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Tim-Philipp Müller authored
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
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