va: meson: Update and enhance meson syntax usage.

This patch contains two updates:

1. Instead of checking for dependency already checked just to verify a
   version, we use the dependency version API.
2. Update the deprecated function get_pkgconfig_variable.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/997>

diff --git a/subprojects/gst-plugins-bad/sys/va/meson.build b/subprojects/gst-plugins-bad/sys/va/meson.build
index e7b39b5368cddddd90d3f6c04864c007bdca272c..6106b8a77fcd8ef86110c55eae8882e5395fa433 100644 (file)
--- a/subprojects/gst-plugins-bad/sys/va/meson.build
+++ b/subprojects/gst-plugins-bad/sys/va/meson.build
@@ -33,16 +33,13 @@ if not gstva_dep.found()
   subdir_done()
 endif
 
-# Keep av1 support optional as long as required libva version in gst-libs/va is < 1.8
-libva_av1_req = ['>= 1.8']
-libva_av1_dep = dependency('libva', version: libva_av1_req, required: false)
-if libva_av1_dep.found()
+if libva_dep.version().version_compare('>= 1.8')
   va_sources += 'gstvaav1dec.c'
 endif
 
 cdata.set10('HAVE_LIBDRM', libdrm_dep.found())
 
-driverdir = libva_dep.get_pkgconfig_variable('driverdir')
+driverdir = libva_dep.get_variable(pkgconfig: 'driverdir', internal: 'driverdir', default_value: '')
 if driverdir == ''
   driverdir = join_paths(get_option('prefix'), get_option('libdir'), 'dri')
 endif