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1bb83435fd
Rename @view_id to @id. Add an id to the video metadata. Add a method to get the metadata from a buffer with the given id. Make a method to map a frame with a certain id. This only maps the frame with the given id on the video metadata. The generic frame id can be used when a buffer carries multiple video frames such as in multiview mode but maybe also when dealing with interlaced video that stores the fields in separate buffers.
117 lines
4 KiB
C
117 lines
4 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_META_VIDEO_H__
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#define __GST_META_VIDEO_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_META_API_VIDEO "GstMetaVideo"
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#define GST_META_INFO_VIDEO (gst_meta_video_get_info())
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typedef struct _GstMetaVideo GstMetaVideo;
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#define GST_META_API_VIDEO_CROP "GstMetaVideoCrop"
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#define GST_META_INFO_VIDEO_CROP (gst_meta_video_crop_get_info())
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typedef struct _GstMetaVideoCrop GstMetaVideoCrop;
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/**
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* GstMetaVideo:
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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
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* @stride: array of strides for the planes
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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 _GstMetaVideo {
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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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gpointer (*map) (GstMetaVideo *meta, guint plane, gint *stride,
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GstMapFlags flags);
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gboolean (*unmap) (GstMetaVideo *meta, guint plane, gpointer data);
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};
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const GstMetaInfo * gst_meta_video_get_info (void);
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#define gst_buffer_get_meta_video(b) ((GstMetaVideo*)gst_buffer_get_meta((b),GST_META_INFO_VIDEO))
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GstMetaVideo * gst_buffer_get_meta_video_id (GstBuffer *buffer, gint id);
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GstMetaVideo * gst_buffer_add_meta_video (GstBuffer *buffer, GstVideoFlags flags,
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GstVideoFormat format, guint width, guint height);
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GstMetaVideo * gst_buffer_add_meta_video_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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gpointer gst_meta_video_map (GstMetaVideo *meta, guint plane, gint *stride,
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GstMapFlags flags);
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gboolean gst_meta_video_unmap (GstMetaVideo *meta, guint plane, gpointer data);
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/**
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* GstMetaVideoCrop:
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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 _GstMetaVideoCrop {
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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_meta_video_crop_get_info (void);
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#define gst_buffer_get_meta_video_crop(b) ((GstMetaVideoCrop*)gst_buffer_get_meta((b),GST_META_INFO_VIDEO_CROP))
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#define gst_buffer_add_meta_video_crop(b) ((GstMetaVideoCrop*)gst_buffer_add_meta((b),GST_META_INFO_VIDEO_CROP, NULL))
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G_END_DECLS
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#endif /* __GST_META_VIDEO_H__ */
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