gstreamer/ges/ges-timeline-object.h
Edward Hervey ef7eb9efdd GESTransition: Make it a base class and add GESTimelineStandardTransition
This is to ensure people can create their own Layer Transition subclass.

API : GESTimelineTransition is now GESTimelineStandardTransition
2010-12-09 17:09:11 +01:00

247 lines
7.9 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* 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 _GES_TIMELINE_OBJECT
#define _GES_TIMELINE_OBJECT
#include <glib-object.h>
#include <gst/gst.h>
#include <ges/ges-types.h>
G_BEGIN_DECLS
#define GES_TYPE_TIMELINE_OBJECT ges_timeline_object_get_type()
#define GES_TIMELINE_OBJECT(obj) \
(G_TYPE_CHECK_INSTANCE_CAST ((obj), GES_TYPE_TIMELINE_OBJECT, GESTimelineObject))
#define GES_TIMELINE_OBJECT_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST ((klass), GES_TYPE_TIMELINE_OBJECT, GESTimelineObjectClass))
#define GES_IS_TIMELINE_OBJECT(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GES_TYPE_TIMELINE_OBJECT))
#define GES_IS_TIMELINE_OBJECT_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE ((klass), GES_TYPE_TIMELINE_OBJECT))
#define GES_TIMELINE_OBJECT_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), GES_TYPE_TIMELINE_OBJECT, GESTimelineObjectClass))
typedef struct _GESTimelineObjectPrivate GESTimelineObjectPrivate;
/**
* FillTrackObjectFunc:
* @object: the #GESTimelineObject controlling the track object
* @trobject: the #GESTrackObject
* @gnlobj: the GNonLin object that needs to be filled.
*
* A function that will be called when the GNonLin object of a corresponding
* track object needs to be filled.
*
* The implementer of this function shall add the proper #GstElement to @gnlobj
* using gst_bin_add().
*
* Returns: TRUE if the implementer succesfully filled the @gnlobj, else #FALSE.
*/
typedef gboolean (*FillTrackObjectFunc) (GESTimelineObject * object,
GESTrackObject * trobject,
GstElement * gnlobj);
/**
* CreateTrackObjectFunc:
* @object: a #GESTimelineObject
* @track: a #GESTrack
*
* Creates the 'primary' track object for this @object.
*
* Subclasses should implement this method if they only provide a
* single #GESTrackObject per track.
*
* If the subclass needs to create more than one #GESTrackObject for a
* given track, then it should implement the 'create_track_objects'
* method instead.
*
* The implementer of this function shall return the proper #GESTrackObject
* that should be controlled by @object for the given @track.
*
* The returned #GESTrackObject will be automatically added to the list
* of objects controlled by the #GESTimelineObject.
*
* Returns: the #GESTrackObject to be used, or %NULL if it can't provide one
* for the given @track.
*/
typedef GESTrackObject* (*CreateTrackObjectFunc) (GESTimelineObject * object,
GESTrack * track);
/**
* CreateTrackObjectsFunc:
* @object: a #GESTimelineObject
* @track: a #GESTrack
*
* Create all track objects this object handles for this type of track.
*
* Subclasses should implement this method if they potentially need to
* return more than one #GESTrackObject(s) for a given #GESTrack.
*
* For each object created, the subclass must call
* ges_timeline_object_add_track_object() with the newly created object
* and provided @track.
*
* Returns: %TRUE on success %FALSE on failure.
*/
typedef gboolean (*CreateTrackObjectsFunc) (GESTimelineObject * object,
GESTrack *track);
/**
* GES_TIMELINE_OBJECT_START:
* @obj: a #GESTimelineObject
*
* The start position of the object (in nanoseconds).
*/
#define GES_TIMELINE_OBJECT_START(obj) (((GESTimelineObject*)obj)->start)
/**
* GES_TIMELINE_OBJECT_INPOINT:
* @obj: a #GESTimelineObject
*
* The in-point of the object (in nanoseconds).
*/
#define GES_TIMELINE_OBJECT_INPOINT(obj) (((GESTimelineObject*)obj)->inpoint)
/**
* GES_TIMELINE_OBJECT_DURATION:
* @obj: a #GESTimelineObject
*
* The duration position of the object (in nanoseconds).
*/
#define GES_TIMELINE_OBJECT_DURATION(obj) (((GESTimelineObject*)obj)->duration)
/**
* GES_TIMELINE_OBJECT_PRIORITY:
* @obj: a #GESTimelineObject
*
* The priority of the object.
*/
#define GES_TIMELINE_OBJECT_PRIORITY(obj) (((GESTimelineObject*)obj)->priority)
/**
* GES_TIMELINE_OBJECT_HEIGHT:
* @obj: a #GESTimelineObject
*
* The span of priorities this object occupies.
*/
#define GES_TIMELINE_OBJECT_HEIGHT(obj) (((GESTimelineObject*)obj)->height)
/**
* GESTimelineObject:
*
* The #GESTimelineObject base class.
*/
struct _GESTimelineObject {
/*< private >*/
GObject parent;
GESTimelineObjectPrivate *priv;
/* We don't add those properties to the priv struct for optimization purposes
* start, inpoint, duration and fullduration are in nanoseconds */
guint64 start; /* position (in time) of the object in the layer */
guint64 inpoint; /* in-point */
guint64 duration; /* duration of the object used in the layer */
guint32 priority; /* priority of the object in the layer (0:top priority) */
guint32 height; /* the span of priorities this object needs */
guint64 fullduration; /* Full usable duration of the object (-1: no duration) */
/* Padding for API extension */
gpointer _ges_reserved[GES_PADDING];
};
/**
* GESTimelineObjectClass:
* @create_track_object: method to create a single #GESTrackObject for a given #GESTrack.
* @create_track_objects: method to create multiple #GESTrackObjects for a
* #GESTrack.
* @fill_track_object: method to fill an associated #GESTrackObject.
* @need_fill_track: Set to TRUE if @fill_track_object needs to be called.
*
* Subclasses can override the @create_track_object and @fill_track_object methods.
*/
struct _GESTimelineObjectClass {
/*< private >*/
GObjectClass parent_class;
/*< public >*/
CreateTrackObjectFunc create_track_object;
CreateTrackObjectsFunc create_track_objects;
/* FIXME : might need a release_track_object */
FillTrackObjectFunc fill_track_object;
gboolean need_fill_track;
/*< private >*/
/* Padding for API extension */
gpointer _ges_reserved[GES_PADDING];
};
GType ges_timeline_object_get_type (void);
void ges_timeline_object_set_start (GESTimelineObject * object, guint64 start);
void ges_timeline_object_set_inpoint (GESTimelineObject * object, guint64 inpoint);
void ges_timeline_object_set_duration (GESTimelineObject * object, guint64 duration);
void ges_timeline_object_set_priority (GESTimelineObject * object, guint priority);
void ges_timeline_object_set_layer (GESTimelineObject * object,
GESTimelineLayer * layer);
GESTrackObject *
ges_timeline_object_create_track_object (GESTimelineObject * object,
GESTrack * track);
gboolean ges_timeline_object_create_track_objects (GESTimelineObject *
object, GESTrack * track);
gboolean
ges_timeline_object_release_track_object (GESTimelineObject * object,
GESTrackObject * trackobject);
gboolean
ges_timeline_object_fill_track_object (GESTimelineObject * object,
GESTrackObject * trackobj,
GstElement * gnlobj);
GESTrackObject *
ges_timeline_object_find_track_object (GESTimelineObject * object,
GESTrack * track, GType type);
GList *
ges_timeline_object_get_track_objects (GESTimelineObject *object);
GESTimelineLayer *
ges_timeline_object_get_layer (GESTimelineObject *object);
gboolean
ges_timeline_object_add_track_object (GESTimelineObject *object, GESTrackObject
*trobj);
G_END_DECLS
#endif /* _GES_TIMELINE_OBJECT */