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Fix v4l/v4l2 compilation problems

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Original commit message from CVS:
Fix v4l/v4l2 compilation problems
This commit is contained in:
Ronald S. Bultje 2003-03-09 15:07:53 +00:00
parent 72d53d141d
commit c5f3b5e48c
2 changed files with 37 additions and 2 deletions
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25
configure.ac
View file

@ -290,15 +290,36 @@ dnl this one is for hadess, no qcam when no nasm found
])
dnl *** Video 4 Linux ***
dnl for information about the header/define, see sys/v4l/gstv4lelement.h
translit(dnm, m, l) AM_CONDITIONAL(USE_V4L, true)
GST_CHECK_FEATURE(V4L, [Video 4 Linux], v4lsrc v4lmjpegsrc v4lmjpegsink, [
AC_CHECK_DECL(VID_TYPE_MPEG_ENCODER, HAVE_V4L="yes", HAVE_V4L="no", [#include <linux/videodev.h>])
AC_CHECK_DECL(VID_TYPE_MPEG_ENCODER, HAVE_V4L="yes", HAVE_V4L="no", [
#include <sys/types.h>
#define _LINUX_TIME_H
#include <linux/videodev.h>
])
])
dnl *** Video 4 Linux 2***
dnl for information about the header/define, see sys/v4l2/gstv4l2element.h
translit(dnm, m, l) AM_CONDITIONAL(USE_V4L2, true)
GST_CHECK_FEATURE(V4L2, [Video 4 Linux 2], v4l2src, [
AC_CHECK_HEADER(linux/videodev2.h, HAVE_V4L2="yes", HAVE_V4L2="no")
AC_MSG_CHECKING([Checking for uptodate v4l2 installation])
AC_TRY_COMPILE([
#include <sys/types.h>
#include <linux/types.h>
#define _LINUX_TIME_H
#include <linux/videodev2.h>
#if defined(V4L2_MAJOR_VERSION) || defined(V4L2_MINOR_VERSION)
#error too early v4l2 version or no v4l2 at all
#endif
], [
return 0;
], [ HAVE_V4L2="yes" && AC_MSG_RESULT(yes)],
[ HAVE_V4L2="no" && AC_MSG_RESULT(no) &&
AC_CHECK_HEADER(linux/videodev2.h,
[ AC_MSG_WARN([video4linux2 headers were found, but they're old. Please update v4l2 to compile the v4l2 plugins])],
[ AC_MSG_WARN([video4linux2 was not found])])])
])
dnl *** Video CD ***

14
sys/v4l2/gstv4l2element.h
View file

@ -21,8 +21,22 @@
#define __GST_V4L2ELEMENT_H__
#include <gst/gst.h>
/* Because of some really cool feature in video4linux1, also known as
* 'not including sys/types.h and sys/time.h', we had to include it
* ourselves. In all their intelligence, these people decided to fix
* this in the next version (video4linux2) in such a cool way that it
* breaks all compilations of old stuff...
* The real problem is actually that linux/time.h doesn't use proper
* macro checks before defining types like struct timeval. The proper
* fix here is to either fuck the kernel header (which is what we do
* by defining _LINUX_TIME_H, an innocent little hack) or by fixing it
* upstream, which I'll consider doing later on. If you get compiler
* errors here, check your linux/time.h && sys/time.h header setup.
*/
#include <sys/types.h>
#include <linux/types.h>
#define _LINUX_TIME_H
#include <linux/videodev2.h>