www.pudn.com > core.rar > cabac.c
/*****************************************************************************
* cabac.c: h264 encoder library
*****************************************************************************
* Copyright (C) 2003 Laurent Aimar
* $Id: cabac.c,v 1.5 2004/03/26 14:40:25 fenrir Exp $
*
* Authors: Laurent Aimar
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
#include
#include
#include
#include
#include "common.h"
//#define TRACE 1
/* Debugging purpose ONLY !!!! */
#ifdef TRACE
static int binCount = 0;
#endif
static const int x264_cabac_context_init_I[399][2] =
{
/* 0 - 10 */
{ 20, -15 }, { 2, 54 }, { 3, 74 }, { 20, -15 },
{ 2, 54 }, { 3, 74 }, { -28,127 }, { -23, 104 },
{ -6, 53 }, { -1, 54 }, { 7, 51 },
/* 11 - 23 unsused for I */
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 },
/* 24- 39 */
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
/* 40 - 53 */
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 },
/* 54 - 59 */
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 0, 0 }, { 0, 0 },
/* 60 - 69 */
{ 0, 41 }, { 0, 63 }, { 0, 63 }, { 0, 63 },
{ -9, 83 }, { 4, 86 }, { 0, 97 }, { -7, 72 },
{ 13, 41 }, { 3, 62 },
/* 70 -> 87 */
{ 0, 11 }, { 1, 55 }, { 0, 69 }, { -17, 127 },
{ -13, 102 },{ 0, 82 }, { -7, 74 }, { -21, 107 },
{ -27, 127 },{ -31, 127 },{ -24, 127 }, { -18, 95 },
{ -27, 127 },{ -21, 114 },{ -30, 127 }, { -17, 123 },
{ -12, 115 },{ -16, 122 },
/* 88 -> 104 */
{ -11, 115 },{ -12, 63 }, { -2, 68 }, { -15, 84 },
{ -13, 104 },{ -3, 70 }, { -8, 93 }, { -10, 90 },
{ -30, 127 },{ -1, 74 }, { -6, 97 }, { -7, 91 },
{ -20, 127 },{ -4, 56 }, { -5, 82 }, { -7, 76 },
{ -22, 125 },
/* 105 -> 135 */
{ -7, 93 }, { -11, 87 }, { -3, 77 }, { -5, 71 },
{ -4, 63 }, { -4, 68 }, { -12, 84 }, { -7, 62 },
{ -7, 65 }, { 8, 61 }, { 5, 56 }, { -2, 66 },
{ 1, 64 }, { 0, 61 }, { -2, 78 }, { 1, 50 },
{ 7, 52 }, { 10, 35 }, { 0, 44 }, { 11, 38 },
{ 1, 45 }, { 0, 46 }, { 5, 44 }, { 31, 17 },
{ 1, 51 }, { 7, 50 }, { 28, 19 }, { 16, 33 },
{ 14, 62 }, { -13, 108 },{ -15, 100 },
/* 136 -> 165 */
{ -13, 101 },{ -13, 91 }, { -12, 94 }, { -10, 88 },
{ -16, 84 }, { -10, 86 }, { -7, 83 }, { -13, 87 },
{ -19, 94 }, { 1, 70 }, { 0, 72 }, { -5, 74 },
{ 18, 59 }, { -8, 102 }, { -15, 100 }, { 0, 95 },
{ -4, 75 }, { 2, 72 }, { -11, 75 }, { -3, 71 },
{ 15, 46 }, { -13, 69 }, { 0, 62 }, { 0, 65 },
{ 21, 37 }, { -15, 72 }, { 9, 57 }, { 16, 54 },
{ 0, 62 }, { 12, 72 },
/* 166 -> 196 */
{ 24, 0 }, { 15, 9 }, { 8, 25 }, { 13, 18 },
{ 15, 9 }, { 13, 19 }, { 10, 37 }, { 12, 18 },
{ 6, 29 }, { 20, 33 }, { 15, 30 }, { 4, 45 },
{ 1, 58 }, { 0, 62 }, { 7, 61 }, { 12, 38 },
{ 11, 45 }, { 15, 39 }, { 11, 42 }, { 13, 44 },
{ 16, 45 }, { 12, 41 }, { 10, 49 }, { 30, 34 },
{ 18, 42 }, { 10, 55 }, { 17, 51 }, { 17, 46 },
{ 0, 89 }, { 26, -19 }, { 22, -17 },
/* 197 -> 226 */
{ 26, -17 }, { 30, -25 }, { 28, -20 }, { 33, -23 },
{ 37, -27 }, { 33, -23 }, { 40, -28 }, { 38, -17 },
{ 33, -11 }, { 40, -15 }, { 41, -6 }, { 38, 1 },
{ 41, 17 }, { 30, -6 }, { 27, 3 }, { 26, 22 },
{ 37, -16 }, { 35, -4 }, { 38, -8 }, { 38, -3 },
{ 37, 3 }, { 38, 5 }, { 42, 0 }, { 35, 16 },
{ 39, 22 }, { 14, 48 }, { 27, 37 }, { 21, 60 },
{ 12, 68 }, { 2, 97 },
/* 227 -> 251 */
{ -3, 71 }, { -6, 42 }, { -5, 50 }, { -3, 54 },
{ -2, 62 }, { 0, 58 }, { 1, 63 }, { -2, 72 },
{ -1, 74 }, { -9, 91 }, { -5, 67 }, { -5, 27 },
{ -3, 39 }, { -2, 44 }, { 0, 46 }, { -16, 64 },
{ -8, 68 }, { -10, 78 }, { -6, 77 }, { -10, 86 },
{ -12, 92 }, { -15, 55 }, { -10, 60 }, { -6, 62 },
{ -4, 65 },
/* 252 -> 275 */
{ -12, 73 }, { -8, 76 }, { -7, 80 }, { -9, 88 },
{ -17, 110 },{ -11, 97 }, { -20, 84 }, { -11, 79 },
{ -6, 73 }, { -4, 74 }, { -13, 86 }, { -13, 96 },
{ -11, 97 }, { -19, 117 },{ -8, 78 }, { -5, 33 },
{ -4, 48 }, { -2, 53 }, { -3, 62 }, { -13, 71 },
{ -10, 79 }, { -12, 86 }, { -13, 90 }, { -14, 97 },
/* 276 a bit special (not used, x264_cabac_encode_bypass is used instead) */
{ 0, 0 },
/* 277 -> 307 */
{ -6, 93 }, { -6, 84 }, { -8, 79 }, { 0, 66 },
{ -1, 71 }, { 0, 62 }, { -2, 60 }, { -2, 59 },
{ -5, 75 }, { -3, 62 }, { -4, 58 }, { -9, 66 },
{ -1, 79 }, { 0, 71 }, { 3, 68 }, { 10, 44 },
{ -7, 62 }, { 15, 36 }, { 14, 40 }, { 16, 27 },
{ 12, 29 }, { 1, 44 }, { 20, 36 }, { 18, 32 },
{ 5, 42 }, { 1, 48 }, { 10, 62 }, { 17, 46 },
{ 9, 64 }, { -12, 104 },{ -11, 97 },
/* 308 -> 337 */
{ -16, 96 }, { -7, 88 }, { -8, 85 }, { -7, 85 },
{ -9, 85 }, { -13, 88 }, { 4, 66 }, { -3, 77 },
{ -3, 76 }, { -6, 76 }, { 10, 58 }, { -1, 76 },
{ -1, 83 }, { -7, 99 }, { -14, 95 }, { 2, 95 },
{ 0, 76 }, { -5, 74 }, { 0, 70 }, { -11, 75 },
{ 1, 68 }, { 0, 65 }, { -14, 73 }, { 3, 62 },
{ 4, 62 }, { -1, 68 }, { -13, 75 }, { 11, 55 },
{ 5, 64 }, { 12, 70 },
/* 338 -> 368 */
{ 15, 6 }, { 6, 19 }, { 7, 16 }, { 12, 14 },
{ 18, 13 }, { 13, 11 }, { 13, 15 }, { 15, 16 },
{ 12, 23 }, { 13, 23 }, { 15, 20 }, { 14, 26 },
{ 14, 44 }, { 17, 40 }, { 17, 47 }, { 24, 17 },
{ 21, 21 }, { 25, 22 }, { 31, 27 }, { 22, 29 },
{ 19, 35 }, { 14, 50 }, { 10, 57 }, { 7, 63 },
{ -2, 77 }, { -4, 82 }, { -3, 94 }, { 9, 69 },
{ -12, 109 },{ 36, -35 }, { 36, -34 },
/* 369 -> 398 */
{ 32, -26 }, { 37, -30 }, { 44, -32 }, { 34, -18 },
{ 34, -15 }, { 40, -15 }, { 33, -7 }, { 35, -5 },
{ 33, 0 }, { 38, 2 }, { 33, 13 }, { 23, 35 },
{ 13, 58 }, { 29, -3 }, { 26, 0 }, { 22, 30 },
{ 31, -7 }, { 35, -15 }, { 34, -3 }, { 34, 3 },
{ 36, -1 }, { 34, 5 }, { 32, 11 }, { 35, 5 },
{ 34, 12 }, { 39, 11 }, { 30, 29 }, { 34, 26 },
{ 29, 39 }, { 19, 66 }
};
static const int x264_cabac_context_init_PB[3][399][2] =
{
/* i_cabac_init_idc == 0 */
{
/* 0 - 10 */
{ 20, -15 }, { 2, 54 }, { 3, 74 }, { 20, -15 },
{ 2, 54 }, { 3, 74 }, { -28, 127 }, { -23, 104 },
{ -6, 53 }, { -1, 54 }, { 7, 51 },
/* 11 - 23 */
{ 23, 33 }, { 23, 2 }, { 21, 0 }, { 1, 9 },
{ 0, 49 }, { -37, 118 }, { 5, 57 }, { -13, 78 },
{ -11, 65 }, { 1, 62 }, { 12, 49 }, { -4, 73 },
{ 17, 50 },
/* 24 - 39 */
{ 18, 64 }, { 9, 43 }, { 29, 0 }, { 26, 67 },
{ 16, 90 }, { 9, 104 }, { -46, 127 }, { -20, 104 },
{ 1, 67 }, { -13, 78 }, { -11, 65 }, { 1, 62 },
{ -6, 86 }, { -17, 95 }, { -6, 61 }, { 9, 45 },
/* 40 - 53 */
{ -3, 69 }, { -6, 81 }, { -11, 96 }, { 6, 55 },
{ 7, 67 }, { -5, 86 }, { 2, 88 }, { 0, 58 },
{ -3, 76 }, { -10, 94 }, { 5, 54 }, { 4, 69 },
{ -3, 81 }, { 0, 88 },
/* 54 - 59 */
{ -7, 67 }, { -5, 74 }, { -4, 74 }, { -5, 80 },
{ -7, 72 }, { 1, 58 },
/* 60 - 69 */
{ 0, 41 }, { 0, 63 }, { 0, 63 }, { 0, 63 },
{ -9, 83 }, { 4, 86 }, { 0, 97 }, { -7, 72 },
{ 13, 41 }, { 3, 62 },
/* 70 - 87 */
{ 0, 45 }, { -4, 78 }, { -3, 96 }, { -27, 126 },
{ -28, 98 }, { -25, 101 }, { -23, 67 }, { -28, 82 },
{ -20, 94 }, { -16, 83 }, { -22, 110 }, { -21, 91 },
{ -18, 102 }, { -13, 93 }, { -29, 127 }, { -7, 92 },
{ -5, 89 }, { -7, 96 }, { -13, 108 }, { -3, 46 },
{ -1, 65 }, { -1, 57 }, { -9, 93 }, { -3, 74 },
{ -9, 92 }, { -8, 87 }, { -23, 126 }, { 5, 54 },
{ 6, 60 }, { 6, 59 }, { 6, 69 }, { -1, 48 },
{ 0, 68 }, { -4, 69 }, { -8, 88 },
/* 105 -> 165 */
{ -2, 85 }, { -6, 78 }, { -1, 75 }, { -7, 77 },
{ 2, 54 }, { 5, 50 }, { -3, 68 }, { 1, 50 },
{ 6, 42 }, { -4, 81 }, { 1, 63 }, { -4, 70 },
{ 0, 67 }, { 2, 57 }, { -2, 76 }, { 11, 35 },
{ 4, 64 }, { 1, 61 }, { 11, 35 }, { 18, 25 },
{ 12, 24 }, { 13, 29 }, { 13, 36 }, { -10, 93 },
{ -7, 73 }, { -2, 73 }, { 13, 46 }, { 9, 49 },
{ -7, 100 }, { 9, 53 }, { 2, 53 }, { 5, 53 },
{ -2, 61 }, { 0, 56 }, { 0, 56 }, { -13, 63 },
{ -5, 60 }, { -1, 62 }, { 4, 57 }, { -6, 69 },
{ 4, 57 }, { 14, 39 }, { 4, 51 }, { 13, 68 },
{ 3, 64 }, { 1, 61 }, { 9, 63 }, { 7, 50 },
{ 16, 39 }, { 5, 44 }, { 4, 52 }, { 11, 48 },
{ -5, 60 }, { -1, 59 }, { 0, 59 }, { 22, 33 },
{ 5, 44 }, { 14, 43 }, { -1, 78 }, { 0, 60 },
{ 9, 69 },
/* 166 - 226 */
{ 11, 28 }, { 2, 40 }, { 3, 44 }, { 0, 49 },
{ 0, 46 }, { 2, 44 }, { 2, 51 }, { 0, 47 },
{ 4, 39 }, { 2, 62 }, { 6, 46 }, { 0, 54 },
{ 3, 54 }, { 2, 58 }, { 4, 63 }, { 6, 51 },
{ 6, 57 }, { 7, 53 }, { 6, 52 }, { 6, 55 },
{ 11, 45 }, { 14, 36 }, { 8, 53 }, { -1, 82 },
{ 7, 55 }, { -3, 78 }, { 15, 46 }, { 22, 31 },
{ -1, 84 }, { 25, 7 }, { 30, -7 }, { 28, 3 },
{ 28, 4 }, { 32, 0 }, { 34, -1 }, { 30, 6 },
{ 30, 6 }, { 32, 9 }, { 31, 19 }, { 26, 27 },
{ 26, 30 }, { 37, 20 }, { 28, 34 }, { 17, 70 },
{ 1, 67 }, { 5, 59 }, { 9, 67 }, { 16, 30 },
{ 18, 32 }, { 18, 35 }, { 22, 29 }, { 24, 31 },
{ 23, 38 }, { 18, 43 }, { 20, 41 }, { 11, 63 },
{ 9, 59 }, { 9, 64 }, { -1, 94 }, { -2, 89 },
{ -9, 108 },
/* 227 - 275 */
{ -6, 76 }, { -2, 44 }, { 0, 45 }, { 0, 52 },
{ -3, 64 }, { -2, 59 }, { -4, 70 }, { -4, 75 },
{ -8, 82 }, { -17, 102 }, { -9, 77 }, { 3, 24 },
{ 0, 42 }, { 0, 48 }, { 0, 55 }, { -6, 59 },
{ -7, 71 }, { -12, 83 }, { -11, 87 }, { -30, 119 },
{ 1, 58 }, { -3, 29 }, { -1, 36 }, { 1, 38 },
{ 2, 43 }, { -6, 55 }, { 0, 58 }, { 0, 64 },
{ -3, 74 }, { -10, 90 }, { 0, 70 }, { -4, 29 },
{ 5, 31 }, { 7, 42 }, { 1, 59 }, { -2, 58 },
{ -3, 72 }, { -3, 81 }, { -11, 97 }, { 0, 58 },
{ 8, 5 }, { 10, 14 }, { 14, 18 }, { 13, 27 },
{ 2, 40 }, { 0, 58 }, { -3, 70 }, { -6, 79 },
{ -8, 85 },
/* 276 a bit special (not used, x264_cabac_encode_bypass is used instead) */
{ 0, 0 },
/* 277 - 337 */
{ -13, 106 }, { -16, 106 }, { -10, 87 }, { -21, 114 },
{ -18, 110 }, { -14, 98 }, { -22, 110 }, { -21, 106 },
{ -18, 103 }, { -21, 107 }, { -23, 108 }, { -26, 112 },
{ -10, 96 }, { -12, 95 }, { -5, 91 }, { -9, 93 },
{ -22, 94 }, { -5, 86 }, { 9, 67 }, { -4, 80 },
{ -10, 85 }, { -1, 70 }, { 7, 60 }, { 9, 58 },
{ 5, 61 }, { 12, 50 }, { 15, 50 }, { 18, 49 },
{ 17, 54 }, { 10, 41 }, { 7, 46 }, { -1, 51 },
{ 7, 49 }, { 8, 52 }, { 9, 41 }, { 6, 47 },
{ 2, 55 }, { 13, 41 }, { 10, 44 }, { 6, 50 },
{ 5, 53 }, { 13, 49 }, { 4, 63 }, { 6, 64 },
{ -2, 69 }, { -2, 59 }, { 6, 70 }, { 10, 44 },
{ 9, 31 }, { 12, 43 }, { 3, 53 }, { 14, 34 },
{ 10, 38 }, { -3, 52 }, { 13, 40 }, { 17, 32 },
{ 7, 44 }, { 7, 38 }, { 13, 50 }, { 10, 57 },
{ 26, 43 },
/* 338 - 398 */
{ 14, 11 }, { 11, 14 }, { 9, 11 }, { 18, 11 },
{ 21, 9 }, { 23, -2 }, { 32, -15 }, { 32, -15 },
{ 34, -21 }, { 39, -23 }, { 42, -33 }, { 41, -31 },
{ 46, -28 }, { 38, -12 }, { 21, 29 }, { 45, -24 },
{ 53, -45 }, { 48, -26 }, { 65, -43 }, { 43, -19 },
{ 39, -10 }, { 30, 9 }, { 18, 26 }, { 20, 27 },
{ 0, 57 }, { -14, 82 }, { -5, 75 }, { -19, 97 },
{ -35, 125 }, { 27, 0 }, { 28, 0 }, { 31, -4 },
{ 27, 6 }, { 34, 8 }, { 30, 10 }, { 24, 22 },
{ 33, 19 }, { 22, 32 }, { 26, 31 }, { 21, 41 },
{ 26, 44 }, { 23, 47 }, { 16, 65 }, { 14, 71 },
{ 8, 60 }, { 6, 63 }, { 17, 65 }, { 21, 24 },
{ 23, 20 }, { 26, 23 }, { 27, 32 }, { 28, 23 },
{ 28, 24 }, { 23, 40 }, { 24, 32 }, { 28, 29 },
{ 23, 42 }, { 19, 57 }, { 22, 53 }, { 22, 61 },
{ 11, 86 },
},
/* i_cabac_init_idc == 1 */
{
/* 0 - 10 */
{ 20, -15 }, { 2, 54 }, { 3, 74 }, { 20, -15 },
{ 2, 54 }, { 3, 74 }, { -28, 127 }, { -23, 104 },
{ -6, 53 }, { -1, 54 }, { 7, 51 },
/* 11 - 23 */
{ 22, 25 }, { 34, 0 }, { 16, 0 }, { -2, 9 },
{ 4, 41 }, { -29, 118 }, { 2, 65 }, { -6, 71 },
{ -13, 79 }, { 5, 52 }, { 9, 50 }, { -3, 70 },
{ 10, 54 },
/* 24 - 39 */
{ 26, 34 }, { 19, 22 }, { 40, 0 }, { 57, 2 },
{ 41, 36 }, { 26, 69 }, { -45, 127 }, { -15, 101 },
{ -4, 76 }, { -6, 71 }, { -13, 79 }, { 5, 52 },
{ 6, 69 }, { -13, 90 }, { 0, 52 }, { 8, 43 },
/* 40 - 53 */
{ -2, 69 },{ -5, 82 },{ -10, 96 },{ 2, 59 },
{ 2, 75 },{ -3, 87 },{ -3, 100 },{ 1, 56 },
{ -3, 74 },{ -6, 85 },{ 0, 59 },{ -3, 81 },
{ -7, 86 },{ -5, 95 },
/* 54 - 59 */
{ -1, 66 },{ -1, 77 },{ 1, 70 },{ -2, 86 },
{ -5, 72 },{ 0, 61 },
/* 60 - 69 */
{ 0, 41 }, { 0, 63 }, { 0, 63 }, { 0, 63 },
{ -9, 83 }, { 4, 86 }, { 0, 97 }, { -7, 72 },
{ 13, 41 }, { 3, 62 },
/* 70 - 104 */
{ 13, 15 }, { 7, 51 }, { 2, 80 }, { -39, 127 },
{ -18, 91 }, { -17, 96 }, { -26, 81 }, { -35, 98 },
{ -24, 102 }, { -23, 97 }, { -27, 119 }, { -24, 99 },
{ -21, 110 }, { -18, 102 }, { -36, 127 }, { 0, 80 },
{ -5, 89 }, { -7, 94 }, { -4, 92 }, { 0, 39 },
{ 0, 65 }, { -15, 84 }, { -35, 127 }, { -2, 73 },
{ -12, 104 }, { -9, 91 }, { -31, 127 }, { 3, 55 },
{ 7, 56 }, { 7, 55 }, { 8, 61 }, { -3, 53 },
{ 0, 68 }, { -7, 74 }, { -9, 88 },
/* 105 -> 165 */
{ -13, 103 }, { -13, 91 }, { -9, 89 }, { -14, 92 },
{ -8, 76 }, { -12, 87 }, { -23, 110 }, { -24, 105 },
{ -10, 78 }, { -20, 112 }, { -17, 99 }, { -78, 127 },
{ -70, 127 }, { -50, 127 }, { -46, 127 }, { -4, 66 },
{ -5, 78 }, { -4, 71 }, { -8, 72 }, { 2, 59 },
{ -1, 55 }, { -7, 70 }, { -6, 75 }, { -8, 89 },
{ -34, 119 }, { -3, 75 }, { 32, 20 }, { 30, 22 },
{ -44, 127 }, { 0, 54 }, { -5, 61 }, { 0, 58 },
{ -1, 60 }, { -3, 61 }, { -8, 67 }, { -25, 84 },
{ -14, 74 }, { -5, 65 }, { 5, 52 }, { 2, 57 },
{ 0, 61 }, { -9, 69 }, { -11, 70 }, { 18, 55 },
{ -4, 71 }, { 0, 58 }, { 7, 61 }, { 9, 41 },
{ 18, 25 }, { 9, 32 }, { 5, 43 }, { 9, 47 },
{ 0, 44 }, { 0, 51 }, { 2, 46 }, { 19, 38 },
{ -4, 66 }, { 15, 38 }, { 12, 42 }, { 9, 34 },
{ 0, 89 },
/* 166 - 226 */
{ 4, 45 }, { 10, 28 }, { 10, 31 }, { 33, -11 },
{ 52, -43 }, { 18, 15 }, { 28, 0 }, { 35, -22 },
{ 38, -25 }, { 34, 0 }, { 39, -18 }, { 32, -12 },
{ 102, -94 }, { 0, 0 }, { 56, -15 }, { 33, -4 },
{ 29, 10 }, { 37, -5 }, { 51, -29 }, { 39, -9 },
{ 52, -34 }, { 69, -58 }, { 67, -63 }, { 44, -5 },
{ 32, 7 }, { 55, -29 }, { 32, 1 }, { 0, 0 },
{ 27, 36 }, { 33, -25 }, { 34, -30 }, { 36, -28 },
{ 38, -28 }, { 38, -27 }, { 34, -18 }, { 35, -16 },
{ 34, -14 }, { 32, -8 }, { 37, -6 }, { 35, 0 },
{ 30, 10 }, { 28, 18 }, { 26, 25 }, { 29, 41 },
{ 0, 75 }, { 2, 72 }, { 8, 77 }, { 14, 35 },
{ 18, 31 }, { 17, 35 }, { 21, 30 }, { 17, 45 },
{ 20, 42 }, { 18, 45 }, { 27, 26 }, { 16, 54 },
{ 7, 66 }, { 16, 56 }, { 11, 73 }, { 10, 67 },
{ -10, 116 },
/* 227 - 275 */
{ -23, 112 }, { -15, 71 }, { -7, 61 }, { 0, 53 },
{ -5, 66 }, { -11, 77 }, { -9, 80 }, { -9, 84 },
{ -10, 87 }, { -34, 127 }, { -21, 101 }, { -3, 39 },
{ -5, 53 }, { -7, 61 }, { -11, 75 }, { -15, 77 },
{ -17, 91 }, { -25, 107 }, { -25, 111 }, { -28, 122 },
{ -11, 76 }, { -10, 44 }, { -10, 52 }, { -10, 57 },
{ -9, 58 }, { -16, 72 }, { -7, 69 }, { -4, 69 },
{ -5, 74 }, { -9, 86 }, { 2, 66 }, { -9, 34 },
{ 1, 32 }, { 11, 31 }, { 5, 52 }, { -2, 55 },
{ -2, 67 }, { 0, 73 }, { -8, 89 }, { 3, 52 },
{ 7, 4 }, { 10, 8 }, { 17, 8 }, { 16, 19 },
{ 3, 37 }, { -1, 61 }, { -5, 73 }, { -1, 70 },
{ -4, 78 },
/* 276 a bit special (not used, x264_cabac_encode_bypass is used instead) */
{ 0, 0 },
/* 277 - 337 */
{ -21, 126 }, { -23, 124 }, { -20, 110 }, { -26, 126 },
{ -25, 124 }, { -17, 105 }, { -27, 121 }, { -27, 117 },
{ -17, 102 }, { -26, 117 }, { -27, 116 }, { -33, 122 },
{ -10, 95 }, { -14, 100 }, { -8, 95 }, { -17, 111 },
{ -28, 114 }, { -6, 89 }, { -2, 80 }, { -4, 82 },
{ -9, 85 }, { -8, 81 }, { -1, 72 }, { 5, 64 },
{ 1, 67 }, { 9, 56 }, { 0, 69 }, { 1, 69 },
{ 7, 69 }, { -7, 69 }, { -6, 67 }, { -16, 77 },
{ -2, 64 }, { 2, 61 }, { -6, 67 }, { -3, 64 },
{ 2, 57 }, { -3, 65 }, { -3, 66 }, { 0, 62 },
{ 9, 51 }, { -1, 66 }, { -2, 71 }, { -2, 75 },
{ -1, 70 }, { -9, 72 }, { 14, 60 }, { 16, 37 },
{ 0, 47 }, { 18, 35 }, { 11, 37 }, { 12, 41 },
{ 10, 41 }, { 2, 48 }, { 12, 41 }, { 13, 41 },
{ 0, 59 }, { 3, 50 }, { 19, 40 }, { 3, 66 },
{ 18, 50 },
/* 338 - 398 */
{ 19, -6 }, { 18, -6 }, { 14, 0 }, { 26, -12 },
{ 31, -16 }, { 33, -25 }, { 33, -22 }, { 37, -28 },
{ 39, -30 }, { 42, -30 }, { 47, -42 }, { 45, -36 },
{ 49, -34 }, { 41, -17 }, { 32, 9 }, { 69, -71 },
{ 63, -63 }, { 66, -64 }, { 77, -74 }, { 54, -39 },
{ 52, -35 }, { 41, -10 }, { 36, 0 }, { 40, -1 },
{ 30, 14 }, { 28, 26 }, { 23, 37 }, { 12, 55 },
{ 11, 65 }, { 37, -33 }, { 39, -36 }, { 40, -37 },
{ 38, -30 }, { 46, -33 }, { 42, -30 }, { 40, -24 },
{ 49, -29 }, { 38, -12 }, { 40, -10 }, { 38, -3 },
{ 46, -5 }, { 31, 20 }, { 29, 30 }, { 25, 44 },
{ 12, 48 }, { 11, 49 }, { 26, 45 }, { 22, 22 },
{ 23, 22 }, { 27, 21 }, { 33, 20 }, { 26, 28 },
{ 30, 24 }, { 27, 34 }, { 18, 42 }, { 25, 39 },
{ 18, 50 }, { 12, 70 }, { 21, 54 }, { 14, 71 },
{ 11, 83 },
},
/* i_cabac_init_idc == 2 */
{
/* 0 - 10 */
{ 20, -15 }, { 2, 54 }, { 3, 74 }, { 20, -15 },
{ 2, 54 }, { 3, 74 }, { -28, 127 }, { -23, 104 },
{ -6, 53 }, { -1, 54 }, { 7, 51 },
/* 11 - 23 */
{ 29, 16 }, { 25, 0 }, { 14, 0 }, { -10, 51 },
{ -3, 62 }, { -27, 99 }, { 26, 16 }, { -4, 85 },
{ -24, 102 }, { 5, 57 }, { 6, 57 }, { -17, 73 },
{ 14, 57 },
/* 24 - 39 */
{ 20, 40 }, { 20, 10 }, { 29, 0 }, { 54, 0 },
{ 37, 42 }, { 12, 97 }, { -32, 127 }, { -22, 117 },
{ -2, 74 }, { -4, 85 }, { -24, 102 }, { 5, 57 },
{ -6, 93 }, { -14, 88 }, { -6, 44 }, { 4, 55 },
/* 40 - 53 */
{ -11, 89 },{ -15, 103 },{ -21, 116 },{ 19, 57 },
{ 20, 58 },{ 4, 84 },{ 6, 96 },{ 1, 63 },
{ -5, 85 },{ -13, 106 },{ 5, 63 },{ 6, 75 },
{ -3, 90 },{ -1, 101 },
/* 54 - 59 */
{ 3, 55 },{ -4, 79 },{ -2, 75 },{ -12, 97 },
{ -7, 50 },{ 1, 60 },
/* 60 - 69 */
{ 0, 41 }, { 0, 63 }, { 0, 63 }, { 0, 63 },
{ -9, 83 }, { 4, 86 }, { 0, 97 }, { -7, 72 },
{ 13, 41 }, { 3, 62 },
/* 70 - 104 */
{ 7, 34 }, { -9, 88 }, { -20, 127 }, { -36, 127 },
{ -17, 91 }, { -14, 95 }, { -25, 84 }, { -25, 86 },
{ -12, 89 }, { -17, 91 }, { -31, 127 }, { -14, 76 },
{ -18, 103 }, { -13, 90 }, { -37, 127 }, { 11, 80 },
{ 5, 76 }, { 2, 84 }, { 5, 78 }, { -6, 55 },
{ 4, 61 }, { -14, 83 }, { -37, 127 }, { -5, 79 },
{ -11, 104 }, { -11, 91 }, { -30, 127 }, { 0, 65 },
{ -2, 79 }, { 0, 72 }, { -4, 92 }, { -6, 56 },
{ 3, 68 }, { -8, 71 }, { -13, 98 },
/* 105 -> 165 */
{ -4, 86 }, { -12, 88 }, { -5, 82 }, { -3, 72 },
{ -4, 67 }, { -8, 72 }, { -16, 89 }, { -9, 69 },
{ -1, 59 }, { 5, 66 }, { 4, 57 }, { -4, 71 },
{ -2, 71 }, { 2, 58 }, { -1, 74 }, { -4, 44 },
{ -1, 69 }, { 0, 62 }, { -7, 51 }, { -4, 47 },
{ -6, 42 }, { -3, 41 }, { -6, 53 }, { 8, 76 },
{ -9, 78 }, { -11, 83 }, { 9, 52 }, { 0, 67 },
{ -5, 90 }, { 1, 67 }, { -15, 72 }, { -5, 75 },
{ -8, 80 }, { -21, 83 }, { -21, 64 }, { -13, 31 },
{ -25, 64 }, { -29, 94 }, { 9, 75 }, { 17, 63 },
{ -8, 74 }, { -5, 35 }, { -2, 27 }, { 13, 91 },
{ 3, 65 }, { -7, 69 }, { 8, 77 }, { -10, 66 },
{ 3, 62 }, { -3, 68 }, { -20, 81 }, { 0, 30 },
{ 1, 7 }, { -3, 23 }, { -21, 74 }, { 16, 66 },
{ -23, 124 }, { 17, 37 }, { 44, -18 }, { 50, -34 },
{ -22, 127 },
/* 166 - 226 */
{ 4, 39 }, { 0, 42 }, { 7, 34 }, { 11, 29 },
{ 8, 31 }, { 6, 37 }, { 7, 42 }, { 3, 40 },
{ 8, 33 }, { 13, 43 }, { 13, 36 }, { 4, 47 },
{ 3, 55 }, { 2, 58 }, { 6, 60 }, { 8, 44 },
{ 11, 44 }, { 14, 42 }, { 7, 48 }, { 4, 56 },
{ 4, 52 }, { 13, 37 }, { 9, 49 }, { 19, 58 },
{ 10, 48 }, { 12, 45 }, { 0, 69 }, { 20, 33 },
{ 8, 63 }, { 35, -18 }, { 33, -25 }, { 28, -3 },
{ 24, 10 }, { 27, 0 }, { 34, -14 }, { 52, -44 },
{ 39, -24 }, { 19, 17 }, { 31, 25 }, { 36, 29 },
{ 24, 33 }, { 34, 15 }, { 30, 20 }, { 22, 73 },
{ 20, 34 }, { 19, 31 }, { 27, 44 }, { 19, 16 },
{ 15, 36 }, { 15, 36 }, { 21, 28 }, { 25, 21 },
{ 30, 20 }, { 31, 12 }, { 27, 16 }, { 24, 42 },
{ 0, 93 }, { 14, 56 }, { 15, 57 }, { 26, 38 },
{ -24, 127 },
/* 227 - 275 */
{ -24, 115 }, { -22, 82 }, { -9, 62 }, { 0, 53 },
{ 0, 59 }, { -14, 85 }, { -13, 89 }, { -13, 94 },
{ -11, 92 }, { -29, 127 }, { -21, 100 }, { -14, 57 },
{ -12, 67 }, { -11, 71 }, { -10, 77 }, { -21, 85 },
{ -16, 88 }, { -23, 104 }, { -15, 98 }, { -37, 127 },
{ -10, 82 }, { -8, 48 }, { -8, 61 }, { -8, 66 },
{ -7, 70 }, { -14, 75 }, { -10, 79 }, { -9, 83 },
{ -12, 92 }, { -18, 108 }, { -4, 79 }, { -22, 69 },
{ -16, 75 }, { -2, 58 }, { 1, 58 }, { -13, 78 },
{ -9, 83 }, { -4, 81 }, { -13, 99 }, { -13, 81 },
{ -6, 38 }, { -13, 62 }, { -6, 58 }, { -2, 59 },
{ -16, 73 }, { -10, 76 }, { -13, 86 }, { -9, 83 },
{ -10, 87 },
/* 276 a bit special (not used, x264_cabac_encode_bypass is used instead) */
{ 0, 0 },
/* 277 - 337 */
{ -22, 127 }, { -25, 127 }, { -25, 120 }, { -27, 127 },
{ -19, 114 }, { -23, 117 }, { -25, 118 }, { -26, 117 },
{ -24, 113 }, { -28, 118 }, { -31, 120 }, { -37, 124 },
{ -10, 94 }, { -15, 102 }, { -10, 99 }, { -13, 106 },
{ -50, 127 }, { -5, 92 }, { 17, 57 }, { -5, 86 },
{ -13, 94 }, { -12, 91 }, { -2, 77 }, { 0, 71 },
{ -1, 73 }, { 4, 64 }, { -7, 81 }, { 5, 64 },
{ 15, 57 }, { 1, 67 }, { 0, 68 }, { -10, 67 },
{ 1, 68 }, { 0, 77 }, { 2, 64 }, { 0, 68 },
{ -5, 78 }, { 7, 55 }, { 5, 59 }, { 2, 65 },
{ 14, 54 }, { 15, 44 }, { 5, 60 }, { 2, 70 },
{ -2, 76 }, { -18, 86 }, { 12, 70 }, { 5, 64 },
{ -12, 70 }, { 11, 55 }, { 5, 56 }, { 0, 69 },
{ 2, 65 }, { -6, 74 }, { 5, 54 }, { 7, 54 },
{ -6, 76 }, { -11, 82 }, { -2, 77 }, { -2, 77 },
{ 25, 42 },
/* 338 - 398 */
{ 17, -13 }, { 16, -9 }, { 17, -12 }, { 27, -21 },
{ 37, -30 }, { 41, -40 }, { 42, -41 }, { 48, -47 },
{ 39, -32 }, { 46, -40 }, { 52, -51 }, { 46, -41 },
{ 52, -39 }, { 43, -19 }, { 32, 11 }, { 61, -55 },
{ 56, -46 }, { 62, -50 }, { 81, -67 }, { 45, -20 },
{ 35, -2 }, { 28, 15 }, { 34, 1 }, { 39, 1 },
{ 30, 17 }, { 20, 38 }, { 18, 45 }, { 15, 54 },
{ 0, 79 }, { 36, -16 }, { 37, -14 }, { 37, -17 },
{ 32, 1 }, { 34, 15 }, { 29, 15 }, { 24, 25 },
{ 34, 22 }, { 31, 16 }, { 35, 18 }, { 31, 28 },
{ 33, 41 }, { 36, 28 }, { 27, 47 }, { 21, 62 },
{ 18, 31 }, { 19, 26 }, { 36, 24 }, { 24, 23 },
{ 27, 16 }, { 24, 30 }, { 31, 29 }, { 22, 41 },
{ 22, 42 }, { 16, 60 }, { 15, 52 }, { 14, 60 },
{ 3, 78 }, { -16, 123 }, { 21, 53 }, { 22, 56 },
{ 25, 61 },
}
};
static const int x264_cabac_range_lps[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 },
};
static const int x264_transition_lps[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
};
static const int x264_transition_mps[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,
};
#define FIX8(f) ((int)(f*(1<<8)))
static int x264_cabac_probability[128] =
{
FIX8(0.9812), FIX8(0.9802), FIX8(0.9792), FIX8(0.9781),
FIX8(0.9769), FIX8(0.9757), FIX8(0.9744), FIX8(0.9730),
FIX8(0.9716), FIX8(0.9700), FIX8(0.9684), FIX8(0.9667),
FIX8(0.9650), FIX8(0.9631), FIX8(0.9611), FIX8(0.9590),
FIX8(0.9568), FIX8(0.9545), FIX8(0.9521), FIX8(0.9495),
FIX8(0.9468), FIX8(0.9440), FIX8(0.9410), FIX8(0.9378),
FIX8(0.9345), FIX8(0.9310), FIX8(0.9273), FIX8(0.9234),
FIX8(0.9193), FIX8(0.9150), FIX8(0.9105), FIX8(0.9057),
FIX8(0.9006), FIX8(0.8953), FIX8(0.8897), FIX8(0.8838),
FIX8(0.8776), FIX8(0.8710), FIX8(0.8641), FIX8(0.8569),
FIX8(0.8492), FIX8(0.8411), FIX8(0.8326), FIX8(0.8237),
FIX8(0.8143), FIX8(0.8043), FIX8(0.7938), FIX8(0.7828),
FIX8(0.7712), FIX8(0.7590), FIX8(0.7461), FIX8(0.7325),
FIX8(0.7182), FIX8(0.7031), FIX8(0.6872), FIX8(0.6705),
FIX8(0.6528), FIX8(0.6343), FIX8(0.6147), FIX8(0.5941),
FIX8(0.5724), FIX8(0.5495), FIX8(0.5254), FIX8(0.5000),
FIX8(0.5000), FIX8(0.4746), FIX8(0.4505), FIX8(0.4276),
FIX8(0.4059), FIX8(0.3853), FIX8(0.3657), FIX8(0.3472),
FIX8(0.3295), FIX8(0.3128), FIX8(0.2969), FIX8(0.2818),
FIX8(0.2675), FIX8(0.2539), FIX8(0.2410), FIX8(0.2288),
FIX8(0.2172), FIX8(0.2062), FIX8(0.1957), FIX8(0.1857),
FIX8(0.1763), FIX8(0.1674), FIX8(0.1589), FIX8(0.1508),
FIX8(0.1431), FIX8(0.1359), FIX8(0.1290), FIX8(0.1224),
FIX8(0.1162), FIX8(0.1103), FIX8(0.1047), FIX8(0.0994),
FIX8(0.0943), FIX8(0.0895), FIX8(0.0850), FIX8(0.0807),
FIX8(0.0766), FIX8(0.0727), FIX8(0.0690), FIX8(0.0655),
FIX8(0.0622), FIX8(0.0590), FIX8(0.0560), FIX8(0.0532),
FIX8(0.0505), FIX8(0.0479), FIX8(0.0455), FIX8(0.0432),
FIX8(0.0410), FIX8(0.0389), FIX8(0.0369), FIX8(0.0350),
FIX8(0.0333), FIX8(0.0316), FIX8(0.0300), FIX8(0.0284),
FIX8(0.0270), FIX8(0.0256), FIX8(0.0243), FIX8(0.0231),
FIX8(0.0219), FIX8(0.0208), FIX8(0.0198), FIX8(0.0187)
};
/* -ln2(probability) */
static int x264_cabac_entropy[128] =
{
FIX8(0.0273), FIX8(0.0288), FIX8(0.0303), FIX8(0.0320),
FIX8(0.0337), FIX8(0.0355), FIX8(0.0375), FIX8(0.0395),
FIX8(0.0416), FIX8(0.0439), FIX8(0.0463), FIX8(0.0488),
FIX8(0.0515), FIX8(0.0543), FIX8(0.0572), FIX8(0.0604),
FIX8(0.0637), FIX8(0.0671), FIX8(0.0708), FIX8(0.0747),
FIX8(0.0788), FIX8(0.0832), FIX8(0.0878), FIX8(0.0926),
FIX8(0.0977), FIX8(0.1032), FIX8(0.1089), FIX8(0.1149),
FIX8(0.1214), FIX8(0.1282), FIX8(0.1353), FIX8(0.1429),
FIX8(0.1510), FIX8(0.1596), FIX8(0.1686), FIX8(0.1782),
FIX8(0.1884), FIX8(0.1992), FIX8(0.2107), FIX8(0.2229),
FIX8(0.2358), FIX8(0.2496), FIX8(0.2642), FIX8(0.2798),
FIX8(0.2964), FIX8(0.3142), FIX8(0.3331), FIX8(0.3532),
FIX8(0.3748), FIX8(0.3979), FIX8(0.4226), FIX8(0.4491),
FIX8(0.4776), FIX8(0.5082), FIX8(0.5412), FIX8(0.5768),
FIX8(0.6152), FIX8(0.6568), FIX8(0.7020), FIX8(0.7513),
FIX8(0.8050), FIX8(0.8638), FIX8(0.9285), FIX8(1.0000),
FIX8(1.0000), FIX8(1.0752), FIX8(1.1504), FIX8(1.2256),
FIX8(1.3008), FIX8(1.3759), FIX8(1.4511), FIX8(1.5263),
FIX8(1.6015), FIX8(1.6767), FIX8(1.7519), FIX8(1.8271),
FIX8(1.9023), FIX8(1.9775), FIX8(2.0527), FIX8(2.1278),
FIX8(2.2030), FIX8(2.2782), FIX8(2.3534), FIX8(2.4286),
FIX8(2.5038), FIX8(2.5790), FIX8(2.6542), FIX8(2.7294),
FIX8(2.8046), FIX8(2.8797), FIX8(2.9549), FIX8(3.0301),
FIX8(3.1053), FIX8(3.1805), FIX8(3.2557), FIX8(3.3309),
FIX8(3.4061), FIX8(3.4813), FIX8(3.5565), FIX8(3.6316),
FIX8(3.7068), FIX8(3.7820), FIX8(3.8572), FIX8(3.9324),
FIX8(4.0076), FIX8(4.0828), FIX8(4.1580), FIX8(4.2332),
FIX8(4.3083), FIX8(4.3836), FIX8(4.4588), FIX8(4.5339),
FIX8(4.6091), FIX8(4.6843), FIX8(4.7595), FIX8(4.8347),
FIX8(4.9099), FIX8(4.9851), FIX8(5.0602), FIX8(5.1354),
FIX8(5.2106), FIX8(5.2859), FIX8(5.3610), FIX8(5.4362),
FIX8(5.5114), FIX8(5.5866), FIX8(5.6618), FIX8(5.7370)
};
#undef FIX8
/*****************************************************************************
*
*****************************************************************************/
void x264_cabac_context_init( x264_cabac_t *cb, int i_slice_type, int i_qp, int i_model )
{
const int (*cabac_context_init)[399][2];
int i;
if( i_slice_type == SLICE_TYPE_I )
{
cabac_context_init = &x264_cabac_context_init_I;
}
else
{
cabac_context_init = &x264_cabac_context_init_PB[i_model];
}
for( i = 0; i < 399; i++ )
{
int i_pre_state;
i_pre_state = x264_clip3( (((*cabac_context_init)[i][0] * i_qp) >> 4) + (*cabac_context_init)[i][1], 1, 126 );
if( i_pre_state <= 63 )
{
cb->ctxstate[i].i_state = 63 - i_pre_state;
cb->ctxstate[i].i_mps = 0;
}
else
{
cb->ctxstate[i].i_state = i_pre_state - 64;
cb->ctxstate[i].i_mps = 1;
}
cb->ctxstate[i].i_count = 0;
}
}
/*****************************************************************************
*
*****************************************************************************/
void x264_cabac_decode_init( x264_cabac_t *cb, bs_t *s )
{
cb->i_range = 0x01fe;
cb->i_low = bs_read( s, 9 );
cb->s = s;
}
static inline void x264_cabac_decode_renorm( x264_cabac_t *cb )
{
while( cb->i_range < 0x0100 )
{
cb->i_range <<= 1;
cb->i_low = ( cb->i_low << 1 )|bs_read( cb->s, 1 );
}
}
int x264_cabac_decode_decision( x264_cabac_t *cb, int i_ctx )
{
int i_state = cb->ctxstate[i_ctx].i_state;
int i_mps = cb->ctxstate[i_ctx].i_mps;
int i_range_lps = x264_cabac_range_lps[i_state][(cb->i_range>>6)&0x03];
int val;
cb->i_range -= i_range_lps;
if( cb->i_low >= cb->i_range )
{
val = 1 - i_mps;
cb->i_low -= cb->i_range;
cb->i_range= i_range_lps;
if( i_state == 0 )
{
cb->ctxstate[i_ctx].i_mps = 1 - i_mps;
}
cb->ctxstate[i_ctx].i_state = x264_transition_lps[i_state];
}
else
{
val = i_mps;
cb->ctxstate[i_ctx].i_state = x264_transition_mps[i_state];
}
x264_cabac_decode_renorm( cb );
return val;
}
int x264_cabac_decode_bypass( x264_cabac_t *cb )
{
cb->i_low = (cb->i_low << 1)|bs_read( cb->s, 1 );
if( cb->i_low >= cb->i_range )
{
cb->i_low -= cb->i_range;
return 1;
}
return 0;
}
int x264_cabac_decode_terminal( x264_cabac_t *cb )
{
if( cb->i_low >= cb->i_range - 2 )
{
return 1;
}
cb->i_range -= 2;
x264_cabac_decode_renorm( cb );
return 0;
}
/*****************************************************************************
*
*****************************************************************************/
void x264_cabac_model_init( x264_cabac_t *cb )
{
int i;
for( i = 0; i < 3; i++ )
{
cb->slice[i].i_model = 0;
cb->slice[i].i_cost = -1;
}
}
int x264_cabac_model_get ( x264_cabac_t *cb, int i_slice_type )
{
return cb->slice[i_slice_type].i_model;
}
void x264_cabac_model_update( x264_cabac_t *cb, int i_slice_type, int i_qp )
{
int i;
if( i_slice_type == SLICE_TYPE_I )
{
return;
}
cb->slice[i_slice_type].i_cost = -1;
for( i = 0; i < 3; i++ )
{
int i_ctx;
int i_cost;
i_cost = 0; /* fix8 */
for( i_ctx = 0; i_ctx < 399; i_ctx++ )
{
int i_weight;
int i_model_state;
int i_ctx_state;
i_weight = X264_MIN( (1<<8), (cb->ctxstate[i_ctx].i_count<<8) / 32 );
i_model_state = x264_clip3( ((x264_cabac_context_init_PB[i][i_ctx][0] * i_qp)>>4) +
x264_cabac_context_init_PB[i][i_ctx][1], 0, 127 );
i_ctx_state = cb->ctxstate[i_ctx].i_mps ? 64 + cb->ctxstate[i_ctx].i_state : 63 - cb->ctxstate[i_ctx].i_state;
i_cost += (i_weight * (( x264_cabac_probability[ i_ctx_state] * x264_cabac_entropy[ i_model_state] +
x264_cabac_probability[127 - i_ctx_state] * x264_cabac_entropy[127 - i_model_state] ) >> 8))>>8;
}
if( cb->slice[i_slice_type].i_cost == -1 || cb->slice[i_slice_type].i_cost > i_cost )
{
cb->slice[i_slice_type].i_model= i;
cb->slice[i_slice_type].i_cost = i_cost;
}
}
}
void x264_cabac_encode_init( x264_cabac_t *cb, bs_t *s )
{
cb->i_low = 0;
cb->i_range = 0x01FE;
cb->b_first_bit= 1;
cb->i_bits_outstanding = 0;
cb->i_sym_cnt = 0;
cb->s = s;
}
static inline void x264_cabac_putbit( x264_cabac_t *cb, int b )
{
if( cb->b_first_bit )
{
cb->b_first_bit = 0;
}
else
{
bs_write1( cb->s, b );
}
while( cb->i_bits_outstanding > 0 )
{
bs_write1( cb->s, 1 - b );
cb->i_bits_outstanding--;
}
}
static inline void x264_cabac_encode_renorm( x264_cabac_t *cb )
{
/* RenormE */
while( cb->i_range < 0x0100 )
{
if( cb->i_low < 0x100 )
{
x264_cabac_putbit( cb, 0 );
}
else
{
if( cb->i_low >= 0x200 )
{
cb->i_low -= 0x200;
x264_cabac_putbit( cb, 1 );
}
else
{
cb->i_low -= 0x100;
cb->i_bits_outstanding++;
}
}
cb->i_range <<= 1;
cb->i_low <<= 1;
}
}
void x264_cabac_encode_decision( x264_cabac_t *cb, int i_ctx, int b )
{
int i_state = cb->ctxstate[i_ctx].i_state;
int i_mps = cb->ctxstate[i_ctx].i_mps;
int i_range_lps = x264_cabac_range_lps[i_state][(cb->i_range>>6)&0x03];
#ifdef TRACE
if( binCount >= 0 )
{
fprintf( stderr, "%d ctx=%d b=%d\n", binCount, i_ctx, b );
}
fprintf( stderr, "%d 0x%04x %d %d\n", binCount++, cb->i_range, i_state, i_mps );
#endif
cb->i_range -= i_range_lps;
if( b != i_mps )
{
cb->i_low += cb->i_range;
cb->i_range = i_range_lps;
if( i_state == 0 )
{
cb->ctxstate[i_ctx].i_mps = 1 - i_mps;
}
cb->ctxstate[i_ctx].i_state = x264_transition_lps[i_state];
}
else
{
cb->ctxstate[i_ctx].i_state = x264_transition_mps[i_state];
}
cb->ctxstate[i_ctx].i_count++;
x264_cabac_encode_renorm( cb );
cb->i_sym_cnt++;
}
void x264_cabac_encode_bypass( x264_cabac_t *cb, int b )
{
#ifdef TRACE
fprintf( stderr, "%d 0x%04x\n", binCount++, cb->i_range );
#endif
cb->i_low <<= 1;
if( b )
{
cb->i_low += cb->i_range;
}
if( cb->i_low >= 0x400 )
{
x264_cabac_putbit( cb, 1 );
cb->i_low -= 0x400;
}
else
{
if( cb->i_low < 0x200 )
{
x264_cabac_putbit( cb, 0 );
}
else
{
cb->i_low -= 0x200;
cb->i_bits_outstanding++;
}
}
cb->i_sym_cnt++;
}
void x264_cabac_encode_terminal( x264_cabac_t *cb, int b )
{
#ifdef TRACE
fprintf( stderr, "%d 0x%04x\n", binCount++, cb->i_range );
#endif
cb->i_range -= 2;
if( b )
{
cb->i_low += cb->i_range;
cb->i_range = 2;
}
x264_cabac_encode_renorm( cb );
cb->i_sym_cnt++;
}
void x264_cabac_encode_flush( x264_cabac_t *cb )
{
x264_cabac_putbit( cb, (cb->i_low >> 9)&0x01 );
bs_write1( cb->s, (cb->i_low >> 8)&0x01 );
/* check that */
bs_write1( cb->s, 0x01 );
bs_align_0( cb->s );
}