#!/bin/sh
# Load the mixer settings and OSS compatibility for ALSA.
# (the Advanced Linux Sound Architecture)

# A function to load the ALSA mixer settings:
load_alsa_mixer() {
  ### modified for Live ###
  # Volume is muted by default. Set it to 71% unless nosound boot option given:
  if ! cat /proc/cmdline | grep -w nosound >/dev/null 2>/dev/null; then
    if [ -r /etc/asound.state ]; then
      echo "Loading ALSA mixer settings:  /usr/sbin/alsactl restore"
      /usr/sbin/alsactl restore
    else
      echo "Setting sound volume: 71%"
      for SCONTROL in {"Master","PCM","Front","Surround","Center","CD","Video","Wave","Music","AC97","Headphone"}; do
        /usr/bin/amixer -q sset $SCONTROL 71% unmute 2>/dev/null
      done
    fi
  fi
  ### /modified for Live ###
}

# A function to load the ALSA OSS compat modules:
load_alsa_oss_modules() {
  if ! cat /proc/modules | tr _ - | grep -wq snd-pcm-oss ; then
    echo "Loading OSS compatibility modules for ALSA."
    modprobe snd-pcm-oss
    modprobe snd-seq-oss
    modprobe snd-mixer-oss
  fi
}

# If hotplug or something else has loaded the ALSA modules, then
# simply load the mixer settings and make sure the OSS compat
# modules are loaded:
if [ -d /proc/asound ]; then
  load_alsa_oss_modules
  load_alsa_mixer
else
  # If there are ALSA modules defined in /etc/modprobe.conf, but
  # ALSA is not yet loaded, then load the modules now:
  DRIVERS=$(modprobe -c | grep -E "^[[:space:]]*alias[[:space:]]+snd-card-[[:digit:]]" | tr -s "[[:blank:]]" " " | cut -d " " -f 3)
  if [ ! "$DRIVERS" = "" ]; then
    echo "Loading ALSA kernel modules."
    for module in $DRIVERS; do
      modprobe $module
    done
  fi
  # If ALSA is now up, then load the mixer settings and OSS modules:
  if [ -d /proc/asound ]; then
    load_alsa_oss_modules
    load_alsa_mixer
  fi
fi