LAME 3.xx    January 2001  Mark Taylor (http://www.mp3dev.org)

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Compile time options

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There are serveral targets which can be built from this

source code:

lame, lame.exe  The command line encoder

mp3x            A GTK based graphical MP3 frame analyzer.  For debugging,

                development, and studing MP3 frames produced by any

                encoder.

lame_enc.dll    a Windows DLL used by many GUIs which support lame.

                (Can only be compiled by MSVC???)

lame.acm        *** DEPRECATED ***

                a Windows ACM codec which can be used by many windows programs, 

                and any directshow program. See MSVC project files in ACM 

                directory. Right click on lame.inf to install.

lame_enc.dshow  a Windows direct show filter for lame.  Potentially has

                more flexability than the ACM codec, but code needs some

                work.  See MSVC project files in dshow directory

libmp3lame.a    the static encoding library used by all platforms, required

                by all the above targets.

libmp3lame.so   shared version of libmp3lame.a for *NIX platforms

The following compile time options can be used.  For libmp3lame.a and 

lame_enc.dll, none are required.  On non-unix systems, these options must 

be set in config.h or in the IDE.  

On unix systems, they are set via ./configure.  

#define HAVE_MPGLIB   compile in mpglib's mp3 *decoding* capibility

#define HAVE_VORBIS   compile in Vorbis decoding capibility

                      (you need libvorbis already built)

#define NOANALYSIS    do not compile in hooks used by the 

                      MP3 frame analyzer.

Options for the command line encoder:

#define LIBSNDFILE    to use Erik de Castro Lopo's libsndfile

                      for input.

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Building the software on *NIX platforms using configure:

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Run the following commands:

% ./configure

% make

% make install

For a complete list of options, try "./configure --help"

Some of the more usefull options:

For the encoding library:

  --enable-mp3x               Build the mp3 frame analyzer, 'mp3x'

  --enable-mp3rtp             Build the encode-to-RTP program, 'mp3rtp'

                              (broken as of August 2001)

For the LAME front end encoder:

  --with-fileio=lame          Use lame's internal file io routines [default]

               =sndfile       Use Erik de Castro Lopo's libsndfile (Supports 

                              many more input formats, but no stdin possible 

                              currently)

  --with-sndfile-prefix=DIR   Alternate location for libsndfile

                              (if --with-fileio=sndfile)

Other usefull configure options:

  --enable-debug              Build a debug version

  --enable-expopt             Enable some more optimizations flags for

                              the compiler, may or may not produce

                              faster code

  --prefix = PATH             default is /usr/local

                              (LAME currently installs:

                                /usr/local/bin/lame

                                /usr/local/lib/libmp3lame.a

                                /usr/local/lib/libmp3lame.so

                                /usr/local/include/lame.h

  --with-vorbis                Enable Ogg Vorbis decoding support

  --with-vorbis-prefix = PATH  specify where to find Vorbis libs

Some more advanced ways to influence the build procedure

(experienced users only, use it at your own risk):

  - If you want to use some custom defines for building (e.g. some out

    of the file "DEFINES") use:

     * bourne shell or compatible (ash, bash, zsh, ...):

       CONFIG_DEFS="-Dmy_define" ./configure

     * C shell or compatible (csh, tcsh, ...):

       setenv CONFIG_DEFS "-Dmy_define"

       ./configure

  - If you want to use some additional options for the compiler:

    * bourne shell or compatible (ash, bash, zsh, ...):

      CFLAGS="--my_flag" ./configure

    * C shell or compatible (csh, tcsh, ...):

      setenv CFLAGS "--my_flag"

      ./configure

  Or some combination of the above.

  Note:

    If configure detects the presents of "nasm" some additional speed

    improvements get compiled in (additional assembler code to detect

    and use multimedia extensions of the used processor).

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Building the software on *NIX platforms without configure:

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% make -f Makefile.unix

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Building the software on Windows with MSVC:

(or MSVC + 3rd party C compiler such as ICL)

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There are MSVC project files, and a Makefile.MSVC included with the 

project.  For production use, be sure to compile a "Release" target, 

with the "maximum speed" compile option, and #define NDEBUG.   

It is possible to compile the GTK frame analyzer under windows, see

README.WINGTK

Various build options can be set in configMS.h

Note: project files for building lame.exe seem to be broken or not

quite compatable with MSVC6.  The most reliable way to build lame and

lame_enc.dll is to run the .bat script (comes with MSVC6) which sets

up your VC environment to work from the command line, and then:

copy configMS.h config.h 

nmake -f Makefile.MSVC  comp=msvc  asm=no

Project files for the dll, ACM codec and directshow filter 

seem to be in better sahpe.  

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Building the software on Windows with free compilers:

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LAME can be compiled with various Windows ports (all free) of GCC (DJGPP, 

Mingw32).  See README.DJGPP.  

For Mingw32, you should now be able to use the Unix Makefile that

comes with LAME.  Try: "make -f Makefile.unix UNAME=MSDOS"

You may need to remove these lines from brhist.c:

#ifdef _WIN32

COORD Pos;

HANDLE CH;

CONSOLE_SCREEN_BUFFER_INFO CSBI;

#endif

Mingw32 users may also try to use the unix configure script (explained

above), it has _untested_ support for Mingw32.

Cygwin users should use the unix configure script (explained above). If

you have problems with the configure script try:

      CC=gcc ./configure

Patches to enable the build of the lame_enc.dll with Cygwin and autoconf /

automake / libtool are welcome!

To use the Borland C compiler (now free!) see README.B32 and Makefile.B32.

Borland can also compile the lame_enc.dll, but this is untested.

Can DJGPP or Mingw32 produce lame_enc.dll?

Various build options can be set in configMS.h