FFmpeg
libavutil
timestamp.c
Go to the documentation of this file.
1
/*
2
* This file is part of FFmpeg.
3
*
4
* FFmpeg is free software; you can redistribute it and/or
5
* modify it under the terms of the GNU Lesser General Public
6
* License as published by the Free Software Foundation; either
7
* version 2.1 of the License, or (at your option) any later version.
8
*
9
* FFmpeg is distributed in the hope that it will be useful,
10
* but WITHOUT ANY WARRANTY; without even the implied warranty of
11
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12
* Lesser General Public License for more details.
13
*
14
* You should have received a copy of the GNU Lesser General Public
15
* License along with FFmpeg; if not, write to the Free Software
16
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17
*/
18
19
#include "
timestamp.h
"
20
21
char
*
av_ts_make_time_string2
(
char
*buf,
int64_t
ts,
AVRational
tb)
22
{
23
if
(ts ==
AV_NOPTS_VALUE
) {
24
snprintf
(buf,
AV_TS_MAX_STRING_SIZE
,
"NOPTS"
);
25
}
else
{
26
double
val
=
av_q2d
(tb) * ts;
27
double
log
= (fpclassify(
val
) == FP_ZERO ? -
INFINITY
:
floor
(log10(
fabs
(
val
))));
28
int
precision = (
isfinite
(
log
) &&
log
< 0) ? -
log
+ 5 : 6;
29
int
last =
snprintf
(buf,
AV_TS_MAX_STRING_SIZE
,
"%.*f"
, precision,
val
);
30
last =
FFMIN
(last,
AV_TS_MAX_STRING_SIZE
- 1) - 1;
31
for
(; last && buf[last] ==
'0'
; last--);
32
for
(; last && buf[last] !=
'f'
&& (buf[last] <
'0'
|| buf[0] >
'9'
); last--);
33
buf[last + 1] =
'\0'
;
34
}
35
return
buf;
36
}
INFINITY
#define INFINITY
Definition:
mathematics.h:118
int64_t
long long int64_t
Definition:
coverity.c:34
normalize.log
log
Definition:
normalize.py:21
av_ts_make_time_string2
char * av_ts_make_time_string2(char *buf, int64_t ts, AVRational tb)
Fill the provided buffer with a string containing a timestamp time representation.
Definition:
timestamp.c:21
val
static double val(void *priv, double ch)
Definition:
aeval.c:77
floor
static __device__ float floor(float a)
Definition:
cuda_runtime.h:173
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition:
rational.h:104
isfinite
#define isfinite(x)
Definition:
libm.h:359
fabs
static __device__ float fabs(float a)
Definition:
cuda_runtime.h:182
AVRational
Rational number (pair of numerator and denominator).
Definition:
rational.h:58
AV_NOPTS_VALUE
#define AV_NOPTS_VALUE
Undefined timestamp value.
Definition:
avutil.h:248
FFMIN
#define FFMIN(a, b)
Definition:
macros.h:49
AV_TS_MAX_STRING_SIZE
#define AV_TS_MAX_STRING_SIZE
Definition:
timestamp.h:33
timestamp.h
snprintf
#define snprintf
Definition:
snprintf.h:34
Generated on Sat Oct 5 2024 19:22:52 for FFmpeg by
1.8.17