#compdef ecasound

local curcontext="$curcontext" state line expl
typeset -A opt_args

_arguments \
  '-c[start in interactive mode]' \
  '(-q)-d\:-[debug level]:debug level' \
  '-D[print all debug information to stderr]' \
  '(-d)-q[quiet mode, no output]' \
  '(-)--help[show usage information]' \
  '(-)--version[show version information]' \
  '-n\:-[set the name of chainsetup]:chainsetup name' \
  '-s\:-[create a new chainsetup from file]:chainsetup file:_files' \
  '-sr\:-[set internal sampling rate]:internal sampling rate:(8000 11025 22050 44100 48000)' \
  '*-a\:-[select active signal chains]:chain name' \
  '-b\:-[set the size of buffer in samples]:buffer size:->b' \
  '-m\:-[force use of specified mix mode]:mix mode:((auto\:Automatic simple\:Only\ one\ input/cain/output normal\:Normal\ single-threaded\ mode))' \
  '-r[use realtime scheduling policy (SCHED_FIFO)]' \
  '-r\:-[use realtime scheduling policy (SCHED_FIFO)]:sched_priority' \
  '-x[truncate outputs]' \
  '*-z\:-[enable feature]:feature:->z' \
  '-t\:-[set processing time in seconds]:seconds (int/float)' \
  '-tl[enable looping]' \
  '*-f\:-[set sampling parameters for the following input/output files]: :->f' \
  '*-y\:-[set starting position for last specified input/output]:seconds' \
  '*-i\:-[specifies a new input source]:input source:->io' \
  '*-o\:-[specifies a new output source]:output source:->io' \
  '*-Md\:-[set the active MIDI-device]:device name:_files' \
  '*-Mms\:-[send MMC start/stop to MIDI device-id]:device id' \
  '*-mss[sends MIDI-sync to the selected MIDI-device]' \
  '*-pf\:-[use the first preset found from file as chain operator]:preset file:_files -g \*.epp\(-.\)' \
  '*-pn\:-[find preset from global preset database]:preset name:->pn' \
  '*-ev[analyze sample data to find max apm value without clipping]' \
  '*-ezf[find the optimal value for DC-adjusting]' \
  '*-eS\:-[audio stamp]:stamp-id (int)' \
  '*-ea\:-[amplify signal]:amplification value (percent)' \
  '*-eac\:-[amplify signal of channel]: :->eac' \
  '*-eaw\:-[amplify singal (clipping)]: :->eaw' \
  '*-eal\:-[limits audio level]:limit (percent)' \
  '*-ec\:-[compressor (a simple one)]: :->ec' \
  '*-eca\:-[a more advanced compressor]: :->eca' \
  '*-enm\:-[noise gate. (each channel is processes separately)]: :->enm' \
  '*-ei\:-[pitch shifter (modifies audio pitch by altering its length)]:pitch-shift (percent)' \
  '*-epp\:-[normal pan effect]:panning (0=left, 50=center, 100=right)' \
  '*-ezx\:-[adjusts the signal DC (use -ezf to find optimal values)]: :->ezx' \
  '*-eem-[envelope modulation]: :->emod' \
  '*-ef-[apply filter effects]: :->filters' \
  '*-erc\:-[copy channel]: :->erc' \
  '*-erm\:-[mix all channels to one channel]:to channel' \
  '*-et-[time based effects]: :->teffects' \
  '*-el\:-[LADSPA Plugin]: :->el' \
  '*-eli\:-[LADSPA Plugin]: :->el' \
  '*-gc\:-[time crop gate]: :->gc' \
  '*-ge\:-[threshold gate]: :->ge' \
  && return 0

case $state in
  filters)
    _values -S : 'filter effect' \
      '1[resonant bandpass filter]: :->ef1' \
      '3[resonant lowpass filter]: :->ef3' \
      '4[resonant lowpass filter (3rd-order, 36dB)]: :->ef4' \
      'a[allpass filter]: :->efa' \
      'c[comb filter]: :->efc' \
      'b[bandpass filter]: :->efb' \
      'h[highpass filter]:cutoff frequency' \
      'i[inverse comb filter]: :->efi' \
      'l[lowpass filter]:cutoff frequency' \
      'r[bandreject filter]: :->efr' \
      's[resonator (resonating bandpass filter)]: :->efs'
  ;;
  teffects)
    _values -S : 'time based effect' \
      'c[chorus]: :->etc' \
      'd[delay effect]: :->etd' \
      'e[a more advanced reverb effect]: :->ete' \
      'f[fake-stereo effect]:delay time (msec)' \
      'l[flanger]: :->etl' \
      'm[multitap delay]: :->etm' \
      'p[phaser]: :->etp' \
      'r[reverb effect]: :->etr'
  ;;
  emod)
    _values -S : 'envelopme modulation' \
      'b[pulse gate]: :->eemb' \
      'p[pulse gate (hz)]: :->eemp' \
      't[tremolo effect]: :->eemt'
  ;;
esac

case $state in
  b)
    _wanted -V sizes expl 'buffer size' compadd \
        1 2 4 8 16 32 64 128 256 512 1024 2048 4096 8192 16384 32768 65536
  ;;
  f)
    if compset -P '*,*,*,'; then
      _values 'interleaving' \
        'i[interleaved stream format]' \
	'n[noninterleaved]'
    elif compset -P '*,*,'; then
      _message 'sampling rate'
    elif compset -P '*,'; then
      _message 'channels'
    else
      _values 'sampling parameters' \
        'u8[unsigned 8-bit]' \
	's16_le[signed 16-bit little endian]' \
	's16_be[signed 16-bit big endian]' \
	's24_le[signed 24-bit little endian]' \
	's24_be[signed 24-bit big endian]' \
	's32_le[signed 32-bit little endian]' \
	's32_be[signed 32-bit big endian]' \
	'f32_le[32-bit float (little endian)]' \
	'f32_be[32-bit float (big endian)]'
    fi
  ;;
  z)
    _values -s , feature \
      '(nodb)db[enable double-buffering]' \
      '(db)nodb[disable double-buffering]' \
      'dbsize[set db buffer size]:buffer size in sample frames:(0 1 2 4 8 16)' \
      '(nointbuf)intbuf[use extra internal buffering for realtime devices]' \
      '(intbuf)nointbuf[prevent extra internal buffering for realtime devices]' \
      'xruns[processing will be halted when a under/overrun occurs]' \
      'psr[enable the precise-sample-rates]'
  ;;
  io)
    if compset -P 'alsa,'; then
      if [[ -e /proc/asound ]]; then
	eval `grep "^[[:digit:]]" < /proc/asound/cards|awk 'BEGIN {print "_values '\''ALSA device'\''" }; {print "'\''" $1 "[" $6, $7, $8, $9 "]'\''"}'||echo _message Wrong`
      else
	_message 'ALSA information bot found in proc filesystem'
      fi
    else
      _alternative \
        'files:input/output file:_files -g "*.(aif|aiff|mid|wav|ewf|mp3|mp2)(-.)"' \
        'streams:stream:(stdin stdout)' \
	'devices:realtime device:((/dev/dsp alsa\:alsa\ device null\:null\ device))'
    fi
  ;;
  pn)
    _wanted presets expl preset compadd \
        ${${(M)${(f)"$(</usr/share/ecasound/effect_presets)"}:#[a-z]*}%% *}
  ;;
  etd)
    if compset -P 3 '*,'; then
      _message 'mix (wet) (percent)'
    elif compset -P 2 '*,'; then
      _message 'number of delays'
    elif compset -P '*,'; then
      _values -s , 'surround mode' \
              '0[normal]' \
              '1[surround]' \
              '2[stereo-spread]'
    else
      _message 'delay time (msec)'
    fi
  ;;
  ge)
    if compset -P 2 '*,'; then
      _values 'volume mode'
              'rms'
    elif compset -P '*,'; then
      _message 'close threshold (percent)'
    else
      _message 'open threshold (percent)'
    fi
  ;;
  *)
    # all the rest are comma separated lists for which we use a message prompt
    typeset -A msgs
    local str
    msgs=(
      eac  'amplification value (percent):channel'								     				  
      eaw  'amplification value (percent):channel:max-clipped-samples'						     				  
      ec   'compression rate (decibels):threshold (0.0-1.0)'							     				  
      eca  'peak-level:release-time (seconds):fast compression rate (0.0-1.0):compression rate'		     				  
      enm  'threshold-level:pre-hold-time (msec):attack-time (msec):post-hold-time (msec):release-time (msec)'     				  
      ezx  'left DC fix value:right CD fix value'								     				  
      eemb 'pulse frequency (beats per minute):on time (msec)'
      eemp 'pulse frequency (hz):on time (percent)'
      eemt 'tremolo speed (beats per second):depth (percent)'
      ef1  'center frequency:width (Hz)'
      ef3  'cutoff frequency:resonance:gain'
      ef4  'cutoff:resonance'
      efa  'delay (samples):feedback (percent)'
      efc  'delay (samples):radius (0-1.0)'
      efb  'center frequency:width (Hz)'
      efi  'delay (samples):radius (0-1.0)'
      efr  'center frequency:width (Hz)'
      efs  'center frequency:width (Hz)'
      erc  'from channel:to channel'
      etc  'delay time (msec):variance time (samples):feedback (percent):lfo frequency'
      ete  'room size (metres):feedback level (percent):amount of reverbed signal added to the original (wet) (percent)'
      etl  'delay time (msec):variance time (samples):feedback (percent):lfo frequency'
      etm  'delay time (msec):number of delays:mix (wet) (percent)'
      etp  'delay time (msec):variance time (samples):feedback (percent):lfo frequency'
      etr  'delay time (msec):surround mode:feedback (percent)'
      el   'unique LADSPA name/number'
      gc   'start time (seconds):length (seconds)'
    )
    str=$msgs[$state]
    while compset -P 1 '*,'; do
      str="${str#*:}"
    done
    _message "${str%%:*}"
  ;;      
esac
