clutter-app.c

   1 /*
   2  * Based on an example from the clutter-gst package:
   3  *
   4  * video-sink.c - A small example around the videotestsrc ! warptv !
   5  *                ffmpegcolorspace ! cluttersink pipeline.
   6  *
   7  * Copyright (C) 2007,2008 OpenedHand
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the
  21  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  22  * Boston, MA 02111-1307, USA.
  23  */
  24
  25 #include <clutter-gst/clutter-gst.h>
  26 #include "app.h"
  27
  28 void
  29 size_change (ClutterTexture *texture,
  30              gfloat          width,
  31              gfloat          height,
  32              gpointer        user_data)
  33 {
  34   ClutterActor *stage;
  35   gfloat new_x, new_y, new_width, new_height;
  36   gfloat stage_width, stage_height;
  37
  38   stage = clutter_actor_get_stage (CLUTTER_ACTOR (texture));
  39   if (stage == NULL)
  40     return;
  41
  42   clutter_actor_get_size (stage, &stage_width, &stage_height);
  43
  44   new_height = (height * stage_width) / width;
  45   if (new_height <= stage_height)
  46     {
  47       new_width = stage_width;
  48
  49       new_x = 0;
  50       new_y = (stage_height - new_height) / 2;
  51     }
  52   else
  53     {
  54       new_width  = (width * stage_height) / height;
  55       new_height = stage_height;
  56
  57       new_x = (stage_width - new_width) / 2;
  58       new_y = 0;
  59     }
  60
  61   clutter_actor_set_position (CLUTTER_ACTOR (texture), new_x, new_y);
  62   clutter_actor_set_size (CLUTTER_ACTOR (texture), new_width, new_height);
  63 }
  64
  65 int
  66 main (int argc, char *argv[])
  67 {
  68   ClutterTimeline  *timeline;
  69   ClutterActor     *stage;
  70   ClutterActor     *texture;
  71
  72   if (argc < 1) {
  73           g_error ("Usage: %s", argv[0]);
  74           return 1;
  75   }
  76
  77   clutter_init (&argc, &argv);
  78   gst_init (&argc, &argv);
  79
  80   stage = clutter_stage_get_default ();
  81
  82   /* Make a timeline */
  83   timeline = clutter_timeline_new (1000);
  84   g_object_set(timeline, "loop", TRUE, NULL);
  85
  86   /* We need to set certain props on the target texture currently for
  87    * efficient/corrent playback onto the texture (which sucks a bit)
  88   */
  89   texture = g_object_new (CLUTTER_TYPE_TEXTURE,
  90                           "sync-size",       FALSE,
  91                           "disable-slicing", TRUE,
  92                           NULL);
  93
  94   g_signal_connect (CLUTTER_TEXTURE (texture),
  95                     "size-change",
  96                     G_CALLBACK (size_change), NULL);
  97
  98
  99
 100   GstElement *sink = clutter_gst_video_sink_new(CLUTTER_TEXTURE(texture));
 101
 102   GstPipeline *pipeline = make_pipeline(sink);
 103
 104   gst_element_set_state (GST_ELEMENT(pipeline), GST_STATE_PLAYING);
 105
 106   /* start the timeline */
 107   clutter_timeline_start (timeline);
 108
 109   clutter_group_add (CLUTTER_GROUP (stage), texture);
 110   // clutter_actor_set_opacity (texture, 0x11);
 111   clutter_actor_show_all (stage);
 112
 113   clutter_main();
 114
 115   return 0;
 116 }