Properly check for all required bktr headers.

inspired by a patch from Tatu Kilappa, trilkk iki fi

Originally committed as revision 7374 to svn://svn.ffmpeg.org/ffmpeg/trunk

configure

@@ -455,6 +455,11 @@ HAVE_LIST='
     beosthreads
     byteswap_h
     dcbzl
+    dev_bktr_ioctl_bt848_h
+    dev_bktr_ioctl_meteor_h
+    dev_ic_bt8xx_h
+    dev_video_meteor_ioctl_meteor_h
+    dev_video_bktr_ioctl_bt848_h
     dlfcn_h
     dlopen
     freetype2
@@ -463,6 +468,8 @@ HAVE_LIST='
     inet_aton
     localtime_r
     lrintf
+    machine_ioctl_bt848_h
+    machine_ioctl_meteor_h
     malloc_h
     memalign
     mlib
@@ -1660,6 +1667,20 @@ int dummy = V4L2_PIX_FMT_YUV420;
 struct v4l2_buffer dummy1;
 EOF
 
+# check for ioctl_meteor.h, ioctl_bt848.h and alternatives
+if enabled bktr; then
+    check_header dev/bktr/ioctl_meteor.h
+    check_header dev/bktr/ioctl_bt848.h
+
+    check_header machine/ioctl_meteor.h
+    check_header machine/ioctl_bt848.h
+
+    check_header dev/video/meteor/ioctl_meteor.h
+    check_header dev/video/bktr/ioctl_bt848.h
+
+    check_header dev/ic/bt8xx.h
+fi
+
 # Deal with the x11 frame grabber
 enabled x11grab                         &&
 enabled gpl                             &&

libavformat/grab_bktr.c

@@ -24,21 +24,16 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 #include "avformat.h"
-#if defined(__FreeBSD__)
-# if __FreeBSD__ >= 502100
+#if defined (HAVE_DEV_BKTR_IOCTL_METEOR_H) && defined (HAVE_DEV_BKTR_IOCTL_BT848_H)
 # include <dev/bktr/ioctl_meteor.h>
 # include <dev/bktr/ioctl_bt848.h>
-# else
+#elif defined (HAVE_MACHINE_IOCTL_METEOR_H) && defined (HAVE_MACHINE_IOCTL_BT848_H)
 # include <machine/ioctl_meteor.h>
 # include <machine/ioctl_bt848.h>
-# endif
-#elif defined(__FreeBSD_kernel__)
-# include <dev/bktr/ioctl_meteor.h>
-# include <dev/bktr/ioctl_bt848.h>
-#elif defined(__DragonFly__)
+#elif defined (HAVE_DEV_VIDEO_METEOR_IOCTL_METEOR_H) && defined (HAVE_DEV_VIDEO_METEOR_IOCTL_BT848_H)
 # include <dev/video/meteor/ioctl_meteor.h>
 # include <dev/video/bktr/ioctl_bt848.h>
-#else
+#elif HAVE_DEV_IC_BT8XX_H
 # include <dev/ic/bt8xx.h>
 #endif
 #include <unistd.h>