Commit 14571fd2 authored by 藤森雅人's avatar 藤森雅人
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Initial commit

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#! /bin/sh
# Configuration validation subroutine script.
# Copyright 1992-2016 Free Software Foundation, Inc.
timestamp='2016-09-05'
# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <http://www.gnu.org/licenses/>.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that
# program. This Exception is an additional permission under section 7
# of the GNU General Public License, version 3 ("GPLv3").
# Please send patches to <config-patches@gnu.org>.
#
# Configuration subroutine to validate and canonicalize a configuration type.
# Supply the specified configuration type as an argument.
# If it is invalid, we print an error message on stderr and exit with code 1.
# Otherwise, we print the canonical config type on stdout and succeed.
# You can get the latest version of this script from:
# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub
# This file is supposed to be the same for all GNU packages
# and recognize all the CPU types, system types and aliases
# that are meaningful with *any* GNU software.
# Each package is responsible for reporting which valid configurations
# it does not support. The user should be able to distinguish
# a failure to support a valid configuration from a meaningless
# configuration.
# The goal of this file is to map all the various variations of a given
# machine specification into a single specification in the form:
# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
# or in some cases, the newer four-part form:
# CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
# It is wrong to echo any other type of specification.
me=`echo "$0" | sed -e 's,.*/,,'`
usage="\
Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS
Canonicalize a configuration name.
Operation modes:
-h, --help print this help, then exit
-t, --time-stamp print date of last modification, then exit
-v, --version print version number, then exit
Report bugs and patches to <config-patches@gnu.org>."
version="\
GNU config.sub ($timestamp)
Copyright 1992-2016 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
help="
Try \`$me --help' for more information."
# Parse command line
while test $# -gt 0 ; do
case $1 in
--time-stamp | --time* | -t )
echo "$timestamp" ; exit ;;
--version | -v )
echo "$version" ; exit ;;
--help | --h* | -h )
echo "$usage"; exit ;;
-- ) # Stop option processing
shift; break ;;
- ) # Use stdin as input.
break ;;
-* )
echo "$me: invalid option $1$help"
exit 1 ;;
*local*)
# First pass through any local machine types.
echo $1
exit ;;
* )
break ;;
esac
done
case $# in
0) echo "$me: missing argument$help" >&2
exit 1;;
1) ;;
*) echo "$me: too many arguments$help" >&2
exit 1;;
esac
# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
# Here we must recognize all the valid KERNEL-OS combinations.
maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
case $maybe_os in
nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \
linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \
knetbsd*-gnu* | netbsd*-gnu* | netbsd*-eabi* | \
kopensolaris*-gnu* | cloudabi*-eabi* | \
storm-chaos* | os2-emx* | rtmk-nova*)
os=-$maybe_os
basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
;;
android-linux)
os=-linux-android
basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown
;;
*)
basic_machine=`echo $1 | sed 's/-[^-]*$//'`
if [ $basic_machine != $1 ]
then os=`echo $1 | sed 's/.*-/-/'`
else os=; fi
;;
esac
### Let's recognize common machines as not being operating systems so
### that things like config.sub decstation-3100 work. We also
### recognize some manufacturers as not being operating systems, so we
### can provide default operating systems below.
case $os in
-sun*os*)
# Prevent following clause from handling this invalid input.
;;
-dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \
-att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \
-unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \
-convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\
-c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \
-harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \
-apple | -axis | -knuth | -cray | -microblaze*)
os=
basic_machine=$1
;;
-bluegene*)
os=-cnk
;;
-sim | -cisco | -oki | -wec | -winbond)
os=
basic_machine=$1
;;
-scout)
;;
-wrs)
os=-vxworks
basic_machine=$1
;;
-chorusos*)
os=-chorusos
basic_machine=$1
;;
-chorusrdb)
os=-chorusrdb
basic_machine=$1
;;
-hiux*)
os=-hiuxwe2
;;
-sco6)
os=-sco5v6
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco5)
os=-sco3.2v5
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco4)
os=-sco3.2v4
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco3.2.[4-9]*)
os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco3.2v[4-9]*)
# Don't forget version if it is 3.2v4 or newer.
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco5v6*)
# Don't forget version if it is 3.2v4 or newer.
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-sco*)
os=-sco3.2v2
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-udk*)
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-isc)
os=-isc2.2
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-clix*)
basic_machine=clipper-intergraph
;;
-isc*)
basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
;;
-lynx*178)
os=-lynxos178
;;
-lynx*5)
os=-lynxos5
;;
-lynx*)
os=-lynxos
;;
-ptx*)
basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
;;
-windowsnt*)
os=`echo $os | sed -e 's/windowsnt/winnt/'`
;;
-psos*)
os=-psos
;;
-mint | -mint[0-9]*)
basic_machine=m68k-atari
os=-mint
;;
esac
# Decode aliases for certain CPU-COMPANY combinations.
case $basic_machine in
# Recognize the basic CPU types without company name.
# Some are omitted here because they have special meanings below.
1750a | 580 \
| a29k \
| aarch64 | aarch64_be \
| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
| am33_2.0 \
| arc | arceb \
| arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
| avr | avr32 \
| ba \
| be32 | be64 \
| bfin \
| c4x | c8051 | clipper \
| d10v | d30v | dlx | dsp16xx \
| e2k | epiphany \
| fido | fr30 | frv | ft32 \
| h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
| hexagon \
| i370 | i860 | i960 | ia64 \
| ip2k | iq2000 \
| k1om \
| le32 | le64 \
| lm32 \
| m32c | m32r | m32rle | m68000 | m68k | m88k \
| maxq | mb | microblaze | microblazeel | mcore | mep | metag \
| mips | mipsbe | mipseb | mipsel | mipsle \
| mips16 \
| mips64 | mips64el \
| mips64octeon | mips64octeonel \
| mips64orion | mips64orionel \
| mips64r5900 | mips64r5900el \
| mips64vr | mips64vrel \
| mips64vr4100 | mips64vr4100el \
| mips64vr4300 | mips64vr4300el \
| mips64vr5000 | mips64vr5000el \
| mips64vr5900 | mips64vr5900el \
| mipsisa32 | mipsisa32el \
| mipsisa32r2 | mipsisa32r2el \
| mipsisa32r6 | mipsisa32r6el \
| mipsisa64 | mipsisa64el \
| mipsisa64r2 | mipsisa64r2el \
| mipsisa64r6 | mipsisa64r6el \
| mipsisa64sb1 | mipsisa64sb1el \
| mipsisa64sr71k | mipsisa64sr71kel \
| mipsr5900 | mipsr5900el \
| mipstx39 | mipstx39el \
| mn10200 | mn10300 \
| moxie \
| mt \
| msp430 \
| nds32 | nds32le | nds32be \
| nios | nios2 | nios2eb | nios2el \
| ns16k | ns32k \
| open8 | or1k | or1knd | or32 \
| pdp10 | pdp11 | pj | pjl \
| powerpc | powerpc64 | powerpc64le | powerpcle \
| pyramid \
| riscv32 | riscv64 \
| rl78 | rx \
| score \
| sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[234]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
| sh64 | sh64le \
| sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \
| sparcv8 | sparcv9 | sparcv9b | sparcv9v \
| spu \
| tahoe | tic4x | tic54x | tic55x | tic6x | tic80 | tron \
| ubicom32 \
| v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \
| visium \
| we32k \
| x86 | xc16x | xstormy16 | xtensa \
| z8k | z80)
basic_machine=$basic_machine-unknown
;;
c54x)
basic_machine=tic54x-unknown
;;
c55x)
basic_machine=tic55x-unknown
;;
c6x)
basic_machine=tic6x-unknown
;;
leon|leon[3-9])
basic_machine=sparc-$basic_machine
;;
m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | nvptx | picochip)
basic_machine=$basic_machine-unknown
os=-none
;;
m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k)
;;
ms1)
basic_machine=mt-unknown
;;
strongarm | thumb | xscale)
basic_machine=arm-unknown
;;
xgate)
basic_machine=$basic_machine-unknown
os=-none
;;
xscaleeb)
basic_machine=armeb-unknown
;;
xscaleel)
basic_machine=armel-unknown
;;
# We use `pc' rather than `unknown'
# because (1) that's what they normally are, and
# (2) the word "unknown" tends to confuse beginning users.
i*86 | x86_64)
basic_machine=$basic_machine-pc
;;
# Object if more than one company name word.
*-*-*)
echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
exit 1
;;
# Recognize the basic CPU types with company name.
580-* \
| a29k-* \
| aarch64-* | aarch64_be-* \
| alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
| alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
| alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \
| arm-* | armbe-* | armle-* | armeb-* | armv*-* \
| avr-* | avr32-* \
| ba-* \
| be32-* | be64-* \
| bfin-* | bs2000-* \
| c[123]* | c30-* | [cjt]90-* | c4x-* \
| c8051-* | clipper-* | craynv-* | cydra-* \
| d10v-* | d30v-* | dlx-* \
| e2k-* | elxsi-* \
| f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
| h8300-* | h8500-* \
| hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
| hexagon-* \
| i*86-* | i860-* | i960-* | ia64-* \
| ip2k-* | iq2000-* \
| k1om-* \
| le32-* | le64-* \
| lm32-* \
| m32c-* | m32r-* | m32rle-* \
| m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
| m88110-* | m88k-* | maxq-* | mcore-* | metag-* \
| microblaze-* | microblazeel-* \
| mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
| mips16-* \
| mips64-* | mips64el-* \
| mips64octeon-* | mips64octeonel-* \
| mips64orion-* | mips64orionel-* \
| mips64r5900-* | mips64r5900el-* \
| mips64vr-* | mips64vrel-* \
| mips64vr4100-* | mips64vr4100el-* \
| mips64vr4300-* | mips64vr4300el-* \
| mips64vr5000-* | mips64vr5000el-* \
| mips64vr5900-* | mips64vr5900el-* \
| mipsisa32-* | mipsisa32el-* \
| mipsisa32r2-* | mipsisa32r2el-* \
| mipsisa32r6-* | mipsisa32r6el-* \
| mipsisa64-* | mipsisa64el-* \
| mipsisa64r2-* | mipsisa64r2el-* \
| mipsisa64r6-* | mipsisa64r6el-* \
| mipsisa64sb1-* | mipsisa64sb1el-* \
| mipsisa64sr71k-* | mipsisa64sr71kel-* \
| mipsr5900-* | mipsr5900el-* \
| mipstx39-* | mipstx39el-* \
| mmix-* \
| mt-* \
| msp430-* \
| nds32-* | nds32le-* | nds32be-* \
| nios-* | nios2-* | nios2eb-* | nios2el-* \
| none-* | np1-* | ns16k-* | ns32k-* \
| open8-* \
| or1k*-* \
| orion-* \
| pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
| powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
| pyramid-* \
| riscv32-* | riscv64-* \
| rl78-* | romp-* | rs6000-* | rx-* \
| sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
| shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
| sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \
| sparclite-* \
| sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx*-* \
| tahoe-* \
| tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
| tile*-* \
| tron-* \
| ubicom32-* \
| v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \
| vax-* \
| visium-* \
| we32k-* \
| x86-* | x86_64-* | xc16x-* | xps100-* \
| xstormy16-* | xtensa*-* \
| ymp-* \
| z8k-* | z80-*)
;;
# Recognize the basic CPU types without company name, with glob match.
xtensa*)
basic_machine=$basic_machine-unknown
;;
# Recognize the various machine names and aliases which stand
# for a CPU type and a company and sometimes even an OS.
386bsd)
basic_machine=i386-unknown
os=-bsd
;;
3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
basic_machine=m68000-att
;;
3b*)
basic_machine=we32k-att
;;
a29khif)
basic_machine=a29k-amd
os=-udi
;;
abacus)
basic_machine=abacus-unknown
;;
adobe68k)
basic_machine=m68010-adobe
os=-scout
;;
alliant | fx80)
basic_machine=fx80-alliant
;;
altos | altos3068)
basic_machine=m68k-altos
;;
am29k)
basic_machine=a29k-none
os=-bsd
;;
amd64)
basic_machine=x86_64-pc
;;
amd64-*)
basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
amdahl)
basic_machine=580-amdahl
os=-sysv
;;
amiga | amiga-*)
basic_machine=m68k-unknown
;;
amigaos | amigados)
basic_machine=m68k-unknown
os=-amigaos
;;
amigaunix | amix)
basic_machine=m68k-unknown
os=-sysv4
;;
apollo68)
basic_machine=m68k-apollo
os=-sysv
;;
apollo68bsd)
basic_machine=m68k-apollo
os=-bsd
;;
aros)
basic_machine=i386-pc
os=-aros
;;
asmjs)
basic_machine=asmjs-unknown
;;
aux)
basic_machine=m68k-apple
os=-aux
;;
balance)
basic_machine=ns32k-sequent
os=-dynix
;;
blackfin)
basic_machine=bfin-unknown
os=-linux
;;
blackfin-*)
basic_machine=bfin-`echo $basic_machine | sed 's/^[^-]*-//'`
os=-linux
;;
bluegene*)
basic_machine=powerpc-ibm
os=-cnk
;;
c54x-*)
basic_machine=tic54x-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
c55x-*)
basic_machine=tic55x-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
c6x-*)
basic_machine=tic6x-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
c90)
basic_machine=c90-cray
os=-unicos
;;
cegcc)
basic_machine=arm-unknown
os=-cegcc
;;
convex-c1)
basic_machine=c1-convex
os=-bsd
;;
convex-c2)
basic_machine=c2-convex
os=-bsd
;;
convex-c32)
basic_machine=c32-convex
os=-bsd
;;
convex-c34)
basic_machine=c34-convex
os=-bsd
;;
convex-c38)
basic_machine=c38-convex
os=-bsd
;;
cray | j90)
basic_machine=j90-cray
os=-unicos
;;
craynv)
basic_machine=craynv-cray
os=-unicosmp
;;
cr16 | cr16-*)
basic_machine=cr16-unknown
os=-elf
;;
crds | unos)
basic_machine=m68k-crds
;;
crisv32 | crisv32-* | etraxfs*)
basic_machine=crisv32-axis
;;
cris | cris-* | etrax*)
basic_machine=cris-axis
;;
crx)
basic_machine=crx-unknown
os=-elf
;;
da30 | da30-*)
basic_machine=m68k-da30
;;
decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
basic_machine=mips-dec
;;
decsystem10* | dec10*)
basic_machine=pdp10-dec
os=-tops10
;;
decsystem20* | dec20*)
basic_machine=pdp10-dec
os=-tops20
;;
delta | 3300 | motorola-3300 | motorola-delta \
| 3300-motorola | delta-motorola)
basic_machine=m68k-motorola
;;
delta88)
basic_machine=m88k-motorola
os=-sysv3
;;
dicos)
basic_machine=i686-pc
os=-dicos
;;
djgpp)
basic_machine=i586-pc
os=-msdosdjgpp
;;
dpx20 | dpx20-*)
basic_machine=rs6000-bull
os=-bosx
;;
dpx2* | dpx2*-bull)
basic_machine=m68k-bull
os=-sysv3
;;
e500v[12])
basic_machine=powerpc-unknown
os=$os"spe"
;;
e500v[12]-*)
basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
os=$os"spe"
;;
ebmon29k)
basic_machine=a29k-amd
os=-ebmon
;;
elxsi)
basic_machine=elxsi-elxsi
os=-bsd
;;
encore | umax | mmax)
basic_machine=ns32k-encore
;;
es1800 | OSE68k | ose68k | ose | OSE)
basic_machine=m68k-ericsson
os=-ose
;;
fx2800)
basic_machine=i860-alliant
;;
genix)
basic_machine=ns32k-ns
;;
gmicro)
basic_machine=tron-gmicro
os=-sysv
;;
go32)
basic_machine=i386-pc
os=-go32
;;
h3050r* | hiux*)
basic_machine=hppa1.1-hitachi
os=-hiuxwe2
;;
h8300hms)
basic_machine=h8300-hitachi
os=-hms
;;
h8300xray)
basic_machine=h8300-hitachi
os=-xray
;;
h8500hms)
basic_machine=h8500-hitachi
os=-hms
;;
harris)
basic_machine=m88k-harris
os=-sysv3
;;
hp300-*)
basic_machine=m68k-hp
;;
hp300bsd)
basic_machine=m68k-hp
os=-bsd
;;
hp300hpux)
basic_machine=m68k-hp
os=-hpux
;;
hp3k9[0-9][0-9] | hp9[0-9][0-9])
basic_machine=hppa1.0-hp
;;
hp9k2[0-9][0-9] | hp9k31[0-9])
basic_machine=m68000-hp
;;
hp9k3[2-9][0-9])
basic_machine=m68k-hp
;;
hp9k6[0-9][0-9] | hp6[0-9][0-9])
basic_machine=hppa1.0-hp
;;
hp9k7[0-79][0-9] | hp7[0-79][0-9])
basic_machine=hppa1.1-hp
;;
hp9k78[0-9] | hp78[0-9])
# FIXME: really hppa2.0-hp
basic_machine=hppa1.1-hp
;;
hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
# FIXME: really hppa2.0-hp
basic_machine=hppa1.1-hp
;;
hp9k8[0-9][13679] | hp8[0-9][13679])
basic_machine=hppa1.1-hp
;;
hp9k8[0-9][0-9] | hp8[0-9][0-9])
basic_machine=hppa1.0-hp
;;
hppa-next)
os=-nextstep3
;;
hppaosf)
basic_machine=hppa1.1-hp
os=-osf
;;
hppro)
basic_machine=hppa1.1-hp
os=-proelf
;;
i370-ibm* | ibm*)
basic_machine=i370-ibm
;;
i*86v32)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-sysv32
;;
i*86v4*)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-sysv4
;;
i*86v)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-sysv
;;
i*86sol2)
basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
os=-solaris2
;;
i386mach)
basic_machine=i386-mach
os=-mach
;;
i386-vsta | vsta)
basic_machine=i386-unknown
os=-vsta
;;
iris | iris4d)
basic_machine=mips-sgi
case $os in
-irix*)
;;
*)
os=-irix4
;;
esac
;;
isi68 | isi)
basic_machine=m68k-isi
os=-sysv
;;
leon-*|leon[3-9]-*)
basic_machine=sparc-`echo $basic_machine | sed 's/-.*//'`
;;
m68knommu)
basic_machine=m68k-unknown
os=-linux
;;
m68knommu-*)
basic_machine=m68k-`echo $basic_machine | sed 's/^[^-]*-//'`
os=-linux
;;
m88k-omron*)
basic_machine=m88k-omron
;;
magnum | m3230)
basic_machine=mips-mips
os=-sysv
;;
merlin)
basic_machine=ns32k-utek
os=-sysv
;;
microblaze*)
basic_machine=microblaze-xilinx
;;
mingw64)
basic_machine=x86_64-pc
os=-mingw64
;;
mingw32)
basic_machine=i686-pc
os=-mingw32
;;
mingw32ce)
basic_machine=arm-unknown
os=-mingw32ce
;;
miniframe)
basic_machine=m68000-convergent
;;
*mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*)
basic_machine=m68k-atari
os=-mint
;;
mips3*-*)
basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
;;
mips3*)
basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
;;
monitor)
basic_machine=m68k-rom68k
os=-coff
;;
morphos)
basic_machine=powerpc-unknown
os=-morphos
;;
moxiebox)
basic_machine=moxie-unknown
os=-moxiebox
;;
msdos)
basic_machine=i386-pc
os=-msdos
;;
ms1-*)
basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'`
;;
msys)
basic_machine=i686-pc
os=-msys
;;
mvs)
basic_machine=i370-ibm
os=-mvs
;;
nacl)
basic_machine=le32-unknown
os=-nacl
;;
ncr3000)
basic_machine=i486-ncr
os=-sysv4
;;
netbsd386)
basic_machine=i386-unknown
os=-netbsd
;;
netwinder)
basic_machine=armv4l-rebel
os=-linux
;;
news | news700 | news800 | news900)
basic_machine=m68k-sony
os=-newsos
;;
news1000)
basic_machine=m68030-sony
os=-newsos
;;
news-3600 | risc-news)
basic_machine=mips-sony
os=-newsos
;;
necv70)
basic_machine=v70-nec
os=-sysv
;;
next | m*-next )
basic_machine=m68k-next
case $os in
-nextstep* )
;;
-ns2*)
os=-nextstep2
;;
*)
os=-nextstep3
;;
esac
;;
nh3000)
basic_machine=m68k-harris
os=-cxux
;;
nh[45]000)
basic_machine=m88k-harris
os=-cxux
;;
nindy960)
basic_machine=i960-intel
os=-nindy
;;
mon960)
basic_machine=i960-intel
os=-mon960
;;
nonstopux)
basic_machine=mips-compaq
os=-nonstopux
;;
np1)
basic_machine=np1-gould
;;
neo-tandem)
basic_machine=neo-tandem
;;
nse-tandem)
basic_machine=nse-tandem
;;
nsr-tandem)
basic_machine=nsr-tandem
;;
op50n-* | op60c-*)
basic_machine=hppa1.1-oki
os=-proelf
;;
openrisc | openrisc-*)
basic_machine=or32-unknown
;;
os400)
basic_machine=powerpc-ibm
os=-os400
;;
OSE68000 | ose68000)
basic_machine=m68000-ericsson
os=-ose
;;
os68k)
basic_machine=m68k-none
os=-os68k
;;
pa-hitachi)
basic_machine=hppa1.1-hitachi
os=-hiuxwe2
;;
paragon)
basic_machine=i860-intel
os=-osf
;;
parisc)
basic_machine=hppa-unknown
os=-linux
;;
parisc-*)
basic_machine=hppa-`echo $basic_machine | sed 's/^[^-]*-//'`
os=-linux
;;
pbd)
basic_machine=sparc-tti
;;
pbb)
basic_machine=m68k-tti
;;
pc532 | pc532-*)
basic_machine=ns32k-pc532
;;
pc98)
basic_machine=i386-pc
;;
pc98-*)
basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentium | p5 | k5 | k6 | nexgen | viac3)
basic_machine=i586-pc
;;
pentiumpro | p6 | 6x86 | athlon | athlon_*)
basic_machine=i686-pc
;;
pentiumii | pentium2 | pentiumiii | pentium3)
basic_machine=i686-pc
;;
pentium4)
basic_machine=i786-pc
;;
pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentiumpro-* | p6-* | 6x86-* | athlon-*)
basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pentium4-*)
basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
pn)
basic_machine=pn-gould
;;
power) basic_machine=power-ibm
;;
ppc | ppcbe) basic_machine=powerpc-unknown
;;
ppc-* | ppcbe-*)
basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
ppcle | powerpclittle)
basic_machine=powerpcle-unknown
;;
ppcle-* | powerpclittle-*)
basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
ppc64) basic_machine=powerpc64-unknown
;;
ppc64-* | ppc64p7-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
ppc64le | powerpc64little)
basic_machine=powerpc64le-unknown
;;
ppc64le-* | powerpc64little-*)
basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
ps2)
basic_machine=i386-ibm
;;
pw32)
basic_machine=i586-unknown
os=-pw32
;;
rdos | rdos64)
basic_machine=x86_64-pc
os=-rdos
;;
rdos32)
basic_machine=i386-pc
os=-rdos
;;
rom68k)
basic_machine=m68k-rom68k
os=-coff
;;
rm[46]00)
basic_machine=mips-siemens
;;
rtpc | rtpc-*)
basic_machine=romp-ibm
;;
s390 | s390-*)
basic_machine=s390-ibm
;;
s390x | s390x-*)
basic_machine=s390x-ibm
;;
sa29200)
basic_machine=a29k-amd
os=-udi
;;
sb1)
basic_machine=mipsisa64sb1-unknown
;;
sb1el)
basic_machine=mipsisa64sb1el-unknown
;;
sde)
basic_machine=mipsisa32-sde
os=-elf
;;
sei)
basic_machine=mips-sei
os=-seiux
;;
sequent)
basic_machine=i386-sequent
;;
sh)
basic_machine=sh-hitachi
os=-hms
;;
sh5el)
basic_machine=sh5le-unknown
;;
sh64)
basic_machine=sh64-unknown
;;
sparclite-wrs | simso-wrs)
basic_machine=sparclite-wrs
os=-vxworks
;;
sps7)
basic_machine=m68k-bull
os=-sysv2
;;
spur)
basic_machine=spur-unknown
;;
st2000)
basic_machine=m68k-tandem
;;
stratus)
basic_machine=i860-stratus
os=-sysv4
;;
strongarm-* | thumb-*)
basic_machine=arm-`echo $basic_machine | sed 's/^[^-]*-//'`
;;
sun2)
basic_machine=m68000-sun
;;
sun2os3)
basic_machine=m68000-sun
os=-sunos3
;;
sun2os4)
basic_machine=m68000-sun
os=-sunos4
;;
sun3os3)
basic_machine=m68k-sun
os=-sunos3
;;
sun3os4)
basic_machine=m68k-sun
os=-sunos4
;;
sun4os3)
basic_machine=sparc-sun
os=-sunos3
;;
sun4os4)
basic_machine=sparc-sun
os=-sunos4
;;
sun4sol2)
basic_machine=sparc-sun
os=-solaris2
;;
sun3 | sun3-*)
basic_machine=m68k-sun
;;
sun4)
basic_machine=sparc-sun
;;
sun386 | sun386i | roadrunner)
basic_machine=i386-sun
;;
sv1)
basic_machine=sv1-cray
os=-unicos
;;
symmetry)
basic_machine=i386-sequent
os=-dynix
;;
t3e)
basic_machine=alphaev5-cray
os=-unicos
;;
t90)
basic_machine=t90-cray
os=-unicos
;;
tile*)
basic_machine=$basic_machine-unknown
os=-linux-gnu
;;
tx39)
basic_machine=mipstx39-unknown
;;
tx39el)
basic_machine=mipstx39el-unknown
;;
toad1)
basic_machine=pdp10-xkl
os=-tops20
;;
tower | tower-32)
basic_machine=m68k-ncr
;;
tpf)
basic_machine=s390x-ibm
os=-tpf
;;
udi29k)
basic_machine=a29k-amd
os=-udi
;;
ultra3)
basic_machine=a29k-nyu
os=-sym1
;;
v810 | necv810)
basic_machine=v810-nec
os=-none
;;
vaxv)
basic_machine=vax-dec
os=-sysv
;;
vms)
basic_machine=vax-dec
os=-vms
;;
vpp*|vx|vx-*)
basic_machine=f301-fujitsu
;;
vxworks960)
basic_machine=i960-wrs
os=-vxworks
;;
vxworks68)
basic_machine=m68k-wrs
os=-vxworks
;;
vxworks29k)
basic_machine=a29k-wrs
os=-vxworks
;;
w65*)
basic_machine=w65-wdc
os=-none
;;
w89k-*)
basic_machine=hppa1.1-winbond
os=-proelf
;;
xbox)
basic_machine=i686-pc
os=-mingw32
;;
xps | xps100)
basic_machine=xps100-honeywell
;;
xscale-* | xscalee[bl]-*)
basic_machine=`echo $basic_machine | sed 's/^xscale/arm/'`
;;
ymp)
basic_machine=ymp-cray
os=-unicos
;;
z8k-*-coff)
basic_machine=z8k-unknown
os=-sim
;;
z80-*-coff)
basic_machine=z80-unknown
os=-sim
;;
none)
basic_machine=none-none
os=-none
;;
# Here we handle the default manufacturer of certain CPU types. It is in
# some cases the only manufacturer, in others, it is the most popular.
w89k)
basic_machine=hppa1.1-winbond
;;
op50n)
basic_machine=hppa1.1-oki
;;
op60c)
basic_machine=hppa1.1-oki
;;
romp)
basic_machine=romp-ibm
;;
mmix)
basic_machine=mmix-knuth
;;
rs6000)
basic_machine=rs6000-ibm
;;
vax)
basic_machine=vax-dec
;;
pdp10)
# there are many clones, so DEC is not a safe bet
basic_machine=pdp10-unknown
;;
pdp11)
basic_machine=pdp11-dec
;;
we32k)
basic_machine=we32k-att
;;
sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele)
basic_machine=sh-unknown
;;
sparc | sparcv8 | sparcv9 | sparcv9b | sparcv9v)
basic_machine=sparc-sun
;;
cydra)
basic_machine=cydra-cydrome
;;
orion)
basic_machine=orion-highlevel
;;
orion105)
basic_machine=clipper-highlevel
;;
mac | mpw | mac-mpw)
basic_machine=m68k-apple
;;
pmac | pmac-mpw)
basic_machine=powerpc-apple
;;
*-unknown)
# Make sure to match an already-canonicalized machine name.
;;
*)
echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
exit 1
;;
esac
# Here we canonicalize certain aliases for manufacturers.
case $basic_machine in
*-digital*)
basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
;;
*-commodore*)
basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
;;
*)
;;
esac
# Decode manufacturer-specific aliases for certain operating systems.
if [ x"$os" != x"" ]
then
case $os in
# First match some system type aliases
# that might get confused with valid system types.
# -solaris* is a basic system type, with this one exception.
-auroraux)
os=-auroraux
;;
-solaris1 | -solaris1.*)
os=`echo $os | sed -e 's|solaris1|sunos4|'`
;;
-solaris)
os=-solaris2
;;
-svr4*)
os=-sysv4
;;
-unixware*)
os=-sysv4.2uw
;;
-gnu/linux*)
os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
;;
# First accept the basic system types.
# The portable systems comes first.
# Each alternative MUST END IN A *, to match a version number.
# -sysv* is not here because it comes later, after sysvr4.
-gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
| -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
| -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
| -sym* | -kopensolaris* | -plan9* \
| -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
| -aos* | -aros* | -cloudabi* | -sortix* \
| -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
| -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
| -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
| -bitrig* | -openbsd* | -solidbsd* | -libertybsd* \
| -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
| -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
| -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
| -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
| -chorusos* | -chorusrdb* | -cegcc* \
| -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
| -midipix* | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \
| -linux-newlib* | -linux-musl* | -linux-uclibc* \
| -uxpv* | -beos* | -mpeix* | -udk* | -moxiebox* \
| -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
| -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
| -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
| -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
| -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
| -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
| -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* \
| -onefs* | -tirtos* | -phoenix*)
# Remember, each alternative MUST END IN *, to match a version number.
;;
-qnx*)
case $basic_machine in
x86-* | i*86-*)
;;
*)
os=-nto$os
;;
esac
;;
-nto-qnx*)
;;
-nto*)
os=`echo $os | sed -e 's|nto|nto-qnx|'`
;;
-sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
| -windows* | -osx | -abug | -netware* | -os9* | -beos* | -haiku* \
| -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
;;
-mac*)
os=`echo $os | sed -e 's|mac|macos|'`
;;
-linux-dietlibc)
os=-linux-dietlibc
;;
-linux*)
os=`echo $os | sed -e 's|linux|linux-gnu|'`
;;
-sunos5*)
os=`echo $os | sed -e 's|sunos5|solaris2|'`
;;
-sunos6*)
os=`echo $os | sed -e 's|sunos6|solaris3|'`
;;
-opened*)
os=-openedition
;;
-os400*)
os=-os400
;;
-wince*)
os=-wince
;;
-osfrose*)
os=-osfrose
;;
-osf*)
os=-osf
;;
-utek*)
os=-bsd
;;
-dynix*)
os=-bsd
;;
-acis*)
os=-aos
;;
-atheos*)
os=-atheos
;;
-syllable*)
os=-syllable
;;
-386bsd)
os=-bsd
;;
-ctix* | -uts*)
os=-sysv
;;
-nova*)
os=-rtmk-nova
;;
-ns2 )
os=-nextstep2
;;
-nsk*)
os=-nsk
;;
# Preserve the version number of sinix5.
-sinix5.*)
os=`echo $os | sed -e 's|sinix|sysv|'`
;;
-sinix*)
os=-sysv4
;;
-tpf*)
os=-tpf
;;
-triton*)
os=-sysv3
;;
-oss*)
os=-sysv3
;;
-svr4)
os=-sysv4
;;
-svr3)
os=-sysv3
;;
-sysvr4)
os=-sysv4
;;
# This must come after -sysvr4.
-sysv*)
;;
-ose*)
os=-ose
;;
-es1800*)
os=-ose
;;
-xenix)
os=-xenix
;;
-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
os=-mint
;;
-aros*)
os=-aros
;;
-zvmoe)
os=-zvmoe
;;
-dicos*)
os=-dicos
;;
-nacl*)
;;
-ios)
;;
-none)
;;
*)
# Get rid of the `-' at the beginning of $os.
os=`echo $os | sed 's/[^-]*-//'`
echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
exit 1
;;
esac
else
# Here we handle the default operating systems that come with various machines.
# The value should be what the vendor currently ships out the door with their
# machine or put another way, the most popular os provided with the machine.
# Note that if you're going to try to match "-MANUFACTURER" here (say,
# "-sun"), then you have to tell the case statement up towards the top
# that MANUFACTURER isn't an operating system. Otherwise, code above
# will signal an error saying that MANUFACTURER isn't an operating
# system, and we'll never get to this point.
case $basic_machine in
score-*)
os=-elf
;;
spu-*)
os=-elf
;;
*-acorn)
os=-riscix1.2
;;
arm*-rebel)
os=-linux
;;
arm*-semi)
os=-aout
;;
c4x-* | tic4x-*)
os=-coff
;;
c8051-*)
os=-elf
;;
hexagon-*)
os=-elf
;;
tic54x-*)
os=-coff
;;
tic55x-*)
os=-coff
;;
tic6x-*)
os=-coff
;;
# This must come before the *-dec entry.
pdp10-*)
os=-tops20
;;
pdp11-*)
os=-none
;;
*-dec | vax-*)
os=-ultrix4.2
;;
m68*-apollo)
os=-domain
;;
i386-sun)
os=-sunos4.0.2
;;
m68000-sun)
os=-sunos3
;;
m68*-cisco)
os=-aout
;;
mep-*)
os=-elf
;;
mips*-cisco)
os=-elf
;;
mips*-*)
os=-elf
;;
or32-*)
os=-coff
;;
*-tti) # must be before sparc entry or we get the wrong os.
os=-sysv3
;;
sparc-* | *-sun)
os=-sunos4.1.1
;;
*-be)
os=-beos
;;
*-haiku)
os=-haiku
;;
*-ibm)
os=-aix
;;
*-knuth)
os=-mmixware
;;
*-wec)
os=-proelf
;;
*-winbond)
os=-proelf
;;
*-oki)
os=-proelf
;;
*-hp)
os=-hpux
;;
*-hitachi)
os=-hiux
;;
i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
os=-sysv
;;
*-cbm)
os=-amigaos
;;
*-dg)
os=-dgux
;;
*-dolphin)
os=-sysv3
;;
m68k-ccur)
os=-rtu
;;
m88k-omron*)
os=-luna
;;
*-next )
os=-nextstep
;;
*-sequent)
os=-ptx
;;
*-crds)
os=-unos
;;
*-ns)
os=-genix
;;
i370-*)
os=-mvs
;;
*-next)
os=-nextstep3
;;
*-gould)
os=-sysv
;;
*-highlevel)
os=-bsd
;;
*-encore)
os=-bsd
;;
*-sgi)
os=-irix
;;
*-siemens)
os=-sysv4
;;
*-masscomp)
os=-rtu
;;
f30[01]-fujitsu | f700-fujitsu)
os=-uxpv
;;
*-rom68k)
os=-coff
;;
*-*bug)
os=-coff
;;
*-apple)
os=-macos
;;
*-atari*)
os=-mint
;;
*)
os=-none
;;
esac
fi
# Here we handle the case where we know the os, and the CPU type, but not the
# manufacturer. We pick the logical manufacturer.
vendor=unknown
case $basic_machine in
*-unknown)
case $os in
-riscix*)
vendor=acorn
;;
-sunos*)
vendor=sun
;;
-cnk*|-aix*)
vendor=ibm
;;
-beos*)
vendor=be
;;
-hpux*)
vendor=hp
;;
-mpeix*)
vendor=hp
;;
-hiux*)
vendor=hitachi
;;
-unos*)
vendor=crds
;;
-dgux*)
vendor=dg
;;
-luna*)
vendor=omron
;;
-genix*)
vendor=ns
;;
-mvs* | -opened*)
vendor=ibm
;;
-os400*)
vendor=ibm
;;
-ptx*)
vendor=sequent
;;
-tpf*)
vendor=ibm
;;
-vxsim* | -vxworks* | -windiss*)
vendor=wrs
;;
-aux*)
vendor=apple
;;
-hms*)
vendor=hitachi
;;
-mpw* | -macos*)
vendor=apple
;;
-*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
vendor=atari
;;
-vos*)
vendor=stratus
;;
esac
basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
;;
esac
echo $basic_machine$os
exit
# Local variables:
# eval: (add-hook 'write-file-hooks 'time-stamp)
# time-stamp-start: "timestamp='"
# time-stamp-format: "%:y-%02m-%02d"
# time-stamp-end: "'"
# End:
This source diff could not be displayed because it is too large. You can view the blob instead.
dnl Process this file with autoconf to produce a configure script.
AC_INIT([libogg],[1.3.3],[ogg-dev@xiph.org])
AC_CONFIG_SRCDIR(src/framing.c)
AM_INIT_AUTOMAKE
AM_MAINTAINER_MODE([enable])
dnl Library versioning
LIB_CURRENT=8
LIB_REVISION=3
LIB_AGE=8
AC_SUBST(LIB_CURRENT)
AC_SUBST(LIB_REVISION)
AC_SUBST(LIB_AGE)
AC_PROG_CC
AM_PROG_LIBTOOL
AM_PROG_CC_C_O
dnl Set some options based on environment
cflags_save="$CFLAGS"
if test -z "$GCC"; then
case $host in
*-*-irix*)
DEBUG="-g -signed"
CFLAGS="-O2 -w -signed"
PROFILE="-p -g3 -O2 -signed"
;;
sparc-sun-solaris*)
DEBUG="-v -g"
CFLAGS="-xO4 -fast -w -fsimple -native -xcg92"
PROFILE="-v -xpg -g -xO4 -fast -native -fsimple -xcg92 -Dsuncc"
;;
*)
DEBUG="-g"
CFLAGS="-O"
PROFILE="-g -p"
;;
esac
else
case $host in
*-*-linux*)
DEBUG="-g -Wall -fsigned-char"
CFLAGS="-O20 -Wall -ffast-math -fsigned-char"
PROFILE="-Wall -W -pg -g -O20 -ffast-math -fsigned-char"
;;
sparc-sun-*)
DEBUG="-g -Wall -fsigned-char"
CFLAGS="-O20 -ffast-math -fsigned-char"
PROFILE="-pg -g -O20 -fsigned-char"
;;
*-*-darwin*)
DEBUG="-fno-common -g -Wall -fsigned-char"
CFLAGS="-fno-common -O4 -Wall -fsigned-char -ffast-math"
PROFILE="-fno-common -O4 -Wall -pg -g -fsigned-char -ffast-math"
;;
*)
DEBUG="-g -Wall -fsigned-char"
CFLAGS="-O20 -fsigned-char"
PROFILE="-O20 -g -pg -fsigned-char"
;;
esac
fi
CFLAGS="$CFLAGS $cflags_save"
DEBUG="$DEBUG $cflags_save"
PROFILE="$PROFILE $cflags_save"
dnl Checks for programs.
dnl Checks for libraries.
dnl Checks for header files.
AC_HEADER_STDC
INCLUDE_INTTYPES_H=0
INCLUDE_STDINT_H=0
INCLUDE_SYS_TYPES_H=0
AC_CHECK_HEADER(inttypes.h,INCLUDE_INTTYPES_H=1)
AC_CHECK_HEADER(stdint.h,INCLUDE_STDINT_H=1)
AC_CHECK_HEADER(sys/types.h,INCLUDE_SYS_TYPES_H=1)
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
dnl Check for types
AC_CHECK_SIZEOF(int16_t)
AC_CHECK_SIZEOF(uint16_t)
AC_CHECK_SIZEOF(u_int16_t)
AC_CHECK_SIZEOF(int32_t)
AC_CHECK_SIZEOF(uint32_t)
AC_CHECK_SIZEOF(u_int32_t)
AC_CHECK_SIZEOF(int64_t)
AC_CHECK_SIZEOF(short)
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
case 2 in
$ac_cv_sizeof_int16_t) SIZE16="int16_t";;
$ac_cv_sizeof_short) SIZE16="short";;
$ac_cv_sizeof_int) SIZE16="int";;
esac
case 2 in
$ac_cv_sizeof_uint16_t) USIZE16="uint16_t";;
$ac_cv_sizeof_short) USIZE16="unsigned short";;
$ac_cv_sizeof_int) USIZE16="unsigned int";;
$ac_cv_sizeof_u_int16_t) USIZE16="u_int16_t";;
esac
case 4 in
$ac_cv_sizeof_int32_t) SIZE32="int32_t";;
$ac_cv_sizeof_short) SIZE32="short";;
$ac_cv_sizeof_int) SIZE32="int";;
$ac_cv_sizeof_long) SIZE32="long";;
esac
case 4 in
$ac_cv_sizeof_uint32_t) USIZE32="uint32_t";;
$ac_cv_sizeof_short) USIZE32="unsigned short";;
$ac_cv_sizeof_int) USIZE32="unsigned int";;
$ac_cv_sizeof_long) USIZE32="unsigned long";;
$ac_cv_sizeof_u_int32_t) USIZE32="u_int32_t";;
esac
case 8 in
$ac_cv_sizeof_int64_t) SIZE64="int64_t";;
$ac_cv_sizeof_int) SIZE64="int";;
$ac_cv_sizeof_long) SIZE64="long";;
$ac_cv_sizeof_long_long) SIZE64="long long";;
esac
if test -z "$SIZE16"; then
AC_MSG_ERROR(No 16 bit type found on this platform!)
fi
if test -z "$USIZE16"; then
AC_MSG_ERROR(No unsigned 16 bit type found on this platform!)
fi
if test -z "$SIZE32"; then
AC_MSG_ERROR(No 32 bit type found on this platform!)
fi
if test -z "$USIZE32"; then
AC_MSG_ERROR(No unsigned 32 bit type found on this platform!)
fi
if test -z "$SIZE64"; then
AC_MSG_WARN(No 64 bit type found on this platform!)
fi
dnl Checks for library functions.
AC_FUNC_MEMCMP
dnl Make substitutions
AC_SUBST(LIBTOOL_DEPS)
AC_SUBST(INCLUDE_INTTYPES_H)
AC_SUBST(INCLUDE_STDINT_H)
AC_SUBST(INCLUDE_SYS_TYPES_H)
AC_SUBST(SIZE16)
AC_SUBST(USIZE16)
AC_SUBST(SIZE32)
AC_SUBST(USIZE32)
AC_SUBST(SIZE64)
AC_SUBST(OPT)
AC_SUBST(LIBS)
AC_SUBST(DEBUG)
AC_SUBST(CFLAGS)
AC_SUBST(PROFILE)
AC_CONFIG_FILES([
Makefile
src/Makefile
doc/Makefile doc/libogg/Makefile
include/Makefile include/ogg/Makefile include/ogg/config_types.h
libogg.spec
ogg.pc
ogg-uninstalled.pc
])
AC_CONFIG_HEADERS([config.h])
AC_OUTPUT
#! /bin/sh
# depcomp - compile a program generating dependencies as side-effects
scriptversion=2013-05-30.07; # UTC
# Copyright (C) 1999-2014 Free Software Foundation, Inc.
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2, or (at your option)
# any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that program.
# Originally written by Alexandre Oliva <oliva@dcc.unicamp.br>.
case $1 in
'')
echo "$0: No command. Try '$0 --help' for more information." 1>&2
exit 1;
;;
-h | --h*)
cat <<\EOF
Usage: depcomp [--help] [--version] PROGRAM [ARGS]
Run PROGRAMS ARGS to compile a file, generating dependencies
as side-effects.
Environment variables:
depmode Dependency tracking mode.
source Source file read by 'PROGRAMS ARGS'.
object Object file output by 'PROGRAMS ARGS'.
DEPDIR directory where to store dependencies.
depfile Dependency file to output.
tmpdepfile Temporary file to use when outputting dependencies.
libtool Whether libtool is used (yes/no).
Report bugs to <bug-automake@gnu.org>.
EOF
exit $?
;;
-v | --v*)
echo "depcomp $scriptversion"
exit $?
;;
esac
# Get the directory component of the given path, and save it in the
# global variables '$dir'. Note that this directory component will
# be either empty or ending with a '/' character. This is deliberate.
set_dir_from ()
{
case $1 in
*/*) dir=`echo "$1" | sed -e 's|/[^/]*$|/|'`;;
*) dir=;;
esac
}
# Get the suffix-stripped basename of the given path, and save it the
# global variable '$base'.
set_base_from ()
{
base=`echo "$1" | sed -e 's|^.*/||' -e 's/\.[^.]*$//'`
}
# If no dependency file was actually created by the compiler invocation,
# we still have to create a dummy depfile, to avoid errors with the
# Makefile "include basename.Plo" scheme.
make_dummy_depfile ()
{
echo "#dummy" > "$depfile"
}
# Factor out some common post-processing of the generated depfile.
# Requires the auxiliary global variable '$tmpdepfile' to be set.
aix_post_process_depfile ()
{
# If the compiler actually managed to produce a dependency file,
# post-process it.
if test -f "$tmpdepfile"; then
# Each line is of the form 'foo.o: dependency.h'.
# Do two passes, one to just change these to
# $object: dependency.h
# and one to simply output
# dependency.h:
# which is needed to avoid the deleted-header problem.
{ sed -e "s,^.*\.[$lower]*:,$object:," < "$tmpdepfile"
sed -e "s,^.*\.[$lower]*:[$tab ]*,," -e 's,$,:,' < "$tmpdepfile"
} > "$depfile"
rm -f "$tmpdepfile"
else
make_dummy_depfile
fi
}
# A tabulation character.
tab=' '
# A newline character.
nl='
'
# Character ranges might be problematic outside the C locale.
# These definitions help.
upper=ABCDEFGHIJKLMNOPQRSTUVWXYZ
lower=abcdefghijklmnopqrstuvwxyz
digits=0123456789
alpha=${upper}${lower}
if test -z "$depmode" || test -z "$source" || test -z "$object"; then
echo "depcomp: Variables source, object and depmode must be set" 1>&2
exit 1
fi
# Dependencies for sub/bar.o or sub/bar.obj go into sub/.deps/bar.Po.
depfile=${depfile-`echo "$object" |
sed 's|[^\\/]*$|'${DEPDIR-.deps}'/&|;s|\.\([^.]*\)$|.P\1|;s|Pobj$|Po|'`}
tmpdepfile=${tmpdepfile-`echo "$depfile" | sed 's/\.\([^.]*\)$/.T\1/'`}
rm -f "$tmpdepfile"
# Avoid interferences from the environment.
gccflag= dashmflag=
# Some modes work just like other modes, but use different flags. We
# parameterize here, but still list the modes in the big case below,
# to make depend.m4 easier to write. Note that we *cannot* use a case
# here, because this file can only contain one case statement.
if test "$depmode" = hp; then
# HP compiler uses -M and no extra arg.
gccflag=-M
depmode=gcc
fi
if test "$depmode" = dashXmstdout; then
# This is just like dashmstdout with a different argument.
dashmflag=-xM
depmode=dashmstdout
fi
cygpath_u="cygpath -u -f -"
if test "$depmode" = msvcmsys; then
# This is just like msvisualcpp but w/o cygpath translation.
# Just convert the backslash-escaped backslashes to single forward
# slashes to satisfy depend.m4
cygpath_u='sed s,\\\\,/,g'
depmode=msvisualcpp
fi
if test "$depmode" = msvc7msys; then
# This is just like msvc7 but w/o cygpath translation.
# Just convert the backslash-escaped backslashes to single forward
# slashes to satisfy depend.m4
cygpath_u='sed s,\\\\,/,g'
depmode=msvc7
fi
if test "$depmode" = xlc; then
# IBM C/C++ Compilers xlc/xlC can output gcc-like dependency information.
gccflag=-qmakedep=gcc,-MF
depmode=gcc
fi
case "$depmode" in
gcc3)
## gcc 3 implements dependency tracking that does exactly what
## we want. Yay! Note: for some reason libtool 1.4 doesn't like
## it if -MD -MP comes after the -MF stuff. Hmm.
## Unfortunately, FreeBSD c89 acceptance of flags depends upon
## the command line argument order; so add the flags where they
## appear in depend2.am. Note that the slowdown incurred here
## affects only configure: in makefiles, %FASTDEP% shortcuts this.
for arg
do
case $arg in
-c) set fnord "$@" -MT "$object" -MD -MP -MF "$tmpdepfile" "$arg" ;;
*) set fnord "$@" "$arg" ;;
esac
shift # fnord
shift # $arg
done
"$@"
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile"
exit $stat
fi
mv "$tmpdepfile" "$depfile"
;;
gcc)
## Note that this doesn't just cater to obsosete pre-3.x GCC compilers.
## but also to in-use compilers like IMB xlc/xlC and the HP C compiler.
## (see the conditional assignment to $gccflag above).
## There are various ways to get dependency output from gcc. Here's
## why we pick this rather obscure method:
## - Don't want to use -MD because we'd like the dependencies to end
## up in a subdir. Having to rename by hand is ugly.
## (We might end up doing this anyway to support other compilers.)
## - The DEPENDENCIES_OUTPUT environment variable makes gcc act like
## -MM, not -M (despite what the docs say). Also, it might not be
## supported by the other compilers which use the 'gcc' depmode.
## - Using -M directly means running the compiler twice (even worse
## than renaming).
if test -z "$gccflag"; then
gccflag=-MD,
fi
"$@" -Wp,"$gccflag$tmpdepfile"
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile"
exit $stat
fi
rm -f "$depfile"
echo "$object : \\" > "$depfile"
# The second -e expression handles DOS-style file names with drive
# letters.
sed -e 's/^[^:]*: / /' \
-e 's/^['$alpha']:\/[^:]*: / /' < "$tmpdepfile" >> "$depfile"
## This next piece of magic avoids the "deleted header file" problem.
## The problem is that when a header file which appears in a .P file
## is deleted, the dependency causes make to die (because there is
## typically no way to rebuild the header). We avoid this by adding
## dummy dependencies for each header file. Too bad gcc doesn't do
## this for us directly.
## Some versions of gcc put a space before the ':'. On the theory
## that the space means something, we add a space to the output as
## well. hp depmode also adds that space, but also prefixes the VPATH
## to the object. Take care to not repeat it in the output.
## Some versions of the HPUX 10.20 sed can't process this invocation
## correctly. Breaking it into two sed invocations is a workaround.
tr ' ' "$nl" < "$tmpdepfile" \
| sed -e 's/^\\$//' -e '/^$/d' -e "s|.*$object$||" -e '/:$/d' \
| sed -e 's/$/ :/' >> "$depfile"
rm -f "$tmpdepfile"
;;
hp)
# This case exists only to let depend.m4 do its work. It works by
# looking at the text of this script. This case will never be run,
# since it is checked for above.
exit 1
;;
sgi)
if test "$libtool" = yes; then
"$@" "-Wp,-MDupdate,$tmpdepfile"
else
"$@" -MDupdate "$tmpdepfile"
fi
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile"
exit $stat
fi
rm -f "$depfile"
if test -f "$tmpdepfile"; then # yes, the sourcefile depend on other files
echo "$object : \\" > "$depfile"
# Clip off the initial element (the dependent). Don't try to be
# clever and replace this with sed code, as IRIX sed won't handle
# lines with more than a fixed number of characters (4096 in
# IRIX 6.2 sed, 8192 in IRIX 6.5). We also remove comment lines;
# the IRIX cc adds comments like '#:fec' to the end of the
# dependency line.
tr ' ' "$nl" < "$tmpdepfile" \
| sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' \
| tr "$nl" ' ' >> "$depfile"
echo >> "$depfile"
# The second pass generates a dummy entry for each header file.
tr ' ' "$nl" < "$tmpdepfile" \
| sed -e 's/^.*\.o://' -e 's/#.*$//' -e '/^$/ d' -e 's/$/:/' \
>> "$depfile"
else
make_dummy_depfile
fi
rm -f "$tmpdepfile"
;;
xlc)
# This case exists only to let depend.m4 do its work. It works by
# looking at the text of this script. This case will never be run,
# since it is checked for above.
exit 1
;;
aix)
# The C for AIX Compiler uses -M and outputs the dependencies
# in a .u file. In older versions, this file always lives in the
# current directory. Also, the AIX compiler puts '$object:' at the
# start of each line; $object doesn't have directory information.
# Version 6 uses the directory in both cases.
set_dir_from "$object"
set_base_from "$object"
if test "$libtool" = yes; then
tmpdepfile1=$dir$base.u
tmpdepfile2=$base.u
tmpdepfile3=$dir.libs/$base.u
"$@" -Wc,-M
else
tmpdepfile1=$dir$base.u
tmpdepfile2=$dir$base.u
tmpdepfile3=$dir$base.u
"$@" -M
fi
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
exit $stat
fi
for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
do
test -f "$tmpdepfile" && break
done
aix_post_process_depfile
;;
tcc)
# tcc (Tiny C Compiler) understand '-MD -MF file' since version 0.9.26
# FIXME: That version still under development at the moment of writing.
# Make that this statement remains true also for stable, released
# versions.
# It will wrap lines (doesn't matter whether long or short) with a
# trailing '\', as in:
#
# foo.o : \
# foo.c \
# foo.h \
#
# It will put a trailing '\' even on the last line, and will use leading
# spaces rather than leading tabs (at least since its commit 0394caf7
# "Emit spaces for -MD").
"$@" -MD -MF "$tmpdepfile"
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile"
exit $stat
fi
rm -f "$depfile"
# Each non-empty line is of the form 'foo.o : \' or ' dep.h \'.
# We have to change lines of the first kind to '$object: \'.
sed -e "s|.*:|$object :|" < "$tmpdepfile" > "$depfile"
# And for each line of the second kind, we have to emit a 'dep.h:'
# dummy dependency, to avoid the deleted-header problem.
sed -n -e 's|^ *\(.*\) *\\$|\1:|p' < "$tmpdepfile" >> "$depfile"
rm -f "$tmpdepfile"
;;
## The order of this option in the case statement is important, since the
## shell code in configure will try each of these formats in the order
## listed in this file. A plain '-MD' option would be understood by many
## compilers, so we must ensure this comes after the gcc and icc options.
pgcc)
# Portland's C compiler understands '-MD'.
# Will always output deps to 'file.d' where file is the root name of the
# source file under compilation, even if file resides in a subdirectory.
# The object file name does not affect the name of the '.d' file.
# pgcc 10.2 will output
# foo.o: sub/foo.c sub/foo.h
# and will wrap long lines using '\' :
# foo.o: sub/foo.c ... \
# sub/foo.h ... \
# ...
set_dir_from "$object"
# Use the source, not the object, to determine the base name, since
# that's sadly what pgcc will do too.
set_base_from "$source"
tmpdepfile=$base.d
# For projects that build the same source file twice into different object
# files, the pgcc approach of using the *source* file root name can cause
# problems in parallel builds. Use a locking strategy to avoid stomping on
# the same $tmpdepfile.
lockdir=$base.d-lock
trap "
echo '$0: caught signal, cleaning up...' >&2
rmdir '$lockdir'
exit 1
" 1 2 13 15
numtries=100
i=$numtries
while test $i -gt 0; do
# mkdir is a portable test-and-set.
if mkdir "$lockdir" 2>/dev/null; then
# This process acquired the lock.
"$@" -MD
stat=$?
# Release the lock.
rmdir "$lockdir"
break
else
# If the lock is being held by a different process, wait
# until the winning process is done or we timeout.
while test -d "$lockdir" && test $i -gt 0; do
sleep 1
i=`expr $i - 1`
done
fi
i=`expr $i - 1`
done
trap - 1 2 13 15
if test $i -le 0; then
echo "$0: failed to acquire lock after $numtries attempts" >&2
echo "$0: check lockdir '$lockdir'" >&2
exit 1
fi
if test $stat -ne 0; then
rm -f "$tmpdepfile"
exit $stat
fi
rm -f "$depfile"
# Each line is of the form `foo.o: dependent.h',
# or `foo.o: dep1.h dep2.h \', or ` dep3.h dep4.h \'.
# Do two passes, one to just change these to
# `$object: dependent.h' and one to simply `dependent.h:'.
sed "s,^[^:]*:,$object :," < "$tmpdepfile" > "$depfile"
# Some versions of the HPUX 10.20 sed can't process this invocation
# correctly. Breaking it into two sed invocations is a workaround.
sed 's,^[^:]*: \(.*\)$,\1,;s/^\\$//;/^$/d;/:$/d' < "$tmpdepfile" \
| sed -e 's/$/ :/' >> "$depfile"
rm -f "$tmpdepfile"
;;
hp2)
# The "hp" stanza above does not work with aCC (C++) and HP's ia64
# compilers, which have integrated preprocessors. The correct option
# to use with these is +Maked; it writes dependencies to a file named
# 'foo.d', which lands next to the object file, wherever that
# happens to be.
# Much of this is similar to the tru64 case; see comments there.
set_dir_from "$object"
set_base_from "$object"
if test "$libtool" = yes; then
tmpdepfile1=$dir$base.d
tmpdepfile2=$dir.libs/$base.d
"$@" -Wc,+Maked
else
tmpdepfile1=$dir$base.d
tmpdepfile2=$dir$base.d
"$@" +Maked
fi
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile1" "$tmpdepfile2"
exit $stat
fi
for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2"
do
test -f "$tmpdepfile" && break
done
if test -f "$tmpdepfile"; then
sed -e "s,^.*\.[$lower]*:,$object:," "$tmpdepfile" > "$depfile"
# Add 'dependent.h:' lines.
sed -ne '2,${
s/^ *//
s/ \\*$//
s/$/:/
p
}' "$tmpdepfile" >> "$depfile"
else
make_dummy_depfile
fi
rm -f "$tmpdepfile" "$tmpdepfile2"
;;
tru64)
# The Tru64 compiler uses -MD to generate dependencies as a side
# effect. 'cc -MD -o foo.o ...' puts the dependencies into 'foo.o.d'.
# At least on Alpha/Redhat 6.1, Compaq CCC V6.2-504 seems to put
# dependencies in 'foo.d' instead, so we check for that too.
# Subdirectories are respected.
set_dir_from "$object"
set_base_from "$object"
if test "$libtool" = yes; then
# Libtool generates 2 separate objects for the 2 libraries. These
# two compilations output dependencies in $dir.libs/$base.o.d and
# in $dir$base.o.d. We have to check for both files, because
# one of the two compilations can be disabled. We should prefer
# $dir$base.o.d over $dir.libs/$base.o.d because the latter is
# automatically cleaned when .libs/ is deleted, while ignoring
# the former would cause a distcleancheck panic.
tmpdepfile1=$dir$base.o.d # libtool 1.5
tmpdepfile2=$dir.libs/$base.o.d # Likewise.
tmpdepfile3=$dir.libs/$base.d # Compaq CCC V6.2-504
"$@" -Wc,-MD
else
tmpdepfile1=$dir$base.d
tmpdepfile2=$dir$base.d
tmpdepfile3=$dir$base.d
"$@" -MD
fi
stat=$?
if test $stat -ne 0; then
rm -f "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
exit $stat
fi
for tmpdepfile in "$tmpdepfile1" "$tmpdepfile2" "$tmpdepfile3"
do
test -f "$tmpdepfile" && break
done
# Same post-processing that is required for AIX mode.
aix_post_process_depfile
;;
msvc7)
if test "$libtool" = yes; then
showIncludes=-Wc,-showIncludes
else
showIncludes=-showIncludes
fi
"$@" $showIncludes > "$tmpdepfile"
stat=$?
grep -v '^Note: including file: ' "$tmpdepfile"
if test $stat -ne 0; then
rm -f "$tmpdepfile"
exit $stat
fi
rm -f "$depfile"
echo "$object : \\" > "$depfile"
# The first sed program below extracts the file names and escapes
# backslashes for cygpath. The second sed program outputs the file
# name when reading, but also accumulates all include files in the
# hold buffer in order to output them again at the end. This only
# works with sed implementations that can handle large buffers.
sed < "$tmpdepfile" -n '
/^Note: including file: *\(.*\)/ {
s//\1/
s/\\/\\\\/g
p
}' | $cygpath_u | sort -u | sed -n '
s/ /\\ /g
s/\(.*\)/'"$tab"'\1 \\/p
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<h1>Ogg logical bitstream framing</h1>
<h2>Ogg bitstreams</h2>
<p>The Ogg transport bitstream is designed to provide framing, error
protection and seeking structure for higher-level codec streams that
consist of raw, unencapsulated data packets, such as the Vorbis audio
codec or Theora video codec.</p>
<h2>Application example: Vorbis</h2>
<p>Vorbis encodes short-time blocks of PCM data into raw packets of
bit-packed data. These raw packets may be used directly by transport
mechanisms that provide their own framing and packet-separation
mechanisms (such as UDP datagrams). For stream based storage (such as
files) and transport (such as TCP streams or pipes), Vorbis uses the
Ogg bitstream format to provide framing/sync, sync recapture
after error, landmarks during seeking, and enough information to
properly separate data back into packets at the original packet
boundaries without relying on decoding to find packet boundaries.</p>
<h2>Design constraints for Ogg bitstreams</h2>
<ol>
<li>True streaming; we must not need to seek to build a 100%
complete bitstream.</li>
<li>Use no more than approximately 1-2% of bitstream bandwidth for
packet boundary marking, high-level framing, sync and seeking.</li>
<li>Specification of absolute position within the original sample
stream.</li>
<li>Simple mechanism to ease limited editing, such as a simplified
concatenation mechanism.</li>
<li>Detection of corruption, recapture after error and direct, random
access to data at arbitrary positions in the bitstream.</li>
</ol>
<h2>Logical and Physical Bitstreams</h2>
<p>A <em>logical</em> Ogg bitstream is a contiguous stream of
sequential pages belonging only to the logical bitstream. A
<em>physical</em> Ogg bitstream is constructed from one or more
than one logical Ogg bitstream (the simplest physical bitstream
is simply a single logical bitstream). We describe below the exact
formatting of an Ogg logical bitstream. Combining logical
bitstreams into more complex physical bitstreams is described in the
<a href="oggstream.html">Ogg bitstream overview</a>. The exact
mapping of raw Vorbis packets into a valid Ogg Vorbis physical
bitstream is described in the Vorbis I Specification.</p>
<h2>Bitstream structure</h2>
<p>An Ogg stream is structured by dividing incoming packets into
segments of up to 255 bytes and then wrapping a group of contiguous
packet segments into a variable length page preceded by a page
header. Both the header size and page size are variable; the page
header contains sizing information and checksum data to determine
header/page size and data integrity.</p>
<p>The bitstream is captured (or recaptured) by looking for the beginning
of a page, specifically the capture pattern. Once the capture pattern
is found, the decoder verifies page sync and integrity by computing
and comparing the checksum. At that point, the decoder can extract the
packets themselves.</p>
<h3>Packet segmentation</h3>
<p>Packets are logically divided into multiple segments before encoding
into a page. Note that the segmentation and fragmentation process is a
logical one; it's used to compute page header values and the original
page data need not be disturbed, even when a packet spans page
boundaries.</p>
<p>The raw packet is logically divided into [n] 255 byte segments and a
last fractional segment of &lt; 255 bytes. A packet size may well
consist only of the trailing fractional segment, and a fractional
segment may be zero length. These values, called "lacing values" are
then saved and placed into the header segment table.</p>
<p>An example should make the basic concept clear:</p>
<pre>
<tt>
raw packet:
___________________________________________
|______________packet data__________________| 753 bytes
lacing values for page header segment table: 255,255,243
</tt>
</pre>
<p>We simply add the lacing values for the total size; the last lacing
value for a packet is always the value that is less than 255. Note
that this encoding both avoids imposing a maximum packet size as well
as imposing minimum overhead on small packets (as opposed to, eg,
simply using two bytes at the head of every packet and having a max
packet size of 32k. Small packets (&lt;255, the typical case) are
penalized with twice the segmentation overhead). Using the lacing
values as suggested, small packets see the minimum possible
byte-aligned overhead (1 byte) and large packets, over 512 bytes or
so, see a fairly constant ~.5% overhead on encoding space.</p>
<p>Note that a lacing value of 255 implies that a second lacing value
follows in the packet, and a value of &lt; 255 marks the end of the
packet after that many additional bytes. A packet of 255 bytes (or a
multiple of 255 bytes) is terminated by a lacing value of 0:</p>
<pre><tt>
raw packet:
_______________________________
|________packet data____________| 255 bytes
lacing values: 255, 0
</tt></pre>
<p>Note also that a 'nil' (zero length) packet is not an error; it
consists of nothing more than a lacing value of zero in the header.</p>
<h3>Packets spanning pages</h3>
<p>Packets are not restricted to beginning and ending within a page,
although individual segments are, by definition, required to do so.
Packets are not restricted to a maximum size, although excessively
large packets in the data stream are discouraged.</p>
<p>After segmenting a packet, the encoder may decide not to place all the
resulting segments into the current page; to do so, the encoder places
the lacing values of the segments it wishes to belong to the current
page into the current segment table, then finishes the page. The next
page is begun with the first value in the segment table belonging to
the next packet segment, thus continuing the packet (data in the
packet body must also correspond properly to the lacing values in the
spanned pages. The segment data in the first packet corresponding to
the lacing values of the first page belong in that page; packet
segments listed in the segment table of the following page must begin
the page body of the subsequent page).</p>
<p>The last mechanic to spanning a page boundary is to set the header
flag in the new page to indicate that the first lacing value in the
segment table continues rather than begins a packet; a header flag of
0x01 is set to indicate a continued packet. Although mandatory, it
is not actually algorithmically necessary; one could inspect the
preceding segment table to determine if the packet is new or
continued. Adding the information to the packet_header flag allows a
simpler design (with no overhead) that needs only inspect the current
page header after frame capture. This also allows faster error
recovery in the event that the packet originates in a corrupt
preceding page, implying that the previous page's segment table
cannot be trusted.</p>
<p>Note that a packet can span an arbitrary number of pages; the above
spanning process is repeated for each spanned page boundary. Also a
'zero termination' on a packet size that is an even multiple of 255
must appear even if the lacing value appears in the next page as a
zero-length continuation of the current packet. The header flag
should be set to 0x01 to indicate that the packet spanned, even though
the span is a nil case as far as data is concerned.</p>
<p>The encoding looks odd, but is properly optimized for speed and the
expected case of the majority of packets being between 50 and 200
bytes (note that it is designed such that packets of wildly different
sizes can be handled within the model; placing packet size
restrictions on the encoder would have only slightly simplified design
in page generation and increased overall encoder complexity).</p>
<p>The main point behind tracking individual packets (and packet
segments) is to allow more flexible encoding tricks that requiring
explicit knowledge of packet size. An example is simple bandwidth
limiting, implemented by simply truncating packets in the nominal case
if the packet is arranged so that the least sensitive portion of the
data comes last.</p>
<a name="page_header"></a>
<h3>Page header</h3>
<p>The headering mechanism is designed to avoid copying and re-assembly
of the packet data (ie, making the packet segmentation process a
logical one); the header can be generated directly from incoming
packet data. The encoder buffers packet data until it finishes a
complete page at which point it writes the header followed by the
buffered packet segments.</p>
<h4>capture_pattern</h4>
<p>A header begins with a capture pattern that simplifies identifying
pages; once the decoder has found the capture pattern it can do a more
intensive job of verifying that it has in fact found a page boundary
(as opposed to an inadvertent coincidence in the byte stream).</p>
<pre><tt>
byte value
0 0x4f 'O'
1 0x67 'g'
2 0x67 'g'
3 0x53 'S'
</tt></pre>
<h4>stream_structure_version</h4>
<p>The capture pattern is followed by the stream structure revision:</p>
<pre><tt>
byte value
4 0x00
</tt></pre>
<h4>header_type_flag</h4>
<p>The header type flag identifies this page's context in the bitstream:</p>
<pre><tt>
byte value
5 bitflags: 0x01: unset = fresh packet
set = continued packet
0x02: unset = not first page of logical bitstream
set = first page of logical bitstream (bos)
0x04: unset = not last page of logical bitstream
set = last page of logical bitstream (eos)
</tt></pre>
<h4>absolute granule position</h4>
<p>(This is packed in the same way the rest of Ogg data is packed; LSb
of LSB first. Note that the 'position' data specifies a 'sample'
number (eg, in a CD quality sample is four octets, 16 bits for left
and 16 bits for right; in video it would likely be the frame number.
It is up to the specific codec in use to define the semantic meaning
of the granule position value). The position specified is the total
samples encoded after including all packets finished on this page
(packets begun on this page but continuing on to the next page do not
count). The rationale here is that the position specified in the
frame header of the last page tells how long the data coded by the
bitstream is. A truncated stream will still return the proper number
of samples that can be decoded fully.</p>
<p>A special value of '-1' (in two's complement) indicates that no packets
finish on this page.</p>
<pre><tt>
byte value
6 0xXX LSB
7 0xXX
8 0xXX
9 0xXX
10 0xXX
11 0xXX
12 0xXX
13 0xXX MSB
</tt></pre>
<h4>stream serial number</h4>
<p>Ogg allows for separate logical bitstreams to be mixed at page
granularity in a physical bitstream. The most common case would be
sequential arrangement, but it is possible to interleave pages for
two separate bitstreams to be decoded concurrently. The serial
number is the means by which pages physical pages are associated with
a particular logical stream. Each logical stream must have a unique
serial number within a physical stream:</p>
<pre><tt>
byte value
14 0xXX LSB
15 0xXX
16 0xXX
17 0xXX MSB
</tt></pre>
<h4>page sequence no</h4>
<p>Page counter; lets us know if a page is lost (useful where packets
span page boundaries).</p>
<pre><tt>
byte value
18 0xXX LSB
19 0xXX
20 0xXX
21 0xXX MSB
</tt></pre>
<h4>page checksum</h4>
<p>32 bit CRC value (direct algorithm, initial val and final XOR = 0,
generator polynomial=0x04c11db7). The value is computed over the
entire header (with the CRC field in the header set to zero) and then
continued over the page. The CRC field is then filled with the
computed value.</p>
<p>(A thorough discussion of CRC algorithms can be found in <a
href="http://www.ross.net/crc/download/crc_v3.txt">"A
Painless Guide to CRC Error Detection Algorithms"</a> by Ross
Williams <a href="mailto:ross@ross.net">ross@ross.net</a>.)</p>
<pre><tt>
byte value
22 0xXX LSB
23 0xXX
24 0xXX
25 0xXX MSB
</tt></pre>
<h4>page_segments</h4>
<p>The number of segment entries to appear in the segment table. The
maximum number of 255 segments (255 bytes each) sets the maximum
possible physical page size at 65307 bytes or just under 64kB (thus
we know that a header corrupted so as destroy sizing/alignment
information will not cause a runaway bitstream. We'll read in the
page according to the corrupted size information that's guaranteed to
be a reasonable size regardless, notice the checksum mismatch, drop
sync and then look for recapture).</p>
<pre><tt>
byte value
26 0x00-0xff (0-255)
</tt></pre>
<h4>segment_table (containing packet lacing values)</h4>
<p>The lacing values for each packet segment physically appearing in
this page are listed in contiguous order.</p>
<pre><tt>
byte value
27 0x00-0xff (0-255)
[...]
n 0x00-0xff (0-255, n=page_segments+26)
</tt></pre>
<p>Total page size is calculated directly from the known header size and
lacing values in the segment table. Packet data segments follow
immediately after the header.</p>
<p>Page headers typically impose a flat .25-.5% space overhead assuming
nominal ~8k page sizes. The segmentation table needed for exact
packet recovery in the streaming layer adds approximately .5-1%
nominal assuming expected encoder behavior in the 44.1kHz, 128kbps
stereo encodings.</p>
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<h1>Ogg Documentation</h1>
<h2>Ogg programming documentation</h2>
<ul>
<li><a href="libogg/index.html">Programming with ogg</a></li>
</ul>
<h2>Ogg bitstream documentation</h2>
<ul>
<li><a href="oggstream.html">Ogg bitstream overview</a></li>
<li><a href="framing.html">Ogg bitstream framing</a></li>
<li><a href="ogg-multiplex.html">Ogg multi-stream multiplexing</a></li>
<li><a href="skeleton.html">The Ogg Skeleton Metadata Bitstream</a></li>
</ul>
<h2>RFC documentation</h2>
<ul>
<li><a href="rfc3533.txt">rfc3533: The Ogg Encapsulation Format Version 0</a></li>
<li><a href="rfc5334.txt">rfc5334: Ogg Media Types</a></li>
</ul>
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<html>
<head>
<title>libogg - Bitpacking Functions</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>Bitpacking Functions</h1>
<p>Libogg contains a basic bitpacking library that is useful for manipulating data within a buffer.
<p>
All the <b>libogg</b> specific functions are declared in "ogg/ogg.h".
<p>
<table border=1 color=black width=50% cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td><b>function</b></td>
<td><b>purpose</b></td>
</tr>
<tr valign=top>
<td><a href="oggpack_writeinit.html">oggpack_writeinit</a></td>
<td>Initializes a buffer for writing using this bitpacking library.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_writecheck.html">oggpack_writecheck</a></td>
<td>Asynchronously checks error status of bitpacker write buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_reset.html">oggpack_reset</a></td>
<td>Clears and resets the buffer to the initial position.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_writeclear.html">oggpack_writeclear</a></td>
<td>Frees the memory used by the buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_readinit.html">oggpack_readinit</a></td>
<td>Initializes a buffer for reading using this bitpacking library.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_write.html">oggpack_write</a></td>
<td>Writes bytes to the specified location within the buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_look.html">oggpack_look</a></td>
<td>Look at a specified number of bits, <=32, without advancing the location pointer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_look1.html">oggpack_look1</a></td>
<td>Looks at one bit without advancing the location pointer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_adv.html">oggpack_adv</a></td>
<td>Advances the location pointer by a specified number of bits.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_adv1.html">oggpack_adv1</a></td>
<td>Advances the location pointer by one bit.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_read.html">oggpack_read</a></td>
<td>Reads a specified number of bits from the buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_read1.html">oggpack_read1</a></td>
<td>Reads one bit from the buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_bytes.html">oggpack_bytes</a></td>
<td>Returns the total number of bytes contained within the buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_bits.html">oggpack_bits</a></td>
<td>Returns the total number of bits contained within the buffer.</td>
</tr>
<tr valign=top>
<td><a href="oggpack_get_buffer.html">oggpack_get_buffer</a></td>
<td>Returns a pointer to the buffer encapsulated within the <a href="oggpack_buffer.html">oggpack_buffer</a> struct.</td>
</tr>
</table>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - Base Data Structures</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>Base Data Structures</h1>
<p>Libogg uses several data structures to hold data and state information.
<p>
All the <b>libogg</b> specific data structures are declared in "ogg/ogg.h".
<p>
<table border=1 color=black width=50% cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td><b>datatype</b></td>
<td><b>purpose</b></td>
</tr>
<tr valign=top>
<td><a href="ogg_page.html">ogg_page</a></td>
<td>This structure encapsulates data into one ogg bitstream page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_state.html">ogg_stream_state</a></td>
<td>This structure contains current encode/decode data for a logical bitstream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_packet.html">ogg_packet</a></td>
<td>This structure encapsulates the data and metadata for a single Ogg packet.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_state.html">ogg_sync_state</a></td>
<td>Contains bitstream synchronization information.</td>
</tr>
</table>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - Decoding</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>Decoding</h1>
<p>Libogg contains a set of functions used in the decoding process.
<p>
All the <b>libogg</b> specific functions are declared in "ogg/ogg.h".
<p>
<p>Decoding is based around the ogg synchronization layer. The <a href="ogg_sync_state.html">ogg_sync_state</a> struct coordinates between incoming data and the decoder. We read data into the synchronization layer, submit the data to the stream, and output raw packets to the decoder.
<p>Decoding through the Ogg layer follows a specific logical sequence. A read loop follows these logical steps:
<ul>
<li>Expose a buffer using <a href="ogg_sync_buffer.html">ogg_sync_buffer()</a>.
<li>Read data into the buffer, using fread() or a similar function.
<li>Call <a href="ogg_sync_wrote.html">ogg_sync_wrote()</a> to tell the synchronization layer how many bytes you wrote into the buffer.
<li>Write out the data using <a href="ogg_sync_pageout.html">ogg_sync_pageout</a>.
<li>Submit the completed page to the streaming layer with <a href="ogg_stream_pagein.html">ogg_stream_pagein</a>.
<li>Output a packet of data to the codec-specific decoding layer using <a href="ogg_stream_packetout.html">ogg_stream_packetout</a>.
</ul>
<p>In practice, streams are more complex, and Ogg also must handle headers, incomplete or dropped pages, and other errors in input.
<br><br>
<table border=1 color=black width=50% cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td><b>function</b></td>
<td><b>purpose</b></td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_init.html">ogg_sync_init</a></td>
<td>Initializes an Ogg bitstream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_clear.html">ogg_sync_clear</a></td>
<td>Clears the status information from the synchronization struct.<td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_reset.html">ogg_sync_reset</a></td>
<td>Resets the synchronization status to initial values.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_destroy.html">ogg_sync_destroy</a></td>
<td>Frees the synchronization struct.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_check.html">ogg_sync_check</a></td>
<td>Check for asynchronous errors.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_buffer.html">ogg_sync_buffer</a></td>
<td>Exposes a buffer from the synchronization layer in order to read data.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_wrote.html">ogg_sync_wrote</a></td>
<td>Tells the synchronization layer how many bytes were written into the buffer.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_pageseek.html">ogg_sync_pageseek</a></td>
<td>Finds the borders of pages and resynchronizes the stream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_sync_pageout.html">ogg_sync_pageout</a></td>
<td>Outputs a page from the synchronization layer.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_pagein.html">ogg_stream_pagein</a></td>
<td>Submits a complete page to the stream layer.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_packetout.html">ogg_stream_packetout</a></td>
<td>Outputs a packet to the codec-specific decoding engine.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_packetpeek.html">ogg_stream_packetpeek</a></td>
<td>Provides access to the next packet in the bitstream without
advancing decoding.</td>
</tr>
</table>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - Encoding</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>Encoding</h1>
<p>Libogg contains a set of functions used in the encoding process.
<p>
All the <b>libogg</b> specific functions are declared in "ogg/ogg.h".
<p>
<p>When encoding, the encoding engine will output raw packets which must be placed into an Ogg bitstream.
<p>Raw packets are inserted into the stream, and an <a href="ogg_page.html">ogg_page</a> is output when enough packets have been written to create a full page. The pages output are pointers to buffered packet segments, and can then be written out and saved as an ogg stream.
<p>There are a couple of basic steps:
<ul>
<li>Use the encoding engine to produce a raw packet of data.
<li>Call <a href="ogg_stream_packetin.html">ogg_stream_packetin</a> to submit a raw packet to the stream.
<li>Use <a href="ogg_stream_pageout.html">ogg_stream_pageout</a> to output a page, if enough data has been submitted. Otherwise, continue submitting data.
</ul>
<br><br>
<table border=1 color=black width=50% cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td><b>function</b></td>
<td><b>purpose</b></td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_packetin.html">ogg_stream_packetin</a></td>
<td>Submits a raw packet to the streaming layer, so that it can be formed into a page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_iovecin.html">ogg_stream_iovecin</a></td>
<td>iovec version of ogg_stream_packetin() above.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_pageout.html">ogg_stream_pageout</a></td>
<td>Outputs a completed page if the stream contains enough packets to form a full page.<td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_pageout_fill.html">ogg_stream_pageout_fill</a></td>
<td>Similar to ogg_stream_pageout(), but specifies a page spill threshold in bytes.
</tr>
<tr valign=top>
<td><a href="ogg_stream_flush.html">ogg_stream_flush</a></td>
<td>Forces any remaining packets in the stream to be returned as a page of any size.<td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_flush_fill.html">ogg_stream_flush_fill</a></td>
<td>Similar to ogg_stream_flush(), but specifies a page spill threshold in bytes.<td>
</tr>
</table>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - General Functions</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>General Functions</h1>
<p>Libogg contains several functions which are generally useful when using Ogg streaming, whether encoding or decoding.
<p>
All the <b>libogg</b> specific functions are declared in "ogg/ogg.h".
<p>
<p>These functions can be used to manipulate some of the basic elements of Ogg - streams and pages. Streams and pages are important during both the encode and decode process.
<br>
<table border=1 color=black width=50% cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td><b>function</b></td>
<td><b>purpose</b></td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_init.html">ogg_stream_init</a></td>
<td>Initializes an Ogg bitstream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_clear.html">ogg_stream_clear</a></td>
<td>Clears the storage within the Ogg stream, but does not free the stream itself.<td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_reset.html">ogg_stream_reset</a></td>
<td>Resets the stream status to its initial position.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_destroy.html">ogg_stream_destroy</a></td>
<td>Frees the entire Ogg stream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_check.html">ogg_stream_check</a></td>
<td>Check for asyncronous errors.</td>
</tr>
<tr valign=top>
<td><a href="ogg_stream_eos.html">ogg_stream_eos</a></td>
<td>Indicates whether we are at the end of the stream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_version.html">ogg_page_version</a></td>
<td>Returns the version of ogg_page that this stream/page uses</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_continued.html">ogg_page_continued</a></td>
<td>Indicates if the current page contains a continued packet from the last page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_packets.html">ogg_page_packets</a></td>
<td>Indicates the number of packets contained in a page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_bos.html">ogg_page_bos</a></td>
<td>Indicates if the current page is the beginning of the stream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_eos.html">ogg_page_eos</a></td>
<td>Indicates if the current page is the end of the stream.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_granulepos.html">ogg_page_granulepos</a></td>
<td>Returns the precise playback location of this page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_serialno.html">ogg_page_serialno</a></td>
<td>Returns the unique serial number of the logical bitstream associated with this page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_pageno.html">ogg_page_pageno</a></td>
<td>Returns the sequential page number for this page.</td>
</tr>
<tr valign=top>
<td><a href="ogg_packet_clear.html">ogg_packet_clear</a></td>
<td>Clears the ogg_packet structure.</td>
</tr>
<tr valign=top>
<td><a href="ogg_page_checksum_set.html">ogg_page_checksum_set</a></td>
<td>Checksums an ogg_page.</td>
</tr>
</table>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - Documentation</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>Libogg Documentation</h1>
<p>
Libogg contains necessary functionality to create, decode, and work with Ogg bitstreams.
<p>This document explains how to use the libogg API in detail.
<p>
<a href="overview.html">libogg api overview</a><br>
<a href="reference.html">libogg api reference</a><br>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - datatype - ogg_iovec_t</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>ogg_iovec_t</h1>
<p><i>declared in "ogg/ogg.h"</i></p>
<p>
The ogg_iovec_t struct encapsulates a length-encoded buffer. An array
of ogg_iovec_t is used to pass a list of buffers to functions that
accept data in ogg_iovec_t* form.
<p>
<table border=0 width=100% color=black cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td>
<pre><b>
typedef struct {
void *iov_base;
size_t iov_len;
} ogg_iovec_t;
</b></pre>
</td>
</tr>
</table>
<h3>Relevant Struct Members</h3>
<dl>
<dt><i>iov_base</i></dt>
<dd>Pointer to the buffer data.</dd>
<dt><i>iov_len</i></dt>
<dd>Length of buffer data in bytes.</dd>
</dl>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - datatype - ogg_packet</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>ogg_packet</h1>
<p><i>declared in "ogg/ogg.h"</i></p>
<p>
The ogg_packet struct encapsulates the data for a single raw packet of data
and is used to transfer data between the ogg framing layer and the handling codec.
<p>
<table border=0 width=100% color=black cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td>
<pre><b>
typedef struct {
unsigned char *packet;
long bytes;
long b_o_s;
long e_o_s;
ogg_int64_t granulepos;
ogg_int64_t packetno;
} ogg_packet;
</b></pre>
</td>
</tr>
</table>
<h3>Relevant Struct Members</h3>
<dl>
<dt><i>packet</i></dt>
<dd>Pointer to the packet's data. This is treated as an opaque type by the ogg layer.</dd>
<dt><i>bytes</i></dt>
<dd>Indicates the size of the packet data in bytes. Packets can be of arbitrary size.</dd>
<dt><i>b_o_s</i></dt>
<dd>Flag indicating whether this packet begins a logical bitstream. <tt>1</tt> indicates this is the first packet, <tt>0</tt> indicates any other position in the stream.</dd>
<dt><i>e_o_s</i></dt>
<dd>Flag indicating whether this packet ends a bitstream. <tt>1</tt> indicates the last packet, <tt>0</tt> indicates any other position in the stream.</dd>
<dt><i>granulepos</i></dt>
<dd>A number indicating the position of this packet in the decoded data. This is the last sample, frame or other unit of information ('granule') that can be completely decoded from this packet.</dd>
<dt><i>packetno</i></dt>
<dd>Sequential number of this packet in the ogg bitstream.<dd>
</dl>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
<html>
<head>
<title>libogg - function - ogg_packet_clear</title>
<link rel=stylesheet href="style.css" type="text/css">
</head>
<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
<table border=0 width=100%>
<tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
<h1>ogg_packet_clear</h1>
<p><i>declared in "ogg/ogg.h";</i></p>
<p>This function clears the memory used by the <a href="ogg_packet.html">ogg_packet</a> struct,
but does not free the structure itself.
It unconditionally frees the <i>packet</i> data buffer,
then it zeros all structure members.
<br><br>
<table border=0 color=black cellspacing=0 cellpadding=7>
<tr bgcolor=#cccccc>
<td>
<pre><b>
void ogg_packet_clear(ogg_packet *op);
</b></pre>
</td>
</tr>
</table>
<h3>Parameters</h3>
<dl>
<dt><i>op</i></dt>
<dd>Pointer to the ogg_packet struct to be cleared.</dd>
</dl>
<h3>Return Values</h3>
<blockquote>
<li>
None.</li>
</blockquote>
<p>
<br><br>
<hr noshade>
<table border=0 width=100%>
<tr valign=top>
<td><p class=tiny>copyright &copy; 2000-2014 Xiph.Org</p></td>
<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/">Ogg Container Format</a></p></td>
</tr><tr>
<td><p class=tiny>libogg documentation</p></td>
<td align=right><p class=tiny>libogg release 1.3.2 - 20140527</p></td>
</tr>
</table>
</body>
</html>
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