1 /*
2 * Copyright (c) 2017 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_processing/test/echo_canceller_test_tools.h"
12
13 #include "rtc_base/checks.h"
14
15 namespace webrtc {
16
RandomizeSampleVector(Random * random_generator,rtc::ArrayView<float> v)17 void RandomizeSampleVector(Random* random_generator, rtc::ArrayView<float> v) {
18 RandomizeSampleVector(random_generator, v,
19 /*amplitude=*/32767.f);
20 }
21
RandomizeSampleVector(Random * random_generator,rtc::ArrayView<float> v,float amplitude)22 void RandomizeSampleVector(Random* random_generator,
23 rtc::ArrayView<float> v,
24 float amplitude) {
25 for (auto& v_k : v) {
26 v_k = 2 * amplitude * random_generator->Rand<float>() - amplitude;
27 }
28 }
29
30 template <typename T>
Delay(rtc::ArrayView<const T> x,rtc::ArrayView<T> x_delayed)31 void DelayBuffer<T>::Delay(rtc::ArrayView<const T> x,
32 rtc::ArrayView<T> x_delayed) {
33 RTC_DCHECK_EQ(x.size(), x_delayed.size());
34 if (buffer_.empty()) {
35 std::copy(x.begin(), x.end(), x_delayed.begin());
36 } else {
37 for (size_t k = 0; k < x.size(); ++k) {
38 x_delayed[k] = buffer_[next_insert_index_];
39 buffer_[next_insert_index_] = x[k];
40 next_insert_index_ = (next_insert_index_ + 1) % buffer_.size();
41 }
42 }
43 }
44
45 template class DelayBuffer<float>;
46 template class DelayBuffer<int>;
47 } // namespace webrtc
48