--- /dev/null
+/* GStreamer interactive videoscale test
+ * Copyright (C) 2008 Wim Taymans <wim.taymans@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdlib.h>
+
+#include <gst/gst.h>
+
+#define CAPS " capsfilter caps=\"video/x-raw-yuv, format=(fourcc)I420, width=(int)640, height=(int)480\" "
+
+static GstElement *
+make_pipeline (gint type)
+{
+ GstElement *result;
+ gchar *pstr;
+
+ switch (type) {
+ case 0:
+ pstr =
+ g_strdup_printf ("videotestsrc ! " CAPS
+ " ! videobox name=box ! videoscale ! " CAPS
+ " ! ffmpegcolorspace ! ximagesink");
+ break;
+ default:
+ return NULL;
+ }
+
+ result = gst_parse_launch_full (pstr, NULL, GST_PARSE_FLAG_NONE, NULL);
+ g_print ("created test %d: \"%s\"\n", type, pstr);
+ g_free (pstr);
+
+ return result;
+}
+
+#define MAX_ROUND 100
+
+int
+main (int argc, char **argv)
+{
+ GstElement *pipe, *filter;
+ gint left, right;
+ gint top, bottom;
+ gint rdir, ldir;
+ gint tdir, bdir;
+ gint round, type, stop;
+
+ gst_init (&argc, &argv);
+
+ type = 0;
+ stop = -1;
+
+ if (argc > 1) {
+ type = atoi (argv[1]);
+ stop = type + 1;
+ }
+
+ while (TRUE) {
+ GstMessage *message;
+
+ pipe = make_pipeline (type);
+ if (pipe == NULL)
+ break;
+
+ filter = gst_bin_get_by_name (GST_BIN (pipe), "box");
+ g_assert (filter);
+
+ /* start with no borders or cropping */
+ left = right = top = bottom = 0;
+ rdir = ldir = tdir = bdir = -10;
+
+ for (round = 0; round < MAX_ROUND; round++) {
+ g_print ("box to %dx%d %dx%d (%d/%d) \r", left, right, top, bottom,
+ round, MAX_ROUND);
+
+ g_object_set (filter, "left", left, "right", right, "top", top, "bottom",
+ bottom, NULL);
+
+ if (round == 0)
+ gst_element_set_state (pipe, GST_STATE_PLAYING);
+
+ left += ldir;
+ if (left >= 40)
+ ldir = -10;
+ else if (left < -30)
+ ldir = 10;
+
+ right += rdir;
+ if (right >= 30)
+ rdir = -10;
+ else if (right < -20)
+ rdir = 10;
+
+ top += tdir;
+ if (top >= 20)
+ tdir = -10;
+ else if (top < -30)
+ tdir = 10;
+
+ bottom += bdir;
+ if (bottom >= 60)
+ bdir = -10;
+ else if (bottom < -40)
+ bdir = 10;
+
+ message =
+ gst_bus_poll (GST_ELEMENT_BUS (pipe), GST_MESSAGE_ERROR,
+ 50 * GST_MSECOND);
+ if (message) {
+ g_print ("got error \n");
+
+ gst_message_unref (message);
+ }
+ }
+ g_print ("test %d done \n", type);
+
+ gst_object_unref (filter);
+ gst_element_set_state (pipe, GST_STATE_NULL);
+ gst_object_unref (pipe);
+
+ type++;
+ if (type == stop)
+ break;
+ }
+ return 0;
+}