332 lines
6.7 KiB
C
332 lines
6.7 KiB
C
/*
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* tests pour capturer les webcams
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <math.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <errno.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 "v4l2_pr_structs.h"
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#include "funcs.h"
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int verbosity;
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/* --------------------------------------------------------------------- */
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/*
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* this code was written from a strace output :)
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*/
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int enum_image_framesizes(int fd, char *txt, int k)
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{
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int foo, idx;
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struct v4l2_frmsizeenum fmtsz;
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printf("## image framesizes enumeration (%s)\n", txt);
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for (idx=0; ; idx++) {
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memset(&fmtsz, 0, sizeof(fmtsz));
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fmtsz.index = idx;
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foo = ioctl(fd, VIDIOC_ENUM_FRAMESIZES, &fmtsz);
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if (foo) {
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if (EINVAL==errno) {
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break;
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}
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else {
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perror(__func__);
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break;
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}
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}
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printf("%4d %4d %4d\n", idx, fmtsz.pixel_format, fmtsz.type);
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int enum_image_formats(int fd, char *txt, int k)
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{
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int foo, idx;
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struct v4l2_fmtdesc fmtd;
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printf("## image formats enumeration (%s)\n", txt);
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idx = 0;
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for (;;) {
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memset(&fmtd, 0, sizeof(fmtd));
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fmtd.index = idx;
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fmtd.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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foo = ioctl(fd, VIDIOC_ENUM_FMT, &fmtd);
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// fprintf(stderr, "B idx=%d, foo=%d, errno=%d\n", idx, foo, errno);
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if (foo) {
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if (EINVAL==errno) {
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break;
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}
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else {
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perror(__func__);
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break;
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}
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}
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// pr_v4l2_fmtdesc(__func__, &fmtd);
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printf(" %2d %-10s 0x%02x %s %-32s \n",
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fmtd.index, str_buf_type(fmtd.type), fmtd.flags,
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str_fourcc(fmtd.pixelformat), fmtd.description);
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idx++;
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}
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return -1;
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}
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/* --------------------------------------------------------------------- */
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static int enum_inputs(int fd, char *txt, int k)
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{
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int index, foo;
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struct v4l2_input input;
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char ligne[50];
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printf("## inputs enumeration (%s)\n", txt);
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index = 0;
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for(;;) {
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memset (&input, 0, sizeof (input));
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input.index = index;
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foo = ioctl(fd, VIDIOC_ENUMINPUT, &input);
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if (foo) {
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if (EINVAL==errno) { break; }
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else {
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perror("enuminput");
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return -1;
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}
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}
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if (verbosity) {
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sprintf(ligne, "input %d", index);
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pr_v4l2_input(ligne, &input);
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}
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else {
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printf("%-32s | %-10s\n", input.name,
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str_input_type(input.type));
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}
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index++;
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}
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int enum_controls(int fd, char *txt, int k)
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{
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struct v4l2_queryctrl qctrl;
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int idx;
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printf("## controls enumeration '%s'\n", txt);
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memset (&qctrl, 0, sizeof (qctrl));
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/* V4L2_CID_BASE defined in linux/v4l2-controls.h */
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for (idx=V4L2_CID_BASE; idx<V4L2_CID_LASTP1; idx++) {
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qctrl.id = idx;
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// if (verbosity>1) printf(" id %d ", idx);
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if (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) {
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if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED) {
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printf("disabled\n");
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continue;
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}
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printf(" %-40s %-10s [%d..%d]\n",
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qctrl.name,
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str_ctrl_type(qctrl.type),
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qctrl.minimum, qctrl.maximum);
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}
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else if (EINVAL==errno) {
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#if DEBUG_LEVEL
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if (verbosity) fprintf(stderr, "id %d einval\n", idx);
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#endif
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continue;
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}
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else {
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printf("err %d %s\n", errno, strerror(errno));
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}
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fflush(stdout); fflush(stderr);
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}
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return -1;
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}
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/* --------------------------------------------------------------------- */
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/*
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* code based on :
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https://www.linuxtv.org/downloads/legacy/video4linux/API/V4L2_API/spec-single/v4l2.html
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*
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*/
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int enum_extended_controls(int fd, char *txt, int k)
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{
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struct v4l2_queryctrl qctrl;
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int idx;
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printf("##- extended controls enumeration '%s'\n", txt);
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memset(&qctrl, 0, sizeof(qctrl));
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qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL;
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idx = 0;
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while (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) {
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if (verbosity) pr_ctrl_id(qctrl.id);
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printf(" %-32s %-10s [%d..%d]\n",
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qctrl.name,
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str_ctrl_type(qctrl.type),
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qctrl.minimum, qctrl.maximum);
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qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL;
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idx++;
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}
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return -1;
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}
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/* --------------------------------------------------------------------- */
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int show_webcam_infos(char *devname, char *title, int k, int type)
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{
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int vfd, foo;
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char ligne[100];
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struct v4l2_capability cap;
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struct v4l2_format fmt;
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// struct v4l2_input input;
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// int index;
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// struct v4l2_requestbuffers reqbuf;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( '%s' %d %d)\n", __func__, devname, k, type);
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#endif
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vfd = open_device(devname);
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if (vfd < 0) {
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perror(devname);
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return -3;
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}
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fprintf(stderr, "\topen %s -> %d\n", devname, vfd);
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memset(&cap, 0, sizeof(cap));
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foo = ioctl(vfd, VIDIOC_QUERYCAP, &cap);
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if (foo < 0) {
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perror("ioctl QUERYCAP");
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return -4;
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}
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pr_v4l2_capability(devname, &cap);
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foo = enum_inputs(vfd, "on peut voir quoi ?", 0);
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memset(&fmt, 0, sizeof(fmt));
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fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
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foo = ioctl(vfd, VIDIOC_G_FMT, &fmt);
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if (0 != foo) {
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perror("ioctl G_FMT");
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}
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else {
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pr_v4l2_format("Experimental", &fmt);
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}
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if (type) {
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;
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}
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else {
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foo = enum_image_formats(vfd, "Experimental", 0);
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foo = enum_controls(vfd, "is that working ?", 0);
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foo = enum_extended_controls(vfd, "looking for extended", 0);
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enum_image_framesizes(vfd, "code pas fini", 0);
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}
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close(vfd);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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int liste_des_devices(int flag)
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{
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fprintf(stderr, "%s not implemented\n", __func__);
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return -1;
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}
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/* --------------------------------------------------------------------- */
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static void help(int k)
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{
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puts("Options :");
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puts("\t-e N\t\texamine that, please");
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puts("\t-d\t\tselect the video device");
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puts("\t-K\t\tset the K parameter");
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puts("\t-l\t\tlist video devices");
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puts("\t-T bla\t\tadd a title");
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puts("\t-v\t\tincrease verbosity");
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// if (verbosity)
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{ puts(""); fimg_print_version(1); }
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exit(0);
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}
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/* --------------------------------------------------------------------- */
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static void print_title(char *txt)
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{
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int foo, l;
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l = strlen(txt);
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for (foo=0; foo<l+18; foo++)
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putchar('*');
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puts("");
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printf("****** %s ******\n", txt);
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for (foo=0; foo<l+18; foo++)
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putchar('*');
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puts("\n");
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}
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/* --------------------------------------------------------------------- */
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int main(int argc, char *argv[])
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{
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int foo, opt;
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int etype = 0;
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char *device = "/dev/video0";
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char *title = NULL;
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int K = 0;
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while ((opt = getopt(argc, argv, "d:e:hK:lT:v")) != -1) {
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switch(opt) {
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case 'd': device = optarg; break;
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case 'e': etype = atol(optarg); break;
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case 'h': help(0); break;
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case 'K': K = atol(optarg); break;
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case 'l': liste_des_devices(0); break;
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case 'T': title = optarg; break;
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case 'v': verbosity++; break;
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}
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}
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if (NULL != title) {
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print_title(title);
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}
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foo = show_webcam_infos(device, "", K, etype);
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fprintf(stderr, "\n\tshow_webcam_infos -> %d\n", foo);
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return 0;
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}
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/* --------------------------------------------------------------------- */
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