+dnl *** Jack ***
+translit(dnm, m, l) AM_CONDITIONAL(USE_JACK, true)
+GST_CHECK_FEATURE(JACK, Jack, jack, [
+ PKG_CHECK_MODULES(JACK, jack, HAVE_JACK="yes", HAVE_JACK="no")
+ AC_SUBST(JACK_CFLAGS)
+ AC_SUBST(JACK_LIBS)
+])
+
+dnl *** jpeg ***
+dnl FIXME: we could use header checks here as well IMO
+translit(dnm, m, l) AM_CONDITIONAL(USE_JPEG, true)
+GST_CHECK_FEATURE(JPEG, [jpeg], jpegenc jpegdec, [
+ AC_CHECK_LIB(jpeg, jpeg_set_defaults, HAVE_JPEG="yes", HAVE_JPEG="no")
+ JPEG_LIBS="-ljpeg"
+ AC_SUBST(JPEG_LIBS)
+])
+