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enumerate image formats

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This commit is contained in:
Tonton Th
2019-07-27 04:03:57 +02:00
parent bba944e055
commit c74695d07e
3 changed files with 49 additions and 3 deletions
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38
v4l2/video-infos.c
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@@ -19,6 +19,37 @@
int verbosity;
/* --------------------------------------------------------------------- */
int enum_image_formats(int fd, char *txt, int k)
{
int foo, idx;
struct v4l2_fmtdesc fmtd;
printf("-- image formats enumeration (%s)\n", txt);
idx = 0;
for (;;) {
memset(&fmtd, 0, sizeof(fmtd));
fmtd.index = idx;
fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
foo = ioctl(fd, VIDIOC_ENUM_FMT, &fmtd);
// fprintf(stderr, "B idx=%d, foo=%d, errno=%d\n", idx, foo, errno);
if (foo) {
if (EINVAL==errno) {
break;
}
else {
perror(__func__);
break;
}
}
pr_v4l2_fmtdesc(__func__, &fmtd);
idx++;
}
return -1;
}
/* --------------------------------------------------------------------- */
static int enum_inputs(int fd, char *txt, int k)
{
@@ -124,7 +155,7 @@ while (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) {
return -1;
}
/* --------------------------------------------------------------------- */
int show_webcam_infos(char *devname, int k)
int show_webcam_infos(char *devname, char *title, int k)
{
int vfd, foo;
@@ -162,8 +193,9 @@ if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
}
pr_v4l2_input("input 0", &input);
foo = enum_inputs(vfd, "is that working ?", 0);
foo = enum_inputs(vfd, "on peut voir quoi ?", 0);
foo = enum_image_formats(vfd, "Experimental", 0);
fputs("--\n", stderr);
foo = enum_controls(vfd, "is that working ?", 0);
@@ -216,7 +248,7 @@ while ((opt = getopt(argc, argv, "d:hK:lv")) != -1) {
if (verbosity) fimg_print_version(0);
foo = show_webcam_infos(device, K);
foo = show_webcam_infos(device, "", K);
fprintf(stderr, "\n\tshow_webcam_infos -> %d\n", foo);
return 0;