Metadata interface.
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Metadata interface.
◆ PW_TYPE_INTERFACE_Metadata
◆ PW_METADATA_PERM_MASK
◆ PW_VERSION_METADATA
| #define PW_VERSION_METADATA 3 |
◆ PW_API_METADATA_IMPL
| #define PW_API_METADATA_IMPL static inline |
◆ PW_EXTENSION_MODULE_METADATA
◆ PW_METADATA_EVENT_PROPERTY
| #define PW_METADATA_EVENT_PROPERTY 0 |
◆ PW_METADATA_EVENT_NUM
| #define PW_METADATA_EVENT_NUM 1 |
◆ PW_VERSION_METADATA_EVENTS
| #define PW_VERSION_METADATA_EVENTS 0 |
◆ PW_METADATA_METHOD_ADD_LISTENER
| #define PW_METADATA_METHOD_ADD_LISTENER 0 |
◆ PW_METADATA_METHOD_SET_PROPERTY
| #define PW_METADATA_METHOD_SET_PROPERTY 1 |
◆ PW_METADATA_METHOD_CLEAR
| #define PW_METADATA_METHOD_CLEAR 2 |
◆ PW_METADATA_METHOD_NUM
| #define PW_METADATA_METHOD_NUM 3 |
◆ PW_VERSION_METADATA_METHODS
| #define PW_VERSION_METADATA_METHODS 0 |
◆ PW_KEY_METADATA_NAME
| #define PW_KEY_METADATA_NAME "metadata.name" |
◆ PW_KEY_METADATA_VALUES
| #define PW_KEY_METADATA_VALUES "metadata.values" |
◆ pw_metadata_add_listener()
◆ pw_metadata_set_property()
| PW_API_METADATA_IMPL int pw_metadata_set_property |
( |
struct pw_metadata * | object, |
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uint32_t | subject, |
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const char * | key, |
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const char * | type, |
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const char * | value ) |
Set a metadata property.
Automatically emit property events for the subject and key when they are changed.
- Parameters
-
| subject | the id of the global to associate the metadata with. |
| key | the key of the metadata, NULL clears all metadata for the subject. |
| type | the type of the metadata, this can be blank |
| value | the metadata value. NULL clears the metadata. |
This requires X and W permissions on the metadata. It also requires M permissions on the subject global.
- See also
- pw_metadata_methods.set_property
◆ pw_metadata_clear()