biariencode.h
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上传日期:2021-12-09
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文件大小:5k
源码类别:
Audio
开发平台:
Visual C++
- /*!
- ***************************************************************************
- * file
- * biariencode.h
- *
- * brief
- * Headerfile for binary arithmetic encoding routines
- *
- * author
- * - Detlev Marpe
- * - Gabi Blaettermann
- * - Gunnar Marten
- *
- * Copyright (C) 2000 HEINRICH HERTZ INSTITUTE All Rights Reserved.
- *
- * date
- * 21. Oct 2000
- **************************************************************************
- */
- #ifndef _BIARIENCOD_H_
- #define _BIARIENCOD_H_
- /************************************************************************
- * D e f i n i t i o n s
- ***********************************************************************
- */
- // some definitions to increase the readability of the source code
- #define Elow (eep->Elow)
- #define Erange (eep->Erange)
- #define Ebuffer (eep->Ebuffer)
- #define Ebits_to_go (eep->Ebits_to_go)
- #define Ecodestrm (eep->Ecodestrm)
- #define Ecodestrm_len (eep->Ecodestrm_len)
- #define Ecodestrm_laststartcode (eep->Ecodestrm_laststartcode)
- #define B_BITS 10 // Number of bits to represent the whole coding interval
- #define Echunks_outstanding (eep->Echunks_outstanding)
- #define Epbuf (eep->Epbuf)
- #define BITS_TO_LOAD 16
- #define MAX_BITS (B_BITS + BITS_TO_LOAD)
- #define ONE (1 << MAX_BITS)
- #define HALF (1 << (B_BITS-1))
- #define QUARTER (1 << (B_BITS-2))
- #define MIN_BITS_TO_GO 0
- #define B_LOAD_MASK ((1<<BITS_TO_LOAD) - 1)
- // Range table for LPS
- const byte rLPS_table_64x4[64][4]=
- {
- { 128, 176, 208, 240},
- { 128, 167, 197, 227},
- { 128, 158, 187, 216},
- { 123, 150, 178, 205},
- { 116, 142, 169, 195},
- { 111, 135, 160, 185},
- { 105, 128, 152, 175},
- { 100, 122, 144, 166},
- { 95, 116, 137, 158},
- { 90, 110, 130, 150},
- { 85, 104, 123, 142},
- { 81, 99, 117, 135},
- { 77, 94, 111, 128},
- { 73, 89, 105, 122},
- { 69, 85, 100, 116},
- { 66, 80, 95, 110},
- { 62, 76, 90, 104},
- { 59, 72, 86, 99},
- { 56, 69, 81, 94},
- { 53, 65, 77, 89},
- { 51, 62, 73, 85},
- { 48, 59, 69, 80},
- { 46, 56, 66, 76},
- { 43, 53, 63, 72},
- { 41, 50, 59, 69},
- { 39, 48, 56, 65},
- { 37, 45, 54, 62},
- { 35, 43, 51, 59},
- { 33, 41, 48, 56},
- { 32, 39, 46, 53},
- { 30, 37, 43, 50},
- { 29, 35, 41, 48},
- { 27, 33, 39, 45},
- { 26, 31, 37, 43},
- { 24, 30, 35, 41},
- { 23, 28, 33, 39},
- { 22, 27, 32, 37},
- { 21, 26, 30, 35},
- { 20, 24, 29, 33},
- { 19, 23, 27, 31},
- { 18, 22, 26, 30},
- { 17, 21, 25, 28},
- { 16, 20, 23, 27},
- { 15, 19, 22, 25},
- { 14, 18, 21, 24},
- { 14, 17, 20, 23},
- { 13, 16, 19, 22},
- { 12, 15, 18, 21},
- { 12, 14, 17, 20},
- { 11, 14, 16, 19},
- { 11, 13, 15, 18},
- { 10, 12, 15, 17},
- { 10, 12, 14, 16},
- { 9, 11, 13, 15},
- { 9, 11, 12, 14},
- { 8, 10, 12, 14},
- { 8, 9, 11, 13},
- { 7, 9, 11, 12},
- { 7, 9, 10, 12},
- { 7, 8, 10, 11},
- { 6, 8, 9, 11},
- { 6, 7, 9, 10},
- { 6, 7, 8, 9},
- { 2, 2, 2, 2}
- };
- const byte AC_next_state_MPS_64[64] =
- {
- 1,2,3,4,5,6,7,8,9,10,
- 11,12,13,14,15,16,17,18,19,20,
- 21,22,23,24,25,26,27,28,29,30,
- 31,32,33,34,35,36,37,38,39,40,
- 41,42,43,44,45,46,47,48,49,50,
- 51,52,53,54,55,56,57,58,59,60,
- 61,62,62,63
- };
- const byte AC_next_state_LPS_64[64] =
- {
- 0, 0, 1, 2, 2, 4, 4, 5, 6, 7,
- 8, 9, 9,11,11,12,13,13,15,15,
- 16,16,18,18,19,19,21,21,22,22,
- 23,24,24,25,26,26,27,27,28,29,
- 29,30,30,30,31,32,32,33,33,33,
- 34,34,35,35,35,36,36,36,37,37,
- 37,38,38,63
- };
- const byte renorm_table_32[32]={6,5,4,4,3,3,3,3,2,2,2,2,2,2,2,2,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1};
- #endif // BIARIENCOD_H