mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-10 11:29:55 +00:00
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/* GStreamer
|
|
* Copyright (C) 2011 Collabora Ltd.
|
|
* Copyright (C) 2011 Intel
|
|
*
|
|
* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include "gstsurfacemeta.h"
|
|
|
|
/**
|
|
* SECTION:gstsurfacemeta
|
|
* @short_description: Accelerated surface metadata
|
|
*
|
|
* This meta data is used to abstract hardware accelerated buffers and enable
|
|
* generic convertion to standard type such as GL textures. The media type for
|
|
* those buffers is defined by #GST_VIDEO_CAPS_SURFACE. An implementation
|
|
* specific type must be set using the "type" key (e.g. type="vaapi").
|
|
* Available convertion type are speficied using seperate boolean
|
|
* arguement (e.g. opengl=true). Having this information in the capabilities
|
|
* allow easy negotiating of such feature with other elements (e.g. a
|
|
* ClutterGstVideoSink can claim accpeting caps "video/x-surface,opengl=true").
|
|
* <note>
|
|
* The GstSurfaceMeta interface is unstable API and may change in future.
|
|
* One can define GST_USE_UNSTABLE_API to acknowledge and avoid this warning.
|
|
* </note>
|
|
*/
|
|
|
|
GType
|
|
gst_surface_meta_api_get_type (void)
|
|
{
|
|
static volatile GType type;
|
|
static const gchar *tags[] = { "memory", NULL };
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
GType _type = gst_meta_api_type_register ("GstSurfaceMetaAPI", tags);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_surface_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter (&meta_info)) {
|
|
const GstMetaInfo *meta =
|
|
gst_meta_register (GST_SURFACE_META_API_TYPE, "GstSurfaceMeta",
|
|
sizeof (GstSurfaceMeta),
|
|
(GstMetaInitFunction) NULL,
|
|
(GstMetaFreeFunction) NULL, (GstMetaTransformFunction) NULL);
|
|
g_once_init_leave (&meta_info, meta);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_surface_meta_create_converter:
|
|
* @meta: a #GstSurfaceMeta
|
|
* @type: the type to convert to
|
|
* @dest: a #GValue containing the destination to upload
|
|
*
|
|
* This method is used to create a type specific converter. The converter will
|
|
* serve as context to accelerate the data convertion. This converter object
|
|
* shall be discarded when the pipeline state changes to NULL and renewed when
|
|
* caps are changed.
|
|
*
|
|
* Returns: newly allocated #GstSurfaceConverter
|
|
*/
|
|
GstSurfaceConverter *
|
|
gst_surface_meta_create_converter (GstSurfaceMeta * meta,
|
|
const gchar * type, GValue * dest)
|
|
{
|
|
g_return_val_if_fail (meta != NULL, FALSE);
|
|
|
|
return meta->create_converter (meta, type, dest);
|
|
}
|