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more and more semi-useless datas

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tth 2019-07-24 17:00:07 +02:00
parent 4e687db723
commit e46d490e05
3 changed files with 153 additions and 5 deletions
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44
v4l2/v4l2_pr_structs.c
View File

@ -73,7 +73,7 @@ fprintf(FP, " device caps 0x%X\n", ptr->device_caps);
return -1;
}
/* --------------------------------------------------------------------- */
static char *str_input_type(int t)
char *str_input_type(int t)
{
switch (t) {
case V4L2_INPUT_TYPE_TUNER: return "tuner";
@ -144,6 +144,44 @@ fprintf(FP, " type %d\n", ptr->type); /* enum v4l2_buf_type */
return 0;
}
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */
/* --------------------------------------------------------------------- */
char *str_ctrl_type(int type)
{
switch (type) {
case V4L2_CTRL_TYPE_INTEGER: return "integer";
case V4L2_CTRL_TYPE_BOOLEAN: return "boolean";
case V4L2_CTRL_TYPE_MENU: return "menu";
case V4L2_CTRL_TYPE_BUTTON: return "button";
case V4L2_CTRL_TYPE_INTEGER64: return "int64";
case V4L2_CTRL_TYPE_CTRL_CLASS: return "ctrl-class";
case V4L2_CTRL_TYPE_STRING: return "string";
case V4L2_CTRL_TYPE_BITMASK: return "bitmask";
case V4L2_CTRL_TYPE_INTEGER_MENU: return "int-menu";
}
return "???";
}
/* --------------------------------------------------------------------- */
/*
The 32-bit qctrl.id value is subdivided into three bit ranges:
the top 4 bits are reserved for flags (e. g. V4L2_CTRL_FLAG_NEXT_CTRL)
and are not actually part of the ID.
The remaining 28 bits form the control ID, of which the most significant
12 bits define the control class and the least significant
16 bits identify the control within the control class.
*/
void pr_ctrl_id(uint32_t id)
{
if (verbosity) fprintf(FP, "%08x : ", id);
fprintf(FP, "%x %03x %04x", (id>>28)&0xf,
V4L2_CTRL_ID2CLASS(id)>>16, id&0xffff);
}
/* --------------------------------------------------------------------- */
int pr_v4l2_control(char *txt, struct v4l2_control *ptr)
{
return -1;
}
/* --------------------------------------------------------------------- */

4
v4l2/v4l2_pr_structs.h
View File

@ -9,5 +9,9 @@ int pr_v4l2_capability(char *txt, struct v4l2_capability *ptr);
int pr_v4l2_input(char *txt, struct v4l2_input *ptr);
int pr_v4l2_format(char *txt, struct v4l2_format *ptr);
int pr_v4l2_requestbuffers(char *txt, struct v4l2_requestbuffers *ptr);
char *str_input_type(int t);
char *str_ctrl_type(int type);
/* --------------------------------------------------------------------- */

110
v4l2/video-infos.c
View File

@ -8,7 +8,7 @@
#include <math.h>
#include <string.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <linux/videodev2.h>
#include "../floatimg.h"
@ -19,12 +19,109 @@
int verbosity;
/* --------------------------------------------------------------------- */
static int enum_input(char *txt, int k)
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; idx<V4L2_CID_LASTP1; idx++) {
qctrl.id = idx;
if (verbosity) 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) puts("einval");
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("-- 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)) {
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, int k)
{
@ -64,6 +161,15 @@ if (-1 == ioctl(vfd, VIDIOC_ENUMINPUT, &input)) {
}
pr_v4l2_input("input 0", &input);
foo = enum_inputs(vfd, "is that working ?", 0);
fputs("--\n", stderr);
foo = enum_controls(vfd, "is that working ?", 0);
fputs("--\n", stderr);
foo = enum_extended_controls(vfd, "looking for extended", 0);
close(vfd);