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/*
* 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.
*/
#ifndef MODULES_AUDIO_PROCESSING_TEST_ECHO_CANCELLER_TEST_TOOLS_H_
#define MODULES_AUDIO_PROCESSING_TEST_ECHO_CANCELLER_TEST_TOOLS_H_
#include <algorithm>
#include <vector>
#include "api/array_view.h"
#include "rtc_base/random.h"
namespace webrtc {
// Randomizes the elements in a vector with values -32767.f:32767.f.
void RandomizeSampleVector(Random* random_generator, rtc::ArrayView<float> v);
// Randomizes the elements in a vector with values -amplitude:amplitude.
void RandomizeSampleVector(Random* random_generator,
rtc::ArrayView<float> v,
float amplitude);
// Class for delaying a signal a fixed number of samples.
template <typename T>
class DelayBuffer {
public:
explicit DelayBuffer(size_t delay) : buffer_(delay) {}
~DelayBuffer() = default;
// Produces a delayed signal copy of x.
void Delay(rtc::ArrayView<const T> x, rtc::ArrayView<T> x_delayed);
private:
std::vector<T> buffer_;
size_t next_insert_index_ = 0;
};
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_TEST_ECHO_CANCELLER_TEST_TOOLS_H_
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