[clutter-gst] examples: Add navigation test to video-sink

[Damien Lespiau <dlespiau src gnome org>]

commit ec47b12559150a1085401df1cd16317269653109
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Apr 5 01:14:40 2011 +0100

    examples: Add navigation test to video-sink
    
    http://bugzilla.clutter-project.org/show_bug.cgi?id=2624

 examples/Makefile.am             |   15 +++-
 examples/video-sink-navigation.c |  136 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 147 insertions(+), 4 deletions(-)
---
diff --git a/examples/Makefile.am b/examples/Makefile.am
index c76864b..4cd466b 100644
--- a/examples/Makefile.am
+++ b/examples/Makefile.am
@@ -1,6 +1,6 @@
 NULL = #
 
-noinst_PROGRAMS = video-player video-sink
+noinst_PROGRAMS = video-player video-sink video-sink-navigation
 
 INCLUDES = -I$(top_srcdir) \
 	   $(MAINTAINER_CFLAGS) \
@@ -11,16 +11,23 @@ video_player_CFLAGS = $(CLUTTER_GST_CFLAGS) $(GST_CFLAGS)
 video_player_LDFLAGS = \
     $(CLUTTER_GST_LIBS) \
     $(GST_LIBS)   \
-    $(top_builddir)/clutter-gst/libclutter-gst- CLUTTER_GST_MAJORMINOR@.la 
+    $(top_builddir)/clutter-gst/libclutter-gst- CLUTTER_GST_MAJORMINOR@.la
 
 video_sink_SOURCES = video-sink.c
 video_sink_CFLAGS = $(CLUTTER_GST_CFLAGS) $(GST_CFLAGS)
 video_sink_LDFLAGS = \
     $(CLUTTER_GST_LIBS) \
     $(GST_LIBS)   \
-    $(top_builddir)/clutter-gst/libclutter-gst- CLUTTER_GST_MAJORMINOR@.la 
+    $(top_builddir)/clutter-gst/libclutter-gst- CLUTTER_GST_MAJORMINOR@.la
+
+video_sink_navigation_SOURCES = video-sink-navigation.c
+video_sink_navigation_CFLAGS = $(CLUTTER_GST_CFLAGS) $(GST_CFLAGS)
+video_sink_navigation_LDFLAGS = \
+    $(CLUTTER_GST_LIBS) \
+    $(GST_LIBS)   \
+    $(top_builddir)/clutter-gst/libclutter-gst- CLUTTER_GST_MAJORMINOR@.la
 
 EXTRA_DIST = media-actions-pause.png  \
              media-actions-start.png  \
              vid-panel.png            \
-             README 
+             README
diff --git a/examples/video-sink-navigation.c b/examples/video-sink-navigation.c
new file mode 100644
index 0000000..b5d7f77
--- /dev/null
+++ b/examples/video-sink-navigation.c
@@ -0,0 +1,136 @@
+/*
+ * Clutter-GStreamer.
+ *
+ * GStreamer integration library for Clutter.
+ *
+ * video-sink.c - A small example around the videotestsrc ! capsfilter !
+ *                navigationtest ! ffmpegcolorspace ! cluttersink pipeline.
+ *
+ * Copyright (C) 2007,2008 OpenedHand
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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 <clutter-gst/clutter-gst.h>
+
+void
+size_change (ClutterTexture *texture,
+             gint            width,
+             gint            height,
+             gpointer        user_data)
+{
+  ClutterActor *stage;
+  gfloat new_x, new_y, new_width, new_height;
+  gfloat stage_width, stage_height;
+
+  stage = clutter_actor_get_stage (CLUTTER_ACTOR (texture));
+  if (stage == NULL)
+    return;
+
+  clutter_actor_get_size (stage, &stage_width, &stage_height);
+
+  new_height = (height * stage_width) / width;
+  if (new_height <= stage_height)
+    {
+      new_width = stage_width;
+
+      new_x = 0;
+      new_y = (stage_height - new_height) / 2;
+    }
+  else
+    {
+      new_width  = (width * stage_height) / height;
+      new_height = stage_height;
+
+      new_x = (stage_width - new_width) / 2;
+      new_y = 0;
+    }
+
+  clutter_actor_set_position (CLUTTER_ACTOR (texture), new_x, new_y);
+  clutter_actor_set_size (CLUTTER_ACTOR (texture), new_width, new_height);
+}
+
+int
+main (int argc, char *argv[])
+{
+  ClutterTimeline  *timeline;
+  ClutterActor     *stage;
+  ClutterActor     *texture;
+  ClutterConstraint *constraint;
+  GstPipeline      *pipeline;
+  GstElement       *src;
+  GstElement       *filter;
+  GstElement       *test;
+  GstElement       *colorspace;
+  GstElement       *sink;
+
+  if (argc < 1) {
+          g_error ("Usage: %s", argv[0]);
+          return 1;
+  }
+
+  clutter_init (&argc, &argv);
+  gst_init (&argc, &argv);
+
+  stage = clutter_stage_get_default ();
+  clutter_stage_set_user_resizable (CLUTTER_STAGE (stage), TRUE);
+
+  /* Make a timeline */
+  timeline = clutter_timeline_new (1000);
+  g_object_set(timeline, "loop", TRUE, NULL);
+
+  /* We need to set certain props on the target texture currently for
+   * efficient/corrent playback onto the texture (which sucks a bit)
+  */
+  texture = g_object_new (CLUTTER_TYPE_TEXTURE,
+			  "disable-slicing", TRUE,
+			  NULL);
+
+  g_signal_connect (CLUTTER_TEXTURE (texture),
+		    "size-change",
+		    G_CALLBACK (size_change), NULL);
+
+  /* Set up pipeline */
+  pipeline = GST_PIPELINE(gst_pipeline_new (NULL));
+
+  src = gst_parse_launch ("videotestsrc", NULL);
+  filter = gst_parse_launch ("capsfilter caps=video/x-raw-yuv,pixel-aspect-ratio=1/4", NULL);
+
+  test = gst_element_factory_make ("navigationtest", NULL);
+  colorspace = gst_element_factory_make ("ffmpegcolorspace", NULL);
+  sink = clutter_gst_video_sink_new (CLUTTER_TEXTURE (texture));
+
+  // g_object_set (src , "pattern", 10, NULL);
+
+  gst_bin_add_many (GST_BIN (pipeline), src, filter, test, colorspace, sink, NULL);
+  gst_element_link_many (src, filter, test, colorspace, sink, NULL);
+  gst_element_set_state (GST_ELEMENT(pipeline), GST_STATE_PLAYING);
+
+  /* Resize with the window */
+  constraint = clutter_bind_constraint_new (stage, CLUTTER_BIND_SIZE, 0.0);
+  clutter_actor_add_constraint_with_name (texture, "size", constraint);
+
+  /* start the timeline */
+  clutter_timeline_start (timeline);
+
+  clutter_group_add (CLUTTER_GROUP (stage), texture);
+  // clutter_actor_set_opacity (texture, 0x11);
+  clutter_actor_show_all (stage);
+
+  clutter_main();
+
+  return 0;
+}