1 /* GStreamer Editing Services
2 * Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
3 * 2009 Nokia Corporation
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
22 * SECTION:gesvideosource
23 * @short_description: Base Class for video sources
26 #include <gst/pbutils/missing-plugins.h>
28 #include "ges-internal.h"
29 #include "ges/ges-meta-container.h"
30 #include "ges-track-element.h"
31 #include "ges-video-source.h"
32 #include "ges-layer.h"
33 #include "gstframepositionner.h"
35 G_DEFINE_ABSTRACT_TYPE (GESVideoSource, ges_video_source, GES_TYPE_SOURCE);
37 struct _GESVideoSourcePrivate
39 GstFramePositionner *positionner;
40 GstElement *capsfilter;
44 /* TrackElement VMethods */
46 layer_priority_changed_cb (GESLayer * layer, GParamSpec * arg G_GNUC_UNUSED,
47 GESVideoSource * self)
49 g_object_set (self->priv->positionner, "zorder",
50 10000 - ges_layer_get_priority (layer), NULL);
54 layer_changed_cb (GESClip * clip, GParamSpec * arg G_GNUC_UNUSED,
55 GESVideoSource * self)
57 GESVideoSourcePrivate *priv = self->priv;
60 g_signal_handlers_disconnect_by_func (priv->layer,
61 layer_priority_changed_cb, self);
64 priv->layer = ges_clip_get_layer (clip);
65 if (priv->layer == NULL)
68 /* We do not need any ref ourself as our parent owns one and we are connected
70 g_object_unref (priv->layer);
71 /* 10000 is the max value of zorder on videomixerpad, hardcoded */
72 g_signal_connect (self->priv->layer, "notify::priority",
73 G_CALLBACK (layer_priority_changed_cb), self);
75 g_object_set (self->priv->positionner, "zorder",
76 10000 - ges_layer_get_priority (self->priv->layer), NULL);
80 post_missing_element_message (GstElement * element, const gchar * name)
84 msg = gst_missing_element_message_new (element, name);
85 gst_element_post_message (element, msg);
89 ges_video_source_create_element (GESTrackElement * trksrc)
92 GstElement *sub_element;
93 GstElement *queue = gst_element_factory_make ("queue", NULL);
94 GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_GET_CLASS (trksrc);
96 GstElement *positionner, *videoscale, *videorate, *capsfilter, *videoconvert,
98 const gchar *props[] = { "alpha", "posx", "posy", "width", "height", NULL };
99 GESTimelineElement *parent;
101 if (!source_class->create_source)
104 sub_element = source_class->create_source (trksrc);
106 self = (GESVideoSource *) trksrc;
108 /* That positionner will add metadata to buffers according to its
109 properties, acting like a proxy for our smart-mixer dynamic pads. */
110 positionner = gst_element_factory_make ("framepositionner", "frame_tagger");
113 gst_element_factory_make ("videoscale", "track-element-videoscale");
115 gst_element_factory_make ("videoconvert", "track-element-videoconvert");
116 videorate = gst_element_factory_make ("videorate", "track-element-videorate");
117 deinterlace = gst_element_factory_make ("deinterlace", "deinterlace");
118 if (deinterlace == NULL) {
119 deinterlace = gst_element_factory_make ("avdeinterlace", "deinterlace");
122 gst_element_factory_make ("capsfilter", "track-element-capsfilter");
124 ges_frame_positionner_set_source_and_filter (GST_FRAME_POSITIONNER
125 (positionner), trksrc, capsfilter);
127 ges_track_element_add_children_props (trksrc, positionner, NULL, NULL, props);
129 if (deinterlace == NULL) {
130 post_missing_element_message (sub_element, "deinterlace");
132 GST_ELEMENT_WARNING (sub_element, CORE, MISSING_PLUGIN,
133 ("Missing element '%s' - check your GStreamer installation.",
134 "deinterlace"), ("deinterlacing won't work"));
136 ges_source_create_topbin ("videosrcbin", sub_element, queue,
137 videoconvert, positionner, videoscale, videorate, capsfilter, NULL);
140 ges_source_create_topbin ("videosrcbin", sub_element, queue,
141 videoconvert, deinterlace, positionner, videoscale, videorate,
145 parent = ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (trksrc));
147 self->priv->positionner = GST_FRAME_POSITIONNER (positionner);
148 g_signal_connect (parent, "notify::layer",
149 (GCallback) layer_changed_cb, trksrc);
150 layer_changed_cb (GES_CLIP (parent), NULL, self);
151 gst_object_unref (parent);
153 GST_ERROR ("No parent timeline element, SHOULD NOT HAPPEN");
156 self->priv->capsfilter = capsfilter;
162 _set_parent (GESTimelineElement * self, GESTimelineElement * parent)
164 GESVideoSourcePrivate *priv = GES_VIDEO_SOURCE (self)->priv;
168 g_signal_handlers_disconnect_by_func (priv->layer,
169 layer_priority_changed_cb, self);
173 g_signal_handlers_disconnect_by_func (self->parent, layer_changed_cb, self);
176 if (parent && priv->positionner)
177 layer_changed_cb (GES_CLIP (parent), NULL, GES_VIDEO_SOURCE (self));
184 ges_video_source_class_init (GESVideoSourceClass * klass)
186 GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
187 GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
188 GESVideoSourceClass *video_source_class = GES_VIDEO_SOURCE_CLASS (klass);
190 g_type_class_add_private (klass, sizeof (GESVideoSourcePrivate));
192 element_class->set_parent = _set_parent;
193 track_class->nleobject_factorytype = "nlesource";
194 track_class->create_element = ges_video_source_create_element;
195 video_source_class->create_source = NULL;
199 ges_video_source_init (GESVideoSource * self)
201 self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
202 GES_TYPE_VIDEO_SOURCE, GESVideoSourcePrivate);
203 self->priv->positionner = NULL;
204 self->priv->capsfilter = NULL;