[185/906] add clutteractortee example, a nice example about how clutter could be used to create a live preview widget for gleffects. It uses texture from pixmap, still needs some work regarding clean exit and expose event management.

tests/examples/clutter/clutteractor.c

@@ -1,3 +1,25 @@
+/* 
+ * GStreamer
+ * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@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.
+ */
+
+
+
 #include <X11/Xlib.h>
 #include <X11/extensions/Xcomposite.h>
 #include <clutter/clutter.h>

tests/examples/clutter/clutteractortee.c

@@ -0,0 +1,213 @@
+/* 
+ * GStreamer
+ * Copyright (C) 2008 Filippo Argiolas <filippo.argiolas@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.
+ */
+
+#include <X11/Xlib.h>
+#include <X11/extensions/Xcomposite.h>
+#include <clutter/clutter.h>
+#include <clutter/x11/clutter-x11.h>
+#include <clutter/glx/clutter-glx.h>
+#include <gst/gst.h>
+#include <gst/interfaces/xoverlay.h>
+
+#define ROWS 3
+#define COLS 3
+#define N_ACTORS ROWS*COLS
+#define W 160
+#define H 120
+
+struct GstGLClutterActor_ {
+  Window win;
+  Window root;
+  ClutterActor *texture;
+  ClutterActor *stage;
+};
+
+typedef struct GstGLClutterActor_ GstGLClutterActor;
+
+static gboolean
+create_actor (GstGLClutterActor *actor) {
+  static gint xpos = 0;
+  static gint ypos = 0;
+  actor->texture = g_object_new (CLUTTER_GLX_TYPE_TEXTURE_PIXMAP, 
+                                 "window", actor->win,
+                                 "automatic-updates", TRUE, NULL);
+  clutter_container_add_actor (CLUTTER_CONTAINER (actor->stage), actor->texture);
+  clutter_actor_set_position (actor->texture, xpos, ypos);
+  if (xpos > (ROWS-1)*W) {
+    xpos = 0;
+    ypos += H+1;
+  } else
+    xpos += W+1;
+  clutter_actor_show (actor->texture);  
+
+  return FALSE;
+}
+
+static GstBusSyncReply
+create_window (GstBus * bus, GstMessage * message, gpointer data)
+{
+  GstGLClutterActor **actor = (GstGLClutterActor **) data;
+  static gint count = 0;
+  static GMutex *mutex = NULL;
+  // ignore anything but 'prepare-xwindow-id' element messages
+  if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
+    return GST_BUS_PASS;
+  
+  if (!gst_structure_has_name (message->structure, "prepare-xwindow-id"))
+    return GST_BUS_PASS;
+
+  if (!mutex)
+      mutex = g_mutex_new ();
+
+  g_mutex_lock (mutex);
+
+  if (count < N_ACTORS) {
+    g_message ("adding actor %d", count);
+    gst_x_overlay_set_xwindow_id (GST_X_OVERLAY (GST_MESSAGE_SRC (message)), 
+                                  actor[count]->win);
+    clutter_threads_add_idle ((GSourceFunc) create_actor, actor[count]);
+    count++;
+  }
+
+  g_mutex_unlock (mutex);
+  
+  gst_message_unref (message);
+  return GST_BUS_DROP;
+}
+
+#if 0
+void
+apply_fx (GstElement *element, const gchar *fx)
+{
+  GEnumClass *p_class;
+
+  /* from fxtest ;) */
+  /* heeeellppppp!! */
+  p_class =
+      G_PARAM_SPEC_ENUM (g_object_class_find_property (G_OBJECT_GET_CLASS
+          (G_OBJECT (data)), "effect")
+      )->enum_class;
+
+  g_print ("setting: %s - %s\n", fx, g_enum_get_value_by_nick (p_class,
+          fx)->value_name);
+  g_object_set (G_OBJECT (element), "effect", g_enum_get_value_by_nick (p_class,
+          fx)->value, NULL);
+}
+#endif
+
+int
+main (int argc, char *argv[])
+{
+  GstPipeline      *pipeline;
+  GstBus	   *bus;
+
+  GstElement *srcbin;
+  GstElement *tee;
+  GstElement *queue[N_ACTORS], *upload[N_ACTORS], *effect[N_ACTORS], *sink[N_ACTORS];
+
+  ClutterActor *stage;
+  GstGLClutterActor *actor[N_ACTORS];
+  Display *disp;
+  Window stage_win;
+  const gchar *desc;
+  gint i;
+  gint ok = FALSE;
+
+  clutter_init (&argc, &argv);
+  gst_init (&argc, &argv);
+
+  disp = clutter_x11_get_default_display ();
+  if(!clutter_x11_has_composite_extension ()) {
+    g_error ("XComposite extension missing");
+  }
+
+  stage = clutter_stage_get_default ();
+  clutter_actor_set_size (CLUTTER_ACTOR (stage), 
+                          W*ROWS + (ROWS-1), 
+                          H*COLS + (COLS-1));
+
+  stage_win = clutter_x11_get_stage_window (CLUTTER_STAGE (stage));
+
+  for (i=0; i<N_ACTORS; i++) {
+    actor[i] = g_new0 (GstGLClutterActor, 1);
+    actor[i]->stage = stage;
+    actor[i]->win = XCreateSimpleWindow (disp, stage_win, 0, 0, W, H, 0, 0, 0);
+    XCompositeRedirectWindow (disp, actor[i]->win, CompositeRedirectManual);
+    XMapRaised (disp, actor[i]->win);
+    XSync (disp, FALSE);
+  }
+/*
+  desc = g_strdup_printf ("v4l2src ! "
+                          "video/x-raw-yuv, width=640, height=480, framerate=30/1 ! "
+                          "videoscale !"
+                          "video/x-raw-yuv, width=%d, height=%d ! "
+                          "identity", W, H);
+*/
+  desc = g_strdup_printf ("videotestsrc ! "
+                          "video/x-raw-rgb, width=%d, height=%d !"
+                          "identity", W, H);
+  pipeline = GST_PIPELINE (gst_pipeline_new (NULL));
+
+  srcbin = gst_parse_bin_from_description (desc, TRUE, NULL);
+  if (!srcbin) g_error ("Source bin creation failed");
+
+  tee = gst_element_factory_make ("tee", NULL);
+
+  gst_bin_add_many (GST_BIN (pipeline), srcbin, tee, NULL);
+  
+
+  for (i=0; i<N_ACTORS; i++) {
+    queue[i] = gst_element_factory_make ("queue", NULL);
+    upload[i] = gst_element_factory_make ("glupload", NULL);
+    effect[i] = gst_element_factory_make ("gleffects", NULL);
+    sink[i] = gst_element_factory_make ("glimagesink", NULL);
+    gst_bin_add_many (GST_BIN (pipeline), 
+                      queue[i], upload[i], effect[i], sink[i], NULL);
+  }
+  
+  gst_element_link_many (srcbin, tee, NULL);
+
+  for (i=0; i<N_ACTORS; i++) {
+    ok |= gst_element_link_many (tee, queue[i], upload[i], effect[i], sink[i], NULL);
+  }
+
+  if (!ok)
+    g_error ("Failed to link one or more elements");
+  
+  for (i=0; i<N_ACTORS; i++) {
+    g_message ("setting effect %d on %s", i+1, gst_element_get_name (effect[i]));
+    g_object_set (G_OBJECT (effect[i]), "effect", i+1, NULL);
+  }
+  
+  bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
+
+  gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, actor);
+
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_PLAYING);
+
+  clutter_actor_show_all (stage);
+
+  clutter_main();
+
+  gst_element_set_state (GST_ELEMENT (pipeline), GST_STATE_NULL);
+  g_object_unref (pipeline);
+  
+  return 0;
+}