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141 lines
3.7 KiB
C
141 lines
3.7 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:gessource
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* @short_description: Base Class for single-media sources
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*/
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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-source.h"
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#include "ges-layer.h"
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#include "gstframepositioner.h"
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G_DEFINE_TYPE (GESSource, ges_source, GES_TYPE_TRACK_ELEMENT);
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struct _GESSourcePrivate
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{
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/* Dummy variable */
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GstFramePositioner *positioner;
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};
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/******************************
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* Internal helper methods *
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******************************/
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static void
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_pad_added_cb (GstElement * element, GstPad * srcpad, GstPad * sinkpad)
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{
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gst_element_no_more_pads (element);
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gst_pad_link (srcpad, sinkpad);
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}
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static void
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_ghost_pad_added_cb (GstElement * element, GstPad * srcpad, GstElement * bin)
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{
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GstPad *ghost;
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ghost = gst_ghost_pad_new ("src", srcpad);
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gst_pad_set_active (ghost, TRUE);
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gst_element_add_pad (bin, ghost);
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gst_element_no_more_pads (element);
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}
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GstElement *
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ges_source_create_topbin (const gchar * bin_name, GstElement * sub_element, ...)
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{
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va_list argp;
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GstElement *element;
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GstElement *prev = NULL;
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GstElement *first = NULL;
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GstElement *bin;
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GstPad *sub_srcpad;
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va_start (argp, sub_element);
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bin = gst_bin_new (bin_name);
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gst_bin_add (GST_BIN (bin), sub_element);
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while ((element = va_arg (argp, GstElement *)) != NULL) {
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gst_bin_add (GST_BIN (bin), element);
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if (prev)
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gst_element_link (prev, element);
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prev = element;
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if (first == NULL)
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first = element;
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}
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va_end (argp);
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sub_srcpad = gst_element_get_static_pad (sub_element, "src");
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if (prev != NULL) {
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GstPad *srcpad, *sinkpad, *ghost;
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srcpad = gst_element_get_static_pad (prev, "src");
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ghost = gst_ghost_pad_new ("src", srcpad);
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gst_pad_set_active (ghost, TRUE);
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gst_element_add_pad (bin, ghost);
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sinkpad = gst_element_get_static_pad (first, "sink");
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if (sub_srcpad)
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gst_pad_link (sub_srcpad, sinkpad);
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else
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g_signal_connect (sub_element, "pad-added", G_CALLBACK (_pad_added_cb),
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sinkpad);
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gst_object_unref (srcpad);
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gst_object_unref (sinkpad);
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} else if (sub_srcpad) {
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GstPad *ghost;
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ghost = gst_ghost_pad_new ("src", sub_srcpad);
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gst_pad_set_active (ghost, TRUE);
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gst_element_add_pad (bin, ghost);
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} else {
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g_signal_connect (sub_element, "pad-added",
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G_CALLBACK (_ghost_pad_added_cb), bin);
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}
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if (sub_srcpad)
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gst_object_unref (sub_srcpad);
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return bin;
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}
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static void
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ges_source_class_init (GESSourceClass * klass)
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{
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GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
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g_type_class_add_private (klass, sizeof (GESSourcePrivate));
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track_class->nleobject_factorytype = "nlesource";
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track_class->create_element = NULL;
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}
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static void
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ges_source_init (GESSource * self)
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{
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self->priv = G_TYPE_INSTANCE_GET_PRIVATE (self,
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GES_TYPE_SOURCE, GESSourcePrivate);
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}
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