v4lgrab: Add a notice on its source that this utility is legacy

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

diff --git a/contrib/test/v4lgrab.c b/contrib/test/v4lgrab.c
index cedeeece312846432c2db7bebfa4b7f976d9f36a..7c2621e5ae8daf1e6b27a4810a7cc215b6cbb1cd 100644 (file)
--- a/contrib/test/v4lgrab.c
+++ b/contrib/test/v4lgrab.c
@@ -11,6 +11,9 @@
  *      Copied from http://www.tazenda.demon.co.uk/phil/vgrabber.c
  *      with minor modifications (Dave Forrest, drf5n@virginia.edu).
  *
+ * NOTE: This utility uses the old, discontinued V4L version 1 API.
+ * It is kept here solely for the purposes of testing the libv4l1
+ * compatibility layer, as the V4L1 API were removed on kernel 2.6.39.
  */
 
 #include <unistd.h>