mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-13 11:51:32 +00:00
[media] Remove the old V4L1 v4lgrab.c file
This example file uses the old V4L1 API. It also doesn't use libv4l. So, it is completely obsolete. A good example already exists at v4l-utils (v4l2grab.c): http://git.linuxtv.org/v4l-utils.git Reviewed-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
1fb03673b9
commit
55fe25b418
@ -1,3 +1,3 @@
|
||||
obj-m := DocBook/ accounting/ auxdisplay/ connector/ \
|
||||
filesystems/ filesystems/configfs/ ia64/ laptops/ networking/ \
|
||||
pcmcia/ spi/ timers/ video4linux/ vm/ watchdog/src/
|
||||
pcmcia/ spi/ timers/ vm/ watchdog/src/
|
||||
|
||||
@ -1,8 +0,0 @@
|
||||
# kbuild trick to avoid linker error. Can be omitted if a module is built.
|
||||
obj- := dummy.o
|
||||
|
||||
# List of programs to build
|
||||
hostprogs-y := v4lgrab
|
||||
|
||||
# Tell kbuild to always build the programs
|
||||
always := $(hostprogs-y)
|
||||
@ -1,201 +0,0 @@
|
||||
/* Simple Video4Linux image grabber. */
|
||||
/*
|
||||
* Video4Linux Driver Test/Example Framegrabbing Program
|
||||
*
|
||||
* Compile with:
|
||||
* gcc -s -Wall -Wstrict-prototypes v4lgrab.c -o v4lgrab
|
||||
* Use as:
|
||||
* v4lgrab >image.ppm
|
||||
*
|
||||
* Copyright (C) 1998-05-03, Phil Blundell <philb@gnu.org>
|
||||
* Copied from http://www.tazenda.demon.co.uk/phil/vgrabber.c
|
||||
* with minor modifications (Dave Forrest, drf5n@virginia.edu).
|
||||
*
|
||||
*
|
||||
* For some cameras you may need to pre-load libv4l to perform
|
||||
* the necessary decompression, e.g.:
|
||||
*
|
||||
* export LD_PRELOAD=/usr/lib/libv4l/v4l1compat.so
|
||||
* ./v4lgrab >image.ppm
|
||||
*
|
||||
* see http://hansdegoede.livejournal.com/3636.html for details.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <unistd.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <sys/ioctl.h>
|
||||
#include <stdlib.h>
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/videodev.h>
|
||||
|
||||
#define VIDEO_DEV "/dev/video0"
|
||||
|
||||
/* Stole this from tvset.c */
|
||||
|
||||
#define READ_VIDEO_PIXEL(buf, format, depth, r, g, b) \
|
||||
{ \
|
||||
switch (format) \
|
||||
{ \
|
||||
case VIDEO_PALETTE_GREY: \
|
||||
switch (depth) \
|
||||
{ \
|
||||
case 4: \
|
||||
case 6: \
|
||||
case 8: \
|
||||
(r) = (g) = (b) = (*buf++ << 8);\
|
||||
break; \
|
||||
\
|
||||
case 16: \
|
||||
(r) = (g) = (b) = \
|
||||
*((unsigned short *) buf); \
|
||||
buf += 2; \
|
||||
break; \
|
||||
} \
|
||||
break; \
|
||||
\
|
||||
\
|
||||
case VIDEO_PALETTE_RGB565: \
|
||||
{ \
|
||||
unsigned short tmp = *(unsigned short *)buf; \
|
||||
(r) = tmp&0xF800; \
|
||||
(g) = (tmp<<5)&0xFC00; \
|
||||
(b) = (tmp<<11)&0xF800; \
|
||||
buf += 2; \
|
||||
} \
|
||||
break; \
|
||||
\
|
||||
case VIDEO_PALETTE_RGB555: \
|
||||
(r) = (buf[0]&0xF8)<<8; \
|
||||
(g) = ((buf[0] << 5 | buf[1] >> 3)&0xF8)<<8; \
|
||||
(b) = ((buf[1] << 2 ) & 0xF8)<<8; \
|
||||
buf += 2; \
|
||||
break; \
|
||||
\
|
||||
case VIDEO_PALETTE_RGB24: \
|
||||
(r) = buf[0] << 8; (g) = buf[1] << 8; \
|
||||
(b) = buf[2] << 8; \
|
||||
buf += 3; \
|
||||
break; \
|
||||
\
|
||||
default: \
|
||||
fprintf(stderr, \
|
||||
"Format %d not yet supported\n", \
|
||||
format); \
|
||||
} \
|
||||
}
|
||||
|
||||
static int get_brightness_adj(unsigned char *image, long size, int *brightness) {
|
||||
long i, tot = 0;
|
||||
for (i=0;i<size*3;i++)
|
||||
tot += image[i];
|
||||
*brightness = (128 - tot/(size*3))/3;
|
||||
return !((tot/(size*3)) >= 126 && (tot/(size*3)) <= 130);
|
||||
}
|
||||
|
||||
int main(int argc, char ** argv)
|
||||
{
|
||||
int fd = open(VIDEO_DEV, O_RDONLY), f;
|
||||
struct video_capability cap;
|
||||
struct video_window win;
|
||||
struct video_picture vpic;
|
||||
|
||||
unsigned char *buffer, *src;
|
||||
int bpp = 24, r = 0, g = 0, b = 0;
|
||||
unsigned int i, src_depth = 16;
|
||||
|
||||
if (fd < 0) {
|
||||
perror(VIDEO_DEV);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (ioctl(fd, VIDIOCGCAP, &cap) < 0) {
|
||||
perror("VIDIOGCAP");
|
||||
fprintf(stderr, "(" VIDEO_DEV " not a video4linux device?)\n");
|
||||
close(fd);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (ioctl(fd, VIDIOCGWIN, &win) < 0) {
|
||||
perror("VIDIOCGWIN");
|
||||
close(fd);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (ioctl(fd, VIDIOCGPICT, &vpic) < 0) {
|
||||
perror("VIDIOCGPICT");
|
||||
close(fd);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
if (cap.type & VID_TYPE_MONOCHROME) {
|
||||
vpic.depth=8;
|
||||
vpic.palette=VIDEO_PALETTE_GREY; /* 8bit grey */
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
|
||||
vpic.depth=6;
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
|
||||
vpic.depth=4;
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
|
||||
fprintf(stderr, "Unable to find a supported capture format.\n");
|
||||
close(fd);
|
||||
exit(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
} else {
|
||||
vpic.depth=24;
|
||||
vpic.palette=VIDEO_PALETTE_RGB24;
|
||||
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic) < 0) {
|
||||
vpic.palette=VIDEO_PALETTE_RGB565;
|
||||
vpic.depth=16;
|
||||
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
|
||||
vpic.palette=VIDEO_PALETTE_RGB555;
|
||||
vpic.depth=15;
|
||||
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
|
||||
fprintf(stderr, "Unable to find a supported capture format.\n");
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
buffer = malloc(win.width * win.height * bpp);
|
||||
if (!buffer) {
|
||||
fprintf(stderr, "Out of memory.\n");
|
||||
exit(1);
|
||||
}
|
||||
|
||||
do {
|
||||
int newbright;
|
||||
read(fd, buffer, win.width * win.height * bpp);
|
||||
f = get_brightness_adj(buffer, win.width * win.height, &newbright);
|
||||
if (f) {
|
||||
vpic.brightness += (newbright << 8);
|
||||
if(ioctl(fd, VIDIOCSPICT, &vpic)==-1) {
|
||||
perror("VIDIOSPICT");
|
||||
break;
|
||||
}
|
||||
}
|
||||
} while (f);
|
||||
|
||||
fprintf(stdout, "P6\n%d %d 255\n", win.width, win.height);
|
||||
|
||||
src = buffer;
|
||||
|
||||
for (i = 0; i < win.width * win.height; i++) {
|
||||
READ_VIDEO_PIXEL(src, vpic.palette, src_depth, r, g, b);
|
||||
fputc(r>>8, stdout);
|
||||
fputc(g>>8, stdout);
|
||||
fputc(b>>8, stdout);
|
||||
}
|
||||
|
||||
close(fd);
|
||||
return 0;
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user