Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (45 commits)
  V4L/DVB (10411): s5h1409: Perform s5h1409 soft reset after tuning
  V4L/DVB (10403): saa7134-alsa: saa7130 doesn't support digital audio
  V4L/DVB (10229): ivtv: fix memory leak
  V4L/DVB (10385): gspca - main: Fix memory leak when USB disconnection while streaming.
  V4L/DVB (10325): em28xx: Fix for fail to submit URB with IRQs and Pre-emption Disabled
  V4L/DVB (10317): radio-mr800: fix radio->muted and radio->stereo
  V4L/DVB (10314): cx25840: ignore TUNER_SET_CONFIG in the command callback.
  V4L/DVB (10288): af9015: bug fix: stick does not work always when plugged
  V4L/DVB (10287): af9015: fix second FE
  V4L/DVB (10270): saa7146: fix unbalanced mutex_lock/unlock
  V4L/DVB (10265): budget.c driver: Kernel oops: "BUG: unable to handle kernel paging request at ffffffff
  V4L/DVB (10261): em28xx: fix kernel panic on audio shutdown
  V4L/DVB (10257): em28xx: Fix for KWorld 330U Board
  V4L/DVB (10256): em28xx: Fix for KWorld 330U AC97
  V4L/DVB (10254): em28xx: Fix audio URB transfer buffer race condition
  V4L/DVB (10250): cx25840: fix regression: fw not loaded on first use
  V4L/DVB (10248): v4l-dvb: fix a bunch of compile warnings.
  V4L/DVB (10243): em28xx: fix compile warning
  V4L/DVB (10240): Fix obvious swapped names in v4l2_subdev logic
  V4L/DVB (10233): [PATCH] Terratec Cinergy DT XS Diversity new USB ID (0ccd:0081)
  ...

1 files changed, 17 insertions, 8 deletions

diff --git a/Documentation/video4linux/v4lgrab.c b/Documentation/video4linux/v4lgrab.c
index 079b628481c..d6e70bef8ad 100644
--- a/Documentation/video4linux/v4lgrab.c
+++ b/Documentation/video4linux/v4lgrab.c
@@ -4,12 +4,21 @@
  *
  *      Compile with:
  *              gcc -s -Wall -Wstrict-prototypes v4lgrab.c -o v4lgrab
- *      Use as:
- *              v4lgrab >image.ppm
+ *      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).
+ *      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.
  *
  */
 
@@ -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);
   }