fec.h

   1 /** \file fec.h Exported symbols from fec.c. */
   2
   3 /*
   4  * 980614
   5  * (C) 1997-98 Luigi Rizzo (luigi@iet.unipi.it)
   6  *
   7  * Portions derived from code by Phil Karn (karn@ka9q.ampr.org),
   8  * Robert Morelos-Zaragoza (robert@spectra.eng.hawaii.edu) and Hari
   9  * Thirumoorthy (harit@spectra.eng.hawaii.edu), Aug 1995
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above
  18  *    copyright notice, this list of conditions and the following
  19  *    disclaimer in the documentation and/or other materials
  20  *    provided with the distribution.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  24  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  25  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS
  26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
  27  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  28  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
  29  * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
  31  * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  33  * OF SUCH DAMAGE.
  34  */
  35
  36 /** Each FEC slice contains a FEC header of this size. */
  37 #define FEC_HEADER_SIZE 32
  38 /** The FEC header starts with this magic value. */
  39 #define FEC_MAGIC 0xFECC0DEC
  40
  41 struct fec_parms;
  42
  43 int fec_new(int k, int n, struct fec_parms **parms);
  44 void fec_free(struct fec_parms *p);
  45 void fec_encode(struct fec_parms *parms, const unsigned char * const *src,
  46                 unsigned char *dst, int idx, int sz);
  47 int fec_decode(struct fec_parms *parms, unsigned char **data, int *idx,
  48                 int sz);