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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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e32e8f6c52
Install defaul map/unmap function on the metadata and really call the functions instead of always calling a default implementation. Rework some bits so that we don't have to mess with the GstMapInfo information (adding the offset), instead pass the adjusted data pointer from the map function.
118 lines
4.2 KiB
C
118 lines
4.2 KiB
C
/* GStreamer
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* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.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_VIDEO_META_H__
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#define __GST_VIDEO_META_H__
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#include <gst/gst.h>
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#include <gst/video/video.h>
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G_BEGIN_DECLS
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#define GST_VIDEO_META_API "GstVideoMeta"
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#define GST_VIDEO_META_INFO (gst_video_meta_get_info())
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typedef struct _GstVideoMeta GstVideoMeta;
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#define GST_VIDEO_CROP_META_API "GstVideoCropMeta"
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#define GST_VIDEO_CROP_META_INFO (gst_video_crop_meta_get_info())
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typedef struct _GstVideoCropMeta GstVideoCropMeta;
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/**
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* GstVideoMeta:
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* @meta: parent #GstMeta
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* @buffer: the buffer this metadata belongs to
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* @flags: additional video flags
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* @format: the video format
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* @id: identifier of the frame
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* @width: the video width
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* @height: the video height
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* @n_planes: the number of planes in the image
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* @offset: array of offsets for the planes. This field might not always be
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* valid, it is used by the default implementation of @map.
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* @stride: array of strides for the planes. This field might not always be
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* valid, it is used by the default implementation of @map.
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* @map: map the memory of a plane
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* @unmap: unmap the memory of a plane
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*
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* Extra buffer metadata describing image properties
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*/
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struct _GstVideoMeta {
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GstMeta meta;
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GstBuffer *buffer;
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GstVideoFlags flags;
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GstVideoFormat format;
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gint id;
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guint width;
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guint height;
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guint n_planes;
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gsize offset[GST_VIDEO_MAX_PLANES];
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gint stride[GST_VIDEO_MAX_PLANES];
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gboolean (*map) (GstVideoMeta *meta, guint plane, GstMapInfo *info,
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gpointer *data, gint * stride, GstMapFlags flags);
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gboolean (*unmap) (GstVideoMeta *meta, guint plane, GstMapInfo *info);
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};
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const GstMetaInfo * gst_video_meta_get_info (void);
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#define gst_buffer_get_video_meta(b) ((GstVideoMeta*)gst_buffer_get_meta((b),GST_VIDEO_META_INFO))
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GstVideoMeta * gst_buffer_get_video_meta_id (GstBuffer *buffer, gint id);
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GstVideoMeta * gst_buffer_add_video_meta (GstBuffer *buffer, GstVideoFlags flags,
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GstVideoFormat format, guint width, guint height);
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GstVideoMeta * gst_buffer_add_video_meta_full (GstBuffer *buffer, GstVideoFlags flags,
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GstVideoFormat format, guint width, guint height,
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guint n_planes, gsize offset[GST_VIDEO_MAX_PLANES],
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gint stride[GST_VIDEO_MAX_PLANES]);
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gboolean gst_video_meta_map (GstVideoMeta *meta, guint plane, GstMapInfo *info,
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gpointer *data, gint *stride, GstMapFlags flags);
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gboolean gst_video_meta_unmap (GstVideoMeta *meta, guint plane, GstMapInfo *info);
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/**
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* GstVideoCropMeta:
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* @meta: parent #GstMeta
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* @x: the horizontal offset
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* @y: the vertical offset
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* @width: the cropped width
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* @height: the cropped height
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*
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* Extra buffer metadata describing image cropping.
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*/
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struct _GstVideoCropMeta {
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GstMeta meta;
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guint x;
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guint y;
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guint width;
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guint height;
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};
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const GstMetaInfo * gst_video_crop_meta_get_info (void);
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#define gst_buffer_get_video_crop_meta(b) ((GstVideoCropMeta*)gst_buffer_get_meta((b),GST_VIDEO_CROP_META_INFO))
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#define gst_buffer_add_video_crop_meta(b) ((GstVideoCropMeta*)gst_buffer_add_meta((b),GST_VIDEO_CROP_META_INFO, NULL))
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G_END_DECLS
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#endif /* __GST_VIDEO_META_H__ */
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