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