gstreamer/ges/ges-timeline-object.h
2012-12-19 18:59:48 -03:00

339 lines
11 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef _GES_TIMELINE_OBJECT
#define _GES_TIMELINE_OBJECT
#include <glib-object.h>
#include <gst/gst.h>
#include <ges/ges-types.h>
#include <ges/ges-track.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;
/**
* GESFillTrackObjectFunc:
* @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 (*GESFillTrackObjectFunc) (GESTimelineObject * object,
GESTrackObject * trobject,
GstElement * gnlobj);
/**
* GESCreateTrackObjectFunc:
* @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* (*GESCreateTrackObjectFunc) (GESTimelineObject * object,
GESTrack * track);
/**
* GESCreateTrackObjectsFunc:
* @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 (*GESCreateTrackObjectsFunc) (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 {
GInitiallyUnowned parent;
/*< readonly >*/
/* A list of TrackObject controlled by this TimelineObject sorted by
* priority */
GList *trackobjects;
/* 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) */
GESAsset *asset;
/*< private >*/
GESTimelineObjectPrivate *priv;
/* Padding for API extension */
gpointer _ges_reserved[GES_PADDING_LARGE];
};
/**
* 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.
* @snaps: Set to %TRUE if the objects of this type snap with
* other objects in a timeline %FALSE otherwise (default is %FALSE). Basically only
* sources snap.
* @track_object_added: Should be overridden by subclasses if they need to perform an
* operation when a #GESTrackObject is added. Since: 0.10.2
* @track_object_released: Should be overridden by subclasses if they need to perform
* action when a #GESTrackObject is released. Since: 0.10.2
* @set_max_duration: Should be overridden by subclasses if they need to perform
* action when a changing the maximum duration. Since: 0.10.XX
*
* Subclasses can override the @create_track_object and @fill_track_object methods.
*/
struct _GESTimelineObjectClass {
/*< private >*/
GInitiallyUnownedClass parent_class;
/*< public >*/
GESCreateTrackObjectFunc create_track_object;
GESCreateTrackObjectsFunc create_track_objects;
/* FIXME : might need a release_track_object */
GESFillTrackObjectFunc fill_track_object;
gboolean need_fill_track;
gboolean snaps;
void (*track_object_added) (GESTimelineObject *object,
GESTrackObject *tck_object);
void (*track_object_released) (GESTimelineObject *object,
GESTrackObject *tck_object);
void (*set_max_duration ) (GESTimelineObject *object,
guint64 maxduration);
/*< private >*/
/* Padding for API extension */
gpointer _ges_reserved[GES_PADDING_LARGE];
};
GType ges_timeline_object_get_type (void);
/* Setters */
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_max_duration (GESTimelineObject * object,
guint64 maxduration);
void ges_timeline_object_set_priority (GESTimelineObject * object,
guint priority);
guint64 ges_timeline_object_get_max_duration (GESTimelineObject * object);
void ges_timeline_object_set_layer (GESTimelineObject * object,
GESTimelineLayer * layer);
/* TrackObject handling */
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);
gboolean
ges_timeline_object_add_track_object (GESTimelineObject *object,
GESTrackObject *trobj);
/* Layer */
GESTimelineLayer *
ges_timeline_object_get_layer (GESTimelineObject *object);
gboolean
ges_timeline_object_move_to_layer (GESTimelineObject *object,
GESTimelineLayer *layer);
gboolean
ges_timeline_object_is_moving_from_layer (GESTimelineObject *object);
void
ges_timeline_object_set_moving_from_layer (GESTimelineObject * object,
gboolean is_moving);
/* Effects */
GList *
ges_timeline_object_get_top_effects (GESTimelineObject *object);
gint
ges_timeline_object_get_top_effect_position (GESTimelineObject *object,
GESTrackEffect *effect);
gboolean
ges_timeline_object_set_top_effect_priority (GESTimelineObject *object,
GESTrackEffect *effect,
guint newpriority);
GESTrackType
ges_timeline_object_get_supported_formats (GESTimelineObject * object);
void
ges_timeline_object_set_supported_formats (GESTimelineObject * object,
GESTrackType supportedformats);
GESTimelineObject *
ges_timeline_object_split (GESTimelineObject * object, guint64 position);
gboolean
ges_timeline_object_edit (GESTimelineObject * object,
GList *layers, gint new_layer_priority,
GESEditMode mode, GESEdge edge,
guint64 position);
void
ges_timeline_object_objects_set_locked (GESTimelineObject * object, gboolean locked);
gboolean ges_timeline_object_ripple (GESTimelineObject *object,
guint64 start);
gboolean ges_timeline_object_ripple_end (GESTimelineObject *object,
guint64 end);
gboolean ges_timeline_object_roll_start (GESTimelineObject *object,
guint64 start);
gboolean ges_timeline_object_roll_end (GESTimelineObject *object,
guint64 end);
gboolean ges_timeline_object_trim_start (GESTimelineObject *object,
guint64 start);
G_END_DECLS
#endif /* _GES_TIMELINE_OBJECT */