Alsasound script

alsasound (text/plain), 6.17 KB, created by Ian Truelsen on 2004-12-02 15:23:01 UTC

#!/sbin/runscript
# $Header: /var/cvsroot/gentoo-x86/media-sound/alsa-utils/files/alsasound,v 1.17 2004/10/30 01:42:11 eradicator Exp $
#
# Gentoo users: add this script to 'boot' run level.
# ==================================================
#
# alsasound     	This shell script takes care of starting and stopping
#               	the ALSA sound driver.
#
# This script requires /usr/sbin/alsactl and /usr/bin/aconnect programs
# from the alsa-utils package.
#
# Copyright (c) by Jaroslav Kysela <[e-mail]> 
#
#
#  This program is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License as published by
#  the Free Software Foundation; either version 2 of the License, or
#  (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
#
#  You should have received a copy of the GNU General Public License
#  along with this program; if not, write to the Free Software
#  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA

# ChangeLog:
#
# 2003.07.29 - John Mylchreest <[e-mail]>
# Edited to support Linux kernel 2.5 and above as well as 2.4
#
# 2004.06.02 - Jeremy Huddleston <[e-mail]>
# Rewritten for better support for built-in drivers 
#
# 2004.10.29 - Jeremy Huddleston <[e-mail]>
# Cleaned up to work better for mixed builtin/module systems

alsactl=/usr/sbin/alsactl
asoundcfg=/etc/asound.state
aconnect=/usr/bin/aconnect
alsascrdir=/etc/alsa.d

depend() {
	need bootmisc localmount
	after modules isapnp coldplug hotplug
}

load_modules() {
	# List of drivers for each card.
	DRIVERS="$(modprobe -c | grep -E "^[[:space:]]*alias[[:space:]]+snd-card-[[:digit:]]" | awk '{print $3}')"

	# Fall back on the automated aliases if we don't have ALSA configured properly...
	if [ -z "${DRIVERS}" ] && ! ([ -d /proc/asound ] && [ -z "$(grep ' no soundcards ' /proc/asound/cards)" ]); then
		ewarn "Could not detect custom ALSA settings.  Loading all detected alsa drivers."
		DRIVERS="$(modprobe -c | grep pci: |  awk '{ print $3 }' | grep snd.* | sort | uniq)"
		[ -z "${DRIVERS}" ] && eerror "Unable to find any ALSA drivers. Have you compiled alsa-drivers correctly?"
	fi

	if modprobe -c | grep -q "snd.*oss$" ; then
		# Test for use of OSS
		OSS="$(modprobe -l | grep "snd.*oss" | sed -e "s:\/.*\/::" -e "s:\..*::")"
		# Add oss modules to list
		for i in ${OSS}
		do
			DRIVERS="${DRIVERS} ${i}"
		done
	fi

	# We want to ensure snd-seq is loaded as it is needed for things like timidity even if
	# we don't use a real sequencer.
	DRIVERS="${DRIVERS} $(modprobe -l | grep "snd.seq\." | sed -e "s:\/.*\/::" -e "s:\..*::")"

	for DRIVER in ${DRIVERS}
	do
		if [ ! "${DRIVER}" = off ] &&
		   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${DRIVER}\$"` ] &&
		   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${DRIVER//-/_}\$"` ]; then
			ebegin "  Loading: ${DRIVER}"
			/sbin/modprobe ${DRIVER}
			eend $?
		fi
	done
		
	sleep 1

	if [ -f /proc/asound/seq/drivers ] ; then
#		SEQUENCERS="$(head /proc/asound/seq/drivers | awk -F, '$2~/^empty$/ {print $1}')"
		SEQUENCERS=""
		for SEQUENCER in ${SEQUENCERS}
		do
			if [ -z `cut -d' ' -f1 /proc/modules | egrep "^${SEQUENCER}\$"` ] &&
			   [ -z `cut -d' ' -f1 /proc/modules | egrep "^${SEQUENCER//-/_}\$"` ]; then
				ebegin "  Loading: ${SEQUENCER}"
				/sbin/modprobe ${SEQUENCER}
				eend $?
			fi
		done
	fi
		
	for DRIVER in ${DRIVERS}
	do
		TMP=${DRIVER##snd-}
		TMP=${TMP##snd_}
		if [ -x "${alsascrdir}/${TMP}" ]; then
			ebegin "  Running: ${alsascrdir}/${TMP}"
			${alsascrdir}/${TMP}
			eend $?
		fi
	done
		
	if [ ! -d /proc/asound ] || [ ! -z "$(grep ' no soundcards ' /proc/asound/cards)" ]; then
		eerror "ERROR: Failed to load necessary drivers"
	fi
}

unload_modules() {
	LOADED_MODULES="$(/sbin/lsmod | grep -E "^snd" | awk '{print $1}')"
	for MODULE in ${LOADED_MODULES}
	do
		/sbin/rmmod ${MODULE} >& /dev/null
	done
	/sbin/rmmod soundcore >& /dev/null
	/sbin/rmmod gameport >& /dev/null	

	# Return success if the modules are unloaded
	test -z "$(/sbin/lsmod | grep -E "^snd" | awk '{print $1}')"
}

terminate() {
	#
	# Kill processes holding open sound devices
	#
	# DEVS=`find /dev/ -follow -type c -maxdepth 1 -print 2>/dev/null | xargs ls -dils | grep "1*1[46]," | cut -d: -f2 | cut -d" " -f2; echo /proc/asound/dev/*`
	ossdevs="/dev/admmidi? /dev/adsp? /dev/amidi? /dev/audio* /dev/dmfm* \
			/dev/dmmidi? /dev/dsp* /dev/dspW* /dev/midi0? /dev/mixer? /dev/music \
			/dev/patmgr? /dev/sequencer* /dev/sndstat"
	alsadevs="/proc/asound/dev/* /dev/sound/* /dev/snd/*"
	fuser -k $ossdevs $alsadevs 2> /dev/null 1>/dev/null
	
	#
	# remove all sequencer connections if any
	#
	[ -f /proc/asound/seq/clients -a -x $aconnect ] && $aconnect --removeall
}

restore_mixer() {
	if [ ! -r $asoundcfg ]; then
		ewarn "No mixer config in $asoundcfg, you have to unmute your card!"
		return 1
	elif [ -x $alsactl ]; then
#		CARDS="$(head /proc/asound/cards | awk '/: / { print $1 }')"
#		for CARDNUM in ${CARDS}
#		do
#			[ -e /dev/snd/controlC0 ] || sleep 2
#			[ -e /dev/snd/controlC0 ] || sleep 2
#			[ -e /dev/snd/controlC0 ] || sleep 2
#			[ -e /dev/snd/controlC0 ] || sleep 2
#			$alsactl -f $asoundcfg restore ${CARDNUM}
#		done
		$alsactl -f $asoundcfg restore
	else
		eerror -e "ERROR: Cannot find alsactl, did you forget to install media-sound/alsa-utils?"
		return 1
	fi

	return 0
}

save_mixer() {
	if [ -x $alsactl ]; then
		$alsactl -f $asoundcfg store
	else
		eerror -e "ERROR: Cannot find alsactl, did you forget to install media-sound/alsa-utils?"
		return 1
	fi

	return 0
}

start() {
	ebegin "Loading ALSA drivers"
	if load_modules; then
		eend 0
	else
		eend 1
		return 1
	fi
	
	einfo "Restoring Mixer Levels"
	restore_mixer
	eend 0
}

stop() {
	if [ ! -d /proc/asound ] ; then
		eerror "ALSA is not loaded"
		return 0
	fi
	
	ebegin "Unloading ALSA"
	terminate
	eend 0

	if [ "${SAVE_ON_STOP}" = "yes" ]; then
		einfo "Storing ALSA Mixer Levels"
		if save_mixer; then
			eend 0
		else
			eend 1
		fi
	fi

	einfo "Unloading modules"
	if unload_modules; then
		eend 0
	else
		eend 1
	fi
}