mp3decoder

MP3 decoder for teaching. http://www.bjrn.se/mp3dec

Latest on Hackage:0.0.1

This package is not currently in any snapshots. If you're interested in using it, we recommend adding it to Stackage Nightly. Doing so will make builds more reliable, and allow stackage.org to host generated Haddocks.

OtherLicense licensed by Bjorn Edstrom
Maintained by be@bjrn.se

=== Prereq. ===

Using this code requires:

*) A Haskell compiler, such as GHC.

*) binary-strict, from here:
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/binary-strict
If you've never used Haskell before, install binary-strict by
downloading and unpacking the source, cd to the directory where the
Setup file is, and do

$ runhaskell Setup.lhs configure
$ runhaskell Setup.lhs build
$ runhaskell Setup.lhs install

That's it.



=== Building the decoder ===

Building the decoder works almost the same as building binary-strict.
From the directory where this file is, do:

$ runhaskell Setup.lhs configure
$ runhaskell Setup.lhs build

Do not install it (if you're familiar with Haskell and for some reason
want to install this decoder as a library, you'll have to edit the
cabal file).

When done, there will be an executable file in dist/build/mp3driver.
Pass an MP3 file to it

$ mp3driver test.mp3

And it will write a file, "out.wav", to the current directory.

The actual decoder is in Codec/Audio/MP3. Change parts of it, run
the build command again, and see what happens. :-)



=== Trouble? ===

If, for some reason, the above doesn't work, there's a manual method
of building the mp3driver program. Copy all *.hs, *.h and *.c files
to the same directory. Build the two C files:

$ gcc -O2 -c c_imdct.c
$ gcc -O2 -c c_synth.c

Change all "import Codec.Audio.MP3.XXX" in the Haskell source files
to "import XXX". Then:

$ ghc c_imdct.o c_synth.o --make Driver.hs

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