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gboolean | gst_video_meta_map () |
gboolean | gst_video_meta_unmap () |
const GstMetaInfo * | gst_video_meta_get_info () |
GstVideoMeta * | gst_buffer_add_video_meta () |
GstVideoMeta * | gst_buffer_add_video_meta_full () |
#define | gst_buffer_get_video_meta() |
GstVideoMeta * | gst_buffer_get_video_meta_id () |
#define | gst_buffer_add_video_crop_meta() |
#define | gst_buffer_get_video_crop_meta() |
GstVideoRegionOfInterestMeta * | gst_buffer_add_video_region_of_interest_meta () |
GstVideoRegionOfInterestMeta * | gst_buffer_add_video_region_of_interest_meta_id () |
#define | gst_buffer_get_video_region_of_interest_meta() |
GstVideoRegionOfInterestMeta * | gst_buffer_get_video_region_of_interest_meta_id () |
gboolean | (*GstVideoGLTextureUpload) () |
GstVideoGLTextureUploadMeta * | gst_buffer_add_video_gl_texture_upload_meta () |
#define | gst_buffer_get_video_gl_texture_upload_meta() |
gboolean | gst_video_gl_texture_upload_meta_upload () |
gboolean gst_video_meta_map (GstVideoMeta *meta
,guint plane
,GstMapInfo *info
,gpointer *data
,gint *stride
,GstMapFlags flags
);
Map the video plane with index plane
in meta
and return a pointer to the
first byte of the plane and the stride of the plane.
gboolean gst_video_meta_unmap (GstVideoMeta *meta
,guint plane
,GstMapInfo *info
);
Unmap a previously mapped plane with gst_video_meta_map()
.
GstVideoMeta * gst_buffer_add_video_meta (GstBuffer *buffer
,GstVideoFrameFlags flags
,GstVideoFormat format
,guint width
,guint height
);
Attaches GstVideoMeta metadata to buffer
with the given parameters and the
default offsets and strides for format
and width
x height
.
This function calculates the default offsets and strides and then calls
gst_buffer_add_video_meta_full()
with them.
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]
);
Attaches GstVideoMeta metadata to buffer
with the given parameters.
#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
);
Find the GstVideoMeta on buffer
with the given id
.
Buffers can contain multiple GstVideoMeta metadata items when dealing with multiview buffers.
#define gst_buffer_add_video_crop_meta(b) ((GstVideoCropMeta*)gst_buffer_add_meta((b),GST_VIDEO_CROP_META_INFO, NULL))
#define gst_buffer_get_video_crop_meta(b) ((GstVideoCropMeta*)gst_buffer_get_meta((b),GST_VIDEO_CROP_META_API_TYPE))
GstVideoRegionOfInterestMeta * gst_buffer_add_video_region_of_interest_meta (GstBuffer *buffer
,const gchar *roi_type
,guint x
,guint y
,guint w
,guint h
);
Attaches GstVideoRegionOfInterestMeta metadata to buffer
with the given
parameters.
GstVideoRegionOfInterestMeta * gst_buffer_add_video_region_of_interest_meta_id (GstBuffer *buffer
,GQuark roi_type
,guint x
,guint y
,guint w
,guint h
);
Attaches GstVideoRegionOfInterestMeta metadata to buffer
with the given
parameters.
#define gst_buffer_get_video_region_of_interest_meta(b)
GstVideoRegionOfInterestMeta * gst_buffer_get_video_region_of_interest_meta_id (GstBuffer *buffer
,gint id
);
Find the GstVideoRegionOfInterestMeta on buffer
with the given id
.
Buffers can contain multiple GstVideoRegionOfInterestMeta metadata items if multiple regions of interests are marked on a frame.
the GstVideoeRegionOfInterestMeta with id
or NULL
when there is
no such metadata on buffer
.
gboolean (*GstVideoGLTextureUpload) (GstVideoGLTextureUploadMeta *meta
,guint texture_id[4]
);
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
);
Attaches GstVideoGLTextureUploadMeta metadata to buffer
with the given
parameters.
#define gst_buffer_get_video_gl_texture_upload_meta(b) ((GstVideoGLTextureUploadMeta*)gst_buffer_get_meta((b),GST_VIDEO_GL_TEXTURE_UPLOAD_META_API_TYPE))
gboolean gst_video_gl_texture_upload_meta_upload (GstVideoGLTextureUploadMeta *meta
,guint texture_id[4]
);
Uploads the buffer which owns the meta to a specific texture ID.
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); };
Extra buffer metadata describing image properties
parent GstMeta |
||
the buffer this metadata belongs to |
||
GstVideoFrameFlags |
additional video flags |
|
GstVideoFormat |
the video format |
|
identifier of the frame |
||
the video width |
||
the video height |
||
the number of planes in the image |
||
array of offsets for the planes. This field might not always be
valid, it is used by the default implementation of |
||
array of strides for the planes. This field might not always be
valid, it is used by the default implementation of |
||
map the memory of a plane |
||
unmap the memory of a plane |
typedef struct { GstVideoInfo *in_info; GstVideoInfo *out_info; } GstVideoMetaTransform;
Extra data passed to a video transform GstMetaTransformFunction such as: "gst-video-scale".
GstVideoInfo * |
the input GstVideoInfo |
|
GstVideoInfo * |
the output GstVideoInfo |
struct GstVideoCropMeta { GstMeta meta; guint x; guint y; guint width; guint height; };
Extra buffer metadata describing image cropping.
typedef struct { GstMeta meta; GQuark roi_type; gint id; gint parent_id; guint x; guint y; guint w; guint h; } GstVideoRegionOfInterestMeta;
Extra buffer metadata describing an image region of interest
#define GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META "GstBufferPoolOptionVideoGLTextureUploadMeta"
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
struct GstVideoGLTextureUploadMeta { GstMeta meta; GstVideoGLTextureOrientation texture_orientation; guint n_textures; GstVideoGLTextureType texture_type[4]; };
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.