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authorMauro Carvalho Chehab <mchehab@redhat.com>2010-12-27 08:27:05 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-12-29 08:17:12 -0200
commit55fe25b418640fad04190103274841b2c907bacd (patch)
treea0ae7daa810729801269287824ec828b59120d83 /Documentation/video4linux
parent1fb03673b9eddb55a08174d0952c0a1c2438997e (diff)
downloadlwn-55fe25b418640fad04190103274841b2c907bacd.tar.gz
lwn-55fe25b418640fad04190103274841b2c907bacd.zip
[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>
Diffstat (limited to 'Documentation/video4linux')
-rw-r--r--Documentation/video4linux/Makefile8
-rw-r--r--Documentation/video4linux/v4lgrab.c201
2 files changed, 0 insertions, 209 deletions
diff --git a/Documentation/video4linux/Makefile b/Documentation/video4linux/Makefile
deleted file mode 100644
index 1ed0e98d057d..000000000000
--- a/Documentation/video4linux/Makefile
+++ /dev/null
@@ -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)
diff --git a/Documentation/video4linux/v4lgrab.c b/Documentation/video4linux/v4lgrab.c
deleted file mode 100644
index c8ded175796e..000000000000
--- a/Documentation/video4linux/v4lgrab.c
+++ /dev/null
@@ -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;
-}