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View Code? Open in Web Editor NEWECM (Error Code Modeler) encode/decode utilities.
ECM (Error Code Modeler) encode/decode utilities.
----------------------------------------------------------------------------- ECM (Error Code Modeler) encode/decode utilities Version 1.0 Copyright 2002 Neill Corlett Distributed under the terms of the GNU GPL; read source code for details ----------------------------------------------------------------------------- Introduction ------------ The ECM format allows you to reduce the size of a typical CD image file (BIN, CDI, NRG, CCD, or any other format that uses raw sectors; results may vary). It works by eliminating the Error Correction/Detection Codes (ECC/EDC) from each sector whenever possible. The encoder automatically adjusts to different sector types and automatically skips any headers it encounters. The results will vary depending on how much redundant ECC/EDC data is present. Note that for "cooked" ISO files, there will be no reduction. Setup / Usage ------------- Compile ecm.c and unecm.c if necessary, or use the included Win32 EXE files. Run ECM with no parameters to see a simple usage reference: usage: ecm cdimagefile [ecmfile] Where "cdimagefile" is the name of the CD image file, and "ecmfile" (optional) is the name of the ECM file. If you don't specify ecmfile, it defaults to cdimagefile plus a .ecm suffix. UNECM works the same way, but in reverse: usage: unecm ecmfile [outputfile] "ecmfile" must end in .ecm. If outputfile is not specified, it defaults to ecmfile minus the .ecm suffix. Thanks to --------- ProtoCat for inspiring me to write this. Where to find me ---------------- email: [email protected] www: http://lfx.org/~corlett/ -----------------------------------------------------------------------------
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