FloatImg/v4l2/video-infos.c

/*
 *		tests pour capturer les webcams
 */

#include  <stdio.h>
#include  <stdlib.h>
#include  <unistd.h>
#include  <math.h>
#include  <string.h>
#include  <sys/ioctl.h>

#include  <linux/videodev2.h>

#include  "../floatimg.h"

#include  "v4l2_pr_structs.h"
#include  "funcs.h"

int		verbosity;

/* --------------------------------------------------------------------- */
static int enum_input(char *txt, int k)
{

return -1;
}

/* --------------------------------------------------------------------- */
int show_webcam_infos(char *devname, int k)
{
int				vfd, foo;

struct v4l2_capability		cap;
// struct v4l2_format		fmt;
struct v4l2_input		input;
// int 				index;

// struct v4l2_requestbuffers      reqbuf;

#if DEBUG_LEVEL
fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, devname, k);
#endif

vfd = open_device(devname);
if (vfd < 0) {
	perror(devname);
	return -3;
	}

fprintf(stderr, "\topen %s -> %d\n", devname, vfd);

memset(&cap, 0, sizeof(cap));
foo = ioctl(vfd, VIDIOC_QUERYCAP, &cap);
if (foo < 0) {
	perror("ioctl QUERYCAP");
	return -4;
	}
pr_v4l2_capability(devname, &cap);

memset(&input, 0, sizeof(input));
if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
	perror("VIDIOC_ENUMINPUT");
	exit(EXIT_FAILURE);
	}
pr_v4l2_input("input 0", &input);


close(vfd);

return 0;
}
/* --------------------------------------------------------------------- */
int liste_des_devices(int flag)
{
fprintf(stderr, "%s not implemented\n", __func__);
return -1;
}
/* --------------------------------------------------------------------- */

void help(int k)
{
puts("Options :");
puts("\t-d\tselect the video device");
puts("\t-K\tset the K parameter");
puts("\t-l\tlist video devices");
puts("\t-v\tincrease verbosity");

if (verbosity) { puts(""); fimg_print_version(1); }

exit(0);
}
/* --------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
int		foo, opt;

char		*device = "/dev/video0";
int		K = 0;

while ((opt = getopt(argc, argv, "d:hK:lv")) != -1) {
	switch(opt) {
		case 'd':	device = optarg;	break;
		case 'h':	help(0);		break;
		case 'K':	K = atol(optarg);	break;
		case 'l':	liste_des_devices(0);	break;
		case 'v':	verbosity++;		break;
		}
	}

if (verbosity) fimg_print_version(0);

foo = show_webcam_infos(device, K);
fprintf(stderr, "\n\tshow_webcam_infos -> %d\n", foo);

return 0;
}
/* --------------------------------------------------------------------- */