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
|
// Simple tool to roughly evaluate the quality encoding of a webp bitstream
//
// Result is a *rough* estimation of the quality. You should just consider
// the bucket it's in (q > 80? > 50? > 20?) and not take it for face value.
/*
gcc -o webp_quality webp_quality.c -O3 -I../ -L. -L../imageio \
-limageio_util -lwebpextras -lwebp -lm -lpthread
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "extras/extras.h"
#include "imageio/imageio_util.h"
#include "../examples/unicode.h"
int main(int argc, const char* argv[]) {
int c;
int quiet = 0;
int ok = 1;
INIT_WARGV(argc, argv);
for (c = 1; ok && c < argc; ++c) {
if (!strcmp(argv[c], "-quiet")) {
quiet = 1;
} else if (!strcmp(argv[c], "-help") || !strcmp(argv[c], "-h")) {
printf("webp_quality [-h][-quiet] webp_files...\n");
FREE_WARGV_AND_RETURN(0);
} else {
const char* const filename = (const char*)GET_WARGV(argv, c);
const uint8_t* data = NULL;
size_t data_size = 0;
int q;
ok = ImgIoUtilReadFile(filename, &data, &data_size);
if (!ok) break;
q = VP8EstimateQuality(data, data_size);
if (!quiet) WPRINTF("[%s] ", (const W_CHAR*)filename);
if (q < 0) {
fprintf(stderr, "Not a WebP file, or not a lossy WebP file.\n");
ok = 0;
} else {
if (!quiet) {
printf("Estimated quality factor: %d\n", q);
} else {
printf("%d\n", q); // just print the number
}
}
free((void*)data);
}
}
FREE_WARGV_AND_RETURN(ok ? 0 : 1);
}
|
