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211 lines
7.6 KiB
C
211 lines
7.6 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:gesvideosource
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* @short_description: Base Class for video sources
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*
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* <refsect1 id="GESVideoSource.children_properties" role="properties">
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* <title role="children_properties.title">Children Properties</title>
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* <para>You can use the following children properties through the
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* #ges_track_element_set_child_property and alike set of methods:</para>
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* <informaltable frame="none">
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* <tgroup cols="3">
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* <colspec colname="properties_type" colwidth="150px"/>
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* <colspec colname="properties_name" colwidth="200px"/>
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* <colspec colname="properties_flags" colwidth="400px"/>
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* <tbody>
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* <row>
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* <entry role="property_type"><link linkend="gdouble"><type>double</type></link></entry>
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* <entry role="property_name"><link linkend="GESVideoSource--alpha">alpha</link></entry>
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* <entry>The desired alpha for the stream.</entry>
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* </row>
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* <row>
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* <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
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* <entry role="property_name"><link linkend="GESVideoSource--posx">posx</link></entry>
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* <entry>The desired x position for the stream.</entry>
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* </row>
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* <row>
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* <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
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* <entry role="property_name"><link linkend="GESVideoSource--posy">posy</link></entry>
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* <entry>The desired y position for the stream</entry>
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* </row>
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* <row>
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* <entry role="property_type"><link linkend="guint"><type>guint</type></link></entry>
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* <entry role="property_name"><link linkend="GESVideoSource--zorder">zorder</link></entry>
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* <entry>The desired z order for the stream</entry>
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* </row>
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* <row>
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* <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
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* <entry role="property_name"><link linkend="GESVideoSource--width">width</link></entry>
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* <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>
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* </row>
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* <row>
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* <entry role="property_type"><link linkend="gint"><type>gint</type></link></entry>
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* <entry role="property_name"><link linkend="GESVideoSource--height">height</link></entry>
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* <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>
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* </row>
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* </tbody>
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* </tgroup>
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* </informaltable>
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* </refsect1>
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*/
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#include <gst/pbutils/missing-plugins.h>
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#include "ges-internal.h"
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#include "ges/ges-meta-container.h"
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#include "ges-track-element.h"
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#include "ges-video-source.h"
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#include "ges-layer.h"
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#include "gstframepositionner.h"
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#define parent_class ges_video_source_parent_class
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G_DEFINE_ABSTRACT_TYPE (GESVideoSource, ges_video_source, GES_TYPE_SOURCE);
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struct _GESVideoSourcePrivate
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{
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GstFramePositionner *positionner;
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GstElement *capsfilter;
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};
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/* TrackElement VMethods */
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static gboolean
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_set_priority (GESTimelineElement * element, guint32 priority)
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{
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gboolean res;
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GESVideoSource *self = GES_VIDEO_SOURCE (element);
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res = GES_TIMELINE_ELEMENT_CLASS (parent_class)->set_priority (element,
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priority);
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if (res && self->priv->positionner)
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g_object_set (self->priv->positionner, "zorder",
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G_MAXUINT - priority, NULL);
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return res;
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}
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static void
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post_missing_element_message (GstElement * element, const gchar * name)
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{
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GstMessage *msg;
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msg = gst_missing_element_message_new (element, name);
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gst_element_post_message (element, msg);
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}
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static GstElement *
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ges_video_source_create_element (GESTrackElement * trksrc)
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{
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GstElement *topbin;
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GstElement *sub_element;
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GstElement *queue = gst_element_factory_make ("queue", NULL);
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GESVideoSourceClass *source_class = GES_VIDEO_SOURCE_GET_CLASS (trksrc);
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GESVideoSource *self;
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GstElement *positionner, *videoscale, *videorate, *capsfilter, *videoconvert,
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*deinterlace;
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const gchar *props[] = { "alpha", "posx", "posy", "width", "height", NULL };
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GESTimelineElement *parent;
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if (!source_class->create_source)
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return NULL;
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sub_element = source_class->create_source (trksrc);
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self = (GESVideoSource *) trksrc;
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/* That positionner will add metadata to buffers according to its
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properties, acting like a proxy for our smart-mixer dynamic pads. */
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positionner = gst_element_factory_make ("framepositionner", "frame_tagger");
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g_object_set (positionner, "zorder",
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G_MAXUINT - GES_TIMELINE_ELEMENT_PRIORITY (self), NULL);
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videoscale =
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gst_element_factory_make ("videoscale", "track-element-videoscale");
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videoconvert =
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gst_element_factory_make ("videoconvert", "track-element-videoconvert");
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videorate = gst_element_factory_make ("videorate", "track-element-videorate");
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deinterlace = gst_element_factory_make ("deinterlace", "deinterlace");
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if (deinterlace == NULL) {
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deinterlace = gst_element_factory_make ("avdeinterlace", "deinterlace");
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}
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capsfilter =
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gst_element_factory_make ("capsfilter", "track-element-capsfilter");
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ges_frame_positionner_set_source_and_filter (GST_FRAME_POSITIONNER
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(positionner), trksrc, capsfilter);
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ges_track_element_add_children_props (trksrc, positionner, NULL, NULL, props);
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if (deinterlace == NULL) {
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post_missing_element_message (sub_element, "deinterlace");
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GST_ELEMENT_WARNING (sub_element, CORE, MISSING_PLUGIN,
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("Missing element '%s' - check your GStreamer installation.",
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"deinterlace"), ("deinterlacing won't work"));
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topbin =
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ges_source_create_topbin ("videosrcbin", sub_element, queue,
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videoconvert, positionner, videoscale, videorate, capsfilter, NULL);
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} else {
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topbin =
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ges_source_create_topbin ("videosrcbin", sub_element, queue,
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videoconvert, deinterlace, positionner, videoscale, videorate,
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capsfilter, NULL);
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}
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parent = ges_timeline_element_get_parent (GES_TIMELINE_ELEMENT (trksrc));
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if (parent) {
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self->priv->positionner = GST_FRAME_POSITIONNER (positionner);
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gst_object_unref (parent);
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} else {
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GST_ERROR ("No parent timeline element, SHOULD NOT HAPPEN");
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}
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self->priv->capsfilter = capsfilter;
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return topbin;
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}
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static void
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ges_video_source_class_init (GESVideoSourceClass * klass)
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{
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GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
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GESTimelineElementClass *element_class = GES_TIMELINE_ELEMENT_CLASS (klass);
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GESVideoSourceClass *video_source_class = GES_VIDEO_SOURCE_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GESVideoSourcePrivate));
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element_class->set_priority = _set_priority;
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track_class->nleobject_factorytype = "nlesource";
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track_class->create_element = ges_video_source_create_element;
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video_source_class->create_source = NULL;
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}
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static void
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ges_video_source_init (GESVideoSource * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
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GES_TYPE_VIDEO_SOURCE, GESVideoSourcePrivate);
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self->priv->positionner = NULL;
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self->priv->capsfilter = NULL;
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}
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