/* * tests pour capturer les webcams */ #include #include #include #include #include #include #include #include #include #include "../floatimg.h" #include "v4l2_pr_structs.h" #include "funcs.h" 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); printf(" %2d %-10s 0x%02x %s %-32s \n", fmtd.index, str_buf_type(fmtd.type), fmtd.flags, str_fourcc(fmtd.pixelformat), fmtd.description); idx++; } return -1; } /* --------------------------------------------------------------------- */ static int enum_inputs(int fd, char *txt, int k) { int index, foo; struct v4l2_input input; printf("-- inputs enumeration '%s'\n", txt); index = 0; for(;;) { memset (&input, 0, sizeof (input)); input.index = index; foo = ioctl(fd, VIDIOC_ENUMINPUT, &input); if (foo) { if (EINVAL==errno) { break; } else { perror("enuminput"); return -1; } } printf("%-32s | %-10s\n", input.name, str_input_type(input.type)); index++; } return 0; } /* --------------------------------------------------------------------- */ int enum_controls(int fd, char *txt, int k) { struct v4l2_queryctrl qctrl; int foo, idx; printf("-- controls enumeration '%s'\n", txt); memset (&qctrl, 0, sizeof (qctrl)); /* V4L2_CID_BASE defined in linux/v4l2-controls.h */ for (idx=V4L2_CID_BASE; idx1) printf(" id %d ", idx); if (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) { if (qctrl.flags & V4L2_CTRL_FLAG_DISABLED) { printf("disabled\n"); continue; } printf(" %-32s %-10s [%d..%d]\n", qctrl.name, str_ctrl_type(qctrl.type), qctrl.minimum, qctrl.maximum); } else if (EINVAL==errno) { if (verbosity) fprintf(stderr, "id %d einval\n", idx); continue; } else { printf("err %d %s\n", errno, strerror(errno)); } fflush(stdout); fflush(stderr); } return -1; } /* --------------------------------------------------------------------- */ /* * code based on : https://www.linuxtv.org/downloads/legacy/video4linux/API/V4L2_API/spec-single/v4l2.html * */ int enum_extended_controls(int fd, char *txt, int k) { struct v4l2_queryctrl qctrl; int idx; printf("-- extended controls enumeration '%s'\n", txt); memset(&qctrl, 0, sizeof(qctrl)); qctrl.id = V4L2_CTRL_FLAG_NEXT_CTRL; idx = 0; while (0 == ioctl (fd, VIDIOC_QUERYCTRL, &qctrl)) { if (verbosity) pr_ctrl_id(qctrl.id); printf(" %-32s %-10s [%d..%d]\n", qctrl.name, str_ctrl_type(qctrl.type), qctrl.minimum, qctrl.maximum); qctrl.id |= V4L2_CTRL_FLAG_NEXT_CTRL; idx++; } return -1; } /* --------------------------------------------------------------------- */ int show_webcam_infos(char *devname, char *title, 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); foo = enum_inputs(vfd, "on peut voir quoi ?", 0); foo = enum_image_formats(vfd, "Experimental", 0); foo = enum_controls(vfd, "is that working ?", 0); foo = enum_extended_controls(vfd, "looking for extended", 0); 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; } /* --------------------------------------------------------------------- */