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Bug 639339 - v4l2: fails to build with older kernels due to missing V4L_FIELD_INTERLACED_{TB,BT}
v4l2: fails to build with older kernels due to missing V4L_FIELD_INTERLACED_{...
Status: RESOLVED FIXED
Product: GStreamer
Classification: Platform
Component: gst-plugins-good
git master
Other Linux
: Normal normal
: 0.10.27
Assigned To: GStreamer Maintainers
GStreamer Maintainers
Depends on:
Blocks:
 
 
Reported: 2011-01-12 18:17 UTC by Leo Singer
Modified: 2011-01-12 22:45 UTC
See Also:
GNOME target: ---
GNOME version: ---

Attachments
/usr/include/linux/videodev2.h from my CentOS 5 box (39.25 KB, text/plain)
2011-01-12 18:43 UTC, Leo Singer 		Details

Description Leo Singer 2011-01-12 18:17:22 UTC 
With the latest pre-releases, I cannot build the v4l2 plugin on CentOS 5 (x86-64).  Here is the error message:

gstv4l2object.c: In function ‘gst_v4l2_object_get_nearest_size’:
gstv4l2object.c:1987: error: ‘V4L2_FIELD_INTERLACED_TB’ undeclared (first use in this function)
gstv4l2object.c:1987: error: (Each undeclared identifier is reported only once
gstv4l2object.c:1987: error: for each function it appears in.)
gstv4l2object.c:1988: error: ‘V4L2_FIELD_INTERLACED_BT’ undeclared (first use in this function)
gstv4l2bufferpool.c: In function ‘gst_v4l2_buffer_pool_dqbuf’:
gstv4l2bufferpool.c:565: error: ‘V4L2_FIELD_INTERLACED_TB’ undeclared (first use in this function)
gstv4l2bufferpool.c:565: error: (Each undeclared identifier is reported only once
gstv4l2bufferpool.c:565: error: for each function it appears in.)
gstv4l2bufferpool.c:567: error: ‘V4L2_FIELD_INTERLACED_BT’ undeclared (first use in this function)
make[2]: *** [libgstvideo4linux2_la-gstv4l2object.lo] Error 1

An easy workaround is to configure with --disable-gst_v4l2.
Comment 1 Tim-Philipp Müller 2011-01-12 18:38:20 UTC 
Could you attach your /usr/include/linux/videodev2.h please?
Comment 2 Leo Singer 2011-01-12 18:43:14 UTC 
Created attachment 178166 [details]
/usr/include/linux/videodev2.h from my CentOS 5 box
Comment 3 Leo Singer 2011-01-12 18:44:03 UTC 
(In reply to comment #1)
> Could you attach your /usr/include/linux/videodev2.h please?

Attached.
Comment 4 Tim-Philipp Müller 2011-01-12 22:45:42 UTC 
This should fix it:

 commit 9dcb60822f2befa8d5eeee7d927681a7406427fc
 Author: Tim-Philipp Müller <tim.muller@collabora.co.uk>
 Date:   Wed Jan 12 20:38:59 2011 +0000

    v4l2: define V4L2_FIELD_INTERLACED_{TB,BT} if not available in header
    
    Older kernels don't have these, and there's no easy way to check for the
    existance of enums that doesn't involve a configure check, so just define
    these if the V4L2_CAP_VIDEO_OUTPUT_OVERLAY define is not there, which was
    added in the same commit as the TB/BT enum. Fixes compilation on CentOS 5.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=639339