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 * @title: GESVideoSource
24 * @short_description: Base Class for video sources
26 * <refsect1 id="GESVideoSource.children_properties" role="properties">
27 * # Children Properties
28 * You can use the following children properties through the
29 * #ges_track_element_set_child_property and alike set of methods:
30 * <informaltable frame="none">
32 * <colspec colname="properties_type" colwidth="150px"/>
33 * <colspec colname="properties_name" colwidth="200px"/>
34 * <colspec colname="properties_flags" colwidth="400px"/>
37 * <entry role="property_type"><link linkend="gdouble"><type>double</type></link></entry>
38 * <entry role="property_name"><link linkend="GESVideoSource--alpha">alpha</link></entry>
39 * <entry>The desired alpha for the stream.</entry>
42 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
43 * <entry role="property_name"><link linkend="GESVideoSource--posx">posx</link></entry>
44 * <entry>The desired x position for the stream.</entry>
47 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
48 * <entry role="property_name"><link linkend="GESVideoSource--posy">posy</link></entry>
49 * <entry>The desired y position for the stream</entry>
52 * <entry role="property_type"><link linkend="guint"><type>guint</type></link></entry>
53 * <entry role="property_name"><link linkend="GESVideoSource--zorder">zorder</link></entry>
54 * <entry>The desired z order for the stream</entry>
57 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
58 * <entry role="property_name"><link linkend="GESVideoSource--width">width</link></entry>
59 * <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>
62 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
63 * <entry role="property_name"><link linkend="GESVideoSource--height">height</link></entry>
64 * <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>
67 * <entry role="property_type"><link linkend="GstDeinterlaceModes"><type>GstDeinterlaceModes</type></link></entry>
68 * <entry role="property_name"><link linkend="GESVideoSource--deinterlace-mode">deinterlace-mode</link></entry>
69 * <entry>Deinterlace Mode</entry>
72 * <entry role="property_type"><link linkend="GstDeinterlaceFields"><type>GstDeinterlaceFields</type></link></entry>
73 * <entry role="property_name"><link linkend="GESVideoSource--deinterlace-fields">deinterlace-fields</link></entry>
74 * <entry>Fields to use for deinterlacing</entry>
77 * <entry role="property_type"><link linkend="GstDeinterlaceFieldLayout"><type>GstDeinterlaceFieldLayout</type></link></entry>
78 * <entry role="property_name"><link linkend="GESVideoSource--deinterlace-tff">deinterlace-tff</link></entry>
79 * <entry>Deinterlace top field first</entry>
87 #include <gst/pbutils/missing-plugins.h>
89 #include "ges-internal.h"
90 #include "ges/ges-meta-container.h"
91 #include "ges-track-element.h"
92 #include "ges-video-source.h"
93 #include "ges-layer.h"
94 #include "gstframepositioner.h"
96 #define parent_class ges_video_source_parent_class
97 G_DEFINE_ABSTRACT_TYPE (GESVideoSource, ges_video_source, GES_TYPE_SOURCE);
99 struct _GESVideoSourcePrivate
101 GstFramePositioner *positioner;
102 GstElement *capsfilter;
105 /* TrackElement VMethods */
108 _set_priority (GESTimelineElement * element, guint32 priority)
111 GESVideoSource *self = GES_VIDEO_SOURCE (element);
113 res = GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_priority (element,
116 if (res && self->priv->positioner)
117 g_object_set (self->priv->positioner, "zorder", G_MAXUINT - priority, NULL);
123 post_missing_element_message (GstElement * element, const gchar * name)
127 msg = gst_missing_element_message_new (element, name);
128 gst_element_post_message (element, msg);
132 ges_video_source_create_element (GESTrackElement * trksrc)
135 GstElement *sub_element;
136 GstElement *queue = gst_element_factory_make ("queue", NULL);
137 GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_GET_CLASS (trksrc);
138 GESVideoSource *self;
139 GstElement *positioner, *videoscale, *videorate, *capsfilter, *videoconvert,
141 const gchar *positioner_props[] =
142 { "alpha", "posx", "posy", "width", "height", NULL };
143 const gchar *deinterlace_props[] = { "mode", "fields", "tff", NULL };
145 if (!source_class->create_source)
148 sub_element = source_class->create_source (trksrc);
150 self = (GESVideoSource *) trksrc;
152 /* That positioner will add metadata to buffers according to its
153 properties, acting like a proxy for our smart-mixer dynamic pads. */
154 positioner = gst_element_factory_make ("framepositioner", "frame_tagger");
155 g_object_set (positioner, "zorder",
156 G_MAXUINT - GES_TIMELINE_ELEMENT_PRIORITY (self), NULL);
159 gst_element_factory_make ("videoscale", "track-element-videoscale");
161 gst_element_factory_make ("videoconvert", "track-element-videoconvert");
162 videorate = gst_element_factory_make ("videorate", "track-element-videorate");
163 deinterlace = gst_element_factory_make ("deinterlace", "deinterlace");
165 gst_element_factory_make ("capsfilter", "track-element-capsfilter");
167 ges_frame_positioner_set_source_and_filter (GST_FRAME_POSITIONNER
168 (positioner), trksrc, capsfilter);
170 ges_track_element_add_children_props (trksrc, positioner, NULL, NULL,
173 if (deinterlace == NULL) {
174 post_missing_element_message (sub_element, "deinterlace");
176 GST_ELEMENT_WARNING (sub_element, CORE, MISSING_PLUGIN,
177 ("Missing element '%s' - check your GStreamer installation.",
178 "deinterlace"), ("deinterlacing won't work"));
180 ges_source_create_topbin ("videosrcbin", sub_element, queue,
181 videoconvert, positioner, videoscale, videorate, capsfilter, NULL);
183 ges_track_element_add_children_props (trksrc, deinterlace, NULL, NULL,
186 ges_source_create_topbin ("videosrcbin", sub_element, queue,
187 videoconvert, deinterlace, positioner, videoscale, videorate,
191 self->priv->positioner = GST_FRAME_POSITIONNER (positioner);
192 self->priv->positioner->scale_in_compositor =
193 !GES_VIDEO_SOURCE_GET_CLASS (self)->ABI.abi.disable_scale_in_compositor;
194 self->priv->capsfilter = capsfilter;
200 _lookup_child (GESTimelineElement * object,
201 const gchar * prop_name, GObject ** element, GParamSpec ** pspec)
207 if (!g_strcmp0 (prop_name, "deinterlace-fields"))
208 clean_name = g_strdup ("GstDeinterlace::fields");
209 else if (!g_strcmp0 (prop_name, "deinterlace-mode"))
210 clean_name = g_strdup ("GstDeinterlace::mode");
211 else if (!g_strcmp0 (prop_name, "deinterlace-tff"))
212 clean_name = g_strdup ("GstDeinterlace::tff");
213 else if (!g_strcmp0 (prop_name, "tff") ||
214 !g_strcmp0 (prop_name, "fields") || !g_strcmp0 (prop_name, "mode")) {
215 GST_DEBUG_OBJECT (object, "Not allowed to use GstDeinterlace %s"
216 " property without prefixing its name", prop_name);
219 clean_name = g_strdup (prop_name);
222 GES_TIMELINE_ELEMENT_CLASS (ges_video_source_parent_class)->lookup_child
223 (object, clean_name, element, pspec);
231 ges_video_source_class_init (GESVideoSourceClass * klass)
233 GESTrackElementClass *track_element_class = GES_TRACK_ELEMENT_CLASS (klass);
234 GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
235 GESVideoSourceClass *video_source_class = GES_VIDEO_SOURCE_CLASS (klass);
237 g_type_class_add_private (klass, sizeof (GESVideoSourcePrivate));
239 element_class->set_priority = _set_priority;
240 element_class->lookup_child = _lookup_child;
242 track_element_class->nleobject_factorytype = "nlesource";
243 track_element_class->create_element = ges_video_source_create_element;
244 video_source_class->create_source = NULL;
248 ges_video_source_init (GESVideoSource * self)
250 self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
251 GES_TYPE_VIDEO_SOURCE, GESVideoSourcePrivate);
252 self->priv->positioner = NULL;
253 self->priv->capsfilter = NULL;