mirror of
https://github.com/webmproject/libwebp.git
synced 2024-11-19 20:08:28 +01:00
a67ff735a2
Use EXIT_SUCCESS / EXIT_FAILURE in most cases as more granularity isn't useful. For anim_diff, use 0 (success), 1 (image difference) and 2 (error) to align it with other diff utilities (diff, etc.). Bug: webp:637 Change-Id: I52925de8622a5a4d2141883279d69a1d95ef9b12
56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
// 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"
|
|
|
|
// Returns EXIT_SUCCESS on success, EXIT_FAILURE on failure.
|
|
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(EXIT_SUCCESS);
|
|
} 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 ? EXIT_SUCCESS : EXIT_FAILURE);
|
|
}
|