1 /*
2 * Copyright (c) 2012 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 "modules/audio_coding/test/TestRedFec.h"
12
13 #include <memory>
14 #include <utility>
15
16 #include "absl/strings/match.h"
17 #include "api/audio_codecs/L16/audio_decoder_L16.h"
18 #include "api/audio_codecs/L16/audio_encoder_L16.h"
19 #include "api/audio_codecs/audio_decoder_factory_template.h"
20 #include "api/audio_codecs/audio_encoder_factory_template.h"
21 #include "api/audio_codecs/g711/audio_decoder_g711.h"
22 #include "api/audio_codecs/g711/audio_encoder_g711.h"
23 #include "api/audio_codecs/g722/audio_decoder_g722.h"
24 #include "api/audio_codecs/g722/audio_encoder_g722.h"
25 #include "api/audio_codecs/opus/audio_decoder_opus.h"
26 #include "api/audio_codecs/opus/audio_encoder_opus.h"
27 #include "modules/audio_coding/codecs/cng/audio_encoder_cng.h"
28 #include "modules/audio_coding/codecs/red/audio_encoder_copy_red.h"
29 #include "modules/audio_coding/include/audio_coding_module_typedefs.h"
30 #include "rtc_base/strings/string_builder.h"
31 #include "test/gtest.h"
32 #include "test/testsupport/file_utils.h"
33
34 namespace webrtc {
35
TestRedFec()36 TestRedFec::TestRedFec()
37 : encoder_factory_(CreateAudioEncoderFactory<AudioEncoderG711,
38 AudioEncoderG722,
39 AudioEncoderL16,
40 AudioEncoderOpus>()),
41 decoder_factory_(CreateAudioDecoderFactory<AudioDecoderG711,
42 AudioDecoderG722,
43 AudioDecoderL16,
44 AudioDecoderOpus>()),
45 _acmA(AudioCodingModule::Create(
46 AudioCodingModule::Config(decoder_factory_))),
47 _acmB(AudioCodingModule::Create(
48 AudioCodingModule::Config(decoder_factory_))),
49 _channelA2B(NULL),
50 _testCntr(0) {}
51
~TestRedFec()52 TestRedFec::~TestRedFec() {
53 if (_channelA2B != NULL) {
54 delete _channelA2B;
55 _channelA2B = NULL;
56 }
57 }
58
Perform()59 void TestRedFec::Perform() {
60 const std::string file_name =
61 webrtc::test::ResourcePath("audio_coding/testfile32kHz", "pcm");
62 _inFileA.Open(file_name, 32000, "rb");
63
64 ASSERT_EQ(0, _acmA->InitializeReceiver());
65 ASSERT_EQ(0, _acmB->InitializeReceiver());
66
67 // Create and connect the channel
68 _channelA2B = new Channel;
69 _acmA->RegisterTransportCallback(_channelA2B);
70 _channelA2B->RegisterReceiverACM(_acmB.get());
71
72 RegisterSendCodec(_acmA, {"L16", 8000, 1}, Vad::kVadAggressive, true);
73
74 OpenOutFile(_testCntr);
75 Run();
76 _outFileB.Close();
77
78 // Switch to another 8 kHz codec; RED should remain switched on.
79 RegisterSendCodec(_acmA, {"PCMU", 8000, 1}, Vad::kVadAggressive, true);
80 OpenOutFile(_testCntr);
81 Run();
82 _outFileB.Close();
83
84 // Switch to a 16 kHz codec; RED should be switched off.
85 RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
86
87 OpenOutFile(_testCntr);
88 RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
89 Run();
90 RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
91 Run();
92 _outFileB.Close();
93
94 _channelA2B->SetFECTestWithPacketLoss(true);
95 // Following tests are under packet losses.
96
97 // Switch to a 16 kHz codec; RED should be switched off.
98 RegisterSendCodec(_acmA, {"G722", 8000, 1}, Vad::kVadAggressive, false);
99
100 OpenOutFile(_testCntr);
101 Run();
102 _outFileB.Close();
103
104 RegisterSendCodec(_acmA, {"opus", 48000, 2}, absl::nullopt, false);
105
106 // _channelA2B imposes 25% packet loss rate.
107 EXPECT_EQ(0, _acmA->SetPacketLossRate(25));
108
109 _acmA->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* enc) {
110 EXPECT_EQ(true, (*enc)->SetFec(true));
111 });
112
113 OpenOutFile(_testCntr);
114 Run();
115
116 // Switch to L16 with RED.
117 RegisterSendCodec(_acmA, {"L16", 8000, 1}, absl::nullopt, true);
118 Run();
119
120 // Switch to Opus again.
121 RegisterSendCodec(_acmA, {"opus", 48000, 2}, absl::nullopt, false);
122 _acmA->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* enc) {
123 EXPECT_EQ(true, (*enc)->SetFec(false));
124 });
125 Run();
126
127 _acmA->ModifyEncoder([&](std::unique_ptr<AudioEncoder>* enc) {
128 EXPECT_EQ(true, (*enc)->SetFec(true));
129 });
130 _outFileB.Close();
131 }
132
RegisterSendCodec(const std::unique_ptr<AudioCodingModule> & acm,const SdpAudioFormat & codec_format,absl::optional<Vad::Aggressiveness> vad_mode,bool use_red)133 void TestRedFec::RegisterSendCodec(
134 const std::unique_ptr<AudioCodingModule>& acm,
135 const SdpAudioFormat& codec_format,
136 absl::optional<Vad::Aggressiveness> vad_mode,
137 bool use_red) {
138 constexpr int payload_type = 17, cn_payload_type = 27, red_payload_type = 37;
139 const auto& other_acm = &acm == &_acmA ? _acmB : _acmA;
140
141 auto encoder = encoder_factory_->MakeAudioEncoder(payload_type, codec_format,
142 absl::nullopt);
143 EXPECT_NE(encoder, nullptr);
144 std::map<int, SdpAudioFormat> receive_codecs = {{payload_type, codec_format}};
145 if (!absl::EqualsIgnoreCase(codec_format.name, "opus")) {
146 if (vad_mode.has_value()) {
147 AudioEncoderCngConfig config;
148 config.speech_encoder = std::move(encoder);
149 config.num_channels = 1;
150 config.payload_type = cn_payload_type;
151 config.vad_mode = vad_mode.value();
152 encoder = CreateComfortNoiseEncoder(std::move(config));
153 receive_codecs.emplace(std::make_pair(
154 cn_payload_type, SdpAudioFormat("CN", codec_format.clockrate_hz, 1)));
155 }
156 if (use_red) {
157 AudioEncoderCopyRed::Config config;
158 config.payload_type = red_payload_type;
159 config.speech_encoder = std::move(encoder);
160 encoder = std::make_unique<AudioEncoderCopyRed>(std::move(config),
161 field_trials_);
162 receive_codecs.emplace(
163 std::make_pair(red_payload_type,
164 SdpAudioFormat("red", codec_format.clockrate_hz, 1)));
165 }
166 }
167 acm->SetEncoder(std::move(encoder));
168 other_acm->SetReceiveCodecs(receive_codecs);
169 }
170
Run()171 void TestRedFec::Run() {
172 AudioFrame audioFrame;
173 int32_t outFreqHzB = _outFileB.SamplingFrequency();
174 // Set test length to 500 ms (50 blocks of 10 ms each).
175 _inFileA.SetNum10MsBlocksToRead(50);
176 // Fast-forward 1 second (100 blocks) since the file starts with silence.
177 _inFileA.FastForward(100);
178
179 while (!_inFileA.EndOfFile()) {
180 EXPECT_GT(_inFileA.Read10MsData(audioFrame), 0);
181 EXPECT_GE(_acmA->Add10MsData(audioFrame), 0);
182 bool muted;
183 EXPECT_EQ(0, _acmB->PlayoutData10Ms(outFreqHzB, &audioFrame, &muted));
184 ASSERT_FALSE(muted);
185 _outFileB.Write10MsData(audioFrame.data(), audioFrame.samples_per_channel_);
186 }
187 _inFileA.Rewind();
188 }
189
OpenOutFile(int16_t test_number)190 void TestRedFec::OpenOutFile(int16_t test_number) {
191 std::string file_name;
192 rtc::StringBuilder file_stream;
193 file_stream << webrtc::test::OutputPath();
194 file_stream << "TestRedFec_outFile_";
195 file_stream << test_number << ".pcm";
196 file_name = file_stream.str();
197 _outFileB.Open(file_name, 16000, "wb");
198 }
199
200 } // namespace webrtc
201