# Acoustic echo cancellation for VoLTE speakerphone calls (journal/ims.md s43).
# Creates a virtual pair: ec_sink (play here; forwarded to the speakers and
# used as the AEC reference) and ec_source (mic with the speaker signal
# subtracted, WebRTC AEC). capture/playback are pinned to the hardware nodes
# so making ec_* the defaults cannot loop the module into itself.
context.modules = [
    {   name = libpipewire-module-echo-cancel
        args = {
            library.name = aec/libspa-aec-webrtc
            source.props = {
                node.name = "ec_source"
                node.description = "Echo-cancelled microphone"
            }
            sink.props = {
                node.name = "ec_sink"
                node.description = "Echo-cancelled speakers"
            }
            capture.props = {
                node.name = "ec_capture"
                target.object = "alsa_input.platform-sound.capture.1.0"
                node.passive = true
            }
            playback.props = {
                node.name = "ec_playback"
                target.object = "alsa_output.platform-sound.playback.0.0"
                node.passive = true
            }
        }
    }
]