| 1 | /* |
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| 2 | This file is part of the KDE Baloo Project |
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| 3 | SPDX-FileCopyrightText: 2015 Pinak Ahuja <pinak.ahuja@gmail.com> |
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| 4 | |
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| 5 | SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef BALOO_TIMEESTIMATOR_H |
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| 9 | #define BALOO_TIMEESTIMATOR_H |
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| 10 | |
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| 11 | #define BUFFER_SIZE 5 |
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| 12 | |
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| 13 | #include <QAtomicInteger> |
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| 14 | |
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| 15 | namespace Baloo { |
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| 16 | /* |
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| 17 | * This class handles the time estimation logic for filecontentindexer. |
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| 18 | * Time estimations use a weighted moving average of the time taken by |
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| 19 | * 5 most recent batches. The more recent the batch is, higher the weight |
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| 20 | * it will be assigned. |
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| 21 | */ |
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| 22 | |
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| 23 | class TimeEstimator |
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| 24 | { |
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| 25 | public: |
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| 26 | TimeEstimator(); |
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| 27 | uint calculateTimeLeft() const; |
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| 28 | |
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| 29 | void setProgress(uint remainingCount) |
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| 30 | { |
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| 31 | m_remainingCount.storeRelaxed(newValue: remainingCount); |
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| 32 | } |
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| 33 | void handleNewBatchTime(uint time, uint batchSize); |
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| 34 | |
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| 35 | private: |
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| 36 | float m_batchTimeBuffer[BUFFER_SIZE]; |
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| 37 | |
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| 38 | int m_bufferIndex = 0; |
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| 39 | bool m_estimateReady = false; |
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| 40 | |
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| 41 | QAtomicInteger<uint> m_remainingCount = 0; |
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| 42 | }; |
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| 43 | |
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| 44 | } |
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| 45 | |
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| 46 | #endif //BALOO_TIMEESTIMATOR_H |
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| 47 | |
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