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d5734ab94f
Those methods are meant to be used in sublassed when needed. They are not doing anything at this time, but will be used to clean some code in GESTimelineObject sublcasses.
278 lines
8.8 KiB
C
278 lines
8.8 KiB
C
/* GStreamer Editing Services
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* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
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* 2009 Nokia Corporation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef _GES_TIMELINE_OBJECT
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#define _GES_TIMELINE_OBJECT
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#include <glib-object.h>
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#include <gst/gst.h>
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#include <ges/ges-types.h>
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G_BEGIN_DECLS
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#define GES_TYPE_TIMELINE_OBJECT ges_timeline_object_get_type()
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#define GES_TIMELINE_OBJECT(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST ((obj), GES_TYPE_TIMELINE_OBJECT, GESTimelineObject))
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#define GES_TIMELINE_OBJECT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST ((klass), GES_TYPE_TIMELINE_OBJECT, GESTimelineObjectClass))
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#define GES_IS_TIMELINE_OBJECT(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE ((obj), GES_TYPE_TIMELINE_OBJECT))
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#define GES_IS_TIMELINE_OBJECT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_TYPE ((klass), GES_TYPE_TIMELINE_OBJECT))
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#define GES_TIMELINE_OBJECT_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), GES_TYPE_TIMELINE_OBJECT, GESTimelineObjectClass))
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typedef struct _GESTimelineObjectPrivate GESTimelineObjectPrivate;
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/**
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* GESFillTrackObjectFunc:
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* @object: the #GESTimelineObject controlling the track object
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* @trobject: the #GESTrackObject
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* @gnlobj: the GNonLin object that needs to be filled.
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*
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* A function that will be called when the GNonLin object of a corresponding
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* track object needs to be filled.
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*
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* The implementer of this function shall add the proper #GstElement to @gnlobj
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* using gst_bin_add().
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*
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* Returns: TRUE if the implementer succesfully filled the @gnlobj, else #FALSE.
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*/
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typedef gboolean (*GESFillTrackObjectFunc) (GESTimelineObject * object,
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GESTrackObject * trobject,
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GstElement * gnlobj);
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/**
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* GESCreateTrackObjectFunc:
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* @object: a #GESTimelineObject
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* @track: a #GESTrack
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*
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* Creates the 'primary' track object for this @object.
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*
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* Subclasses should implement this method if they only provide a
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* single #GESTrackObject per track.
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*
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* If the subclass needs to create more than one #GESTrackObject for a
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* given track, then it should implement the 'create_track_objects'
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* method instead.
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*
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* The implementer of this function shall return the proper #GESTrackObject
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* that should be controlled by @object for the given @track.
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*
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* The returned #GESTrackObject will be automatically added to the list
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* of objects controlled by the #GESTimelineObject.
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*
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* Returns: the #GESTrackObject to be used, or %NULL if it can't provide one
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* for the given @track.
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*/
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typedef GESTrackObject* (*GESCreateTrackObjectFunc) (GESTimelineObject * object,
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GESTrack * track);
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/**
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* GESCreateTrackObjectsFunc:
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* @object: a #GESTimelineObject
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* @track: a #GESTrack
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*
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* Create all track objects this object handles for this type of track.
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*
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* Subclasses should implement this method if they potentially need to
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* return more than one #GESTrackObject(s) for a given #GESTrack.
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*
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* For each object created, the subclass must call
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* ges_timeline_object_add_track_object() with the newly created object
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* and provided @track.
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*
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* Returns: %TRUE on success %FALSE on failure.
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*/
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typedef gboolean (*GESCreateTrackObjectsFunc) (GESTimelineObject * object,
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GESTrack *track);
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/**
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* GES_TIMELINE_OBJECT_START:
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* @obj: a #GESTimelineObject
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*
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* The start position of the object (in nanoseconds).
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*/
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#define GES_TIMELINE_OBJECT_START(obj) (((GESTimelineObject*)obj)->start)
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/**
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* GES_TIMELINE_OBJECT_INPOINT:
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* @obj: a #GESTimelineObject
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*
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* The in-point of the object (in nanoseconds).
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*/
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#define GES_TIMELINE_OBJECT_INPOINT(obj) (((GESTimelineObject*)obj)->inpoint)
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/**
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* GES_TIMELINE_OBJECT_DURATION:
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* @obj: a #GESTimelineObject
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*
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* The duration position of the object (in nanoseconds).
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*/
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#define GES_TIMELINE_OBJECT_DURATION(obj) (((GESTimelineObject*)obj)->duration)
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/**
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* GES_TIMELINE_OBJECT_PRIORITY:
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* @obj: a #GESTimelineObject
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*
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* The priority of the object.
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*/
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#define GES_TIMELINE_OBJECT_PRIORITY(obj) (((GESTimelineObject*)obj)->priority)
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/**
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* GES_TIMELINE_OBJECT_HEIGHT:
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* @obj: a #GESTimelineObject
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*
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* The span of priorities this object occupies.
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*/
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#define GES_TIMELINE_OBJECT_HEIGHT(obj) (((GESTimelineObject*)obj)->height)
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/**
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* GESTimelineObject:
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*
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* The #GESTimelineObject base class.
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*/
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struct _GESTimelineObject {
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/*< private >*/
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GInitiallyUnowned parent;
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GESTimelineObjectPrivate *priv;
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/* We don't add those properties to the priv struct for optimization purposes
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* start, inpoint, duration and fullduration are in nanoseconds */
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guint64 start; /* position (in time) of the object in the layer */
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guint64 inpoint; /* in-point */
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guint64 duration; /* duration of the object used in the layer */
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guint32 priority; /* priority of the object in the layer (0:top priority) */
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guint32 height; /* the span of priorities this object needs */
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guint64 fullduration; /* Full usable duration of the object (-1: no duration) */
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/* Padding for API extension */
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gpointer _ges_reserved[GES_PADDING];
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};
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/**
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* GESTimelineObjectClass:
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* @create_track_object: method to create a single #GESTrackObject for a given #GESTrack.
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* @create_track_objects: method to create multiple #GESTrackObjects for a
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* #GESTrack.
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* @fill_track_object: method to fill an associated #GESTrackObject.
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* @need_fill_track: Set to TRUE if @fill_track_object needs to be called.
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* @track_object_added: Should be overridden by subclasses if they need to perform an
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* operation when a #GESTrackObject is added.
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* @track_object_released: Should be overridden by subclassed if they need to perform
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* action when a #GESTrackObject is released.
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*
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* Subclasses can override the @create_track_object and @fill_track_object methods.
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*/
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struct _GESTimelineObjectClass {
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/*< private >*/
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GInitiallyUnownedClass parent_class;
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/*< public >*/
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GESCreateTrackObjectFunc create_track_object;
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GESCreateTrackObjectsFunc create_track_objects;
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void (*track_object_added) (GESTimelineObject *object,
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GESTrackObject *tck_object);
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void (*track_object_released) (GESTimelineObject *object,
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GESTrackObject *tck_object);
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/* FIXME : might need a release_track_object */
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GESFillTrackObjectFunc fill_track_object;
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gboolean need_fill_track;
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/*< private >*/
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/* Padding for API extension */
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gpointer _ges_reserved[GES_PADDING];
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};
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GType ges_timeline_object_get_type (void);
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/* Setters */
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void ges_timeline_object_set_start (GESTimelineObject * object,
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guint64 start);
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void ges_timeline_object_set_inpoint (GESTimelineObject * object,
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guint64 inpoint);
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void ges_timeline_object_set_duration (GESTimelineObject * object,
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guint64 duration);
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void ges_timeline_object_set_priority (GESTimelineObject * object,
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guint priority);
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void ges_timeline_object_set_layer (GESTimelineObject * object,
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GESTimelineLayer * layer);
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/* TrackObject handling */
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GESTrackObject *
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ges_timeline_object_create_track_object (GESTimelineObject * object,
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GESTrack * track);
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gboolean
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ges_timeline_object_create_track_objects (GESTimelineObject * object,
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GESTrack * track);
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gboolean
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ges_timeline_object_release_track_object (GESTimelineObject * object,
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GESTrackObject * trackobject);
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gboolean
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ges_timeline_object_fill_track_object (GESTimelineObject * object,
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GESTrackObject * trackobj,
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GstElement * gnlobj);
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GESTrackObject *
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ges_timeline_object_find_track_object (GESTimelineObject * object,
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GESTrack * track, GType type);
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GList *
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ges_timeline_object_get_track_objects (GESTimelineObject *object);
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gboolean
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ges_timeline_object_add_track_object (GESTimelineObject *object,
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GESTrackObject *trobj);
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/* Layer */
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GESTimelineLayer *
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ges_timeline_object_get_layer (GESTimelineObject *object);
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/* Effects */
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GList *
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ges_timeline_object_get_top_effects (GESTimelineObject *object);
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gint
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ges_timeline_object_get_top_effect_position (GESTimelineObject *object,
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GESTrackEffect *effect);
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gboolean
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ges_timeline_object_set_top_effect_priority (GESTimelineObject *object,
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GESTrackEffect *effect,
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guint newpriority);
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G_END_DECLS
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#endif /* _GES_TIMELINE_OBJECT */
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