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849d6ab872
This will give us margin for API expansion without breaking ABI. The ABI restriction will only come in place once we do the first official release (i.e. 0.x.0).
232 lines
7.2 KiB
C
232 lines
7.2 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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/**
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* FillTrackObjectFunc:
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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 (*FillTrackObjectFunc) (GESTimelineObject * object,
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GESTrackObject * trobject,
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GstElement * gnlobj);
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/**
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* CreateTrackObjectFunc:
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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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* Implementors should override this function if they only interested in
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* creating a single custom track object per track.
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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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* If the @object can't support the media-type of the @track, this function
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* should return %NULL.
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*
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* Returns: the #GESTrackObject to be used, or %NULL.
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*/
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typedef GESTrackObject* (*CreateTrackObjectFunc) (GESTimelineObject * object,
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GESTrack * track);
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/**
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* CreateTrackObjectsFunc:
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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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* Returns: %TRUE on success %FALSE on failure.
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*/
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typedef gboolean (*CreateTrackObjectsFunc) (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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* @layer: the #GESTimelineLayer where this object is being used.
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*
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* The GESTimelineObject subclass. Subclasses can access these fields.
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*/
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struct _GESTimelineObject {
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GObject parent;
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/*< public >*/
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GESTimelineLayer * layer;
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/*< private >*/
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GList *trackobjects; /* A list of TrackObject controlled by this TimelineObject */
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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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* @parent_class: object parent class
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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 crate 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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GObjectClass parent_class;
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/*< public >*/
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CreateTrackObjectFunc create_track_object;
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CreateTrackObjectsFunc create_track_objects;
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/* FIXME : might need a release_track_object */
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FillTrackObjectFunc 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,
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GType type);
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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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