mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-27 02:30:35 +00:00
108 lines
3 KiB
C
108 lines
3 KiB
C
/*
|
|
* gstvaapiutils_gst.c - GST utilties
|
|
*
|
|
* gstreamer-vaapi (C) 2010 Splitted-Desktop Systems
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public License
|
|
* as published by the Free Software Foundation; either version 2.1
|
|
* 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free
|
|
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "gstvaapiutils_gst.h"
|
|
#include "gstvaapivideosink.h"
|
|
#include "gstvaapivideobuffer.h"
|
|
|
|
#define DEBUG 1
|
|
#include "gstvaapidebug.h"
|
|
|
|
static GstVaapiDisplay *
|
|
lookup_through_vaapisink_iface(GstElement *element)
|
|
{
|
|
GstVaapiDisplay *display;
|
|
GstVaapiVideoSink *sink;
|
|
|
|
GST_DEBUG("looking for a downstream vaapisink");
|
|
|
|
/* Look for a downstream vaapisink */
|
|
sink = gst_vaapi_video_sink_lookup(element);
|
|
if (!sink)
|
|
return NULL;
|
|
|
|
display = gst_vaapi_video_sink_get_display(sink);
|
|
GST_DEBUG(" found display %p", display);
|
|
return display;
|
|
}
|
|
|
|
static GstVaapiDisplay *
|
|
lookup_through_peer_buffer(GstElement *element)
|
|
{
|
|
GstVaapiDisplay *display;
|
|
GstPad *pad;
|
|
GstBuffer *buffer;
|
|
GstFlowReturn ret;
|
|
|
|
GST_DEBUG("looking for a GstVaapiVideoBuffer from peer");
|
|
|
|
/* Lookup for a GstVaapiVideoBuffer from peer */
|
|
pad = gst_element_get_static_pad(element, "src");
|
|
if (!pad)
|
|
return NULL;
|
|
|
|
buffer = NULL;
|
|
ret = gst_pad_alloc_buffer(pad, 0, 0, GST_PAD_CAPS(pad), &buffer);
|
|
g_object_unref(pad);
|
|
if (ret != GST_FLOW_OK || !buffer)
|
|
return NULL;
|
|
|
|
display = GST_VAAPI_IS_VIDEO_BUFFER(buffer) ?
|
|
gst_vaapi_video_buffer_get_display(GST_VAAPI_VIDEO_BUFFER(buffer)) :
|
|
NULL;
|
|
gst_buffer_unref(buffer);
|
|
|
|
GST_DEBUG(" found display %p", display);
|
|
return display;
|
|
}
|
|
|
|
/**
|
|
* gst_vaapi_display_lookup_downstream:
|
|
* @element: a #GstElement
|
|
*
|
|
* Finds a suitable #GstVaapiDisplay downstream from @element.
|
|
*
|
|
* 1. Check whether a downstream element implements the
|
|
* #GstVaapiVideoSinkInterface interface.
|
|
*
|
|
* 2. Check whether the @element peer implements a custom
|
|
* buffer_alloc() function that allocates #GstVaapiVideoBuffer
|
|
* buffers.
|
|
*
|
|
* Return value: a downstream allocated #GstVaapiDisplay object, or
|
|
* %NULL if none was found
|
|
*/
|
|
GstVaapiDisplay *
|
|
gst_vaapi_display_lookup_downstream(GstElement *element)
|
|
{
|
|
GstVaapiDisplay *display;
|
|
|
|
display = lookup_through_vaapisink_iface(element);
|
|
if (display)
|
|
return display;
|
|
|
|
display = lookup_through_peer_buffer(element);
|
|
if (display)
|
|
return display;
|
|
|
|
return NULL;
|
|
}
|