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Modules

A PipeWire module is effectively a PipeWire client in an `.so` file that shares the Context with the loading entity.

Usually modules are loaded when they are listed in the configuration files. For example the default configuration file loads several modules:

context.modules = [
...
# The native communication protocol.
{ name = libpipewire-module-protocol-native }
# The profile module. Allows application to access profiler
# and performance data. It provides an interface that is used
# by pw-top and pw-profiler.
{ name = libpipewire-module-profiler }
# Allows applications to create metadata objects. It creates
# a factory for Metadata objects.
{ name = libpipewire-module-metadata }
# Creates a factory for making devices that run in the
# context of the PipeWire server.
{ name = libpipewire-module-spa-device-factory }
...
]

The matching libraries are:

$ ls -1 /usr/lib64/pipewire-0.3/libpipewire-module*
...
/usr/lib64/pipewire-0.3/libpipewire-module-metadata.so
/usr/lib64/pipewire-0.3/libpipewire-module-profiler.so
/usr/lib64/pipewire-0.3/libpipewire-module-protocol-native.so
/usr/lib64/pipewire-0.3/libpipewire-module-spa-device-factory.so
...

A module's entry point is the `pipewire__module_init` function, see PIPEWIRE_SYMBOL_MODULE_INIT.

int pipewire__module_init(struct pw_impl_module *module, const char *args).`
pw_impl_module

See the Example Sink and Example Source modules for a general oveview of how modules look like.

List of known modules:

- Access
- Adapter
- AVB
- Client Device
- Client Node
- Combine Stream
- Echo Cancel
- Example Filter
- Example Sink
- Example Source
- Fallback Sink
- FFADO firewire audio driver
- Filter-Chain
- JACK DBus detect
- JACK Tunnel
- Link Factory
- Loopback
- Metadata
- Netjack2 driver
- Netjack2 manager
- Unix Pipe Tunnel
- Portal
- Profiler
- Protocol Native
- Protocol Pulse
- Protocol Simple
- Pulse Tunnel
- AirPlay Sink
- RAOP Discover
- ROC sink
- ROC source
- SAP Announce and create RTP streams
- RTP sink
- RTP source
- RTP session
- RT
- Session Manager
- VBAN receiver
- VBAN sender
- X11 Bell
- Zeroconf Discover