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