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

1 files changed, 78 insertions, 0 deletions

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
+