#!/bin/bash
# bash is required for the <<< and more
# for ladspa plugins descriptions, see
# http://plugin.org.uk/ladspa-swh/docs/ladspa-swh.html#tth_sEc2.6

test_running=true
while $test_running; do
    sinkdata=$(pacmd list-sinks)
    listsink_rv=$?

    if (($listsink_rv != 0)); then
        notify-send "pulse plugins" "pulseaudio isn't running"
        paplay ~/Musik/stille.flac
    else
        test_running=false
    fi
done

pat="<sammler>"
[[ $sinkdata =~ $pat ]] && {
    notify-send "pulse plugins" "already activated"
    exit
}

# Add ladspa sinks
# LADSPA_PATH didn't work for me
pactl load-module module-ladspa-sink master=0 sink_name=lowfre_butt \
    plugin=/usr/local/lib/ladspa/butterworth_1902.so label=buttlow_iir control=50,
    #~ plugin=butterworth_1902 label=buttlow_iir control=50,
pactl load-module module-ladspa-sink master=0 sink_name=lowfre_tsche \
    plugin=/usr/local/lib/ladspa/lowpass_iir_1891.so label=lowpass_iir control=40,3
    #~ plugin=lowpass_iir_1891 label=lowpass_iir control=40,3

# Add null sink, loopback the ladspa sinks and original copy into it, set the
# null sink "sammler" as default and adjust volume ratios
# code (modified) provided by georgC (via irc)
pactl load-module module-null-sink sink_name=sammler
my_loopback="pactl load-module module-loopback latency_msec=30 \
    max_latency_msec=40 adjust_time=1 fast_adjust_threshold_msec=150"
    #~ max_latency_msec=40 adjust_time=1"
$my_loopback source=sammler.monitor sink=lowfre_butt
$my_loopback source=sammler.monitor sink=lowfre_tsche
$my_loopback source=sammler.monitor sink=0
pactl set-default-sink sammler
lowfre_index=$(pacmd list-sink-inputs | ag "<lowfre_butt>" -B4 | head -n1 | \
    cut -f2 -d":")
pactl set-sink-input-volume $lowfre_index 0x10000
pactl set-sink-input-volume $((lowfre_index+1)) 0x18675
pactl set-sink-input-volume $((lowfre_index+2)) 0x7800
#~ pacmd set-sink-input-volume $((lowfre_index+1)) 0x7800

notify-send "pulse plugins" "activated"

# module-combine-sink doesn't remember the volume configurations