Initial revision

Original commit message from CVS:
Initial revision

12 files changed, 830 insertions, 0 deletions

diff --git a/docs/random/design b/docs/random/design
new file mode 100644
index 0000000..8ae512e
--- /dev/null
+++ b/docs/random/design
@@ -0,0 +1,56 @@
+GnlSource:
+  - extends from a GstBin
+  - consist of a single GStreamer pipeline with M output pads
+  - have a start and stop time
+  - have one or more output pads, ghosted from the Gst pipeline
+
+GnlLayer:
+  - extends GnlSource
+  - contains sources
+  - sources cannot overlap
+  - sources have start/length properties inside the layer
+
+GnlComposition:
+  - extends GnlLayer
+  - can contain GnlLayers, possibly overlapping
+
+GnlOperation:
+  - extends GnlSource
+  - also ghosts N input pads in addition to the GnlSources output pads
+
+
+ .-0----->-----------5000----->------10000----->-----15000---.
+ ! main_timeline                                             !
+ !                                                           !
+ ! .- composition -----------------------------------------. !
+ ! !                                                       ! !
+ ! ! .- layer1 ------------------------------------------. ! !
+ ! ! !                                                   ! ! !
+ ! ! !                .- operation ---.                  ! ! !
+ ! ! !                !               !                  ! ! !
+ ! ! !                ! blend         !                  ! ! !
+ ! ! !                '---------------'                  ! ! !
+ ! ! '---------------------------------------------------' ! !
+ ! ! .- layer2 ------------------------------------------. ! !
+ ! ! !                                                   ! ! !
+ ! ! ! .-- source1 -------------------.                  ! ! !
+ ! ! ! !                              !                  ! ! !
+ ! ! ! ! /myfile.avi                  !                  ! ! !
+ ! ! ! '------------------------------'                  ! ! !
+ ! ! '---------------------------------------------------' ! !
+ ! ! .- layer3 ------------------------------------------. ! !
+ ! ! !                .- source2 ---------------------.  ! ! !
+ ! ! !                !                               !  ! ! !
+ ! ! !                ! /myfile2.avi                  !  ! ! !
+ ! ! !                '-------------------------------'  ! ! !
+ ! ! '---------------------------------------------------' ! !
+ ! '-------------------------------------------------------' ! 
+ '-----------------------------------------------------------'
+
+  
+
+      *****		(alpha blend 2 layers)
+===========
+      *********		(monochrome 1 layer)
+      =========
+      
diff --git a/docs/random/srctree b/docs/random/srctree
new file mode 100644
index 0000000..5655322
--- /dev/null
+++ b/docs/random/srctree
@@ -0,0 +1,7 @@
+
+src/   		- core source files
+
+test/  		- test apps
+
+gui/   		- gui stuff
+    widgets/ 	- usefull widgets.
diff --git a/gnl/gnlcomposition.h b/gnl/gnlcomposition.h
new file mode 100644
index 0000000..fd570b2
--- /dev/null
+++ b/gnl/gnlcomposition.h
@@ -0,0 +1,71 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * gnlcomposition.h: Header for base GnlComposition
+ *
+ * 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.
+ */
+
+
+#ifndef __GNL_COMPOSITION_H__
+#define __GNL_COMPOSITION_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GNL_TYPE_COMPOSITION \
+  (gnl_composition_get_type())
+#define GNL_COMPOSITION(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GNL_TYPE_COMPOSITION,GnlComposition))
+#define GNL_COMPOSITION_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GNL_TYPE_COMPOSITION,GnlCompositionClass))
+#define GNL_IS_COMPOSITION(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GNL_TYPE_COMPOSITION))
+#define GNL_IS_COMPOSITION_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GNL_TYPE_COMPOSITION))
+
+typedef struct _GnlComposition GnlComposition;
+typedef struct _GnlCompositionClass GnlCompositionClass;
+
+struct _GnlComposition {
+  GnlLayer layer;
+
+};
+
+struct _GnlCompositionClass {
+  GnlLayerClass	parent_class;
+};
+
+/* normal GComposition stuff */
+GType			gnl_composition_get_type	(void);
+GnlComposition*		gnl_composition_new		(const gchar *name);
+
+void			gnl_composition_add_layer	(GnlComposition *composition,
+							 GnlLayer *layer, guin64 start);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GNL_COMPOSITION_H__ */
+
diff --git a/gnl/gnllayer.c b/gnl/gnllayer.c
new file mode 100644
index 0000000..6de83cb
--- /dev/null
+++ b/gnl/gnllayer.c
@@ -0,0 +1,84 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * 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 <gnl/gnllayer.h>
+
+static void 		gnl_layer_class_init 		(GnlLayerClass *klass);
+static void 		gnl_layer_init 			(GnlLayer *layer);
+
+static GnlLayerClass *parent_class = NULL;
+
+GType
+gnl_layer_get_type (void)
+{
+  static GType layer_type = 0;
+
+  if (!layer_type) {
+    static const GTypeInfo layer_info = {
+      sizeof (GnlLayerClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gnl_layer_class_init,
+      NULL,
+      NULL,
+      sizeof (GnlLayer),
+      32,
+      (GInstanceInitFunc) gnl_layer_init,
+    };
+    layer_type = g_type_register_static (G_TYPE_OBJECT, "GnlLayer", &layer_info, 0);
+  }
+  return object_type;
+}
+
+static void
+gnl_layer_class_init (GnlLayerClass *klass)
+{
+  GObjectClass *gobject_class;
+
+  gobject_class =       (GObjectClass*)klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_BIN);
+}
+
+
+static void
+gnl_layer_init (GnlLayer *layer)
+{
+}
+
+
+GnlLayer*
+gnl_layer_new (const gchar *name)
+{
+  return NULL;
+}
+
+void
+gnl_layer_add_source (GnlLayer *layer, GnlSource *source, guint64 start)
+{
+  g_return_if_fail (layer != NULL);
+  g_return_if_fail (GNL_IS_LAYER (layer));
+  g_return_if_fail (source != NULL);
+  g_return_if_fail (GNL_IS_SOURCE (source));
+
+}
+
+
diff --git a/gnl/gnllayer.h b/gnl/gnllayer.h
new file mode 100644
index 0000000..31b6b78
--- /dev/null
+++ b/gnl/gnllayer.h
@@ -0,0 +1,70 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * gnllayer.h: Header for base GnlLayer
+ *
+ * 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.
+ */
+
+
+#ifndef __GNL_LAYER_H__
+#define __GNL_LAYER_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GNL_TYPE_LAYER \
+  (gnl_layer_get_type())
+#define GNL_LAYER(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GNL_TYPE_LAYER,GnlLayer))
+#define GNL_LAYER_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GNL_TYPE_LAYER,GnlLayerClass))
+#define GNL_IS_LAYER(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GNL_TYPE_LAYER))
+#define GNL_IS_LAYER_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GNL_TYPE_LAYER))
+
+typedef struct _GnlLayer GnlLayer;
+typedef struct _GnlLayerClass GnlLayerClass;
+
+struct _GnlLayer {
+  GnlSource	source;
+
+  GList		*sources;
+};
+
+struct _GnlLayerClass {
+  GnlSourceClass	parent_class;
+};
+
+GType		gnl_layer_get_type		(void);
+GnlLayer*	gnl_layer_new			(void);
+
+void		gnl_layer_add_source 		(GnlLayer *layer, GnlSource *source, guint64 start);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GNL_LAYER_H__ */
+
diff --git a/gnl/gnlobject.h b/gnl/gnlobject.h
new file mode 100644
index 0000000..f32ce92
--- /dev/null
+++ b/gnl/gnlobject.h
@@ -0,0 +1,94 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * gnlobject.h: Header for base GnlObject
+ *
+ * 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.
+ */
+
+
+#ifndef __GNL_OBJECT_H__
+#define __GNL_OBJECT_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#ifdef USE_GLIB2
+#include <glib-object.h>	// note that this gets wrapped in __GNL_OBJECT_H__ 
+#include <gnl/gnlmarshal.h>
+#else
+#include <gnl/gobject2gtk.h>
+#endif
+
+#include <gnl/gnltrace.h>
+#include <parser.h>
+
+#include <gnl/gnltypes.h>
+
+#ifdef HAVE_ATOMIC_H
+#include <asm/atomic.h>
+#endif
+
+// FIXME
+#include "gnllog.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GNL_TYPE_OBJECT \
+  (gnl_object_get_type())
+#define GNL_OBJECT(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GNL_TYPE_OBJECT,GnlObject))
+#define GNL_OBJECT_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GNL_TYPE_OBJECT,GnlObjectClass))
+#define GNL_IS_OBJECT(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GNL_TYPE_OBJECT))
+#define GNL_IS_OBJECT_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GNL_TYPE_OBJECT))
+
+//typedef struct _GnlObject GnlObject;
+//typedef struct _GnlObjectClass GnlObjectClass;
+//
+typedef enum
+{
+  GNL_DESTROYED   = 0,
+  GNL_FLOATING,
+
+  GNL_OBJECT_FLAG_LAST   = 4,
+} GnlObjectFlags;
+
+struct _GnlObject {
+  GstObject object;
+};
+
+struct _GnlObjectClass {
+  GstObjectClass	parent_class;
+};
+
+/* normal GObject stuff */
+GType		gnl_object_get_type		(void);
+GnlObject*	gnl_object_new			(void);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GNL_OBJECT_H__ */
+
diff --git a/gnl/gnlsource.c b/gnl/gnlsource.c
new file mode 100644
index 0000000..bfa2c08
--- /dev/null
+++ b/gnl/gnlsource.c
@@ -0,0 +1,98 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * 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 <gnl/gnlsource.h>
+
+static void 		gnl_source_class_init 		(GnlSourceClass *klass);
+static void 		gnl_source_init 		(GnlSource *source);
+
+static GnlTrackClass *parent_class = NULL;
+
+GType
+gnl_source_get_type (void)
+{
+  static GType source_type = 0;
+
+  if (!source_type) {
+    static const GTypeInfo source_info = {
+      sizeof (GnlSourceClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gnl_source_class_init,
+      NULL,
+      NULL,
+      sizeof (GnlSource),
+      32,
+      (GInstanceInitFunc) gnl_source_init,
+    };
+    source_type = g_type_register_static (G_TYPE_OBJECT, "GnlSource", &source_info, 0);
+  }
+  return object_type;
+}
+
+static void
+gnl_source_class_init (GnlSourceClass *klass)
+{
+  GObjectClass *gobject_class;
+
+  gobject_class =       (GObjectClass*)klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_BIN);
+}
+
+
+static void
+gnl_source_init (GnlSource *source)
+{
+}
+
+
+GnlSource*
+gnl_source_new (const gchar *name)
+{
+  return NULL;
+}
+
+void
+gnl_source_set_element (GnlSource *source, GstElement *element)
+{
+  g_return_if_fail (element != NULL);
+  g_return_if_fail (GST_IS_ELEMENT (element));
+  g_return_if_fail (source != NULL);
+  g_return_if_fail (GNL_IS_SOURCE (source));
+  g_return_if_fail (source->bin == NULL);
+
+  source->bin = element;
+}
+
+void
+gnl_source_set_start_stop (GnlSource *source, guint64 start, guint64 stop)
+{
+  g_return_if_fail (source != NULL);
+  g_return_if_fail (GNL_IS_SOURCE (source));
+  g_return_if_fail (start < stop);
+
+  source->start = start;
+  source->stop = stop;
+  
+}
+
+
diff --git a/gnl/gnlsource.h b/gnl/gnlsource.h
new file mode 100644
index 0000000..d715446
--- /dev/null
+++ b/gnl/gnlsource.h
@@ -0,0 +1,76 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * gnlsource.h: Header for base GnlSource
+ *
+ * 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.
+ */
+
+
+#ifndef __GNL_SOURCE_H__
+#define __GNL_SOURCE_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GNL_TYPE_SOURCE \
+  (gnl_source_get_type())
+#define GNL_SOURCE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GNL_TYPE_SOURCE,GnlSource))
+#define GNL_SOURCE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GNL_TYPE_SOURCE,GnlSourceClass))
+#define GNL_IS_SOURCE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GNL_TYPE_SOURCE))
+#define GNL_IS_SOURCE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GNL_TYPE_SOURCE))
+
+typedef struct _GnlSource GnlSource;
+typedef struct _GnlSourceClass GnlSourceClass;
+
+struct _GnlSource {
+  GstBin bin;
+
+  guint64 start;
+  guint64 stop;
+
+  GstElement *source;
+
+};
+
+struct _GnlSourceClass {
+  GstBinClass	parent_class;
+};
+
+/* normal GSource stuff */
+GType		gnl_source_get_type		(void);
+GnlSource*	gnl_source_new			(const gchar *name);
+
+void		gnl_source_set_element		(GnlSource *source, GstElement *element);
+void		gnl_source_set_start_stop	(GnlSource *source, guint64 start, guint64 stop);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GNL_SOURCE_H__ */
+
diff --git a/gnl/gnltimeline.c b/gnl/gnltimeline.c
new file mode 100644
index 0000000..98649db
--- /dev/null
+++ b/gnl/gnltimeline.c
@@ -0,0 +1,74 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * 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 <gnl/gnltimeline.h>
+
+static void 		gnl_timeline_class_init 	(GnlTimelineClass *klass);
+static void 		gnl_timeline_init 		(GnlTimeline *timeline);
+
+static GnlTrackClass *parent_class = NULL;
+
+GType
+gnl_timeline_get_type (void)
+{
+  static GType timeline_type = 0;
+
+  if (!timeline_type) {
+    static const GTypeInfo timeline_info = {
+      sizeof (GnlTimelineClass),
+      NULL,
+      NULL,
+      (GClassInitFunc) gnl_timeline_class_init,
+      NULL,
+      NULL,
+      sizeof (GnlTimeline),
+      4,
+      (GInstanceInitFunc) gnl_timeline_init,
+    };
+    timeline_type = g_type_register_static (G_TYPE_OBJECT, "GnlTimeline", &timeline_info, 0);
+  }
+  return object_type;
+}
+
+static void
+gnl_timeline_class_init (GnlTimelineClass *klass)
+{
+  GObjectClass *gobject_class;
+
+  gobject_class =       (GObjectClass*)klass;
+
+  parent_class = g_type_class_ref (GNL_TYPE_TRACK);
+}
+
+
+static void
+gnl_timeline_init (GnlTimeline *timeline)
+{
+}
+
+
+GnlTimeline*
+gnl_timeline_new (const gchar *name)
+{
+  return NULL;
+}
+
+
diff --git a/gnl/gnltimeline.h b/gnl/gnltimeline.h
new file mode 100644
index 0000000..b4fbd5c
--- /dev/null
+++ b/gnl/gnltimeline.h
@@ -0,0 +1,67 @@
+/* GStreamer
+ * Copyright (C) 2001 Wim Taymans <wim.taymans@chello.be>
+ *
+ * gnltimeline.h: Header for base GnlTimeline
+ *
+ * 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.
+ */
+
+
+#ifndef __GNL_TIMELINE_H__
+#define __GNL_TIMELINE_H__
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+#define GNL_TYPE_TIMELINE \
+  (gnl_timeline_get_type())
+#define GNL_TIMELINE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GNL_TYPE_TIMELINE,GnlTimeline))
+#define GNL_TIMELINE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GNL_TYPE_TIMELINE,GnlTimelineClass))
+#define GNL_IS_TIMELINE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GNL_TYPE_TIMELINE))
+#define GNL_IS_TIMELINE_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GNL_TYPE_TIMELINE))
+
+typedef struct _GnlTimeline GnlTimeline;
+typedef struct _GnlTimelineClass GnlTimelineClass;
+
+struct _GnlTimeline {
+  GnlTrack 		track;
+
+};
+
+struct _GnlTimelineClass {
+  GnlTrackClass		parent_class;
+};
+
+GType		gnl_timeline_get_type		(void);
+GnlTimeline*	gnl_timeline_new		(const gchar *name);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+
+#endif /* __GNL_TIMELINE_H__ */
+
diff --git a/test/composition.c b/test/composition.c
new file mode 100644
index 0000000..6f17ae3
--- /dev/null
+++ b/test/composition.c
@@ -0,0 +1,81 @@
+
+#include <gnl/gnl.h>
+
+/*
+ 
+ .-0----->-----------5000----->------10000----->-----15000---.
+ ! main_timeline                                             !
+ !                                                           !
+ ! .- composition -----------------------------------------. !
+ ! !                                                       ! !
+ ! ! .- layer1 ------------------------------------------. ! !
+ ! ! !                                                   ! ! !
+ ! ! !                .- operation ---.                  ! ! !
+ ! ! !                !               !                  ! ! !
+ ! ! !                ! blend         !                  ! ! !
+ ! ! !                '---------------'                  ! ! !
+ ! ! '---------------------------------------------------' ! !
+ ! ! .- layer2 ------------------------------------------. ! !
+ ! ! !                                                   ! ! !
+ ! ! ! .-- source1 -------------------.                  ! ! !
+ ! ! ! !                              !                  ! ! !
+ ! ! ! ! /myfile.avi                  !                  ! ! !
+ ! ! ! '------------------------------'                  ! ! !
+ ! ! '---------------------------------------------------' ! !
+ ! ! .- layer3 ------------------------------------------. ! !
+ ! ! !                .- source2 ---------------------.  ! ! !
+ ! ! !                !                               !  ! ! !
+ ! ! !                ! /myfile2.avi                  !  ! ! !
+ ! ! !                '-------------------------------'  ! ! !
+ ! ! '---------------------------------------------------' ! !
+ ! '-------------------------------------------------------' !
+ '-----------------------------------------------------------'
+*/
+
+int
+main (int argc, gchar *argv[]) 
+{
+  GnlTimeline *timeline;
+  GnlComposition *composition;
+  GnlTrack *layer;
+  GnlSource *source1, *source2;
+
+  gnl_init (&argc, &argv);
+
+  timeline = gnl_timeline_new ("main_timeline");
+
+  source1 = gnl_source_new ("my_source1")
+  gnl_source_set_element (source1, element1);
+  gnl_source_set_start_stop (source1, 0, 10000);
+
+  source2 = gnl_source_new ("my_source2");
+  gnl_source_set_element (source2, element2);
+  gnl_source_set_start_stop (source2, 0, 10000);
+
+  blend = gnl_operation_new ("blend");
+  gnl_source_set_element (blend, blend_element);
+  gnl_source_set_start_stop (source2, 0, 5000);
+
+  composition = gnl_composition_new ("my_composition");
+  gnl_source_set_start_stop (GNL_SOURCE (composition), 0, 5000);
+
+  layer1 = gnl_layer_new ("layer1");
+  gnl_layer_add_source (layer1, blend, 5000);
+  layer2 = gnl_layer_new ("layer2");
+  gnl_layer_add_source (layer2, source1, 0);
+  layer3 = gnl_layer_new ("layer3");
+  gnl_layer_add_source (layer3, source2, 5000);
+
+  gnl_composition_append_layer (composition, layer1);
+  gnl_composition_append_layer (composition, layer2);
+  gnl_composition_append_layer (composition, layer3);
+
+  gnl_timeline_add_composition (timeline, composition);
+
+  gst_element_set_state (GST_ELEMENT (timeline), GST_STATE_PLAYING);
+
+  while (gst_bin_iterate (GST_BIN (timeline)));
+  
+  gst_element_set_state (GST_ELEMENT (timeline), GST_STATE_NULL);
+   
+}
diff --git a/test/simple.c b/test/simple.c
new file mode 100644
index 0000000..293b9df
--- /dev/null
+++ b/test/simple.c
@@ -0,0 +1,52 @@
+
+#include <gnl/gnl.h>
+
+/*
+ (-0----->-----------5000----->------10000----->-----15000-)
+ ! main_timeline                                           !
+ !                                                         !
+ ! (-----------------------------------------------------) !
+ ! ! my_track                                            ! !
+ ! ! (-------------------------------)                   ! !
+ ! ! ! source1                       !                   ! !
+ ! ! !                               !                   ! !
+ ! ! (-------------------------------)                   ! !
+ ! !                  (-------------------------------)  ! !
+ ! !                  ! source2                       !  ! !
+ ! !                  !                               !  ! !
+ ! !                  (-------------------------------)  ! !
+ ! (-----------------------------------------------------) !
+ !                                                         !
+ (---------------------------------------------------------)
+*/
+
+int
+main (int argc, gchar *argv[]) 
+{
+  GnlTimeline *timeline;
+  GnlTrack *track;
+  GnlSource *source1, *source2;
+
+  timeline = gnl_timeline_new ("main_timeline");
+
+  source1 = gnl_source_new_from_pipeline ("my_source1", bin1);
+  gnl_source_set_start_time (source1, 0);
+  gnl_source_set_end_time (source1, 10000);
+
+  source2 = gnl_source_new_from_pipeline ("my_source2", bin2);
+  gnl_source_set_start_time (source2, 0);
+  gnl_source_set_end_time (source2, 10000);
+
+  track = gnl_track_new ("my_track");
+  gnl_track_add_source (track, source1, 0);
+  gnl_track_add_source (track, source2, 5000);
+
+  gnl_timeline_add_track (timeline, track);
+
+  gst_element_set_state (GST_ELEMENT (timeline), GST_STATE_PLAYING);
+
+  while (gst_bin_iterate (GST_BIN (timeline)));
+  
+  gst_element_set_state (GST_ELEMENT (timeline), GST_STATE_NULL);
+   
+}