NAME

       libpipewire-module-protocol-simple - Protocol Simple

DESCRIPTION

       The simple protocol provides a bidirectional audio stream on a network socket.

       It is meant to be used with the simple protocol player app, available on Android to play
       and record a stream.

       Each client that connects will create a capture and/or playback stream, depending on the
       configuration options.

       You can also use it to feed audio data to other clients such as the snapcast server.

MODULE NAME

       libpipewire-module-protocol-simple

MODULE OPTIONS

       • capture: boolean if capture is enabled. This will create a capture stream or sink for
         each connected client.

       • playback: boolean if playback is enabled. This will create a playback or source stream
         for each connected client.

       • local.ifname = <str>: interface name to use

       • local.ifaddress = <str>: interface address to use

       • server.address = []: an array of server addresses to listen on as tcp:(<ip>:)<port>.

       • capture.props: optional properties for the capture stream

       • playback.props: optional properties for the playback stream

GENERAL OPTIONS

       Options with well-known behavior.

       • remote.name

       • audio.rate

       • audio.format

       • audio.channels

       • audio.position

       • node.latency

       • node.rate

       • stream.capture.sink

       • node.name

       • target.object

       By default the server will work with stereo 16 bits samples at 44.1KHz.

EXAMPLE CONFIGURATION

       # ~/.config/pipewire/pipewire.conf.d/my-protocol-simple.conf

       context.modules = [
       {   name = libpipewire-module-protocol-simple
           args = {
               # Provide capture stream, clients can capture data from PipeWire
               capture = true
               #
               # Provide playback stream, client can send data to PipeWire for playback
               playback = true
               #
               #audio.rate = 44100
               #audio.format = S16
               #audio.channels = 2
               #audio.position = [ FL FR ]
               #
               # The addresses this server listens on for new
               # client connections
               server.address = [
                   "tcp:4711"
               ]
               capture.props = {
                   # The node name or id to use for capture.
                   #target.object = null
                   #
                   # To make the capture stream capture the monitor ports
                   #stream.capture.sink = false
                   #
                   # Make this a sink instead of a capture stream
                   #media.class = Audio/Sink
               }
               playback.props = {
                   # The node name or id to use for playback.
                   #target.object = null
                   #
                   # Make this a source instead of a playback stream
                   #media.class = Audio/Source
               }
           }
       }
       ]

EXAMPLE CONFIGURATION FOR A SNAPCAST SERVER

        context.modules = [
        {   name = libpipewire-module-protocol-simple
            args = {
                # Provide sink
                capture = true
                audio.rate = 48000
                audio.format = S16
                audio.channels = 2
                audio.position = [ FL FR ]

                # The addresses this server listens on for new
                # client connections
                server.address = [
                    "tcp:4711"
                ]
                capture.props = {
                    # Make this a sink instead of a capture stream
                    media.class = Audio/Sink
                }
            }
        }
        ]

        On the snapcast server, add the following to the `snapserver.conf` file:

       \code{.unparsed}
        [stream]
        sampleformat =  48000:16:2
        source = tcp://127.0.0.1:4711?name=PipeWireSnapcast&mode=client

       Snapcast will try to connect to the protocol-simple server and fetch the samples from it.
       Snapcast tries to reconnect when the connection is somehow broken.