mdw@git.distorted.org.uk Git - profile/blob - bin/media-keys

   1 #! /usr/bin/zsh -e
   2
   3 bail () { echo >&2 "$*"; exit 2; }
   4
   5 disorder=(disorder)
   6
   7 get-disorder-state () {
   8   coproc stdbuf -oL $disorder log; kid=$!
   9
  10   while read -Ap i; do
  11     case $i[2] in
  12       state)
  13         case $i[3] in
  14           enable_random) randp=t ;;
  15           disable_random) randp=nil ;;
  16           enable_play) playp=t ;;
  17           disable_play) playp=nil ;;
  18           resume) pausep=nil ;;
  19           pause) pausep=t ;;
  20         esac
  21         ;;
  22       *)
  23         break
  24         ;;
  25     esac
  26   done
  27   kill $kid
  28 }
  29
  30 alsa_mixer=Master,0
  31 op-volume-up () { amixer sset $alsa_mixer 5%+ >/dev/null; }
  32 op-volume-down () { amixer sset $alsa_mixer 5%- >/dev/null; }
  33
  34 op-now-playing () {
  35   coproc $disorder playing; kid=$!
  36   read -p k track
  37   case $k in
  38     nothing) echo "Not playing."; return ;;
  39     track) ;;
  40     *) bail "unexpected first-line token \`$k'" ;;
  41   esac
  42   unset who
  43   read -p k _
  44   case $k in id) ;; *) bail "unexpected second-line token \`$k'" ;; esac
  45   read -p k _ name _
  46   case $k in picked) who=$name; read -p k _ ;; esac
  47   case $k in played) ;; *) bail "unexpected third-line token \`$k'" ;; esac
  48   read -pA t
  49   case $t[-1] in started | ok) st="" ;; paused) st=" (paused)" ;; esac
  50   kill $kid >/dev/null 2>&1 || :
  51
  52   artist=$(disorder part $track display artist)
  53   album=$(disorder part $track display album)
  54   title=$(disorder part $track display title)
  55   case $artist in [A-Z]) artist=$album album= ;; esac
  56   echo "$artist: ‘$title’${album+, from ‘$album’}${who+
  57 (chosen by $who)}"
  58 }
  59
  60 op-scratch () { disorder scratch; }
  61 op-enable/disable () {
  62   get-disorder-state
  63   case $playp in
  64     t) disorder disable ;;
  65     nil) disorder enable ;;
  66   esac
  67 }
  68 op-play/pause () {
  69   get-disorder-state
  70   case $playp,$pausep in
  71     nil,t) disorder enable; disorder resume ;;
  72     nil,nil) disorder enable ;;
  73     t,t) disorder resume ;;
  74     t,nil) disorder pause ;;
  75   esac
  76 }
  77
  78 if [[ -e $HOME/etc/media-keys.local ]]; then
  79   . $HOME/etc/media-keys.local
  80 fi
  81
  82 case $# in 0) echo >&2 "usage: $0 OP"; exit 2 ;; esac
  83 op=$1; shift
  84 case $(whence -w op-$op) in
  85   "op-$op: function") ;;
  86   *) echo >&2 "$0: unknown operation \`$op'"; exit 2 ;;
  87 esac
  88 op-$op "$@"