jamulus/libs/celt/cc6_mfrngcod.h

/* (C) 2001-2008 Timothy B. Terriberry
   (C) 2008 Jean-Marc Valin */
/*
   Redistribution and use in source and binary forms, with or without
   modification, are permitted provided that the following conditions
   are met:

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   - Neither the name of the Xiph.org Foundation nor the names of its
   contributors may be used to endorse or promote products derived from
   this software without specific prior written permission.

   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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*/

#if !defined(cc6__mfrngcode_H)
# define cc6__mfrngcode_H (1)
# include "cc6_entcode.h"

/*Constants used by the entropy encoder/decoder.*/

/*The number of bits to output at a time.*/
# define cc6_EC_SYM_BITS   (8)
/*The total number of bits in each of the state registers.*/
# define cc6_EC_CODE_BITS  (32)
/*The maximum symbol value.*/
# define cc6_EC_SYM_MAX    ((1U<<cc6_EC_SYM_BITS)-1)
/*Bits to shift by to move a symbol into the high-order position.*/
# define cc6_EC_CODE_SHIFT (cc6_EC_CODE_BITS-cc6_EC_SYM_BITS-1)
/*Carry bit of the high-order range symbol.*/
# define cc6_EC_CODE_TOP   (((cc6_ec_uint32)1U)<<cc6_EC_CODE_BITS-1)
/*Low-order bit of the high-order range symbol.*/
# define cc6_EC_CODE_BOT   (cc6_EC_CODE_TOP>>cc6_EC_SYM_BITS)
/*Code for which propagating carries are possible.*/
# define cc6_EC_CODE_CARRY (((cc6_ec_uint32)cc6_EC_SYM_MAX)<<cc6_EC_CODE_SHIFT)
/*The number of bits available for the last, partial symbol in the code field.*/
# define cc6_EC_CODE_EXTRA ((cc6_EC_CODE_BITS-2)%cc6_EC_SYM_BITS+1)
/*A mask for the bits available in the coding buffer.
  This allows different platforms to use a variable with more bits, if it is
   convenient.
  We will only use cc6_EC_CODE_BITS of it.*/
# define cc6_EC_CODE_MASK  ((((cc6_ec_uint32)1U)<<cc6_EC_CODE_BITS-1)-1<<1|1)

#endif