46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
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/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AEC3_MOVING_AVERAGE_H_
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#define MODULES_AUDIO_PROCESSING_AEC3_MOVING_AVERAGE_H_
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#include <stddef.h>
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#include <vector>
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#include "api/array_view.h"
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namespace webrtc {
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namespace aec3 {
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class MovingAverage {
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public:
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// Creates an instance of MovingAverage that accepts inputs of length num_elem
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// and averages over mem_len inputs.
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MovingAverage(size_t num_elem, size_t mem_len);
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~MovingAverage();
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// Computes the average of input and mem_len-1 previous inputs and stores the
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// result in output.
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void Average(rtc::ArrayView<const float> input, rtc::ArrayView<float> output);
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private:
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const size_t num_elem_;
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const size_t mem_len_;
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const float scaling_;
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std::vector<float> memory_;
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size_t mem_index_;
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};
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} // namespace aec3
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AEC3_MOVING_AVERAGE_H_
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