59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/*
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* Copyright (C) 2016 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef TIME_H_
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#define TIME_H_
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define NUM_TIME_SYNC_DATAPOINTS 16
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typedef struct {
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uint64_t time1[NUM_TIME_SYNC_DATAPOINTS];
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uint64_t time2[NUM_TIME_SYNC_DATAPOINTS];
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size_t n;
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size_t i;
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uint64_t time1_base;
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uint64_t time2_base;
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bool estimate_valid;
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float alpha, beta;
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uint8_t hold_count;
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} time_sync_t;
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void time_sync_reset(time_sync_t *sync);
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bool time_sync_init(time_sync_t *sync);
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void time_sync_truncate(time_sync_t *sync, size_t window_size);
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bool time_sync_add(time_sync_t *sync, uint64_t time1, uint64_t time2);
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bool time_sync_estimate_time1(time_sync_t *sync, uint64_t time2, uint64_t *time1);
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void time_sync_hold(time_sync_t *sync, uint8_t count);
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#ifdef __cplusplus
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}
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#endif
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#endif // TIME_H_
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