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247 lines
8 KiB
C
247 lines
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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*
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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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/* 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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void ges_timeline_object_set_start (GESTimelineObject * object, guint64 start);
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void ges_timeline_object_set_inpoint (GESTimelineObject * object, guint64 inpoint);
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void ges_timeline_object_set_duration (GESTimelineObject * object, guint64 duration);
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void ges_timeline_object_set_priority (GESTimelineObject * object, guint priority);
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void ges_timeline_object_set_layer (GESTimelineObject * object,
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GESTimelineLayer * layer);
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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 ges_timeline_object_create_track_objects (GESTimelineObject *
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object, 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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GESTimelineLayer *
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ges_timeline_object_get_layer (GESTimelineObject *object);
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gboolean
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ges_timeline_object_add_track_object (GESTimelineObject *object, GESTrackObject
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*trobj);
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G_END_DECLS
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#endif /* _GES_TIMELINE_OBJECT */
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