1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
/*
* FILE: ts.h
* AUTHORS: Orion Hodson
*
* Copyright (c) 1999-2001 University College London
* All rights reserved.
*
* $Id: ts.h,v 1.17 2002/03/16 01:00:48 ucacoxh Exp $
*/
#ifndef __TS_H__
#define __TS_H__
typedef struct {
uint32_t ticks:26;
uint32_t check:2;
uint32_t idx:4;
} timestamp_t;
/* Maps a 32 bit unsigned integer into a valid timestamp.
* This be used for mapping offsets, not timestamps (see
* below) */
timestamp_t ts_map32(uint32_t freq, uint32_t ts32);
/* Common Operations */
timestamp_t ts_add (timestamp_t ts1, timestamp_t ts2);
timestamp_t ts_sub (timestamp_t ts1, timestamp_t ts2);
timestamp_t ts_abs_diff (timestamp_t ts1, timestamp_t ts2);
/* Operations for use on offets, i.e. small ts values */
timestamp_t ts_mul (timestamp_t ts, uint32_t x);
timestamp_t ts_div (timestamp_t ts, uint32_t x);
/* ts_gt = timestamp greater than */
int ts_gt(timestamp_t t1, timestamp_t t2);
int ts_eq(timestamp_t t1, timestamp_t t2);
/* ts_convert changes timebase of a timestamp */
timestamp_t ts_convert(uint32_t new_freq, timestamp_t ts);
/* Conversion to milliseconds */
uint32_t timestamp_to_ms(timestamp_t t1);
/* Conversion to microseconds */
uint32_t timestamp_to_us(timestamp_t t1);
/* Debugging functions */
int ts_valid(timestamp_t t1);
uint32_t ts_get_freq(timestamp_t t1);
typedef struct {
timestamp_t last_ts;
uint32_t last_32;
uint32_t freq;
} ts_sequencer;
/* These functions should be used for mapping sequences of
* 32 bit timestamps to timestamp_t and vice-versa.
*/
timestamp_t ts_seq32_in (ts_sequencer *s, uint32_t f, uint32_t curr_32);
uint32_t ts_seq32_out (ts_sequencer *s, uint32_t f, timestamp_t curr_ts);
#endif
|
