/*
 *  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/test/echo_canceller_test_tools.h"

#include <algorithm>
#include <cstddef>

#include "api/array_view.h"
#include "rtc_base/checks.h"
#include "rtc_base/random.h"

namespace webrtc {

void RandomizeSampleVector(Random* random_generator, ArrayView<float> v) {
  RandomizeSampleVector(random_generator, v,
                        /*amplitude=*/32767.f);
}

void RandomizeSampleVector(Random* random_generator,
                           ArrayView<float> v,
                           float amplitude) {
  for (auto& v_k : v) {
    v_k = 2 * amplitude * random_generator->Rand<float>() - amplitude;
  }
}

template <typename T>
void DelayBuffer<T>::Delay(ArrayView<const T> x, ArrayView<T> x_delayed) {
  RTC_DCHECK_EQ(x.size(), x_delayed.size());
  if (buffer_.empty()) {
    std::copy(x.begin(), x.end(), x_delayed.begin());
  } else {
    for (size_t k = 0; k < x.size(); ++k) {
      x_delayed[k] = buffer_[next_insert_index_];
      buffer_[next_insert_index_] = x[k];
      next_insert_index_ = (next_insert_index_ + 1) % buffer_.size();
    }
  }
}

template class DelayBuffer<float>;
template class DelayBuffer<int>;
}  // namespace webrtc