| /* |
| * Copyright 2016 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 WEBRTC_MODULES_AUDIO_PROCESSING_UTILITY_BLOCK_MEAN_CALCULATOR_H_ |
| #define WEBRTC_MODULES_AUDIO_PROCESSING_UTILITY_BLOCK_MEAN_CALCULATOR_H_ |
| |
| #include <stddef.h> |
| |
| #include "webrtc/base/constructormagic.h" |
| |
| namespace webrtc { |
| |
| // BlockMeanCalculator calculates the mean of a block of values. Values are |
| // added one after another, and the mean is updated at the end of every block. |
| class BlockMeanCalculator { |
| public: |
| explicit BlockMeanCalculator(size_t block_length); |
| |
| // Reset. |
| void Reset(); |
| |
| // Add one value to the sequence. |
| void AddValue(float value); |
| |
| // Return whether the latest added value was at the end of a block. |
| bool EndOfBlock() const; |
| |
| // Return the latest mean. |
| float GetLatestMean() const; |
| |
| private: |
| // Clear all values added. |
| void Clear(); |
| |
| const size_t block_length_; |
| size_t count_; |
| float sum_; |
| float mean_; |
| |
| RTC_DISALLOW_COPY_AND_ASSIGN(BlockMeanCalculator); |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_AUDIO_PROCESSING_UTILITY_BLOCK_MEAN_CALCULATOR_H_ |