) { | |
241 FlexfecHeaderReader reader; | |
242 | |
243 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
244 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
245 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
246 | |
247 // Simulate short received packet. | |
248 ReceivedFecPacket read_packet; | |
249 read_packet.ssrc = kFlexfecSsrc; | |
250 read_packet.pkt = std::move(written_packet); | |
251 read_packet.pkt->length = 18; | |
252 EXPECT_FALSE(reader.ReadFecHeader(&read_packet)); | |
253 } | |
254 | |
255 TEST(FlexfecHeaderReaderTest, ReadShortPacketWithKBit1SetShouldFail) { | |
256 FlexfecHeaderReader reader; | |
257 | |
258 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
259 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
260 SetBit(15, packet_mask.get()); // This expands the packet mask "once". | |
261 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
262 | |
263 // Simulate short received packet. | |
264 ReceivedFecPacket read_packet; | |
265 read_packet.ssrc = kFlexfecSsrc; | |
266 read_packet.pkt = std::move(written_packet); | |
267 read_packet.pkt->length = 20; | |
268 EXPECT_FALSE(reader.ReadFecHeader(&read_packet)); | |
269 } | |
270 | |
271 TEST(FlexfecHeaderReaderTest, ReadShortPacketWithKBit2SetShouldFail) { | |
272 FlexfecHeaderReader reader; | |
273 | |
274 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
275 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
276 SetBit(47, packet_mask.get()); // This expands the packet mask "twice". | |
277 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
278 | |
279 // Simulate short received packet. | |
280 ReceivedFecPacket read_packet; | |
281 read_packet.ssrc = kFlexfecSsrc; | |
282 read_packet.pkt = std::move(written_packet); | |
283 read_packet.pkt->length = 24; | |
284 EXPECT_FALSE(reader.ReadFecHeader(&read_packet)); | |
285 } | |
286 | |
287 TEST(FlexfecHeaderWriterTest, CorrectlyFinalizesHeaderWithKBit0Set) { | |
288 const uint8_t ulpfec_packet_mask[] = {0x11, 0x02}; | |
289 Packet written_packet; | |
290 written_packet.length = kMediaPacketLength; | |
291 for (size_t i = 0; i < written_packet.length; ++i) { | |
292 written_packet.data[i] = i; | |
293 } | |
294 FlexfecHeaderWriter writer; | |
295 writer.FinalizeFecHeader(kMediaSsrc, kMediaStartSeqNum, ulpfec_packet_mask, | |
296 sizeof(ulpfec_packet_mask), &written_packet); | |
297 | |
298 const uint8_t* packet = written_packet.data; | |
299 EXPECT_EQ(0x00, packet[0] & 0xc0); // F and R bits clear. | |
300 EXPECT_EQ(0x01, packet[8]); // SSRCCount = 1 | |
301 EXPECT_EQ(kMediaSsrc, | |
302 static_cast<uint32_t>((packet[12] << 24) + (packet[13] << 16) + | |
danilchap
2016/09/14 13:12:09
may be
EXPECT_EQ(kMediaSsrc, ByteReader<uint32_t>
brandtr
2016/09/20 11:13:33
Done.
| |
303 (packet[14] << 8) + packet[15])); | |
304 EXPECT_EQ(kMediaStartSeqNum, | |
305 static_cast<uint16_t>((packet[16] << 8) + packet[17])); | |
306 const uint8_t flexfec_packet_mask[] = {0x88, 0x81}; | |
307 EXPECT_EQ( | |
308 0, memcmp(flexfec_packet_mask, packet + 18, sizeof(flexfec_packet_mask))); | |
danilchap
2016/09/14 13:12:09
might be better to split into 2 expectations:
EXPE
brandtr
2016/09/20 11:13:33
Done.
Thanks for writing out the gmock code for m
| |
309 } | |
310 | |
311 TEST(FlexfecHeaderWriterTest, CorrectlyFinalizesHeaderWithKBit1Set) { | |
312 const uint8_t ulpfec_packet_mask[] = {0x91, 0x02, 0x08, 0x44, 0x00, 0x84}; | |
313 Packet written_packet; | |
314 written_packet.length = kMediaPacketLength; | |
315 for (size_t i = 0; i < written_packet.length; ++i) { | |
316 written_packet.data[i] = i; | |
317 } | |
318 FlexfecHeaderWriter writer; | |
319 writer.FinalizeFecHeader(kMediaSsrc, kMediaStartSeqNum, ulpfec_packet_mask, | |
320 sizeof(ulpfec_packet_mask), &written_packet); | |
321 | |
322 const uint8_t* packet = written_packet.data; | |
323 EXPECT_EQ(0x00, packet[0] & 0xc0); // F and R bits clear. | |
danilchap
2016/09/14 13:12:09
may be test seperatly:
constexpr uint8_t kFbit = 1
brandtr
2016/09/20 11:13:32
Done.
| |
324 EXPECT_EQ(0x01, packet[8]); // SSRCCount = 1 | |
325 EXPECT_EQ(kMediaSsrc, | |
326 static_cast<uint32_t>((packet[12] << 24) + (packet[13] << 16) + | |
327 (packet[14] << 8) + packet[15])); | |
328 EXPECT_EQ(kMediaStartSeqNum, | |
329 static_cast<uint16_t>((packet[16] << 8) + packet[17])); | |
330 const uint8_t flexfec_packet_mask[] = {0x48, 0x81, 0x82, 0x11, 0x00, 0x21}; | |
331 EXPECT_EQ( | |
332 0, memcmp(flexfec_packet_mask, packet + 18, sizeof(flexfec_packet_mask))); | |
333 } | |
334 | |
335 TEST(FlexfecHeaderWriterTest, CorrectlyFinalizesHeaderWithKBit2Set) { | |
336 const uint8_t ulpfec_packet_mask[] = {0x22, 0x22, 0x44, 0x44, 0x44, 0x41}; | |
337 Packet written_packet; | |
338 written_packet.length = kMediaPacketLength; | |
339 for (size_t i = 0; i < written_packet.length; ++i) { | |
340 written_packet.data[i] = i; | |
341 } | |
342 FlexfecHeaderWriter writer; | |
343 writer.FinalizeFecHeader(kMediaSsrc, kMediaStartSeqNum, ulpfec_packet_mask, | |
344 sizeof(ulpfec_packet_mask), &written_packet); | |
345 | |
346 const uint8_t* packet = written_packet.data; | |
347 EXPECT_EQ(0x00, packet[0] & 0xc0); // F and R bits clear. | |
348 EXPECT_EQ(0x01, packet[8]); // SSRCCount = 1 | |
349 EXPECT_EQ(kMediaSsrc, | |
350 static_cast<uint32_t>((packet[12] << 24) + (packet[13] << 16) + | |
351 (packet[14] << 8) + packet[15])); | |
352 EXPECT_EQ(kMediaStartSeqNum, | |
353 static_cast<uint16_t>((packet[16] << 8) + packet[17])); | |
354 const uint8_t flexfec_packet_mask[] = { | |
355 0x11, 0x11, // K-bit 0 clear. | |
356 0x11, 0x11, 0x11, 0x10, // K-bit 1 clear. | |
357 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 // K-bit 2 set. | |
358 }; | |
359 EXPECT_EQ( | |
360 0, memcmp(flexfec_packet_mask, packet + 18, sizeof(flexfec_packet_mask))); | |
361 } | |
362 | |
363 TEST(FlexfecHeaderWriterTest, ContractsShortUlpfecPacketMaskWithBit15Clear) { | |
364 FlexfecHeaderWriter writer; | |
365 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
366 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
367 ClearBit(15, packet_mask.get()); | |
368 size_t min_packet_mask_size = | |
369 writer.MinPacketMaskSize(packet_mask.get(), packet_mask_size); | |
370 EXPECT_EQ(kFlexfecPacketMaskSizeKBit0Set, min_packet_mask_size); | |
371 EXPECT_EQ(kFlexfecHeaderSizeKBit0Set, | |
372 writer.FecHeaderSize(min_packet_mask_size)); | |
373 } | |
374 | |
375 TEST(FlexfecHeaderWriterTest, ExpandsShortUlpfecPacketMaskWithBit15Set) { | |
376 FlexfecHeaderWriter writer; | |
377 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
378 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
379 SetBit(15, packet_mask.get()); | |
380 size_t min_packet_mask_size = | |
381 writer.MinPacketMaskSize(packet_mask.get(), packet_mask_size); | |
382 EXPECT_EQ(kFlexfecPacketMaskSizeKBit1Set, min_packet_mask_size); | |
383 EXPECT_EQ(kFlexfecHeaderSizeKBit1Set, | |
384 writer.FecHeaderSize(min_packet_mask_size)); | |
385 } | |
386 | |
387 TEST(FlexfecHeaderWriterTest, | |
388 ContractsLongUlpfecPacketMaskWithBits46And47Clear) { | |
389 FlexfecHeaderWriter writer; | |
390 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
391 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
392 ClearBit(46, packet_mask.get()); | |
393 ClearBit(47, packet_mask.get()); | |
394 size_t min_packet_mask_size = | |
395 writer.MinPacketMaskSize(packet_mask.get(), packet_mask_size); | |
396 EXPECT_EQ(kFlexfecPacketMaskSizeKBit1Set, min_packet_mask_size); | |
397 EXPECT_EQ(kFlexfecHeaderSizeKBit1Set, | |
398 writer.FecHeaderSize(min_packet_mask_size)); | |
399 } | |
400 | |
401 TEST(FlexfecHeaderWriterTest, ExpandsLongUlpfecPacketMaskWithBits46And47Clear) { | |
402 FlexfecHeaderWriter writer; | |
403 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
404 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
405 SetBit(46, packet_mask.get()); | |
406 ClearBit(47, packet_mask.get()); | |
407 size_t min_packet_mask_size = | |
408 writer.MinPacketMaskSize(packet_mask.get(), packet_mask_size); | |
409 EXPECT_EQ(kFlexfecPacketMaskSizeKBit2Set, min_packet_mask_size); | |
410 EXPECT_EQ(kFlexfecHeaderSizeKBit2Set, | |
411 writer.FecHeaderSize(min_packet_mask_size)); | |
412 } | |
413 | |
414 TEST(FlexfecHeaderWriterTest, | |
415 ExpandsLongUlpfecPacketMaskWithBit46ClearBit47Set) { | |
416 FlexfecHeaderWriter writer; | |
417 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
418 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
419 ClearBit(46, packet_mask.get()); | |
420 SetBit(47, packet_mask.get()); | |
421 size_t min_packet_mask_size = | |
422 writer.MinPacketMaskSize(packet_mask.get(), packet_mask_size); | |
423 EXPECT_EQ(kFlexfecPacketMaskSizeKBit2Set, min_packet_mask_size); | |
424 EXPECT_EQ(kFlexfecHeaderSizeKBit2Set, | |
425 writer.FecHeaderSize(min_packet_mask_size)); | |
426 } | |
427 | |
428 TEST(FlexfecHeaderWriterTest, ExpandsLongUlpfecPacketMaskWithBits46And47Set) { | |
429 FlexfecHeaderWriter writer; | |
430 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
431 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
432 SetBit(46, packet_mask.get()); | |
433 SetBit(47, packet_mask.get()); | |
434 size_t min_packet_mask_size = | |
435 writer.MinPacketMaskSize(packet_mask.get(), packet_mask_size); | |
436 EXPECT_EQ(kFlexfecPacketMaskSizeKBit2Set, min_packet_mask_size); | |
437 EXPECT_EQ(kFlexfecHeaderSizeKBit2Set, | |
438 writer.FecHeaderSize(min_packet_mask_size)); | |
439 } | |
440 | |
441 TEST(FlexfecHeaderReaderWriterTest, | |
442 WriteAndReadSmallUlpfecPacketHeaderWithMaskBit15Clear) { | |
443 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
444 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
445 ClearBit(15, packet_mask.get()); | |
446 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
447 auto read_packet = ReadHeader(*written_packet); | |
448 VerifyHeaders(kFlexfecHeaderSizeKBit0Set, packet_mask.get(), | |
449 kFlexfecPacketMaskSizeKBit0Set, *written_packet, *read_packet); | |
450 } | |
451 | |
452 TEST(FlexfecHeaderReaderWriterTest, | |
453 WriteAndReadSmallUlpfecPacketHeaderWithMaskBit15Set) { | |
454 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitClear; | |
455 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
456 SetBit(15, packet_mask.get()); | |
457 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
458 auto read_packet = ReadHeader(*written_packet); | |
459 VerifyHeaders(kFlexfecHeaderSizeKBit1Set, packet_mask.get(), | |
460 kFlexfecPacketMaskSizeKBit1Set, *written_packet, *read_packet); | |
461 } | |
462 | |
463 TEST(FlexfecHeaderReaderWriterTest, | |
464 WriteAndReadLargeUlpfecPacketHeaderWithMaskBits46And47Clear) { | |
465 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
466 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
467 ClearBit(46, packet_mask.get()); | |
468 ClearBit(47, packet_mask.get()); | |
469 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
470 auto read_packet = ReadHeader(*written_packet); | |
471 VerifyHeaders(kFlexfecHeaderSizeKBit1Set, packet_mask.get(), | |
472 kFlexfecPacketMaskSizeKBit1Set, *written_packet, *read_packet); | |
473 } | |
474 | |
475 TEST(FlexfecHeaderReaderWriterTest, | |
476 WriteAndReadLargeUlpfecPacketHeaderWithMaskBit46SetBit47Clear) { | |
477 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
478 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
479 SetBit(46, packet_mask.get()); | |
480 ClearBit(47, packet_mask.get()); | |
481 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
482 auto read_packet = ReadHeader(*written_packet); | |
483 VerifyHeaders(kFlexfecHeaderSizeKBit2Set, packet_mask.get(), | |
484 kFlexfecPacketMaskSizeKBit2Set, *written_packet, *read_packet); | |
485 } | |
486 | |
487 TEST(FlexfecHeaderReaderWriterTest, | |
488 WriteAndReadLargeUlpfecPacketHeaderMaskWithBit46ClearBit47Set) { | |
489 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
490 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
491 ClearBit(46, packet_mask.get()); | |
492 SetBit(47, packet_mask.get()); | |
493 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
494 auto read_packet = ReadHeader(*written_packet); | |
495 VerifyHeaders(kFlexfecHeaderSizeKBit2Set, packet_mask.get(), | |
496 kFlexfecPacketMaskSizeKBit2Set, *written_packet, *read_packet); | |
497 } | |
498 | |
499 TEST(FlexfecHeaderReaderWriterTest, | |
500 WriteAndReadLargeUlpfecPacketHeaderWithMaskBits46And47Set) { | |
501 const size_t packet_mask_size = kUlpfecPacketMaskSizeLBitSet; | |
502 auto packet_mask = GeneratePacketMask(packet_mask_size, 0xabcd); | |
503 SetBit(46, packet_mask.get()); | |
504 SetBit(47, packet_mask.get()); | |
505 auto written_packet = WriteHeader(packet_mask.get(), packet_mask_size); | |
506 auto read_packet = ReadHeader(*written_packet); | |
507 VerifyHeaders(kFlexfecHeaderSizeKBit2Set, packet_mask.get(), | |
508 kFlexfecPacketMaskSizeKBit2Set, *written_packet, *read_packet); | |
509 } | |
510 | |
511 } // namespace webrtc | |
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