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144 lines
5 KiB
C
144 lines
5 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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_TYPE (gst_video_meta_api_get_type())
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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_TYPE (gst_video_crop_meta_api_get_type())
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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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GstVideoFrameFlags 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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GType gst_video_meta_api_get_type (void);
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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_API_TYPE))
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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, GstVideoFrameFlags flags,
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GstVideoFormat format, guint width, guint height);
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GstVideoMeta * gst_buffer_add_video_meta_full (GstBuffer *buffer, GstVideoFrameFlags 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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GType gst_video_crop_meta_api_get_type (void);
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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_API_TYPE))
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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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/* video metadata transforms */
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GQuark gst_video_meta_transform_scale_get_quark (void);
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/**
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* gst_video_meta_transform_scale:
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*
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* GQuark for the video "gst-video-scale" transform.
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*/
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#define GST_VIDEO_META_TRANSFORM_IS_SCALE(type) ((type) == gst_video_meta_transform_scale_get_quark())
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/**
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* GstVideoMetaTransform:
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* @old_info: the old #GstVideoInfo
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* @new_info: the new #GstVideoInfo
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*
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* Extra data passed to a video transform #GstMetaTransformFunction such as:
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* "gst-video-scale".
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*/
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typedef struct {
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GstVideoInfo *in_info;
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GstVideoInfo *out_info;
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} GstVideoMetaTransform;
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G_END_DECLS
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#endif /* __GST_VIDEO_META_H__ */
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