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95 lines
3.1 KiB
C
95 lines
3.1 KiB
C
#include <clutter-gst/clutter-gst.h>
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/* Setup the video texture once its size is known */
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void size_change (ClutterActor *texture, gint width, gint height, gpointer user_data) {
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ClutterActor *stage;
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gfloat new_x, new_y, new_width, new_height;
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gfloat stage_width, stage_height;
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ClutterAnimation *animation = NULL;
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stage = clutter_actor_get_stage (texture);
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if (stage == NULL)
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return;
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clutter_actor_get_size (stage, &stage_width, &stage_height);
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/* Center video on window and calculate new size preserving aspect ratio */
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new_height = (height * stage_width) / width;
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if (new_height <= stage_height) {
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new_width = stage_width;
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new_x = 0;
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new_y = (stage_height - new_height) / 2;
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} else {
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new_width = (width * stage_height) / height;
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new_height = stage_height;
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new_x = (stage_width - new_width) / 2;
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new_y = 0;
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}
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clutter_actor_set_position (texture, new_x, new_y);
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clutter_actor_set_size (texture, new_width, new_height);
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clutter_actor_set_rotation (texture, CLUTTER_Y_AXIS, 0.0, stage_width / 2, 0, 0);
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/* Animate it */
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animation = clutter_actor_animate (texture, CLUTTER_LINEAR, 10000, "rotation-angle-y", 360.0, NULL);
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clutter_animation_set_loop (animation, TRUE);
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}
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int main(int argc, char *argv[]) {
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GstElement *pipeline, *sink;
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ClutterTimeline *timeline;
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ClutterActor *stage, *texture;
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/* clutter-gst takes care of initializing Clutter and GStreamer */
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if (clutter_gst_init (&argc, &argv) != CLUTTER_INIT_SUCCESS) {
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g_error ("Failed to initialize clutter\n");
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return -1;
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}
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stage = clutter_stage_get_default ();
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/* Make a timeline */
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timeline = clutter_timeline_new (1000);
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g_object_set(timeline, "loop", TRUE, NULL);
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/* Create new texture and disable slicing so the video is properly mapped onto it */
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texture = CLUTTER_ACTOR (g_object_new (CLUTTER_TYPE_TEXTURE, "disable-slicing", TRUE, NULL));
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g_signal_connect (texture, "size-change", G_CALLBACK (size_change), NULL);
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/* Build the GStreamer pipeline */
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pipeline = gst_parse_launch ("playbin uri=https://www.freedesktop.org/software/gstreamer-sdk/data/media/sintel_trailer-480p.webm", NULL);
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/* Instantiate the Clutter sink */
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sink = gst_element_factory_make ("autocluttersink", NULL);
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if (sink == NULL) {
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/* Revert to the older cluttersink, in case autocluttersink was not found */
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sink = gst_element_factory_make ("cluttersink", NULL);
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}
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if (sink == NULL) {
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g_printerr ("Unable to find a Clutter sink.\n");
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return -1;
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}
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/* Link GStreamer with Clutter by passing the Clutter texture to the Clutter sink*/
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g_object_set (sink, "texture", texture, NULL);
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/* Add the Clutter sink to the pipeline */
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g_object_set (pipeline, "video-sink", sink, NULL);
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/* Start playing */
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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/* start the timeline */
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clutter_timeline_start (timeline);
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/* Add texture to the stage, and show it */
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clutter_group_add (CLUTTER_GROUP (stage), texture);
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clutter_actor_show_all (stage);
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clutter_main();
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/* Free resources */
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gst_element_set_state (pipeline, GST_STATE_NULL);
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gst_object_unref (pipeline);
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return 0;
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}
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