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comparison: media/libopus/celt/mfrngcod.h
media/libopus/celt/mfrngcod.h
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| 1 /* Copyright (c) 2001-2008 Timothy B. Terriberry | |
| 2 Copyright (c) 2008-2009 Xiph.Org Foundation */ | |
| 3 /* | |
| 4 Redistribution and use in source and binary forms, with or without | |
| 5 modification, are permitted provided that the following conditions | |
| 6 are met: | |
| 7 | |
| 8 - Redistributions of source code must retain the above copyright | |
| 9 notice, this list of conditions and the following disclaimer. | |
| 10 | |
| 11 - Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 | |
| 15 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 16 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 17 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 18 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
| 19 OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 20 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 21 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 22 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| 23 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| 24 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 25 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 26 */ | |
| 27 | |
| 28 #if !defined(_mfrngcode_H) | |
| 29 # define _mfrngcode_H (1) | |
| 30 # include "entcode.h" | |
| 31 | |
| 32 /*Constants used by the entropy encoder/decoder.*/ | |
| 33 | |
| 34 /*The number of bits to output at a time.*/ | |
| 35 # define EC_SYM_BITS (8) | |
| 36 /*The total number of bits in each of the state registers.*/ | |
| 37 # define EC_CODE_BITS (32) | |
| 38 /*The maximum symbol value.*/ | |
| 39 # define EC_SYM_MAX ((1U<<EC_SYM_BITS)-1) | |
| 40 /*Bits to shift by to move a symbol into the high-order position.*/ | |
| 41 # define EC_CODE_SHIFT (EC_CODE_BITS-EC_SYM_BITS-1) | |
| 42 /*Carry bit of the high-order range symbol.*/ | |
| 43 # define EC_CODE_TOP (((opus_uint32)1U)<<(EC_CODE_BITS-1)) | |
| 44 /*Low-order bit of the high-order range symbol.*/ | |
| 45 # define EC_CODE_BOT (EC_CODE_TOP>>EC_SYM_BITS) | |
| 46 /*The number of bits available for the last, partial symbol in the code field.*/ | |
| 47 # define EC_CODE_EXTRA ((EC_CODE_BITS-2)%EC_SYM_BITS+1) | |
| 48 #endif |
