mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-20 00:31:13 +00:00
video: Abstract surface API for HW accelerated codecs
This commit is contained in:
Nicolas Dufresne
Sebastian Dröge
parent
0a170110ea
commit
2808290592
7 changed files with 358 additions and 2 deletions
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@ -39,6 +39,9 @@
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<xi:include href="xml/gstbasevideodecoder.xml" />
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<xi:include href="xml/gstbasevideoencoder.xml" />
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<xi:include href="xml/gstbasevideoutils.xml" />
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<xi:include href="xml/gstvideocontext.xml" />
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<xi:include href="xml/gstsurfacebuffer.xml" />
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<xi:include href="xml/gstsurfaceconverter.xml" />
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</chapter>
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</part>
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@ -404,3 +404,22 @@ gst_base_video_rawvideo_convert
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gst_base_video_encoded_video_convert
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gst_video_state_get_timestamp
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</SECTION>
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<SECTION>
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<FILE>gstsurfacebuffer</FILE>
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<TITLE>GstSurfaceBuffer</TITLE>
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GST_VIDEO_CAPS_SURFACE
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GstSurfaceBuffer
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GstSurfaceBufferClass
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gst_surface_buffer_get_type
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gst_surface_buffer_create_converter
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</SECTION>
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<SECTION>
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<FILE>gstsurfaceconverter</FILE>
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<TITLE>GstSurfaceConverter</TITLE>
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GstSurfaceConverter
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GstSurfaceConverterInterface
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gst_surface_converter_get_type
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gst_surface_converter_upload
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</SECTION>
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@ -7,14 +7,20 @@ libgstbasevideo_@GST_MAJORMINOR@_la_SOURCES = \
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gstbasevideocodec.c \
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gstbasevideoutils.c \
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gstbasevideodecoder.c \
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gstbasevideoencoder.c
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gstbasevideoencoder.c \
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gstsurfacebuffer.c \
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gstsurfaceconverter.c \
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videocontext.c
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libgstbasevideo_@GST_MAJORMINOR@includedir = $(includedir)/gstreamer-@GST_MAJORMINOR@/gst/video
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libgstbasevideo_@GST_MAJORMINOR@include_HEADERS = \
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gstbasevideocodec.h \
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gstbasevideoutils.h \
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gstbasevideodecoder.h \
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gstbasevideoencoder.h
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gstbasevideoencoder.h \
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gstsurfacebuffer.h \
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gstsurfaceconverter.h \
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videocontext.h
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libgstbasevideo_@GST_MAJORMINOR@_la_CFLAGS = \
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$(GST_PLUGINS_BAD_CFLAGS) \
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88
gst-libs/gst/video/gstsurfacebuffer.c
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88
gst-libs/gst/video/gstsurfacebuffer.c
Normal file
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@ -0,0 +1,88 @@
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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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94
gst-libs/gst/video/gstsurfacebuffer.h
Normal file
94
gst-libs/gst/video/gstsurfacebuffer.h
Normal file
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@ -0,0 +1,94 @@
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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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#ifndef _GST_SURFACE_BUFFER_H_
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#define _GST_SURFACE_BUFFER_H_
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#ifndef GST_USE_UNSTABLE_API
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#warning "GstSurfaceBuffer is unstable API and may change in future."
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#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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#include <gst/video/gstsurfaceconverter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_SURFACE_BUFFER (gst_surface_buffer_get_type())
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#define GST_SURFACE_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SURFACE_BUFFER,GstSurfaceBuffer))
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#define GST_SURFACE_BUFFER_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SURFACE_BUFFER,GstSurfaceBufferClass))
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#define GST_SURFACE_BUFFER_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS((obj),GST_TYPE_SURFACE_BUFFER,GstSurfaceBufferClass))
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#define GST_IS_SURFACE_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SURFACE_BUFFER))
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#define GST_IS_SURFACE_BUFFER_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SURFACE_BUFFER))
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/**
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* GST_VIDEO_CAPS_SURFACE:
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*
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* Base caps for GstSurfaceBuffer. Implementation specific type must be marked
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* using the type attribute (e.g. type=vaapi). Available convertion shall be
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* specified using boolean attributes (e.g. opengl=true).
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*/
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#define GST_VIDEO_CAPS_SURFACE "video/x-surface"
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typedef struct _GstSurfaceBuffer GstSurfaceBuffer;
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typedef struct _GstSurfaceBufferClass GstSurfaceBufferClass;
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/**
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* GstSurfaceBuffer:
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* @parent: parent object
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*/
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struct _GstSurfaceBuffer
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{
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GstBuffer parent;
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/*< private >*/
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void *padding[GST_PADDING];
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};
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/**
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* GstSurfaceBufferClass:
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* @parent_class: parent class type.
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* @create_converter: vmethod to create a converter.
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*
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* #GstVideoContextInterface interface.
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*/
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struct _GstSurfaceBufferClass
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{
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GstBufferClass parent_class;
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GstSurfaceConverter * (*create_converter) (GstSurfaceBuffer *buffer,
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const gchar *type,
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GValue *dest);
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/*< private >*/
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void *padding[GST_PADDING];
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};
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GType gst_surface_buffer_get_type (void);
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GstSurfaceConverter *gst_surface_buffer_create_converter (GstSurfaceBuffer *buffer,
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const gchar *type,
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GValue *dest);
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G_END_DECLS
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#endif
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80
gst-libs/gst/video/gstsurfaceconverter.c
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80
gst-libs/gst/video/gstsurfaceconverter.c
Normal file
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@ -0,0 +1,80 @@
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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 "gstsurfaceconverter.h"
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#include "gstsurfacebuffer.h"
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/**
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* SECTION:gstsurfaceconverter
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* @short_description: Interface for #GstSurfaceBuffer convertion
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*
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* Objects implementing this interface are used as a convertion context. This
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* allow element optimizing the upload by keeping required resources between
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* uploads. The context must be discarded when the pipeline goes to
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* #GST_STATE_NULL or renewed whenever the caps are changed.
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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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* <refsect2>
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* <title>Example uploading to GL texture</title>
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* |[
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* if (G_UNLIKELY (priv->converter == NULL))
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* priv->converter = gst_surface_buffer_create_converter (surface, "opengl", &value);
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*
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* gst_surface_converter_uplaod (priv->converter, surface);
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* ]|
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* </refsect2>
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*/
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G_DEFINE_INTERFACE (GstSurfaceConverter, gst_surface_converter, G_TYPE_INVALID);
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static void
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gst_surface_converter_default_init (GstSurfaceConverterInterface * iface)
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{
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/* default virtual functions */
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iface->upload = NULL;
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}
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/**
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* gst_surface_converter_upload:
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* @converter: a #GstSurfaceConverter
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* @buffer: the #GstSurfaceBuffer to upload
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*
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* Convert and uploads the #GstSurfaceBuffer to the converter destination.
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*
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* Returns: #TRUE on success, #FALSE otherwise
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*/
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gboolean
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gst_surface_converter_upload (GstSurfaceConverter * converter,
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GstSurfaceBuffer * buffer)
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{
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g_return_val_if_fail (GST_IS_SURFACE_CONVERTER (converter), FALSE);
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g_return_val_if_fail (GST_IS_SURFACE_BUFFER (buffer), FALSE);
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return GST_SURFACE_CONVERTER_GET_IFACE (converter)->upload (converter,
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buffer);
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}
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66
gst-libs/gst/video/gstsurfaceconverter.h
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66
gst-libs/gst/video/gstsurfaceconverter.h
Normal file
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@ -0,0 +1,66 @@
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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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#ifndef _GST_SURFACE_CONVERTER_H_
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#define _GST_SURFACE_CONVERTER_H_
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#ifndef GST_USE_UNSTABLE_API
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#warning "GstSurfaceConverter is unstable API and may change in future."
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#warning "You can define GST_USE_UNSTABLE_API to avoid this warning."
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#endif
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define GST_TYPE_SURFACE_CONVERTER (gst_surface_converter_get_type ())
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#define GST_SURFACE_CONVERTER(obj) (GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_SURFACE_CONVERTER, GstSurfaceConverter))
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#define GST_IS_SURFACE_CONVERTER(obj) (GST_IMPLEMENTS_INTERFACE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_SURFACE_CONVERTER))
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#define GST_SURFACE_CONVERTER_GET_IFACE(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), GST_TYPE_SURFACE_CONVERTER, GstSurfaceConverterInterface))
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typedef struct _GstSurfaceBuffer GstSurfaceBuffer;
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typedef struct _GstSurfaceConverter GstSurfaceConverter;
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typedef struct _GstSurfaceConverterInterface GstSurfaceConverterInterface;
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/**
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* GstSurfaceConverterInterface:
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* @parent: parent interface type.
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* @upload: vmethod to upload #GstSurfaceBuffer.
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*
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* #GstSurfaceConverterInterface interface.
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*/
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struct _GstSurfaceConverterInterface
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{
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GTypeInterface parent;
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gboolean (*upload) (GstSurfaceConverter *converter,
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GstSurfaceBuffer *buffer);
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};
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GType gst_surface_converter_get_type (void);
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gboolean gst_surface_converter_upload (GstSurfaceConverter *converter,
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GstSurfaceBuffer *buffer);
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G_END_DECLS
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#endif
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