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
|
/*
* Copyright (c) 2017 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/erl_estimator.h"
#include "test/gtest.h"
namespace webrtc {
namespace {
void VerifyErl(const std::array<float, kFftLengthBy2Plus1>& erl,
float erl_time_domain,
float reference) {
std::for_each(erl.begin(), erl.end(),
[reference](float a) { EXPECT_NEAR(reference, a, 0.001); });
EXPECT_NEAR(reference, erl_time_domain, 0.001);
}
} // namespace
// Verifies that the correct ERL estimates are achieved.
TEST(ErlEstimator, Estimates) {
std::array<float, kFftLengthBy2Plus1> X2;
std::array<float, kFftLengthBy2Plus1> Y2;
ErlEstimator estimator;
// Verifies that the ERL estimate is properly reduced to lower values.
X2.fill(500 * 1000.f * 1000.f);
Y2.fill(10 * X2[0]);
for (size_t k = 0; k < 200; ++k) {
estimator.Update(X2, Y2);
}
VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 10.f);
// Verifies that the ERL is not immediately increased when the ERL in the data
// increases.
Y2.fill(10000 * X2[0]);
for (size_t k = 0; k < 998; ++k) {
estimator.Update(X2, Y2);
}
VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 10.f);
// Verifies that the rate of increase is 3 dB.
estimator.Update(X2, Y2);
VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 20.f);
// Verifies that the maximum ERL is achieved when there are no low RLE
// estimates.
for (size_t k = 0; k < 1000; ++k) {
estimator.Update(X2, Y2);
}
VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 1000.f);
// Verifies that the ERL estimate is is not updated for low-level signals
X2.fill(1000.f * 1000.f);
Y2.fill(10 * X2[0]);
for (size_t k = 0; k < 200; ++k) {
estimator.Update(X2, Y2);
}
VerifyErl(estimator.Erl(), estimator.ErlTimeDomain(), 1000.f);
}
} // namespace webrtc
|
