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libpipewire-module-metadata - Metadata
Contents
Config Objects
To create an object from the factory, one can use the pw_core_create_object() method or make an object in
the context.objects section like in the main PipeWire daemon config file:
context.objects = [
{ factory = metadata
args = {
metadata.name = default
metadata.values = [
{ key = default.audio.sink value = { name = somesink } }
{ key = default.audio.source value = { name = somesource } }
]
}
}
This creates a new default metadata store with 2 key/values.
Description
Allows clients to export a metadata store to the PipeWire server.
Both the client and the server need to load this module for the metadata to be exported.
This module creates a new factory and a new export type for the PW_TYPE_INTERFACE_Metadata interface.
A client will first create an implementation of the PW_TYPE_INTERFACE_Metadata interface with
pw_context_create_metadata(), for example. With the pw_core_export(), this module will create a server
side resource to expose the metadata implementation to other clients. Modifications done by the client on
the local metadata interface will be visible to all PipeWire clients.
It is also possible to use the factory to create metadata in the current processes using a config file
fragment.
As an argument to the create_object call, a set of properties will control the name of the metadata and
some initial values.
Example Configuration
The module is usually added to the config file of the main PipeWire daemon and the clients.
context.modules = [
{ name = libpipewire-module-metadata }
]
Module Name
libpipewire-module-metadata
Module Options
This module has no options.
Name
libpipewire-module-metadata - Metadata
Properties For The Create_Object Call
• metadata.name: The name of the new metadata object. If not given, the metadata object name will be
default.
• metadata.values: A JSON array of objects with initial values for the metadata object.
the metadata.values key has the following layout:
metadata.values = [
{ id = <int> key = <key> type = <type> value = <object> }
....
]
• id: an optional object id for the metadata, default 0
• key: a string, the metadata key
• type: an optional metadata value type
• value: a JSON item, the metadata value.
See Also
• pw-metadata: a tool to manage metadata
PipeWire 1.4.5 libpipewire-module-metadata(7)
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