README - platform/external/flac - Gitiles

 /* FLAC - Free Lossless Audio Codec
  * Copyright (C) 2001,2002  Josh Coalson
  *
  * This program is part of FLAC; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
  * as published by the Free Software Foundation; either version 2
  * of the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  */


 FLAC (http://flac.sourceforge.net/) is an Open Source lossless audio
 codec developed by Josh Coalson.

 FLAC is comprised of
   * `libFLAC', a library which implements reference encoders and
     decoders, and a metadata interface
   * `libFLAC++', a C++ object wrapper library around libFLAC
   * `libOggFLAC' and `libOggFLAC++', which provide encoders and
     decoders for FLAC streams in an Ogg container
   * `flac', a command-line program for encoding and decoding files
   * `metaflac', a command-line program for editing FLAC metadata
   * player plugins for XMMS and Winamp
   * user and API documentation

 The libraries (libFLAC, libFLAC++, libOggFLAC, and libOggFLAC++) are
 licensed under the GNU Lesser General Public License (LGPL).  All other
 programs and plugins are licensed under the GNU General Public License
 (GPL).  The documentation is licensed under the GNU Free Documentation
 License (GFDL).


 ===============================================================================
 FLAC - 1.0.3 - Contents
 ===============================================================================

 - Introduction
 - Building in a GNU environment
 - Building with Makefile.lite
 - Building with MSVC
 - Building on Mac OS X
 - Note to embedded developers


 ===============================================================================
 Introduction
 ===============================================================================

 This is the source release for the FLAC project.  See

 	doc/index.html

 for full documentation.

 A brief description of the directory tree:

 	doc/          the HTML documentation
 	flac.pbproj/  the Mac OS X Project Builder project
 	include/      public include files for libFLAC and libFLAC++
 	man/          the man page for `flac'
 	src/          the source code and private headers
 	test/         the test scripts


 ===============================================================================
 Building in a GNU environment
 ===============================================================================

 FLAC uses autoconf and libtool for configuring and building.
 Better documentation for these will be forthcoming, but in
 general, this should work:

 ./configure && make && make check && make install

 The 'make check' step is optional; omit it to skip all the tests,
 which can take several hours.

 NOTE: Despite our best efforts it's entirely possible to have
 problems when using older versions of autoconf, automake, or
 libtool.  If you have the latest versions and still can't get it
 to work, see the next section on Makefile.lite.

 There are a few FLAC-specific arguments you can give to
 `configure':

 --enable-debug : Builds everything with debug symbols and some
 extra (and more verbose) error checking.

 --disable-asm-optimizations : Disables the compilation of the
 assembly routines.  Many routines have assembly versions for
 speed and `configure' is pretty good about knowing what is
 supported, but you can use this option to build only from the
 C sources.

 --enable-sse : If you are building for an x86 CPU that supports
 SSE instructions, you can enable some of the faster routines
 if your operating system also supports SSE instructions.  flac
 can tell if the CPU supports the instructions but currently has
 no way to test if the OS does, so if it does, you must pass
 this argument to configure to use the SSE routines.  If flac
 crashes when built with this option you will have to go back and
 configure without --enable-sse.  Note that
 --disable-asm-optimizations implies --disable-sse.

 --enable-3dnow : If you are building for an AMD CPU which has 3DNOW!
 support, you can use this flag to enable some assembly routines
 which use 3DNOW! instructions.  There have been some reports that
 they may cause flac to crash, which is why it is not turned on
 by default.  Note that --disable-asm-optimizations overrides
 --enable-3dnow.


 ===============================================================================
 Building with Makefile.lite
 ===============================================================================

 There is a more lightweight build system for do-it-yourself-ers.
 It is also useful if configure isn't working, which may be the
 case since lately we've had some problems with different versions
 of automake and libtool.  The Makefile.lite system should work
 on Gnu systems with few or no adjustments.

 From the top level just 'make -f Makefile.lite'.  You can
 specify zero or one optional target from 'release', 'debug',
 'test', or 'clean'.  The default is 'release'.  There is no
 'install' target but everything you need will end up in the
 obj/ directory.

 If you are not on an x86 system or you don't have nasm, you
 may have to change the DEFINES in src/libFLAC/Makefile.lite.  If
 you don't have nasm, remove -DFLAC__HAS_NASM.  If your target is
 not an x86, change -DFLAC__CPU_IA32 to -DFLAC__CPU_UNKNOWN.


 ===============================================================================
 Building with MSVC
 ===============================================================================

 There is no overall make system for MSVC but the individual
 source directories with a 'Makefile.vc' file in them allow
 building with MSVC.  Just 'nmake /f Makefile.vc'.  Currently
 the Makefile.vc for libFLAC is hardcoded to use nasm.  If
 you don't have nasm, or don't want any assembly optimizations,
 edit the makefile, adding '/D FLAC__NO_ASM', and delete the
 rules which compile the .nasm files.


 ===============================================================================
 Building on Mac OS X
 ===============================================================================

 If you have Fink, the Gnu flow above should work.  Otherwise,
 there is a Project Builder project in the top-level source
 directory to build libFLAC and the command-line utilities on
 Mac OS X.  In a terminal, cd to the top-level directory (the
 one that contains this README file) and type:

 	pbxbuild -alltargets

 This will create everything and leave it in the build/ directory.
 Don't worry about the rest of the stuff that is in build/ or
 the stuff that was already there before building.

 There currently is no install procedure; you will have to
 manually copy the tools to wherever you need them.


 ===============================================================================
 Note to embedded developers
 ===============================================================================

 libFLAC has grown larger over time as more functionality has been
 included, but much of it may be unnecessary for a particular embedded
 implementation.  Unused parts may be pruned by some simple editing of
 configure.in and src/libFLAC/Makefile.am; the following dependency
 graph shows which modules may be pruned without breaking things
 further down:

 file_encoder.h
 	stream_encoder.h
 		format.h

 file_decoder.h
 	seekable_stream_decoder.h
 		stream_decoder.h
 			format.h

 metadata.h
 	format.h

 There is a section dedicated to embedded use in the libFLAC API
 HTML documentation (see doc/html/api/index.html).
	/* FLAC - Free Lossless Audio Codec
	* Copyright (C) 2001,2002 Josh Coalson
	*
	* This program is part of FLAC; you can redistribute it and/or
	* modify it under the terms of the GNU General Public License
	* as published by the Free Software Foundation; either version 2
	* of the License, or (at your option) any later version.
	*
	* This program is distributed in the hope that it will be useful,
	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	* GNU General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	*/


	FLAC (http://flac.sourceforge.net/) is an Open Source lossless audio
	codec developed by Josh Coalson.

	FLAC is comprised of
	* `libFLAC', a library which implements reference encoders and
	decoders, and a metadata interface
	* `libFLAC++', a C++ object wrapper library around libFLAC
	* `libOggFLAC' and `libOggFLAC++', which provide encoders and
	decoders for FLAC streams in an Ogg container
	* `flac', a command-line program for encoding and decoding files
	* `metaflac', a command-line program for editing FLAC metadata
	* player plugins for XMMS and Winamp
	* user and API documentation

	The libraries (libFLAC, libFLAC++, libOggFLAC, and libOggFLAC++) are
	licensed under the GNU Lesser General Public License (LGPL). All other
	programs and plugins are licensed under the GNU General Public License
	(GPL). The documentation is licensed under the GNU Free Documentation
	License (GFDL).


	===============================================================================
	FLAC - 1.0.3 - Contents
	===============================================================================

	- Introduction
	- Building in a GNU environment
	- Building with Makefile.lite
	- Building with MSVC
	- Building on Mac OS X
	- Note to embedded developers


	===============================================================================
	Introduction
	===============================================================================

	This is the source release for the FLAC project. See

	doc/index.html

	for full documentation.

	A brief description of the directory tree:

	doc/ the HTML documentation
	flac.pbproj/ the Mac OS X Project Builder project
	include/ public include files for libFLAC and libFLAC++
	man/ the man page for `flac'
	src/ the source code and private headers
	test/ the test scripts


	===============================================================================
	Building in a GNU environment
	===============================================================================

	FLAC uses autoconf and libtool for configuring and building.
	Better documentation for these will be forthcoming, but in
	general, this should work:

	./configure && make && make check && make install

	The 'make check' step is optional; omit it to skip all the tests,
	which can take several hours.

	NOTE: Despite our best efforts it's entirely possible to have
	problems when using older versions of autoconf, automake, or
	libtool. If you have the latest versions and still can't get it
	to work, see the next section on Makefile.lite.

	There are a few FLAC-specific arguments you can give to
	`configure':

	--enable-debug : Builds everything with debug symbols and some
	extra (and more verbose) error checking.

	--disable-asm-optimizations : Disables the compilation of the
	assembly routines. Many routines have assembly versions for
	speed and `configure' is pretty good about knowing what is
	supported, but you can use this option to build only from the
	C sources.

	--enable-sse : If you are building for an x86 CPU that supports
	SSE instructions, you can enable some of the faster routines
	if your operating system also supports SSE instructions. flac
	can tell if the CPU supports the instructions but currently has
	no way to test if the OS does, so if it does, you must pass
	this argument to configure to use the SSE routines. If flac
	crashes when built with this option you will have to go back and
	configure without --enable-sse. Note that
	--disable-asm-optimizations implies --disable-sse.

	--enable-3dnow : If you are building for an AMD CPU which has 3DNOW!
	support, you can use this flag to enable some assembly routines
	which use 3DNOW! instructions. There have been some reports that
	they may cause flac to crash, which is why it is not turned on
	by default. Note that --disable-asm-optimizations overrides
	--enable-3dnow.


	===============================================================================
	Building with Makefile.lite
	===============================================================================

	There is a more lightweight build system for do-it-yourself-ers.
	It is also useful if configure isn't working, which may be the
	case since lately we've had some problems with different versions
	of automake and libtool. The Makefile.lite system should work
	on Gnu systems with few or no adjustments.

	From the top level just 'make -f Makefile.lite'. You can
	specify zero or one optional target from 'release', 'debug',
	'test', or 'clean'. The default is 'release'. There is no
	'install' target but everything you need will end up in the
	obj/ directory.

	If you are not on an x86 system or you don't have nasm, you
	may have to change the DEFINES in src/libFLAC/Makefile.lite. If
	you don't have nasm, remove -DFLAC__HAS_NASM. If your target is
	not an x86, change -DFLAC__CPU_IA32 to -DFLAC__CPU_UNKNOWN.


	===============================================================================
	Building with MSVC
	===============================================================================

	There is no overall make system for MSVC but the individual
	source directories with a 'Makefile.vc' file in them allow
	building with MSVC. Just 'nmake /f Makefile.vc'. Currently
	the Makefile.vc for libFLAC is hardcoded to use nasm. If
	you don't have nasm, or don't want any assembly optimizations,
	edit the makefile, adding '/D FLAC__NO_ASM', and delete the
	rules which compile the .nasm files.


	===============================================================================
	Building on Mac OS X
	===============================================================================

	If you have Fink, the Gnu flow above should work. Otherwise,
	there is a Project Builder project in the top-level source
	directory to build libFLAC and the command-line utilities on
	Mac OS X. In a terminal, cd to the top-level directory (the
	one that contains this README file) and type:

	pbxbuild -alltargets

	This will create everything and leave it in the build/ directory.
	Don't worry about the rest of the stuff that is in build/ or
	the stuff that was already there before building.

	There currently is no install procedure; you will have to
	manually copy the tools to wherever you need them.


	===============================================================================
	Note to embedded developers
	===============================================================================

	libFLAC has grown larger over time as more functionality has been
	included, but much of it may be unnecessary for a particular embedded
	implementation. Unused parts may be pruned by some simple editing of
	configure.in and src/libFLAC/Makefile.am; the following dependency
	graph shows which modules may be pruned without breaking things
	further down:

	file_encoder.h
	stream_encoder.h
	format.h

	file_decoder.h
	seekable_stream_decoder.h
	stream_decoder.h
	format.h

	metadata.h
	format.h

	There is a section dedicated to embedded use in the libFLAC API
	HTML documentation (see doc/html/api/index.html).