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
25 * <refsect1 id="GESVideoSource.children_properties" role="properties">
26 * <title role="children_properties.title">Children Properties</title>
27 * <para>You can use the following children properties through the
28 * #ges_track_element_set_child_property and alike set of methods:</para>
29 * <informaltable frame="none">
31 * <colspec colname="properties_type" colwidth="150px"/>
32 * <colspec colname="properties_name" colwidth="200px"/>
33 * <colspec colname="properties_flags" colwidth="400px"/>
36 * <entry role="property_type"><link linkend="gdouble"><type>double</type></link></entry>
37 * <entry role="property_name"><link linkend="GESVideoSource--alpha">alpha</link></entry>
38 * <entry>The desired alpha for the stream.</entry>
41 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
42 * <entry role="property_name"><link linkend="GESVideoSource--posx">posx</link></entry>
43 * <entry>The desired x position for the stream.</entry>
46 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
47 * <entry role="property_name"><link linkend="GESVideoSource--posy">posy</link></entry>
48 * <entry>The desired y position for the stream</entry>
51 * <entry role="property_type"><link linkend="guint"><type>guint</type></link></entry>
52 * <entry role="property_name"><link linkend="GESVideoSource--zorder">zorder</link></entry>
53 * <entry>The desired z order for the stream</entry>
56 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
57 * <entry role="property_name"><link linkend="GESVideoSource--width">width</link></entry>
58 * <entry>The desired width for that source. Set to 0 if size is not mandatory, will be set to width of the current track.</entry>
61 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
62 * <entry role="property_name"><link linkend="GESVideoSource--height">height</link></entry>
63 * <entry>The desired height for that source. Set to 0 if size is not mandatory, will be set to height of the current track.</entry>
71 #include <gst/pbutils/missing-plugins.h>
73 #include "ges-internal.h"
74 #include "ges/ges-meta-container.h"
75 #include "ges-track-element.h"
76 #include "ges-video-source.h"
77 #include "ges-layer.h"
78 #include "gstframepositioner.h"
80 #define parent_class ges_video_source_parent_class
81 G_DEFINE_ABSTRACT_TYPE (GESVideoSource, ges_video_source, GES_TYPE_SOURCE);
83 struct _GESVideoSourcePrivate
85 GstFramePositioner *positioner;
86 GstElement *capsfilter;
89 /* TrackElement VMethods */
92 _set_priority (GESTimelineElement * element, guint32 priority)
95 GESVideoSource *self = GES_VIDEO_SOURCE (element);
97 res = GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_priority (element,
100 if (res && self->priv->positioner)
101 g_object_set (self->priv->positioner, "zorder", G_MAXUINT - priority, NULL);
107 post_missing_element_message (GstElement * element, const gchar * name)
111 msg = gst_missing_element_message_new (element, name);
112 gst_element_post_message (element, msg);
116 ges_video_source_create_element (GESTrackElement * trksrc)
119 GstElement *sub_element;
120 GstElement *queue = gst_element_factory_make ("queue", NULL);
121 GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_GET_CLASS (trksrc);
122 GESVideoSource *self;
123 GstElement *positioner, *videoscale, *videorate, *capsfilter, *videoconvert,
125 const gchar *props[] = { "alpha", "posx", "posy", "width", "height", NULL };
127 if (!source_class->create_source)
130 sub_element = source_class->create_source (trksrc);
132 self = (GESVideoSource *) trksrc;
134 /* That positioner will add metadata to buffers according to its
135 properties, acting like a proxy for our smart-mixer dynamic pads. */
136 positioner = gst_element_factory_make ("framepositioner", "frame_tagger");
137 g_object_set (positioner, "zorder",
138 G_MAXUINT - GES_TIMELINE_ELEMENT_PRIORITY (self), NULL);
141 gst_element_factory_make ("videoscale", "track-element-videoscale");
143 gst_element_factory_make ("videoconvert", "track-element-videoconvert");
144 videorate = gst_element_factory_make ("videorate", "track-element-videorate");
145 deinterlace = gst_element_factory_make ("deinterlace", "deinterlace");
146 if (deinterlace == NULL) {
147 deinterlace = gst_element_factory_make ("avdeinterlace", "deinterlace");
150 gst_element_factory_make ("capsfilter", "track-element-capsfilter");
152 ges_frame_positioner_set_source_and_filter (GST_FRAME_POSITIONNER
153 (positioner), trksrc, capsfilter);
155 ges_track_element_add_children_props (trksrc, positioner, NULL, NULL, props);
157 if (deinterlace == NULL) {
158 post_missing_element_message (sub_element, "deinterlace");
160 GST_ELEMENT_WARNING (sub_element, CORE, MISSING_PLUGIN,
161 ("Missing element '%s' - check your GStreamer installation.",
162 "deinterlace"), ("deinterlacing won't work"));
164 ges_source_create_topbin ("videosrcbin", sub_element, queue,
165 videoconvert, positioner, videoscale, videorate, capsfilter, NULL);
168 ges_source_create_topbin ("videosrcbin", sub_element, queue,
169 videoconvert, deinterlace, positioner, videoscale, videorate,
173 self->priv->positioner = GST_FRAME_POSITIONNER (positioner);
174 self->priv->capsfilter = capsfilter;
180 ges_video_source_class_init (GESVideoSourceClass * klass)
182 GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
183 GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
184 GESVideoSourceClass *video_source_class = GES_VIDEO_SOURCE_CLASS (klass);
186 g_type_class_add_private (klass, sizeof (GESVideoSourcePrivate));
188 element_class->set_priority = _set_priority;
190 track_class->nleobject_factorytype = "nlesource";
191 track_class->create_element = ges_video_source_create_element;
192 video_source_class->create_source = NULL;
196 ges_video_source_init (GESVideoSource * self)
198 self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
199 GES_TYPE_VIDEO_SOURCE, GESVideoSourcePrivate);
200 self->priv->positioner = NULL;
201 self->priv->capsfilter = NULL;