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design: Rename GstMetaVideo to GstVideoMeta

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This is the name of the Meta that has finally been chosen for the actual
implementation

Closes #25
This commit is contained in:
Nicolas Dufresne 2018-11-20 19:42:43 -05:00
parent 6805ea81f3
commit 0d23f2c021
1 changed files with 8 additions and 8 deletions
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16
markdown/design/meta.md
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@ -83,7 +83,7 @@ fields and methods.
``` c
#define GST_VIDEO_MAX_PLANES 4
struct GstMetaVideo {
struct GstVideoMeta {
GstMeta meta;
GstBuffer *buffer;
@ -100,14 +100,14 @@ struct GstMetaVideo {
gint stride[GST_VIDEO_MAX_PLANES]; /* stride of the image lines. Can be negative when
* the image is upside-down */
gpointer (*map) (GstMetaVideo *meta, guint plane, gpointer * data, gint *stride,
gpointer (*map) (GstVideoMeta *meta, guint plane, gpointer * data, gint *stride,
GstMapFlags flags);
gboolean (*unmap) (GstMetaVideo *meta, guint plane, gpointer data);
gboolean (*unmap) (GstVideoMeta *meta, guint plane, gpointer data);
};
gpointer gst_meta_video_map (GstMetaVideo *meta, guint plane, gpointer * data,
gpointer gst_meta_video_map (GstVideoMeta *meta, guint plane, gpointer * data,
gint *stride, GstMapflags flags);
gboolean gst_meta_video_unmap (GstMetaVideo *meta, guint plane, gpointer data);
gboolean gst_meta_video_unmap (GstVideoMeta *meta, guint plane, gpointer data);
```
`GstMeta` derived structures define the API of the metadata. The API can
@ -186,7 +186,7 @@ GstMetaTiming | | | |
+- | clock_rate | |
+ . . . . . . . . . . . . . . . . + |
| next <--+
GstMetaVideo +- +- | info ------> GstMetaInfo
GstVideoMeta +- +- | info ------> GstMetaInfo
| | | | |
| | | flags | |
| | | n_planes | |
@ -195,7 +195,7 @@ GstMetaVideo +- +- | info ------> GstMetaInfo
| | | unmap | |
+- | | | |
| | private fields | |
GstMetaVideoImpl | | ... | |
GstVideoMetaImpl | | ... | |
| | ... | |
+- | | |
+ . . . . . . . . . . . . . . . . + .
@ -354,7 +354,7 @@ implement the actions needed to update the metadata of the subbuffer.
It might not make sense for some metadata to work with subbuffers. For
example when we take a subbuffer of a buffer with a video frame, the
`GstMetaVideo` simply becomes invalid and is removed from the new
`GstVideoMeta` simply becomes invalid and is removed from the new
subbuffer.
## Relationship with GstCaps