Libav
adler32.c
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <string.h>
20 
21 #include "libavutil/log.h"
22 #include "libavutil/timer.h"
23 #include "libavutil/adler32.h"
24 
25 #define LEN 7001
26 
27 static volatile int checksum;
28 
29 int main(int argc, char **argv)
30 {
31  int i;
32  char data[LEN];
33 
35 
36  for (i = 0; i < LEN; i++)
37  data[i] = ((i * i) >> 3) + 123 * i;
38 
39  if (argc > 1 && !strcmp(argv[1], "-t")) {
40  for (i = 0; i < 1000; i++) {
42  checksum = av_adler32_update(1, data, LEN);
43  STOP_TIMER("adler");
44  }
45  } else {
46  checksum = av_adler32_update(1, data, LEN);
47  }
48 
49  av_log(NULL, AV_LOG_DEBUG, "%X (expected 50E6E508)\n", checksum);
50  return checksum == 0x50e6e508 ? 0 : 1;
51 }
#define LEN
Definition: adler32.c:25
void av_log_set_level(int level)
Set the log level.
Definition: log.c:205
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
unsigned long av_adler32_update(unsigned long adler, const uint8_t *buf, unsigned int len)
Calculate the Adler32 checksum of a buffer.
Definition: adler32.c:42
const char data[16]
Definition: mxf.c:70
high precision timer, useful to profile code
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:145
static volatile int checksum
Definition: adler32.c:27
Public header for libavutil Adler32 hasher.
NULL
Definition: eval.c:55
#define START_TIMER
Definition: timer.h:86
int main(int argc, char **argv)
Definition: adler32.c:29
#define STOP_TIMER(id)
Definition: timer.h:87