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 // Unit tests for Normal class.
12
13 #include "modules/audio_coding/neteq/normal.h"
14
15 #include <memory>
16 #include <vector>
17
18 #include "common_audio/signal_processing/include/signal_processing_library.h"
19 #include "modules/audio_coding/neteq/audio_multi_vector.h"
20 #include "modules/audio_coding/neteq/background_noise.h"
21 #include "modules/audio_coding/neteq/expand.h"
22 #include "modules/audio_coding/neteq/mock/mock_decoder_database.h"
23 #include "modules/audio_coding/neteq/mock/mock_expand.h"
24 #include "modules/audio_coding/neteq/random_vector.h"
25 #include "modules/audio_coding/neteq/statistics_calculator.h"
26 #include "modules/audio_coding/neteq/sync_buffer.h"
27 #include "test/gtest.h"
28
29 using ::testing::_;
30 using ::testing::Invoke;
31
32 namespace webrtc {
33
34 namespace {
35
ExpandProcess120ms(AudioMultiVector * output)36 int ExpandProcess120ms(AudioMultiVector* output) {
37 AudioMultiVector dummy_audio(1, 11520u);
38 dummy_audio.CopyTo(output);
39 return 0;
40 }
41
42 } // namespace
43
TEST(Normal,CreateAndDestroy)44 TEST(Normal, CreateAndDestroy) {
45 MockDecoderDatabase db;
46 int fs = 8000;
47 size_t channels = 1;
48 BackgroundNoise bgn(channels);
49 SyncBuffer sync_buffer(1, 1000);
50 RandomVector random_vector;
51 StatisticsCalculator statistics;
52 Expand expand(&bgn, &sync_buffer, &random_vector, &statistics, fs, channels);
53 Normal normal(fs, &db, bgn, &expand, &statistics);
54 EXPECT_CALL(db, Die()); // Called when |db| goes out of scope.
55 }
56
TEST(Normal,AvoidDivideByZero)57 TEST(Normal, AvoidDivideByZero) {
58 MockDecoderDatabase db;
59 int fs = 8000;
60 size_t channels = 1;
61 BackgroundNoise bgn(channels);
62 SyncBuffer sync_buffer(1, 1000);
63 RandomVector random_vector;
64 StatisticsCalculator statistics;
65 MockExpand expand(&bgn, &sync_buffer, &random_vector, &statistics, fs,
66 channels);
67 Normal normal(fs, &db, bgn, &expand, &statistics);
68
69 int16_t input[1000] = {0};
70 AudioMultiVector output(channels);
71
72 // Zero input length.
73 EXPECT_EQ(0, normal.Process(input, 0, NetEq::Mode::kExpand, &output));
74 EXPECT_EQ(0u, output.Size());
75
76 // Try to make energy_length >> scaling = 0;
77 EXPECT_CALL(expand, SetParametersForNormalAfterExpand());
78 EXPECT_CALL(expand, Process(_));
79 EXPECT_CALL(expand, Reset());
80 // If input_size_samples < 64, then energy_length in Normal::Process() will
81 // be equal to input_size_samples. Since the input is all zeros, decoded_max
82 // will be zero, and scaling will be >= 6. Thus, energy_length >> scaling = 0,
83 // and using this as a denominator would lead to problems.
84 int input_size_samples = 63;
85 EXPECT_EQ(input_size_samples, normal.Process(input, input_size_samples,
86 NetEq::Mode::kExpand, &output));
87
88 EXPECT_CALL(db, Die()); // Called when |db| goes out of scope.
89 EXPECT_CALL(expand, Die()); // Called when |expand| goes out of scope.
90 }
91
TEST(Normal,InputLengthAndChannelsDoNotMatch)92 TEST(Normal, InputLengthAndChannelsDoNotMatch) {
93 MockDecoderDatabase db;
94 int fs = 8000;
95 size_t channels = 2;
96 BackgroundNoise bgn(channels);
97 SyncBuffer sync_buffer(channels, 1000);
98 RandomVector random_vector;
99 StatisticsCalculator statistics;
100 MockExpand expand(&bgn, &sync_buffer, &random_vector, &statistics, fs,
101 channels);
102 Normal normal(fs, &db, bgn, &expand, &statistics);
103
104 int16_t input[1000] = {0};
105 AudioMultiVector output(channels);
106
107 // Let the number of samples be one sample less than 80 samples per channel.
108 size_t input_len = 80 * channels - 1;
109 EXPECT_EQ(0, normal.Process(input, input_len, NetEq::Mode::kExpand, &output));
110 EXPECT_EQ(0u, output.Size());
111
112 EXPECT_CALL(db, Die()); // Called when |db| goes out of scope.
113 EXPECT_CALL(expand, Die()); // Called when |expand| goes out of scope.
114 }
115
TEST(Normal,LastModeExpand120msPacket)116 TEST(Normal, LastModeExpand120msPacket) {
117 MockDecoderDatabase db;
118 const int kFs = 48000;
119 const size_t kPacketsizeBytes = 11520u;
120 const size_t kChannels = 1;
121 BackgroundNoise bgn(kChannels);
122 SyncBuffer sync_buffer(kChannels, 1000);
123 RandomVector random_vector;
124 StatisticsCalculator statistics;
125 MockExpand expand(&bgn, &sync_buffer, &random_vector, &statistics, kFs,
126 kChannels);
127 Normal normal(kFs, &db, bgn, &expand, &statistics);
128
129 int16_t input[kPacketsizeBytes] = {0};
130 AudioMultiVector output(kChannels);
131
132 EXPECT_CALL(expand, SetParametersForNormalAfterExpand());
133 EXPECT_CALL(expand, Process(_)).WillOnce(Invoke(ExpandProcess120ms));
134 EXPECT_CALL(expand, Reset());
135 EXPECT_EQ(
136 static_cast<int>(kPacketsizeBytes),
137 normal.Process(input, kPacketsizeBytes, NetEq::Mode::kExpand, &output));
138
139 EXPECT_EQ(kPacketsizeBytes, output.Size());
140
141 EXPECT_CALL(db, Die()); // Called when |db| goes out of scope.
142 EXPECT_CALL(expand, Die()); // Called when |expand| goes out of scope.
143 }
144
145 // TODO(hlundin): Write more tests.
146
147 } // namespace webrtc
148