#!/bin/bash
# Script to bridge/start pulseaudio into loopback mode

INSTALL_PREFIX="X-PREFIX-X"

# ----------------------------------------------

if [ ! -d ~/.pulse ]; then
    mkdir -p ~/.pulse
fi

if [ ! -f ~/.pulse/client.conf ]; then
    echo "autospawn = no" > ~/.pulse/client.conf
else
    if (! cat ~/.pulse/client.conf | grep "autospawn = no" > /dev/null); then
        sed -i '/autospawn =/d' ~/.pulse/client.conf
        echo "autospawn = no" >> ~/.pulse/client.conf
    fi
fi

if [ ! -f ~/.pulse/daemon.conf ]; then
    echo "default-sample-format = float32le" > ~/.pulse/daemon.conf
    echo "realtime-scheduling = yes" >> ~/.pulse/daemon.conf
    echo "rlimit-rttime = -1" >> ~/.pulse/daemon.conf
    echo "exit-idle-time = -1" >> ~/.pulse/daemon.conf
else
    if (! cat ~/.pulse/daemon.conf | grep "default-sample-format = float32le" > /dev/null); then
        sed -i '/default-sample-format = /d' ~/.pulse/daemon.conf
        echo "default-sample-format = float32le" >> ~/.pulse/daemon.conf
    fi
    if (! cat ~/.pulse/daemon.conf | grep "realtime-scheduling = yes" > /dev/null); then
        sed -i '/realtime-scheduling = /d' ~/.pulse/daemon.conf
        echo "realtime-scheduling = yes" >> ~/.pulse/daemon.conf
    fi
    if (! cat ~/.pulse/daemon.conf | grep "rlimit-rttime = -1" > /dev/null); then
        sed -i '/rlimit-rttime =/d' ~/.pulse/daemon.conf
        echo "rlimit-rttime = -1" >> ~/.pulse/daemon.conf
    fi
    if (! cat ~/.pulse/daemon.conf | grep "exit-idle-time = -1" > /dev/null); then
        sed -i '/exit-idle-time =/d' ~/.pulse/daemon.conf
        echo "exit-idle-time = -1" >> ~/.pulse/daemon.conf
    fi
fi

# ----------------------------------------------

case $1 in
    -h|--h|--help)
echo "usage: $0 [command]

  -p, --play    Playback mode only

  -h, --help    Show this help menu
      --dummy   Don't do anything, just create the needed files

NOTE:
 When runned with no arguments, pulse2jack will
 activate PulseAudio with both playback and record modes.
"
exit
    ;;

    --dummy)
exit
    ;;

    -p|--p|--play)
FILE=$INSTALL_PREFIX/share/cadence/pulse2loopback/play.pa
    ;;

    *)
FILE=$INSTALL_PREFIX/share/cadence/pulse2loopback/play+rec.pa
    ;;
esac

# ----------------------------------------------

IsPulseAudioRunning()
{
    PROCESS=`ps -u $USER | grep pulseaudio`
    if [ "$PROCESS" == "" ]; then
        false
    else
        true
    fi
}

if (IsPulseAudioRunning); then
{
    echo "PulseAudio is already running, make sure it outputs to Loopback"

    pactl load-module module-alsa-source source_name=input_loopback device=hw:Loopback > /dev/null
    pactl load-module module-alsa-sink sink_name=output_loopback device=hw:Loopback > /dev/null
    pacmd set-default-source input_loopback > /dev/null
    pacmd set-default-sink output_loopback > /dev/null

    echo "Done"
}
else
{
    if (`pulseaudio --daemonize --high-priority --realtime --exit-idle-time=-1 --file=$FILE -n`); then
        echo "Initiated PulseAudio successfully!"
    else
        echo "Failed to initialize PulseAudio!"
    fi
}
fi