gstreamer/subprojects/gst-editing-services/ges/ges-layer.h

/* 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.
 */

#pragma once

#include <glib-object.h>
#include <ges/ges-types.h>

G_BEGIN_DECLS

#define GES_TYPE_LAYER ges_layer_get_type()
GES_DECLARE_TYPE(Layer, layer, LAYER);

/**
 * GESLayer:
 * @timeline: the #GESTimeline where this layer is being used.
 */
struct _GESLayer {
  GInitiallyUnowned parent;

  /*< public >*/

  GESTimeline *timeline;

  /*< protected >*/
  guint32 min_nle_priority, max_nle_priority;

  GESLayerPrivate *priv;

  /* Padding for API extension */
  gpointer _ges_reserved[GES_PADDING];
};

/**
 * GESLayerClass:
 * @get_objects: method to get the objects contained in the layer
 *
 * Subclasses can override the @get_objects if they can provide a more
 * efficient way of providing the list of contained #GESClip-s.
 */
struct _GESLayerClass {
  /*< private >*/
  GInitiallyUnownedClass parent_class;

  /*< public >*/
  /* virtual methods for subclasses */
  GList *(*get_objects) (GESLayer * layer);

  /*< private >*/
  /* Signals */
  void (*object_added) (GESLayer * layer, GESClip * object);
  void (*object_removed) (GESLayer * layer, GESClip * object);

  /* Padding for API extension */
  gpointer _ges_reserved[GES_PADDING];
};

GES_API
GESLayer*     ges_layer_new                   (void);

GES_API
void          ges_layer_set_timeline          (GESLayer * layer,
                                               GESTimeline * timeline);
GES_API
GESTimeline * ges_layer_get_timeline          (GESLayer * layer);

GES_API
gboolean      ges_layer_add_clip              (GESLayer * layer,
                                               GESClip * clip);
GES_API
gboolean      ges_layer_add_clip_full         (GESLayer * layer,
                                               GESClip * clip,
                                               GError ** error);
GES_API
GESClip *     ges_layer_add_asset             (GESLayer *layer,
                                               GESAsset *asset,
                                               GstClockTime start,
                                               GstClockTime inpoint,
                                               GstClockTime duration,
                                               GESTrackType track_types);
GES_API
GESClip *     ges_layer_add_asset_full        (GESLayer *layer,
                                               GESAsset *asset,
                                               GstClockTime start,
                                               GstClockTime inpoint,
                                               GstClockTime duration,
                                               GESTrackType track_types,
                                               GError ** error);

GES_API
gboolean      ges_layer_remove_clip           (GESLayer * layer,
                                               GESClip * clip);

GES_DEPRECATED_FOR(ges_timeline_move_layer)
void          ges_layer_set_priority          (GESLayer * layer,
                                               guint priority);

GES_API
gboolean      ges_layer_is_empty              (GESLayer * layer);

GES_API
GList*        ges_layer_get_clips_in_interval (GESLayer * layer,
                                               GstClockTime start,
                                               GstClockTime end);

GES_API
guint         ges_layer_get_priority          (GESLayer * layer);

GES_API
gboolean      ges_layer_get_auto_transition   (GESLayer * layer);

GES_API
void          ges_layer_set_auto_transition   (GESLayer * layer,
                                               gboolean auto_transition);

GES_API
GList*        ges_layer_get_clips             (GESLayer * layer);
GES_API
GstClockTime  ges_layer_get_duration          (GESLayer *layer);
GES_API
gboolean      ges_layer_set_active_for_tracks (GESLayer *layer,
                                               gboolean active,
                                               GList *tracks);

GES_API
gboolean      ges_layer_get_active_for_track  (GESLayer *layer,
                                               GESTrack *track);

G_END_DECLS