bugfix: support gstreamer 0.10 and 1.0

commit 576b20e11c24c079d944fbbfb2d8902c4b313c10 last week broke gstreamer usage with 0.10 (n-video property not present until >= 1.0), but we required 0.10. not a great idea since most distros seem to still ship 0.10 by default, which means that ALL gst image loads would always fail

legacy/evas_generic_loaders/configure.ac

@@ -147,9 +147,9 @@ if test "x$want_svg" = "xyes" ; then
 else
    have_svg=no
 fi
-GST_REQS=0.10.13
-GSTPLUG_REQS=0.10.13
-GST_MAJORMINOR=0.10
+GST_REQS=1.0
+GSTPLUG_REQS=1.0
+GST_MAJORMINOR=1.0
 
 AC_ARG_ENABLE([gstreamer],
    [AC_HELP_STRING([--disable-gstreamer], [disable gstreamer support  @<:@default==enabled@:>@])],
@@ -163,9 +163,23 @@ if test "x$want_gstreamer" = "xyes" ; then
       ],
       [have_gst="yes"],
       [have_gst="no"])
+   if test "x$have_gst" = "xno" ; then
+      GST_REQS=0.10.13
+      GSTPLUG_REQS=0.10.13
+      GST_MAJORMINOR=0.10
+      PKG_CHECK_MODULES([GSTREAMER],
+         [gstreamer-$GST_MAJORMINOR >= $GST_REQS
+          gstreamer-plugins-base-$GST_MAJORMINOR >= $GSTPLUG_REQS
+         ],
+         [have_gst="yes"
+         AC_DEFINE_UNQUOTED([USE_OLD_GST], [1], [using older gstreamer])
+         ],
+         [have_gst="no"])
+   fi
 else
    have_gst=no
 fi
+
 AM_CONDITIONAL([HAVE_GST], [test "x${have_gst}" = "xyes"])
 AM_CONDITIONAL([HAVE_PDF], [test "x${have_poppler}" = "xyes"])
 AM_CONDITIONAL([HAVE_PS],  [test "x${have_ps}" = "xyes"])

legacy/evas_generic_loaders/src/bin/gst/main.c

@@ -78,7 +78,7 @@ _gst_init(const char *filename)
         g_error_free (error);
         goto gst_shutdown;
      }
-   
+#ifndef USE_OLD_GST
    g_object_get(G_OBJECT(pipeline),
                 "n-video", &vidstr,
                 NULL);
@@ -87,7 +87,7 @@ _gst_init(const char *filename)
         D("no video stream\n");
         goto gst_shutdown;
      }
-
+#endif
    sink = gst_bin_get_by_name (GST_BIN (pipeline), "sink");
 
    ret = gst_element_set_state (pipeline, GST_STATE_PAUSED);