--- /dev/null
+0.0.8 -> 0.0.9
+
+* Makefile and configure.in changes
+ - added check for alsa driver package
+ - added spec file for RPM
+
+0.0.7 -> 0.0.8
+
+* added LGPL notice to all source and header files
+
+0.0.6 -> 0.0.7
+
+* added snd_cards_name function
+
+0.0.5 -> 0.0.6
+
+* fixed SND_PCM_OPEN constants
+
+0.0.4 -> 0.0.5
+
+* added snd_cards_mask function
+* added info functions for pcm playback/record in control interface
+* fixed Makefile bugs for shared library (added -fPIC)
+
+0.0.3 -> 0.0.4
+
+* changed COPYING policy from GPL to LGPL
+* fixed bug in snd_mixer_channel_read & write
+* added mixer exact support
+* added pcm time mode support
+* 'make install' is now possible
+
+0.0.2 -> 0.0.3
+
+* corrected documentation
+
+0.0.1 -> 0.0.2
+
+* added file COPYING
+* added documentation in sgml + plan.txt
+* minor changes in API for MIXER & PCM
--- /dev/null
+ GNU LIBRARY GENERAL PUBLIC LICENSE
+ Version 2, June 1991
+
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+ <signature of Ty Coon>, 1 April 1990
+ Ty Coon, President of Vice
+
+That's all there is to it!
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+ifeq (Makefile.conf,$(wildcard Makefile.conf))
+include Makefile.conf
+else
+dummy:
+ @echo
+ @echo "Please, run configure script as first..."
+ @echo
+endif
+
+
+all: include/soundlib.h
+ $(MAKE) -C src
+ $(MAKE) -C doc
+ @echo
+ @echo "ALSA library were sucessfully compiled."
+ @echo
+
+include/soundlib.h: include/header.h include/version.h include/error.h include/footer.h \
+ include/control.h include/mixer.h include/pcm.h
+ cat include/header.h include/version.h include/error.h \
+ include/control.h include/mixer.h \
+ include/pcm.h \
+ include/footer.h > include/soundlib.h
+
+install: all
+ $(INSTALL) -m 644 -o root -g root include/soundlib.h ${includedir}/sys
+ $(INSTALL) -m 644 -o root -g root lib/libsound.a ${libdir}
+ $(LN_S) -f libsound.so.${SND_LIB_VERSION} ${libdir}/libsound.so
+ $(LN_S) -f libsound.so.${SND_LIB_VERSION} ${libdir}/libsound.so.${SND_LIB_MAJOR}
+ $(INSTALL) -m 644 -o root -g root lib/libsound.so.${SND_LIB_VERSION} ${libdir}
+ /sbin/ldconfig
+
+clean:
+ $(MAKE) -C include clean
+ $(MAKE) -C src clean
+ $(MAKE) -C test clean
+ $(MAKE) -C doc clean
+ $(MAKE) -C utils clean
+ rm -f core .depend *.o *.orig *~
+ rm -f `find . -name "out.txt"`
+
+pack: clean
+ rm -f config.cache config.log config.status Makefile.conf
+ chown -R root.root ../alsa-lib
+ tar cvz -C .. -f ../alsa-lib-$(SND_LIB_VERSION).tar.gz alsa-lib
+
+publish: pack
+ cat ../alsa-lib-$(SND_LIB_VERSION).tar.gz | \
+ ssh -l root zarquon.jcu.cz /home/alsa/publishlib alsa-lib-$(SND_LIB_VERSION).tar.gz
--- /dev/null
+#
+# Configuration Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+srcdir=@srcdir@
+VPATH=@srcdir@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+includedir=@includedir@
+libdir=@libdir@
+c_opts=@CFLAGS@
+INSTALL=@INSTALL@
+SND_LIB_VERSION=@SND_LIB_VERSION@
+SND_LIB_MAJOR=@SND_LIB_MAJOR@
+SND_LIB_MINOR=@SND_LIB_MINOR@
+SND_LIB_SUBMINOR=@SND_LIB_SUBMINOR@
+
+CC=@CC@
+CPP=@CPP@
+INCLUDE=-I../include -I../../include
+COPTS = $(c_opts)
+COPTS += -Wall -Wstrict-prototypes -fomit-frame-pointer -pipe
+LINKER=ld
+LN_S=@LN_S@
--- /dev/null
+#! /bin/sh
+
+# Guess values for system-dependent variables and create Makefiles.
+# Generated automatically using autoconf version 2.12
+# Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc.
+#
+# This configure script is free software; the Free Software Foundation
+# gives unlimited permission to copy, distribute and modify it.
+
+# Defaults:
+ac_help=
+ac_default_prefix=/usr/local
+# Any additions from configure.in:
+ac_default_prefix=/usr
+
+# Initialize some variables set by options.
+# The variables have the same names as the options, with
+# dashes changed to underlines.
+build=NONE
+cache_file=./config.cache
+exec_prefix=NONE
+host=NONE
+no_create=
+nonopt=NONE
+no_recursion=
+prefix=NONE
+program_prefix=NONE
+program_suffix=NONE
+program_transform_name=s,x,x,
+silent=
+site=
+srcdir=
+target=NONE
+verbose=
+x_includes=NONE
+x_libraries=NONE
+bindir='${exec_prefix}/bin'
+sbindir='${exec_prefix}/sbin'
+libexecdir='${exec_prefix}/libexec'
+datadir='${prefix}/share'
+sysconfdir='${prefix}/etc'
+sharedstatedir='${prefix}/com'
+localstatedir='${prefix}/var'
+libdir='${exec_prefix}/lib'
+includedir='${prefix}/include'
+oldincludedir='/usr/include'
+infodir='${prefix}/info'
+mandir='${prefix}/man'
+
+# Initialize some other variables.
+subdirs=
+MFLAGS= MAKEFLAGS=
+# Maximum number of lines to put in a shell here document.
+ac_max_here_lines=12
+
+ac_prev=
+for ac_option
+do
+
+ # If the previous option needs an argument, assign it.
+ if test -n "$ac_prev"; then
+ eval "$ac_prev=\$ac_option"
+ ac_prev=
+ continue
+ fi
+
+ case "$ac_option" in
+ -*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+ *) ac_optarg= ;;
+ esac
+
+ # Accept the important Cygnus configure options, so we can diagnose typos.
+
+ case "$ac_option" in
+
+ -bindir | --bindir | --bindi | --bind | --bin | --bi)
+ ac_prev=bindir ;;
+ -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+ bindir="$ac_optarg" ;;
+
+ -build | --build | --buil | --bui | --bu)
+ ac_prev=build ;;
+ -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+ build="$ac_optarg" ;;
+
+ -cache-file | --cache-file | --cache-fil | --cache-fi \
+ | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+ ac_prev=cache_file ;;
+ -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+ | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+ cache_file="$ac_optarg" ;;
+
+ -datadir | --datadir | --datadi | --datad | --data | --dat | --da)
+ ac_prev=datadir ;;
+ -datadir=* | --datadir=* | --datadi=* | --datad=* | --data=* | --dat=* \
+ | --da=*)
+ datadir="$ac_optarg" ;;
+
+ -disable-* | --disable-*)
+ ac_feature=`echo $ac_option|sed -e 's/-*disable-//'`
+ # Reject names that are not valid shell variable names.
+ if test -n "`echo $ac_feature| sed 's/[-a-zA-Z0-9_]//g'`"; then
+ { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+ fi
+ ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+ eval "enable_${ac_feature}=no" ;;
+
+ -enable-* | --enable-*)
+ ac_feature=`echo $ac_option|sed -e 's/-*enable-//' -e 's/=.*//'`
+ # Reject names that are not valid shell variable names.
+ if test -n "`echo $ac_feature| sed 's/[-_a-zA-Z0-9]//g'`"; then
+ { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+ fi
+ ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+ case "$ac_option" in
+ *=*) ;;
+ *) ac_optarg=yes ;;
+ esac
+ eval "enable_${ac_feature}='$ac_optarg'" ;;
+
+ -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+ | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+ | --exec | --exe | --ex)
+ ac_prev=exec_prefix ;;
+ -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+ | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+ | --exec=* | --exe=* | --ex=*)
+ exec_prefix="$ac_optarg" ;;
+
+ -gas | --gas | --ga | --g)
+ # Obsolete; use --with-gas.
+ with_gas=yes ;;
+
+ -help | --help | --hel | --he)
+ # Omit some internal or obsolete options to make the list less imposing.
+ # This message is too long to be a string in the A/UX 3.1 sh.
+ cat << EOF
+Usage: configure [options] [host]
+Options: [defaults in brackets after descriptions]
+Configuration:
+ --cache-file=FILE cache test results in FILE
+ --help print this message
+ --no-create do not create output files
+ --quiet, --silent do not print \`checking...' messages
+ --version print the version of autoconf that created configure
+Directory and file names:
+ --prefix=PREFIX install architecture-independent files in PREFIX
+ [$ac_default_prefix]
+ --exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
+ [same as prefix]
+ --bindir=DIR user executables in DIR [EPREFIX/bin]
+ --sbindir=DIR system admin executables in DIR [EPREFIX/sbin]
+ --libexecdir=DIR program executables in DIR [EPREFIX/libexec]
+ --datadir=DIR read-only architecture-independent data in DIR
+ [PREFIX/share]
+ --sysconfdir=DIR read-only single-machine data in DIR [PREFIX/etc]
+ --sharedstatedir=DIR modifiable architecture-independent data in DIR
+ [PREFIX/com]
+ --localstatedir=DIR modifiable single-machine data in DIR [PREFIX/var]
+ --libdir=DIR object code libraries in DIR [EPREFIX/lib]
+ --includedir=DIR C header files in DIR [PREFIX/include]
+ --oldincludedir=DIR C header files for non-gcc in DIR [/usr/include]
+ --infodir=DIR info documentation in DIR [PREFIX/info]
+ --mandir=DIR man documentation in DIR [PREFIX/man]
+ --srcdir=DIR find the sources in DIR [configure dir or ..]
+ --program-prefix=PREFIX prepend PREFIX to installed program names
+ --program-suffix=SUFFIX append SUFFIX to installed program names
+ --program-transform-name=PROGRAM
+ run sed PROGRAM on installed program names
+EOF
+ cat << EOF
+Host type:
+ --build=BUILD configure for building on BUILD [BUILD=HOST]
+ --host=HOST configure for HOST [guessed]
+ --target=TARGET configure for TARGET [TARGET=HOST]
+Features and packages:
+ --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
+ --enable-FEATURE[=ARG] include FEATURE [ARG=yes]
+ --with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
+ --without-PACKAGE do not use PACKAGE (same as --with-PACKAGE=no)
+ --x-includes=DIR X include files are in DIR
+ --x-libraries=DIR X library files are in DIR
+EOF
+ if test -n "$ac_help"; then
+ echo "--enable and --with options recognized:$ac_help"
+ fi
+ exit 0 ;;
+
+ -host | --host | --hos | --ho)
+ ac_prev=host ;;
+ -host=* | --host=* | --hos=* | --ho=*)
+ host="$ac_optarg" ;;
+
+ -includedir | --includedir | --includedi | --included | --include \
+ | --includ | --inclu | --incl | --inc)
+ ac_prev=includedir ;;
+ -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \
+ | --includ=* | --inclu=* | --incl=* | --inc=*)
+ includedir="$ac_optarg" ;;
+
+ -infodir | --infodir | --infodi | --infod | --info | --inf)
+ ac_prev=infodir ;;
+ -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*)
+ infodir="$ac_optarg" ;;
+
+ -libdir | --libdir | --libdi | --libd)
+ ac_prev=libdir ;;
+ -libdir=* | --libdir=* | --libdi=* | --libd=*)
+ libdir="$ac_optarg" ;;
+
+ -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \
+ | --libexe | --libex | --libe)
+ ac_prev=libexecdir ;;
+ -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \
+ | --libexe=* | --libex=* | --libe=*)
+ libexecdir="$ac_optarg" ;;
+
+ -localstatedir | --localstatedir | --localstatedi | --localstated \
+ | --localstate | --localstat | --localsta | --localst \
+ | --locals | --local | --loca | --loc | --lo)
+ ac_prev=localstatedir ;;
+ -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+ | --localstate=* | --localstat=* | --localsta=* | --localst=* \
+ | --locals=* | --local=* | --loca=* | --loc=* | --lo=*)
+ localstatedir="$ac_optarg" ;;
+
+ -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+ ac_prev=mandir ;;
+ -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+ mandir="$ac_optarg" ;;
+
+ -nfp | --nfp | --nf)
+ # Obsolete; use --without-fp.
+ with_fp=no ;;
+
+ -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+ | --no-cr | --no-c)
+ no_create=yes ;;
+
+ -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+ | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+ no_recursion=yes ;;
+
+ -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+ | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+ | --oldin | --oldi | --old | --ol | --o)
+ ac_prev=oldincludedir ;;
+ -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+ | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+ | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+ oldincludedir="$ac_optarg" ;;
+
+ -prefix | --prefix | --prefi | --pref | --pre | --pr | --p)
+ ac_prev=prefix ;;
+ -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*)
+ prefix="$ac_optarg" ;;
+
+ -program-prefix | --program-prefix | --program-prefi | --program-pref \
+ | --program-pre | --program-pr | --program-p)
+ ac_prev=program_prefix ;;
+ -program-prefix=* | --program-prefix=* | --program-prefi=* \
+ | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*)
+ program_prefix="$ac_optarg" ;;
+
+ -program-suffix | --program-suffix | --program-suffi | --program-suff \
+ | --program-suf | --program-su | --program-s)
+ ac_prev=program_suffix ;;
+ -program-suffix=* | --program-suffix=* | --program-suffi=* \
+ | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*)
+ program_suffix="$ac_optarg" ;;
+
+ -program-transform-name | --program-transform-name \
+ | --program-transform-nam | --program-transform-na \
+ | --program-transform-n | --program-transform- \
+ | --program-transform | --program-transfor \
+ | --program-transfo | --program-transf \
+ | --program-trans | --program-tran \
+ | --progr-tra | --program-tr | --program-t)
+ ac_prev=program_transform_name ;;
+ -program-transform-name=* | --program-transform-name=* \
+ | --program-transform-nam=* | --program-transform-na=* \
+ | --program-transform-n=* | --program-transform-=* \
+ | --program-transform=* | --program-transfor=* \
+ | --program-transfo=* | --program-transf=* \
+ | --program-trans=* | --program-tran=* \
+ | --progr-tra=* | --program-tr=* | --program-t=*)
+ program_transform_name="$ac_optarg" ;;
+
+ -q | -quiet | --quiet | --quie | --qui | --qu | --q \
+ | -silent | --silent | --silen | --sile | --sil)
+ silent=yes ;;
+
+ -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb)
+ ac_prev=sbindir ;;
+ -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \
+ | --sbi=* | --sb=*)
+ sbindir="$ac_optarg" ;;
+
+ -sharedstatedir | --sharedstatedir | --sharedstatedi \
+ | --sharedstated | --sharedstate | --sharedstat | --sharedsta \
+ | --sharedst | --shareds | --shared | --share | --shar \
+ | --sha | --sh)
+ ac_prev=sharedstatedir ;;
+ -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \
+ | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \
+ | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \
+ | --sha=* | --sh=*)
+ sharedstatedir="$ac_optarg" ;;
+
+ -site | --site | --sit)
+ ac_prev=site ;;
+ -site=* | --site=* | --sit=*)
+ site="$ac_optarg" ;;
+
+ -srcdir | --srcdir | --srcdi | --srcd | --src | --sr)
+ ac_prev=srcdir ;;
+ -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*)
+ srcdir="$ac_optarg" ;;
+
+ -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \
+ | --syscon | --sysco | --sysc | --sys | --sy)
+ ac_prev=sysconfdir ;;
+ -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \
+ | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*)
+ sysconfdir="$ac_optarg" ;;
+
+ -target | --target | --targe | --targ | --tar | --ta | --t)
+ ac_prev=target ;;
+ -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*)
+ target="$ac_optarg" ;;
+
+ -v | -verbose | --verbose | --verbos | --verbo | --verb)
+ verbose=yes ;;
+
+ -version | --version | --versio | --versi | --vers)
+ echo "configure generated by autoconf version 2.12"
+ exit 0 ;;
+
+ -with-* | --with-*)
+ ac_package=`echo $ac_option|sed -e 's/-*with-//' -e 's/=.*//'`
+ # Reject names that are not valid shell variable names.
+ if test -n "`echo $ac_package| sed 's/[-_a-zA-Z0-9]//g'`"; then
+ { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; }
+ fi
+ ac_package=`echo $ac_package| sed 's/-/_/g'`
+ case "$ac_option" in
+ *=*) ;;
+ *) ac_optarg=yes ;;
+ esac
+ eval "with_${ac_package}='$ac_optarg'" ;;
+
+ -without-* | --without-*)
+ ac_package=`echo $ac_option|sed -e 's/-*without-//'`
+ # Reject names that are not valid shell variable names.
+ if test -n "`echo $ac_package| sed 's/[-a-zA-Z0-9_]//g'`"; then
+ { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; }
+ fi
+ ac_package=`echo $ac_package| sed 's/-/_/g'`
+ eval "with_${ac_package}=no" ;;
+
+ --x)
+ # Obsolete; use --with-x.
+ with_x=yes ;;
+
+ -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \
+ | --x-incl | --x-inc | --x-in | --x-i)
+ ac_prev=x_includes ;;
+ -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \
+ | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*)
+ x_includes="$ac_optarg" ;;
+
+ -x-libraries | --x-libraries | --x-librarie | --x-librari \
+ | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l)
+ ac_prev=x_libraries ;;
+ -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \
+ | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
+ x_libraries="$ac_optarg" ;;
+
+ -*) { echo "configure: error: $ac_option: invalid option; use --help to show usage" 1>&2; exit 1; }
+ ;;
+
+ *)
+ if test -n "`echo $ac_option| sed 's/[-a-z0-9.]//g'`"; then
+ echo "configure: warning: $ac_option: invalid host type" 1>&2
+ fi
+ if test "x$nonopt" != xNONE; then
+ { echo "configure: error: can only configure for one host and one target at a time" 1>&2; exit 1; }
+ fi
+ nonopt="$ac_option"
+ ;;
+
+ esac
+done
+
+if test -n "$ac_prev"; then
+ { echo "configure: error: missing argument to --`echo $ac_prev | sed 's/_/-/g'`" 1>&2; exit 1; }
+fi
+
+trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15
+
+# File descriptor usage:
+# 0 standard input
+# 1 file creation
+# 2 errors and warnings
+# 3 some systems may open it to /dev/tty
+# 4 used on the Kubota Titan
+# 6 checking for... messages and results
+# 5 compiler messages saved in config.log
+if test "$silent" = yes; then
+ exec 6>/dev/null
+else
+ exec 6>&1
+fi
+exec 5>./config.log
+
+echo "\
+This file contains any messages produced by compilers while
+running configure, to aid debugging if configure makes a mistake.
+" 1>&5
+
+# Strip out --no-create and --no-recursion so they do not pile up.
+# Also quote any args containing shell metacharacters.
+ac_configure_args=
+for ac_arg
+do
+ case "$ac_arg" in
+ -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+ | --no-cr | --no-c) ;;
+ -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+ | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r) ;;
+ *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*)
+ ac_configure_args="$ac_configure_args '$ac_arg'" ;;
+ *) ac_configure_args="$ac_configure_args $ac_arg" ;;
+ esac
+done
+
+# NLS nuisances.
+# Only set these to C if already set. These must not be set unconditionally
+# because not all systems understand e.g. LANG=C (notably SCO).
+# Fixing LC_MESSAGES prevents Solaris sh from translating var values in `set'!
+# Non-C LC_CTYPE values break the ctype check.
+if test "${LANG+set}" = set; then LANG=C; export LANG; fi
+if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi
+if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi
+if test "${LC_CTYPE+set}" = set; then LC_CTYPE=C; export LC_CTYPE; fi
+
+# confdefs.h avoids OS command line length limits that DEFS can exceed.
+rm -rf conftest* confdefs.h
+# AIX cpp loses on an empty file, so make sure it contains at least a newline.
+echo > confdefs.h
+
+# A filename unique to this package, relative to the directory that
+# configure is in, which we can look for to find out if srcdir is correct.
+ac_unique_file=Makefile.conf.in
+
+# Find the source files, if location was not specified.
+if test -z "$srcdir"; then
+ ac_srcdir_defaulted=yes
+ # Try the directory containing this script, then its parent.
+ ac_prog=$0
+ ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'`
+ test "x$ac_confdir" = "x$ac_prog" && ac_confdir=.
+ srcdir=$ac_confdir
+ if test ! -r $srcdir/$ac_unique_file; then
+ srcdir=..
+ fi
+else
+ ac_srcdir_defaulted=no
+fi
+if test ! -r $srcdir/$ac_unique_file; then
+ if test "$ac_srcdir_defaulted" = yes; then
+ { echo "configure: error: can not find sources in $ac_confdir or .." 1>&2; exit 1; }
+ else
+ { echo "configure: error: can not find sources in $srcdir" 1>&2; exit 1; }
+ fi
+fi
+srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'`
+
+# Prefer explicitly selected file to automatically selected ones.
+if test -z "$CONFIG_SITE"; then
+ if test "x$prefix" != xNONE; then
+ CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site"
+ else
+ CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site"
+ fi
+fi
+for ac_site_file in $CONFIG_SITE; do
+ if test -r "$ac_site_file"; then
+ echo "loading site script $ac_site_file"
+ . "$ac_site_file"
+ fi
+done
+
+if test -r "$cache_file"; then
+ echo "loading cache $cache_file"
+ . $cache_file
+else
+ echo "creating cache $cache_file"
+ > $cache_file
+fi
+
+ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
+ # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
+ if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
+ ac_n= ac_c='
+' ac_t=' '
+ else
+ ac_n=-n ac_c= ac_t=
+ fi
+else
+ ac_n= ac_c='\c' ac_t=
+fi
+
+
+
+
+# Extract the first word of "gcc", so it can be a program name with args.
+set dummy gcc; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:528: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test -n "$CC"; then
+ ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+ for ac_dir in $PATH; do
+ test -z "$ac_dir" && ac_dir=.
+ if test -f $ac_dir/$ac_word; then
+ ac_cv_prog_CC="gcc"
+ break
+ fi
+ done
+ IFS="$ac_save_ifs"
+fi
+fi
+CC="$ac_cv_prog_CC"
+if test -n "$CC"; then
+ echo "$ac_t""$CC" 1>&6
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+if test -z "$CC"; then
+ # Extract the first word of "cc", so it can be a program name with args.
+set dummy cc; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:557: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test -n "$CC"; then
+ ac_cv_prog_CC="$CC" # Let the user override the test.
+else
+ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+ ac_prog_rejected=no
+ for ac_dir in $PATH; do
+ test -z "$ac_dir" && ac_dir=.
+ if test -f $ac_dir/$ac_word; then
+ if test "$ac_dir/$ac_word" = "/usr/ucb/cc"; then
+ ac_prog_rejected=yes
+ continue
+ fi
+ ac_cv_prog_CC="cc"
+ break
+ fi
+ done
+ IFS="$ac_save_ifs"
+if test $ac_prog_rejected = yes; then
+ # We found a bogon in the path, so make sure we never use it.
+ set dummy $ac_cv_prog_CC
+ shift
+ if test $# -gt 0; then
+ # We chose a different compiler from the bogus one.
+ # However, it has the same basename, so the bogon will be chosen
+ # first if we set CC to just the basename; use the full file name.
+ shift
+ set dummy "$ac_dir/$ac_word" "$@"
+ shift
+ ac_cv_prog_CC="$@"
+ fi
+fi
+fi
+fi
+CC="$ac_cv_prog_CC"
+if test -n "$CC"; then
+ echo "$ac_t""$CC" 1>&6
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ test -z "$CC" && { echo "configure: error: no acceptable cc found in \$PATH" 1>&2; exit 1; }
+fi
+
+echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6
+echo "configure:605: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5
+
+ac_ext=c
+# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options.
+ac_cpp='$CPP $CPPFLAGS'
+ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5'
+ac_link='${CC-cc} -o conftest $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5'
+cross_compiling=$ac_cv_prog_cc_cross
+
+cat > conftest.$ac_ext <<EOF
+#line 615 "configure"
+#include "confdefs.h"
+main(){return(0);}
+EOF
+if { (eval echo configure:619: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest; then
+ ac_cv_prog_cc_works=yes
+ # If we can't run a trivial program, we are probably using a cross compiler.
+ if (./conftest; exit) 2>/dev/null; then
+ ac_cv_prog_cc_cross=no
+ else
+ ac_cv_prog_cc_cross=yes
+ fi
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ ac_cv_prog_cc_works=no
+fi
+rm -fr conftest*
+
+echo "$ac_t""$ac_cv_prog_cc_works" 1>&6
+if test $ac_cv_prog_cc_works = no; then
+ { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; }
+fi
+echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6
+echo "configure:639: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5
+echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6
+cross_compiling=$ac_cv_prog_cc_cross
+
+echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6
+echo "configure:644: checking whether we are using GNU C" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.c <<EOF
+#ifdef __GNUC__
+ yes;
+#endif
+EOF
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:653: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then
+ ac_cv_prog_gcc=yes
+else
+ ac_cv_prog_gcc=no
+fi
+fi
+
+echo "$ac_t""$ac_cv_prog_gcc" 1>&6
+
+if test $ac_cv_prog_gcc = yes; then
+ GCC=yes
+ ac_test_CFLAGS="${CFLAGS+set}"
+ ac_save_CFLAGS="$CFLAGS"
+ CFLAGS=
+ echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6
+echo "configure:668: checking whether ${CC-cc} accepts -g" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ echo 'void f(){}' > conftest.c
+if test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then
+ ac_cv_prog_cc_g=yes
+else
+ ac_cv_prog_cc_g=no
+fi
+rm -f conftest*
+
+fi
+
+echo "$ac_t""$ac_cv_prog_cc_g" 1>&6
+ if test "$ac_test_CFLAGS" = set; then
+ CFLAGS="$ac_save_CFLAGS"
+ elif test $ac_cv_prog_cc_g = yes; then
+ CFLAGS="-g -O2"
+ else
+ CFLAGS="-O2"
+ fi
+else
+ GCC=
+ test "${CFLAGS+set}" = set || CFLAGS="-g"
+fi
+
+# Extract the first word of "ranlib", so it can be a program name with args.
+set dummy ranlib; ac_word=$2
+echo $ac_n "checking for $ac_word""... $ac_c" 1>&6
+echo "configure:698: checking for $ac_word" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ if test -n "$RANLIB"; then
+ ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
+else
+ IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
+ for ac_dir in $PATH; do
+ test -z "$ac_dir" && ac_dir=.
+ if test -f $ac_dir/$ac_word; then
+ ac_cv_prog_RANLIB="ranlib"
+ break
+ fi
+ done
+ IFS="$ac_save_ifs"
+ test -z "$ac_cv_prog_RANLIB" && ac_cv_prog_RANLIB=":"
+fi
+fi
+RANLIB="$ac_cv_prog_RANLIB"
+if test -n "$RANLIB"; then
+ echo "$ac_t""$RANLIB" 1>&6
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+ac_aux_dir=
+for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do
+ if test -f $ac_dir/install-sh; then
+ ac_aux_dir=$ac_dir
+ ac_install_sh="$ac_aux_dir/install-sh -c"
+ break
+ elif test -f $ac_dir/install.sh; then
+ ac_aux_dir=$ac_dir
+ ac_install_sh="$ac_aux_dir/install.sh -c"
+ break
+ fi
+done
+if test -z "$ac_aux_dir"; then
+ { echo "configure: error: can not find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." 1>&2; exit 1; }
+fi
+ac_config_guess=$ac_aux_dir/config.guess
+ac_config_sub=$ac_aux_dir/config.sub
+ac_configure=$ac_aux_dir/configure # This should be Cygnus configure.
+
+# Find a good install program. We prefer a C program (faster),
+# so one script is as good as another. But avoid the broken or
+# incompatible versions:
+# SysV /etc/install, /usr/sbin/install
+# SunOS /usr/etc/install
+# IRIX /sbin/install
+# AIX /bin/install
+# AFS /usr/afsws/bin/install, which mishandles nonexistent args
+# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff"
+# ./install, which can be erroneously created by make from ./install.sh.
+echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6
+echo "configure:754: checking for a BSD compatible install" >&5
+if test -z "$INSTALL"; then
+if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS="${IFS}:"
+ for ac_dir in $PATH; do
+ # Account for people who put trailing slashes in PATH elements.
+ case "$ac_dir/" in
+ /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;;
+ *)
+ # OSF1 and SCO ODT 3.0 have their own names for install.
+ for ac_prog in ginstall installbsd scoinst install; do
+ if test -f $ac_dir/$ac_prog; then
+ if test $ac_prog = install &&
+ grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then
+ # AIX install. It has an incompatible calling convention.
+ # OSF/1 installbsd also uses dspmsg, but is usable.
+ :
+ else
+ ac_cv_path_install="$ac_dir/$ac_prog -c"
+ break 2
+ fi
+ fi
+ done
+ ;;
+ esac
+ done
+ IFS="$ac_save_IFS"
+
+fi
+ if test "${ac_cv_path_install+set}" = set; then
+ INSTALL="$ac_cv_path_install"
+ else
+ # As a last resort, use the slow shell script. We don't cache a
+ # path for INSTALL within a source directory, because that will
+ # break other packages using the cache if that directory is
+ # removed, or if the path is relative.
+ INSTALL="$ac_install_sh"
+ fi
+fi
+echo "$ac_t""$INSTALL" 1>&6
+
+# Use test -z because SunOS4 sh mishandles braces in ${var-val}.
+# It thinks the first close brace ends the variable substitution.
+test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}'
+
+test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644'
+
+echo $ac_n "checking whether ln -s works""... $ac_c" 1>&6
+echo "configure:804: checking whether ln -s works" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_LN_S'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ rm -f conftestdata
+if ln -s X conftestdata 2>/dev/null
+then
+ rm -f conftestdata
+ ac_cv_prog_LN_S="ln -s"
+else
+ ac_cv_prog_LN_S=ln
+fi
+fi
+LN_S="$ac_cv_prog_LN_S"
+if test "$ac_cv_prog_LN_S" = "ln -s"; then
+ echo "$ac_t""yes" 1>&6
+else
+ echo "$ac_t""no" 1>&6
+fi
+
+
+echo $ac_n "checking how to run the C preprocessor""... $ac_c" 1>&6
+echo "configure:826: checking how to run the C preprocessor" >&5
+# On Suns, sometimes $CPP names a directory.
+if test -n "$CPP" && test -d "$CPP"; then
+ CPP=
+fi
+if test -z "$CPP"; then
+if eval "test \"`echo '$''{'ac_cv_prog_CPP'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ # This must be in double quotes, not single quotes, because CPP may get
+ # substituted into the Makefile and "${CC-cc}" will confuse make.
+ CPP="${CC-cc} -E"
+ # On the NeXT, cc -E runs the code through the compiler's parser,
+ # not just through cpp.
+ cat > conftest.$ac_ext <<EOF
+#line 841 "configure"
+#include "confdefs.h"
+#include <assert.h>
+Syntax Error
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:847: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+ :
+else
+ echo "$ac_err" >&5
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ CPP="${CC-cc} -E -traditional-cpp"
+ cat > conftest.$ac_ext <<EOF
+#line 858 "configure"
+#include "confdefs.h"
+#include <assert.h>
+Syntax Error
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:864: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+ :
+else
+ echo "$ac_err" >&5
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ CPP=/lib/cpp
+fi
+rm -f conftest*
+fi
+rm -f conftest*
+ ac_cv_prog_CPP="$CPP"
+fi
+ CPP="$ac_cv_prog_CPP"
+else
+ ac_cv_prog_CPP="$CPP"
+fi
+echo "$ac_t""$CPP" 1>&6
+
+echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
+echo "configure:887: checking for ANSI C header files" >&5
+if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 892 "configure"
+#include "confdefs.h"
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <float.h>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:900: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+ rm -rf conftest*
+ ac_cv_header_stdc=yes
+else
+ echo "$ac_err" >&5
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+if test $ac_cv_header_stdc = yes; then
+ # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
+cat > conftest.$ac_ext <<EOF
+#line 917 "configure"
+#include "confdefs.h"
+#include <string.h>
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ egrep "memchr" >/dev/null 2>&1; then
+ :
+else
+ rm -rf conftest*
+ ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+ # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
+cat > conftest.$ac_ext <<EOF
+#line 935 "configure"
+#include "confdefs.h"
+#include <stdlib.h>
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ egrep "free" >/dev/null 2>&1; then
+ :
+else
+ rm -rf conftest*
+ ac_cv_header_stdc=no
+fi
+rm -f conftest*
+
+fi
+
+if test $ac_cv_header_stdc = yes; then
+ # /bin/cc in Irix-4.0.5 gets non-ANSI ctype macros unless using -ansi.
+if test "$cross_compiling" = yes; then
+ :
+else
+ cat > conftest.$ac_ext <<EOF
+#line 956 "configure"
+#include "confdefs.h"
+#include <ctype.h>
+#define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
+#define TOUPPER(c) (ISLOWER(c) ? 'A' + ((c) - 'a') : (c))
+#define XOR(e, f) (((e) && !(f)) || (!(e) && (f)))
+int main () { int i; for (i = 0; i < 256; i++)
+if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
+exit (0); }
+
+EOF
+if { (eval echo configure:967: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+then
+ :
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ ac_cv_header_stdc=no
+fi
+rm -fr conftest*
+fi
+
+fi
+fi
+
+echo "$ac_t""$ac_cv_header_stdc" 1>&6
+if test $ac_cv_header_stdc = yes; then
+ cat >> confdefs.h <<\EOF
+#define STDC_HEADERS 1
+EOF
+
+fi
+
+
+for ac_hdr in linux/sound.h
+do
+ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
+echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
+echo "configure:995: checking for $ac_hdr" >&5
+if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 1000 "configure"
+#include "confdefs.h"
+#include <$ac_hdr>
+EOF
+ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
+{ (eval echo configure:1005: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+ac_err=`grep -v '^ *+' conftest.out`
+if test -z "$ac_err"; then
+ rm -rf conftest*
+ eval "ac_cv_header_$ac_safe=yes"
+else
+ echo "$ac_err" >&5
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ eval "ac_cv_header_$ac_safe=no"
+fi
+rm -f conftest*
+fi
+if eval "test \"`echo '$ac_cv_header_'$ac_safe`\" = yes"; then
+ echo "$ac_t""yes" 1>&6
+ ac_tr_hdr=HAVE_`echo $ac_hdr | sed 'y%abcdefghijklmnopqrstuvwxyz./-%ABCDEFGHIJKLMNOPQRSTUVWXYZ___%'`
+ cat >> confdefs.h <<EOF
+#define $ac_tr_hdr 1
+EOF
+
+else
+ echo "$ac_t""no" 1>&6
+fi
+done
+
+
+echo $ac_n "checking for working const""... $ac_c" 1>&6
+echo "configure:1033: checking for working const" >&5
+if eval "test \"`echo '$''{'ac_cv_c_const'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 1038 "configure"
+#include "confdefs.h"
+
+int main() {
+
+/* Ultrix mips cc rejects this. */
+typedef int charset[2]; const charset x;
+/* SunOS 4.1.1 cc rejects this. */
+char const *const *ccp;
+char **p;
+/* NEC SVR4.0.2 mips cc rejects this. */
+struct point {int x, y;};
+static struct point const zero = {0,0};
+/* AIX XL C 1.02.0.0 rejects this.
+ It does not let you subtract one const X* pointer from another in an arm
+ of an if-expression whose if-part is not a constant expression */
+const char *g = "string";
+ccp = &g + (g ? g-g : 0);
+/* HPUX 7.0 cc rejects these. */
+++ccp;
+p = (char**) ccp;
+ccp = (char const *const *) p;
+{ /* SCO 3.2v4 cc rejects this. */
+ char *t;
+ char const *s = 0 ? (char *) 0 : (char const *) 0;
+
+ *t++ = 0;
+}
+{ /* Someone thinks the Sun supposedly-ANSI compiler will reject this. */
+ int x[] = {25, 17};
+ const int *foo = &x[0];
+ ++foo;
+}
+{ /* Sun SC1.0 ANSI compiler rejects this -- but not the above. */
+ typedef const int *iptr;
+ iptr p = 0;
+ ++p;
+}
+{ /* AIX XL C 1.02.0.0 rejects this saying
+ "k.c", line 2.27: 1506-025 (S) Operand must be a modifiable lvalue. */
+ struct s { int j; const int *ap[3]; };
+ struct s *b; b->j = 5;
+}
+{ /* ULTRIX-32 V3.1 (Rev 9) vcc rejects this */
+ const int foo = 10;
+}
+
+; return 0; }
+EOF
+if { (eval echo configure:1087: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ ac_cv_c_const=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ ac_cv_c_const=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$ac_cv_c_const" 1>&6
+if test $ac_cv_c_const = no; then
+ cat >> confdefs.h <<\EOF
+#define const
+EOF
+
+fi
+
+echo $ac_n "checking for inline""... $ac_c" 1>&6
+echo "configure:1108: checking for inline" >&5
+if eval "test \"`echo '$''{'ac_cv_c_inline'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_cv_c_inline=no
+for ac_kw in inline __inline__ __inline; do
+ cat > conftest.$ac_ext <<EOF
+#line 1115 "configure"
+#include "confdefs.h"
+
+int main() {
+} $ac_kw foo() {
+; return 0; }
+EOF
+if { (eval echo configure:1122: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ ac_cv_c_inline=$ac_kw; break
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+fi
+rm -f conftest*
+done
+
+fi
+
+echo "$ac_t""$ac_cv_c_inline" 1>&6
+case "$ac_cv_c_inline" in
+ inline | yes) ;;
+ no) cat >> confdefs.h <<\EOF
+#define inline
+EOF
+ ;;
+ *) cat >> confdefs.h <<EOF
+#define inline $ac_cv_c_inline
+EOF
+ ;;
+esac
+
+echo $ac_n "checking whether byte ordering is bigendian""... $ac_c" 1>&6
+echo "configure:1148: checking whether byte ordering is bigendian" >&5
+if eval "test \"`echo '$''{'ac_cv_c_bigendian'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_cv_c_bigendian=unknown
+# See if sys/param.h defines the BYTE_ORDER macro.
+cat > conftest.$ac_ext <<EOF
+#line 1155 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+#include <sys/param.h>
+int main() {
+
+#if !BYTE_ORDER || !BIG_ENDIAN || !LITTLE_ENDIAN
+ bogus endian macros
+#endif
+; return 0; }
+EOF
+if { (eval echo configure:1166: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ # It does; now see whether it defined to BIG_ENDIAN or not.
+cat > conftest.$ac_ext <<EOF
+#line 1170 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+#include <sys/param.h>
+int main() {
+
+#if BYTE_ORDER != BIG_ENDIAN
+ not big endian
+#endif
+; return 0; }
+EOF
+if { (eval echo configure:1181: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ ac_cv_c_bigendian=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ ac_cv_c_bigendian=no
+fi
+rm -f conftest*
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+fi
+rm -f conftest*
+if test $ac_cv_c_bigendian = unknown; then
+if test "$cross_compiling" = yes; then
+ { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
+else
+ cat > conftest.$ac_ext <<EOF
+#line 1201 "configure"
+#include "confdefs.h"
+main () {
+ /* Are we little or big endian? From Harbison&Steele. */
+ union
+ {
+ long l;
+ char c[sizeof (long)];
+ } u;
+ u.l = 1;
+ exit (u.c[sizeof (long) - 1] == 1);
+}
+EOF
+if { (eval echo configure:1214: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+then
+ ac_cv_c_bigendian=no
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ ac_cv_c_bigendian=yes
+fi
+rm -fr conftest*
+fi
+
+fi
+fi
+
+echo "$ac_t""$ac_cv_c_bigendian" 1>&6
+if test $ac_cv_c_bigendian = yes; then
+ cat >> confdefs.h <<\EOF
+#define WORDS_BIGENDIAN 1
+EOF
+
+fi
+
+echo $ac_n "checking whether time.h and sys/time.h may both be included""... $ac_c" 1>&6
+echo "configure:1238: checking whether time.h and sys/time.h may both be included" >&5
+if eval "test \"`echo '$''{'ac_cv_header_time'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ cat > conftest.$ac_ext <<EOF
+#line 1243 "configure"
+#include "confdefs.h"
+#include <sys/types.h>
+#include <sys/time.h>
+#include <time.h>
+int main() {
+struct tm *tp;
+; return 0; }
+EOF
+if { (eval echo configure:1252: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+ rm -rf conftest*
+ ac_cv_header_time=yes
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -rf conftest*
+ ac_cv_header_time=no
+fi
+rm -f conftest*
+fi
+
+echo "$ac_t""$ac_cv_header_time" 1>&6
+if test $ac_cv_header_time = yes; then
+ cat >> confdefs.h <<\EOF
+#define TIME_WITH_SYS_TIME 1
+EOF
+
+fi
+
+
+if test $ac_cv_prog_gcc = yes; then
+ echo $ac_n "checking whether ${CC-cc} needs -traditional""... $ac_c" 1>&6
+echo "configure:1275: checking whether ${CC-cc} needs -traditional" >&5
+if eval "test \"`echo '$''{'ac_cv_prog_gcc_traditional'+set}'`\" = set"; then
+ echo $ac_n "(cached) $ac_c" 1>&6
+else
+ ac_pattern="Autoconf.*'x'"
+ cat > conftest.$ac_ext <<EOF
+#line 1281 "configure"
+#include "confdefs.h"
+#include <sgtty.h>
+Autoconf TIOCGETP
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ egrep "$ac_pattern" >/dev/null 2>&1; then
+ rm -rf conftest*
+ ac_cv_prog_gcc_traditional=yes
+else
+ rm -rf conftest*
+ ac_cv_prog_gcc_traditional=no
+fi
+rm -f conftest*
+
+
+ if test $ac_cv_prog_gcc_traditional = no; then
+ cat > conftest.$ac_ext <<EOF
+#line 1299 "configure"
+#include "confdefs.h"
+#include <termio.h>
+Autoconf TCGETA
+EOF
+if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
+ egrep "$ac_pattern" >/dev/null 2>&1; then
+ rm -rf conftest*
+ ac_cv_prog_gcc_traditional=yes
+fi
+rm -f conftest*
+
+ fi
+fi
+
+echo "$ac_t""$ac_cv_prog_gcc_traditional" 1>&6
+ if test $ac_cv_prog_gcc_traditional = yes; then
+ CC="$CC -traditional"
+ fi
+fi
+
+
+myprefix=$prefix
+if test "$myprefix" = "NONE"; then
+ myprefix=$ac_default_prefix
+fi
+CFLAGS="-I$myprefix/include"
+#echo "CFLAGS=$CFLAGS"
+echo $ac_n "checking for alsa-driver package""... $ac_c" 1>&6
+echo "configure:1328: checking for alsa-driver package" >&5
+if test "$cross_compiling" = yes; then
+ echo "$ac_t"""not supported"" 1>&6; echo "Fatal error: Cross-compiling isn't supported..."; exit 1;
+else
+ cat > conftest.$ac_ext <<EOF
+#line 1333 "configure"
+#include "confdefs.h"
+
+#include <linux/sound.h>
+void main(void)
+{
+#ifndef SND_PROTOCOL_VERSION
+ exit(1);
+#else
+ exit(0);
+#endif
+}
+
+EOF
+if { (eval echo configure:1347: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest && (./conftest; exit) 2>/dev/null
+then
+ echo "$ac_t"""present"" 1>&6
+else
+ echo "configure: failed program was:" >&5
+ cat conftest.$ac_ext >&5
+ rm -fr conftest*
+ echo "$ac_t"""not found"" 1>&6; echo "Fatal error: Install alsa-driver package at first..."; exit 1;
+fi
+rm -fr conftest*
+fi
+
+
+echo $ac_n "checking for library version""... $ac_c" 1>&6
+echo "configure:1361: checking for library version" >&5
+SND_LIB_VERSION=`cat $srcdir/version`
+cat >> confdefs.h <<EOF
+#define SND_LIB_VERSION "$SND_LIB_VERSION"
+EOF
+
+
+SND_LIB_MAJOR=`echo $SND_LIB_VERSION | cut -d . -f 1`
+
+SND_LIB_MINOR=`echo $SND_LIB_VERSION | cut -d . -f 2`
+
+SND_LIB_SUBMINOR=`echo $SND_LIB_VERSION | cut -d . -f 3`
+
+echo "$ac_t""$SND_LIB_VERSION" 1>&6
+
+trap '' 1 2 15
+cat > confcache <<\EOF
+# This file is a shell script that caches the results of configure
+# tests run on this system so they can be shared between configure
+# scripts and configure runs. It is not useful on other systems.
+# If it contains results you don't want to keep, you may remove or edit it.
+#
+# By default, configure uses ./config.cache as the cache file,
+# creating it if it does not exist already. You can give configure
+# the --cache-file=FILE option to use a different cache file; that is
+# what configure does when it calls configure scripts in
+# subdirectories, so they share the cache.
+# Giving --cache-file=/dev/null disables caching, for debugging configure.
+# config.status only pays attention to the cache file if you give it the
+# --recheck option to rerun configure.
+#
+EOF
+# The following way of writing the cache mishandles newlines in values,
+# but we know of no workaround that is simple, portable, and efficient.
+# So, don't put newlines in cache variables' values.
+# Ultrix sh set writes to stderr and can't be redirected directly,
+# and sets the high bit in the cache file unless we assign to the vars.
+(set) 2>&1 |
+ case `(ac_space=' '; set) 2>&1` in
+ *ac_space=\ *)
+ # `set' does not quote correctly, so add quotes (double-quote substitution
+ # turns \\\\ into \\, and sed turns \\ into \).
+ sed -n \
+ -e "s/'/'\\\\''/g" \
+ -e "s/^\\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\\)=\\(.*\\)/\\1=\${\\1='\\2'}/p"
+ ;;
+ *)
+ # `set' quotes correctly as required by POSIX, so do not add quotes.
+ sed -n -e 's/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=${\1=\2}/p'
+ ;;
+ esac >> confcache
+if cmp -s $cache_file confcache; then
+ :
+else
+ if test -w $cache_file; then
+ echo "updating cache $cache_file"
+ cat confcache > $cache_file
+ else
+ echo "not updating unwritable cache $cache_file"
+ fi
+fi
+rm -f confcache
+
+trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15
+
+test "x$prefix" = xNONE && prefix=$ac_default_prefix
+# Let make expand exec_prefix.
+test "x$exec_prefix" = xNONE && exec_prefix='${prefix}'
+
+# Any assignment to VPATH causes Sun make to only execute
+# the first set of double-colon rules, so remove it if not needed.
+# If there is a colon in the path, we need to keep it.
+if test "x$srcdir" = x.; then
+ ac_vpsub='/^[ ]*VPATH[ ]*=[^:]*$/d'
+fi
+
+trap 'rm -f $CONFIG_STATUS conftest*; exit 1' 1 2 15
+
+DEFS=-DHAVE_CONFIG_H
+
+# Without the "./", some shells look in PATH for config.status.
+: ${CONFIG_STATUS=./config.status}
+
+echo creating $CONFIG_STATUS
+rm -f $CONFIG_STATUS
+cat > $CONFIG_STATUS <<EOF
+#! /bin/sh
+# Generated automatically by configure.
+# Run this file to recreate the current configuration.
+# This directory was configured as follows,
+# on host `(hostname || uname -n) 2>/dev/null | sed 1q`:
+#
+# $0 $ac_configure_args
+#
+# Compiler output produced by configure, useful for debugging
+# configure, is in ./config.log if it exists.
+
+ac_cs_usage="Usage: $CONFIG_STATUS [--recheck] [--version] [--help]"
+for ac_option
+do
+ case "\$ac_option" in
+ -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r)
+ echo "running \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion"
+ exec \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion ;;
+ -version | --version | --versio | --versi | --vers | --ver | --ve | --v)
+ echo "$CONFIG_STATUS generated by autoconf version 2.12"
+ exit 0 ;;
+ -help | --help | --hel | --he | --h)
+ echo "\$ac_cs_usage"; exit 0 ;;
+ *) echo "\$ac_cs_usage"; exit 1 ;;
+ esac
+done
+
+ac_given_srcdir=$srcdir
+ac_given_INSTALL="$INSTALL"
+
+trap 'rm -fr `echo "Makefile.conf include/version.h utils/alsa-lib.spec include/config.h" | sed "s/:[^ ]*//g"` conftest*; exit 1' 1 2 15
+EOF
+cat >> $CONFIG_STATUS <<EOF
+
+# Protect against being on the right side of a sed subst in config.status.
+sed 's/%@/@@/; s/@%/@@/; s/%g\$/@g/; /@g\$/s/[\\\\&%]/\\\\&/g;
+ s/@@/%@/; s/@@/@%/; s/@g\$/%g/' > conftest.subs <<\\CEOF
+$ac_vpsub
+$extrasub
+s%@CFLAGS@%$CFLAGS%g
+s%@CPPFLAGS@%$CPPFLAGS%g
+s%@CXXFLAGS@%$CXXFLAGS%g
+s%@DEFS@%$DEFS%g
+s%@LDFLAGS@%$LDFLAGS%g
+s%@LIBS@%$LIBS%g
+s%@exec_prefix@%$exec_prefix%g
+s%@prefix@%$prefix%g
+s%@program_transform_name@%$program_transform_name%g
+s%@bindir@%$bindir%g
+s%@sbindir@%$sbindir%g
+s%@libexecdir@%$libexecdir%g
+s%@datadir@%$datadir%g
+s%@sysconfdir@%$sysconfdir%g
+s%@sharedstatedir@%$sharedstatedir%g
+s%@localstatedir@%$localstatedir%g
+s%@libdir@%$libdir%g
+s%@includedir@%$includedir%g
+s%@oldincludedir@%$oldincludedir%g
+s%@infodir@%$infodir%g
+s%@mandir@%$mandir%g
+s%@CC@%$CC%g
+s%@RANLIB@%$RANLIB%g
+s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g
+s%@INSTALL_DATA@%$INSTALL_DATA%g
+s%@LN_S@%$LN_S%g
+s%@CPP@%$CPP%g
+s%@SND_LIB_VERSION@%$SND_LIB_VERSION%g
+s%@SND_LIB_MAJOR@%$SND_LIB_MAJOR%g
+s%@SND_LIB_MINOR@%$SND_LIB_MINOR%g
+s%@SND_LIB_SUBMINOR@%$SND_LIB_SUBMINOR%g
+
+CEOF
+EOF
+
+cat >> $CONFIG_STATUS <<\EOF
+
+# Split the substitutions into bite-sized pieces for seds with
+# small command number limits, like on Digital OSF/1 and HP-UX.
+ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script.
+ac_file=1 # Number of current file.
+ac_beg=1 # First line for current file.
+ac_end=$ac_max_sed_cmds # Line after last line for current file.
+ac_more_lines=:
+ac_sed_cmds=""
+while $ac_more_lines; do
+ if test $ac_beg -gt 1; then
+ sed "1,${ac_beg}d; ${ac_end}q" conftest.subs > conftest.s$ac_file
+ else
+ sed "${ac_end}q" conftest.subs > conftest.s$ac_file
+ fi
+ if test ! -s conftest.s$ac_file; then
+ ac_more_lines=false
+ rm -f conftest.s$ac_file
+ else
+ if test -z "$ac_sed_cmds"; then
+ ac_sed_cmds="sed -f conftest.s$ac_file"
+ else
+ ac_sed_cmds="$ac_sed_cmds | sed -f conftest.s$ac_file"
+ fi
+ ac_file=`expr $ac_file + 1`
+ ac_beg=$ac_end
+ ac_end=`expr $ac_end + $ac_max_sed_cmds`
+ fi
+done
+if test -z "$ac_sed_cmds"; then
+ ac_sed_cmds=cat
+fi
+EOF
+
+cat >> $CONFIG_STATUS <<EOF
+
+CONFIG_FILES=\${CONFIG_FILES-"Makefile.conf include/version.h utils/alsa-lib.spec"}
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+for ac_file in .. $CONFIG_FILES; do if test "x$ac_file" != x..; then
+ # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+ case "$ac_file" in
+ *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+ ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+ *) ac_file_in="${ac_file}.in" ;;
+ esac
+
+ # Adjust a relative srcdir, top_srcdir, and INSTALL for subdirectories.
+
+ # Remove last slash and all that follows it. Not all systems have dirname.
+ ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+ if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+ # The file is in a subdirectory.
+ test ! -d "$ac_dir" && mkdir "$ac_dir"
+ ac_dir_suffix="/`echo $ac_dir|sed 's%^\./%%'`"
+ # A "../" for each directory in $ac_dir_suffix.
+ ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'`
+ else
+ ac_dir_suffix= ac_dots=
+ fi
+
+ case "$ac_given_srcdir" in
+ .) srcdir=.
+ if test -z "$ac_dots"; then top_srcdir=.
+ else top_srcdir=`echo $ac_dots|sed 's%/$%%'`; fi ;;
+ /*) srcdir="$ac_given_srcdir$ac_dir_suffix"; top_srcdir="$ac_given_srcdir" ;;
+ *) # Relative path.
+ srcdir="$ac_dots$ac_given_srcdir$ac_dir_suffix"
+ top_srcdir="$ac_dots$ac_given_srcdir" ;;
+ esac
+
+ case "$ac_given_INSTALL" in
+ [/$]*) INSTALL="$ac_given_INSTALL" ;;
+ *) INSTALL="$ac_dots$ac_given_INSTALL" ;;
+ esac
+
+ echo creating "$ac_file"
+ rm -f "$ac_file"
+ configure_input="Generated automatically from `echo $ac_file_in|sed 's%.*/%%'` by configure."
+ case "$ac_file" in
+ *Makefile*) ac_comsub="1i\\
+# $configure_input" ;;
+ *) ac_comsub= ;;
+ esac
+
+ ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+ sed -e "$ac_comsub
+s%@configure_input@%$configure_input%g
+s%@srcdir@%$srcdir%g
+s%@top_srcdir@%$top_srcdir%g
+s%@INSTALL@%$INSTALL%g
+" $ac_file_inputs | (eval "$ac_sed_cmds") > $ac_file
+fi; done
+rm -f conftest.s*
+
+# These sed commands are passed to sed as "A NAME B NAME C VALUE D", where
+# NAME is the cpp macro being defined and VALUE is the value it is being given.
+#
+# ac_d sets the value in "#define NAME VALUE" lines.
+ac_dA='s%^\([ ]*\)#\([ ]*define[ ][ ]*\)'
+ac_dB='\([ ][ ]*\)[^ ]*%\1#\2'
+ac_dC='\3'
+ac_dD='%g'
+# ac_u turns "#undef NAME" with trailing blanks into "#define NAME VALUE".
+ac_uA='s%^\([ ]*\)#\([ ]*\)undef\([ ][ ]*\)'
+ac_uB='\([ ]\)%\1#\2define\3'
+ac_uC=' '
+ac_uD='\4%g'
+# ac_e turns "#undef NAME" without trailing blanks into "#define NAME VALUE".
+ac_eA='s%^\([ ]*\)#\([ ]*\)undef\([ ][ ]*\)'
+ac_eB='$%\1#\2define\3'
+ac_eC=' '
+ac_eD='%g'
+
+if test "${CONFIG_HEADERS+set}" != set; then
+EOF
+cat >> $CONFIG_STATUS <<EOF
+ CONFIG_HEADERS="include/config.h"
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+fi
+for ac_file in .. $CONFIG_HEADERS; do if test "x$ac_file" != x..; then
+ # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in".
+ case "$ac_file" in
+ *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'`
+ ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;;
+ *) ac_file_in="${ac_file}.in" ;;
+ esac
+
+ echo creating $ac_file
+
+ rm -f conftest.frag conftest.in conftest.out
+ ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"`
+ cat $ac_file_inputs > conftest.in
+
+EOF
+
+# Transform confdefs.h into a sed script conftest.vals that substitutes
+# the proper values into config.h.in to produce config.h. And first:
+# Protect against being on the right side of a sed subst in config.status.
+# Protect against being in an unquoted here document in config.status.
+rm -f conftest.vals
+cat > conftest.hdr <<\EOF
+s/[\\&%]/\\&/g
+s%[\\$`]%\\&%g
+s%#define \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%${ac_dA}\1${ac_dB}\1${ac_dC}\2${ac_dD}%gp
+s%ac_d%ac_u%gp
+s%ac_u%ac_e%gp
+EOF
+sed -n -f conftest.hdr confdefs.h > conftest.vals
+rm -f conftest.hdr
+
+# This sed command replaces #undef with comments. This is necessary, for
+# example, in the case of _POSIX_SOURCE, which is predefined and required
+# on some systems where configure will not decide to define it.
+cat >> conftest.vals <<\EOF
+s%^[ ]*#[ ]*undef[ ][ ]*[a-zA-Z_][a-zA-Z_0-9]*%/* & */%
+EOF
+
+# Break up conftest.vals because some shells have a limit on
+# the size of here documents, and old seds have small limits too.
+
+rm -f conftest.tail
+while :
+do
+ ac_lines=`grep -c . conftest.vals`
+ # grep -c gives empty output for an empty file on some AIX systems.
+ if test -z "$ac_lines" || test "$ac_lines" -eq 0; then break; fi
+ # Write a limited-size here document to conftest.frag.
+ echo ' cat > conftest.frag <<CEOF' >> $CONFIG_STATUS
+ sed ${ac_max_here_lines}q conftest.vals >> $CONFIG_STATUS
+ echo 'CEOF
+ sed -f conftest.frag conftest.in > conftest.out
+ rm -f conftest.in
+ mv conftest.out conftest.in
+' >> $CONFIG_STATUS
+ sed 1,${ac_max_here_lines}d conftest.vals > conftest.tail
+ rm -f conftest.vals
+ mv conftest.tail conftest.vals
+done
+rm -f conftest.vals
+
+cat >> $CONFIG_STATUS <<\EOF
+ rm -f conftest.frag conftest.h
+ echo "/* $ac_file. Generated automatically by configure. */" > conftest.h
+ cat conftest.in >> conftest.h
+ rm -f conftest.in
+ if cmp -s $ac_file conftest.h 2>/dev/null; then
+ echo "$ac_file is unchanged"
+ rm -f conftest.h
+ else
+ # Remove last slash and all that follows it. Not all systems have dirname.
+ ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'`
+ if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then
+ # The file is in a subdirectory.
+ test ! -d "$ac_dir" && mkdir "$ac_dir"
+ fi
+ rm -f $ac_file
+ mv conftest.h $ac_file
+ fi
+fi; done
+
+EOF
+cat >> $CONFIG_STATUS <<EOF
+
+EOF
+cat >> $CONFIG_STATUS <<\EOF
+
+exit 0
+EOF
+chmod +x $CONFIG_STATUS
+rm -fr confdefs* $ac_clean_files
+test "$no_create" = yes || ${CONFIG_SHELL-/bin/sh} $CONFIG_STATUS || exit 1
+
--- /dev/null
+dnl Process this file with autoconf to produce a configure script.
+
+AC_INIT(Makefile.conf.in)
+AC_PREFIX_DEFAULT(/usr)
+
+dnl Checks for programs.
+AC_PROG_CC
+AC_PROG_RANLIB
+AC_PROG_INSTALL
+AC_PROG_LN_S
+
+dnl Checks for header files.
+AC_HEADER_STDC
+AC_CONFIG_HEADER(include/config.h)
+AC_CHECK_HEADERS(linux/sound.h)
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_C_INLINE
+AC_C_BIGENDIAN
+AC_HEADER_TIME
+
+dnl Checks for library functions.
+AC_PROG_GCC_TRADITIONAL
+
+dnl Check for ALSA driver package.
+myprefix=$prefix
+if test "$myprefix" = "NONE"; then
+ myprefix=$ac_default_prefix
+fi
+CFLAGS="-I$myprefix/include"
+#echo "CFLAGS=$CFLAGS"
+AC_MSG_CHECKING(for alsa-driver package)
+AC_TRY_RUN([
+#include <linux/sound.h>
+void main(void)
+{
+#ifndef SND_PROTOCOL_VERSION
+ exit(1);
+#else
+ exit(0);
+#endif
+}
+],
+ AC_MSG_RESULT("present"),
+ AC_MSG_RESULT("not found"); echo "Fatal error: Install alsa-driver package at first..."; exit 1;,
+ AC_MSG_RESULT("not supported"); echo "Fatal error: Cross-compiling isn't supported..."; exit 1;,
+)
+
+dnl Check for version...
+AC_MSG_CHECKING(for library version)
+SND_LIB_VERSION=`cat $srcdir/version`
+AC_DEFINE_UNQUOTED(SND_LIB_VERSION, "$SND_LIB_VERSION")
+AC_SUBST(SND_LIB_VERSION)
+SND_LIB_MAJOR=`echo $SND_LIB_VERSION | cut -d . -f 1`
+AC_SUBST(SND_LIB_MAJOR)
+SND_LIB_MINOR=`echo $SND_LIB_VERSION | cut -d . -f 2`
+AC_SUBST(SND_LIB_MINOR)
+SND_LIB_SUBMINOR=`echo $SND_LIB_VERSION | cut -d . -f 3`
+AC_SUBST(SND_LIB_SUBMINOR)
+AC_MSG_RESULT($SND_LIB_VERSION)
+
+AC_OUTPUT(Makefile.conf include/version.h utils/alsa-lib.spec)
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../Makefile.conf
+
+TARGETS=soundapi.txt \
+ soundapi.html
+
+all: $(TARGETS)
+
+soundapi.txt: soundapi.sgml
+ sgml2txt soundapi.sgml
+
+soundapi.html: soundapi.sgml
+ sgml2html soundapi.sgml
+
+clean:
+ rm -f core .depend *.orig *~
--- /dev/null
+
+ ALSA library plan
+ =================
+
+=====
+ST: Status of coding
+NT: Note
+RP: Responsible person
+
+This file is maintained by Jaroslav Kysela <perex@jcu.cz>.
+=====
+
+ Library code
+ ============
+
+1: Control interface routines
+ ST: Low-Level code done
+ RP: Jaroslav Kysela <perex@jcu.cz>
+1.1: Network layer
+2: MIXER routines
+ ST: Low-Level code done
+ RP: Jaroslav Kysela <perex@jcu.cz>
+2.1: Network layer
+3: PCM routines
+ ST: Low-Level code done
+ RP: Jaroslav Kysela <perex@jcu.cz>
+3.1: Network layer + mixing routines to allow playback more than one input
+ to one exclusive device
+3.2: Player routines for digital data (.wav,.snd,.mp3 etc...) (???)
+4: Instrument loading routines
+4.1: Network layer
+4.2: Instrument format interface
+4.2.1: GF1 patches (.pat)
+4.2.2: AMD FFFF
+4.2.3: SoundFont (for SoundBlaster)
+4.2.4: FM/OPL3 instrument formats
+5: Raw FM/OPL3 interface
+6: SYNTH interface
+6.1: Network layer
+6.2: player for .MOD,.S3M etc. (???)
+7: Instrument server interface
+8: Instrument configuration routines for MIDI
+9: raw MIDI interface
+9.1: Network layer
+10: sequenced MIDI interface
+10.1: Network layer
+10.2: player for MIDI files
--- /dev/null
+<HTML>
+<HEAD>
+<TITLE>Advanced Linux Sound Architecture - Library API: Introduction</TITLE>
+</HEAD>
+<BODY>
+Previous
+<A HREF="soundapi-2.html">Next</A>
+<A HREF="soundapi.html#toc1">Table of Contents</A>
+<HR>
+<H2><A NAME="s1">1. Introduction</A></H2>
+
+<P>The Advanced Linux Sound Architecture comes with a kernel API & library API.
+This document describes the library API and how it interfaces with the kernel
+API. The kernal API will probably never be documented in standalone form.</P>
+<P>Application programmers should use the library API rather than kernel API.
+The Library offers 100% of the functionally of the kernel API, but add next
+major improvements in usability, making the application code simpler and
+better looking. In addition, some of the some fixes/compatibility code in,
+may be placed in the library code instead of the kernel driver.</P>
+<P>For a complete list of all variables and functions in the API you should look
+at the following header files:
+<OL>
+<LI>/usr/include/sys/soundlib.h</LI>
+<LI>/usr/include/linux/sound.h</LI>
+<LI>/usr/include/linux/sounddetect.h</LI>
+</OL>
+</P>
+
+<HR>
+Previous
+<A HREF="soundapi-2.html">Next</A>
+<A HREF="soundapi.html#toc1">Table of Contents</A>
+</BODY>
+</HTML>
--- /dev/null
+<HTML>
+<HEAD>
+<TITLE>Advanced Linux Sound Architecture - Library API: Error Codes</TITLE>
+</HEAD>
+<BODY>
+<A HREF="soundapi-1.html">Previous</A>
+<A HREF="soundapi-3.html">Next</A>
+<A HREF="soundapi.html#toc2">Table of Contents</A>
+<HR>
+<H2><A NAME="s2">2. Error Codes</A></H2>
+
+<P>All functions return int (or some sort of signed value). If this value
+is negative it represents an error code. Codes up to SND_ERROR_BEGIN (500000)
+represents standard system errors. Codes equal or greather than this value
+represents sound library API errors. All error codes begin with the prefix
+<I>SND_ERROR_</I>.</P>
+
+<H2><A NAME="ss2.1">2.1 Error Codes in Detail</A></H2>
+
+<P>
+<DL>
+<DT><B>SND_ERROR_UNCOMPATIBLE_VERSION (500000)</B><DD><P>This error is caused if the driver uses an incompatible kernel API for this
+interface and hence the library doesn't know how this API can be used.</P>
+</DL>
+</P>
+
+
+<H2><A NAME="ss2.2">2.2 Functions</A></H2>
+
+
+
+<H3>const char *snd_strerror( int errnum ) </H3>
+
+<P>This functions converts error code to a string. Its functionality is the same
+as the <I>strerror</I> function from the standard C library, but this
+function returns correct strings for sound error codes, too.</P>
+
+
+<HR>
+<A HREF="soundapi-1.html">Previous</A>
+<A HREF="soundapi-3.html">Next</A>
+<A HREF="soundapi.html#toc2">Table of Contents</A>
+</BODY>
+</HTML>
--- /dev/null
+<HTML>
+<HEAD>
+<TITLE>Advanced Linux Sound Architecture - Library API: Control Interface</TITLE>
+</HEAD>
+<BODY>
+<A HREF="soundapi-2.html">Previous</A>
+<A HREF="soundapi-4.html">Next</A>
+<A HREF="soundapi.html#toc3">Table of Contents</A>
+<HR>
+<H2><A NAME="s3">3. Control Interface</A></H2>
+
+<P>The control interfaces gives application various information about the
+currently installed sound driver in the system. The interface should be used
+to detect if another sound interface is present for selected soundcard or,
+for example, to create a list of devices (MIXER, PCM etc) from which
+the user can select.</P>
+
+<H2><A NAME="ss3.1">3.1 Low-Level Layer</A></H2>
+
+<H3>int snd_cards( void ) </H3>
+
+<P>Returns the number of soundcards present in the system, if any. Otherwise
+it returns a negative value, which maps to an error code. This function
+will return 0 if no soundcards are detected.</P>
+
+<H3>unsigned int snd_cards_mask( void ) </H3>
+
+<P>Returns the bitmap of soundcards present in the system, if any. Otherwise
+it returns a negative value, which maps to an error code. This function
+will return 0 if no soundcards are detected. First soundcard is represented
+with bit 0.</P>
+
+<H3>int snd_ctl_open( void **handle, int card ) </H3>
+
+<P>Creates a new handle and opens communication with the kernel sound
+control interface for soundcard number <I>card</I> (0-N). The function
+also checks if protocol is compatible, so as to prevent the use of old
+programs with a new kernel API. Function returns zero if successful,
+otherwise an error code is returned.</P>
+
+<H3>int snd_ctl_close( void *handle ) </H3>
+
+<P>Function frees all resources allocated with control handle and
+closes the kernel sound control interface. Function returns zero if
+successful, otherwise it returns an error code.</P>
+
+<H3>int snd_ctl_file_descriptor( void *handle ) </H3>
+
+<P>Function returns file descriptor for the kernel sound control interface.
+This function should be used in very special cases. Function returns
+a negative error code if some error was encountered.</P>
+
+<H3>int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info *info ) </H3>
+
+<P>Fills the info structure with data about the sound hardware referenced
+by handle. Function returns zero if successful, otherwise it returns
+an error code.
+<HR>
+<PRE>
+ #define SND_CTL_GCAPS_MIDI 0x0000001 /* driver has MIDI interface */
+
+ #define SND_CTL_LCAPS_SYNTH 0x0000001 /* soundcard has synthesizer */
+ #define SND_CTL_LCAPS_RAWFM 0x0000002 /* soundcard has RAW FM/OPL3 */
+
+ struct snd_ctl_hw_info {
+ unsigned int type; /* type of card - see SND_CARD_TYPE_XXXX */
+ unsigned int gcaps; /* see SND_CTL_GCAPS_XXXX */
+ unsigned int lcaps; /* see SND_CTL_LCAPS_XXXX */
+ unsigned int pcmdevs; /* count of PCM devices (0 to N) */
+ unsigned int mixerdevs; /* count of MIXER devices (0 to N) */
+ unsigned int mididevs; /* count of raw MIDI devices (0 to N) */
+ char id[8]; /* ID of card (user selectable) */
+ char name[80]; /* name/info text about soundcard */
+ unsigned char reserved[128]; /* reserved for future use */
+ };
+
+</PRE>
+<HR>
+</P>
+
+<H3>int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t *info ) </H3>
+
+<P>Fills the *info structure with data about the PCM device. Function returns
+zero if successful, otherwise it returns an error code. Details about
+the snd_pcm_info_t structure are in the <B>Digital Audio (PCM) Interface</B>
+section. The argument <I>dev</I> selects the device number for the
+soundcard referenced by *handle. Its range is 0 to N where N is
+<I>struct snd_ctl_hw_info -> pcmdevs - 1</I>. This function will work if
+the selected PCM device is busy, too. It should be used to collect
+information about PCM devices without exclusive lock.</P>
+
+<H3>int snd_ctl_pcm_playback_info( void *handle, int dev, snd_pcm_playback_info_t *info ) </H3>
+
+<P>Fills the *info structure with data about the PCM device and playback direction.
+Function returns zero if successful, otherwise it returns an error code.
+Details about the snd_pcm_playback_info_t structure are in the
+<B>Digital Audio (PCM) Interface</B> section. The argument <I>dev</I>
+selects the device number for the soundcard referenced by *handle. Its
+range is 0 to N where N is <I>struct snd_ctl_hw_info -> pcmdevs - 1</I>.
+This function will work if the selected PCM device is busy, too. It should
+be used to collect information about PCM devices without exclusive lock.</P>
+
+<H3>int snd_ctl_pcm_record_info( void *handle, int dev, snd_pcm_record_info_t *info ) </H3>
+
+<P>Fills the *info structure with data about the PCM device and record direction.
+Function returns zero if successful, otherwise it returns an error code.
+Details about the snd_pcm_record_info_t structure are in the
+<B>Digital Audio (PCM) Interface</B> section. The argument <I>dev</I>
+selects the device number for the soundcard referenced by *handle. Its
+range is 0 to N where N is <I>struct snd_ctl_hw_info -> pcmdevs - 1</I>.
+This function will work if the selected PCM device is busy, too. It should
+be used to collect information about PCM devices without exclusive lock.</P>
+
+<H3>int snd_ctl_mixer_info( void *handle, int dev, snd_mixer_info_t *info ) </H3>
+
+<P>Fills the *info structure with data about the mixer device. Returns zero
+if successful, otherwise it returns an error code. Details about the
+snd_mixer_info_t structure are in the <B>Mixer Interface</B> section.
+The argument <I>dev</I> specifies the device number for the appropriate
+soundcard. Its range is 0 to N where N found from
+<I>struct snd_ctl_hw_info -> mixerdevs - 1</I>.
+It should be used to collect information about mixer devices.</P>
+
+
+<H2><A NAME="ss3.2">3.2 Examples</A></H2>
+
+<P>The following example shows how all PCM devices can be detected for the first
+soundcard (#0) in the system.</P>
+<P>
+<BLOCKQUOTE><CODE>
+<HR>
+<PRE>
+int card = 0, err;
+void *handle;
+stuct snd_ctl_hw_info info;
+
+if ( (err = snd_ctl_open( &handle, card )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+}
+if ( (err = snd_ctl_hw_info( handle, &info )) < 0 ) {
+ fprintf( stderr, "hw info failed: %s\n", snd_strerror( err ) );
+ snd_ctl_close( handle );
+ return;
+}
+printf( "Installed PCM devices for card #i: %i\n", card + 1, info.pcmdevs );
+snd_ctl_close( handle );
+</PRE>
+<HR>
+</CODE></BLOCKQUOTE>
+</P>
+
+
+<HR>
+<A HREF="soundapi-2.html">Previous</A>
+<A HREF="soundapi-4.html">Next</A>
+<A HREF="soundapi.html#toc3">Table of Contents</A>
+</BODY>
+</HTML>
--- /dev/null
+<HTML>
+<HEAD>
+<TITLE>Advanced Linux Sound Architecture - Library API: Mixer Interface</TITLE>
+</HEAD>
+<BODY>
+<A HREF="soundapi-3.html">Previous</A>
+<A HREF="soundapi-5.html">Next</A>
+<A HREF="soundapi.html#toc4">Table of Contents</A>
+<HR>
+<H2><A NAME="s4">4. Mixer Interface</A></H2>
+
+<P>The Mixer Interface allows applications to change the volume level of
+a soundcard's input/output channels in both the linear range (0-100)
+and in decibels. It also supports features like hardware mute, input
+sound source, etc.</P>
+
+<H2><A NAME="ss4.1">4.1 Low-Level Layer</A></H2>
+
+<P>Mixer devices aren't opened exclusively. This allows applications to
+open a device multiple times with one or more processes.</P>
+
+<H3>int snd_mixer_open( void **handle, int card, int device ) </H3>
+
+<P>Creates new handle and opens a connection to the kernel sound
+mixer interface for soundcard number <I>card</I> (0-N) and mixer
+device number <I>device</I>. Also checks if protocol is
+compatible to prevent use of old programs with new kernel API. Function
+returns zero if successful, otherwise it returns an error code.</P>
+
+<H3>int snd_mixer_close( void *handle ) </H3>
+
+<P>Frees all resources allocated to the mixer handle and
+closes its connection to the kernel sound mixer interface. Function
+returns zero if successful, otherwise it returns an error code.</P>
+
+<H3>int snd_mixer_file_descriptor( void *handle ) </H3>
+
+<P>Returns the file descriptor for the connection to the kernel sound
+mixer interface. This function should be used only in very
+special cases. Function returns a negative error code if an
+error was encountered. </P>
+<P>The file descriptor should be used for the <I>select</I> synchronous
+multiplexer function for deterimeing read direction. Applications should
+call <I>snd_mixer_read</I> function if some data is waiting to be read.
+It is recomended that you do this, since it leaves place for this function
+to handle some new kernel API specifications.</P>
+
+<H3>int snd_mixer_channels( void *handle ) </H3>
+
+<P>Returns the count of mixer channels for appropriate mixer device, otherwise
+the return value is negative, and signifies an error code. Never returns
+zero.</P>
+
+<H3>int snd_mixer_info( void *handle, snd_mixer_info_t *info ) </H3>
+
+<P>Fills the *info structure with information about the mixer associated with
+*handle. Returns zero if successful, otherwise it returns an error code.
+<HR>
+<PRE>
+ #define SND_MIXER_INFO_CAP_EXCL_RECORD 0x00000001
+
+ struct snd_mixer_info {
+ unsigned int type; /* type of soundcard - SND_CARD_TYPE_XXXX */
+ unsigned int channels; /* count of mixer devices */
+ unsigned int caps; /* some flags about this device (SND_MIXER_INFO_CAP_XXXX) */
+ unsigned char id[32]; /* ID of this mixer */
+ unsigned char name[80]; /* name of this device */
+ char reserved[ 32 ]; /* reserved for future use */
+ };
+
+</PRE>
+<HR>
+</P>
+
+<H3>int snd_mixer_channel( void *handle, const char *channel_id ) </H3>
+
+<P>Returns the channel number (index) associated with channel_id (channel name),
+or returns an error code.
+<HR>
+<PRE>
+ #define SND_MIXER_ID_MASTER "Master"
+ #define SND_MIXER_ID_BASS "Bass"
+ #define SND_MIXER_ID_TREBLE "Treble"
+ #define SND_MIXER_ID_SYNTHESIZER "Synth"
+ #define SND_MIXER_ID_SYNTHESIZER1 "Synth 1"
+ #define SND_MIXER_ID_FM "FM"
+ #define SND_MIXER_ID_EFFECT "Effect"
+ #define SND_MIXER_ID_PCM "PCM"
+ #define SND_MIXER_ID_PCM1 "PCM 1"
+ #define SND_MIXER_ID_LINE "Line-In"
+ #define SND_MIXER_ID_MIC "MIC"
+ #define SND_MIXER_ID_CD "CD"
+ #define SND_MIXER_ID_GAIN "Record-Gain"
+ #define SND_MIXER_ID_IGAIN "In-Gain"
+ #define SND_MIXER_ID_OGAIN "Out-Gain"
+ #define SND_MIXER_ID_LOOPBACK "Loopback"
+ #define SND_MIXER_ID_SPEAKER "PC Speaker"
+ #define SND_MIXER_ID_AUXA "Aux A"
+ #define SND_MIXER_ID_AUXB "Aux B"
+ #define SND_MIXER_ID_AUXC "Aux C"
+
+</PRE>
+<HR>
+ </P>
+
+<H3>int snd_mixer_exact_mode( void *handle, int enable ) </H3>
+
+<P>Turns on or off (by default) exact mode. This mode allows to application
+set/get volume values in exact range which uses hardware. In non-exact
+mode is range always from 0 to 100 and conversion to hardware range does
+driver. Function returns zero if successful, otherwise it returns an error
+code.</P>
+
+<H3>int snd_mixer_channel_info( void *handle, int channel, snd_mixer_channel_info_t *info ) </H3>
+
+<P>Fills the *info structure. The argument <I>channel</I> specifies channel
+(0 to N) for which is the info requested. Function returns zero if
+successful, otherwise it returns an error code.
+<HR>
+<PRE>
+ #define SND_MIXER_CINFO_CAP_RECORD 0x00000001
+ #define SND_MIXER_CINFO_CAP_STEREO 0x00000002
+ #define SND_MIXER_CINFO_CAP_MUTE 0x00000004
+ #define SND_MIXER_CINFO_CAP_HWMUTE 0x00000008 /* channel supports hardware mute */
+ #define SND_MIXER_CINFO_CAP_DIGITAL 0x00000010 /* channel does digital (not analog) mixing */
+ #define SND_MIXER_CINOF_CAP_INPUT 0x00000020 /* input channel */
+
+ struct snd_mixer_channel_info {
+ unsigned int channel; /* channel # (filled by application) */
+ unsigned int parent; /* parent channel # or SND_MIXER_PARENT */
+ unsigned char name[12]; /* name of this device */
+ unsigned int caps; /* some flags about this device (SND_MIXER_CINFO_XXXX) */
+ int min; /* min. value when exact mode (or always 0) */
+ int max; /* max. value when exact mode (or always 100) */
+ int min_dB; /* minimum decibel value (*100) */
+ int max_dB; /* maximum decibel value (*100) */
+ int step_dB; /* step decibel value (*100) */
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+</P>
+
+<H3>int snd_mixer_channel_read( void *handle, int channel, snd_mixer_channel_t *data ) </H3>
+
+<P>Fills the *data structure. The argument <I>channel</I> specifies
+the channel (0 to N) for which is data requested. Function returns
+zero if successful, otherwise it returns an error code.
+<HR>
+<PRE>
+ #define SND_MIXER_FLG_RECORD 0x00000001 /* channel record source flag */
+ #define SND_MIXER_FLG_MUTE_LEFT 0x00010000
+ #define SND_MIXER_FLG_MUTE_RIGHT 0x00020000
+ #define SND_MIXER_FLG_MUTE 0x00030000
+ #define SND_MIXER_FLG_DECIBEL 0x40000000
+ #define SND_MIXER_FLG_FORCE 0x80000000
+
+ struct snd_mixer_channel {
+ unsigned int channel; /* channel # (filled by application) */
+ unsigned int flags; /* some flags to read/write (SND_MIXER_FLG_XXXX) */
+ int left; /* min - max when exact mode (or 0 - 100) */
+ int right; /* min - max when exact mode (or 0 - 100) */
+ int left_dB; /* dB * 100 */
+ int right_dB; /* dB * 100 */
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+</P>
+<P>
+<DL>
+<DT><B>SND_MIXER_FLG_RECORD</B><DD><P>Record source flag.</P>
+<DT><B>SND_MIXER_FLG_DECIBEL</B><DD><P>If this bit is set, driver set volume from dB variables <I>left_dB</I>
+and <I>right_dB</I>.</P>
+<DT><B>SND_MIXER_FLG_FORCE</B><DD><P>Force set - this bit shouldn't be used from user space. Reserved for
+kernel.</P>
+</DL>
+</P>
+
+<H3>int snd_mixer_channel_write( void *handle, int channel, snd_mixer_channel_t *data ) </H3>
+
+<P>Writes the *data structure to kernel. The <I>channel</I> argument
+specifies the channel (0 to N) for which is data is to be applied.
+Function returns zero if successful, otherwise it returns an error code.
+This functions is the opposite of <I>snd_mixer_channel_read</I>.</P>
+
+<H3>int snd_mixer_special_read( void *handle, snd_mixer_special_t *special ) </H3>
+
+<P>Not documented...</P>
+
+<H3>int snd_mixer_special_write( void *handle, snd_mixer_special_t *special ) </H3>
+
+<P>Not documented...</P>
+
+<H3>int snd_mixer_read( void *handle, snd_mixer_callbacks_t *callbacks ) </H3>
+
+<P>This function reads and parses data from driver. Parsed actions are returned
+back to the application using the <I>callbacks</I> structure. Applications
+should not parse data from the driver in standard cases. This function
+returns immediately after all data is read from driver. Does not
+block process.
+<HR>
+<PRE>
+ typedef struct snd_mixer_callbacks {
+ void *private_data; /* should be used by application */
+ void (*channel_was_changed)( void *private_data, int channel );
+ void *reserved[15]; /* reserved for future use - must be NULL!!! */
+ } snd_mixer_callbacks_t;
+
+</PRE>
+<HR>
+</P>
+
+
+<H2><A NAME="ss4.2">4.2 Examples</A></H2>
+
+<P>The following example shows installed mixer channels for soundcard #0 and
+mixer device #0 in the system, and also sets the master volume (if present)
+to 50.</P>
+<P>
+<BLOCKQUOTE><CODE>
+<HR>
+<PRE>
+int card = 0, device = 0, err;
+void *handle;
+snd_mixer_info_t info;
+snd_mixer_channel_t channel;
+
+if ( (err = snd_mixer_open( &handle, card, device )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+}
+if ( (err = snd_mixer_info( handle, &info )) < 0 ) {
+ fprintf( stderr, "info failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+}
+printf( "Installed MIXER channels for card #i and device %i: %i\n",
+ card + 1, device, info.channels );
+master = snd_mixer_channel( handle, SND_MIXER_ID_MASTER );
+if ( master >= 0 ) {
+ if ( (err = snd_mixer_read( handle, master, &channel )) < 0 ) {
+ fprintf( stderr, "master read failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+ channel -> left = channel -> right = 50;
+ if ( (err = snd_mixer_write( handle, master, &channel )) < 0 ) {
+ fprintf( stderr, "master write failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+}
+snd_mixer_close( handle );
+</PRE>
+<HR>
+</CODE></BLOCKQUOTE>
+</P>
+
+
+<HR>
+<A HREF="soundapi-3.html">Previous</A>
+<A HREF="soundapi-5.html">Next</A>
+<A HREF="soundapi.html#toc4">Table of Contents</A>
+</BODY>
+</HTML>
--- /dev/null
+<HTML>
+<HEAD>
+<TITLE>Advanced Linux Sound Architecture - Library API: Digital Audio (PCM) Interface</TITLE>
+</HEAD>
+<BODY>
+<A HREF="soundapi-4.html">Previous</A>
+Next
+<A HREF="soundapi.html#toc5">Table of Contents</A>
+<HR>
+<H2><A NAME="s5">5. Digital Audio (PCM) Interface</A></H2>
+
+<P>Digital audio is the most commonly used method of representing sound inside
+a computer. In this method sound is stored as a sequence of samples taken
+from the audio signal using constant time intervals. A sample represents
+volume of the signal at the moment when it was measured. In uncompressed
+digital audio each sample require one or more bytes of storage. The number of
+bytes required depends on number of channels (mono, stereo) and sample
+format (8 or 16 bits, mu-Law, etc.). The length of this interval determines
+the sampling rate. Commonly used sampling rates are between 8 kHz (telephone
+quality) and 48 kHz (DAT tapes).</P>
+<P>The physical devices used in digital audio are called the ADC (Analog to
+Digital Converter) and DAC (Digital to Analog Converter). A device containing
+both ADC and DAC is commonly known as a codec. The codec device used in
+a Sound Blaster cards is called a DSP which is somewhat misleading since DSP
+also stands for Digital Signal Processor (the SB DSP chip is very limited
+when compared to "true" DSP chips). </P>
+<P>Sampling parameters affect the quality of sound which can be reproduced from
+the recorded signal. The most fundamental parameter is sampling rate which
+limits the highest frequency than can be stored. It is well known (Nyquist's
+Sampling Theorem) that the highest frequency that can be stored in a sampled
+signal is at most 1/2 of the sampling frequency. For example, a 8 kHz sampling
+rate permits the recording of a signal in which the highest frequency is less
+than 4 kHz. Higher frequency signals must be filtered out before feeding them
+to DAC. </P>
+<P>Sample encoding limits the dynamic range of recorded signal (difference between
+the faintest and the loudest signal that can be recorded). In theory the
+maximum dynamic range of signal is number_of_bits * 6 dB . This means that
+8 bits sampling resolution gives dynamic range of 48 dB and 16 bit resolution
+gives 96 dB. </P>
+<P>Quality has price. The number of bytes required to store an audio sequence
+depends on sampling rate, number of channels and sampling resolution. For
+example just 8000 bytes of memory is required to store one second of sound
+using 8 kHz/8 bits/mono but 48 kHz/16bit/stereo takes 192 kilobytes. A 64 kbps
+ISDN channel is required to transfer a 8kHz/8bit/mono audio stream in real
+time, and about 1.5 Mbps is required for DAT quality (48kHz/16bit/stereo).
+On the other hand it is possible to store just 5.46 seconds of sound in
+a megabyte of memory when using 48kHz/16bit/stereo sampling. With
+8kHz/8bits/mono it is possible to store 131 seconds of sound using the same
+amount of memory. It is possible to reduce memory and communication costs by
+compressing the recorded signal but this is out of the scope of this document. </P>
+
+<H2><A NAME="ss5.1">5.1 Low-Level Layer</A></H2>
+
+<P>Audio devices are opened exclusively for a selected direction. This doesn't
+allow open from more than one processes for the same audio device in the
+same direction, but does allow one open call to each playback direction and
+second open call to record direction independently. Audio devices return
+EBUSY error to applications when other applications have already opened the
+requested direction.</P>
+<P>Low-Level layer supports these formats:
+<BLOCKQUOTE><CODE>
+<HR>
+<PRE>
+#define SND_PCM_SFMT_MU_LAW 0
+#define SND_PCM_SFMT_A_LAW 1
+#define SND_PCM_SFMT_IMA_ADPCM 2
+#define SND_PCM_SFMT_U8 3
+#define SND_PCM_SFMT_S16_LE 4
+#define SND_PCM_SFMT_S16_BE 5
+#define SND_PCM_SFMT_S8 6
+#define SND_PCM_SFMT_U16_LE 7
+#define SND_PCM_SFMT_U16_BE 8
+#define SND_PCM_SFMT_MPEG 9
+#define SND_PCM_SFMT_GSM 10
+
+#define SND_PCM_FMT_MU_LAW (1 << SND_PCM_SFMT_MU_LAW)
+#define SND_PCM_FMT_A_LAW (1 << SND_PCM_SFMT_A_LAW)
+#define SND_PCM_FMT_IMA_ADPCM (1 << SND_PCM_SFMT_IMA_ADPCM)
+#define SND_PCM_FMT_U8 (1 << SND_PCM_SFMT_U8)
+#define SND_PCM_FMT_S16_LE (1 << SND_PCM_SFMT_S16_LE)
+#define SND_PCM_FMT_S16_BE (1 << SND_PCM_SFMT_S16_BE)
+#define SND_PCM_FMT_S8 (1 << SND_PCM_SFMT_S8)
+#define SND_PCM_FMT_U16_LE (1 << SND_PCM_SFMT_U16_LE)
+#define SND_PCM_FMT_U16_BE (1 << SND_PCM_SFMT_U16_BE)
+#define SND_PCM_FMT_MPEG (1 << SND_PCM_SFMT_MPEG)
+#define SND_PCM_FMT_GSM (1 << SND_PCM_SFMT_GSM)
+</PRE>
+<HR>
+</CODE></BLOCKQUOTE>
+
+Constants with prefix <B>SND_PCM_FMT_</B> are used in info structures
+and constants with prefix <B>SND_PCM_SFMT_</B> are used in format structures.</P>
+
+<H3>int snd_pcm_open( void **handle, int card, int device, int mode ) </H3>
+
+<P>Creates a new handle and opens a connection to kernel sound
+audio interface for soundcard number <I>card</I> (0-N) and audio
+device number <I>device</I>. Function also checks if protocol is
+compatible to prevent use of old programs with a new kernel API. Function
+returns zero if successful,ful otherwise it returns an error code.
+Error code -EBUSY is returned when some process ownes the selected direction.</P>
+<P>Default format after opening is mono <I>mu-Law</I> at 8000Hz. This device
+can be used directly for playback of standard .au (Sparc) files.</P>
+<P>The following modes should be used for the <I>mode</I> argument:
+<HR>
+<PRE>
+ #define SND_PCM_OPEN_PLAYBACK (O_WRONLY)
+ #define SND_PCM_OPEN_RECORD (O_RDONLY)
+ #define SND_PCM_OPEN_DUPLEX (O_RDWR)
+
+</PRE>
+<HR>
+</P>
+
+<H3>int snd_pcm_close( void *handle ) </H3>
+
+<P>Frees all resources allocated with audio handle and
+closes the connection to the kernel sound audio interface. Function
+returns zero if successful, otherwise it returns an error code.</P>
+
+<H3>int snd_pcm_file_descriptor( void *handle ) </H3>
+
+<P>Returns the file descriptor of the connection to the kernel sound
+audio interface. Function returns an error code if an
+error was encountered. </P>
+<P>The file descriptor should be used for the <I>select</I> synchronous
+multiplexer function for setting the read direction. Application should
+call <I>snd_pcm_read</I> or <I>snd_pcm_write</I> functions if some
+data is waiting for reading or a write can be performed. Calling this
+function is highly recomended, as it leaves a place for the API to things
+like data conversions, if needed.</P>
+
+<H3>int snd_pcm_block_mode( void *handle, int enable ) </H3>
+
+<P>Sets up block (default) or nonblock mode for a handle. Block mode suspends
+execution of a program when <I>snd_pcm_read</I> or <I>snd_pcm_write</I>
+is called for the time which is needed for the actual playback or record
+over of the entire buffer. In nonblock mode, programs aren't suspended and
+the above functions returns immediately with the count of bytes which were
+read or written by the driver. When used in this way, don't try to use the
+entire buffer after the call, but instead process the number of bytes
+returned, and call the function again.</P>
+
+<H3>int snd_pcm_info( void *handle, snd_pcm_info_t *info ) </H3>
+
+<P>Fills the *info structure with data about the PCM device selected by
+*handle. Function returns zero if successful, otherwise it returns
+an error code.
+<HR>
+<PRE>
+ #define SND_PCM_INFO_CODEC 0x00000001
+ #define SND_PCM_INFO_DSP SND_PCM_INFO_CODEC
+ #define SND_PCM_INFO_MMAP 0x00000002 /* reserved */
+ #define SND_PCM_INFO_PLAYBACK 0x00000100
+ #define SND_PCM_INFO_RECORD 0x00000200
+ #define SND_PCM_INFO_DUPLEX 0x00000400
+ #define SND_PCM_INFO_DUPLEX_LIMIT 0x00000800 /* rate for playback & record are same */
+
+ struct snd_pcm_info {
+ unsigned int type; /* soundcard type */
+ unsigned int flags; /* see SND_PCM_INFO_XXXX */
+ unsigned char id[32]; /* ID of this PCM device */
+ unsigned char name[80]; /* name of this device */
+ unsigned char reserved[64]; /* reserved for future use */
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>SND_PCM_INFO_MMAP</B><DD><P>This flag is reserved and should be never used. It remains for
+compatibility with Open Sound System driver.</P>
+<DT><B>SND_PCM_INFO_DUPLEX_LIMIT</B><DD><P>If this bit is set, rate must be same for playback and record direction.</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info ) </H3>
+
+<P>Fills the *info structure with data about PCM playback. Function returns
+zero if successful, otherwise it returns an error code.
+<HR>
+<PRE>
+ #define SND_PCM_PINFO_BATCH 0x00000001
+ #define SND_PCM_PINFO_8BITONLY 0x00000002
+ #define SND_PCM_PINFO_16BITONLY 0x00000004
+
+ struct snd_pcm_playback_info {
+ unsigned int flags; /* see SND_PCM_PINFO_XXXX */
+ unsigned int formats; /* supported formats */
+ unsigned int min_rate; /* min rate (in Hz) */
+ unsigned int max_rate; /* max rate (in Hz) */
+ unsigned int min_channels; /* min channels (probably always 1) */
+ unsigned int max_channels; /* max channels */
+ unsigned int buffer_size; /* playback buffer size */
+ unsigned int min_fragment_size; /* min fragment size in bytes */
+ unsigned int max_fragment_size; /* max fragment size in bytes */
+ unsigned int fragment_align; /* align fragment value */
+ unsigned char reserved[64]; /* reserved for future use */
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>SND_PCM_PINFO_BATCH</B><DD><P>Driver implements double buffering with this device. This means that
+the chip used for data processing has its own memory, and output should be
+more delayed than if a traditional codec chip is used.</P>
+<DT><B>SND_PCM_PINFO_8BITONLY</B><DD><P>If this bit is set, the driver uses 8-bit format for 16-bit samples and
+does software conversion. This bit is set on broken SoundBlaster 16/AWE
+soundcards which can't do full 16-bit duplex. If this bit is set
+application or highter digital audio layer should do the conversion from
+16-bit samples to 8-bit samples rather than making the driver to do it in
+the kernel.</P>
+<DT><B>SND_PCM_PINFO_16BITONLY</B><DD><P>If this bit is set, driver uses 16-bit format for 8-bit samples and
+does software conversion. This bit is set on broken SoundBlaster 16/AWE
+soundcards which can't do full 8-bit duplex. If this bit is set the
+application or highter digital audio layer should do conversion from
+8-bit samples to 16-bit samples rather than making the driver to do it in
+the kernel.</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info ) </H3>
+
+<P>Fills the *info structure. Returns zero if successful, otherwise it returns
+an error code.
+<HR>
+<PRE>
+ #define SND_PCM_RINFO_BATCH 0x00000001
+ #define SND_PCM_RINFO_8BITONLY 0x00000002
+ #define SND_PCM_RINFO_16BITONLY 0x00000004
+
+ struct snd_pcm_record_info {
+ unsigned int flags; /* see to SND_PCM_RINFO_XXXX */
+ unsigned int formats; /* supported formats */
+ unsigned int min_rate; /* min rate (in Hz) */
+ unsigned int max_rate; /* max rate (in Hz) */
+ unsigned int min_channels; /* min channels (probably always 1) */
+ unsigned int max_channels; /* max channels */
+ unsigned int buffer_size; /* record buffer size */
+ unsigned int min_fragment_size; /* min fragment size in bytes */
+ unsigned int max_fragment_size; /* max fragment size in bytes */
+ unsigned int fragment_align; /* align fragment value */
+ unsigned char reserved[64]; /* reserved for future... */
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>SND_PCM_PINFO_BATCH</B><DD><P>Driver implements buffering for this device. This means that
+the chip used for data processing has its own memory and output should be
+more delayed than if a traditional codec chip is used.</P>
+<DT><B>SND_PCM_PINFO_8BITONLY</B><DD><P>If this bit is set, the device uses 8-bit format for 16-bit samples and
+does software conversion. This bit is set on broken SoundBlaster 16/AWE
+soundcards which can't do full 16-bit duplex. If this bit is set the
+application or highter digital audio layer should do conversion from
+16-bit samples to 8-bit samples rather than making the driver to do it in
+the kernel.</P>
+<DT><B>SND_PCM_PINFO_16BITONLY</B><DD><P>If this bit is set, the device uses a 16-bit format for 8-bit samples and
+does software conversion. This bit is set on broken SoundBlaster 16/AWE
+soundcards which can't do full 8-bit duplex. If this bit is set the
+application or highter digital audio layer should do the conversion from
+8-bit samples to 16-bit samples rather than making the driver to do it in
+the kernel.</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format ) </H3>
+
+<P>Sets up format, rate (in Hz) and number of channels for playback, in the
+desired direction. Function returns zero if successful, otherwise it
+returns an error code.
+<HR>
+<PRE>
+ struct snd_pcm_format {
+ unsigned int format; /* SND_PCM_SFMT_XXXX */
+ unsigned int rate; /* rate in Hz */
+ unsigned int channels; /* channels (voices) */
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+</P>
+
+<H3>int snd_pcm_record_format( void *handle, snd_pcm_format_t *format ) </H3>
+
+<P>Sets up format, rate (in Hz) and number of channels for used for recording
+in the specified direction. Function returns zero if successful, otherwise
+it returns an error code.
+<HR>
+<PRE>
+ struct snd_pcm_format {
+ unsigned int format; /* SND_PCM_SFMT_XXXX */
+ unsigned int rate; /* rate in Hz */
+ unsigned int channels; /* channels (voices) */
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+</P>
+
+<H3>int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params ) </H3>
+
+<P>Sets various parameters for playback direction. Function returns zero if
+successful, otherwise it returns an error code.
+<HR>
+<PRE>
+ struct snd_pcm_playback_params {
+ int fragment_size;
+ int fragments_max;
+ int fragments_room;
+ unsigned char reserved[16]; /* must be filled with zero */
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>fragment_size</B><DD><P>Requested size of fragment. This value should be aligned for current
+format (for example to 4 if stereo 16-bit samples are used) or with the
+<I>fragment_align</I> variable from <I>snd_pcm_playback_info_t</I>
+structure. Its range can be from <I>min_fragment_size</I> to
+<I>max_fragment_size</I>.</P>
+<DT><B>fragments_max</B><DD><P>Maximum number of fragments in queue for wakeup. This number doesn't
+counts partly used fragment. If current count of filled playback fragments
+is greater than this value driver block application or return immediately
+back if nonblock mode is active.</P>
+<DT><B>fragments_room</B><DD><P>Minumum number of fragments writeable for wakeup. This value should be
+in most cases 1 which means return back to application if at least
+one fragment is free for playback. This value includes partly used fragments,
+too.</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params ) </H3>
+
+<P>Function sets various parameters for the recording direction. Function returns
+zero if successful, otherwise it returns an error code.
+<HR>
+<PRE>
+ struct snd_pcm_record_params {
+ int fragment_size;
+ int fragments_min;
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>fragment_size</B><DD><P>Requested size of fragment. This value should be aligned for current
+format (for example to 4 if stereo 16-bit samples are used) or set to the
+<I>fragment_align</I> variable from <I>snd_pcm_playback_info_t</I>
+structure. Its range can be from <I>min_fragment_size</I> to
+<I>max_fragment_size</I>.</P>
+<DT><B>fragments_min</B><DD><P>Minimum filled fragments for wakeup. Driver blocks the application (if
+block mode is selected) until it isn't filled with number of fragments
+specified with this value.</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status ) </H3>
+
+<P>Fills the *status structure. Function returns zero if successful, otherwise
+it returns an error code.
+<HR>
+<PRE>
+ struct snd_pcm_playback_status {
+ unsigned int rate;
+ int fragments;
+ int fragment_size;
+ int count;
+ int queue;
+ int underrun;
+ struct timeval time;
+ struct timeval stime;
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>rate</B><DD><P>Real playback rate. This value reflects hardware limitations.</P>
+<DT><B>fragments</B><DD><P>Currently allocated fragments by the driver for playback direction.</P>
+<DT><B>fragment_size</B><DD><P>Current fragment size used by driver for the playback direction.</P>
+<DT><B>count</B><DD><P>Count of bytes writeable without blocking.</P>
+<DT><B>queue</B><DD><P>Count of bytes in queue. Note: <I>(fragments * fragment_size) - queue</I>
+should not be equal to <I>count</I>.</P>
+<DT><B>underrun</B><DD><P>This value tells the application the number of underruns since the ast call
+of <I>snd_pcm_playback_status</I>.</P>
+<DT><B>time</B><DD><P>Delay till played of the first sample from next write. This value should
+be used for time synchronization. Returned value is in the same format as
+returned from the standard C function <I>gettimeofday( &time, NULL )</I>.
+This variable contains right value only if playback time mode is enabled
+(look to <I>snd_pcm_playback_time</I> function).</P>
+<DT><B>stime</B><DD><P>Time when playback was started.
+This variable contains right value only if playback time mode is enabled
+(look to <I>snd_pcm_playback_time</I> function).</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status ) </H3>
+
+<P>Fills the *status structure. Function returns zero if successful, otherwise
+it returns an error code.
+<HR>
+<PRE>
+ struct snd_pcm_record_status {
+ unsigned int rate;
+ int fragments;
+ int fragment_size;
+ int count;
+ int free;
+ int overrun;
+ struct timeval time;
+ unsigned char reserved[16];
+ };
+
+</PRE>
+<HR>
+
+<DL>
+<DT><B>rate</B><DD><P>Real record rate. This value reflects hardware limitations.</P>
+<DT><B>fragments</B><DD><P>Currently allocated fragments by driver for the record direction.</P>
+<DT><B>fragment_size</B><DD><P>Current fragment size used by driver for the record direction.</P>
+<DT><B>count</B><DD><P>Count of bytes readable without blocking.</P>
+<DT><B>free</B><DD><P>Count of bytes in buffer still free. Note: <I>(fragments * fragment_size) - free</I>
+should not be equal to <I>count</I>.</P>
+<DT><B>overrun</B><DD><P>This value tells application the count of overruns since the last call
+to <I>snd_pcm_record_status</I>.</P>
+<DT><B>time</B><DD><P>Lag since the next sample read was recorded. This value should be used for time
+synchronization. Returned value is in the same format as returned by the
+from standard C function <I>gettimeofday( &time, NULL )</I>. This
+variable contains right value only if record time mode is enabled (look to
+<I>snd_pcm_record_time</I> function).</P>
+<DT><B>stime</B><DD><P>Time when record was started. This variable contains right value only if
+record time mode is enabled (look to <I>snd_pcm_record_time</I> function).</P>
+</DL>
+</P>
+
+<H3>int snd_pcm_drain_playback( void *handle ) </H3>
+
+<P>This function drain playback buffers immediately. Function returns zero
+if successful, otherwise it returns an error code. </P>
+
+<H3>int snd_pcm_flush_playback( void *handle ) </H3>
+
+<P>This function flushes the playback buffers. It blocks the program while the
+all the waiting samples in kernel playback buffers are processed. Function
+returns zero if successful, otherwise it returns an error code.</P>
+
+<H3>int snd_pcm_flush_record( void *handle ) </H3>
+
+<P>This function flushes (destroyes) record buffers. Function returns zero
+if successful, otherwise it returns an error code. </P>
+
+<H3>int snd_pcm_playback_time( void *handle, int enable ) </H3>
+
+<P>This function enables or disables time mode for playback direction. Time mode
+allows to application better time synchronization. Function returns zero
+if successful, otherwise it returns an error code.</P>
+
+<H3>int snd_pcm_record_time( void *handle, int enable ) </H3>
+
+<P>This function enables or disables time mode for record direction. Time mode
+allows to application better time synchronization. Function returns zero
+if successful, otherwise it returns an error code.</P>
+
+<H3>ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size ) </H3>
+
+<P>Writes samples to the device which must be in the proper format
+specified by the <I>snd_pcm_playback_format</I> function. Function
+returns zero or positive value if playback was successful (value represents
+count of bytes which was successfuly written to device) or an
+error value if error occured. Function should suspend process if
+block mode is active.</P>
+
+<H3>ssize_t snd_pcm_read( void *handle, void *buffer, size_t size ) </H3>
+
+<P>Function reads samples from driver. Samples are in format specified
+by <I>snd_pcm_record_format</I> function. Function returns zero
+or positive value if record was success (value represents count of bytes
+which was successfuly read from device) or negative error value if
+error occured. Function should suspend process if block mode is active.</P>
+
+
+<H2><A NAME="ss5.2">5.2 Examples</A></H2>
+
+<P>The following example shows how to play the first 512kB from the
+/tmp/test.au file with soundcard #0 and PCM device #0:</P>
+<P>
+<BLOCKQUOTE><CODE>
+<HR>
+<PRE>
+int card = 0, device = 0, err, fd, count, size, idx;
+void *handle;
+snd_pcm_format_t format;
+char *buffer;
+
+buffer = (char *)malloc( 512 * 1024 );
+if ( !buffer ) return;
+if ( (err = snd_pcm_open( &handle, card, device, SND_PCM_OPEN_PLAYBACK )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+}
+format.format = SND_PCM_SFMT_MU_LAW;
+format.rate = 8000;
+format.voices = 1;
+if ( (err = snd_pcm_playback_format( handle, &format )) < 0 ) {
+ fprintf( stderr, "format setup failed: %s\n", snd_strerror( err ) );
+ snd_pcm_close( handle );
+ return;
+}
+fd = open( "/tmp/test.au" );
+if ( fd < 0 ) {
+ perror( "open file" );
+ snd_pcm_close( handle );
+ return;
+}
+idx = 0;
+count = read( fd, buffer, 512 * 1024 );
+if ( count <= 0 ) {
+ perror( "read from file" );
+ snd_pcm_close( handle );
+ return;
+}
+close( fd );
+if ( !memcmp( buffer, ".snd", 4 ) ) {
+ idx = (buffer[4]<<24)|(buffer[5]<<16)|(buffer[6]<<8)|(buffer[7]);
+ if ( idx > 128 ) idx = 128;
+ if ( idx > count ) idx = count;
+}
+size = snd_pcm_write( handle, &buffer[ idx ], count - idx );
+printf( "Bytes written %i from %i...\n", size, count - idx );
+snd_pcm_close( handle );
+free( buffer );
+</PRE>
+<HR>
+</CODE></BLOCKQUOTE>
+</P>
+
+
+<HR>
+<A HREF="soundapi-4.html">Previous</A>
+Next
+<A HREF="soundapi.html#toc5">Table of Contents</A>
+</BODY>
+</HTML>
--- /dev/null
+
+<HTML>
+<HEAD>
+<TITLE>Advanced Linux Sound Architecture - Library API</TITLE>
+</HEAD>
+<BODY>
+Previous
+<A HREF="soundapi-1.html">Next</A>
+Table of Contents
+<HR>
+<H1>Advanced Linux Sound Architecture - Library API</H1>
+
+<H2>Jaroslav Kysela <CODE><perex@jcu.cz></CODE> with assistance from Alan Robinson</H2>v0.0.3, 25 March 1998
+<P><HR><EM>This document describes, in full detail, the Advanced Linux Sound Architecture library API.</EM><HR></P>
+<P>
+<H2><A NAME="toc1">1.</A> <A HREF="soundapi-1.html">Introduction</A></H2>
+
+<P>
+<H2><A NAME="toc2">2.</A> <A HREF="soundapi-2.html">Error Codes</A></H2>
+<UL>
+<LI><A HREF="soundapi-2.html#ss2.1">2.1 Error Codes in Detail</A>
+<LI><A HREF="soundapi-2.html#ss2.2">2.2 Functions</A>
+</UL>
+
+<P>
+<H2><A NAME="toc3">3.</A> <A HREF="soundapi-3.html">Control Interface</A></H2>
+<UL>
+<LI><A HREF="soundapi-3.html#ss3.1">3.1 Low-Level Layer</A>
+<LI><A HREF="soundapi-3.html#ss3.2">3.2 Examples</A>
+</UL>
+
+<P>
+<H2><A NAME="toc4">4.</A> <A HREF="soundapi-4.html">Mixer Interface</A></H2>
+<UL>
+<LI><A HREF="soundapi-4.html#ss4.1">4.1 Low-Level Layer</A>
+<LI><A HREF="soundapi-4.html#ss4.2">4.2 Examples</A>
+</UL>
+
+<P>
+<H2><A NAME="toc5">5.</A> <A HREF="soundapi-5.html">Digital Audio (PCM) Interface</A></H2>
+<UL>
+<LI><A HREF="soundapi-5.html#ss5.1">5.1 Low-Level Layer</A>
+<LI><A HREF="soundapi-5.html#ss5.2">5.2 Examples</A>
+</UL>
+
+
+<HR>
+Previous
+<A HREF="soundapi-1.html">Next</A>
+Table of Contents
+</BODY>
+</HTML>
--- /dev/null
+<!doctype linuxdoc system>
+
+<!-- Advanced Linux Sound Architecture - Library API -->
+
+<article>
+
+<!-- Title information -->
+
+<title>Advanced Linux Sound Architecture - Library API
+<author>Jaroslav Kysela <tt><perex@jcu.cz></tt> with assistance from Alan Robinson
+<date>v0.0.3, 25 March 1998
+<abstract>
+This document describes, in full detail, the Advanced Linux Sound
+Architecture library API.
+</abstract>
+
+<!-- Table of contents -->
+<toc>
+
+<!-- Begin the document -->
+
+<sect>Introduction
+
+<p>
+The Advanced Linux Sound Architecture comes with a kernel API & library API.
+This document describes the library API and how it interfaces with the kernel
+API. The kernal API will probably never be documented in standalone form.
+<P>
+Application programmers should use the library API rather than kernel API.
+The Library offers 100% of the functionally of the kernel API, but add next
+major improvements in usability, making the application code simpler and
+better looking. In addition, some of the some fixes/compatibility code in,
+may be placed in the library code instead of the kernel driver.
+<p>
+For a complete list of all variables and functions in the API you should look
+at the following header files:
+<enum>
+ <item>/usr/include/sys/soundlib.h
+ <item>/usr/include/linux/sound.h
+ <item>/usr/include/linux/sounddetect.h
+</enum>
+
+<sect>Error Codes
+
+<p>
+All functions return int (or some sort of signed value). If this value
+is negative it represents an error code. Codes up to SND_ERROR_BEGIN (500000)
+represents standard system errors. Codes equal or greather than this value
+represents sound library API errors. All error codes begin with the prefix
+<it>SND_ERROR_</it>.
+
+<sect1>Error Codes in Detail
+
+<p>
+<descrip>
+<tag>SND_ERROR_UNCOMPATIBLE_VERSION (500000)</tag>
+ This error is caused if the driver uses an incompatible kernel API for this
+ interface and hence the library doesn't know how this API can be used.
+</descrip>
+
+<sect1>Functions
+
+<p>
+
+<sect2>const char *snd_strerror( int errnum )
+ <p>
+ This functions converts error code to a string. Its functionality is the same
+ as the <it>strerror</it> function from the standard C library, but this
+ function returns correct strings for sound error codes, too.
+
+<sect>Control Interface
+
+<p>
+The control interfaces gives application various information about the
+currently installed sound driver in the system. The interface should be used
+to detect if another sound interface is present for selected soundcard or,
+for example, to create a list of devices (MIXER, PCM etc) from which
+the user can select.
+
+<sect1>Low-Level Layer
+
+<sect2>int snd_cards( void )
+ <p>
+ Returns the number of soundcards present in the system, if any. Otherwise
+ it returns a negative value, which maps to an error code. This function
+ will return 0 if no soundcards are detected.
+
+<sect2>unsigned int snd_cards_mask( void )
+ <p>
+ Returns the bitmap of soundcards present in the system, if any. Otherwise
+ it returns a negative value, which maps to an error code. This function
+ will return 0 if no soundcards are detected. First soundcard is represented
+ with bit 0.
+
+<sect2>int snd_ctl_open( void **handle, int card )
+ <p>
+ Creates a new handle and opens communication with the kernel sound
+ control interface for soundcard number <it>card</it> (0-N). The function
+ also checks if protocol is compatible, so as to prevent the use of old
+ programs with a new kernel API. Function returns zero if successful,
+ otherwise an error code is returned.
+
+<sect2>int snd_ctl_close( void *handle )
+ <p>
+ Function frees all resources allocated with control handle and
+ closes the kernel sound control interface. Function returns zero if
+ successful, otherwise it returns an error code.
+
+<sect2>int snd_ctl_file_descriptor( void *handle )
+ <p>
+ Function returns file descriptor for the kernel sound control interface.
+ This function should be used in very special cases. Function returns
+ a negative error code if some error was encountered.
+
+<sect2>int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info *info )
+ <p>
+ Fills the info structure with data about the sound hardware referenced
+ by handle. Function returns zero if successful, otherwise it returns
+ an error code.
+ <code>
+ #define SND_CTL_GCAPS_MIDI 0x0000001 /* driver has MIDI interface */
+
+ #define SND_CTL_LCAPS_SYNTH 0x0000001 /* soundcard has synthesizer */
+ #define SND_CTL_LCAPS_RAWFM 0x0000002 /* soundcard has RAW FM/OPL3 */
+
+ struct snd_ctl_hw_info {
+ unsigned int type; /* type of card - see SND_CARD_TYPE_XXXX */
+ unsigned int gcaps; /* see SND_CTL_GCAPS_XXXX */
+ unsigned int lcaps; /* see SND_CTL_LCAPS_XXXX */
+ unsigned int pcmdevs; /* count of PCM devices (0 to N) */
+ unsigned int mixerdevs; /* count of MIXER devices (0 to N) */
+ unsigned int mididevs; /* count of raw MIDI devices (0 to N) */
+ char id[8]; /* ID of card (user selectable) */
+ char name[80]; /* name/info text about soundcard */
+ unsigned char reserved[128]; /* reserved for future use */
+ };
+ </code>
+
+<sect2>int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t *info )
+ <p>
+ Fills the *info structure with data about the PCM device. Function returns
+ zero if successful, otherwise it returns an error code. Details about
+ the snd_pcm_info_t structure are in the <bf>Digital Audio (PCM) Interface</bf>
+ section. The argument <it>dev</it> selects the device number for the
+ soundcard referenced by *handle. Its range is 0 to N where N is
+ <it>struct snd_ctl_hw_info -> pcmdevs - 1</it>. This function will work if
+ the selected PCM device is busy, too. It should be used to collect
+ information about PCM devices without exclusive lock.
+
+<sect2>int snd_ctl_pcm_playback_info( void *handle, int dev, snd_pcm_playback_info_t *info )
+ <p>
+ Fills the *info structure with data about the PCM device and playback direction.
+ Function returns zero if successful, otherwise it returns an error code.
+ Details about the snd_pcm_playback_info_t structure are in the
+ <bf>Digital Audio (PCM) Interface</bf> section. The argument <it>dev</it>
+ selects the device number for the soundcard referenced by *handle. Its
+ range is 0 to N where N is <it>struct snd_ctl_hw_info -> pcmdevs - 1</it>.
+ This function will work if the selected PCM device is busy, too. It should
+ be used to collect information about PCM devices without exclusive lock.
+
+<sect2>int snd_ctl_pcm_record_info( void *handle, int dev, snd_pcm_record_info_t *info )
+ <p>
+ Fills the *info structure with data about the PCM device and record direction.
+ Function returns zero if successful, otherwise it returns an error code.
+ Details about the snd_pcm_record_info_t structure are in the
+ <bf>Digital Audio (PCM) Interface</bf> section. The argument <it>dev</it>
+ selects the device number for the soundcard referenced by *handle. Its
+ range is 0 to N where N is <it>struct snd_ctl_hw_info -> pcmdevs - 1</it>.
+ This function will work if the selected PCM device is busy, too. It should
+ be used to collect information about PCM devices without exclusive lock.
+
+<sect2>int snd_ctl_mixer_info( void *handle, int dev, snd_mixer_info_t *info )
+ <p>
+ Fills the *info structure with data about the mixer device. Returns zero
+ if successful, otherwise it returns an error code. Details about the
+ snd_mixer_info_t structure are in the <bf>Mixer Interface</bf> section.
+ The argument <it>dev</it> specifies the device number for the appropriate
+ soundcard. Its range is 0 to N where N found from
+ <it>struct snd_ctl_hw_info -> mixerdevs - 1</it>.
+ It should be used to collect information about mixer devices.
+
+<sect1>Examples
+
+<p>
+The following example shows how all PCM devices can be detected for the first
+soundcard (#0) in the system.
+
+<tscreen><code>
+int card = 0, err;
+void *handle;
+stuct snd_ctl_hw_info info;
+
+if ( (err = snd_ctl_open( &ero;handle, card )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+}
+if ( (err = snd_ctl_hw_info( handle, &ero;info )) < 0 ) {
+ fprintf( stderr, "hw info failed: %s\n", snd_strerror( err ) );
+ snd_ctl_close( handle );
+ return;
+}
+printf( "Installed PCM devices for card #i: %i\n", card + 1, info.pcmdevs );
+snd_ctl_close( handle );
+</code></tscreen>
+
+<sect>Mixer Interface
+
+<p>
+The Mixer Interface allows applications to change the volume level of
+a soundcard's input/output channels in both the linear range (0-100)
+and in decibels. It also supports features like hardware mute, input
+sound source, etc.
+
+<sect1>Low-Level Layer
+
+<p>
+Mixer devices aren't opened exclusively. This allows applications to
+open a device multiple times with one or more processes.
+
+<sect2>int snd_mixer_open( void **handle, int card, int device )
+ <p>
+ Creates new handle and opens a connection to the kernel sound
+ mixer interface for soundcard number <it>card</it> (0-N) and mixer
+ device number <it>device</it>. Also checks if protocol is
+ compatible to prevent use of old programs with new kernel API. Function
+ returns zero if successful, otherwise it returns an error code.
+
+<sect2>int snd_mixer_close( void *handle )
+ <p>
+ Frees all resources allocated to the mixer handle and
+ closes its connection to the kernel sound mixer interface. Function
+ returns zero if successful, otherwise it returns an error code.
+
+<sect2>int snd_mixer_file_descriptor( void *handle )
+ <p>
+ Returns the file descriptor for the connection to the kernel sound
+ mixer interface. This function should be used only in very
+ special cases. Function returns a negative error code if an
+ error was encountered.
+ <p>
+ The file descriptor should be used for the <it>select</it> synchronous
+ multiplexer function for deterimeing read direction. Applications should
+ call <it>snd_mixer_read</it> function if some data is waiting to be read.
+ It is recomended that you do this, since it leaves place for this function
+ to handle some new kernel API specifications.
+
+<sect2>int snd_mixer_channels( void *handle )
+ <p>
+ Returns the count of mixer channels for appropriate mixer device, otherwise
+ the return value is negative, and signifies an error code. Never returns
+ zero.
+
+<sect2>int snd_mixer_info( void *handle, snd_mixer_info_t *info )
+ <p>
+ Fills the *info structure with information about the mixer associated with
+ *handle. Returns zero if successful, otherwise it returns an error code.
+ <code>
+ #define SND_MIXER_INFO_CAP_EXCL_RECORD 0x00000001
+
+ struct snd_mixer_info {
+ unsigned int type; /* type of soundcard - SND_CARD_TYPE_XXXX */
+ unsigned int channels; /* count of mixer devices */
+ unsigned int caps; /* some flags about this device (SND_MIXER_INFO_CAP_XXXX) */
+ unsigned char id[32]; /* ID of this mixer */
+ unsigned char name[80]; /* name of this device */
+ char reserved[ 32 ]; /* reserved for future use */
+ };
+ </code>
+
+<sect2>int snd_mixer_channel( void *handle, const char *channel_id )
+ <p>
+ Returns the channel number (index) associated with channel_id (channel name),
+ or returns an error code.
+ <code>
+ #define SND_MIXER_ID_MASTER "Master"
+ #define SND_MIXER_ID_BASS "Bass"
+ #define SND_MIXER_ID_TREBLE "Treble"
+ #define SND_MIXER_ID_SYNTHESIZER "Synth"
+ #define SND_MIXER_ID_SYNTHESIZER1 "Synth 1"
+ #define SND_MIXER_ID_FM "FM"
+ #define SND_MIXER_ID_EFFECT "Effect"
+ #define SND_MIXER_ID_PCM "PCM"
+ #define SND_MIXER_ID_PCM1 "PCM 1"
+ #define SND_MIXER_ID_LINE "Line-In"
+ #define SND_MIXER_ID_MIC "MIC"
+ #define SND_MIXER_ID_CD "CD"
+ #define SND_MIXER_ID_GAIN "Record-Gain"
+ #define SND_MIXER_ID_IGAIN "In-Gain"
+ #define SND_MIXER_ID_OGAIN "Out-Gain"
+ #define SND_MIXER_ID_LOOPBACK "Loopback"
+ #define SND_MIXER_ID_SPEAKER "PC Speaker"
+ #define SND_MIXER_ID_AUXA "Aux A"
+ #define SND_MIXER_ID_AUXB "Aux B"
+ #define SND_MIXER_ID_AUXC "Aux C"
+ </code>
+
+<sect2>int snd_mixer_exact_mode( void *handle, int enable )
+ <p>
+ Turns on or off (by default) exact mode. This mode allows to application
+ set/get volume values in exact range which uses hardware. In non-exact
+ mode is range always from 0 to 100 and conversion to hardware range does
+ driver. Function returns zero if successful, otherwise it returns an error
+ code.
+
+<sect2>int snd_mixer_channel_info( void *handle, int channel, snd_mixer_channel_info_t *info )
+ <p>
+ Fills the *info structure. The argument <it>channel</it> specifies channel
+ (0 to N) for which is the info requested. Function returns zero if
+ successful, otherwise it returns an error code.
+ <code>
+ #define SND_MIXER_CINFO_CAP_RECORD 0x00000001
+ #define SND_MIXER_CINFO_CAP_STEREO 0x00000002
+ #define SND_MIXER_CINFO_CAP_MUTE 0x00000004
+ #define SND_MIXER_CINFO_CAP_HWMUTE 0x00000008 /* channel supports hardware mute */
+ #define SND_MIXER_CINFO_CAP_DIGITAL 0x00000010 /* channel does digital (not analog) mixing */
+ #define SND_MIXER_CINOF_CAP_INPUT 0x00000020 /* input channel */
+
+ struct snd_mixer_channel_info {
+ unsigned int channel; /* channel # (filled by application) */
+ unsigned int parent; /* parent channel # or SND_MIXER_PARENT */
+ unsigned char name[12]; /* name of this device */
+ unsigned int caps; /* some flags about this device (SND_MIXER_CINFO_XXXX) */
+ int min; /* min. value when exact mode (or always 0) */
+ int max; /* max. value when exact mode (or always 100) */
+ int min_dB; /* minimum decibel value (*100) */
+ int max_dB; /* maximum decibel value (*100) */
+ int step_dB; /* step decibel value (*100) */
+ unsigned char reserved[16];
+ };
+ </code>
+
+<sect2>int snd_mixer_channel_read( void *handle, int channel, snd_mixer_channel_t *data )
+ <p>
+ Fills the *data structure. The argument <it>channel</it> specifies
+ the channel (0 to N) for which is data requested. Function returns
+ zero if successful, otherwise it returns an error code.
+ <code>
+ #define SND_MIXER_FLG_RECORD 0x00000001 /* channel record source flag */
+ #define SND_MIXER_FLG_MUTE_LEFT 0x00010000
+ #define SND_MIXER_FLG_MUTE_RIGHT 0x00020000
+ #define SND_MIXER_FLG_MUTE 0x00030000
+ #define SND_MIXER_FLG_DECIBEL 0x40000000
+ #define SND_MIXER_FLG_FORCE 0x80000000
+
+ struct snd_mixer_channel {
+ unsigned int channel; /* channel # (filled by application) */
+ unsigned int flags; /* some flags to read/write (SND_MIXER_FLG_XXXX) */
+ int left; /* min - max when exact mode (or 0 - 100) */
+ int right; /* min - max when exact mode (or 0 - 100) */
+ int left_dB; /* dB * 100 */
+ int right_dB; /* dB * 100 */
+ unsigned char reserved[16];
+ };
+ </code>
+ <p>
+ <descrip>
+ <tag>SND_MIXER_FLG_RECORD</tag>
+ Record source flag.
+ <tag>SND_MIXER_FLG_DECIBEL</tag>
+ If this bit is set, driver set volume from dB variables <it>left_dB</it>
+ and <it>right_dB</it>.
+ <tag>SND_MIXER_FLG_FORCE</tag>
+ Force set - this bit shouldn't be used from user space. Reserved for
+ kernel.
+ </descrip>
+
+<sect2>int snd_mixer_channel_write( void *handle, int channel, snd_mixer_channel_t *data )
+ <p>
+ Writes the *data structure to kernel. The <it>channel</it> argument
+ specifies the channel (0 to N) for which is data is to be applied.
+ Function returns zero if successful, otherwise it returns an error code.
+ This functions is the opposite of <it>snd_mixer_channel_read</it>.
+
+<sect2>int snd_mixer_special_read( void *handle, snd_mixer_special_t *special )
+ <p>
+ Not documented...
+
+<sect2>int snd_mixer_special_write( void *handle, snd_mixer_special_t *special )
+ <p>
+ Not documented...
+
+<sect2>int snd_mixer_read( void *handle, snd_mixer_callbacks_t *callbacks )
+ <p>
+ This function reads and parses data from driver. Parsed actions are returned
+ back to the application using the <it>callbacks</it> structure. Applications
+ should not parse data from the driver in standard cases. This function
+ returns immediately after all data is read from driver. Does not
+ block process.
+ <code>
+ typedef struct snd_mixer_callbacks {
+ void *private_data; /* should be used by application */
+ void (*channel_was_changed)( void *private_data, int channel );
+ void *reserved[15]; /* reserved for future use - must be NULL!!! */
+ } snd_mixer_callbacks_t;
+ </code>
+
+<sect1>Examples
+
+<p>
+The following example shows installed mixer channels for soundcard #0 and
+mixer device #0 in the system, and also sets the master volume (if present)
+to 50.
+
+<tscreen><code>
+int card = 0, device = 0, err;
+void *handle;
+snd_mixer_info_t info;
+snd_mixer_channel_t channel;
+
+if ( (err = snd_mixer_open( &ero;handle, card, device )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+}
+if ( (err = snd_mixer_info( handle, &ero;info )) < 0 ) {
+ fprintf( stderr, "info failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+}
+printf( "Installed MIXER channels for card #i and device %i: %i\n",
+ card + 1, device, info.channels );
+master = snd_mixer_channel( handle, SND_MIXER_ID_MASTER );
+if ( master >= 0 ) {
+ if ( (err = snd_mixer_read( handle, master, &ero;channel )) < 0 ) {
+ fprintf( stderr, "master read failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+ channel -> left = channel -> right = 50;
+ if ( (err = snd_mixer_write( handle, master, &ero;channel )) < 0 ) {
+ fprintf( stderr, "master write failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+}
+snd_mixer_close( handle );
+</code></tscreen>
+
+<sect>Digital Audio (PCM) Interface
+
+<p>
+Digital audio is the most commonly used method of representing sound inside
+a computer. In this method sound is stored as a sequence of samples taken
+from the audio signal using constant time intervals. A sample represents
+volume of the signal at the moment when it was measured. In uncompressed
+digital audio each sample require one or more bytes of storage. The number of
+bytes required depends on number of channels (mono, stereo) and sample
+format (8 or 16 bits, mu-Law, etc.). The length of this interval determines
+the sampling rate. Commonly used sampling rates are between 8 kHz (telephone
+quality) and 48 kHz (DAT tapes).
+<p>
+The physical devices used in digital audio are called the ADC (Analog to
+Digital Converter) and DAC (Digital to Analog Converter). A device containing
+both ADC and DAC is commonly known as a codec. The codec device used in
+a Sound Blaster cards is called a DSP which is somewhat misleading since DSP
+also stands for Digital Signal Processor (the SB DSP chip is very limited
+when compared to "true" DSP chips).
+<p>
+Sampling parameters affect the quality of sound which can be reproduced from
+the recorded signal. The most fundamental parameter is sampling rate which
+limits the highest frequency than can be stored. It is well known (Nyquist's
+Sampling Theorem) that the highest frequency that can be stored in a sampled
+signal is at most 1/2 of the sampling frequency. For example, a 8 kHz sampling
+rate permits the recording of a signal in which the highest frequency is less
+than 4 kHz. Higher frequency signals must be filtered out before feeding them
+to DAC.
+<p>
+Sample encoding limits the dynamic range of recorded signal (difference between
+the faintest and the loudest signal that can be recorded). In theory the
+maximum dynamic range of signal is number_of_bits * 6 dB . This means that
+8 bits sampling resolution gives dynamic range of 48 dB and 16 bit resolution
+gives 96 dB.
+<p>
+Quality has price. The number of bytes required to store an audio sequence
+depends on sampling rate, number of channels and sampling resolution. For
+example just 8000 bytes of memory is required to store one second of sound
+using 8 kHz/8 bits/mono but 48 kHz/16bit/stereo takes 192 kilobytes. A 64 kbps
+ISDN channel is required to transfer a 8kHz/8bit/mono audio stream in real
+time, and about 1.5 Mbps is required for DAT quality (48kHz/16bit/stereo).
+On the other hand it is possible to store just 5.46 seconds of sound in
+a megabyte of memory when using 48kHz/16bit/stereo sampling. With
+8kHz/8bits/mono it is possible to store 131 seconds of sound using the same
+amount of memory. It is possible to reduce memory and communication costs by
+compressing the recorded signal but this is out of the scope of this document.
+
+<sect1>Low-Level Layer
+
+<p>
+Audio devices are opened exclusively for a selected direction. This doesn't
+allow open from more than one processes for the same audio device in the
+same direction, but does allow one open call to each playback direction and
+second open call to record direction independently. Audio devices return
+EBUSY error to applications when other applications have already opened the
+requested direction.
+<p>
+Low-Level layer supports these formats:
+<tscreen><code>
+#define SND_PCM_SFMT_MU_LAW 0
+#define SND_PCM_SFMT_A_LAW 1
+#define SND_PCM_SFMT_IMA_ADPCM 2
+#define SND_PCM_SFMT_U8 3
+#define SND_PCM_SFMT_S16_LE 4
+#define SND_PCM_SFMT_S16_BE 5
+#define SND_PCM_SFMT_S8 6
+#define SND_PCM_SFMT_U16_LE 7
+#define SND_PCM_SFMT_U16_BE 8
+#define SND_PCM_SFMT_MPEG 9
+#define SND_PCM_SFMT_GSM 10
+
+#define SND_PCM_FMT_MU_LAW (1 << SND_PCM_SFMT_MU_LAW)
+#define SND_PCM_FMT_A_LAW (1 << SND_PCM_SFMT_A_LAW)
+#define SND_PCM_FMT_IMA_ADPCM (1 << SND_PCM_SFMT_IMA_ADPCM)
+#define SND_PCM_FMT_U8 (1 << SND_PCM_SFMT_U8)
+#define SND_PCM_FMT_S16_LE (1 << SND_PCM_SFMT_S16_LE)
+#define SND_PCM_FMT_S16_BE (1 << SND_PCM_SFMT_S16_BE)
+#define SND_PCM_FMT_S8 (1 << SND_PCM_SFMT_S8)
+#define SND_PCM_FMT_U16_LE (1 << SND_PCM_SFMT_U16_LE)
+#define SND_PCM_FMT_U16_BE (1 << SND_PCM_SFMT_U16_BE)
+#define SND_PCM_FMT_MPEG (1 << SND_PCM_SFMT_MPEG)
+#define SND_PCM_FMT_GSM (1 << SND_PCM_SFMT_GSM)
+</code></tscreen>
+Constants with prefix <bf>SND_PCM_FMT_</bf> are used in info structures
+and constants with prefix <bf>SND_PCM_SFMT_</bf> are used in format structures.
+
+<sect2>int snd_pcm_open( void **handle, int card, int device, int mode )
+ <p>
+ Creates a new handle and opens a connection to kernel sound
+ audio interface for soundcard number <it>card</it> (0-N) and audio
+ device number <it>device</it>. Function also checks if protocol is
+ compatible to prevent use of old programs with a new kernel API. Function
+ returns zero if successful,ful otherwise it returns an error code.
+ Error code -EBUSY is returned when some process ownes the selected direction.
+ <p>
+ Default format after opening is mono <it>mu-Law</it> at 8000Hz. This device
+ can be used directly for playback of standard .au (Sparc) files.
+ <p>
+ The following modes should be used for the <it>mode</it> argument:
+ <code>
+ #define SND_PCM_OPEN_PLAYBACK (O_WRONLY)
+ #define SND_PCM_OPEN_RECORD (O_RDONLY)
+ #define SND_PCM_OPEN_DUPLEX (O_RDWR)
+ </code>
+
+<sect2>int snd_pcm_close( void *handle )
+ <p>
+ Frees all resources allocated with audio handle and
+ closes the connection to the kernel sound audio interface. Function
+ returns zero if successful, otherwise it returns an error code.
+
+<sect2>int snd_pcm_file_descriptor( void *handle )
+ <p>
+ Returns the file descriptor of the connection to the kernel sound
+ audio interface. Function returns an error code if an
+ error was encountered.
+ <p>
+ The file descriptor should be used for the <it>select</it> synchronous
+ multiplexer function for setting the read direction. Application should
+ call <it>snd_pcm_read</it> or <it>snd_pcm_write</it> functions if some
+ data is waiting for reading or a write can be performed. Calling this
+ function is highly recomended, as it leaves a place for the API to things
+ like data conversions, if needed.
+
+<sect2>int snd_pcm_block_mode( void *handle, int enable )
+ <p>
+ Sets up block (default) or nonblock mode for a handle. Block mode suspends
+ execution of a program when <it>snd_pcm_read</it> or <it>snd_pcm_write</it>
+ is called for the time which is needed for the actual playback or record
+ over of the entire buffer. In nonblock mode, programs aren't suspended and
+ the above functions returns immediately with the count of bytes which were
+ read or written by the driver. When used in this way, don't try to use the
+ entire buffer after the call, but instead process the number of bytes
+ returned, and call the function again.
+
+<sect2>int snd_pcm_info( void *handle, snd_pcm_info_t *info )
+ <p>
+ Fills the *info structure with data about the PCM device selected by
+ *handle. Function returns zero if successful, otherwise it returns
+ an error code.
+ <code>
+ #define SND_PCM_INFO_CODEC 0x00000001
+ #define SND_PCM_INFO_DSP SND_PCM_INFO_CODEC
+ #define SND_PCM_INFO_MMAP 0x00000002 /* reserved */
+ #define SND_PCM_INFO_PLAYBACK 0x00000100
+ #define SND_PCM_INFO_RECORD 0x00000200
+ #define SND_PCM_INFO_DUPLEX 0x00000400
+ #define SND_PCM_INFO_DUPLEX_LIMIT 0x00000800 /* rate for playback & record are same */
+
+ struct snd_pcm_info {
+ unsigned int type; /* soundcard type */
+ unsigned int flags; /* see SND_PCM_INFO_XXXX */
+ unsigned char id[32]; /* ID of this PCM device */
+ unsigned char name[80]; /* name of this device */
+ unsigned char reserved[64]; /* reserved for future use */
+ };
+ </code>
+ <descrip>
+ <tag>SND_PCM_INFO_MMAP</tag>
+ This flag is reserved and should be never used. It remains for
+ compatibility with Open Sound System driver.
+ <tag>SND_PCM_INFO_DUPLEX_LIMIT</tag>
+ If this bit is set, rate must be same for playback and record direction.
+ </descrip>
+
+<sect2>int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info )
+ <p>
+ Fills the *info structure with data about PCM playback. Function returns
+ zero if successful, otherwise it returns an error code.
+ <code>
+ #define SND_PCM_PINFO_BATCH 0x00000001
+ #define SND_PCM_PINFO_8BITONLY 0x00000002
+ #define SND_PCM_PINFO_16BITONLY 0x00000004
+
+ struct snd_pcm_playback_info {
+ unsigned int flags; /* see SND_PCM_PINFO_XXXX */
+ unsigned int formats; /* supported formats */
+ unsigned int min_rate; /* min rate (in Hz) */
+ unsigned int max_rate; /* max rate (in Hz) */
+ unsigned int min_channels; /* min channels (probably always 1) */
+ unsigned int max_channels; /* max channels */
+ unsigned int buffer_size; /* playback buffer size */
+ unsigned int min_fragment_size; /* min fragment size in bytes */
+ unsigned int max_fragment_size; /* max fragment size in bytes */
+ unsigned int fragment_align; /* align fragment value */
+ unsigned char reserved[64]; /* reserved for future use */
+ };
+ </code>
+ <descrip>
+ <tag>SND_PCM_PINFO_BATCH</tag>
+ Driver implements double buffering with this device. This means that
+ the chip used for data processing has its own memory, and output should be
+ more delayed than if a traditional codec chip is used.
+ <tag>SND_PCM_PINFO_8BITONLY</tag>
+ If this bit is set, the driver uses 8-bit format for 16-bit samples and
+ does software conversion. This bit is set on broken SoundBlaster 16/AWE
+ soundcards which can't do full 16-bit duplex. If this bit is set
+ application or highter digital audio layer should do the conversion from
+ 16-bit samples to 8-bit samples rather than making the driver to do it in
+ the kernel.
+ <tag>SND_PCM_PINFO_16BITONLY</tag>
+ If this bit is set, driver uses 16-bit format for 8-bit samples and
+ does software conversion. This bit is set on broken SoundBlaster 16/AWE
+ soundcards which can't do full 8-bit duplex. If this bit is set the
+ application or highter digital audio layer should do conversion from
+ 8-bit samples to 16-bit samples rather than making the driver to do it in
+ the kernel.
+ </descrip>
+
+<sect2>int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info )
+ <p>
+ Fills the *info structure. Returns zero if successful, otherwise it returns
+ an error code.
+ <code>
+ #define SND_PCM_RINFO_BATCH 0x00000001
+ #define SND_PCM_RINFO_8BITONLY 0x00000002
+ #define SND_PCM_RINFO_16BITONLY 0x00000004
+
+ struct snd_pcm_record_info {
+ unsigned int flags; /* see to SND_PCM_RINFO_XXXX */
+ unsigned int formats; /* supported formats */
+ unsigned int min_rate; /* min rate (in Hz) */
+ unsigned int max_rate; /* max rate (in Hz) */
+ unsigned int min_channels; /* min channels (probably always 1) */
+ unsigned int max_channels; /* max channels */
+ unsigned int buffer_size; /* record buffer size */
+ unsigned int min_fragment_size; /* min fragment size in bytes */
+ unsigned int max_fragment_size; /* max fragment size in bytes */
+ unsigned int fragment_align; /* align fragment value */
+ unsigned char reserved[64]; /* reserved for future... */
+ };
+ </code>
+ <descrip>
+ <tag>SND_PCM_PINFO_BATCH</tag>
+ Driver implements buffering for this device. This means that
+ the chip used for data processing has its own memory and output should be
+ more delayed than if a traditional codec chip is used.
+ <tag>SND_PCM_PINFO_8BITONLY</tag>
+ If this bit is set, the device uses 8-bit format for 16-bit samples and
+ does software conversion. This bit is set on broken SoundBlaster 16/AWE
+ soundcards which can't do full 16-bit duplex. If this bit is set the
+ application or highter digital audio layer should do conversion from
+ 16-bit samples to 8-bit samples rather than making the driver to do it in
+ the kernel.
+ <tag>SND_PCM_PINFO_16BITONLY</tag>
+ If this bit is set, the device uses a 16-bit format for 8-bit samples and
+ does software conversion. This bit is set on broken SoundBlaster 16/AWE
+ soundcards which can't do full 8-bit duplex. If this bit is set the
+ application or highter digital audio layer should do the conversion from
+ 8-bit samples to 16-bit samples rather than making the driver to do it in
+ the kernel.
+ </descrip>
+
+<sect2>int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format )
+ <p>
+ Sets up format, rate (in Hz) and number of channels for playback, in the
+ desired direction. Function returns zero if successful, otherwise it
+ returns an error code.
+ <code>
+ struct snd_pcm_format {
+ unsigned int format; /* SND_PCM_SFMT_XXXX */
+ unsigned int rate; /* rate in Hz */
+ unsigned int channels; /* channels (voices) */
+ unsigned char reserved[16];
+ };
+ </code>
+
+<sect2>int snd_pcm_record_format( void *handle, snd_pcm_format_t *format )
+ <p>
+ Sets up format, rate (in Hz) and number of channels for used for recording
+ in the specified direction. Function returns zero if successful, otherwise
+ it returns an error code.
+ <code>
+ struct snd_pcm_format {
+ unsigned int format; /* SND_PCM_SFMT_XXXX */
+ unsigned int rate; /* rate in Hz */
+ unsigned int channels; /* channels (voices) */
+ unsigned char reserved[16];
+ };
+ </code>
+
+<sect2>int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params )
+ <p>
+ Sets various parameters for playback direction. Function returns zero if
+ successful, otherwise it returns an error code.
+ <code>
+ struct snd_pcm_playback_params {
+ int fragment_size;
+ int fragments_max;
+ int fragments_room;
+ unsigned char reserved[16]; /* must be filled with zero */
+ };
+ </code>
+ <descrip>
+ <tag>fragment_size</tag>
+ Requested size of fragment. This value should be aligned for current
+ format (for example to 4 if stereo 16-bit samples are used) or with the
+ <it>fragment_align</it> variable from <it>snd_pcm_playback_info_t</it>
+ structure. Its range can be from <it>min_fragment_size</it> to
+ <it>max_fragment_size</it>.
+ <tag>fragments_max</tag>
+ Maximum number of fragments in queue for wakeup. This number doesn't
+ counts partly used fragment. If current count of filled playback fragments
+ is greater than this value driver block application or return immediately
+ back if nonblock mode is active.
+ <tag>fragments_room</tag>
+ Minumum number of fragments writeable for wakeup. This value should be
+ in most cases 1 which means return back to application if at least
+ one fragment is free for playback. This value includes partly used fragments,
+ too.
+ </descrip>
+
+<sect2>int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params )
+ <p>
+ Function sets various parameters for the recording direction. Function returns
+ zero if successful, otherwise it returns an error code.
+ <code>
+ struct snd_pcm_record_params {
+ int fragment_size;
+ int fragments_min;
+ unsigned char reserved[16];
+ };
+ </code>
+ <descrip>
+ <tag>fragment_size</tag>
+ Requested size of fragment. This value should be aligned for current
+ format (for example to 4 if stereo 16-bit samples are used) or set to the
+ <it>fragment_align</it> variable from <it>snd_pcm_playback_info_t</it>
+ structure. Its range can be from <it>min_fragment_size</it> to
+ <it>max_fragment_size</it>.
+ <tag>fragments_min</tag>
+ Minimum filled fragments for wakeup. Driver blocks the application (if
+ block mode is selected) until it isn't filled with number of fragments
+ specified with this value.
+ </descrip>
+
+<sect2>int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status )
+ <p>
+ Fills the *status structure. Function returns zero if successful, otherwise
+ it returns an error code.
+ <code>
+ struct snd_pcm_playback_status {
+ unsigned int rate;
+ int fragments;
+ int fragment_size;
+ int count;
+ int queue;
+ int underrun;
+ struct timeval time;
+ struct timeval stime;
+ unsigned char reserved[16];
+ };
+ </code>
+ <descrip>
+ <tag>rate</tag>
+ Real playback rate. This value reflects hardware limitations.
+ <tag>fragments</tag>
+ Currently allocated fragments by the driver for playback direction.
+ <tag>fragment_size</tag>
+ Current fragment size used by driver for the playback direction.
+ <tag>count</tag>
+ Count of bytes writeable without blocking.
+ <tag>queue</tag>
+ Count of bytes in queue. Note: <it>(fragments * fragment_size) - queue</it>
+ should not be equal to <it>count</it>.
+ <tag>underrun</tag>
+ This value tells the application the number of underruns since the ast call
+ of <it>snd_pcm_playback_status</it>.
+ <tag>time</tag>
+ Delay till played of the first sample from next write. This value should
+ be used for time synchronization. Returned value is in the same format as
+ returned from the standard C function <it>gettimeofday( &ero;time, NULL )</it>.
+ This variable contains right value only if playback time mode is enabled
+ (look to <it>snd_pcm_playback_time</it> function).
+ <tag>stime</tag>
+ Time when playback was started.
+ This variable contains right value only if playback time mode is enabled
+ (look to <it>snd_pcm_playback_time</it> function).
+ </descrip>
+
+<sect2>int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status )
+ <p>
+ Fills the *status structure. Function returns zero if successful, otherwise
+ it returns an error code.
+ <code>
+ struct snd_pcm_record_status {
+ unsigned int rate;
+ int fragments;
+ int fragment_size;
+ int count;
+ int free;
+ int overrun;
+ struct timeval time;
+ unsigned char reserved[16];
+ };
+ </code>
+ <descrip>
+ <tag>rate</tag>
+ Real record rate. This value reflects hardware limitations.
+ <tag>fragments</tag>
+ Currently allocated fragments by driver for the record direction.
+ <tag>fragment_size</tag>
+ Current fragment size used by driver for the record direction.
+ <tag>count</tag>
+ Count of bytes readable without blocking.
+ <tag>free</tag>
+ Count of bytes in buffer still free. Note: <it>(fragments * fragment_size) - free</it>
+ should not be equal to <it>count</it>.
+ <tag>overrun</tag>
+ This value tells application the count of overruns since the last call
+ to <it>snd_pcm_record_status</it>.
+ <tag>time</tag>
+ Lag since the next sample read was recorded. This value should be used for time
+ synchronization. Returned value is in the same format as returned by the
+ from standard C function <it>gettimeofday( &ero;time, NULL )</it>. This
+ variable contains right value only if record time mode is enabled (look to
+ <it>snd_pcm_record_time</it> function).
+ <tag>stime</tag>
+ Time when record was started. This variable contains right value only if
+ record time mode is enabled (look to <it>snd_pcm_record_time</it> function).
+ </descrip>
+
+<sect2>int snd_pcm_drain_playback( void *handle )
+ <p>
+ This function drain playback buffers immediately. Function returns zero
+ if successful, otherwise it returns an error code.
+
+<sect2>int snd_pcm_flush_playback( void *handle )
+ <p>
+ This function flushes the playback buffers. It blocks the program while the
+ all the waiting samples in kernel playback buffers are processed. Function
+ returns zero if successful, otherwise it returns an error code.
+
+<sect2>int snd_pcm_flush_record( void *handle )
+ <p>
+ This function flushes (destroyes) record buffers. Function returns zero
+ if successful, otherwise it returns an error code.
+
+<sect2>int snd_pcm_playback_time( void *handle, int enable )
+ <p>
+ This function enables or disables time mode for playback direction. Time mode
+ allows to application better time synchronization. Function returns zero
+ if successful, otherwise it returns an error code.
+
+<sect2>int snd_pcm_record_time( void *handle, int enable )
+ <p>
+ This function enables or disables time mode for record direction. Time mode
+ allows to application better time synchronization. Function returns zero
+ if successful, otherwise it returns an error code.
+
+<sect2>ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size )
+ <p>
+ Writes samples to the device which must be in the proper format
+ specified by the <it>snd_pcm_playback_format</it> function. Function
+ returns zero or positive value if playback was successful (value represents
+ count of bytes which was successfuly written to device) or an
+ error value if error occured. Function should suspend process if
+ block mode is active.
+
+<sect2>ssize_t snd_pcm_read( void *handle, void *buffer, size_t size )
+ <p>
+ Function reads samples from driver. Samples are in format specified
+ by <it>snd_pcm_record_format</it> function. Function returns zero
+ or positive value if record was success (value represents count of bytes
+ which was successfuly read from device) or negative error value if
+ error occured. Function should suspend process if block mode is active.
+
+<sect1>Examples
+
+<p>
+The following example shows how to play the first 512kB from the
+/tmp/test.au file with soundcard #0 and PCM device #0:
+
+<tscreen><code>
+int card = 0, device = 0, err, fd, count, size, idx;
+void *handle;
+snd_pcm_format_t format;
+char *buffer;
+
+buffer = (char *)malloc( 512 * 1024 );
+if ( !buffer ) return;
+if ( (err = snd_pcm_open( &ero;handle, card, device, SND_PCM_OPEN_PLAYBACK )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+}
+format.format = SND_PCM_SFMT_MU_LAW;
+format.rate = 8000;
+format.voices = 1;
+if ( (err = snd_pcm_playback_format( handle, &ero;format )) < 0 ) {
+ fprintf( stderr, "format setup failed: %s\n", snd_strerror( err ) );
+ snd_pcm_close( handle );
+ return;
+}
+fd = open( "/tmp/test.au" );
+if ( fd < 0 ) {
+ perror( "open file" );
+ snd_pcm_close( handle );
+ return;
+}
+idx = 0;
+count = read( fd, buffer, 512 * 1024 );
+if ( count <= 0 ) {
+ perror( "read from file" );
+ snd_pcm_close( handle );
+ return;
+}
+close( fd );
+if ( !memcmp( buffer, ".snd", 4 ) ) {
+ idx = (buffer[4]<<24)|(buffer[5]<<16)|(buffer[6]<<8)|(buffer[7]);
+ if ( idx > 128 ) idx = 128;
+ if ( idx > count ) idx = count;
+}
+size = snd_pcm_write( handle, &ero;buffer[ idx ], count - idx );
+printf( "Bytes written %i from %i...\n", size, count - idx );
+snd_pcm_close( handle );
+free( buffer );
+</code></tscreen>
+
+</article>
--- /dev/null
+ Advanced Linux Sound Architecture - Library API
+ Jaroslav Kysela <perex@jcu.cz> with assistance from Alan
+ Robinson
+ v0.0.3, 25 March 1998
+
+ This document describes, in full detail, the Advanced Linux Sound
+ Architecture library API.
+ ______________________________________________________________________
+
+ Table of Contents:
+
+ 1. Introduction
+
+ 2. Error Codes
+
+ 2.1. Error Codes in Detail
+
+ 2.2. Functions
+
+ 2.2.1. const char *snd_strerror( int errnum )
+
+ 3. Control Interface
+
+ 3.1. Low-Level Layer
+
+ 3.1.1. int snd_cards( void )
+
+ 3.1.2. unsigned int snd_cards_mask( void )
+
+ 3.1.3. int snd_ctl_open( void **handle, int card )
+
+ 3.1.4. int snd_ctl_close( void *handle )
+
+ 3.1.5. int snd_ctl_file_descriptor( void *handle )
+
+ 3.1.6. int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info
+ *info )
+
+ 3.1.7. int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t
+ *info )
+
+ 3.1.8. int snd_ctl_pcm_playback_info( void *handle, int dev,
+ snd_pcm_playback_info_t *info )
+
+ 3.1.9. int snd_ctl_pcm_record_info( void *handle, int dev,
+ snd_pcm_record_info_t *info )
+
+ 3.1.10. int snd_ctl_mixer_info( void *handle, int dev,
+ snd_mixer_info_t *info )
+
+ 3.2. Examples
+
+ 4. Mixer Interface
+
+ 4.1. Low-Level Layer
+
+ 4.1.1. int snd_mixer_open( void **handle, int card, int device )
+
+ 4.1.2. int snd_mixer_close( void *handle )
+
+ 4.1.3. int snd_mixer_file_descriptor( void *handle )
+
+ 4.1.4. int snd_mixer_channels( void *handle )
+
+ 4.1.5. int snd_mixer_info( void *handle, snd_mixer_info_t *info )
+
+ 4.1.6. int snd_mixer_channel( void *handle, const char *channel_id )
+
+ 4.1.7. int snd_mixer_exact_mode( void *handle, int enable )
+
+ 4.1.8. int snd_mixer_channel_info( void *handle, int channel,
+ snd_mixer_channel_info_t *info )
+
+ 4.1.9. int snd_mixer_channel_read( void *handle, int channel,
+ snd_mixer_channel_t *data )
+
+ 4.1.10. int snd_mixer_channel_write( void *handle, int channel,
+ snd_mixer_channel_t *data )
+
+ 4.1.11. int snd_mixer_special_read( void *handle, snd_mixer_special_t
+ *special )
+
+ 4.1.12. int snd_mixer_special_write( void *handle, snd_mixer_special_t
+ *special )
+
+ 4.1.13. int snd_mixer_read( void *handle, snd_mixer_callbacks_t
+ *callbacks )
+
+ 4.2. Examples
+
+ 5. Digital Audio (PCM) Interface
+
+ 5.1. Low-Level Layer
+
+ 5.1.1. int snd_pcm_open( void **handle, int card, int device, int
+ mode )
+
+ 5.1.2. int snd_pcm_close( void *handle )
+
+ 5.1.3. int snd_pcm_file_descriptor( void *handle )
+
+ 5.1.4. int snd_pcm_block_mode( void *handle, int enable )
+
+ 5.1.5. int snd_pcm_info( void *handle, snd_pcm_info_t *info )
+
+ 5.1.6. int snd_pcm_playback_info( void *handle,
+ snd_pcm_playback_info_t *info )
+
+ 5.1.7. int snd_pcm_record_info( void *handle, snd_pcm_record_info_t
+ *info )
+
+ 5.1.8. int snd_pcm_playback_format( void *handle, snd_pcm_format_t
+ *format )
+
+ 5.1.9. int snd_pcm_record_format( void *handle, snd_pcm_format_t
+ *format )
+
+ 5.1.10. int snd_pcm_playback_params( void *handle,
+ snd_pcm_playback_params_t *params )
+
+ 5.1.11. int snd_pcm_record_params( void *handle,
+ snd_pcm_record_params_t *params )
+
+ 5.1.12. int snd_pcm_playback_status( void *handle,
+ snd_pcm_playback_status_t *status )
+
+ 5.1.13. int snd_pcm_record_status( void *handle,
+ snd_pcm_record_status_t *status )
+
+ 5.1.14. int snd_pcm_drain_playback( void *handle )
+
+ 5.1.15. int snd_pcm_flush_playback( void *handle )
+
+ 5.1.16. int snd_pcm_flush_record( void *handle )
+
+ 5.1.17. int snd_pcm_playback_time( void *handle, int enable )
+
+ 5.1.18. int snd_pcm_record_time( void *handle, int enable )
+
+ 5.1.19. ssize_t snd_pcm_write( void *handle, const void *buffer,
+ size_t size )
+
+ 5.1.20. ssize_t snd_pcm_read( void *handle, void *buffer, size_t size
+ )
+
+ 5.2. Examples
+ ______________________________________________________________________
+
+ 1\b1.\b. I\bIn\bnt\btr\bro\bod\bdu\buc\bct\bti\bio\bon\bn
+
+ The Advanced Linux Sound Architecture comes with a kernel API &
+ library API. This document describes the library API and how it
+ interfaces with the kernel API. The kernal API will probably never be
+ documented in standalone form.
+
+ Application programmers should use the library API rather than kernel
+ API. The Library offers 100% of the functionally of the kernel API,
+ but add next major improvements in usability, making the application
+ code simpler and better looking. In addition, some of the some
+ fixes/compatibility code in, may be placed in the library code instead
+ of the kernel driver.
+
+ For a complete list of all variables and functions in the API you
+ should look at the following header files:
+
+ 1. /usr/include/sys/soundlib.h
+
+ 2. /usr/include/linux/sound.h
+
+ 3. /usr/include/linux/sounddetect.h
+
+ 2\b2.\b. E\bEr\brr\bro\bor\br C\bCo\bod\bde\bes\bs
+
+ All functions return int (or some sort of signed value). If this value
+ is negative it represents an error code. Codes up to SND_ERROR_BEGIN
+ (500000) represents standard system errors. Codes equal or greather
+ than this value represents sound library API errors. All error codes
+ begin with the prefix _\bS_\bN_\bD_\b__\bE_\bR_\bR_\bO_\bR_\b_.
+
+ 2\b2.\b.1\b1.\b. E\bEr\brr\bro\bor\br C\bCo\bod\bde\bes\bs i\bin\bn D\bDe\bet\bta\bai\bil\bl
+
+ S\bSN\bND\bD_\b_E\bER\bRR\bRO\bOR\bR_\b_U\bUN\bNC\bCO\bOM\bMP\bPA\bAT\bTI\bIB\bBL\bLE\bE_\b_V\bVE\bER\bRS\bSI\bIO\bON\bN (\b(5\b50\b00\b00\b00\b00\b0)\b)
+ This error is caused if the driver uses an incompatible kernel
+ API for this interface and hence the library doesn't know how
+ this API can be used.
+
+ 2\b2.\b.2\b2.\b. F\bFu\bun\bnc\bct\bti\bio\bon\bns\bs
+
+ 2\b2.\b.2\b2.\b.1\b1.\b.
+
+ c\bco\bon\bns\bst\bt c\bch\bha\bar\br *\b*s\bsn\bnd\bd_\b_s\bst\btr\bre\ber\brr\bro\bor\br(\b( i\bin\bnt\bt e\ber\brr\brn\bnu\bum\bm )\b)
+
+ This functions converts error code to a string. Its functionality is
+ the same as the _\bs_\bt_\br_\be_\br_\br_\bo_\br function from the standard C library, but
+ this function returns correct strings for sound error codes, too.
+
+ 3\b3.\b. C\bCo\bon\bnt\btr\bro\bol\bl I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be
+
+ The control interfaces gives application various information about the
+ currently installed sound driver in the system. The interface should
+ be used to detect if another sound interface is present for selected
+ soundcard or, for example, to create a list of devices (MIXER, PCM
+ etc) from which the user can select.
+
+ 3\b3.\b.1\b1.\b. L\bLo\bow\bw-\b-L\bLe\bev\bve\bel\bl L\bLa\bay\bye\ber\br
+
+ 3\b3.\b.1\b1.\b.1\b1.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bca\bar\brd\bds\bs(\b( v\bvo\boi\bid\bd )\b)
+
+ Returns the number of soundcards present in the system, if any.
+ Otherwise it returns a negative value, which maps to an error code.
+ This function will return 0 if no soundcards are detected.
+
+ 3\b3.\b.1\b1.\b.2\b2.\b.
+
+ u\bun\bns\bsi\big\bgn\bne\bed\bd i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bca\bar\brd\bds\bs_\b_m\bma\bas\bsk\bk(\b( v\bvo\boi\bid\bd )\b)
+
+ Returns the bitmap of soundcards present in the system, if any.
+ Otherwise it returns a negative value, which maps to an error code.
+ This function will return 0 if no soundcards are detected. First
+ soundcard is represented with bit 0.
+
+ 3\b3.\b.1\b1.\b.3\b3.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_o\bop\bpe\ben\bn(\b( v\bvo\boi\bid\bd *\b**\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt c\bca\bar\brd\bd )\b)
+
+ Creates a new handle and opens communication with the kernel sound
+ control interface for soundcard number _\bc_\ba_\br_\bd (0-N). The function also
+ checks if protocol is compatible, so as to prevent the use of old
+ programs with a new kernel API. Function returns zero if successful,
+ otherwise an error code is returned.
+
+ 3\b3.\b.1\b1.\b.4\b4.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_c\bcl\blo\bos\bse\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Function frees all resources allocated with control handle and closes
+ the kernel sound control interface. Function returns zero if
+ successful, otherwise it returns an error code.
+
+ 3\b3.\b.1\b1.\b.5\b5.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_f\bfi\bil\ble\be_\b_d\bde\bes\bsc\bcr\bri\bip\bpt\bto\bor\br(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Function returns file descriptor for the kernel sound control
+ interface. This function should be used in very special cases.
+ Function returns a negative error code if some error was encountered.
+ 3\b3.\b.1\b1.\b.6\b6.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_h\bhw\bw_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bst\btr\bru\buc\bct\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_h\bhw\bw_\b_i\bin\bnf\bfo\bo *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the info structure with data about the sound hardware referenced
+ by handle. Function returns zero if successful, otherwise it returns
+ an error code.
+
+ ______________________________________________________________________
+ #define SND_CTL_GCAPS_MIDI 0x0000001 /* driver has MIDI interface */
+
+ #define SND_CTL_LCAPS_SYNTH 0x0000001 /* soundcard has synthesizer */
+ #define SND_CTL_LCAPS_RAWFM 0x0000002 /* soundcard has RAW FM/OPL3 */
+
+ struct snd_ctl_hw_info {
+ unsigned int type; /* type of card - see SND_CARD_TYPE_XXXX */
+ unsigned int gcaps; /* see SND_CTL_GCAPS_XXXX */
+ unsigned int lcaps; /* see SND_CTL_LCAPS_XXXX */
+ unsigned int pcmdevs; /* count of PCM devices (0 to N) */
+ unsigned int mixerdevs; /* count of MIXER devices (0 to N) */
+ unsigned int mididevs; /* count of raw MIDI devices (0 to N) */
+ char id[8]; /* ID of card (user selectable) */
+ char name[80]; /* name/info text about soundcard */
+ unsigned char reserved[128]; /* reserved for future use */
+ };
+
+ ______________________________________________________________________
+
+ 3\b3.\b.1\b1.\b.7\b7.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_p\bpc\bcm\bm_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt d\bde\bev\bv,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the *info structure with data about the PCM device. Function
+ returns zero if successful, otherwise it returns an error code.
+ Details about the snd_pcm_info_t structure are in the D\bDi\big\bgi\bit\bta\bal\bl A\bAu\bud\bdi\bio\bo
+ (\b(P\bPC\bCM\bM)\b) I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be section. The argument _\bd_\be_\bv selects the device number
+ for the soundcard referenced by *handle. Its range is 0 to N where N
+ is _\bs_\bt_\br_\bu_\bc_\bt _\bs_\bn_\bd_\b__\bc_\bt_\bl_\b__\bh_\bw_\b__\bi_\bn_\bf_\bo _\b-_\b> _\bp_\bc_\bm_\bd_\be_\bv_\bs _\b- _\b1. This function will work if
+ the selected PCM device is busy, too. It should be used to collect
+ information about PCM devices without exclusive lock.
+
+ 3\b3.\b.1\b1.\b.8\b8.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt d\bde\bev\bv,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\by-\b-
+ b\bba\bac\bck\bk_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the *info structure with data about the PCM device and playback
+ direction. Function returns zero if successful, otherwise it returns
+ an error code. Details about the snd_pcm_playback_info_t structure
+ are in the D\bDi\big\bgi\bit\bta\bal\bl A\bAu\bud\bdi\bio\bo (\b(P\bPC\bCM\bM)\b) I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be section. The argument _\bd_\be_\bv
+ selects the device number for the soundcard referenced by *handle. Its
+ range is 0 to N where N is _\bs_\bt_\br_\bu_\bc_\bt _\bs_\bn_\bd_\b__\bc_\bt_\bl_\b__\bh_\bw_\b__\bi_\bn_\bf_\bo _\b-_\b> _\bp_\bc_\bm_\bd_\be_\bv_\bs _\b- _\b1.
+ This function will work if the selected PCM device is busy, too. It
+ should be used to collect information about PCM devices without
+ exclusive lock.
+
+ 3\b3.\b.1\b1.\b.9\b9.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt d\bde\bev\bv,\b,
+ s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the *info structure with data about the PCM device and record
+ direction. Function returns zero if successful, otherwise it returns
+ an error code. Details about the snd_pcm_record_info_t structure are
+ in the D\bDi\big\bgi\bit\bta\bal\bl A\bAu\bud\bdi\bio\bo (\b(P\bPC\bCM\bM)\b) I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be section. The argument _\bd_\be_\bv selects
+ the device number for the soundcard referenced by *handle. Its range
+ is 0 to N where N is _\bs_\bt_\br_\bu_\bc_\bt _\bs_\bn_\bd_\b__\bc_\bt_\bl_\b__\bh_\bw_\b__\bi_\bn_\bf_\bo _\b-_\b> _\bp_\bc_\bm_\bd_\be_\bv_\bs _\b- _\b1. This
+ function will work if the selected PCM device is busy, too. It should
+ be used to collect information about PCM devices without exclusive
+ lock.
+
+ 3\b3.\b.1\b1.\b.1\b10\b0.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_c\bct\btl\bl_\b_m\bmi\bix\bxe\ber\br_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt d\bde\bev\bv,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo
+ )\b)
+
+ Fills the *info structure with data about the mixer device. Returns
+ zero if successful, otherwise it returns an error code. Details about
+ the snd_mixer_info_t structure are in the M\bMi\bix\bxe\ber\br I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be section.
+ The argument _\bd_\be_\bv specifies the device number for the appropriate
+ soundcard. Its range is 0 to N where N found from _\bs_\bt_\br_\bu_\bc_\bt
+ _\bs_\bn_\bd_\b__\bc_\bt_\bl_\b__\bh_\bw_\b__\bi_\bn_\bf_\bo _\b-_\b> _\bm_\bi_\bx_\be_\br_\bd_\be_\bv_\bs _\b- _\b1. It should be used to collect
+ information about mixer devices.
+
+ 3\b3.\b.2\b2.\b. E\bEx\bxa\bam\bmp\bpl\ble\bes\bs
+
+ The following example shows how all PCM devices can be detected for
+ the first soundcard (#0) in the system.
+
+ ______________________________________________________________________
+ int card = 0, err;
+ void *handle;
+ stuct snd_ctl_hw_info info;
+
+ if ( (err = snd_ctl_open( &handle, card )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+ }
+ if ( (err = snd_ctl_hw_info( handle, &info )) < 0 ) {
+ fprintf( stderr, "hw info failed: %s\n", snd_strerror( err ) );
+ snd_ctl_close( handle );
+ return;
+ }
+ printf( "Installed PCM devices for card #i: %i\n", card + 1, info.pcmdevs );
+ snd_ctl_close( handle );
+ ______________________________________________________________________
+
+ 4\b4.\b. M\bMi\bix\bxe\ber\br I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be
+
+ The Mixer Interface allows applications to change the volume level of
+ a soundcard's input/output channels in both the linear range (0-100)
+ and in decibels. It also supports features like hardware mute, input
+ sound source, etc.
+
+ 4\b4.\b.1\b1.\b. L\bLo\bow\bw-\b-L\bLe\bev\bve\bel\bl L\bLa\bay\bye\ber\br
+
+ Mixer devices aren't opened exclusively. This allows applications to
+ open a device multiple times with one or more processes.
+ 4\b4.\b.1\b1.\b.1\b1.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_o\bop\bpe\ben\bn(\b( v\bvo\boi\bid\bd *\b**\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt c\bca\bar\brd\bd,\b, i\bin\bnt\bt d\bde\bev\bvi\bic\bce\be )\b)
+
+ Creates new handle and opens a connection to the kernel sound mixer
+ interface for soundcard number _\bc_\ba_\br_\bd (0-N) and mixer device number
+ _\bd_\be_\bv_\bi_\bc_\be. Also checks if protocol is compatible to prevent use of old
+ programs with new kernel API. Function returns zero if successful,
+ otherwise it returns an error code.
+
+ 4\b4.\b.1\b1.\b.2\b2.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bcl\blo\bos\bse\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Frees all resources allocated to the mixer handle and closes its
+ connection to the kernel sound mixer interface. Function returns zero
+ if successful, otherwise it returns an error code.
+
+ 4\b4.\b.1\b1.\b.3\b3.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_f\bfi\bil\ble\be_\b_d\bde\bes\bsc\bcr\bri\bip\bpt\bto\bor\br(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Returns the file descriptor for the connection to the kernel sound
+ mixer interface. This function should be used only in very special
+ cases. Function returns a negative error code if an error was
+ encountered.
+
+ The file descriptor should be used for the _\bs_\be_\bl_\be_\bc_\bt synchronous
+ multiplexer function for deterimeing read direction. Applications
+ should call _\bs_\bn_\bd_\b__\bm_\bi_\bx_\be_\br_\b__\br_\be_\ba_\bd function if some data is waiting to be
+ read. It is recomended that you do this, since it leaves place for
+ this function to handle some new kernel API specifications.
+
+ 4\b4.\b.1\b1.\b.4\b4.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bnn\bne\bel\bls\bs(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Returns the count of mixer channels for appropriate mixer device,
+ otherwise the return value is negative, and signifies an error code.
+ Never returns zero.
+
+ 4\b4.\b.1\b1.\b.5\b5.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the *info structure with information about the mixer associated
+ with *handle. Returns zero if successful, otherwise it returns an
+ error code.
+
+ ______________________________________________________________________
+ #define SND_MIXER_INFO_CAP_EXCL_RECORD 0x00000001
+
+ struct snd_mixer_info {
+ unsigned int type; /* type of soundcard - SND_CARD_TYPE_XXXX */
+ unsigned int channels; /* count of mixer devices */
+ unsigned int caps; /* some flags about this device (SND_MIXER_INFO_CAP_XXXX) */
+ unsigned char id[32]; /* ID of this mixer */
+ unsigned char name[80]; /* name of this device */
+ char reserved[ 32 ]; /* reserved for future use */
+ };
+
+ ______________________________________________________________________
+
+ 4\b4.\b.1\b1.\b.6\b6.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bnn\bne\bel\bl(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, c\bco\bon\bns\bst\bt c\bch\bha\bar\br *\b*c\bch\bha\ban\bnn\bne\bel\bl_\b_i\bid\bd )\b)
+
+ Returns the channel number (index) associated with channel_id (channel
+ name), or returns an error code.
+
+ ______________________________________________________________________
+ #define SND_MIXER_ID_MASTER "Master"
+ #define SND_MIXER_ID_BASS "Bass"
+ #define SND_MIXER_ID_TREBLE "Treble"
+ #define SND_MIXER_ID_SYNTHESIZER "Synth"
+ #define SND_MIXER_ID_SYNTHESIZER1 "Synth 1"
+ #define SND_MIXER_ID_FM "FM"
+ #define SND_MIXER_ID_EFFECT "Effect"
+ #define SND_MIXER_ID_PCM "PCM"
+ #define SND_MIXER_ID_PCM1 "PCM 1"
+ #define SND_MIXER_ID_LINE "Line-In"
+ #define SND_MIXER_ID_MIC "MIC"
+ #define SND_MIXER_ID_CD "CD"
+ #define SND_MIXER_ID_GAIN "Record-Gain"
+ #define SND_MIXER_ID_IGAIN "In-Gain"
+ #define SND_MIXER_ID_OGAIN "Out-Gain"
+ #define SND_MIXER_ID_LOOPBACK "Loopback"
+ #define SND_MIXER_ID_SPEAKER "PC Speaker"
+ #define SND_MIXER_ID_AUXA "Aux A"
+ #define SND_MIXER_ID_AUXB "Aux B"
+ #define SND_MIXER_ID_AUXC "Aux C"
+
+ ______________________________________________________________________
+
+ 4\b4.\b.1\b1.\b.7\b7.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_e\bex\bxa\bac\bct\bt_\b_m\bmo\bod\bde\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt e\ben\bna\bab\bbl\ble\be )\b)
+
+ Turns on or off (by default) exact mode. This mode allows to
+ application set/get volume values in exact range which uses hardware.
+ In non-exact mode is range always from 0 to 100 and conversion to
+ hardware range does driver. Function returns zero if successful,
+ otherwise it returns an error code.
+
+ 4\b4.\b.1\b1.\b.8\b8.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bnn\bne\bel\bl_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt c\bch\bha\ban\bnn\bne\bel\bl,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bn-\b-
+ n\bne\bel\bl_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+ Fills the *info structure. The argument _\bc_\bh_\ba_\bn_\bn_\be_\bl specifies channel (0
+ to N) for which is the info requested. Function returns zero if
+ successful, otherwise it returns an error code.
+
+ ______________________________________________________________________
+ #define SND_MIXER_CINFO_CAP_RECORD 0x00000001
+ #define SND_MIXER_CINFO_CAP_STEREO 0x00000002
+ #define SND_MIXER_CINFO_CAP_MUTE 0x00000004
+ #define SND_MIXER_CINFO_CAP_HWMUTE 0x00000008 /* channel supports hardware mute */
+ #define SND_MIXER_CINFO_CAP_DIGITAL 0x00000010 /* channel does digital (not analog) mixing */
+ #define SND_MIXER_CINOF_CAP_INPUT 0x00000020 /* input channel */
+
+ struct snd_mixer_channel_info {
+ unsigned int channel; /* channel # (filled by application) */
+ unsigned int parent; /* parent channel # or SND_MIXER_PARENT */
+ unsigned char name[12]; /* name of this device */
+ unsigned int caps; /* some flags about this device (SND_MIXER_CINFO_XXXX) */
+ int min; /* min. value when exact mode (or always 0) */
+ int max; /* max. value when exact mode (or always 100) */
+ int min_dB; /* minimum decibel value (*100) */
+ int max_dB; /* maximum decibel value (*100) */
+ int step_dB; /* step decibel value (*100) */
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ 4\b4.\b.1\b1.\b.9\b9.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bnn\bne\bel\bl_\b_r\bre\bea\bad\bd(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt c\bch\bha\ban\bnn\bne\bel\bl,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bn-\b-
+ n\bne\bel\bl_\b_t\bt *\b*d\bda\bat\bta\ba )\b)
+
+ Fills the *data structure. The argument _\bc_\bh_\ba_\bn_\bn_\be_\bl specifies the channel
+ (0 to N) for which is data requested. Function returns zero if
+ successful, otherwise it returns an error code.
+
+ ______________________________________________________________________
+ #define SND_MIXER_FLG_RECORD 0x00000001 /* channel record source flag */
+ #define SND_MIXER_FLG_MUTE_LEFT 0x00010000
+ #define SND_MIXER_FLG_MUTE_RIGHT 0x00020000
+ #define SND_MIXER_FLG_MUTE 0x00030000
+ #define SND_MIXER_FLG_DECIBEL 0x40000000
+ #define SND_MIXER_FLG_FORCE 0x80000000
+
+ struct snd_mixer_channel {
+ unsigned int channel; /* channel # (filled by application) */
+ unsigned int flags; /* some flags to read/write (SND_MIXER_FLG_XXXX) */
+ int left; /* min - max when exact mode (or 0 - 100) */
+ int right; /* min - max when exact mode (or 0 - 100) */
+ int left_dB; /* dB * 100 */
+ int right_dB; /* dB * 100 */
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ S\bSN\bND\bD_\b_M\bMI\bIX\bXE\bER\bR_\b_F\bFL\bLG\bG_\b_R\bRE\bEC\bCO\bOR\bRD\bD
+ Record source flag.
+
+ S\bSN\bND\bD_\b_M\bMI\bIX\bXE\bER\bR_\b_F\bFL\bLG\bG_\b_D\bDE\bEC\bCI\bIB\bBE\bEL\bL
+ If this bit is set, driver set volume from dB variables _\bl_\be_\bf_\bt_\b__\bd_\bB
+ and _\br_\bi_\bg_\bh_\bt_\b__\bd_\bB.
+
+ S\bSN\bND\bD_\b_M\bMI\bIX\bXE\bER\bR_\b_F\bFL\bLG\bG_\b_F\bFO\bOR\bRC\bCE\bE
+ Force set - this bit shouldn't be used from user space. Reserved
+ for kernel.
+
+ 4\b4.\b.1\b1.\b.1\b10\b0.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bnn\bne\bel\bl_\b_w\bwr\bri\bit\bte\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt c\bch\bha\ban\bnn\bne\bel\bl,\b,
+ s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bch\bha\ban\bnn\bne\bel\bl_\b_t\bt *\b*d\bda\bat\bta\ba )\b)
+
+ Writes the *data structure to kernel. The _\bc_\bh_\ba_\bn_\bn_\be_\bl argument specifies
+ the channel (0 to N) for which is data is to be applied. Function
+ returns zero if successful, otherwise it returns an error code. This
+ functions is the opposite of _\bs_\bn_\bd_\b__\bm_\bi_\bx_\be_\br_\b__\bc_\bh_\ba_\bn_\bn_\be_\bl_\b__\br_\be_\ba_\bd.
+
+ 4\b4.\b.1\b1.\b.1\b11\b1.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_s\bsp\bpe\bec\bci\bia\bal\bl_\b_r\bre\bea\bad\bd(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_s\bsp\bpe\bec\bci\bia\bal\bl_\b_t\bt *\b*s\bsp\bpe\bec\bci\bia\bal\bl
+ )\b)
+
+ Not documented...
+
+ 4\b4.\b.1\b1.\b.1\b12\b2.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_s\bsp\bpe\bec\bci\bia\bal\bl_\b_w\bwr\bri\bit\bte\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_s\bsp\bpe\bec\bci\bia\bal\bl_\b_t\bt *\b*s\bsp\bpe\be-\b-
+ c\bci\bia\bal\bl )\b)
+
+ Not documented...
+
+ 4\b4.\b.1\b1.\b.1\b13\b3.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_r\bre\bea\bad\bd(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_m\bmi\bix\bxe\ber\br_\b_c\bca\bal\bll\blb\bba\bac\bck\bks\bs_\b_t\bt *\b*c\bca\bal\bll\blb\bba\bac\bck\bks\bs )\b)
+
+ This function reads and parses data from driver. Parsed actions are
+ returned back to the application using the _\bc_\ba_\bl_\bl_\bb_\ba_\bc_\bk_\bs structure.
+ Applications should not parse data from the driver in standard cases.
+ This function returns immediately after all data is read from driver.
+ Does not block process.
+
+ ______________________________________________________________________
+ typedef struct snd_mixer_callbacks {
+ void *private_data; /* should be used by application */
+ void (*channel_was_changed)( void *private_data, int channel );
+ void *reserved[15]; /* reserved for future use - must be NULL!!! */
+ } snd_mixer_callbacks_t;
+
+ ______________________________________________________________________
+
+ 4\b4.\b.2\b2.\b. E\bEx\bxa\bam\bmp\bpl\ble\bes\bs
+
+ The following example shows installed mixer channels for soundcard #0
+ and mixer device #0 in the system, and also sets the master volume (if
+ present) to 50.
+
+ ______________________________________________________________________
+ int card = 0, device = 0, err;
+ void *handle;
+ snd_mixer_info_t info;
+ snd_mixer_channel_t channel;
+
+ if ( (err = snd_mixer_open( &handle, card, device )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+ }
+ if ( (err = snd_mixer_info( handle, &info )) < 0 ) {
+ fprintf( stderr, "info failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+ printf( "Installed MIXER channels for card #i and device %i: %i\n",
+ card + 1, device, info.channels );
+ master = snd_mixer_channel( handle, SND_MIXER_ID_MASTER );
+ if ( master >= 0 ) {
+ if ( (err = snd_mixer_read( handle, master, &channel )) < 0 ) {
+ fprintf( stderr, "master read failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+ channel -> left = channel -> right = 50;
+ if ( (err = snd_mixer_write( handle, master, &channel )) < 0 ) {
+ fprintf( stderr, "master write failed: %s\n", snd_strerror( err ) );
+ snd_mixer_close( handle );
+ return;
+ }
+ }
+ snd_mixer_close( handle );
+ ______________________________________________________________________
+
+ 5\b5.\b. D\bDi\big\bgi\bit\bta\bal\bl A\bAu\bud\bdi\bio\bo (\b(P\bPC\bCM\bM)\b) I\bIn\bnt\bte\ber\brf\bfa\bac\bce\be
+
+ Digital audio is the most commonly used method of representing sound
+ inside a computer. In this method sound is stored as a sequence of
+ samples taken from the audio signal using constant time intervals. A
+ sample represents volume of the signal at the moment when it was
+ measured. In uncompressed digital audio each sample require one or
+ more bytes of storage. The number of bytes required depends on number
+ of channels (mono, stereo) and sample format (8 or 16 bits, mu-Law,
+ etc.). The length of this interval determines the sampling rate.
+ Commonly used sampling rates are between 8 kHz (telephone quality) and
+ 48 kHz (DAT tapes).
+
+ The physical devices used in digital audio are called the ADC (Analog
+ to Digital Converter) and DAC (Digital to Analog Converter). A device
+ containing both ADC and DAC is commonly known as a codec. The codec
+ device used in a Sound Blaster cards is called a DSP which is somewhat
+ misleading since DSP also stands for Digital Signal Processor (the SB
+ DSP chip is very limited when compared to "true" DSP chips).
+
+ Sampling parameters affect the quality of sound which can be
+ reproduced from the recorded signal. The most fundamental parameter is
+ sampling rate which limits the highest frequency than can be stored.
+ It is well known (Nyquist's Sampling Theorem) that the highest
+ frequency that can be stored in a sampled signal is at most 1/2 of the
+ sampling frequency. For example, a 8 kHz sampling rate permits the
+ recording of a signal in which the highest frequency is less than 4
+ kHz. Higher frequency signals must be filtered out before feeding them
+ to DAC.
+
+ Sample encoding limits the dynamic range of recorded signal
+ (difference between the faintest and the loudest signal that can be
+ recorded). In theory the maximum dynamic range of signal is
+ number_of_bits * 6 dB . This means that 8 bits sampling resolution
+ gives dynamic range of 48 dB and 16 bit resolution gives 96 dB.
+
+ Quality has price. The number of bytes required to store an audio
+ sequence depends on sampling rate, number of channels and sampling
+ resolution. For example just 8000 bytes of memory is required to store
+ one second of sound using 8 kHz/8 bits/mono but 48 kHz/16bit/stereo
+ takes 192 kilobytes. A 64 kbps ISDN channel is required to transfer a
+ 8kHz/8bit/mono audio stream in real time, and about 1.5 Mbps is
+ required for DAT quality (48kHz/16bit/stereo). On the other hand it
+ is possible to store just 5.46 seconds of sound in a megabyte of
+ memory when using 48kHz/16bit/stereo sampling. With 8kHz/8bits/mono it
+ is possible to store 131 seconds of sound using the same amount of
+ memory. It is possible to reduce memory and communication costs by
+ compressing the recorded signal but this is out of the scope of this
+ document.
+
+ 5\b5.\b.1\b1.\b. L\bLo\bow\bw-\b-L\bLe\bev\bve\bel\bl L\bLa\bay\bye\ber\br
+
+ Audio devices are opened exclusively for a selected direction. This
+ doesn't allow open from more than one processes for the same audio
+ device in the same direction, but does allow one open call to each
+ playback direction and second open call to record direction
+ independently. Audio devices return EBUSY error to applications when
+ other applications have already opened the requested direction.
+
+ Low-Level layer supports these formats:
+
+ ______________________________________________________________________
+ #define SND_PCM_SFMT_MU_LAW 0
+ #define SND_PCM_SFMT_A_LAW 1
+ #define SND_PCM_SFMT_IMA_ADPCM 2
+ #define SND_PCM_SFMT_U8 3
+ #define SND_PCM_SFMT_S16_LE 4
+ #define SND_PCM_SFMT_S16_BE 5
+ #define SND_PCM_SFMT_S8 6
+ #define SND_PCM_SFMT_U16_LE 7
+ #define SND_PCM_SFMT_U16_BE 8
+ #define SND_PCM_SFMT_MPEG 9
+ #define SND_PCM_SFMT_GSM 10
+
+ #define SND_PCM_FMT_MU_LAW (1 << SND_PCM_SFMT_MU_LAW)
+ #define SND_PCM_FMT_A_LAW (1 << SND_PCM_SFMT_A_LAW)
+ #define SND_PCM_FMT_IMA_ADPCM (1 << SND_PCM_SFMT_IMA_ADPCM)
+ #define SND_PCM_FMT_U8 (1 << SND_PCM_SFMT_U8)
+ #define SND_PCM_FMT_S16_LE (1 << SND_PCM_SFMT_S16_LE)
+ #define SND_PCM_FMT_S16_BE (1 << SND_PCM_SFMT_S16_BE)
+ #define SND_PCM_FMT_S8 (1 << SND_PCM_SFMT_S8)
+ #define SND_PCM_FMT_U16_LE (1 << SND_PCM_SFMT_U16_LE)
+ #define SND_PCM_FMT_U16_BE (1 << SND_PCM_SFMT_U16_BE)
+ #define SND_PCM_FMT_MPEG (1 << SND_PCM_SFMT_MPEG)
+ #define SND_PCM_FMT_GSM (1 << SND_PCM_SFMT_GSM)
+ ______________________________________________________________________
+
+ Constants with prefix S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_F\bFM\bMT\bT_\b_ are used in info structures and
+ constants with prefix S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_S\bSF\bFM\bMT\bT_\b_ are used in format structures.
+ 5\b5.\b.1\b1.\b.1\b1.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_o\bop\bpe\ben\bn(\b( v\bvo\boi\bid\bd *\b**\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt c\bca\bar\brd\bd,\b, i\bin\bnt\bt d\bde\bev\bvi\bic\bce\be,\b, i\bin\bnt\bt m\bmo\bod\bde\be )\b)
+
+ Creates a new handle and opens a connection to kernel sound audio
+ interface for soundcard number _\bc_\ba_\br_\bd (0-N) and audio device number
+ _\bd_\be_\bv_\bi_\bc_\be. Function also checks if protocol is compatible to prevent use
+ of old programs with a new kernel API. Function returns zero if
+ successful,ful otherwise it returns an error code. Error code -EBUSY
+ is returned when some process ownes the selected direction.
+
+ Default format after opening is mono _\bm_\bu_\b-_\bL_\ba_\bw at 8000Hz. This device can
+ be used directly for playback of standard .au (Sparc) files.
+
+ The following modes should be used for the _\bm_\bo_\bd_\be argument:
+
+ ______________________________________________________________________
+ #define SND_PCM_OPEN_PLAYBACK (O_WRONLY)
+ #define SND_PCM_OPEN_RECORD (O_RDONLY)
+ #define SND_PCM_OPEN_DUPLEX (O_RDWR)
+
+ ______________________________________________________________________
+
+ 5\b5.\b.1\b1.\b.2\b2.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_c\bcl\blo\bos\bse\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Frees all resources allocated with audio handle and closes the
+ connection to the kernel sound audio interface. Function returns zero
+ if successful, otherwise it returns an error code.
+
+ 5\b5.\b.1\b1.\b.3\b3.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_f\bfi\bil\ble\be_\b_d\bde\bes\bsc\bcr\bri\bip\bpt\bto\bor\br(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ Returns the file descriptor of the connection to the kernel sound
+ audio interface. Function returns an error code if an error was
+ encountered.
+
+ The file descriptor should be used for the _\bs_\be_\bl_\be_\bc_\bt synchronous
+ multiplexer function for setting the read direction. Application
+ should call _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\br_\be_\ba_\bd or _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bw_\br_\bi_\bt_\be functions if some data is
+ waiting for reading or a write can be performed. Calling this function
+ is highly recomended, as it leaves a place for the API to things like
+ data conversions, if needed.
+
+ 5\b5.\b.1\b1.\b.4\b4.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_b\bbl\blo\boc\bck\bk_\b_m\bmo\bod\bde\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt e\ben\bna\bab\bbl\ble\be )\b)
+
+ Sets up block (default) or nonblock mode for a handle. Block mode
+ suspends execution of a program when _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\br_\be_\ba_\bd or _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bw_\br_\bi_\bt_\be is
+ called for the time which is needed for the actual playback or record
+ over of the entire buffer. In nonblock mode, programs aren't suspended
+ and the above functions returns immediately with the count of bytes
+ which were read or written by the driver. When used in this way, don't
+ try to use the entire buffer after the call, but instead process the
+ number of bytes returned, and call the function again.
+
+ 5\b5.\b.1\b1.\b.5\b5.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the *info structure with data about the PCM device selected by
+ *handle. Function returns zero if successful, otherwise it returns an
+ error code.
+
+ ______________________________________________________________________
+ #define SND_PCM_INFO_CODEC 0x00000001
+ #define SND_PCM_INFO_DSP SND_PCM_INFO_CODEC
+ #define SND_PCM_INFO_MMAP 0x00000002 /* reserved */
+ #define SND_PCM_INFO_PLAYBACK 0x00000100
+ #define SND_PCM_INFO_RECORD 0x00000200
+ #define SND_PCM_INFO_DUPLEX 0x00000400
+ #define SND_PCM_INFO_DUPLEX_LIMIT 0x00000800 /* rate for playback & record are same */
+
+ struct snd_pcm_info {
+ unsigned int type; /* soundcard type */
+ unsigned int flags; /* see SND_PCM_INFO_XXXX */
+ unsigned char id[32]; /* ID of this PCM device */
+ unsigned char name[80]; /* name of this device */
+ unsigned char reserved[64]; /* reserved for future use */
+ };
+
+ ______________________________________________________________________
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_I\bIN\bNF\bFO\bO_\b_M\bMM\bMA\bAP\bP
+ This flag is reserved and should be never used. It remains for
+ compatibility with Open Sound System driver.
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_I\bIN\bNF\bFO\bO_\b_D\bDU\bUP\bPL\bLE\bEX\bX_\b_L\bLI\bIM\bMI\bIT\bT
+ If this bit is set, rate must be same for playback and record
+ direction.
+
+ 5\b5.\b.1\b1.\b.6\b6.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo
+ )\b)
+
+ Fills the *info structure with data about PCM playback. Function
+ returns zero if successful, otherwise it returns an error code.
+
+ ______________________________________________________________________
+ #define SND_PCM_PINFO_BATCH 0x00000001
+ #define SND_PCM_PINFO_8BITONLY 0x00000002
+ #define SND_PCM_PINFO_16BITONLY 0x00000004
+
+ struct snd_pcm_playback_info {
+ unsigned int flags; /* see SND_PCM_PINFO_XXXX */
+ unsigned int formats; /* supported formats */
+ unsigned int min_rate; /* min rate (in Hz) */
+ unsigned int max_rate; /* max rate (in Hz) */
+ unsigned int min_channels; /* min channels (probably always 1) */
+ unsigned int max_channels; /* max channels */
+ unsigned int buffer_size; /* playback buffer size */
+ unsigned int min_fragment_size; /* min fragment size in bytes */
+ unsigned int max_fragment_size; /* max fragment size in bytes */
+ unsigned int fragment_align; /* align fragment value */
+ unsigned char reserved[64]; /* reserved for future use */
+ };
+
+ ______________________________________________________________________
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_P\bPI\bIN\bNF\bFO\bO_\b_B\bBA\bAT\bTC\bCH\bH
+ Driver implements double buffering with this device. This means
+ that the chip used for data processing has its own memory, and
+ output should be more delayed than if a traditional codec chip
+ is used.
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_P\bPI\bIN\bNF\bFO\bO_\b_8\b8B\bBI\bIT\bTO\bON\bNL\bLY\bY
+ If this bit is set, the driver uses 8-bit format for 16-bit
+ samples and does software conversion. This bit is set on broken
+ SoundBlaster 16/AWE soundcards which can't do full 16-bit
+ duplex. If this bit is set application or highter digital audio
+ layer should do the conversion from 16-bit samples to 8-bit
+ samples rather than making the driver to do it in the kernel.
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_P\bPI\bIN\bNF\bFO\bO_\b_1\b16\b6B\bBI\bIT\bTO\bON\bNL\bLY\bY
+ If this bit is set, driver uses 16-bit format for 8-bit samples
+ and does software conversion. This bit is set on broken
+ SoundBlaster 16/AWE soundcards which can't do full 8-bit duplex.
+ If this bit is set the application or highter digital audio
+ layer should do conversion from 8-bit samples to 16-bit samples
+ rather than making the driver to do it in the kernel.
+
+ 5\b5.\b.1\b1.\b.7\b7.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_i\bin\bnf\bfo\bo(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_i\bin\bnf\bfo\bo_\b_t\bt *\b*i\bin\bnf\bfo\bo )\b)
+
+ Fills the *info structure. Returns zero if successful, otherwise it
+ returns an error code.
+
+ ______________________________________________________________________
+ #define SND_PCM_RINFO_BATCH 0x00000001
+ #define SND_PCM_RINFO_8BITONLY 0x00000002
+ #define SND_PCM_RINFO_16BITONLY 0x00000004
+
+ struct snd_pcm_record_info {
+ unsigned int flags; /* see to SND_PCM_RINFO_XXXX */
+ unsigned int formats; /* supported formats */
+ unsigned int min_rate; /* min rate (in Hz) */
+ unsigned int max_rate; /* max rate (in Hz) */
+ unsigned int min_channels; /* min channels (probably always 1) */
+ unsigned int max_channels; /* max channels */
+ unsigned int buffer_size; /* record buffer size */
+ unsigned int min_fragment_size; /* min fragment size in bytes */
+ unsigned int max_fragment_size; /* max fragment size in bytes */
+ unsigned int fragment_align; /* align fragment value */
+ unsigned char reserved[64]; /* reserved for future... */
+ };
+
+ ______________________________________________________________________
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_P\bPI\bIN\bNF\bFO\bO_\b_B\bBA\bAT\bTC\bCH\bH
+ Driver implements buffering for this device. This means that the
+ chip used for data processing has its own memory and output
+ should be more delayed than if a traditional codec chip is used.
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_P\bPI\bIN\bNF\bFO\bO_\b_8\b8B\bBI\bIT\bTO\bON\bNL\bLY\bY
+ If this bit is set, the device uses 8-bit format for 16-bit
+ samples and does software conversion. This bit is set on broken
+ SoundBlaster 16/AWE soundcards which can't do full 16-bit
+ duplex. If this bit is set the application or highter digital
+ audio layer should do conversion from 16-bit samples to 8-bit
+ samples rather than making the driver to do it in the kernel.
+
+ S\bSN\bND\bD_\b_P\bPC\bCM\bM_\b_P\bPI\bIN\bNF\bFO\bO_\b_1\b16\b6B\bBI\bIT\bTO\bON\bNL\bLY\bY
+ If this bit is set, the device uses a 16-bit format for 8-bit
+ samples and does software conversion. This bit is set on broken
+ SoundBlaster 16/AWE soundcards which can't do full 8-bit duplex.
+ If this bit is set the application or highter digital audio
+ layer should do the conversion from 8-bit samples to 16-bit
+ samples rather than making the driver to do it in the kernel.
+
+ 5\b5.\b.1\b1.\b.8\b8.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_f\bfo\bor\brm\bma\bat\bt(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_f\bfo\bor\brm\bma\bat\bt_\b_t\bt *\b*f\bfo\bor\brm\bma\bat\bt )\b)
+
+ Sets up format, rate (in Hz) and number of channels for playback, in
+ the desired direction. Function returns zero if successful, otherwise
+ it returns an error code.
+
+ ______________________________________________________________________
+ struct snd_pcm_format {
+ unsigned int format; /* SND_PCM_SFMT_XXXX */
+ unsigned int rate; /* rate in Hz */
+ unsigned int channels; /* channels (voices) */
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ 5\b5.\b.1\b1.\b.9\b9.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_f\bfo\bor\brm\bma\bat\bt(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_f\bfo\bor\brm\bma\bat\bt_\b_t\bt *\b*f\bfo\bor\brm\bma\bat\bt )\b)
+
+ Sets up format, rate (in Hz) and number of channels for used for
+ recording in the specified direction. Function returns zero if
+ successful, otherwise it returns an error code.
+
+ ______________________________________________________________________
+ struct snd_pcm_format {
+ unsigned int format; /* SND_PCM_SFMT_XXXX */
+ unsigned int rate; /* rate in Hz */
+ unsigned int channels; /* channels (voices) */
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ 5\b5.\b.1\b1.\b.1\b10\b0.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_p\bpa\bar\bra\bam\bms\bs(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_p\bpa\bar\bra\bam\bms\bs_\b_t\bt
+ *\b*p\bpa\bar\bra\bam\bms\bs )\b)
+
+ Sets various parameters for playback direction. Function returns zero
+ if successful, otherwise it returns an error code.
+
+ ______________________________________________________________________
+ struct snd_pcm_playback_params {
+ int fragment_size;
+ int fragments_max;
+ int fragments_room;
+ unsigned char reserved[16]; /* must be filled with zero */
+ };
+
+ ______________________________________________________________________
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bt_\b_s\bsi\biz\bze\be
+ Requested size of fragment. This value should be aligned for
+ current format (for example to 4 if stereo 16-bit samples are
+ used) or with the _\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\ba_\bl_\bi_\bg_\bn variable from
+ _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bp_\bl_\ba_\by_\bb_\ba_\bc_\bk_\b__\bi_\bn_\bf_\bo_\b__\bt structure. Its range can be from
+ _\bm_\bi_\bn_\b__\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\bs_\bi_\bz_\be to _\bm_\ba_\bx_\b__\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\bs_\bi_\bz_\be.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bts\bs_\b_m\bma\bax\bx
+ Maximum number of fragments in queue for wakeup. This number
+ doesn't counts partly used fragment. If current count of filled
+ playback fragments is greater than this value driver block
+ application or return immediately back if nonblock mode is
+ active.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bts\bs_\b_r\bro\boo\bom\bm
+ Minumum number of fragments writeable for wakeup. This value
+ should be in most cases 1 which means return back to application
+ if at least one fragment is free for playback. This value
+ includes partly used fragments, too.
+
+ 5\b5.\b.1\b1.\b.1\b11\b1.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_p\bpa\bar\bra\bam\bms\bs(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_p\bpa\bar\bra\bam\bms\bs_\b_t\bt
+ *\b*p\bpa\bar\bra\bam\bms\bs )\b)
+ Function sets various parameters for the recording direction. Function
+ returns zero if successful, otherwise it returns an error code.
+
+ ______________________________________________________________________
+ struct snd_pcm_record_params {
+ int fragment_size;
+ int fragments_min;
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bt_\b_s\bsi\biz\bze\be
+ Requested size of fragment. This value should be aligned for
+ current format (for example to 4 if stereo 16-bit samples are
+ used) or set to the _\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\ba_\bl_\bi_\bg_\bn variable from
+ _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bp_\bl_\ba_\by_\bb_\ba_\bc_\bk_\b__\bi_\bn_\bf_\bo_\b__\bt structure. Its range can be from
+ _\bm_\bi_\bn_\b__\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\bs_\bi_\bz_\be to _\bm_\ba_\bx_\b__\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\bs_\bi_\bz_\be.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bts\bs_\b_m\bmi\bin\bn
+ Minimum filled fragments for wakeup. Driver blocks the
+ application (if block mode is selected) until it isn't filled
+ with number of fragments specified with this value.
+
+ 5\b5.\b.1\b1.\b.1\b12\b2.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_s\bst\bta\bat\btu\bus\bs(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_s\bst\bta\bat\btu\bus\bs_\b_t\bt
+ *\b*s\bst\bta\bat\btu\bus\bs )\b)
+
+ Fills the *status structure. Function returns zero if successful,
+ otherwise it returns an error code.
+
+ ______________________________________________________________________
+ struct snd_pcm_playback_status {
+ unsigned int rate;
+ int fragments;
+ int fragment_size;
+ int count;
+ int queue;
+ int underrun;
+ struct timeval time;
+ struct timeval stime;
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ r\bra\bat\bte\be
+ Real playback rate. This value reflects hardware limitations.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bts\bs
+ Currently allocated fragments by the driver for playback
+ direction.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bt_\b_s\bsi\biz\bze\be
+ Current fragment size used by driver for the playback direction.
+
+ c\bco\bou\bun\bnt\bt
+ Count of bytes writeable without blocking.
+
+ q\bqu\bue\beu\bue\be
+ Count of bytes in queue. Note: _\b(_\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\bs _\b* _\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\bs_\bi_\bz_\be_\b) _\b-
+ _\bq_\bu_\be_\bu_\be should not be equal to _\bc_\bo_\bu_\bn_\bt.
+
+ u\bun\bnd\bde\ber\brr\bru\bun\bn
+ This value tells the application the number of underruns since
+ the ast call of _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bp_\bl_\ba_\by_\bb_\ba_\bc_\bk_\b__\bs_\bt_\ba_\bt_\bu_\bs.
+
+ t\bti\bim\bme\be
+ Delay till played of the first sample from next write. This
+ value should be used for time synchronization. Returned value is
+ in the same format as returned from the standard C function
+ _\bg_\be_\bt_\bt_\bi_\bm_\be_\bo_\bf_\bd_\ba_\by_\b( _\b&_\bt_\bi_\bm_\be_\b, _\bN_\bU_\bL_\bL _\b). This variable contains right value
+ only if playback time mode is enabled (look to
+ _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bp_\bl_\ba_\by_\bb_\ba_\bc_\bk_\b__\bt_\bi_\bm_\be function).
+
+ s\bst\bti\bim\bme\be
+ Time when playback was started. This variable contains right
+ value only if playback time mode is enabled (look to
+ _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bp_\bl_\ba_\by_\bb_\ba_\bc_\bk_\b__\bt_\bi_\bm_\be function).
+
+ 5\b5.\b.1\b1.\b.1\b13\b3.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_s\bst\bta\bat\btu\bus\bs(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_s\bst\bta\bat\btu\bus\bs_\b_t\bt *\b*s\bst\bta\ba-\b-
+ t\btu\bus\bs )\b)
+
+ Fills the *status structure. Function returns zero if successful,
+ otherwise it returns an error code.
+
+ ______________________________________________________________________
+ struct snd_pcm_record_status {
+ unsigned int rate;
+ int fragments;
+ int fragment_size;
+ int count;
+ int free;
+ int overrun;
+ struct timeval time;
+ unsigned char reserved[16];
+ };
+
+ ______________________________________________________________________
+
+ r\bra\bat\bte\be
+ Real record rate. This value reflects hardware limitations.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bts\bs
+ Currently allocated fragments by driver for the record
+ direction.
+
+ f\bfr\bra\bag\bgm\bme\ben\bnt\bt_\b_s\bsi\biz\bze\be
+ Current fragment size used by driver for the record direction.
+
+ c\bco\bou\bun\bnt\bt
+ Count of bytes readable without blocking.
+
+ f\bfr\bre\bee\be
+ Count of bytes in buffer still free. Note: _\b(_\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\bs _\b*
+ _\bf_\br_\ba_\bg_\bm_\be_\bn_\bt_\b__\bs_\bi_\bz_\be_\b) _\b- _\bf_\br_\be_\be should not be equal to _\bc_\bo_\bu_\bn_\bt.
+
+ o\bov\bve\ber\brr\bru\bun\bn
+ This value tells application the count of overruns since the
+ last call to _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\br_\be_\bc_\bo_\br_\bd_\b__\bs_\bt_\ba_\bt_\bu_\bs.
+ t\bti\bim\bme\be
+ Lag since the next sample read was recorded. This value should
+ be used for time synchronization. Returned value is in the same
+ format as returned by the from standard C function _\bg_\be_\bt_\bt_\bi_\bm_\be_\bo_\bf_\bd_\ba_\by_\b(
+ _\b&_\bt_\bi_\bm_\be_\b, _\bN_\bU_\bL_\bL _\b). This variable contains right value only if record
+ time mode is enabled (look to _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\br_\be_\bc_\bo_\br_\bd_\b__\bt_\bi_\bm_\be function).
+
+ s\bst\bti\bim\bme\be
+ Time when record was started. This variable contains right value
+ only if record time mode is enabled (look to _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\br_\be_\bc_\bo_\br_\bd_\b__\bt_\bi_\bm_\be
+ function).
+
+ 5\b5.\b.1\b1.\b.1\b14\b4.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_d\bdr\bra\bai\bin\bn_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ This function drain playback buffers immediately. Function returns
+ zero if successful, otherwise it returns an error code.
+
+ 5\b5.\b.1\b1.\b.1\b15\b5.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_f\bfl\blu\bus\bsh\bh_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ This function flushes the playback buffers. It blocks the program
+ while the all the waiting samples in kernel playback buffers are
+ processed. Function returns zero if successful, otherwise it returns
+ an error code.
+
+ 5\b5.\b.1\b1.\b.1\b16\b6.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_f\bfl\blu\bus\bsh\bh_\b_r\bre\bec\bco\bor\brd\bd(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be )\b)
+
+ This function flushes (destroyes) record buffers. Function returns
+ zero if successful, otherwise it returns an error code.
+
+ 5\b5.\b.1\b1.\b.1\b17\b7.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_p\bpl\bla\bay\byb\bba\bac\bck\bk_\b_t\bti\bim\bme\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt e\ben\bna\bab\bbl\ble\be )\b)
+
+ This function enables or disables time mode for playback direction.
+ Time mode allows to application better time synchronization. Function
+ returns zero if successful, otherwise it returns an error code.
+
+ 5\b5.\b.1\b1.\b.1\b18\b8.\b.
+
+ i\bin\bnt\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bec\bco\bor\brd\bd_\b_t\bti\bim\bme\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, i\bin\bnt\bt e\ben\bna\bab\bbl\ble\be )\b)
+
+ This function enables or disables time mode for record direction. Time
+ mode allows to application better time synchronization. Function
+ returns zero if successful, otherwise it returns an error code.
+
+ 5\b5.\b.1\b1.\b.1\b19\b9.\b.
+
+ s\bss\bsi\biz\bze\be_\b_t\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_w\bwr\bri\bit\bte\be(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, c\bco\bon\bns\bst\bt v\bvo\boi\bid\bd *\b*b\bbu\buf\bff\bfe\ber\br,\b, s\bsi\biz\bze\be_\b_t\bt s\bsi\biz\bze\be )\b)
+
+ Writes samples to the device which must be in the proper format
+ specified by the _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\bp_\bl_\ba_\by_\bb_\ba_\bc_\bk_\b__\bf_\bo_\br_\bm_\ba_\bt function. Function returns
+ zero or positive value if playback was successful (value represents
+ count of bytes which was successfuly written to device) or an error
+ value if error occured. Function should suspend process if block mode
+ is active.
+
+ 5\b5.\b.1\b1.\b.2\b20\b0.\b.
+
+ s\bss\bsi\biz\bze\be_\b_t\bt s\bsn\bnd\bd_\b_p\bpc\bcm\bm_\b_r\bre\bea\bad\bd(\b( v\bvo\boi\bid\bd *\b*h\bha\ban\bnd\bdl\ble\be,\b, v\bvo\boi\bid\bd *\b*b\bbu\buf\bff\bfe\ber\br,\b, s\bsi\biz\bze\be_\b_t\bt s\bsi\biz\bze\be )\b)
+
+ Function reads samples from driver. Samples are in format specified by
+ _\bs_\bn_\bd_\b__\bp_\bc_\bm_\b__\br_\be_\bc_\bo_\br_\bd_\b__\bf_\bo_\br_\bm_\ba_\bt function. Function returns zero or positive
+ value if record was success (value represents count of bytes which was
+ successfuly read from device) or negative error value if error
+ occured. Function should suspend process if block mode is active.
+
+ 5\b5.\b.2\b2.\b. E\bEx\bxa\bam\bmp\bpl\ble\bes\bs
+
+ The following example shows how to play the first 512kB from the
+ /tmp/test.au file with soundcard #0 and PCM device #0:
+
+ ______________________________________________________________________
+ int card = 0, device = 0, err, fd, count, size, idx;
+ void *handle;
+ snd_pcm_format_t format;
+ char *buffer;
+
+ buffer = (char *)malloc( 512 * 1024 );
+ if ( !buffer ) return;
+ if ( (err = snd_pcm_open( &handle, card, device, SND_PCM_OPEN_PLAYBACK )) < 0 ) {
+ fprintf( stderr, "open failed: %s\n", snd_strerror( err ) );
+ return;
+ }
+ format.format = SND_PCM_SFMT_MU_LAW;
+ format.rate = 8000;
+ format.voices = 1;
+ if ( (err = snd_pcm_playback_format( handle, &format )) < 0 ) {
+ fprintf( stderr, "format setup failed: %s\n", snd_strerror( err ) );
+ snd_pcm_close( handle );
+ return;
+ }
+ fd = open( "/tmp/test.au" );
+ if ( fd < 0 ) {
+ perror( "open file" );
+ snd_pcm_close( handle );
+ return;
+ }
+ idx = 0;
+ count = read( fd, buffer, 512 * 1024 );
+ if ( count <= 0 ) {
+ perror( "read from file" );
+ snd_pcm_close( handle );
+ return;
+ }
+ close( fd );
+ if ( !memcmp( buffer, ".snd", 4 ) ) {
+ idx = (buffer[4]<<24)|(buffer[5]<<16)|(buffer[6]<<8)|(buffer[7]);
+ if ( idx > 128 ) idx = 128;
+ if ( idx > count ) idx = count;
+ }
+ size = snd_pcm_write( handle, &buffer[ idx ], count - idx );
+ printf( "Bytes written %i from %i...\n", size, count - idx );
+ snd_pcm_close( handle );
+ free( buffer );
+ ______________________________________________________________________
+
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../Makefile.conf
+
+clean:
+ rm -f core .depend *.o *.orig *~
+
--- /dev/null
+/* include/config.h. Generated automatically by configure. */
+/*
+ * Configuration header file for compilation of the ALSA driver
+ */
+
+#define SND_LIB_VERSION "0.0.9"
+/* #undef WORDS_BIGENDIAN */
--- /dev/null
+/*
+ * Configuration header file for compilation of the ALSA driver
+ */
+
+#undef SND_LIB_VERSION
+#undef WORDS_BIGENDIAN
--- /dev/null
+/****************************************************************************
+ * *
+ * control.h *
+ * Control Interface *
+ * *
+ ****************************************************************************/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snd_cards( void );
+unsigned int snd_cards_mask( void );
+int snd_card_name( const char *name );
+
+int snd_ctl_open( void **handle, int card );
+int snd_ctl_close( void *handle );
+int snd_ctl_file_descriptor( void *handle );
+int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info *info );
+int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t *info );
+int snd_ctl_pcm_playback_info( void *handle, int dev, snd_pcm_playback_info_t *info );
+int snd_ctl_pcm_record_info( void *handle, int dev, snd_pcm_record_info_t *info );
+int snd_ctl_mixer_info( void *handle, int dev, snd_mixer_info_t *info );
+
+#ifdef __cplusplus
+}
+#endif
+
--- /dev/null
+/*
+ * error.h
+ */
+
+#define SND_ERROR_BEGIN 500000
+#define SND_ERROR_UNCOMPATIBLE_VERSION (SND_ERROR_BEGIN+0)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *snd_strerror( int errnum );
+
+#ifdef __cplusplus
+}
+#endif
+
--- /dev/null
+/*
+ *
+ */
+
+#endif /* __SOUNDLIB_H */
--- /dev/null
+/*
+ * Application interface library for the ALSA driver
+ * Copyright (c) by Jaroslav Kysela <perex@jcu.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef __SOUNDLIB_H
+#define __SOUNDLIB_H
+
+#include <linux/sound.h>
+#include <unistd.h>
+
--- /dev/null
+/*
+ * Application interface library for the ALSA driver
+ * Copyright (c) 1994/98 by Jaroslav Kysela <perex@jcu.cz>
+ */
+
+#include <asm/byteorder.h>
+#include "../../../include/ultraconf.h"
+
+#ifdef DEBUG
+
+#include <assert.h>
+#define ASSERT( s ) assert( s )
+
+void __snd_dprintf( char *, ... );
+#define snd_dprintf( args... ) __ultra_dprintf( ##args )
+
+#else
+
+#define ASSERT( s ) { ; }
+
+#define snd_dprintf( fmt... ) /* nothing */
+
+#endif
+
+extern inline int snd_p_rint( float x )
+{
+ return (int)( x + (float)0.5 );
+}
+
+/*
+ *
+ */
+
+extern inline void snd_put_byte( unsigned char *array, unsigned int idx, unsigned char b )
+{
+ *(array + idx) = b;
+}
+
+extern inline unsigned char snd_get_byte( unsigned char *array, unsigned int idx )
+{
+ return *(array + idx);
+}
+
+#if defined( __i386__ )
+
+extern inline void snd_put_le_word( unsigned char *array, unsigned int idx, unsigned short w )
+{
+ *(unsigned short *)(array + idx) = w;
+}
+
+extern inline unsigned short snd_get_le_word( unsigned char *array, unsigned int idx )
+{
+ return *(unsigned short *)(array + idx);
+}
+
+extern inline void snd_put_le_dword( unsigned char *array, unsigned int idx, unsigned int dw )
+{
+ *(unsigned int *)(array + idx) = dw;
+}
+
+extern inline unsigned int snd_get_le_dword( unsigned char *array, unsigned int idx )
+{
+ return *(unsigned int *)(array + idx );
+}
+
+#else
+
+#ifndef WORDS_BIGENDIAN
+
+extern inline void snd_put_le_word( unsigned char *array, unsigned int idx, unsigned short w )
+{
+ *(array + idx + 0) = (unsigned char)(w >> 0);
+ *(array + idx + 1) = (unsigned char)(w >> 8);
+}
+
+extern inline unsigned short snd_get_le_word( unsigned char *array, unsigned int idx )
+{
+ return ( *(array + idx + 0) << 0 ) |
+ ( *(array + idx + 1) << 8 );
+}
+
+extern inline void snd_put_le_dword( unsigned char *array, unsigned int idx, unsigned int dw )
+{
+ *(array + idx + 0) = (unsigned char)(dw >> 0);
+ *(array + idx + 1) = (unsigned char)(dw >> 8);
+ *(array + idx + 2) = (unsigned char)(dw >> 16);
+ *(array + idx + 3) = (unsigned char)(dw >> 24);
+}
+
+extern inline unsigned int snd_get_le_dword( unsigned char *array, unsigned int idx )
+{
+ return ( *(array + idx + 0) << 0 ) |
+ ( *(array + idx + 1) << 8 ) |
+ ( *(array + idx + 2) << 16 ) |
+ ( *(array + idx + 3) << 24 );
+}
+
+#else
+
+extern inline void snd_put_le_word( unsigned char *array, unsigned int idx, unsigned short w )
+{
+ *(array + idx + 0) = (unsigned char)(w >> 8);
+ *(array + idx + 1) = (unsigned char)(w >> 0);
+}
+
+extern inline unsigned short snd_get_le_word( unsigned char *array, unsigned int idx )
+{
+ return ( *(array + idx + 0) << 8 ) |
+ ( *(array + idx + 1) << 0 );
+}
+
+extern inline void snd_put_le_dword( unsigned char *array, unsigned int idx, unsigned int dw )
+{
+ *(array + idx + 0) = (unsigned char)(dw >> 24);
+ *(array + idx + 1) = (unsigned char)(dw >> 16);
+ *(array + idx + 2) = (unsigned char)(dw >> 8);
+ *(array + idx + 3) = (unsigned char)(dw >> 0);
+}
+
+extern inline unsigned int snd_get_le_dword( unsigned char *array, unsigned int idx )
+{
+ return ( *(array + idx + 0) << 24 ) |
+ ( *(array + idx + 1) << 16 ) |
+ ( *(array + idx + 2) << 8 ) |
+ ( *(array + idx + 3) << 0 );
+}
+
+#endif
+
+#endif
+
+/*
+ *
+ */
+
+extern inline unsigned char snd_get_unsigned_byte( unsigned char *ptr )
+{
+ return *ptr;
+}
+
+extern inline void snd_put_unsigned_byte( unsigned char *ptr, unsigned char val )
+{
+ *ptr = val;
+}
+
+extern inline unsigned char snd_get_signed_byte( signed char *ptr )
+{
+ return *ptr;
+}
+
+extern inline void snd_put_signed_byte( signed char *ptr, signed char val )
+{
+ *ptr = val;
+}
+
+#if !defined( WORDS_BIGENDIAN ) || defined( __i386__ )
+
+extern inline signed short snd_get_signed_le_word( unsigned char *ptr )
+{
+ return *(signed short *)ptr;
+}
+
+extern inline void snd_put_signed_le_word( unsigned char *ptr, signed short val )
+{
+ *(signed short *)ptr = val;
+}
+
+extern inline unsigned short snd_get_unsigned_le_word( unsigned char *ptr )
+{
+ return *(unsigned short *)ptr;
+}
+
+extern inline void snd_put_unsigned_le_word( unsigned char *ptr, unsigned short val )
+{
+ *(unsigned short *)ptr = val;
+}
+
+extern inline unsigned int snd_get_unsigned_le_dword( unsigned char *ptr )
+{
+ return *(unsigned int *)ptr;
+}
+
+extern inline void snd_put_unsigned_le_dword( unsigned char *ptr, unsigned int val )
+{
+ *(unsigned int *)ptr = val;
+}
+
+#else
+
+extern inline unsigned short snd_get_signed_le_word( unsigned char *ptr )
+{
+ return (signed short)( *ptr + ( *( ptr + 1 ) << 8 );
+}
+
+extern inline void snd_put_signed_le_word( unsigned char *ptr, signed short val )
+{
+ *ptr = (unsigned char)val;
+ *(ptr + 1) = val >> 8;
+}
+
+extern inline unsigned short snd_get_unsigned_le_word( unsigned char *ptr )
+{
+ return (signed short)( *ptr + ( *( ptr + 1 ) << 8 );
+}
+
+extern inline void snd_put_unsigned_le_word( unsigned char *ptr, unsigned short val )
+{
+ *ptr = (unsigned char)val;
+ *(ptr + 1) = val >> 8;
+}
+
+extern inline unsigned int snd_get_unsigned_le_dword( unsigned char *ptr )
+{
+ return (signed int)( *ptr + ( *( ptr + 1 ) << 8 ) +
+ ( *( ptr + 2 ) << 8 ) + ( *( ptr + 3 ) << 8 ) );
+}
+
+extern inline void snd_put_unsigned_le_dword( unsigned char *ptr, unsigned int val )
+{
+ *ptr = (unsigned char)val;
+ *(ptr + 1) = (unsigned char)val >> 8;
+ *(ptr + 2) = (unsigned char)val >> 16;
+ *(ptr + 3) = (unsigned char)val >> 24;
+}
+
+#endif
+
+extern inline unsigned short snd_get_be_word( unsigned char *array, unsigned int idx )
+{
+ return ( *(array + idx + 1) << 0 ) |
+ ( *(array + idx + 0) << 8 );
+}
+
+extern inline unsigned int snd_get_be_dword( unsigned char *array, unsigned int idx )
+{
+ return ( *(array + idx + 3) << 0 ) |
+ ( *(array + idx + 2) << 8 ) |
+ ( *(array + idx + 1) << 16 ) |
+ ( *(array + idx + 0) << 24 );
+}
--- /dev/null
+/****************************************************************************
+ * *
+ * mixer.h *
+ * Mixer Interface *
+ * *
+ ****************************************************************************/
+
+typedef struct snd_mixer_callbacks {
+ void *private_data; /* should be used by application */
+ void (*channel_was_changed)( void *private_data, int channel );
+ void *reserved[15]; /* reserved for future use - must be NULL!!! */
+} snd_mixer_callbacks_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snd_mixer_open( void **handle, int card, int device );
+int snd_mixer_close( void *handle );
+int snd_mixer_file_descriptor( void *handle );
+int snd_mixer_channels( void *handle );
+int snd_mixer_info( void *handle, snd_mixer_info_t *info );
+int snd_mixer_exact_mode( void *handle, int enable );
+int snd_mixer_channel( void *handle, const char *channel_id );
+int snd_mixer_channel_info( void *handle, int channel, snd_mixer_channel_info_t *info );
+int snd_mixer_channel_read( void *handle, int channel, snd_mixer_channel_t *data );
+int snd_mixer_channel_write( void *handle, int channel, snd_mixer_channel_t *data );
+int snd_mixer_special_read( void *handle, snd_mixer_special_t *special );
+int snd_mixer_special_write( void *handle, snd_mixer_special_t *special );
+int snd_mixer_read( void *handle, snd_mixer_callbacks_t *callbacks );
+
+#ifdef __cplusplus
+}
+#endif
+
--- /dev/null
+/****************************************************************************
+ * *
+ * pcm.h *
+ * Digital Audio Interface *
+ * *
+ ****************************************************************************/
+
+#define SND_PCM_OPEN_PLAYBACK (O_WRONLY)
+#define SND_PCM_OPEN_RECORD (O_RDONLY)
+#define SND_PCM_OPEN_DUPLEX (O_RDWR)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snd_pcm_open( void **handle, int card, int device, int mode );
+int snd_pcm_close( void *handle );
+int snd_pcm_file_descriptor( void *handle );
+int snd_pcm_block_mode( void *handle, int enable );
+int snd_pcm_info( void *handle, snd_pcm_info_t *info );
+int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info );
+int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info );
+int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format );
+int snd_pcm_record_format( void *handle, snd_pcm_format_t *format );
+int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params );
+int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params );
+int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status );
+int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status );
+int snd_pcm_drain_playback( void *handle );
+int snd_pcm_flush_playback( void *handle );
+int snd_pcm_flush_record( void *handle );
+int snd_pcm_playback_time( void *handle, int enable );
+int snd_pcm_record_time( void *handle, int enable );
+ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size );
+ssize_t snd_pcm_read( void *handle, void *buffer, size_t size );
+
+#ifdef __cplusplus
+}
+#endif
+
--- /dev/null
+/*
+ * Application interface library for the ALSA driver
+ * Copyright (c) by Jaroslav Kysela <perex@jcu.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#ifndef __SOUNDLIB_H
+#define __SOUNDLIB_H
+
+#include <linux/sound.h>
+#include <unistd.h>
+
+/*
+ * version.h
+ */
+
+#define SOUNDLIB_VERSION_MAJOR 0
+#define SOUNDLIB_VERSION_MINOR 0
+#define SOUNDLIB_VERSION_SUBMINOR 9
+#define SOUNDLIB_VERSION ( ( LIBULTRA_VERSION_MAJOR << 16 ) | ( LIBULTRA_VERSION_MINOR << 8 ) | LIB_ULTRA_VERSION_SUBMINOR )
+
+/*
+ * error.h
+ */
+
+#define SND_ERROR_BEGIN 500000
+#define SND_ERROR_UNCOMPATIBLE_VERSION (SND_ERROR_BEGIN+0)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+const char *snd_strerror( int errnum );
+
+#ifdef __cplusplus
+}
+#endif
+
+/****************************************************************************
+ * *
+ * control.h *
+ * Control Interface *
+ * *
+ ****************************************************************************/
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snd_cards( void );
+unsigned int snd_cards_mask( void );
+int snd_card_name( const char *name );
+
+int snd_ctl_open( void **handle, int card );
+int snd_ctl_close( void *handle );
+int snd_ctl_file_descriptor( void *handle );
+int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info *info );
+int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t *info );
+int snd_ctl_pcm_playback_info( void *handle, int dev, snd_pcm_playback_info_t *info );
+int snd_ctl_pcm_record_info( void *handle, int dev, snd_pcm_record_info_t *info );
+int snd_ctl_mixer_info( void *handle, int dev, snd_mixer_info_t *info );
+
+#ifdef __cplusplus
+}
+#endif
+
+/****************************************************************************
+ * *
+ * mixer.h *
+ * Mixer Interface *
+ * *
+ ****************************************************************************/
+
+typedef struct snd_mixer_callbacks {
+ void *private_data; /* should be used by application */
+ void (*channel_was_changed)( void *private_data, int channel );
+ void *reserved[15]; /* reserved for future use - must be NULL!!! */
+} snd_mixer_callbacks_t;
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snd_mixer_open( void **handle, int card, int device );
+int snd_mixer_close( void *handle );
+int snd_mixer_file_descriptor( void *handle );
+int snd_mixer_channels( void *handle );
+int snd_mixer_info( void *handle, snd_mixer_info_t *info );
+int snd_mixer_exact_mode( void *handle, int enable );
+int snd_mixer_channel( void *handle, const char *channel_id );
+int snd_mixer_channel_info( void *handle, int channel, snd_mixer_channel_info_t *info );
+int snd_mixer_channel_read( void *handle, int channel, snd_mixer_channel_t *data );
+int snd_mixer_channel_write( void *handle, int channel, snd_mixer_channel_t *data );
+int snd_mixer_special_read( void *handle, snd_mixer_special_t *special );
+int snd_mixer_special_write( void *handle, snd_mixer_special_t *special );
+int snd_mixer_read( void *handle, snd_mixer_callbacks_t *callbacks );
+
+#ifdef __cplusplus
+}
+#endif
+
+/****************************************************************************
+ * *
+ * pcm.h *
+ * Digital Audio Interface *
+ * *
+ ****************************************************************************/
+
+#define SND_PCM_OPEN_PLAYBACK (O_WRONLY)
+#define SND_PCM_OPEN_RECORD (O_RDONLY)
+#define SND_PCM_OPEN_DUPLEX (O_RDWR)
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int snd_pcm_open( void **handle, int card, int device, int mode );
+int snd_pcm_close( void *handle );
+int snd_pcm_file_descriptor( void *handle );
+int snd_pcm_block_mode( void *handle, int enable );
+int snd_pcm_info( void *handle, snd_pcm_info_t *info );
+int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info );
+int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info );
+int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format );
+int snd_pcm_record_format( void *handle, snd_pcm_format_t *format );
+int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params );
+int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params );
+int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status );
+int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status );
+int snd_pcm_drain_playback( void *handle );
+int snd_pcm_flush_playback( void *handle );
+int snd_pcm_flush_record( void *handle );
+int snd_pcm_playback_time( void *handle, int enable );
+int snd_pcm_record_time( void *handle, int enable );
+ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size );
+ssize_t snd_pcm_read( void *handle, void *buffer, size_t size );
+
+#ifdef __cplusplus
+}
+#endif
+
+/*
+ *
+ */
+
+#endif /* __SOUNDLIB_H */
--- /dev/null
+/*
+ * version.h
+ */
+
+#define SOUNDLIB_VERSION_MAJOR 0
+#define SOUNDLIB_VERSION_MINOR 0
+#define SOUNDLIB_VERSION_SUBMINOR 9
+#define SOUNDLIB_VERSION ( ( LIBULTRA_VERSION_MAJOR << 16 ) | ( LIBULTRA_VERSION_MINOR << 8 ) | LIB_ULTRA_VERSION_SUBMINOR )
+
--- /dev/null
+/*
+ * version.h
+ */
+
+#define SOUNDLIB_VERSION_MAJOR @SND_LIB_MAJOR@
+#define SOUNDLIB_VERSION_MINOR @SND_LIB_MINOR@
+#define SOUNDLIB_VERSION_SUBMINOR @SND_LIB_SUBMINOR@
+#define SOUNDLIB_VERSION ( ( LIBULTRA_VERSION_MAJOR << 16 ) | ( LIBULTRA_VERSION_MINOR << 8 ) | LIB_ULTRA_VERSION_SUBMINOR )
+
--- /dev/null
+#! /bin/sh
+#
+# install - install a program, script, or datafile
+# This comes from X11R5 (mit/util/scripts/install.sh).
+#
+# Copyright 1991 by the Massachusetts Institute of Technology
+#
+# Permission to use, copy, modify, distribute, and sell this software and its
+# documentation for any purpose is hereby granted without fee, provided that
+# the above copyright notice appear in all copies and that both that
+# copyright notice and this permission notice appear in supporting
+# documentation, and that the name of M.I.T. not be used in advertising or
+# publicity pertaining to distribution of the software without specific,
+# written prior permission. M.I.T. makes no representations about the
+# suitability of this software for any purpose. It is provided "as is"
+# without express or implied warranty.
+#
+# Calling this script install-sh is preferred over install.sh, to prevent
+# `make' implicit rules from creating a file called install from it
+# when there is no Makefile.
+#
+# This script is compatible with the BSD install script, but was written
+# from scratch. It can only install one file at a time, a restriction
+# shared with many OS's install programs.
+
+
+# set DOITPROG to echo to test this script
+
+# Don't use :- since 4.3BSD and earlier shells don't like it.
+doit="${DOITPROG-}"
+
+
+# put in absolute paths if you don't have them in your path; or use env. vars.
+
+mvprog="${MVPROG-mv}"
+cpprog="${CPPROG-cp}"
+chmodprog="${CHMODPROG-chmod}"
+chownprog="${CHOWNPROG-chown}"
+chgrpprog="${CHGRPPROG-chgrp}"
+stripprog="${STRIPPROG-strip}"
+rmprog="${RMPROG-rm}"
+mkdirprog="${MKDIRPROG-mkdir}"
+
+transformbasename=""
+transform_arg=""
+instcmd="$mvprog"
+chmodcmd="$chmodprog 0755"
+chowncmd=""
+chgrpcmd=""
+stripcmd=""
+rmcmd="$rmprog -f"
+mvcmd="$mvprog"
+src=""
+dst=""
+dir_arg=""
+
+while [ x"$1" != x ]; do
+ case $1 in
+ -c) instcmd="$cpprog"
+ shift
+ continue;;
+
+ -d) dir_arg=true
+ shift
+ continue;;
+
+ -m) chmodcmd="$chmodprog $2"
+ shift
+ shift
+ continue;;
+
+ -o) chowncmd="$chownprog $2"
+ shift
+ shift
+ continue;;
+
+ -g) chgrpcmd="$chgrpprog $2"
+ shift
+ shift
+ continue;;
+
+ -s) stripcmd="$stripprog"
+ shift
+ continue;;
+
+ -t=*) transformarg=`echo $1 | sed 's/-t=//'`
+ shift
+ continue;;
+
+ -b=*) transformbasename=`echo $1 | sed 's/-b=//'`
+ shift
+ continue;;
+
+ *) if [ x"$src" = x ]
+ then
+ src=$1
+ else
+ # this colon is to work around a 386BSD /bin/sh bug
+ :
+ dst=$1
+ fi
+ shift
+ continue;;
+ esac
+done
+
+if [ x"$src" = x ]
+then
+ echo "install: no input file specified"
+ exit 1
+else
+ true
+fi
+
+if [ x"$dir_arg" != x ]; then
+ dst=$src
+ src=""
+
+ if [ -d $dst ]; then
+ instcmd=:
+ else
+ instcmd=mkdir
+ fi
+else
+
+# Waiting for this to be detected by the "$instcmd $src $dsttmp" command
+# might cause directories to be created, which would be especially bad
+# if $src (and thus $dsttmp) contains '*'.
+
+ if [ -f $src -o -d $src ]
+ then
+ true
+ else
+ echo "install: $src does not exist"
+ exit 1
+ fi
+
+ if [ x"$dst" = x ]
+ then
+ echo "install: no destination specified"
+ exit 1
+ else
+ true
+ fi
+
+# If destination is a directory, append the input filename; if your system
+# does not like double slashes in filenames, you may need to add some logic
+
+ if [ -d $dst ]
+ then
+ dst="$dst"/`basename $src`
+ else
+ true
+ fi
+fi
+
+## this sed command emulates the dirname command
+dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'`
+
+# Make sure that the destination directory exists.
+# this part is taken from Noah Friedman's mkinstalldirs script
+
+# Skip lots of stat calls in the usual case.
+if [ ! -d "$dstdir" ]; then
+defaultIFS='
+'
+IFS="${IFS-${defaultIFS}}"
+
+oIFS="${IFS}"
+# Some sh's can't handle IFS=/ for some reason.
+IFS='%'
+set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'`
+IFS="${oIFS}"
+
+pathcomp=''
+
+while [ $# -ne 0 ] ; do
+ pathcomp="${pathcomp}${1}"
+ shift
+
+ if [ ! -d "${pathcomp}" ] ;
+ then
+ $mkdirprog "${pathcomp}"
+ else
+ true
+ fi
+
+ pathcomp="${pathcomp}/"
+done
+fi
+
+if [ x"$dir_arg" != x ]
+then
+ $doit $instcmd $dst &&
+
+ if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi &&
+ if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi &&
+ if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi &&
+ if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi
+else
+
+# If we're going to rename the final executable, determine the name now.
+
+ if [ x"$transformarg" = x ]
+ then
+ dstfile=`basename $dst`
+ else
+ dstfile=`basename $dst $transformbasename |
+ sed $transformarg`$transformbasename
+ fi
+
+# don't allow the sed command to completely eliminate the filename
+
+ if [ x"$dstfile" = x ]
+ then
+ dstfile=`basename $dst`
+ else
+ true
+ fi
+
+# Make a temp file name in the proper directory.
+
+ dsttmp=$dstdir/#inst.$$#
+
+# Move or copy the file name to the temp name
+
+ $doit $instcmd $src $dsttmp &&
+
+ trap "rm -f ${dsttmp}" 0 &&
+
+# and set any options; do chmod last to preserve setuid bits
+
+# If any of these fail, we abort the whole thing. If we want to
+# ignore errors from any of these, just make sure not to ignore
+# errors from the above "$doit $instcmd $src $dsttmp" command.
+
+ if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi &&
+ if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi &&
+ if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi &&
+ if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi &&
+
+# Now rename the file to the real destination.
+
+ $doit $rmcmd -f $dstdir/$dstfile &&
+ $doit $mvcmd $dsttmp $dstdir/$dstfile
+
+fi &&
+
+
+exit 0
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../Makefile.conf
+
+TARGET=../lib/libsound.a
+STARGET=../lib/libsound.so
+STARGETX=../lib/libsound.so.$(SND_LIB_VERSION)
+STARGETO=../lib/libsound.so.$(SND_LIB_MAJOR)
+TARGETS=$(TARGET) $(STARGET)
+
+STATIC_LIBS= control/libcontrol.a \
+ mixer/libmixer.a \
+ pcm/libpcm.a
+DYNAMIC_LIBS= control/libcontrol.Sa \
+ mixer/libmixer.Sa \
+ pcm/libpcm.Sa
+
+OBJECTS=error.o
+SOBJECTS=error.So
+
+.SUFFIXES:
+.SUFFIXES: .c .s .S .o .So .a .Sa
+
+.c.o:
+ $(CC) $(COPTS) $(INCLUDE) -c -o $*.o $<
+.c.So:
+ $(CC) $(COPTS) $(INCLUDE) -fPIC -c -o $*.So $<
+
+all: $(TARGETS)
+
+$(TARGET): .depend $(OBJECTS) $(STATIC_LIBS)
+ rm -f ../lib/libsound.a
+ $(LINKER) -r -o $(TARGET) $(STATIC_LIBS) $(OBJECTS)
+
+$(STARGET): .depend $(SOBJECTS) $(DYNAMIC_LIBS)
+ rm -f ../lib/libsound*.so*
+ $(CC) -shared -Wl,-soname,libsound.so.$(SND_LIB_MAJOR) $(DYNAMIC_LIBS) $(SOBJECTS) -o $(STARGETX)
+ ln -s libsound.so.$(SND_LIB_VERSION) $(STARGET)
+ ln -s libsound.so.$(SND_LIB_VERSION) $(STARGETO)
+
+control/libcontrol.a:
+ $(MAKE) -C control
+control/libcontrol.sa:
+ $(MAKE) -C control
+
+mixer/libmixer.a:
+ $(MAKE) -C mixer
+mixer/libmixer.sa:
+ $(MAKE) -C mixer
+
+pcm/libpcm.a:
+ $(MAKE) -C pcm
+pcm/libpcm.sa:
+ $(MAKE) -C pcm
+
+clean:
+ $(MAKE) -C control clean
+ $(MAKE) -C pcm clean
+ $(MAKE) -C mixer clean
+ rm -f core .depend *.o *.So *.orig *~
+ rm -f ../lib/libsound.*
+
+.depend:
+ $(CPP) $(COPTS) $(INCLUDE) -M *.c > .depend
+
+#
+# include a dependency file if one exists
+#
+ifeq (.depend,$(wildcard .depend))
+include .depend
+endif
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../../Makefile.conf
+
+TARGET=libcontrol.a
+STARGET=libcontrol.Sa
+OBJECTS=cards.o control.o
+SOBJECTS=cards.So control.So
+TARGETS=$(TARGET) $(STARGET)
+
+.SUFFIXES:
+.SUFFIXES: .c .s .S .o .So .a .Sa
+
+.c.o:
+ $(CC) $(COPTS) $(INCLUDE) -c -o $*.o $<
+.c.So:
+ $(CC) $(COPTS) $(INCLUDE) -fPIC -c -o $*.So $<
+
+
+all: $(TARGETS)
+
+$(TARGET): .depend $(OBJECTS)
+ $(LINKER) -r -o $@ $(OBJECTS)
+
+$(STARGET): .depend $(SOBJECTS)
+ $(LINKER) -r -o $@ $(SOBJECTS)
+
+clean:
+ rm -f core .depend *.o *.So *.a *.Sa *.orig *~
+
+.depend:
+ $(CPP) $(COPTS) $(INCLUDE) -M *.c > .depend
+
+#
+# include a dependency file if one exists
+#
+ifeq (.depend,$(wildcard .depend))
+include .depend
+endif
--- /dev/null
+/*
+ * Control Interface - main file
+ * Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "soundlib.h"
+
+#define SND_FILE_CONTROL "/dev/sndcontrol%i"
+
+int snd_cards( void )
+{
+ int idx, count;
+ unsigned int mask;
+
+ mask = snd_cards_mask();
+ for ( idx = 0, count = 0; idx < SND_CARDS; idx++ ) {
+ if ( mask & (1 << idx) ) count++;
+ }
+ return count;
+}
+
+/*
+ * this routine uses very ugly method...
+ * need to do...
+ */
+
+unsigned int snd_cards_mask( void )
+{
+ int fd, idx;
+ unsigned int mask;
+ char filename[32];
+
+ for ( idx = 0, mask = 0; idx < SND_CARDS; idx++ ) {
+ sprintf( filename, SND_FILE_CONTROL, idx );
+ if ( (fd = open( filename, O_RDWR )) < 0 ) continue;
+ close( fd );
+ mask |= 1 << idx;
+ }
+ return mask;
+}
+
+int snd_card_name( const char *string )
+{
+ int card, cards;
+ void *handle;
+ struct snd_ctl_hw_info info;
+
+ cards = snd_cards();
+ if ( cards <= 0 ) return -ENODEV;
+ if ( !string ) return -EINVAL;
+ if ( (isdigit( *string ) && *(string+1) == 0) ||
+ (isdigit( *string ) && isdigit( *(string+1) ) && *(string+2) == 0) ) {
+ sscanf( string, "%i", &card );
+ card--;
+ if ( card < 0 || card >= cards )
+ return -EINVAL;
+ return card;
+ }
+ for ( card = 0; card < cards; card++ ) {
+ if ( snd_ctl_open( &handle, card ) < 0 )
+ continue;
+ if ( snd_ctl_hw_info( handle, &info ) < 0 ) {
+ snd_ctl_close( handle );
+ continue;
+ }
+ snd_ctl_close( handle );
+ if ( !strcmp( info.id, string ) )
+ return card;
+ }
+ return -ENODEV;
+}
--- /dev/null
+/*
+ * Control Interface - main file
+ * Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "soundlib.h"
+
+#define SND_FILE_CONTROL "/dev/sndcontrol%i"
+#define SND_CTL_VERSION_MAX SND_PROTOCOL_VERSION( 1, 0, 0 )
+
+typedef struct {
+ int card;
+ int fd;
+} snd_ctl_t;
+
+int snd_ctl_open( void **handle, int card )
+{
+ int fd, ver;
+ char filename[32];
+ snd_ctl_t *ctl;
+
+ *handle = NULL;
+ if ( card < 0 || card >= SND_CARDS ) return -EINVAL;
+ sprintf( filename, SND_FILE_CONTROL, card );
+ if ( (fd = open( filename, O_RDWR )) < 0 ) return -errno;
+ if ( ioctl( fd, SND_CTL_IOCTL_PVERSION, &ver ) < 0 ) {
+ close( fd );
+ return -errno;
+ }
+ if ( ver > SND_CTL_VERSION_MAX ) return -SND_ERROR_UNCOMPATIBLE_VERSION;
+ ctl = (snd_ctl_t *)calloc( 1, sizeof( snd_ctl_t ) );
+ if ( ctl == NULL ) {
+ close( fd );
+ return -ENOMEM;
+ }
+ ctl -> card = card;
+ ctl -> fd = fd;
+ *handle = ctl;
+ return 0;
+}
+
+int snd_ctl_close( void *handle )
+{
+ snd_ctl_t *ctl;
+ int res;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ res = close( ctl -> fd ) < 0 ? -errno : 0;
+ free( ctl );
+ return res;
+}
+
+int snd_ctl_file_descriptor( void *handle )
+{
+ snd_ctl_t *ctl;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ return ctl -> fd;
+}
+
+int snd_ctl_hw_info( void *handle, struct snd_ctl_hw_info *info )
+{
+ snd_ctl_t *ctl;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_HW_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_ctl_pcm_info( void *handle, int dev, snd_pcm_info_t *info )
+{
+ snd_ctl_t *ctl;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_PCM_DEVICE, &dev ) < 0 )
+ return -errno;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_PCM_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_ctl_pcm_playback_info( void *handle, int dev, snd_pcm_playback_info_t *info )
+{
+ snd_ctl_t *ctl;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_PCM_DEVICE, &dev ) < 0 )
+ return -errno;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_PCM_PLAYBACK_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_ctl_pcm_record_info( void *handle, int dev, snd_pcm_record_info_t *info )
+{
+ snd_ctl_t *ctl;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_PCM_DEVICE, &dev ) < 0 )
+ return -errno;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_PCM_RECORD_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_ctl_mixer_info( void *handle, int dev, snd_mixer_info_t *info )
+{
+ snd_ctl_t *ctl;
+
+ ctl = (snd_ctl_t *)handle;
+ if ( !ctl ) return -EINVAL;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_MIXER_DEVICE, &dev ) < 0 )
+ return -errno;
+ if ( ioctl( ctl -> fd, SND_CTL_IOCTL_MIXER_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
--- /dev/null
+/*
+ * Error Routines
+ * Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
+ *
+ * snd_strerror routine needs to be recoded for locale support
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "soundlib.h"
+
+static const char *snd_error_codes[] = {
+ "Sound protocol isn't compatible"
+};
+
+const char *snd_strerror( int errnum )
+{
+ if ( errnum < 0 ) errnum = -errnum;
+ if ( errnum < SND_ERROR_BEGIN )
+ return (const char *)strerror( errnum );
+ errnum -= SND_ERROR_BEGIN;
+ if ( errnum >= sizeof( snd_error_codes ) / sizeof( const char * ) )
+ return "Unknown error";
+ return snd_error_codes[ errnum ];
+}
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../../Makefile.conf
+
+TARGET=libmixer.a
+STARGET=libmixer.Sa
+OBJECTS=mixer.o
+SOBJECTS=mixer.So
+TARGETS=$(TARGET) $(STARGET)
+
+.SUFFIXES:
+.SUFFIXES: .c .s .S .o .So .a .Sa
+
+.c.o:
+ $(CC) $(COPTS) $(INCLUDE) -c -o $*.o $<
+.c.So:
+ $(CC) $(COPTS) $(INCLUDE) -fPIC -c -o $*.So $<
+
+all: $(TARGETS)
+
+$(TARGET): .depend $(OBJECTS)
+ $(LINKER) -r -o $@ $(OBJECTS)
+
+$(STARGET): .depend $(SOBJECTS)
+ $(LINKER) -r -o $@ $(SOBJECTS)
+
+clean:
+ rm -f core .depend *.o *.So *.a *.Sa *.orig *~
+
+.depend:
+ $(CPP) $(COPTS) $(INCLUDE) -M *.c > .depend
+
+#
+# include a dependency file if one exists
+#
+ifeq (.depend,$(wildcard .depend))
+include .depend
+endif
--- /dev/null
+/*
+ * Mixer Interface - main file
+ * Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
+ *
+ *
+ * This library is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Library 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 Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "soundlib.h"
+
+#define SND_FILE_MIXER "/dev/sndmixer%i%i"
+#define SND_CTL_VERSION_MAX SND_PROTOCOL_VERSION( 1, 0, 0 )
+
+typedef struct {
+ int card;
+ int device;
+ int fd;
+} snd_mixer_t;
+
+int snd_mixer_open( void **handle, int card, int device )
+{
+ int fd, ver;
+ char filename[32];
+ snd_mixer_t *mixer;
+
+ *handle = NULL;
+ if ( card < 0 || card >= SND_CARDS ) return -EINVAL;
+ sprintf( filename, SND_FILE_MIXER, card, device );
+ if ( (fd = open( filename, O_RDWR )) < 0 ) return -errno;
+ if ( ioctl( fd, SND_MIXER_IOCTL_PVERSION, &ver ) < 0 ) {
+ close( fd );
+ return -errno;
+ }
+ if ( ver > SND_CTL_VERSION_MAX ) return -SND_ERROR_UNCOMPATIBLE_VERSION;
+ mixer = (snd_mixer_t *)calloc( 1, sizeof( snd_mixer_t ) );
+ if ( mixer == NULL ) {
+ close( fd );
+ return -ENOMEM;
+ }
+ mixer -> card = card;
+ mixer -> device = device;
+ mixer -> fd = fd;
+ *handle = mixer;
+ return 0;
+}
+
+int snd_mixer_close( void *handle )
+{
+ snd_mixer_t *mixer;
+ int res;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ res = close( mixer -> fd ) < 0 ? -errno : 0;
+ free( mixer );
+ return res;
+}
+
+int snd_mixer_file_descriptor( void *handle )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ return mixer -> fd;
+}
+
+int snd_mixer_channels( void *handle )
+{
+ snd_mixer_t *mixer;
+ int result;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_CHANNELS, &result ) < 0 )
+ return -errno;
+ return result;
+}
+
+int snd_mixer_info( void *handle, snd_mixer_info_t *info )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_exact_mode( void *handle, int enable )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_EXACT, &enable ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_channel( void *handle, const char *channel_id )
+{
+ snd_mixer_t *mixer;
+ snd_mixer_channel_info_t info;
+ int idx, channels, err;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ /* bellow implementation isn't optimized for speed */
+ /* info about channels should be cached in the snd_mixer_t structure */
+ if ( (channels = snd_mixer_channels( handle )) < 0 )
+ return channels;
+ for ( idx = 0; idx < channels; idx++ ) {
+ if ( (err = snd_mixer_channel_info( handle, idx, &info )) < 0 )
+ return err;
+ if ( !strncmp( channel_id, info.name, sizeof( info.name ) ) )
+ return idx;
+ }
+ return -EINVAL;
+}
+
+int snd_mixer_channel_info( void *handle, int channel, snd_mixer_channel_info_t *info )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ info -> channel = channel;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_CHANNEL_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_channel_read( void *handle, int channel, snd_mixer_channel_t *data )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ data -> channel = channel;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_CHANNEL_READ, data ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_channel_write( void *handle, int channel, snd_mixer_channel_t *data )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ data -> channel = channel;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_CHANNEL_WRITE, data ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_special_read( void *handle, snd_mixer_special_t *special )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_SPECIAL_READ, special ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_special_write( void *handle, snd_mixer_special_t *special )
+{
+ snd_mixer_t *mixer;
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ if ( ioctl( mixer -> fd, SND_MIXER_IOCTL_SPECIAL_WRITE, special ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_mixer_read( void *handle, snd_mixer_callbacks_t *callbacks )
+{
+ snd_mixer_t *mixer;
+ int idx, result, count;
+ unsigned int cmd, tmp;
+ unsigned char buffer[ 64 ];
+
+ mixer = (snd_mixer_t *)handle;
+ if ( !mixer ) return -EINVAL;
+ count = 0;
+ while ( (result = read( mixer -> fd, &buffer, sizeof( buffer ))) > 0 ) {
+ if ( result & 7 ) return -EIO;
+ if ( !callbacks ) continue;
+ for ( idx = 0; idx < result; idx += 8 ) {
+ cmd = *(unsigned int *)&buffer[ idx ];
+ tmp = *(unsigned int *)&buffer[ idx + 4 ];
+ if ( cmd == 0 && callbacks -> channel_was_changed ) {
+ callbacks -> channel_was_changed( callbacks -> private_data, (int)tmp );
+ }
+ }
+ count += result >> 3; /* return only number of changes */
+ }
+ return result >= 0 ? count : -errno;
+}
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../../Makefile.conf
+
+TARGET=libpcm.a
+STARGET=libpcm.Sa
+OBJECTS=pcm.o
+SOBJECTS=pcm.So
+TARGETS=$(TARGET) $(STARGET)
+
+.SUFFIXES: .c .s .S .o .So .a .Sa
+
+.c.o:
+ $(CC) $(COPTS) $(INCLUDE) -c -o $*.o $<
+.c.So:
+ $(CC) $(COPTS) $(INCLUDE) -fPIC -c -o $*.So $<
+
+all: $(TARGETS)
+
+$(TARGET): .depend $(OBJECTS)
+ $(LINKER) -r -o $@ $(OBJECTS)
+
+$(STARGET): .depend $(SOBJECTS)
+ $(LINKER) -r -o $@ $(SOBJECTS)
+
+clean:
+ rm -f core .depend *.o *.So *.a *.Sa *.orig *~
+
+.depend:
+ $(CPP) $(COPTS) $(INCLUDE) -M *.c > .depend
+
+#
+# include a dependency file if one exists
+#
+ifeq (.depend,$(wildcard .depend))
+include .depend
+endif
--- /dev/null
+/*
+ * PCM Interface - main file
+ * Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include "soundlib.h"
+
+#define SND_FILE_PCM "/dev/sndpcm%i%i"
+#define SND_CTL_VERSION_MAX SND_PROTOCOL_VERSION( 1, 0, 0 )
+
+typedef struct {
+ int card;
+ int device;
+ int fd;
+} snd_pcm_t;
+
+int snd_pcm_open( void **handle, int card, int device, int mode )
+{
+ int fd, ver;
+ char filename[32];
+ snd_pcm_t *pcm;
+
+ *handle = NULL;
+ if ( card < 0 || card >= SND_CARDS ) return -EINVAL;
+ sprintf( filename, SND_FILE_PCM, card, device );
+ if ( (fd = open( filename, mode )) < 0 ) return -errno;
+ if ( ioctl( fd, SND_PCM_IOCTL_PVERSION, &ver ) < 0 ) {
+ close( fd );
+ return -errno;
+ }
+ if ( ver > SND_CTL_VERSION_MAX ) return -SND_ERROR_UNCOMPATIBLE_VERSION;
+ pcm = (snd_pcm_t *)calloc( 1, sizeof( snd_pcm_t ) );
+ if ( pcm == NULL ) {
+ close( fd );
+ return -ENOMEM;
+ }
+ pcm -> card = card;
+ pcm -> device = device;
+ pcm -> fd = fd;
+ *handle = pcm;
+ return 0;
+}
+
+int snd_pcm_close( void *handle )
+{
+ snd_pcm_t *pcm;
+ int res;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ res = close( pcm -> fd ) < 0 ? -errno : 0;
+ free( pcm );
+ return res;
+}
+
+int snd_pcm_file_descriptor( void *handle )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ return pcm -> fd;
+}
+
+int snd_pcm_block_mode( void *handle, int enable )
+{
+ snd_pcm_t *pcm;
+ long flags;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( fcntl( pcm -> fd, F_GETFL, &flags ) < 0 )
+ return -errno;
+ if ( enable )
+ flags |= O_NONBLOCK;
+ else
+ flags &= ~O_NONBLOCK;
+ if ( fcntl( pcm -> fd, F_SETFL, &flags ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_info( void *handle, snd_pcm_info_t *info )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_playback_info( void *handle, snd_pcm_playback_info_t *info )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_record_info( void *handle, snd_pcm_record_info_t *info )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_INFO, info ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_playback_format( void *handle, snd_pcm_format_t *format )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_FORMAT, format ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_record_format( void *handle, snd_pcm_format_t *format )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_FORMAT, format ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_playback_params( void *handle, snd_pcm_playback_params_t *params )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_PARAMS, params ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_record_params( void *handle, snd_pcm_record_params_t *params )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_PARAMS, params ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_playback_status( void *handle, snd_pcm_playback_status_t *status )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_STATUS, status ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_record_status( void *handle, snd_pcm_record_status_t *status )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_STATUS, status ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_drain_playback( void *handle )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_DRAIN_PLAYBACK ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_flush_playback( void *handle )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_FLUSH_PLAYBACK ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_flush_record( void *handle )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_FLUSH_RECORD ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_playback_time( void *handle, int enable )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_PLAYBACK_TIME, &enable ) < 0 )
+ return -errno;
+ return 0;
+}
+
+int snd_pcm_record_time( void *handle, int enable )
+{
+ snd_pcm_t *pcm;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ if ( ioctl( pcm -> fd, SND_PCM_IOCTL_RECORD_TIME, &enable ) < 0 )
+ return -errno;
+ return 0;
+}
+
+ssize_t snd_pcm_write( void *handle, const void *buffer, size_t size )
+{
+ snd_pcm_t *pcm;
+ ssize_t result;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ result = write( pcm -> fd, buffer, size );
+ if ( result < 0 ) return -errno;
+ return result;
+}
+
+ssize_t snd_pcm_read( void *handle, void *buffer, size_t size )
+{
+ snd_pcm_t *pcm;
+ ssize_t result;
+
+ pcm = (snd_pcm_t *)handle;
+ if ( !pcm ) return -EINVAL;
+ result = read( pcm -> fd, buffer, size );
+ if ( result < 0 ) return -errno;
+ return result;
+}
--- /dev/null
+CC = gcc
+CFLAGS = -static -O2 -g -Wall -pipe
+TARGETS = control mixer
+LIB = -L../lib -lsound
+
+all: $(TARGETS)
+
+control: control.c
+ $(CC) $(CFLAGS) $(LIB) -o control control.c
+
+mixer: mixer.c
+ $(CC) $(CFLAGS) $(LIB) -o mixer mixer.c
+
+clean:
+ rm -f *.o $(TARGETS) *~
--- /dev/null
+#include <stdio.h>
+#include <string.h>
+#include "../include/soundlib.h"
+
+void main( void )
+{
+ int idx, idx1, cards, err;
+ void *handle;
+ struct snd_ctl_hw_info info;
+ snd_pcm_info_t pcminfo;
+ snd_mixer_info_t mixerinfo;
+ char str[128];
+
+ cards = snd_cards();
+ printf( "Detected %i soundcard%s...\n", cards, cards > 1 ? "s" : "" );
+ if ( cards <= 0 ) {
+ printf( "Giving up...\n" );
+ return;
+ }
+ for ( idx = 0; idx < cards; idx++ ) {
+ if ( (err = snd_ctl_open( &handle, idx )) < 0 ) {
+ printf( "Open error: %s\n", snd_strerror( err ) );
+ continue;
+ }
+ if ( (err = snd_ctl_hw_info( handle, &info )) < 0 ) {
+ printf( "HW info error: %s\n", snd_strerror( err ) );
+ continue;
+ }
+ printf( "Soundcard #%i:\n", idx + 1 );
+ printf( " type - %i\n", info.type );
+ printf( " gcaps - 0x%x\n", info.gcaps );
+ printf( " lcaps - 0x%x\n", info.lcaps );
+ printf( " pcm devs - 0x%x\n", info.pcmdevs );
+ printf( " mixer devs - 0x%x\n", info.mixerdevs );
+ printf( " midi devs - 0x%x\n", info.mididevs );
+ memset( str, 0, sizeof( str ) );
+ strncpy( str, info.id, sizeof( info.id ) );
+ printf( " id - '%s'\n", str );
+ printf( " abbreviation - '%s'\n", info.abbreviation );
+ printf( " name - '%s'\n", info.name );
+ printf( " longname - '%s'\n", info.longname );
+ for ( idx1 = 0; idx1 < info.pcmdevs; idx1++ ) {
+ printf( "PCM info, device #%i:\n", idx1 );
+ if ( (err = snd_ctl_pcm_info( handle, idx1, &pcminfo )) < 0 ) {
+ printf( " PCM info error: %s\n", snd_strerror( err ) );
+ continue;
+ }
+ printf( " type - %i\n", pcminfo.type );
+ printf( " flags - 0x%x\n", pcminfo.flags );
+ printf( " id - '%s'\n", pcminfo.id );
+ printf( " name - '%s'\n", pcminfo.name );
+ }
+ for ( idx1 = 0; idx1 < info.mixerdevs; idx1++ ) {
+ printf( "MIXER info, device #%i:\n", idx1 );
+ if ( (err = snd_ctl_mixer_info( handle, idx1, &mixerinfo )) < 0 ) {
+ printf( " MIXER info error: %s\n", snd_strerror( err ) );
+ continue;
+ }
+ printf( " type - %i\n", mixerinfo.type );
+ printf( " channels - %i\n", mixerinfo.channels );
+ printf( " caps - 0x%x\n", mixerinfo.caps );
+ printf( " id - '%s'\n", mixerinfo.id );
+ printf( " name - '%s'\n", mixerinfo.name );
+ }
+ snd_ctl_close( handle );
+ }
+}
--- /dev/null
+#include <stdio.h>
+#include <string.h>
+#include "../include/soundlib.h"
+
+static void mixer_test( int card, int device )
+{
+ int err, channels;
+ void *handle;
+ snd_mixer_info_t info;
+
+ if ( (err = snd_mixer_open( &handle, card, device)) < 0 ) {
+ printf( "Mixer open error: %s\n", snd_strerror( err ) );
+ return;
+ }
+ printf( "Mixer %i/%i open ok...\n", card, device );
+ channels = snd_mixer_channels( handle );
+ if ( channels < 0 ) {
+ printf( "Mixer channels error: %s\n", snd_strerror( channels ) );
+ return;
+ }
+ printf( " Mixer have %i channel%s.\n", channels, channels > 1 ? "s" : "" );
+ if ( (err = snd_mixer_info( handle, &info )) < 0 ) {
+ printf( "Mixer info error: %s\n", snd_strerror( err ) );
+ return;
+ }
+ printf( " Info:\n" );
+ printf( " type - %i\n", info.type );
+ printf( " channels - %i\n", info.channels );
+ printf( " caps - 0x%x\n", info.caps );
+ printf( " id - '%s'\n", info.id );
+ printf( " name - '%s'\n", info.name );
+ snd_mixer_close( handle );
+}
+
+void main( void )
+{
+ int idx, idx1, cards, err;
+ void *handle;
+ struct snd_ctl_hw_info info;
+
+ cards = snd_cards();
+ printf( "Detected %i soundcard%s...\n", cards, cards > 1 ? "s" : "" );
+ if ( cards <= 0 ) {
+ printf( "Giving up...\n" );
+ return;
+ }
+ for ( idx = 0; idx < cards; idx++ ) {
+ if ( (err = snd_ctl_open( &handle, idx )) < 0 ) {
+ printf( "Open error: %s\n", snd_strerror( err ) );
+ continue;
+ }
+ if ( (err = snd_ctl_hw_info( handle, &info )) < 0 ) {
+ printf( "HW info error: %s\n", snd_strerror( err ) );
+ continue;
+ }
+ for ( idx1 = 0; idx1 < info.mixerdevs; idx1++ )
+ mixer_test( idx, idx1 );
+ snd_ctl_close( handle );
+ }
+}
--- /dev/null
+#
+# Makefile for ALSA library
+# Copyright (c) 1994-98 by Jaroslav Kysela <perex@jcu.cz>
+#
+
+include ../Makefile.conf
+
+clean:
+ rm -f core .depend *.o *.orig *~
+
--- /dev/null
+%define ver 0.0.9
+%define rel 1
+%define prefix /
+
+Summary: Advanced Linux Sound Architecture (ALSA) - Library
+Name: alsa-lib
+Version: %ver
+Release: %rel
+Copyright: GPL
+Group: System/Libraries
+Source: ftp://alsa.jcu.cz/pub/lib/alsa-lib-%{ver}.tar.gz
+BuildRoot: /tmp/alsa-lib-%{ver}
+Packager: Helge Jensen <slog@slog.dk>
+URL: http://alsa.jcu.cz
+Docdir: %{prefix}/usr/doc
+
+%description
+
+Advanced Linux Sound Architecture (ALSA) - Library
+
+Features
+========
+
+* general
+ - modularized architecture with support for 2.0 and latest 2.1 kernels
+ - support for versioned and exported symbols
+ - full proc filesystem support - /proc/sound
+* ISA soundcards
+ - support for 128k ISA DMA buffer
+* mixer
+ - new enhanced API for applications
+ - support for unlimited number of channels
+ - volume can be set in three ways (percentual (0-100), exact and decibel)
+ - support for mute (and hardware mute if hardware supports it)
+ - support for mixer events
+ - this allows two or more applications to be synchronized
+* digital audio (PCM)
+ - new enhanced API for applications
+ - full real duplex support
+ - full duplex support for SoundBlaster 16/AWE soundcards
+ - digital audio data for playback and record should be read back using
+ proc filesystem
+* OSS/Lite compatibility
+ - full mixer compatibity
+ - full PCM (/dev/dsp) compatibility
+
+%changelog
+
+* Mon May 28 1998 Helge Jensen <slog@slog.dk>
+
+- Made SPEC file
+
+%prep
+%setup -n alsa-lib
+%build
+
+./configure --prefix=/usr
+make
+
+%install
+mkdir -p $RPM_BUILD_ROOT/usr/include/sys
+mkdir -p $RPM_BUILD_ROOT/usr/lib
+
+make prefix="$RPM_BUILD_ROOT/usr" install
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%defattr(-, root, root)
+
+%doc doc/*.html
+%doc doc/*.sgml
+%doc doc/*.txt
+
+%{prefix}/usr/include/sys/soundlib.h
+%{prefix}/usr/lib/lib*
--- /dev/null
+%define ver @SND_LIB_VERSION@
+%define rel 1
+%define prefix /
+
+Summary: Advanced Linux Sound Architecture (ALSA) - Library
+Name: alsa-lib
+Version: %ver
+Release: %rel
+Copyright: GPL
+Group: System/Libraries
+Source: ftp://alsa.jcu.cz/pub/lib/alsa-lib-%{ver}.tar.gz
+BuildRoot: /tmp/alsa-lib-%{ver}
+Packager: Helge Jensen <slog@slog.dk>
+URL: http://alsa.jcu.cz
+Docdir: %{prefix}/usr/doc
+Requires: alsa-driver
+
+%description
+
+Advanced Linux Sound Architecture (ALSA) - Library
+
+Features
+========
+
+* general
+ - modularized architecture with support for 2.0 and latest 2.1 kernels
+ - support for versioned and exported symbols
+ - full proc filesystem support - /proc/sound
+* ISA soundcards
+ - support for 128k ISA DMA buffer
+* mixer
+ - new enhanced API for applications
+ - support for unlimited number of channels
+ - volume can be set in three ways (percentual (0-100), exact and decibel)
+ - support for mute (and hardware mute if hardware supports it)
+ - support for mixer events
+ - this allows two or more applications to be synchronized
+* digital audio (PCM)
+ - new enhanced API for applications
+ - full real duplex support
+ - full duplex support for SoundBlaster 16/AWE soundcards
+ - digital audio data for playback and record should be read back using
+ proc filesystem
+* OSS/Lite compatibility
+ - full mixer compatibity
+ - full PCM (/dev/dsp) compatibility
+
+%changelog
+
+* Mon May 28 1998 Helge Jensen <slog@slog.dk>
+
+- Made SPEC file
+
+%prep
+%setup -n alsa-lib
+%build
+
+./configure --prefix=/usr
+make
+
+%install
+mkdir -p $RPM_BUILD_ROOT/usr/include/sys
+mkdir -p $RPM_BUILD_ROOT/usr/lib
+
+make prefix="$RPM_BUILD_ROOT/usr" install
+
+%clean
+rm -rf $RPM_BUILD_ROOT
+
+%files
+%defattr(-, root, root)
+
+%doc doc/*.html
+%doc doc/*.sgml
+%doc doc/*.txt
+
+%{prefix}/usr/include/sys/soundlib.h
+%{prefix}/usr/lib/lib*
--- /dev/null
+#!/bin/bash
+
+source=.
+version=`cat $source/../version`
+package=$source/../../alsa-lib-$version.tar.gz
+
+if [ ! -r $package ]; then
+ echo "Error: wrong package: $package"
+ exit 1
+fi
+
+make -C .. pack
+
+cp -fv $package /usr/src/redhat/SOURCES
+
+if [ ! -r $source/buildrpm ]; then
+ echo "Error: invalid directory: $source"
+ exit 1
+fi
+
+if [ ! -d /usr/src/redhat ]; then
+ echo "Error: /usr/src/redhat directory not found"
+ exit 1
+fi
+
+if [ ! -r $source/alsa-lib.spec ]; then
+ cd $source/..
+ ./configure
+ cd utils
+fi
+
+cp -fv $source/alsa-lib.spec /usr/src/redhat/SPECS
+cd /usr/src/redhat/SPECS
+rpm -ba alsa-lib.spec
+cd /usr/src/redhat
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