Перевёрнутые камеры =)
This commit is contained in:
Kolan Sh
parent
5ba787d4ce
commit
2df12441a1
|
|
@ -0,0 +1,193 @@
|
|||
|
||||
//<?php cc flipped_webcam.c && ./a.out
|
||||
#include <sys/stat.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
struct v4lcontrol_flags_info {
|
||||
unsigned short vendor_id;
|
||||
unsigned short product_id;
|
||||
unsigned short product_mask;
|
||||
/*const */char *dmi_board_vendor;
|
||||
/*const */char *dmi_board_name;
|
||||
/* We could also use the USB manufacturer and product strings some devices have
|
||||
const char *manufacturer;
|
||||
const char *product; */
|
||||
int flags;
|
||||
int default_gamma;
|
||||
/* Some seldom used dmi strings (for notebooks with bogus info in the board
|
||||
entries, but usefull info elsewhere). We keep this at the end as to not
|
||||
polute the initalizers for the normal case. */
|
||||
/* System (product) vendor / name */
|
||||
const char *dmi_system_vendor;
|
||||
const char *dmi_system_name;
|
||||
/* Board and System versions */
|
||||
const char *dmi_board_version;
|
||||
const char *dmi_system_version;
|
||||
};
|
||||
|
||||
/* Controls */
|
||||
enum {
|
||||
V4LCONTROL_WHITEBALANCE,
|
||||
V4LCONTROL_HFLIP,
|
||||
V4LCONTROL_VFLIP,
|
||||
V4LCONTROL_GAMMA,
|
||||
/* All fake controls above here are auto enabled when not present in hw */
|
||||
V4LCONTROL_AUTO_ENABLE_COUNT,
|
||||
V4LCONTROL_AUTOGAIN,
|
||||
V4LCONTROL_AUTOGAIN_TARGET,
|
||||
V4LCONTROL_COUNT
|
||||
};
|
||||
|
||||
|
||||
struct v4lcontrol_data {
|
||||
int fd; /* Device fd */
|
||||
int flags; /* Flags for this device */
|
||||
int priv_flags; /* Internal use only flags */
|
||||
int controls; /* Which controls to use for this device */
|
||||
unsigned int *shm_values; /* shared memory control value store */
|
||||
unsigned int old_values[V4LCONTROL_COUNT]; /* for controls_changed() */
|
||||
/*const */struct v4lcontrol_flags_info/* **/flags_info;
|
||||
};
|
||||
|
||||
static void v4lcontrol_get_dmi_string(const char *string, char *buf, int size)
|
||||
{
|
||||
FILE *f;
|
||||
char *s, sysfs_name[512];
|
||||
|
||||
snprintf(sysfs_name, sizeof(sysfs_name),
|
||||
"/sys/class/dmi/id/%s", string);
|
||||
f = fopen(sysfs_name, "r");
|
||||
if (!f) {
|
||||
/* Try again with a different sysfs path, not sure if this is needed
|
||||
but we used to look under /sys/devices/virtual/dmi/id in older
|
||||
libv4l versions, but this did not work with some kernels */
|
||||
snprintf(sysfs_name, sizeof(sysfs_name),
|
||||
"/sys/devices/virtual/dmi/id/%s", string);
|
||||
f = fopen(sysfs_name, "r");
|
||||
if (!f) {
|
||||
buf[0] = 0;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
s = fgets(buf, size, f);
|
||||
if (s)
|
||||
s[strlen(s) - 1] = 0;
|
||||
fclose(f);
|
||||
}
|
||||
|
||||
static int v4lcontrol_get_usb_ids(struct v4lcontrol_data *data,
|
||||
unsigned short *vendor_id, unsigned short *product_id)
|
||||
{
|
||||
FILE *f;
|
||||
int i, minor;
|
||||
struct stat st;
|
||||
char sysfs_name[512];
|
||||
char c, *s, buf[32];
|
||||
|
||||
if (fstat(data->fd, &st) || !S_ISCHR(st.st_mode))
|
||||
return 0; /* Should never happen */
|
||||
|
||||
/* <Sigh> find ourselve in sysfs */
|
||||
for (i = 0; i < 256; i++) {
|
||||
snprintf(sysfs_name, sizeof(sysfs_name),
|
||||
"/sys/class/video4linux/video%d/dev", i);
|
||||
f = fopen(sysfs_name, "r");
|
||||
if (!f)
|
||||
continue;
|
||||
|
||||
s = fgets(buf, sizeof(buf), f);
|
||||
fclose(f);
|
||||
|
||||
if (s && sscanf(buf, "%*d:%d%c", &minor, &c) == 2 && c == '\n'/* &&
|
||||
minor == minor(st.st_rdev)*/)
|
||||
break;
|
||||
}
|
||||
if (i == 256)
|
||||
return 0; /* Not found, sysfs not mounted? */
|
||||
|
||||
/* Get vendor and product ID */
|
||||
snprintf(sysfs_name, sizeof(sysfs_name),
|
||||
"/sys/class/video4linux/video%d/device/modalias", i);
|
||||
f = fopen(sysfs_name, "r");
|
||||
if (f) {
|
||||
s = fgets(buf, sizeof(buf), f);
|
||||
fclose(f);
|
||||
|
||||
if (!s || sscanf(s, "usb:v%4hxp%4hx%c", vendor_id, product_id, &c) != 3 ||
|
||||
c != 'd')
|
||||
return 0; /* Not an USB device */
|
||||
} else {
|
||||
/* Try again assuming the device link points to the usb
|
||||
device instead of the usb interface (bug in older versions
|
||||
of gspca) */
|
||||
|
||||
/* Get product ID */
|
||||
snprintf(sysfs_name, sizeof(sysfs_name),
|
||||
"/sys/class/video4linux/video%d/device/idVendor", i);
|
||||
f = fopen(sysfs_name, "r");
|
||||
if (!f)
|
||||
return 0; /* Not an USB device (or no sysfs) */
|
||||
|
||||
s = fgets(buf, sizeof(buf), f);
|
||||
fclose(f);
|
||||
|
||||
if (!s || sscanf(s, "%04hx%c", vendor_id, &c) != 2 || c != '\n')
|
||||
return 0; /* Should never happen */
|
||||
|
||||
/* Get product ID */
|
||||
snprintf(sysfs_name, sizeof(sysfs_name),
|
||||
"/sys/class/video4linux/video%d/device/idProduct", i);
|
||||
f = fopen(sysfs_name, "r");
|
||||
if (!f)
|
||||
return 0; /* Should never happen */
|
||||
|
||||
s = fgets(buf, sizeof(buf), f);
|
||||
fclose(f);
|
||||
|
||||
if (!s || sscanf(s, "%04hx%c", product_id, &c) != 2 || c != '\n')
|
||||
return 0; /* Should never happen */
|
||||
}
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
int main(int argc, char *argv[])
|
||||
{
|
||||
char dmi_board_vendor[512], dmi_board_name[512];
|
||||
|
||||
unsigned short vendor_id = 0;
|
||||
unsigned short product_id = 0;
|
||||
struct v4lcontrol_data *data = calloc(1, sizeof(struct v4lcontrol_data));
|
||||
|
||||
/* Get DMI board and system strings */
|
||||
v4lcontrol_get_dmi_string("board_vendor", dmi_board_vendor,
|
||||
sizeof(dmi_board_vendor));
|
||||
v4lcontrol_get_dmi_string("board_name", dmi_board_name,
|
||||
sizeof(dmi_board_name));
|
||||
|
||||
data->flags_info.dmi_board_name = dmi_board_vendor;
|
||||
data->flags_info.dmi_board_name = dmi_board_name;
|
||||
|
||||
/* Get Bus and Device ids */
|
||||
int got_usb_ids = v4lcontrol_get_usb_ids(data, &vendor_id, &product_id);
|
||||
|
||||
if (!got_usb_ids) {
|
||||
fprintf(stderr, "Sorry, webcamera device not recognised :(");
|
||||
exit(-1);
|
||||
}
|
||||
|
||||
puts("If Your PC is a Laptop add this two strings to mediat-tv/v4l-utils/lib/libv4lconvert/control/libv4lcontrol.c:");
|
||||
printf(" { 0x%4.4x, 0x%4.4x, 0, \"%s\", \"%s\",\n", vendor_id, product_id, dmi_board_vendor, dmi_board_name);
|
||||
puts(" V4LCONTROL_HFLIPPED | V4LCONTROL_VFLIPPED },");
|
||||
puts("\n");
|
||||
puts("Otherwise if Your PC is a Desktop string lines should look like this:");
|
||||
printf(" { 0x%4.4x, 0x%4.4x, 0, NULL, NULL,\n", vendor_id, product_id);
|
||||
puts(" V4LCONTROL_HFLIPPED | V4LCONTROL_VFLIPPED },");
|
||||
puts("\n");
|
||||
puts("Rebuild the package and send to v4l maintainers Your camera info.");
|
||||
|
||||
return EXIT_SUCCESS;
|
||||
}//?>
|
||||
Loading…
Reference in New Issue