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adding a new tool : video-infos

master
tth 3 years ago
parent
commit
991308f5b2
  1. 1
      .gitignore
  2. 9
      v4l2/Makefile
  3. 21
      v4l2/v4l2_pr_structs.c
  4. 4
      v4l2/v4l2_pr_structs.h
  5. 104
      v4l2/video-infos.c

1
.gitignore vendored

@ -17,6 +17,7 @@ v4l2/capture @@ -17,6 +17,7 @@ v4l2/capture
v4l2/grabvidseq
v4l2/*.o
v4l2/*.ppm
v4l2/video-infos
tools/fimg2png
tools/fimg2pnm

9
v4l2/Makefile

@ -14,13 +14,18 @@ funcs.o: funcs.c funcs.h Makefile @@ -14,13 +14,18 @@ funcs.o: funcs.c funcs.h Makefile
v4l2_pr_structs.o: v4l2_pr_structs.c v4l2_pr_structs.h Makefile
gcc ${COPT} -c $<
grabvidseq: grabvidseq.c Makefile
gcc -Wall -g $< ../libfloatimg.a -lv4l2 -o $@
video-infos: video-infos.c Makefile funcs.o v4l2_pr_structs.o
gcc -Wall -g $< ../libfloatimg.a funcs.o v4l2_pr_structs.o -o $@
# ---------------
# external things
capture: capture.c Makefile
gcc -Wall -g $< -o $@
grabvidseq: grabvidseq.c Makefile
gcc -Wall -g $< ../libfloatimg.a -lv4l2 -o $@

21
v4l2/v4l2_pr_structs.c

@ -27,11 +27,26 @@ switch(type) { @@ -27,11 +27,26 @@ switch(type) {
return "???";
}
/* --------------------------------------------------------------------- */
int pr_v4l2_capability(char *txt, struct v4l2_capability *ptr)
{
fprintf(FP, "-- v4l2_capability, %-15s %p\n", txt, ptr);
fprintf(FP, " driver %s\n", ptr->driver);
fprintf(FP, " card %s\n", ptr->card);
fprintf(FP, " bus info %s\n", ptr->bus_info);
fprintf(FP, " version %X\n", ptr->version);
fprintf(FP, " capabilities %X\n", ptr->capabilities);
fprintf(FP, " device caps %X\n", ptr->device_caps);
return -1;
}
/* --------------------------------------------------------------------- */
int pr_v4l2_format(char *txt, struct v4l2_format *ptr)
{
fprintf(FP, "-- v4l2_format, %-15s %p\n", txt, ptr);
fprintf(FP, " type %d %s\n", ptr->type,/* enum v4l2_buf_type */
fmttype2str(ptr->type));
fmttype2str(ptr->type));
switch(ptr->type) {
@ -39,10 +54,10 @@ switch(ptr->type) { @@ -39,10 +54,10 @@ switch(ptr->type) {
fprintf(FP, " dims %dx%d\n",
ptr->fmt.pix.width,
ptr->fmt.pix.height);
break;
default: fputs(" ???\n", FP); break;
default: fprintf(FP, "type is %d\n", ptr->type);
break;
}

4
v4l2/v4l2_pr_structs.h

@ -1,8 +1,12 @@ @@ -1,8 +1,12 @@
/*
* fonctions pour afficher les structures de V4L2
*
* WARNING : this is a work in progress !
*/
/* --------------------------------------------------------------------- */
int pr_v4l2_capability(char *txt, struct v4l2_capability *ptr);
int pr_v4l2_format(char *txt, struct v4l2_format *ptr);
int pr_v4l2_requestbuffers(char *txt, struct v4l2_requestbuffers *ptr);
/* --------------------------------------------------------------------- */

104
v4l2/video-infos.c

@ -0,0 +1,104 @@ @@ -0,0 +1,104 @@
/*
* 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;
/* --------------------------------------------------------------------- */
int show_webcam_infos(char *devname, int k)
{
int vfd, foo;
struct v4l2_capability cap;
struct v4l2_format fmt;
// 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);
foo = ioctl(vfd, VIDIOC_QUERYCAP, &cap);
if (foo < 0) {
perror("ioctl QUERYCAP");
return -4;
}
pr_v4l2_capability(devname, &cap);
if ( ! (cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
fprintf("%s : no video capture\n", devname);
}
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, "\tshow_webcam_infos -> %d\n", foo);
return 0;
}
/* --------------------------------------------------------------------- */
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