mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-01 06:01:04 +00:00
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*
|
|
* gstvaapivideosink.c - VA sink interface
|
|
*
|
|
* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gstvaapivideosink
|
|
* @short_description: An interface for implementing VA-API sink elements
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "gstvaapivideosink.h"
|
|
|
|
static void
|
|
gst_vaapi_video_sink_base_init(gpointer g_class)
|
|
{
|
|
static gboolean is_initialized = FALSE;
|
|
|
|
if (!is_initialized) {
|
|
is_initialized = TRUE;
|
|
}
|
|
}
|
|
|
|
GType
|
|
gst_vaapi_video_sink_get_type(void)
|
|
{
|
|
static GType iface_type = 0;
|
|
|
|
if (G_UNLIKELY(!iface_type)) {
|
|
static const GTypeInfo info = {
|
|
sizeof(GstVaapiVideoSinkInterface),
|
|
gst_vaapi_video_sink_base_init, /* base_init */
|
|
NULL, /* base_finalize */
|
|
};
|
|
|
|
iface_type = g_type_register_static(
|
|
G_TYPE_INTERFACE,
|
|
"GstVaapiVideoSink",
|
|
&info,
|
|
0
|
|
);
|
|
}
|
|
return iface_type;
|
|
}
|
|
|
|
/**
|
|
* gst_vaapi_video_sink_get_display:
|
|
* @sink: a #GstElement
|
|
*
|
|
* Returns the #GstVaapiDisplay created by the VA-API @sink element.
|
|
*
|
|
* Return value: the #GstVaapiDisplay created by the @sink element
|
|
*/
|
|
GstVaapiDisplay *
|
|
gst_vaapi_video_sink_get_display(GstVaapiVideoSink *sink)
|
|
{
|
|
g_return_val_if_fail(GST_VAAPI_IS_VIDEO_SINK(sink), NULL);
|
|
|
|
return GST_VAAPI_VIDEO_SINK_GET_INTERFACE(sink)->get_display(sink);
|
|
}
|
|
|
|
/**
|
|
* gst_vaapi_video_sink_lookup:
|
|
* @element: a #GstElement
|
|
*
|
|
* Traverses the whole downstream elements chain and finds a suitable
|
|
* #GstVaapiDisplay. This is a helper function for intermediate VA-API
|
|
* elements that don't create a #GstVaapiDisplay but require one.
|
|
* e.g. the `vaapiconvert' element.
|
|
*
|
|
* Return value: the #GstVaapiDisplay created by a downstream sink
|
|
* element, or %NULL if none was found
|
|
*/
|
|
GstVaapiVideoSink *
|
|
gst_vaapi_video_sink_lookup(GstElement *element)
|
|
{
|
|
GstVaapiVideoSink *sink = NULL;
|
|
GstPad *pad, *peer;
|
|
|
|
g_return_val_if_fail(GST_IS_ELEMENT(element), NULL);
|
|
|
|
while (!sink) {
|
|
pad = gst_element_get_static_pad(element, "src");
|
|
if (!pad)
|
|
break;
|
|
|
|
peer = gst_pad_get_peer(pad);
|
|
g_object_unref(pad);
|
|
if (!peer)
|
|
break;
|
|
|
|
element = gst_pad_get_parent_element(peer);
|
|
if (element) {
|
|
if (GST_VAAPI_IS_VIDEO_SINK(element))
|
|
sink = GST_VAAPI_VIDEO_SINK(element);
|
|
g_object_unref(element);
|
|
}
|
|
g_object_unref(peer);
|
|
}
|
|
return sink;
|
|
}
|