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/* GStreamer
* Copyright (C) <2011> Wim Taymans <wim.taymans@gmail.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_VIDEO_META_H__
#define __GST_VIDEO_META_H__
#include <gst/gst.h>
#include <gst/video/video.h>
G_BEGIN_DECLS
#define GST_VIDEO_META_API_TYPE (gst_video_meta_api_get_type())
#define GST_VIDEO_META_INFO (gst_video_meta_get_info())
typedef struct _GstVideoMeta GstVideoMeta;
#define GST_VIDEO_CROP_META_API_TYPE (gst_video_crop_meta_api_get_type())
#define GST_VIDEO_CROP_META_INFO (gst_video_crop_meta_get_info())
typedef struct _GstVideoCropMeta GstVideoCropMeta;
/**
* GstVideoMeta:
* @meta: parent #GstMeta
* @buffer: the buffer this metadata belongs to
* @flags: additional video flags
* @format: the video format
* @id: identifier of the frame
* @width: the video width
* @height: the video height
* @n_planes: the number of planes in the image
* @offset: array of offsets for the planes. This field might not always be
* valid, it is used by the default implementation of @map.
* @stride: array of strides for the planes. This field might not always be
* valid, it is used by the default implementation of @map.
* @map: map the memory of a plane
* @unmap: unmap the memory of a plane
*
* Extra buffer metadata describing image properties
*/
struct _GstVideoMeta {
GstMeta meta;
GstBuffer *buffer;
GstVideoFrameFlags flags;
GstVideoFormat format;
gint id;
guint width;
guint height;
guint n_planes;
gsize offset[GST_VIDEO_MAX_PLANES];
gint stride[GST_VIDEO_MAX_PLANES];
gboolean (*map) (GstVideoMeta *meta, guint plane, GstMapInfo *info,
gpointer *data, gint * stride, GstMapFlags flags);
gboolean (*unmap) (GstVideoMeta *meta, guint plane, GstMapInfo *info);
};
GType gst_video_meta_api_get_type (void);
const GstMetaInfo * gst_video_meta_get_info (void);
#define gst_buffer_get_video_meta(b) ((GstVideoMeta*)gst_buffer_get_meta((b),GST_VIDEO_META_API_TYPE))
GstVideoMeta * gst_buffer_get_video_meta_id (GstBuffer *buffer, gint id);
GstVideoMeta * gst_buffer_add_video_meta (GstBuffer *buffer, GstVideoFrameFlags flags,
GstVideoFormat format, guint width, guint height);
GstVideoMeta * gst_buffer_add_video_meta_full (GstBuffer *buffer, GstVideoFrameFlags flags,
GstVideoFormat format, guint width, guint height,
guint n_planes, gsize offset[GST_VIDEO_MAX_PLANES],
gint stride[GST_VIDEO_MAX_PLANES]);
gboolean gst_video_meta_map (GstVideoMeta *meta, guint plane, GstMapInfo *info,
gpointer *data, gint *stride, GstMapFlags flags);
gboolean gst_video_meta_unmap (GstVideoMeta *meta, guint plane, GstMapInfo *info);
/**
* GstVideoCropMeta:
* @meta: parent #GstMeta
* @x: the horizontal offset
* @y: the vertical offset
* @width: the cropped width
* @height: the cropped height
*
* Extra buffer metadata describing image cropping.
*/
struct _GstVideoCropMeta {
GstMeta meta;
guint x;
guint y;
guint width;
guint height;
};
GType gst_video_crop_meta_api_get_type (void);
const GstMetaInfo * gst_video_crop_meta_get_info (void);
#define gst_buffer_get_video_crop_meta(b) ((GstVideoCropMeta*)gst_buffer_get_meta((b),GST_VIDEO_CROP_META_API_TYPE))
#define gst_buffer_add_video_crop_meta(b) ((GstVideoCropMeta*)gst_buffer_add_meta((b),GST_VIDEO_CROP_META_INFO, NULL))
/* video metadata transforms */
GQuark gst_video_meta_transform_scale_get_quark (void);
/**
* gst_video_meta_transform_scale:
*
* GQuark for the video "gst-video-scale" transform.
*/
#define GST_VIDEO_META_TRANSFORM_IS_SCALE(type) ((type) == gst_video_meta_transform_scale_get_quark())
/**
* GstVideoMetaTransform:
* @old_info: the old #GstVideoInfo
* @new_info: the new #GstVideoInfo
*
* Extra data passed to a video transform #GstMetaTransformFunction such as:
* "gst-video-scale".
*/
typedef struct {
GstVideoInfo *in_info;
GstVideoInfo *out_info;
} GstVideoMetaTransform;
G_END_DECLS
#endif /* __GST_VIDEO_META_H__ */
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