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d87578c843
Setters return values should return %FALSE **only** when the value could not be set, not when unchanged or when the subclass handled it itself! This patches makes it so the return value is meaningul by allowing subclasses return anything different than `TRUE` or `FALSE` (convention is -1) to let the subclass now that it took care of everything and no signal should be emited.
135 lines
3.8 KiB
C
135 lines
3.8 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:gessourceclip
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* @title: GESSourceClip
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* @short_description: Base Class for sources of a GESLayer
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "ges-internal.h"
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#include "ges-clip.h"
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#include "ges-source-clip.h"
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#include "ges-source.h"
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struct _GESSourceClipPrivate
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{
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/* dummy variable */
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void *nothing;
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};
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enum
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{
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PROP_0,
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};
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G_DEFINE_TYPE_WITH_PRIVATE (GESSourceClip, ges_source_clip, GES_TYPE_CLIP);
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static gboolean
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_set_start (GESTimelineElement * element, GstClockTime start)
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{
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GESTimelineElement *toplevel =
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ges_timeline_element_get_toplevel_parent (element);
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gst_object_unref (toplevel);
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if (element->timeline
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&& !ELEMENT_FLAG_IS_SET (element, GES_TIMELINE_ELEMENT_SET_SIMPLE)
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&& !ELEMENT_FLAG_IS_SET (toplevel, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
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if (!ges_timeline_move_object_simple (element->timeline, element, NULL,
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GES_EDGE_NONE, start))
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return FALSE;
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return -1;
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}
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return
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GES_TIMELINE_ELEMENT_CLASS (ges_source_clip_parent_class)->set_start
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(element, start);
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}
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static gboolean
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_set_duration (GESTimelineElement * element, GstClockTime duration)
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{
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GESTimelineElement *toplevel =
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ges_timeline_element_get_toplevel_parent (element);
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gst_object_unref (toplevel);
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if (element->timeline
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&& !ELEMENT_FLAG_IS_SET (element, GES_TIMELINE_ELEMENT_SET_SIMPLE)
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&& !ELEMENT_FLAG_IS_SET (toplevel, GES_TIMELINE_ELEMENT_SET_SIMPLE)) {
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return !timeline_trim_object (element->timeline, element,
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GES_TIMELINE_ELEMENT_LAYER_PRIORITY (element), NULL, GES_EDGE_END,
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element->start + duration);
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}
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return
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GES_TIMELINE_ELEMENT_CLASS (ges_source_clip_parent_class)->set_duration
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(element, duration);
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}
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static void
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ges_source_clip_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ges_source_clip_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (property_id) {
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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}
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}
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static void
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ges_source_clip_finalize (GObject * object)
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{
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G_OBJECT_CLASS (ges_source_clip_parent_class)->finalize (object);
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}
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static void
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ges_source_clip_class_init (GESSourceClipClass * klass)
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{
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GObjectClass *object_class = G_OBJECT_CLASS (klass);
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GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
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object_class->get_property = ges_source_clip_get_property;
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object_class->set_property = ges_source_clip_set_property;
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object_class->finalize = ges_source_clip_finalize;
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element_class->set_start = _set_start;
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element_class->set_duration = _set_duration;
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}
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static void
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ges_source_clip_init (GESSourceClip * self)
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{
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self->priv = ges_source_clip_get_instance_private (self);
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}
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