Initial files

.gitignore

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+sink_names.sh

README.txt

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+This is a small pulseaudio script library, written to be used with keyboard shortcuts. However, it can also help in command line audio control.
+
+IMPORTANT: set_all_sink.sh sources a file called sink_names.sh, this file should define a variable named $bluetooth_sink_name containing the identifying string for a specific device (i.e. the MAC address) like this:
+
+#sink_names.sh
+#!/bin/bash
+
+bluetooth_sink_name="00_00_00_00_00_00"
+
+To change the audio output device, use set_all_sink.sh
+To change the master volume, use set_current_sink_volume.sh

set_all_sink.sh

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+#!/bin/bash
+
+source stdlib.sh
+source sink_names.sh
+
+while getopts 'vs' opt ; do
+   case "$opt" in
+      v) verbosity=VERBOSE ;;
+      s) verbosity=SILENT ;;
+   esac
+done
+
+newSink=${@:$OPTIND:1}
+
+if [ -z "$newSink" ]; then
+   error "Usage: $0 [OPTION] <sinkId/sinkName>"
+   error " -v     print verbose output"
+   error " -s     don't print any output"
+   error "Valid sinks:"
+   error "$(pactl list short sinks)"
+   exit 1
+fi
+
+case "$newSink" in
+   'bluetooth')
+      newSink=`pactl list short sinks | grep "$bluetooth_sink_name" | cut -f 1` ;;
+   'analog')
+      newSink=`pactl list short sinks | grep analog-stereo | cut -f 1` ;;
+   'hdmi')
+      newSink=`pactl list short sinks | grep hdmi-stereo-extra1 | cut -f 1` ;;
+esac
+
+
+pactl list short sink-inputs 2> >(error) |while read stream; do
+   streamId=$(echo $stream|cut '-d ' -f1)
+   log "moving stream $streamId"
+   pactl move-sink-input "$streamId" "$newSink" > >(log) 2> >(error) 
+done
+
+pacmd set-default-sink "$newSink" > >(log) 2> >(error) # to change toolbar item

set_current_sink_volume.sh

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+#!/bin/bash
+
+source stdlib.sh
+
+while getopts 'vsasp' opt ; do
+   case "$opt" in
+      v) verbosity=VERBOSE ;;
+      q) verbosity=QUIET;;
+      a) relative=ADD;;
+      s) relative=SUBTRACT;;
+      p) percentage=true ;;
+   esac
+done
+
+value=${@:$OPTIND:1}
+log "value: ${value}"
+
+if [ -z "$value" ]; then
+    error "Usage: $0 [OPTION] <volume>"
+    error " -v     print verbose output"
+    error " -q     quiet; don't print any output"
+    error " -a     relative; add value to current volume"
+    error " -s     relative; subtract value from current volume"
+    error " -p     interpret value as a percentage instead of an abosolute value"
+    exit 1
+fi
+
+default_sink=`pactl info 2> >(error) | grep "Default Sink" | cut -d ' ' -f 3`
+default_sink_id=`pactl list sinks short | grep "$default_sink" | cut -f 1`
+log "default sink: #${default_sink_id}: ${default_sink}"
+
+if [ -n "$relative" ]; then
+   if [ "$percentage" = 'true' ]; then
+      current_percentage=`pactl list sinks 2> >(error) | grep '^[[:space:]]Volume:' | head -n $(( ${default_sink_id} + 1 )) | tail -n 1 | sed -e 's,.* \([0-9][0-9]*\)%.*,\1,'`
+      log "current percentage: ${current_percentage}"
+      value_percentage=$(echo "scale=2; "$value" / 65536 * 100" | bc 2> >(error) )
+      log "value percentage: ${value_percentage}"
+
+      if [ "$relative" = 'ADD' ]; then
+         value=$((current_percentage + value ))
+      elif [ "$relative" = 'SUBTRACT' ]; then
+         value=$((current_percentage - value ))
+      fi
+      log "new percentage: ${value}"
+   else
+      current_volume=`pactl list sinks 2> >(error) | grep '^[[:space:]]Volume:' | head -n $(( ${default_sink_id} + 1 )) | tail -n 1 | cut -d ' ' -f 3`
+      log "current volume: ${current_volume}"
+
+      if [ "$relative" = 'ADD' ]; then
+         value=$((current_volume + value))
+      elif [ "$relative" = 'SUBTRACT' ]; then
+         value=$((current_volume - value))
+      fi
+      log "new volume: ${value}"
+   fi
+fi
+
+if [ "$percentage" = 'true' ]; then
+   value=$(echo "scale=2; 65536 * ("$value" / 100)" | bc 2> >(error) )
+   log "new volume: ${value}"
+fi
+value=$( printf "%.0f" "$value" 2> >(error) )
+if [ "$value" -lt 0 ]; then value=0; fi
+if [ "$value" -gt 98304 ]; then value=98304; fi
+log "rounded value: ${value}"
+
+pactl set-sink-volume "$default_sink" "$value" > >(log) 2> >(error) 

stdlib.sh

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+#!/bin/bash
+
+function log () {
+   # if argument is given, echo argument, if stream is piped, echo each line of stream
+   if [ "$verbosity" != 'VERBOSE' ] ; then return 0; fi
+   if [ -n "$1" ]; then
+      echo "$1"
+   else
+      while read line
+      do
+         if [ -n "$line" ]; then
+            echo "$line"
+         fi
+      done
+   fi
+}
+
+function error () {
+   # if argument is given, echo argument to stderr, if stream is piped, echo each line of stream to stderr
+   if [ "$verbosity" = 'SILENT' ]; then return 0; fi
+   if [ -n "$1" ]; then
+      echo "$1" >&2
+   else
+      while read line
+      do
+         if [ -n "$line" ]; then
+            echo "$line" >&2
+         fi
+      done
+   fi
+}
+