chromium/third_party/webrtc/modules/audio_processing/agc2/rnn_vad/symmetric_matrix_buffer.h

/*
 *  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.
 */

#ifndef MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_SYMMETRIC_MATRIX_BUFFER_H_
#define MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_SYMMETRIC_MATRIX_BUFFER_H_

#include <algorithm>
#include <array>
#include <cstring>
#include <utility>

#include "api/array_view.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_compare.h"

namespace webrtc {
namespace rnn_vad {

// Data structure to buffer the results of pair-wise comparisons between items
// stored in a ring buffer. Every time that the oldest item is replaced in the
// ring buffer, the new one is compared to the remaining items in the ring
// buffer. The results of such comparisons need to be buffered and automatically
// removed when one of the two corresponding items that have been compared is
// removed from the ring buffer. It is assumed that the comparison is symmetric
// and that comparing an item with itself is not needed.
template <typename T, int S>
class SymmetricMatrixBuffer { … };

}  // namespace rnn_vad
}  // namespace webrtc

#endif  // MODULES_AUDIO_PROCESSING_AGC2_RNN_VAD_SYMMETRIC_MATRIX_BUFFER_H_