Add scripts `volume.sh` and `music-player.sh`

* `volume.sh`: support Linux (amixer/ALSA) and FreeBSD/DragonFly (mixer)
* `music-player.sh`: support mpd and mocp

2 files changed, 223 insertions, 0 deletions

diff --git a/_bin/music-player.sh b/_bin/music-player.sh
new file mode 100755
index 0000000..e1e6979
--- /dev/null
+++ b/_bin/music-player.sh
@@ -0,0 +1,145 @@
+#!/bin/sh
+#
+# Music player control wrapper to support different players.
+#
+# Aaron LI
+# Created: 2016-01-07
+# Updated: 2016-01-08
+#
+
+PLAYERS="mpd mocp"
+#PLAYERS="mocp mpd"
+
+
+if [ $# -ne 1 ]; then
+    echo "Usage:"
+    echo "    `basename $0` < state | info | play | pause | toggle | stop | previous | next >"
+    exit 1
+fi
+
+
+escape() {
+    echo "$1" | sed 's/&/\&amp;/g; s/</\&lt;/g; s/>/\&gt;/g;'
+}
+
+
+notify() {
+    title="$1"
+    text=`escape "$2"`
+    icon="$3"
+    notify-send -t 5000 --hint=int:transient:1 -i "${icon}" "${title}" "${text}"
+}
+
+# mpd/mpc
+player_mpd() {
+    case "$1" in
+        state)
+            status=`mpc status`
+            if echo "${status}" | grep -q '^\[playing\]'; then
+                echo "playing"
+            elif echo "${status}" | grep -q '^\[paused\]'; then
+                echo "paused"
+            else
+                echo "stopped"
+            fi
+            ;;
+        info)
+            state=`player_mpd state`
+            #echo "state: ${state}"
+            if [ "${state}" = "stopped" ]; then
+                notify "MPD" "stopped"
+            else
+                artist=`mpc current -f "%artist%"`
+                album=`mpc current -f "[%date% - ]%album%"`
+                title=`mpc current -f "%title%"`
+                notify "${title}" "${artist}\n${album}"
+            fi
+            ;;
+        play)
+            mpc play
+            ;;
+        pause)
+            mpc pause
+            ;;
+        toggle)
+            mpc toggle
+            ;;
+        stop)
+            mpc stop
+            ;;
+        previous)
+            mpc prev
+            ;;
+        next)
+            mpc next
+            ;;
+        *)
+            echo "ERROR: mpd/mpc: unknown command!"
+            exit 11
+            ;;
+    esac
+}
+
+
+# moc/mocp
+player_mocp() {
+    case "$1" in
+        state)
+            state=`mocp -Q "%state"`
+            [ "${state}" = "PLAY"  ] && echo "playing"
+            [ "${state}" = "STOP"  ] && echo "stopped"
+            [ "${state}" = "PAUSE" ] && echo "paused"
+            ;;
+        info)
+            state=`mocp -Q "%state"`
+            if [ "${state}" = "STOP" ]; then
+                notify "MOC" "stopped"
+            else
+                artist=`mocp -Q "%artist"`
+                album=`mocp -Q "%album"`
+                title=`mocp -Q "%song"`
+                notify "${title}" "${artist}\n${album}"
+            fi
+            ;;
+        play)
+            state=`mocp -Q "%state"`
+            [ "${state}" = "STOP" ] && mocp -p || mocp -U
+            ;;
+        pause)
+            mocp -P
+            ;;
+        toggle)
+            mocp -G
+            ;;
+        stop)
+            mocp -s
+            ;;
+        previous)
+            mocp -r
+            ;;
+        next)
+            mocp -f
+            ;;
+        *)
+            echo "ERROR: mocp: unknown command!"
+            exit 21
+            ;;
+    esac
+}
+
+
+for player in ${PLAYERS}; do
+    if pgrep -x ${player} >/dev/null 2>&1; then
+        player_cmd="player_${player}"
+        #echo "Found player: ${player}"
+        break
+    fi
+done
+
+if [ -n "${player_cmd}" ]; then
+    eval ${player_cmd} "$1"
+else
+    echo "ERROR: no known music player running/found"
+    exit 31
+fi
+
diff --git a/_bin/volume.sh b/_bin/volume.sh
new file mode 100755
index 0000000..f8558d9
--- /dev/null
+++ b/_bin/volume.sh
@@ -0,0 +1,78 @@
+#!/bin/sh
+#
+# Volume control wrapper to support different systems.
+#
+# Aaron LI
+# Created: 2016-01-07
+# Updated: 2016-01-07
+#
+
+# ALSA device/driver (Linux)
+ALSA_DEV="Master"
+# OSS device (FreeBSD/DragonFly)
+OSS_DEV="vol"
+
+
+if [ $# -ne 1 ]; then
+    echo "Usage:"
+    echo "    `basename $0` < +% | -% | toggle | mute | unmute >"
+    exit 1
+fi
+
+
+# amixer: Linux ALSA
+vol_amixer() {
+    case "$1" in
+        toggle)
+            amixer set ${ALSA_DEV} toggle
+            ;;
+        mute)
+            amixer set ${ALSA_DEV} mute
+            ;;
+        unmute)
+            amixer set ${ALSA_DEV} unmute
+            ;;
+        +[1-9]*|-[1-9]*)
+            sign=`echo "$1" | cut -c1`
+            value="${1#?}"
+            amixer set ${ALSA_DEV} "${value}%${sign}" unmute
+            ;;
+        *)
+            echo "ERROR: amixer: unknown control command"
+            exit 11
+            ;;
+    esac
+}
+
+
+# mixer: FreeBSD/DragonFly OSS
+vol_mixer() {
+    # FIXME: how to toggle/mute/unmute ???
+    case "$1" in
+        +[1-9]*|-[1-9]*)
+            sign=`echo "$1" | cut -c1`
+            value="${1#?}"
+            mixer ${OSS_DEV} "${sign}${value}:${sign}${value}"
+            ;;
+        *)
+            echo "ERROR: mixer: unknown control command"
+            exit 21
+            ;;
+    esac
+}
+
+
+OS=`uname -s`
+case "${OS}" in
+    Linux)
+        vol_amixer "$1"
+        ;;
+    FreeBSD|DragonFly)
+        vol_mixer "$1"
+        ;;
+    *)
+        echo "ERROR: currently unsupport operating system"
+        exit 2
+        ;;
+esac
+