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meta: add metadata features

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Add a new features property to the metadata param. This should be
of type CHOICE_FEATURES_Int and should contain the extra features
supported by this metadata.

Make a special features metadata type that is a combination of the
metadata type in the upper 16 bits and the features for that type in the
lower 16 bits. Make a function to search if a type has certain feature
bits.

On the server, when negotiating buffers and metadata, check the result
of the features after filtering and if they are not 0, place them as
0 sized extra feature metadata on the buffer.

Add some metadata features for the sync_timeline, one that specifies
that the RELEASE flag is supported. With this in place, a producer can
see if a consumer supports the UNSCHEDULED_RELEASE flag.

See #4885
This commit is contained in:
Wim Taymans 2025-09-19 14:05:04 +02:00
parent a859c7a651
commit 00d983a40d
4 changed files with 31 additions and 4 deletions
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spa/include/spa/param/buffers.h
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@ -33,6 +33,7 @@ enum spa_param_meta {
SPA_PARAM_META_START,
SPA_PARAM_META_type, /**< the metadata, one of enum spa_meta_type (Id enum spa_meta_type) */
SPA_PARAM_META_size, /**< the expected maximum size the meta (Int) */
SPA_PARAM_META_features, /**< meta data features (Features Int) */
};
/** properties for SPA_TYPE_OBJECT_ParamIO */