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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
/*
* Copyright (c) 2018 The WebRTC 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 "modules/audio_processing/aec3/signal_dependent_erle_estimator.h"
#include <algorithm>
#include <iostream>
#include <string>
#include "api/audio/echo_canceller3_config.h"
#include "modules/audio_processing/aec3/render_buffer.h"
#include "modules/audio_processing/aec3/render_delay_buffer.h"
#include "rtc_base/strings/string_builder.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
void GetActiveFrame(std::vector<std::vector<std::vector<float>>>* x) {
const std::array<float, kBlockSize> frame = {
7459.88, 17209.6, 17383, 20768.9, 16816.7, 18386.3, 4492.83, 9675.85,
6665.52, 14808.6, 9342.3, 7483.28, 19261.7, 4145.98, 1622.18, 13475.2,
7166.32, 6856.61, 21937, 7263.14, 9569.07, 14919, 8413.32, 7551.89,
7848.65, 6011.27, 13080.6, 15865.2, 12656, 17459.6, 4263.93, 4503.03,
9311.79, 21095.8, 12657.9, 13906.6, 19267.2, 11338.1, 16828.9, 11501.6,
11405, 15031.4, 14541.6, 19765.5, 18346.3, 19350.2, 3157.47, 18095.8,
1743.68, 21328.2, 19727.5, 7295.16, 10332.4, 11055.5, 20107.4, 14708.4,
12416.2, 16434, 2454.69, 9840.8, 6867.23, 1615.75, 6059.9, 8394.19};
for (size_t band = 0; band < x->size(); ++band) {
for (size_t channel = 0; channel < (*x)[band].size(); ++channel) {
RTC_DCHECK_GE((*x)[band][channel].size(), frame.size());
std::copy(frame.begin(), frame.end(), (*x)[band][channel].begin());
}
}
}
class TestInputs {
public:
explicit TestInputs(const EchoCanceller3Config& cfg);
~TestInputs();
const RenderBuffer& GetRenderBuffer() { return *render_buffer_; }
rtc::ArrayView<const float> GetX2() { return X2_; }
rtc::ArrayView<const float> GetY2() { return Y2_; }
rtc::ArrayView<const float> GetE2() { return E2_; }
std::vector<std::array<float, kFftLengthBy2Plus1>> GetH2() { return H2_; }
void Update();
private:
void UpdateCurrentPowerSpectra();
int n_ = 0;
std::unique_ptr<RenderDelayBuffer> render_delay_buffer_;
RenderBuffer* render_buffer_;
std::array<float, kFftLengthBy2Plus1> X2_;
std::array<float, kFftLengthBy2Plus1> Y2_;
std::array<float, kFftLengthBy2Plus1> E2_;
std::vector<std::array<float, kFftLengthBy2Plus1>> H2_;
std::vector<std::vector<std::vector<float>>> x_;
};
TestInputs::TestInputs(const EchoCanceller3Config& cfg)
: render_delay_buffer_(RenderDelayBuffer::Create(cfg, 16000, 1)),
H2_(cfg.filter.main.length_blocks),
x_(1,
std::vector<std::vector<float>>(1,
std::vector<float>(kBlockSize, 0.f))) {
render_delay_buffer_->AlignFromDelay(4);
render_buffer_ = render_delay_buffer_->GetRenderBuffer();
for (auto& H : H2_) {
H.fill(0.f);
}
H2_[0].fill(1.0f);
}
TestInputs::~TestInputs() = default;
void TestInputs::Update() {
if (n_ % 2 == 0) {
std::fill(x_[0][0].begin(), x_[0][0].end(), 0.f);
} else {
GetActiveFrame(&x_);
}
render_delay_buffer_->Insert(x_);
render_delay_buffer_->PrepareCaptureProcessing();
UpdateCurrentPowerSpectra();
++n_;
}
void TestInputs::UpdateCurrentPowerSpectra() {
const SpectrumBuffer& spectrum_render_buffer =
render_buffer_->GetSpectrumBuffer();
size_t idx = render_buffer_->Position();
size_t prev_idx = spectrum_render_buffer.OffsetIndex(idx, 1);
auto& X2 = spectrum_render_buffer.buffer[idx][/*channel=*/0];
auto& X2_prev = spectrum_render_buffer.buffer[prev_idx][/*channel=*/0];
std::copy(X2.begin(), X2.end(), X2_.begin());
RTC_DCHECK_EQ(X2.size(), Y2_.size());
for (size_t k = 0; k < X2.size(); ++k) {
E2_[k] = 0.01f * X2_prev[k];
Y2_[k] = X2[k] + E2_[k];
}
}
} // namespace
TEST(SignalDependentErleEstimator, SweepSettings) {
const size_t kNumCaptureChannels = 1;
EchoCanceller3Config cfg;
size_t max_length_blocks = 50;
for (size_t blocks = 0; blocks < max_length_blocks; blocks = blocks + 10) {
for (size_t delay_headroom = 0; delay_headroom < 5; ++delay_headroom) {
for (size_t num_sections = 2; num_sections < max_length_blocks;
++num_sections) {
cfg.filter.main.length_blocks = blocks;
cfg.filter.main_initial.length_blocks =
std::min(cfg.filter.main_initial.length_blocks, blocks);
cfg.delay.delay_headroom_samples = delay_headroom * kBlockSize;
cfg.erle.num_sections = num_sections;
if (EchoCanceller3Config::Validate(&cfg)) {
SignalDependentErleEstimator s(cfg, kNumCaptureChannels);
std::array<std::array<float, kFftLengthBy2Plus1>, kNumCaptureChannels>
average_erle;
for (auto& e : average_erle) {
e.fill(cfg.erle.max_l);
}
TestInputs inputs(cfg);
for (size_t n = 0; n < 10; ++n) {
inputs.Update();
s.Update(inputs.GetRenderBuffer(), inputs.GetH2(), inputs.GetX2(),
inputs.GetY2(), inputs.GetE2(), average_erle, true);
}
}
}
}
}
}
TEST(SignalDependentErleEstimator, LongerRun) {
const size_t kNumCaptureChannels = 1;
EchoCanceller3Config cfg;
cfg.filter.main.length_blocks = 2;
cfg.filter.main_initial.length_blocks = 1;
cfg.delay.delay_headroom_samples = 0;
cfg.delay.hysteresis_limit_blocks = 0;
cfg.erle.num_sections = 2;
EXPECT_EQ(EchoCanceller3Config::Validate(&cfg), true);
std::array<std::array<float, kFftLengthBy2Plus1>, kNumCaptureChannels>
average_erle;
for (auto& e : average_erle) {
e.fill(cfg.erle.max_l);
}
SignalDependentErleEstimator s(cfg, kNumCaptureChannels);
TestInputs inputs(cfg);
for (size_t n = 0; n < 200; ++n) {
inputs.Update();
s.Update(inputs.GetRenderBuffer(), inputs.GetH2(), inputs.GetX2(),
inputs.GetY2(), inputs.GetE2(), average_erle, true);
}
}
} // namespace webrtc
|
