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