FloatImg/v4l2/t.c

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/*
* tests pour capturer les webcams
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <math.h>
#include <string.h>
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#include <sys/ioctl.h>
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#include <inttypes.h>
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#include <linux/videodev2.h>
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#include "../floatimg.h"
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#include "funcs.h"
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#include "v4l2_pr_structs.h"
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int verbosity;
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/* --------------------------------------------------------------------- */
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int essai_get_fmt(char *dev, int k)
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{
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int vfd, foo;
struct v4l2_format fmt;
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// struct v4l2_requestbuffers reqbuf;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( '%s' %d )\n", __func__, dev, k);
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#endif
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vfd = open_device(dev);
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if (verbosity) fprintf(stderr, "\topen %s -> %d\n", dev, vfd);
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memset(&fmt, 0, sizeof(fmt));
fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
foo = ioctl(vfd, VIDIOC_G_FMT, &fmt);
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if (verbosity) fprintf(stderr, "%s: ioctl -> %d\n", __func__, foo);
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if (0 != foo) {
perror("ioctl G_FMT");
return -1;
}
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pr_v4l2_format("after ioctl VIDIOC_G_FMT", &fmt);
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/* this function is bugged */
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close(vfd);
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return k;
}
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/* --------------------------------------------------------------------- */
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void help(int k)
{
puts("Options :");
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puts("\t-d\tselect the video device");
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puts("\t-K\tset the K parameter");
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puts("\t-v\tincrease verbosity");
if (verbosity) { puts(""); fimg_print_version(1); }
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exit(0);
}
/* --------------------------------------------------------------------- */
int main(int argc, char *argv[])
{
int foo, opt;
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char *device = "/dev/video0";
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int K = 0;
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while ((opt = getopt(argc, argv, "d:hK:v")) != -1) {
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switch(opt) {
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case 'd': device = optarg; break;
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case 'h': help(0); break;
case 'K': K = atol(optarg); break;
case 'v': verbosity++; break;
}
}
if (verbosity) fimg_print_version(0);
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foo = essai_get_fmt(device, K);
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if (verbosity || foo) fprintf(stderr, "%s: essai -> %d\n", __func__, foo);
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return 0;
}
/* --------------------------------------------------------------------- */