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gstreamer/gst-libs/gst/video/gstvideometa.h
Matthew Waters a777fe2628 videometa: constify tc argument to add_video_time_meta() 
We don't modify the argument.
2020-03-16 15:34:02 +11:00

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