1 #include <clutter-gst/clutter-gst.h>
3 /* Setup the video texture once its size is known */
4 void size_change (ClutterActor *texture, gint width, gint height, gpointer user_data) {
6 gfloat new_x, new_y, new_width, new_height;
7 gfloat stage_width, stage_height;
8 ClutterAnimation *animation = NULL;
10 stage = clutter_actor_get_stage (texture);
14 clutter_actor_get_size (stage, &stage_width, &stage_height);
16 /* Center video on window and calculate new size preserving aspect ratio */
17 new_height = (height * stage_width) / width;
18 if (new_height <= stage_height) {
19 new_width = stage_width;
22 new_y = (stage_height - new_height) / 2;
24 new_width = (width * stage_height) / height;
25 new_height = stage_height;
27 new_x = (stage_width - new_width) / 2;
30 clutter_actor_set_position (texture, new_x, new_y);
31 clutter_actor_set_size (texture, new_width, new_height);
32 clutter_actor_set_rotation (texture, CLUTTER_Y_AXIS, 0.0, stage_width / 2, 0, 0);
34 animation = clutter_actor_animate (texture, CLUTTER_LINEAR, 10000, "rotation-angle-y", 360.0, NULL);
35 clutter_animation_set_loop (animation, TRUE);
38 int main(int argc, char *argv[]) {
39 GstElement *pipeline, *sink;
40 ClutterTimeline *timeline;
41 ClutterActor *stage, *texture;
43 /* clutter-gst takes care of initializing Clutter and GStreamer */
44 if (clutter_gst_init (&argc, &argv) != CLUTTER_INIT_SUCCESS) {
45 g_error ("Failed to initialize clutter\n");
49 stage = clutter_stage_get_default ();
52 timeline = clutter_timeline_new (1000);
53 g_object_set(timeline, "loop", TRUE, NULL);
55 /* Create new texture and disable slicing so the video is properly mapped onto it */
56 texture = CLUTTER_ACTOR (g_object_new (CLUTTER_TYPE_TEXTURE, "disable-slicing", TRUE, NULL));
57 g_signal_connect (texture, "size-change", G_CALLBACK (size_change), NULL);
59 /* Build the GStreamer pipeline */
60 pipeline = gst_parse_launch ("playbin uri=http://docs.gstreamer.com/media/sintel_trailer-480p.webm", NULL);
62 /* Instantiate the Clutter sink */
63 sink = gst_element_factory_make ("autocluttersink", NULL);
65 /* Revert to the older cluttersink, in case autocluttersink was not found */
66 sink = gst_element_factory_make ("cluttersink", NULL);
69 g_printerr ("Unable to find a Clutter sink.\n");
73 /* Link GStreamer with Clutter by passing the Clutter texture to the Clutter sink*/
74 g_object_set (sink, "texture", texture, NULL);
76 /* Add the Clutter sink to the pipeline */
77 g_object_set (pipeline, "video-sink", sink, NULL);
80 gst_element_set_state (pipeline, GST_STATE_PLAYING);
82 /* start the timeline */
83 clutter_timeline_start (timeline);
85 /* Add texture to the stage, and show it */
86 clutter_group_add (CLUTTER_GROUP (stage), texture);
87 clutter_actor_show_all (stage);
92 gst_element_set_state (pipeline, GST_STATE_NULL);
93 gst_object_unref (pipeline);