1 files changed, 117 insertions, 0 deletions
diff --git a/tests/examples/controller/text-color-example.c b/tests/examples/controller/text-color-example.c
new file mode 100644
index 0000000..00b3c9f
--- /dev/null
+++ b/tests/examples/controller/text-color-example.c
@@ -0,0 +1,117 @@
+/*
+ * text-color-example.c
+ *
+ * Builds a pipeline with [videotestsrc ! textoverlay ! ximagesink] and
+ * modulates color, text and text pos.
+ *
+ * Needs gst-plugin-base installed.
+ */
+
+#include <gst/gst.h>
+#include <gst/controller/gstinterpolationcontrolsource.h>
+#include <gst/controller/gstlfocontrolsource.h>
+#include <gst/controller/gstargbcontrolbinding.h>
+#include <gst/controller/gstdirectcontrolbinding.h>
+
+gint
+main (gint argc, gchar ** argv)
+{
+  gint res = 1;
+  GstElement *src, *text, *sink;
+  GstElement *bin;
+  GstControlSource *cs;
+  GstControlSource *cs_r, *cs_g, *cs_b;
+  GstClock *clock;
+  GstClockID clock_id;
+  GstClockReturn wait_ret;
+
+  gst_init (&argc, &argv);
+
+  /* build pipeline */
+  bin = gst_pipeline_new ("pipeline");
+  clock = gst_pipeline_get_clock (GST_PIPELINE (bin));
+  src = gst_element_factory_make ("videotestsrc", NULL);
+  if (!src) {
+    GST_WARNING ("need videotestsrc from gst-plugins-base");
+    goto Error;
+  }
+  g_object_set (src, "pattern", /* checkers-8 */ 10,
+      NULL);
+  text = gst_element_factory_make ("textoverlay", NULL);
+  if (!text) {
+    GST_WARNING ("need textoverlay from gst-plugins-base");
+    goto Error;
+  }
+  g_object_set (text,
+      "text", "GStreamer rocks!",
+      "font-desc", "Sans, 30", "halignment", /* position */ 4,
+      "valignment", /* position */ 3,
+      NULL);
+  sink = gst_element_factory_make ("ximagesink", NULL);
+  if (!sink) {
+    GST_WARNING ("need ximagesink from gst-plugins-base");
+    goto Error;
+  }
+
+  gst_bin_add_many (GST_BIN (bin), src, text, sink, NULL);
+  if (!gst_element_link_many (src, text, sink, NULL)) {
+    GST_WARNING ("can't link elements");
+    goto Error;
+  }
+
+  /* setup control sources */
+  cs = gst_lfo_control_source_new ();
+  g_object_set (cs,
+      "frequency", (gdouble) 0.11,
+      "amplitude", (gdouble) 0.2, "offset", (gdouble) 0.5, NULL);
+  gst_object_add_control_binding (GST_OBJECT_CAST (text),
+      gst_direct_control_binding_new (GST_OBJECT_CAST (text), "xpos", cs));
+  gst_object_unref (cs);
+
+  cs = gst_lfo_control_source_new ();
+  g_object_set (cs,
+      "frequency", (gdouble) 0.04,
+      "amplitude", (gdouble) 0.4, "offset", (gdouble) 0.5, NULL);
+  gst_object_add_control_binding (GST_OBJECT_CAST (text),
+      gst_direct_control_binding_new (GST_OBJECT_CAST (text), "ypos", cs));
+  gst_object_unref (cs);
+
+  cs_r = gst_lfo_control_source_new ();
+  g_object_set (cs_r,
+      "frequency", (gdouble) 0.19,
+      "amplitude", (gdouble) 0.5, "offset", (gdouble) 0.5, NULL);
+  cs_g = gst_lfo_control_source_new ();
+  g_object_set (cs_g,
+      "frequency", (gdouble) 0.27,
+      "amplitude", (gdouble) 0.5, "offset", (gdouble) 0.5, NULL);
+  cs_b = gst_lfo_control_source_new ();
+  g_object_set (cs_b,
+      "frequency", (gdouble) 0.13,
+      "amplitude", (gdouble) 0.5, "offset", (gdouble) 0.5, NULL);
+  gst_object_add_control_binding (GST_OBJECT_CAST (text),
+      gst_argb_control_binding_new (GST_OBJECT_CAST (text), "color", NULL,
+          cs_r, cs_g, cs_b));
+  gst_object_unref (cs_r);
+  gst_object_unref (cs_g);
+  gst_object_unref (cs_b);
+
+  /* run for 10 seconds */
+  clock_id =
+      gst_clock_new_single_shot_id (clock,
+      gst_clock_get_time (clock) + (30 * GST_SECOND));
+
+  if (gst_element_set_state (bin, GST_STATE_PLAYING)) {
+    if ((wait_ret = gst_clock_id_wait (clock_id, NULL)) != GST_CLOCK_OK) {
+      GST_WARNING ("clock_id_wait returned: %d", wait_ret);
+    }
+    gst_element_set_state (bin, GST_STATE_NULL);
+  }
+
+  /* cleanup */
+  gst_clock_id_unref (clock_id);
+  gst_object_unref (G_OBJECT (clock));
+  gst_object_unref (G_OBJECT (bin));
+  res = 0;
+Error:
+  return (res);
+}