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 * # Children Properties:
27 * You can use the following children properties through the
28 * #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="gint"><type>gint</type></link></entry>
53 * <entry role="property_name"><link linkend="GESVideoSource--width">width</link></entry>
54 * <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>
57 * <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
58 * <entry role="property_name"><link linkend="GESVideoSource--height">height</link></entry>
59 * <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>
62 * <entry role="property_type"><link linkend="GstDeinterlaceModes"><type>GstDeinterlaceModes</type></link></entry>
63 * <entry role="property_name"><link linkend="GESVideoSource--deinterlace-mode">deinterlace-mode</link></entry>
64 * <entry>Deinterlace Mode</entry>
67 * <entry role="property_type"><link linkend="GstDeinterlaceFields"><type>GstDeinterlaceFields</type></link></entry>
68 * <entry role="property_name"><link linkend="GESVideoSource--deinterlace-fields">deinterlace-fields</link></entry>
69 * <entry>Fields to use for deinterlacing</entry>
72 * <entry role="property_type"><link linkend="GstDeinterlaceFieldLayout"><type>GstDeinterlaceFieldLayout</type></link></entry>
73 * <entry role="property_name"><link linkend="GESVideoSource--deinterlace-tff">deinterlace-tff</link></entry>
74 * <entry>Deinterlace top field first</entry>
84 #include <gst/pbutils/missing-plugins.h>
86 #include "ges-internal.h"
87 #include "ges/ges-meta-container.h"
88 #include "ges-track-element.h"
89 #include "ges-video-source.h"
90 #include "ges-layer.h"
91 #include "gstframepositioner.h"
93 #define parent_class ges_video_source_parent_class
95 struct _GESVideoSourcePrivate
97 GstFramePositioner *positioner;
98 GstElement *capsfilter;
101 G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GESVideoSource, ges_video_source,
104 /* TrackElement VMethods */
107 _set_priority (GESTimelineElement * element, guint32 priority)
110 GESVideoSource *self = GES_VIDEO_SOURCE (element);
112 res = GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_priority (element,
115 if (res && self->priv->positioner)
116 g_object_set (self->priv->positioner, "zorder", G_MAXUINT - priority, NULL);
122 post_missing_element_message (GstElement * element, const gchar * name)
126 msg = gst_missing_element_message_new (element, name);
127 gst_element_post_message (element, msg);
131 ges_video_source_create_element (GESTrackElement * trksrc)
134 GstElement *sub_element;
135 GstElement *queue = gst_element_factory_make ("queue", NULL);
136 GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_GET_CLASS (trksrc);
137 GESVideoSource *self;
138 GstElement *positioner, *videoscale, *videorate, *capsfilter, *videoconvert,
140 const gchar *positioner_props[] =
141 { "alpha", "posx", "posy", "width", "height", NULL };
142 const gchar *deinterlace_props[] = { "mode", "fields", "tff", NULL };
144 if (!source_class->create_source)
147 sub_element = source_class->create_source (trksrc);
149 self = (GESVideoSource *) trksrc;
151 /* That positioner will add metadata to buffers according to its
152 properties, acting like a proxy for our smart-mixer dynamic pads. */
153 positioner = gst_element_factory_make ("framepositioner", "frame_tagger");
154 g_object_set (positioner, "zorder",
155 G_MAXUINT - GES_TIMELINE_ELEMENT_PRIORITY (self), NULL);
158 gst_element_factory_make ("videoscale", "track-element-videoscale");
160 gst_element_factory_make ("videoconvert", "track-element-videoconvert");
161 videorate = gst_element_factory_make ("videorate", "track-element-videorate");
162 deinterlace = gst_element_factory_make ("deinterlace", "deinterlace");
164 gst_element_factory_make ("capsfilter", "track-element-capsfilter");
166 ges_frame_positioner_set_source_and_filter (GST_FRAME_POSITIONNER
167 (positioner), trksrc, capsfilter);
169 ges_track_element_add_children_props (trksrc, positioner, NULL, NULL,
172 if (deinterlace == NULL) {
173 post_missing_element_message (sub_element, "deinterlace");
175 GST_ELEMENT_WARNING (sub_element, CORE, MISSING_PLUGIN,
176 ("Missing element '%s' - check your GStreamer installation.",
177 "deinterlace"), ("deinterlacing won't work"));
179 ges_source_create_topbin ("videosrcbin", sub_element, queue,
180 videoconvert, positioner, videoscale, videorate, capsfilter, NULL);
182 ges_track_element_add_children_props (trksrc, deinterlace, NULL, NULL,
185 ges_source_create_topbin ("videosrcbin", sub_element, queue,
186 videoconvert, deinterlace, positioner, videoscale, videorate,
190 self->priv->positioner = GST_FRAME_POSITIONNER (positioner);
191 self->priv->positioner->scale_in_compositor =
192 !GES_VIDEO_SOURCE_GET_CLASS (self)->ABI.abi.disable_scale_in_compositor;
193 self->priv->capsfilter = capsfilter;
199 _lookup_child (GESTimelineElement * object,
200 const gchar * prop_name, GObject ** element, GParamSpec ** pspec)
206 if (!g_strcmp0 (prop_name, "deinterlace-fields"))
207 clean_name = g_strdup ("GstDeinterlace::fields");
208 else if (!g_strcmp0 (prop_name, "deinterlace-mode"))
209 clean_name = g_strdup ("GstDeinterlace::mode");
210 else if (!g_strcmp0 (prop_name, "deinterlace-tff"))
211 clean_name = g_strdup ("GstDeinterlace::tff");
212 else if (!g_strcmp0 (prop_name, "tff") ||
213 !g_strcmp0 (prop_name, "fields") || !g_strcmp0 (prop_name, "mode")) {
214 GST_DEBUG_OBJECT (object, "Not allowed to use GstDeinterlace %s"
215 " property without prefixing its name", prop_name);
218 clean_name = g_strdup (prop_name);
221 GES_TIMELINE_ELEMENT_CLASS (ges_video_source_parent_class)->lookup_child
222 (object, clean_name, element, pspec);
230 ges_video_source_class_init (GESVideoSourceClass * klass)
232 GESTrackElementClass *track_element_class = GES_TRACK_ELEMENT_CLASS (klass);
233 GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
234 GESVideoSourceClass *video_source_class = GES_VIDEO_SOURCE_CLASS (klass);
236 element_class->set_priority = _set_priority;
237 element_class->lookup_child = _lookup_child;
239 track_element_class->nleobject_factorytype = "nlesource";
240 track_element_class->create_element = ges_video_source_create_element;
241 video_source_class->create_source = NULL;
245 ges_video_source_init (GESVideoSource * self)
247 self->priv = ges_video_source_get_instance_private (self);
248 self->priv->positioner = NULL;
249 self->priv->capsfilter = NULL;