Commit 62987760 authored by Gildas Bazin's avatar Gildas Bazin

Inital import

parents
Gildas Bazin <gbazin@videolan.org> implementation of the
DTS Coherent Acoustics decoder and current maintainer of dtsdec.
While the libdts part of the source code was mostly written from scratch, this
project was started from the a52dec code base so the original credits for
a52dec are preserved:
Aaron Holtzman <aholtzma@ess.engr.uvic.ca> started the project and
made the initial working implementation.
Michel Lespinasse <walken@zoy.org> did major changes for speed and
conformance and is the current maintainer.
Other contributors include:
Gildas Bazin <gbazin@netcourrier.com> - mingw32 port
Billy Biggs <vektor@div8.net> - most of liba52.txt
Jeroen Dobbelaere <jeroen.dobbelaere@acunia.com> - fixed point version
Eduard Hasenleithner <eduardh@aon.at> - gcc 3.0 fixes
Hkan Hjort <d95hjort@dtek.chalmers.se> - Solaris output, mlib code
Charles M. Hannum <root@ihack.net> - fixes
Chris Hodges <hodges@stradis.com> - made the library reentrant
Michael Holzt <kju@flummi.de> - OSS output.c and misc errata
Angelos Keromytis <angelos@dsl.cis.upenn.edu> - OpenBSD fixes
David I. Lehn <dlehn@vt.edu> - API cleanup suggestion
Don Mahurin <dmahurin@dma.org> - stdin support for extract_a52
Jim Miller <jmiller@heli.engr.sgi.com> - IRIX output.c
Takefumi Sayo <stake@niagara.shiojiri.ne.jp> - FreeBSD tweak
Shoji Tokunaga <toku@mac.com> - aif file output
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dtsdec-0.1.0-cvs
-First public release of dtsdec.
-Code based on a52dec-0.7.4.
\ No newline at end of file
Unix build instructions
-----------------------
./configure
make
make install
If you install from CVS you'll have to run ./bootstrap first
Building for win32
------------------
There are at least three ways to do it:
- natively on Windows using Microsoft VC++ and the vc++ project
included in this distribution.
- natively on Windows using MSYS + MINGW (www.mingw.org) (MSYS is a
minimal build environnement to compile unixish projects under
windows. It provides all the common unix tools like sh, gmake...)
- or on Linux, using the mingw32 cross-compiler
Building using MSYS + MINGW on windows
--------------------------------------
First you will need to download and install the latest MSYS (version
1.0.7 as of now) and MINGW. The installation is really easy. Begin
with the MSYS auto-installer and once this is done, extract MINGW into
c:\msys\1.0\mingw. You also have to remember to remove the make
utility included with MINGW as it conflicts with the one from MSYS
(just rename or remove c:\msys\1.0\mingw\bin\make.exe).
http://prdownloads.sourceforge.net/mingw/MSYS-1.0.7-i686-2002.04.24-1.exe
http://prdownloads.sourceforge.net/mingw/MinGW-1.1.tar.gz
Then you can build the package using:
# ./configure
# make
Building using the mingw32 cross-compiler
-----------------------------------------
You need to install mingw32 first. For Debian GNU/Linux users, there
is a mingw32 package. Otherwise you might get it from the mingw site
at http://www.mingw.org/download.shtml.
The videolan project also keeps precompiled mingw32 binaries at
http://www.videolan.org/vlc/windows.html . If you install these,
you'll have to set your PATH accordingly to include
/usr/local/cross-tools/bin too.
The build should then proceed using something like:
# CC=i586-mingw32msvc-gcc ./configure --host=i586-mingw32msvc
# make
SUBDIRS = autotools include doc libdts libao src vc++ test
EXTRA_DIST = bootstrap
dtsdec-0.1.0-cvs
First public release of libdts, a DTS Coherent Acoustics decoder based
on the publicly available ETSI specification (ETSI 102 114 v1.2.1).
Code based on a52dec-0.7.4
ABOUT LIBDTS
libdts is a free library for decoding DTS Coherent Acoustics streams. It is
released under the terms of the GPL license. The DTS Coherent Acoustics
standard is used in a variety of applications, including DVD, DTS audio CD and
radio broadcasting.
The main goals in libdts development are:
* Portability - currently all of the code is written in C, and
when we write platform-specific optimizations we will always
keep a generic C routine to fall back on.
* Reuseability - we do not want libdts to include any
project-specific code, but it should still include enough
features to be used by very diverse projects.
* Precision - we do not yet fully support all the core specification of
the DTS Coherent Acoustics standard (see TODO) so do not expect too
much of this library for now.
* Speed - current code is not optimised at all.
The project homepage is at http://www.videolan.org/libdts
DTSDEC
dtsdec is a test program for libdts. It decodes DTS Coherent Acoustics streams,
and also includes a demultiplexer for mpeg-1 and mpeg-2 program streams.
The libdts source code is always distributed in the dtsdec package, to
make sure it easier for people to test it.
The basic usage is to just type "dtsdec file" where file is a DTS Coherent
Acoustics file.
The "-s" option must be used for multiplexed (audio and video) mpeg-2
files. These files are usualy found on the internet or on unencrypted
DVDs.
The "-o" option is used to select a given output layer. By default
dtsdec does a stereo downmix and outputs to your speakers, but you can
try other choices using this option. This is also used for performance
testing and conformance testing.
The "-c" option is used to disable all optimizations (currently only djbfft).
The "-r" option is used to disable the dynamic range compression.
OTHER PROJECTS USING LIBDTS
right now libdts is only being used by VLC media player
(http://www.videolan.org/) a cross-platform video player and streaming
solution.
If you use libdts in another project, let us know !
TASKS
There are several places where we could easily use some help:
* Testing: If you find any stream that does not decode right
with libdts, let us know ! The best thing would be to mail to
the libdts-devel mailing list. Also if you have access to
encoders, we'd love to get test streams that would be free of
rights - so that we can put them on this server.
* Coding: you can have a look in the TODO file first ! The most
important items are probably to finish implementing the full
specification and to make sure of the accuracy of the audio output.
* Porting: If you're porting to a new architecture, you might
want to experiment with the compile flags defined in
configure.in . When you figure out whats fastest on your
platform, send us a patch !
REFERENCES
The DTS Coherent Acoustics standard (ETSI 102 114 v1.2.1), as published by the
ETSI, is available at http://pda.etsi.org/pda/queryform.asp (look for DTS
Coherent Acoustics)
SVN REPOSITORY
The latest libdts and dtsdec source code can always be found by anonymous
SVN repository:
# svn co svn://svn.zoy.org/dtsdec
SUPPORT / MAILING LISTS
See the support information at http://www.videolan.org/support/
libdts-devel
This is the main mailing list for technical discussion about
libdts. Anyone wanting to work on libdts, or maybe just stay informed
about the development process, should probably subscribe to this list.
* finalize the API:
- which PCM output format (s24,s32,float...) ?
- any special needs for the extensions ?
* implement missing features:
- check output gain! I couldn't find anything in the spec about this so
right now I'm assuming the output of the 32 subbands QMF is supposed to
be in 16 bits/sample form but this seems very dubious.
- fix downmix (user proper channes coefs, move downmix before QMF)
- lfe support
- sum/difference audio channels
- vq encoded high frequencies (where are the codebooks ??)
- joint channels coding
- dynamic range
- dialog normalization
- check audio output accuracy (right now the main issue is the output gain)
- extensions (96k, extra channels)
* optimize:
- don't use doubles everywhere
- integerize everything ? (main difficulty should be the QMF and LFE FIR)
- faster 32 subbands QMF
* reliability:
- make the parser more tolerant to faulty bitstreams
- more sanity checks
- crc checks
- regressions tests
* code cleanup
dnl AC_C_RESTRICT
dnl Do nothing if the compiler accepts the restrict keyword.
dnl Otherwise define restrict to __restrict__ or __restrict if one of
dnl those work, otherwise define restrict to be empty.
AC_DEFUN([AC_C_RESTRICT],
[AC_MSG_CHECKING([for restrict])
ac_cv_c_restrict=no
for ac_kw in restrict __restrict__ __restrict; do
AC_TRY_COMPILE([],[char * $ac_kw p;],[ac_cv_c_restrict=$ac_kw; break])
done
AC_MSG_RESULT([$ac_cv_c_restrict])
case $ac_cv_c_restrict in
restrict) ;;
no) AC_DEFINE([restrict],,
[Define as `__restrict' if that's what the C compiler calls
it, or to nothing if it is not supported.]) ;;
*) AC_DEFINE_UNQUOTED([restrict],$ac_cv_c_restrict) ;;
esac])
dnl AC_C_BUILTIN_EXPECT
dnl Check whether compiler understands __builtin_expect.
AC_DEFUN([AC_C_BUILTIN_EXPECT],
[AC_CACHE_CHECK([for __builtin_expect],[ac_cv_builtin_expect],
[cat > conftest.c <<EOF
#line __oline__ "configure"
int foo (int a)
{
a = __builtin_expect (a, 10);
return a == 10 ? 0 : 1;
}
EOF
if AC_TRY_COMMAND([${CC-cc} $CFLAGS -nostdlib -nostartfiles
-o conftest conftest.c -lgcc >&AC_FD_CC]); then
ac_cv_builtin_expect=yes
else
ac_cv_builtin_expect=no
fi
rm -f conftest*])
if test x"$ac_cv_builtin_expect" = x"yes"; then
AC_DEFINE(HAVE_BUILTIN_EXPECT,,
[Define if you have the `__builtin_expect' function.])
fi])
dnl AC_C_ALWAYS_INLINE
dnl Define inline to something appropriate, including the new always_inline
dnl attribute from gcc 3.1
AC_DEFUN([AC_C_ALWAYS_INLINE],
[AC_C_INLINE
if test x"$GCC" = x"yes" -a x"$ac_cv_c_inline" = x"inline"; then
AC_MSG_CHECKING([for always_inline])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Wall -Werror"
AC_TRY_COMPILE([],
[__attribute__ ((__always_inline__)) void f (void);
#ifdef __cplusplus
42 = 42; // obviously illegal - we want c++ to fail here
#endif],
[ac_cv_always_inline=yes],[ac_cv_always_inline=no])
CFLAGS="$SAVE_CFLAGS"
AC_MSG_RESULT([$ac_cv_always_inline])
if test x"$ac_cv_always_inline" = x"yes"; then
AC_DEFINE_UNQUOTED([inline],[__attribute__ ((__always_inline__))])
fi
fi])
dnl AC_C_ATTRIBUTE_ALIGNED
dnl define ATTRIBUTE_ALIGNED_MAX to the maximum alignment if this is supported
AC_DEFUN([AC_C_ATTRIBUTE_ALIGNED],
[SAV_CFLAGS=$CFLAGS;
if test x"$GCC" = xyes; then CFLAGS="$CFLAGS -Werror"; fi
AC_CACHE_CHECK([__attribute__ ((aligned ())) support],
[ac_cv_c_attribute_aligned],
[ac_cv_c_attribute_aligned=0
for ac_cv_c_attr_align_try in 2 4 8 16 32 64; do
AC_TRY_COMPILE([],
[static char c __attribute__ ((aligned($ac_cv_c_attr_align_try))) = 0; return c;],
[ac_cv_c_attribute_aligned=$ac_cv_c_attr_align_try])
done])
if test x"$ac_cv_c_attribute_aligned" != x"0"; then
AC_DEFINE_UNQUOTED([ATTRIBUTE_ALIGNED_MAX],
[$ac_cv_c_attribute_aligned],[maximum supported data alignment])
fi
CFLAGS=$SAV_CFLAGS])
dnl AC_TRY_CFLAGS (CFLAGS, [ACTION-IF-WORKS], [ACTION-IF-FAILS])
dnl check if $CC supports a given set of cflags
AC_DEFUN([AC_TRY_CFLAGS],
[AC_MSG_CHECKING([if $CC supports $1 flags])
SAVE_CFLAGS="$CFLAGS"
CFLAGS="$1"
AC_TRY_COMPILE([],[],[ac_cv_try_cflags_ok=yes],[ac_cv_try_cflags_ok=no])
CFLAGS="$SAVE_CFLAGS"
AC_MSG_RESULT([$ac_cv_try_cflags_ok])
if test x"$ac_cv_try_cflags_ok" = x"yes"; then
ifelse([$2],[],[:],[$2])
else
ifelse([$3],[],[:],[$3])
fi])
dnl AC_LIBTOOL_NON_PIC ([ACTION-IF-WORKS], [ACTION-IF-FAILS])
dnl check for nonbuggy libtool -prefer-non-pic
AC_DEFUN([AC_LIBTOOL_NON_PIC],
[AC_MSG_CHECKING([if libtool supports -prefer-non-pic flag])
mkdir ac_test_libtool; cd ac_test_libtool; ac_cv_libtool_non_pic=no
echo "int g (int i); int f (int i) {return g (i);}" >f.c
echo "int (* hook) (int) = 0; int g (int i) {if (hook) i = hook (i); return i + 1;}" >g.c
../libtool --mode=compile $CC $CFLAGS -prefer-non-pic \
-c f.c >/dev/null 2>&1 && \
../libtool --mode=compile $CC $CFLAGS -prefer-non-pic \
-c g.c >/dev/null 2>&1 && \
../libtool --mode=link $CC $CFLAGS -prefer-non-pic -o libfoo.la \
-rpath / f.lo g.lo >/dev/null 2>&1 &&
ac_cv_libtool_non_pic=yes
cd ..; rm -fr ac_test_libtool; AC_MSG_RESULT([$ac_cv_libtool_non_pic])
if test x"$ac_cv_libtool_non_pic" = x"yes"; then
ifelse([$1],[],[:],[$1])
else
ifelse([$2],[],[:],[$2])
fi])
dnl AC_CHECK_GENERATE_INTTYPES_H (INCLUDE-DIRECTORY)
dnl generate a default inttypes.h if the header file does not exist already
AC_DEFUN([AC_CHECK_GENERATE_INTTYPES],
[rm -f $1/inttypes.h
AC_CHECK_HEADER([inttypes.h],[],[AX_CREATE_STDINT_H([$1/inttypes.h])])])
dnl from http://ac-archive.sourceforge.net/guidod/ax_create_stdint_h.html
dnl modified: s/AC_COMPILE_CHECK_SIZEOF/AC_CHECK_SIZEOF/g
dnl @synopsis AX_CREATE_STDINT_H [( HEADER-TO-GENERATE [, HEDERS-TO-CHECK])]
dnl
dnl the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the
dnl existence of an include file <stdint.h> that defines a set of
dnl typedefs, especially uint8_t,int32_t,uintptr_t.
dnl Many older installations will not provide this file, but some will
dnl have the very same definitions in <inttypes.h>. In other enviroments
dnl we can use the inet-types in <sys/types.h> which would define the
dnl typedefs int8_t and u_int8_t respectivly.
dnl
dnl This macros will create a local "_stdint.h" or the headerfile given as
dnl an argument. In many cases that file will just "#include <stdint.h>"
dnl or "#include <inttypes.h>", while in other environments it will provide
dnl the set of basic 'stdint's definitions/typedefs:
dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t
dnl int_least32_t.. int_fast32_t.. intmax_t
dnl which may or may not rely on the definitions of other files,
dnl or using the AC_CHECK_SIZEOF macro to determine the actual
dnl sizeof each type.
dnl
dnl if your header files require the stdint-types you will want to create an
dnl installable file mylib-int.h that all your other installable header
dnl may include. So if you have a library package named "mylib", just use
dnl AX_CREATE_STDINT_H(mylib-int.h)
dnl in configure.ac and go to install that very header file in Makefile.am
dnl along with the other headers (mylib.h) - and the mylib-specific headers
dnl can simply use "#include <mylib-int.h>" to obtain the stdint-types.
dnl
dnl Remember, if the system already had a valid <stdint.h>, the generated
dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things...
dnl
dnl @, (status: used on new platforms) (see http://ac-archive.sf.net/gstdint/)
dnl @version $Id: acinclude.m4,v 1.11 2003/10/04 05:38:30 walken Exp $
dnl @author Guido Draheim <guidod@gmx.de>
AC_DEFUN([AX_CREATE_STDINT_H],
[# ------ AX CREATE STDINT H -------------------------------------
AC_MSG_CHECKING([for stdint types])
ac_stdint_h=`echo ifelse($1, , _stdint.h, $1)`
# try to shortcircuit - if the default include path of the compiler
# can find a "stdint.h" header then we assume that all compilers can.
AC_CACHE_VAL([ac_cv_header_stdint_t],[
old_CXXFLAGS="$CXXFLAGS" ; CXXFLAGS=""
old_CPPFLAGS="$CPPFLAGS" ; CPPFLAGS=""
old_CFLAGS="$CFLAGS" ; CFLAGS=""
AC_TRY_COMPILE([#include <stdint.h>],[int_least32_t v = 0;],
[ac_cv_stdint_result="(assuming C99 compatible system)"
ac_cv_header_stdint_t="stdint.h"; ],
[ac_cv_header_stdint_t=""])
CXXFLAGS="$old_CXXFLAGS"
CPPFLAGS="$old_CPPFLAGS"
CFLAGS="$old_CFLAGS" ])
v="... $ac_cv_header_stdint_h"
if test "$ac_stdint_h" = "stdint.h" ; then
AC_MSG_RESULT([(are you sure you want them in ./stdint.h?)])
elif test "$ac_stdint_h" = "inttypes.h" ; then
AC_MSG_RESULT([(are you sure you want them in ./inttypes.h?)])
elif test "_$ac_cv_header_stdint_t" = "_" ; then
AC_MSG_RESULT([(putting them into $ac_stdint_h)$v])