gstreamer/ges/ges-source.c
Thibault Saunier 0be8bc9d98 ges: Avoid adding unnecessary converters for nested timelines
Basically we know that if we are using mixing, compositor will be
able to do video conversion and scaling for us, so avoid adding those
usless elements.

This optimizes a lot caps negotiation for deeply nested timelines.
2020-02-12 17:50:37 -03:00

161 lines
4.4 KiB
C

/* GStreamer Editing Services
* Copyright (C) 2009 Edward Hervey <edward.hervey@collabora.co.uk>
* 2009 Nokia Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:gessource
* @title: GESSource
* @short_description: Base Class for single-media sources
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "ges-internal.h"
#include "ges/ges-meta-container.h"
#include "ges-track-element.h"
#include "ges-source.h"
#include "ges-layer.h"
#include "gstframepositioner.h"
struct _GESSourcePrivate
{
/* Dummy variable */
GstFramePositioner *positioner;
};
G_DEFINE_TYPE_WITH_PRIVATE (GESSource, ges_source, GES_TYPE_TRACK_ELEMENT);
/******************************
* Internal helper methods *
******************************/
static void
_pad_added_cb (GstElement * element, GstPad * srcpad, GstPad * sinkpad)
{
GstPadLinkReturn res;
gst_element_no_more_pads (element);
res = gst_pad_link (srcpad, sinkpad);
#ifndef GST_DISABLE_GST_DEBUG
if (res != GST_PAD_LINK_OK) {
GstCaps *srccaps = NULL;
GstCaps *sinkcaps = NULL;
srccaps = gst_pad_query_caps (srcpad, NULL);
sinkcaps = gst_pad_query_caps (sinkpad, NULL);
GST_WARNING_OBJECT (element, "Could not link source with "
"conversion bin: %s (srcpad caps %" GST_PTR_FORMAT
" sinkpad caps: %" GST_PTR_FORMAT ")",
gst_pad_link_get_name (res), srccaps, sinkcaps);
gst_caps_unref (srccaps);
gst_caps_unref (sinkcaps);
}
#endif
}
static void
_ghost_pad_added_cb (GstElement * element, GstPad * srcpad, GstElement * bin)
{
GstPad *ghost;
ghost = gst_ghost_pad_new ("src", srcpad);
gst_pad_set_active (ghost, TRUE);
gst_element_add_pad (bin, ghost);
gst_element_no_more_pads (element);
}
GstElement *
ges_source_create_topbin (const gchar * bin_name, GstElement * sub_element,
GPtrArray * elements)
{
GstElement *element;
GstElement *prev = NULL;
GstElement *first = NULL;
GstElement *bin;
GstPad *sub_srcpad;
gint i;
bin = gst_bin_new (bin_name);
gst_bin_add (GST_BIN (bin), sub_element);
for (i = 0; i < elements->len; i++) {
element = elements->pdata[i];
gst_bin_add (GST_BIN (bin), element);
if (prev) {
if (!gst_element_link_pads_full (prev, "src", element, "sink",
GST_PAD_LINK_CHECK_NOTHING)) {
g_error ("Could not link %s and %s",
GST_OBJECT_NAME (prev), GST_OBJECT_NAME (element));
}
}
prev = element;
if (first == NULL)
first = element;
}
sub_srcpad = gst_element_get_static_pad (sub_element, "src");
if (prev != NULL) {
GstPad *srcpad, *sinkpad, *ghost;
srcpad = gst_element_get_static_pad (prev, "src");
ghost = gst_ghost_pad_new ("src", srcpad);
gst_pad_set_active (ghost, TRUE);
gst_element_add_pad (bin, ghost);
sinkpad = gst_element_get_static_pad (first, "sink");
if (sub_srcpad)
gst_pad_link_full (sub_srcpad, sinkpad, GST_PAD_LINK_CHECK_NOTHING);
else
g_signal_connect (sub_element, "pad-added", G_CALLBACK (_pad_added_cb),
sinkpad);
gst_object_unref (srcpad);
gst_object_unref (sinkpad);
} else if (sub_srcpad) {
GstPad *ghost;
ghost = gst_ghost_pad_new ("src", sub_srcpad);
gst_pad_set_active (ghost, TRUE);
gst_element_add_pad (bin, ghost);
} else {
g_signal_connect (sub_element, "pad-added",
G_CALLBACK (_ghost_pad_added_cb), bin);
}
if (sub_srcpad)
gst_object_unref (sub_srcpad);
return bin;
}
static void
ges_source_class_init (GESSourceClass * klass)
{
GESTrackElementClass *track_class = GES_TRACK_ELEMENT_CLASS (klass);
track_class->nleobject_factorytype = "nlesource";
track_class->create_element = NULL;
}
static void
ges_source_init (GESSource * self)
{
self->priv = ges_source_get_instance_private (self);
}