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meta: add cursor metadata and examples

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Add a moving and flashing circle cursor to video-src
Render the cursor in video-play
Alsa add VideoCrop metadata
This commit is contained in:
Wim Taymans 2018-11-30 11:07:45 +01:00
parent c982f73779
commit ac5f0b851d
4 changed files with 176 additions and 10 deletions
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33
spa/include/spa/buffer/meta.h
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@ -40,6 +40,8 @@ enum spa_meta_type {
SPA_META_Header,
SPA_META_VideoCrop,
SPA_META_VideoDamage,
SPA_META_Bitmap,
SPA_META_Cursor,
};
/**
@ -89,6 +91,37 @@ struct spa_meta_region {
spa_meta_check(pos, meta); \
(pos)++)
#define spa_meta_bitmap_is_valid(m) ((m)->format != 0)
/**
* Bitmap information
*
* This metadata contains a bitmap image in the given format and size.
* It is typically used for cursor images or other small images that are
* better transfered inline.
*/
struct spa_meta_bitmap {
uint32_t format; /**< bitmap video format, one of enum spa_video_format */
struct spa_rectangle size; /**< width and height of bitmap */
int32_t stride; /**< stride of bitmap data */
uint32_t offset; /**< offset of bitmap data in this structure */
};
#define spa_meta_cursor_is_valid(m) ((m)->id != 0)
/**
* Cursor information
*
* Metadata to describe the position and appearance of a pointing device.
*/
struct spa_meta_cursor {
uint32_t id; /**< cursor id */
uint32_t flags; /**< extra flags */
struct spa_point position; /**< position on screen */
struct spa_point hotspot; /**< offsets for hotspot in bitmap */
uint32_t bitmap_offset; /**< offset of bitmap meta in this structure */
};
#ifdef __cplusplus
} /* extern "C" */
#endif