mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-26 18:20:44 +00:00
89 lines
3 KiB
C
89 lines
3 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., 59 Temple Place - Suite 330,
|
||
|
|
* Boston, MA 02111-1307, USA.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef HAVE_CONFIG_H
|
||
|
|
#include "config.h"
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#include "gstsurfacebuffer.h"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* SECTION:gstsurfacebuffer
|
||
|
|
* @short_description: Accelerated surface base class
|
||
|
|
*
|
||
|
|
* This base class 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 GstVideoContext interface is unstable API and may change in future.
|
||
|
|
* One can define GST_USE_UNSTABLE_API to acknowledge and avoid this warning.
|
||
|
|
* </note>
|
||
|
|
*/
|
||
|
|
|
||
|
|
G_DEFINE_TYPE (GstSurfaceBuffer, gst_surface_buffer, GST_TYPE_BUFFER);
|
||
|
|
|
||
|
|
static GstSurfaceConverter *
|
||
|
|
gst_surface_buffer_default_create_converter (GstSurfaceBuffer * surface,
|
||
|
|
const gchar * type, GValue * dest)
|
||
|
|
{
|
||
|
|
return NULL;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gst_surface_buffer_class_init (GstSurfaceBufferClass * klass)
|
||
|
|
{
|
||
|
|
klass->create_converter = gst_surface_buffer_default_create_converter;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
gst_surface_buffer_init (GstSurfaceBuffer * surface)
|
||
|
|
{
|
||
|
|
/* Nothing to do */
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* gst_surface_buffer_create_converter:
|
||
|
|
* @buffer: a #GstSurfaceBuffer
|
||
|
|
* @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_buffer_create_converter (GstSurfaceBuffer * buffer,
|
||
|
|
const gchar * type, GValue * dest)
|
||
|
|
{
|
||
|
|
g_return_val_if_fail (GST_IS_SURFACE_BUFFER (buffer), FALSE);
|
||
|
|
return GST_SURFACE_BUFFER_GET_CLASS (buffer)->create_converter (buffer,
|
||
|
|
type, dest);
|
||
|
|
}
|