Chris@69: /* Copyright (c) 2001-2008 Timothy B. Terriberry
Chris@69:    Copyright (c) 2008-2009 Xiph.Org Foundation */
Chris@69: /*
Chris@69:    Redistribution and use in source and binary forms, with or without
Chris@69:    modification, are permitted provided that the following conditions
Chris@69:    are met:
Chris@69: 
Chris@69:    - Redistributions of source code must retain the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer.
Chris@69: 
Chris@69:    - Redistributions in binary form must reproduce the above copyright
Chris@69:    notice, this list of conditions and the following disclaimer in the
Chris@69:    documentation and/or other materials provided with the distribution.
Chris@69: 
Chris@69:    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
Chris@69:    ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
Chris@69:    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
Chris@69:    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
Chris@69:    OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
Chris@69:    EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
Chris@69:    PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
Chris@69:    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
Chris@69:    LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
Chris@69:    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
Chris@69:    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Chris@69: */
Chris@69: 
Chris@69: #if !defined(_mfrngcode_H)
Chris@69: # define _mfrngcode_H (1)
Chris@69: # include "entcode.h"
Chris@69: 
Chris@69: /*Constants used by the entropy encoder/decoder.*/
Chris@69: 
Chris@69: /*The number of bits to output at a time.*/
Chris@69: # define EC_SYM_BITS   (8)
Chris@69: /*The total number of bits in each of the state registers.*/
Chris@69: # define EC_CODE_BITS  (32)
Chris@69: /*The maximum symbol value.*/
Chris@69: # define EC_SYM_MAX    ((1U<<EC_SYM_BITS)-1)
Chris@69: /*Bits to shift by to move a symbol into the high-order position.*/
Chris@69: # define EC_CODE_SHIFT (EC_CODE_BITS-EC_SYM_BITS-1)
Chris@69: /*Carry bit of the high-order range symbol.*/
Chris@69: # define EC_CODE_TOP   (((opus_uint32)1U)<<(EC_CODE_BITS-1))
Chris@69: /*Low-order bit of the high-order range symbol.*/
Chris@69: # define EC_CODE_BOT   (EC_CODE_TOP>>EC_SYM_BITS)
Chris@69: /*The number of bits available for the last, partial symbol in the code field.*/
Chris@69: # define EC_CODE_EXTRA ((EC_CODE_BITS-2)%EC_SYM_BITS+1)
Chris@69: #endif