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
|
/* SPDX-License-Identifier: GPL-2.0-only */
#include <stdlib.h>
#include <stdio.h>
#include "jpeg.h"
const int depth = 16;
int main(int argc, char **argv)
{
FILE *f = fopen(argv[1], "rb");
unsigned long len;
if (!f)
return 1;
if (fseek(f, 0, SEEK_END) != 0)
return 1;
len = ftell(f);
if (fseek(f, 0, SEEK_SET) != 0)
return 1;
unsigned char *buf = malloc(len);
if (fread(buf, len, 1, f) != 1)
return 1;
fclose(f);
unsigned int width;
unsigned int height;
if (jpeg_fetch_size(buf, len, &width, &height) != 0) {
return 1;
}
if ((width > 6000) || (height > 6000)) {
// infeasible data set
return 1;
}
//printf("width: %d, height: %d\n", width, height);
unsigned char *pic = malloc(depth / 8 * width * height);
int ret = jpeg_decode(buf, len, pic, width, height, width * depth / 8, depth);
//printf("ret: %x\n", ret);
return ret;
}
|
