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This allows metas to be serialized to be transmitted or stored. This is intended to be used for example by gdppay or unixfdsink. Implemented on GstCustomMeta, GstVideoMeta, GstReferenceTimestampMeta, and GstAudioMeta. Sponsored-by: Netflix Inc. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5355>
421 lines
16 KiB
C
421 lines
16 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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#include <gst/video/gstvideotimecode.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_CAPS_FEATURE_META_GST_VIDEO_META "meta: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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* @alignment: the paddings and alignment constraints of the video buffer.
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* It is up to the caller of `gst_buffer_add_video_meta_full()` to set it
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* using gst_video_meta_set_alignment(), if they did not it defaults
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* to no padding and no alignment. Since: 1.18
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*
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* Extra buffer metadata describing image properties
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*
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* This meta can also be used by downstream elements to specifiy their
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* buffer layout requirements for upstream. Upstream should try to
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* fit those requirements, if possible, in order to prevent buffer copies.
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*
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* This is done by passing a custom #GstStructure to
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* gst_query_add_allocation_meta() when handling the ALLOCATION query.
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* This structure should be named 'video-meta' and can have the following
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* fields:
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* - padding-top (uint): extra pixels on the top
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* - padding-bottom (uint): extra pixels on the bottom
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* - padding-left (uint): extra pixels on the left side
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* - padding-right (uint): extra pixels on the right side
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* The padding fields have the same semantic as #GstVideoMeta.alignment
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* and so represent the paddings requested on produced video buffers.
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*
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* Since 1.24 it can be serialized using gst_meta_serialize() and
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* gst_meta_deserialize().
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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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GstVideoAlignment alignment;
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};
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GST_VIDEO_API
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GType gst_video_meta_api_get_type (void);
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GST_VIDEO_API
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const GstMetaInfo * gst_video_meta_get_info (void);
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GST_VIDEO_API
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GstVideoMeta * gst_buffer_get_video_meta (GstBuffer *buffer);
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GST_VIDEO_API
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GstVideoMeta * gst_buffer_get_video_meta_id (GstBuffer *buffer, gint id);
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GST_VIDEO_API
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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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GST_VIDEO_API
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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, const gsize offset[GST_VIDEO_MAX_PLANES],
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const gint stride[GST_VIDEO_MAX_PLANES]);
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GST_VIDEO_API
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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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GST_VIDEO_API
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gboolean gst_video_meta_unmap (GstVideoMeta *meta, guint plane, GstMapInfo *info);
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GST_VIDEO_API
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gboolean gst_video_meta_set_alignment (GstVideoMeta * meta, GstVideoAlignment alignment);
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GST_VIDEO_API
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gboolean gst_video_meta_get_plane_size (GstVideoMeta * meta, gsize plane_size[GST_VIDEO_MAX_PLANES]);
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GST_VIDEO_API
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gboolean gst_video_meta_get_plane_height (GstVideoMeta * meta, guint plane_height[GST_VIDEO_MAX_PLANES]);
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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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GST_VIDEO_API
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GType gst_video_crop_meta_api_get_type (void);
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GST_VIDEO_API
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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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GST_VIDEO_API
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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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* @in_info: the input #GstVideoInfo
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* @out_info: the output #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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/**
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* GstVideoGLTextureType:
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* @GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE: Luminance texture, GL_LUMINANCE
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* @GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA: Luminance-alpha texture, GL_LUMINANCE_ALPHA
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* @GST_VIDEO_GL_TEXTURE_TYPE_RGB16: RGB 565 texture, GL_RGB
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* @GST_VIDEO_GL_TEXTURE_TYPE_RGB: RGB texture, GL_RGB
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* @GST_VIDEO_GL_TEXTURE_TYPE_RGBA: RGBA texture, GL_RGBA
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* @GST_VIDEO_GL_TEXTURE_TYPE_R: R texture, GL_RED_EXT
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* @GST_VIDEO_GL_TEXTURE_TYPE_RG: RG texture, GL_RG_EXT
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*
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* The GL texture type.
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*/
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typedef enum
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{
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GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE,
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GST_VIDEO_GL_TEXTURE_TYPE_LUMINANCE_ALPHA,
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GST_VIDEO_GL_TEXTURE_TYPE_RGB16,
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GST_VIDEO_GL_TEXTURE_TYPE_RGB,
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GST_VIDEO_GL_TEXTURE_TYPE_RGBA,
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GST_VIDEO_GL_TEXTURE_TYPE_R,
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GST_VIDEO_GL_TEXTURE_TYPE_RG
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} GstVideoGLTextureType;
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/**
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* GstVideoGLTextureOrientation:
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* @GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_NORMAL: Top line first in memory, left row first
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* @GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_FLIP: Bottom line first in memory, left row first
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* @GST_VIDEO_GL_TEXTURE_ORIENTATION_X_FLIP_Y_NORMAL: Top line first in memory, right row first
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* @GST_VIDEO_GL_TEXTURE_ORIENTATION_X_FLIP_Y_FLIP: Bottom line first in memory, right row first
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*
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* The orientation of the GL texture.
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*/
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typedef enum
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{
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GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_NORMAL,
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GST_VIDEO_GL_TEXTURE_ORIENTATION_X_NORMAL_Y_FLIP,
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GST_VIDEO_GL_TEXTURE_ORIENTATION_X_FLIP_Y_NORMAL,
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GST_VIDEO_GL_TEXTURE_ORIENTATION_X_FLIP_Y_FLIP
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} GstVideoGLTextureOrientation;
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#define GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE (gst_video_gl_texture_upload_meta_api_get_type())
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#define GST_VIDEO_GL_TEXTURE_UPLOAD_META_INFO (gst_video_gl_texture_upload_meta_get_info())
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typedef struct _GstVideoGLTextureUploadMeta GstVideoGLTextureUploadMeta;
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typedef gboolean (*GstVideoGLTextureUpload) (GstVideoGLTextureUploadMeta *meta, guint texture_id[4]);
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#define GST_CAPS_FEATURE_META_GST_VIDEO_GL_TEXTURE_UPLOAD_META "meta:GstVideoGLTextureUploadMeta"
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/**
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* GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META:
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*
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* An option that can be activated on a bufferpool to request gl texture upload
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* meta on buffers from the pool.
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*
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* When this option is enabled on the bufferpool,
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* @GST_BUFFER_POOL_OPTION_VIDEO_META should also be enabled.
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*
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* Since: 1.2.2
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*/
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#define GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META "GstBufferPoolOptionVideoGLTextureUploadMeta"
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/**
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* GstVideoGLTextureUploadMeta:
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* @meta: parent #GstMeta
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* @texture_orientation: Orientation of the textures
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* @n_textures: Number of textures that are generated
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* @texture_type: Type of each texture
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*
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* Extra buffer metadata for uploading a buffer to an OpenGL texture
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* ID. The caller of gst_video_gl_texture_upload_meta_upload() must
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* have OpenGL set up and call this from a thread where it is valid
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* to upload something to an OpenGL texture.
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*/
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struct _GstVideoGLTextureUploadMeta {
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GstMeta meta;
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GstVideoGLTextureOrientation texture_orientation;
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guint n_textures;
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GstVideoGLTextureType texture_type[4];
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/* <private> */
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GstBuffer *buffer;
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GstVideoGLTextureUpload upload;
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gpointer user_data;
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GBoxedCopyFunc user_data_copy;
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GBoxedFreeFunc user_data_free;
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};
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GST_VIDEO_API
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GType gst_video_gl_texture_upload_meta_api_get_type (void);
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GST_VIDEO_API
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const GstMetaInfo * gst_video_gl_texture_upload_meta_get_info (void);
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#define gst_buffer_get_video_gl_texture_upload_meta(b) ((GstVideoGLTextureUploadMeta*)gst_buffer_get_meta((b),GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE))
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GST_VIDEO_API
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GstVideoGLTextureUploadMeta *
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gst_buffer_add_video_gl_texture_upload_meta (GstBuffer *buffer,
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GstVideoGLTextureOrientation texture_orientation,
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guint n_textures,
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GstVideoGLTextureType texture_type[4],
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GstVideoGLTextureUpload upload,
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gpointer user_data,
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GBoxedCopyFunc user_data_copy,
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GBoxedFreeFunc user_data_free);
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GST_VIDEO_API
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gboolean gst_video_gl_texture_upload_meta_upload (GstVideoGLTextureUploadMeta *meta,
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guint texture_id[4]);
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/**
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* GstVideoRegionOfInterestMeta:
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* @meta: parent #GstMeta
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* @roi_type: GQuark describing the semantic of the Roi (f.i. a face, a pedestrian)
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* @id: identifier of this particular ROI
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* @parent_id: identifier of its parent ROI, used f.i. for ROI hierarchisation.
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* @x: x component of upper-left corner
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* @y: y component of upper-left corner
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* @w: bounding box width
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* @h: bounding box height
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* @params: list of #GstStructure containing element-specific params for downstream,
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* see gst_video_region_of_interest_meta_add_param(). (Since: 1.14)
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*
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* Extra buffer metadata describing an image region of interest
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*/
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typedef struct {
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GstMeta meta;
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GQuark roi_type;
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gint id;
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gint parent_id;
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guint x;
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guint y;
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guint w;
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guint h;
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GList *params;
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} GstVideoRegionOfInterestMeta;
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GST_VIDEO_API
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GType gst_video_region_of_interest_meta_api_get_type (void);
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#define GST_VIDEO_REGION_OF_INTEREST_META_API_TYPE (gst_video_region_of_interest_meta_api_get_type())
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GST_VIDEO_API
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const GstMetaInfo *gst_video_region_of_interest_meta_get_info (void);
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#define GST_VIDEO_REGION_OF_INTEREST_META_INFO (gst_video_region_of_interest_meta_get_info())
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#define gst_buffer_get_video_region_of_interest_meta(b) \
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((GstVideoRegionOfInterestMeta*)gst_buffer_get_meta((b),GST_VIDEO_REGION_OF_INTEREST_META_API_TYPE))
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GST_VIDEO_API
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GstVideoRegionOfInterestMeta *gst_buffer_get_video_region_of_interest_meta_id (GstBuffer * buffer,
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gint id);
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GST_VIDEO_API
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GstVideoRegionOfInterestMeta *gst_buffer_add_video_region_of_interest_meta (GstBuffer * buffer,
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const gchar * roi_type,
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guint x,
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guint y,
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guint w,
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guint h);
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GST_VIDEO_API
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GstVideoRegionOfInterestMeta *gst_buffer_add_video_region_of_interest_meta_id (GstBuffer * buffer,
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GQuark roi_type,
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guint x,
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guint y,
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guint w,
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guint h);
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GST_VIDEO_API
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void gst_video_region_of_interest_meta_add_param (GstVideoRegionOfInterestMeta * meta,
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GstStructure * s);
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GST_VIDEO_API
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GstStructure *gst_video_region_of_interest_meta_get_param (GstVideoRegionOfInterestMeta * meta,
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const gchar * name);
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/**
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* GstVideoTimeCodeMeta:
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* @meta: parent #GstMeta
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* @tc: the GstVideoTimeCode to attach
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*
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* Extra buffer metadata describing the GstVideoTimeCode of the frame.
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*
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* Each frame is assumed to have its own timecode, i.e. they are not
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* automatically incremented/interpolated.
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*
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* Since: 1.10
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*/
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typedef struct {
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GstMeta meta;
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GstVideoTimeCode tc;
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} GstVideoTimeCodeMeta;
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GST_VIDEO_API
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GType gst_video_time_code_meta_api_get_type (void);
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#define GST_VIDEO_TIME_CODE_META_API_TYPE (gst_video_time_code_meta_api_get_type())
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GST_VIDEO_API
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const GstMetaInfo *gst_video_time_code_meta_get_info (void);
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#define GST_VIDEO_TIME_CODE_META_INFO (gst_video_time_code_meta_get_info())
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#define gst_buffer_get_video_time_code_meta(b) \
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((GstVideoTimeCodeMeta*)gst_buffer_get_meta((b),GST_VIDEO_TIME_CODE_META_API_TYPE))
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GST_VIDEO_API
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GstVideoTimeCodeMeta *gst_buffer_add_video_time_code_meta (GstBuffer * buffer,
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const GstVideoTimeCode* tc);
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GST_VIDEO_API
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GstVideoTimeCodeMeta *
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gst_buffer_add_video_time_code_meta_full (GstBuffer * buffer,
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guint fps_n,
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guint fps_d,
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GDateTime * latest_daily_jam,
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GstVideoTimeCodeFlags flags,
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guint hours,
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guint minutes,
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guint seconds,
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guint frames,
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guint field_count);
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G_END_DECLS
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#endif /* __GST_VIDEO_META_H__ */
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