Add untested get-video-size function (bug 104360)

Original commit message from CVS:
Add untested get-video-size function (bug 104360)

gst-libs/gst/video/video.c

@@ -49,6 +49,39 @@ gst_video_frame_rate (GstPad *pad)
   return fps;
 }
 
+gboolean
+gst_video_get_size (GstPad *pad,
+                    gint   *width,
+                    gint   *height)
+{
+  GstCaps *caps;
+
+  g_return_val_if_fail(pad != NULL, FALSE);
+
+  caps = GST_PAD_CAPS(pad);
+  if (!caps) {
+    g_warning("gstvideo: failed to get caps of pad %s:%s",
+              GST_ELEMENT_NAME(gst_pad_get_parent (pad)), GST_PAD_NAME(pad));
+    return FALSE;
+  }
+  if (!gst_caps_has_property(caps, "width") ||
+      !gst_caps_has_property(caps, "height")) {
+    g_warning("gstvideo: resulting caps doesn't have width/height properties");
+    return FALSE;
+  }
+
+  if (width)
+    gst_caps_get_int(caps, "width", width);
+  if (height)
+    gst_caps_get_int(caps, "height", height);
+
+  GST_DEBUG(GST_CAT_ELEMENT_PADS, "size request on pad %s:%s: %dx%d",
+	    GST_ELEMENT_NAME(gst_pad_get_parent (pad)), GST_PAD_NAME(pad),
+            width?*width:0, height?*height:0);
+
+  return TRUE;
+}
+
 static gboolean
 plugin_init (GModule *module, GstPlugin *plugin)
 {

gst-libs/gst/video/video.h

@@ -24,5 +24,8 @@
 #include <gst/gst.h>
 
 gdouble  gst_video_frame_rate (GstPad *pad);
+gboolean gst_video_get_size   (GstPad *pad,
+                               gint   *width,
+                               gint   *height);
 
 #endif /* __GST_VIDEO_H__ */