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Commit f90c3c0b authored by Simon Harrison's avatar Simon Harrison Committed by Mauro Carvalho Chehab
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V4L/DVB (10210): Fix a bug on v4lgrab.c 



v4lgrab  breaks the fputc macro on some systems, because of #defined
FILE.

Also, I also added comments because it was not at all clear that to get gspca
cameras to work with this application you need v4l1compat.

Signed-off-by: default avatarSimon Harrison <si1356@yahoo.co.uk>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent 3e478c06

Documentation/video4linux/v4lgrab.c

+17 −8
Original line number Diff line number Diff line
@@ -11,6 +11,15 @@ 
 *	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>
@@ -24,7 +33,7 @@ 
#include <linux/types.h>

#include <linux/videodev.h>



#define FILE "/dev/video0"

#define VIDEO_DEV "/dev/video0"



/* Stole this from tvset.c */
@@ -90,7 +99,7 @@ int get_brightness_adj(unsigned char *image, long size, int *brightness) { 


int main(int argc, char ** argv)

{

  int fd = open(FILE, O_RDONLY), f;

  int fd = open(VIDEO_DEV, O_RDONLY), f;

  struct video_capability cap;

  struct video_window win;

  struct video_picture vpic;
@@ -100,13 +109,13 @@ int main(int argc, char ** argv) 
  unsigned int i, src_depth;



  if (fd < 0) {

    perror(FILE);

    perror(VIDEO_DEV);

    exit(1);

  }



  if (ioctl(fd, VIDIOCGCAP, &cap) < 0) {

    perror("VIDIOGCAP");

    fprintf(stderr, "(" FILE " not a video4linux device?)\n");

    fprintf(stderr, "(" VIDEO_DEV " not a video4linux device?)\n");

    close(fd);

    exit(1);

  }