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89 lines
3 KiB
C
89 lines
3 KiB
C
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/* GStreamer
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* Copyright (C) 2011 Collabora Ltd.
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* Copyright (C) 2011 Intel
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*
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstsurfacebuffer.h"
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/**
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* SECTION:gstsurfacebuffer
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* @short_description: Accelerated surface base class
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*
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* This base class is used to abstract hardware accelerated buffers and enable
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* generic convertion to standard type such as GL textures. The media type for
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* those buffers is defined by #GST_VIDEO_CAPS_SURFACE. An implementation
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* specific type must be set using the "type" key (e.g. type="vaapi").
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* Available convertion type are speficied using seperate boolean
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* arguement (e.g. opengl=true). Having this information in the capabilities
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* allow easy negotiating of such feature with other elements (e.g. a
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* ClutterGstVideoSink can claim accpeting caps "video/x-surface,opengl=true").
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* <note>
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* The GstVideoContext interface is unstable API and may change in future.
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* One can define GST_USE_UNSTABLE_API to acknowledge and avoid this warning.
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* </note>
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*/
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G_DEFINE_TYPE (GstSurfaceBuffer, gst_surface_buffer, GST_TYPE_BUFFER);
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static GstSurfaceConverter *
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gst_surface_buffer_default_create_converter (GstSurfaceBuffer * surface,
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const gchar * type, GValue * dest)
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{
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return NULL;
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}
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static void
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gst_surface_buffer_class_init (GstSurfaceBufferClass * klass)
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{
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klass->create_converter = gst_surface_buffer_default_create_converter;
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}
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static void
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gst_surface_buffer_init (GstSurfaceBuffer * surface)
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{
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/* Nothing to do */
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}
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/**
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* gst_surface_buffer_create_converter:
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* @buffer: a #GstSurfaceBuffer
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* @type: the type to convert to
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* @dest: a #GValue containing the destination to upload
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*
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* This method is used to create a type specific converter. The converter will
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* serve as context to accelerate the data convertion. This converter object
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* shall be discarded when the pipeline state changes to NULL and renewed when
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* caps are changed.
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*
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* Returns: newly allocated #GstSurfaceConverter
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*/
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GstSurfaceConverter *
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gst_surface_buffer_create_converter (GstSurfaceBuffer * buffer,
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const gchar * type, GValue * dest)
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{
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g_return_val_if_fail (GST_IS_SURFACE_BUFFER (buffer), FALSE);
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return GST_SURFACE_BUFFER_GET_CLASS (buffer)->create_converter (buffer,
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type, dest);
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}
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