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FFmpeg/libavcodec/h264_cabac.c
Michael Niedermayer 2773920698 Optimize decode_cabac_field_decoding_flag(). 
~4 cpu cycles faster

Originally committed as revision 21447 to svn://svn.ffmpeg.org/ffmpeg/trunk
2010-01-25 02:44:34 +00:00

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/*
* H.26L/H.264/AVC/JVT/14496-10/... cabac decoding
* Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
/**
* @file libavcodec/h264_cabac.c
* H.264 / AVC / MPEG4 part10 cabac decoding.
* @author Michael Niedermayer <michaelni@gmx.at>
*/
#define CABAC 1
#include "internal.h"
#include "dsputil.h"
#include "avcodec.h"
#include "h264.h"
#include "h264data.h"
#include "h264_mvpred.h"
#include "golomb.h"
#include "cabac.h"
#if ARCH_X86
#include "x86/h264_i386.h"
#endif
//#undef NDEBUG
#include <assert.h>
/* Cabac pre state table */
static const int8_t cabac_context_init_I[460][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, 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 },
/* 399 -> 435 */
{ 31, 21 }, { 31, 31 }, { 25, 50 },
{ -17, 120 }, { -20, 112 }, { -18, 114 }, { -11, 85 },
{ -15, 92 }, { -14, 89 }, { -26, 71 }, { -15, 81 },
{ -14, 80 }, { 0, 68 }, { -14, 70 }, { -24, 56 },
{ -23, 68 }, { -24, 50 }, { -11, 74 }, { 23, -13 },
{ 26, -13 }, { 40, -15 }, { 49, -14 }, { 44, 3 },
{ 45, 6 }, { 44, 34 }, { 33, 54 }, { 19, 82 },
{ -3, 75 }, { -1, 23 }, { 1, 34 }, { 1, 43 },
{ 0, 54 }, { -2, 55 }, { 0, 61 }, { 1, 64 },
{ 0, 68 }, { -9, 92 },
/* 436 -> 459 */
{ -14, 106 }, { -13, 97 }, { -15, 90 }, { -12, 90 },
{ -18, 88 }, { -10, 73 }, { -9, 79 }, { -14, 86 },
{ -10, 73 }, { -10, 70 }, { -10, 69 }, { -5, 66 },
{ -9, 64 }, { -5, 58 }, { 2, 59 }, { 21, -10 },
{ 24, -11 }, { 28, -8 }, { 28, -1 }, { 29, 3 },
{ 29, 9 }, { 35, 20 }, { 29, 36 }, { 14, 67 }
};
static const int8_t cabac_context_init_PB[3][460][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, 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 },
/* 399 - 435 */
{ 12, 40 }, { 11, 51 }, { 14, 59 },
{ -4, 79 }, { -7, 71 }, { -5, 69 }, { -9, 70 },
{ -8, 66 }, { -10, 68 }, { -19, 73 }, { -12, 69 },
{ -16, 70 }, { -15, 67 }, { -20, 62 }, { -19, 70 },
{ -16, 66 }, { -22, 65 }, { -20, 63 }, { 9, -2 },
{ 26, -9 }, { 33, -9 }, { 39, -7 }, { 41, -2 },
{ 45, 3 }, { 49, 9 }, { 45, 27 }, { 36, 59 },
{ -6, 66 }, { -7, 35 }, { -7, 42 }, { -8, 45 },
{ -5, 48 }, { -12, 56 }, { -6, 60 }, { -5, 62 },
{ -8, 66 }, { -8, 76 },
/* 436 - 459 */
{ -5, 85 }, { -6, 81 }, { -10, 77 }, { -7, 81 },
{ -17, 80 }, { -18, 73 }, { -4, 74 }, { -10, 83 },
{ -9, 71 }, { -9, 67 }, { -1, 61 }, { -8, 66 },
{ -14, 66 }, { 0, 59 }, { 2, 59 }, { 21, -13 },
{ 33, -14 }, { 39, -7 }, { 46, -2 }, { 51, 2 },
{ 60, 6 }, { 61, 17 }, { 55, 34 }, { 42, 62 },
},
/* 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, 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 },
/* 399 - 435 */
{ 25, 32 }, { 21, 49 }, { 21, 54 },
{ -5, 85 }, { -6, 81 }, { -10, 77 }, { -7, 81 },
{ -17, 80 }, { -18, 73 }, { -4, 74 }, { -10, 83 },
{ -9, 71 }, { -9, 67 }, { -1, 61 }, { -8, 66 },
{ -14, 66 }, { 0, 59 }, { 2, 59 }, { 17, -10 },
{ 32, -13 }, { 42, -9 }, { 49, -5 }, { 53, 0 },
{ 64, 3 }, { 68, 10 }, { 66, 27 }, { 47, 57 },
{ -5, 71 }, { 0, 24 }, { -1, 36 }, { -2, 42 },
{ -2, 52 }, { -9, 57 }, { -6, 63 }, { -4, 65 },
{ -4, 67 }, { -7, 82 },
/* 436 - 459 */
{ -3, 81 }, { -3, 76 }, { -7, 72 }, { -6, 78 },
{ -12, 72 }, { -14, 68 }, { -3, 70 }, { -6, 76 },
{ -5, 66 }, { -5, 62 }, { 0, 57 }, { -4, 61 },
{ -9, 60 }, { 1, 54 }, { 2, 58 }, { 17, -10 },
{ 32, -13 }, { 42, -9 }, { 49, -5 }, { 53, 0 },
{ 64, 3 }, { 68, 10 }, { 66, 27 }, { 47, 57 },
},
/* 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, 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 },
/* 399 - 435 */
{ 21, 33 }, { 19, 50 }, { 17, 61 },
{ -3, 78 }, { -8, 74 }, { -9, 72 }, { -10, 72 },
{ -18, 75 }, { -12, 71 }, { -11, 63 }, { -5, 70 },
{ -17, 75 }, { -14, 72 }, { -16, 67 }, { -8, 53 },
{ -14, 59 }, { -9, 52 }, { -11, 68 }, { 9, -2 },
{ 30, -10 }, { 31, -4 }, { 33, -1 }, { 33, 7 },
{ 31, 12 }, { 37, 23 }, { 31, 38 }, { 20, 64 },
{ -9, 71 }, { -7, 37 }, { -8, 44 }, { -11, 49 },
{ -10, 56 }, { -12, 59 }, { -8, 63 }, { -9, 67 },
{ -6, 68 }, { -10, 79 },
/* 436 - 459 */
{ -3, 78 }, { -8, 74 }, { -9, 72 }, { -10, 72 },
{ -18, 75 }, { -12, 71 }, { -11, 63 }, { -5, 70 },
{ -17, 75 }, { -14, 72 }, { -16, 67 }, { -8, 53 },
{ -14, 59 }, { -9, 52 }, { -11, 68 }, { 9, -2 },
{ 30, -10 }, { 31, -4 }, { 33, -1 }, { 33, 7 },
{ 31, 12 }, { 37, 23 }, { 31, 38 }, { 20, 64 },
}
};
void ff_h264_init_cabac_states(H264Context *h) {
MpegEncContext * const s = &h->s;
int i;
/* calculate pre-state */
for( i= 0; i < 460; i++ ) {
int pre;
if( h->slice_type_nos == FF_I_TYPE )
pre = av_clip( ((cabac_context_init_I[i][0] * s->qscale) >>4 ) + cabac_context_init_I[i][1], 1, 126 );
else
pre = av_clip( ((cabac_context_init_PB[h->cabac_init_idc][i][0] * s->qscale) >>4 ) + cabac_context_init_PB[h->cabac_init_idc][i][1], 1, 126 );
if( pre <= 63 )
h->cabac_state[i] = 2 * ( 63 - pre ) + 0;
else
h->cabac_state[i] = 2 * ( pre - 64 ) + 1;
}
}
static int decode_cabac_field_decoding_flag(H264Context *h) {
MpegEncContext * const s = &h->s;
const long mba_xy = h->mb_xy - 1L;
const long mbb_xy = h->mb_xy - 2L*s->mb_stride;
unsigned long ctx = 0;
ctx += (s->current_picture.mb_type[mba_xy]>>7)&(h->slice_table[mba_xy] == h->slice_num);
ctx += (s->current_picture.mb_type[mbb_xy]>>7)&(h->slice_table[mbb_xy] == h->slice_num);
return get_cabac_noinline( &h->cabac, &(h->cabac_state+70)[ctx] );
}
static int decode_cabac_intra_mb_type(H264Context *h, int ctx_base, int intra_slice) {
uint8_t *state= &h->cabac_state[ctx_base];
int mb_type;
if(intra_slice){
MpegEncContext * const s = &h->s;
const int mba_xy = h->left_mb_xy[0];
const int mbb_xy = h->top_mb_xy;
int ctx=0;
if( h->slice_table[mba_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mba_xy] ) )
ctx++;
if( h->slice_table[mbb_xy] == h->slice_num && !IS_INTRA4x4( s->current_picture.mb_type[mbb_xy] ) )
ctx++;
if( get_cabac_noinline( &h->cabac, &state[ctx] ) == 0 )
return 0; /* I4x4 */
state += 2;
}else{
if( get_cabac_noinline( &h->cabac, state ) == 0 )
return 0; /* I4x4 */
}
if( get_cabac_terminate( &h->cabac ) )
return 25; /* PCM */
mb_type = 1; /* I16x16 */
mb_type += 12 * get_cabac_noinline( &h->cabac, &state[1] ); /* cbp_luma != 0 */
if( get_cabac_noinline( &h->cabac, &state[2] ) ) /* cbp_chroma */
mb_type += 4 + 4 * get_cabac_noinline( &h->cabac, &state[2+intra_slice] );
mb_type += 2 * get_cabac_noinline( &h->cabac, &state[3+intra_slice] );
mb_type += 1 * get_cabac_noinline( &h->cabac, &state[3+2*intra_slice] );
return mb_type;
}
static int decode_cabac_mb_type_b( H264Context *h ) {
MpegEncContext * const s = &h->s;
const int mba_xy = h->left_mb_xy[0];
const int mbb_xy = h->top_mb_xy;
int ctx = 0;
int bits;
assert(h->slice_type_nos == FF_B_TYPE);
if( h->slice_table[mba_xy] == h->slice_num && !IS_DIRECT( s->current_picture.mb_type[mba_xy] ) )
ctx++;
if( h->slice_table[mbb_xy] == h->slice_num && !IS_DIRECT( s->current_picture.mb_type[mbb_xy] ) )
ctx++;
if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+ctx] ) )
return 0; /* B_Direct_16x16 */
if( !get_cabac_noinline( &h->cabac, &h->cabac_state[27+3] ) ) {
return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ); /* B_L[01]_16x16 */
}
bits = get_cabac_noinline( &h->cabac, &h->cabac_state[27+4] ) << 3;
bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 2;
bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] ) << 1;
bits|= get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
if( bits < 8 )
return bits + 3; /* B_Bi_16x16 through B_L1_L0_16x8 */
else if( bits == 13 ) {
return decode_cabac_intra_mb_type(h, 32, 0) + 23;
} else if( bits == 14 )
return 11; /* B_L1_L0_8x16 */
else if( bits == 15 )
return 22; /* B_8x8 */
bits= ( bits<<1 ) | get_cabac_noinline( &h->cabac, &h->cabac_state[27+5] );
return bits - 4; /* B_L0_Bi_* through B_Bi_Bi_* */
}
static int decode_cabac_mb_skip( H264Context *h, int mb_x, int mb_y ) {
MpegEncContext * const s = &h->s;
int mba_xy, mbb_xy;
int ctx = 0;
if(FRAME_MBAFF){ //FIXME merge with the stuff in fill_caches?
int mb_xy = mb_x + (mb_y&~1)*s->mb_stride;
mba_xy = mb_xy - 1;
if( (mb_y&1)
&& h->slice_table[mba_xy] == h->slice_num
&& MB_FIELD == !!IS_INTERLACED( s->current_picture.mb_type[mba_xy] ) )
mba_xy += s->mb_stride;
if( MB_FIELD ){
mbb_xy = mb_xy - s->mb_stride;
if( !(mb_y&1)
&& h->slice_table[mbb_xy] == h->slice_num
&& IS_INTERLACED( s->current_picture.mb_type[mbb_xy] ) )
mbb_xy -= s->mb_stride;
}else
mbb_xy = mb_x + (mb_y-1)*s->mb_stride;
}else{
int mb_xy = h->mb_xy;
mba_xy = mb_xy - 1;
mbb_xy = mb_xy - (s->mb_stride << FIELD_PICTURE);
}
if( h->slice_table[mba_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mba_xy] ))
ctx++;
if( h->slice_table[mbb_xy] == h->slice_num && !IS_SKIP( s->current_picture.mb_type[mbb_xy] ))
ctx++;
if( h->slice_type_nos == FF_B_TYPE )
ctx += 13;
return get_cabac_noinline( &h->cabac, &h->cabac_state[11+ctx] );
}
static int decode_cabac_mb_intra4x4_pred_mode( H264Context *h, int pred_mode ) {
int mode = 0;
if( get_cabac( &h->cabac, &h->cabac_state[68] ) )
return pred_mode;
mode += 1 * get_cabac( &h->cabac, &h->cabac_state[69] );
mode += 2 * get_cabac( &h->cabac, &h->cabac_state[69] );
mode += 4 * get_cabac( &h->cabac, &h->cabac_state[69] );
if( mode >= pred_mode )
return mode + 1;
else
return mode;
}
static int decode_cabac_mb_chroma_pre_mode( H264Context *h) {
const int mba_xy = h->left_mb_xy[0];
const int mbb_xy = h->top_mb_xy;
int ctx = 0;
/* No need to test for IS_INTRA4x4 and IS_INTRA16x16, as we set chroma_pred_mode_table to 0 */
if( h->slice_table[mba_xy] == h->slice_num && h->chroma_pred_mode_table[mba_xy] != 0 )
ctx++;
if( h->slice_table[mbb_xy] == h->slice_num && h->chroma_pred_mode_table[mbb_xy] != 0 )
ctx++;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+ctx] ) == 0 )
return 0;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
return 1;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[64+3] ) == 0 )
return 2;
else
return 3;
}
static int decode_cabac_mb_cbp_luma( H264Context *h) {
int cbp_b, cbp_a, ctx, cbp = 0;
cbp_a = h->slice_table[h->left_mb_xy[0]] == h->slice_num ? h->left_cbp : -1;
cbp_b = h->slice_table[h->top_mb_xy] == h->slice_num ? h->top_cbp : -1;
ctx = !(cbp_a & 0x02) + 2 * !(cbp_b & 0x04);
cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]);
ctx = !(cbp & 0x01) + 2 * !(cbp_b & 0x08);
cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 1;
ctx = !(cbp_a & 0x08) + 2 * !(cbp & 0x01);
cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 2;
ctx = !(cbp & 0x04) + 2 * !(cbp & 0x02);
cbp |= get_cabac_noinline(&h->cabac, &h->cabac_state[73 + ctx]) << 3;
return cbp;
}
static int decode_cabac_mb_cbp_chroma( H264Context *h) {
int ctx;
int cbp_a, cbp_b;
cbp_a = (h->left_cbp>>4)&0x03;
cbp_b = (h-> top_cbp>>4)&0x03;
ctx = 0;
if( cbp_a > 0 ) ctx++;
if( cbp_b > 0 ) ctx += 2;
if( get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] ) == 0 )
return 0;
ctx = 4;
if( cbp_a == 2 ) ctx++;
if( cbp_b == 2 ) ctx += 2;
return 1 + get_cabac_noinline( &h->cabac, &h->cabac_state[77 + ctx] );
}
static int decode_cabac_mb_dqp( H264Context *h) {
int ctx= h->last_qscale_diff != 0;
int val = 0;
while( get_cabac_noinline( &h->cabac, &h->cabac_state[60 + ctx] ) ) {
ctx= 2+(ctx>>1);
val++;
if(val > 102) //prevent infinite loop
return INT_MIN;
}
if( val&0x01 )
return (val + 1)>>1 ;
else
return -((val + 1)>>1);
}
static int decode_cabac_p_mb_sub_type( H264Context *h ) {
if( get_cabac( &h->cabac, &h->cabac_state[21] ) )
return 0; /* 8x8 */
if( !get_cabac( &h->cabac, &h->cabac_state[22] ) )
return 1; /* 8x4 */
if( get_cabac( &h->cabac, &h->cabac_state[23] ) )
return 2; /* 4x8 */
return 3; /* 4x4 */
}
static int decode_cabac_b_mb_sub_type( H264Context *h ) {
int type;
if( !get_cabac( &h->cabac, &h->cabac_state[36] ) )
return 0; /* B_Direct_8x8 */
if( !get_cabac( &h->cabac, &h->cabac_state[37] ) )
return 1 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L0_8x8, B_L1_8x8 */
type = 3;
if( get_cabac( &h->cabac, &h->cabac_state[38] ) ) {
if( get_cabac( &h->cabac, &h->cabac_state[39] ) )
return 11 + get_cabac( &h->cabac, &h->cabac_state[39] ); /* B_L1_4x4, B_Bi_4x4 */
type += 4;
}
type += 2*get_cabac( &h->cabac, &h->cabac_state[39] );
type += get_cabac( &h->cabac, &h->cabac_state[39] );
return type;
}
static inline int decode_cabac_mb_transform_size( H264Context *h ) {
return get_cabac_noinline( &h->cabac, &h->cabac_state[399 + h->neighbor_transform_size] );
}
static int decode_cabac_mb_ref( H264Context *h, int list, int n ) {
int refa = h->ref_cache[list][scan8[n] - 1];
int refb = h->ref_cache[list][scan8[n] - 8];
int ref = 0;
int ctx = 0;
if( h->slice_type_nos == FF_B_TYPE) {
if( refa > 0 && !h->direct_cache[scan8[n] - 1] )
ctx++;
if( refb > 0 && !h->direct_cache[scan8[n] - 8] )
ctx += 2;
} else {
if( refa > 0 )
ctx++;
if( refb > 0 )
ctx += 2;
}
while( get_cabac( &h->cabac, &h->cabac_state[54+ctx] ) ) {
ref++;
ctx = (ctx>>2)+4;
if(ref >= 32 /*h->ref_list[list]*/){
return -1;
}
}
return ref;
}
static int decode_cabac_mb_mvd( H264Context *h, int list, int n, int l ) {
int amvd = abs( h->mvd_cache[list][scan8[n] - 1][l] ) +
abs( h->mvd_cache[list][scan8[n] - 8][l] );
int ctxbase = (l == 0) ? 40 : 47;
int mvd;
int ctx = (amvd>2) + (amvd>32);
if(!get_cabac(&h->cabac, &h->cabac_state[ctxbase+ctx]))
return 0;
mvd= 1;
ctx= 3;
while( mvd < 9 && get_cabac( &h->cabac, &h->cabac_state[ctxbase+ctx] ) ) {
mvd++;
if( ctx < 6 )
ctx++;
}
if( mvd >= 9 ) {
int k = 3;
while( get_cabac_bypass( &h->cabac ) ) {
mvd += 1 << k;
k++;
if(k>24){
av_log(h->s.avctx, AV_LOG_ERROR, "overflow in decode_cabac_mb_mvd\n");
return INT_MIN;
}
}
while( k-- ) {
if( get_cabac_bypass( &h->cabac ) )
mvd += 1 << k;
}
}
return get_cabac_bypass_sign( &h->cabac, -mvd );
}
static av_always_inline int get_cabac_cbf_ctx( H264Context *h, int cat, int idx, int is_dc ) {
int nza, nzb;
int ctx = 0;
if( is_dc ) {
if( cat == 0 ) {
nza = h->left_cbp&0x100;
nzb = h-> top_cbp&0x100;
} else {
nza = (h->left_cbp>>(6+idx))&0x01;
nzb = (h-> top_cbp>>(6+idx))&0x01;
}
} else {
assert(cat == 1 || cat == 2 || cat == 4);
nza = h->non_zero_count_cache[scan8[idx] - 1];
nzb = h->non_zero_count_cache[scan8[idx] - 8];
}
if( nza > 0 )
ctx++;
if( nzb > 0 )
ctx += 2;
return ctx + 4 * cat;
}
DECLARE_ASM_CONST(1, uint8_t, last_coeff_flag_offset_8x8)[63] = {
0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8
};
static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff, int is_dc ) {
static const int significant_coeff_flag_offset[2][6] = {
{ 105+0, 105+15, 105+29, 105+44, 105+47, 402 },
{ 277+0, 277+15, 277+29, 277+44, 277+47, 436 }
};
static const int last_coeff_flag_offset[2][6] = {
{ 166+0, 166+15, 166+29, 166+44, 166+47, 417 },
{ 338+0, 338+15, 338+29, 338+44, 338+47, 451 }
};
static const int coeff_abs_level_m1_offset[6] = {
227+0, 227+10, 227+20, 227+30, 227+39, 426
};
static const uint8_t significant_coeff_flag_offset_8x8[2][63] = {
{ 0, 1, 2, 3, 4, 5, 5, 4, 4, 3, 3, 4, 4, 4, 5, 5,
4, 4, 4, 4, 3, 3, 6, 7, 7, 7, 8, 9,10, 9, 8, 7,
7, 6,11,12,13,11, 6, 7, 8, 9,14,10, 9, 8, 6,11,
12,13,11, 6, 9,14,10, 9,11,12,13,11,14,10,12 },
{ 0, 1, 1, 2, 2, 3, 3, 4, 5, 6, 7, 7, 7, 8, 4, 5,
6, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,11,12,11,
9, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,13,13, 9,
9,10,10, 8,13,13, 9, 9,10,10,14,14,14,14,14 }
};
/* node ctx: 0..3: abslevel1 (with abslevelgt1 == 0).
* 4..7: abslevelgt1 + 3 (and abslevel1 doesn't matter).
* map node ctx => cabac ctx for level=1 */
static const uint8_t coeff_abs_level1_ctx[8] = { 1, 2, 3, 4, 0, 0, 0, 0 };
/* map node ctx => cabac ctx for level>1 */
static const uint8_t coeff_abs_levelgt1_ctx[8] = { 5, 5, 5, 5, 6, 7, 8, 9 };
static const uint8_t coeff_abs_level_transition[2][8] = {
/* update node ctx after decoding a level=1 */
{ 1, 2, 3, 3, 4, 5, 6, 7 },
/* update node ctx after decoding a level>1 */
{ 4, 4, 4, 4, 5, 6, 7, 7 }
};
int index[64];
int av_unused last;
int coeff_count = 0;
int node_ctx = 0;
uint8_t *significant_coeff_ctx_base;
uint8_t *last_coeff_ctx_base;
uint8_t *abs_level_m1_ctx_base;
#if !ARCH_X86
#define CABAC_ON_STACK
#endif
#ifdef CABAC_ON_STACK
#define CC &cc
CABACContext cc;
cc.range = h->cabac.range;
cc.low = h->cabac.low;
cc.bytestream= h->cabac.bytestream;
#else
#define CC &h->cabac
#endif
/* cat: 0-> DC 16x16 n = 0
* 1-> AC 16x16 n = luma4x4idx
* 2-> Luma4x4 n = luma4x4idx
* 3-> DC Chroma n = iCbCr
* 4-> AC Chroma n = 16 + 4 * iCbCr + chroma4x4idx
* 5-> Luma8x8 n = 4 * luma8x8idx
*/
/* read coded block flag */
if( is_dc || cat != 5 ) {
if( get_cabac( CC, &h->cabac_state[85 + get_cabac_cbf_ctx( h, cat, n, is_dc ) ] ) == 0 ) {
if( !is_dc )
h->non_zero_count_cache[scan8[n]] = 0;
#ifdef CABAC_ON_STACK
h->cabac.range = cc.range ;
h->cabac.low = cc.low ;
h->cabac.bytestream= cc.bytestream;
#endif
return;
}
}
significant_coeff_ctx_base = h->cabac_state
+ significant_coeff_flag_offset[MB_FIELD][cat];
last_coeff_ctx_base = h->cabac_state
+ last_coeff_flag_offset[MB_FIELD][cat];
abs_level_m1_ctx_base = h->cabac_state
+ coeff_abs_level_m1_offset[cat];
if( !is_dc && cat == 5 ) {
#define DECODE_SIGNIFICANCE( coefs, sig_off, last_off ) \
for(last= 0; last < coefs; last++) { \
uint8_t *sig_ctx = significant_coeff_ctx_base + sig_off; \
if( get_cabac( CC, sig_ctx )) { \
uint8_t *last_ctx = last_coeff_ctx_base + last_off; \
index[coeff_count++] = last; \
if( get_cabac( CC, last_ctx ) ) { \
last= max_coeff; \
break; \
} \
} \
}\
if( last == max_coeff -1 ) {\
index[coeff_count++] = last;\
}
const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];
#if ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, sig_off);
} else {
coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index);
#else
DECODE_SIGNIFICANCE( 63, sig_off[last], last_coeff_flag_offset_8x8[last] );
} else {
DECODE_SIGNIFICANCE( max_coeff - 1, last, last );
#endif
}
assert(coeff_count > 0);
if( is_dc ) {
if( cat == 0 )
h->cbp_table[h->mb_xy] |= 0x100;
else
h->cbp_table[h->mb_xy] |= 0x40 << n;
} else {
if( cat == 5 )
fill_rectangle(&h->non_zero_count_cache[scan8[n]], 2, 2, 8, coeff_count, 1);
else {
assert( cat == 1 || cat == 2 || cat == 4 );
h->non_zero_count_cache[scan8[n]] = coeff_count;
}
}
do {
uint8_t *ctx = coeff_abs_level1_ctx[node_ctx] + abs_level_m1_ctx_base;
int j= scantable[index[--coeff_count]];
if( get_cabac( CC, ctx ) == 0 ) {
node_ctx = coeff_abs_level_transition[0][node_ctx];
if( is_dc ) {
block[j] = get_cabac_bypass_sign( CC, -1);
}else{
block[j] = (get_cabac_bypass_sign( CC, -qmul[j]) + 32) >> 6;
}
} else {
int coeff_abs = 2;
ctx = coeff_abs_levelgt1_ctx[node_ctx] + abs_level_m1_ctx_base;
node_ctx = coeff_abs_level_transition[1][node_ctx];
while( coeff_abs < 15 && get_cabac( CC, ctx ) ) {
coeff_abs++;
}
if( coeff_abs >= 15 ) {
int j = 0;
while( get_cabac_bypass( CC ) ) {
j++;
}
coeff_abs=1;
while( j-- ) {
coeff_abs += coeff_abs + get_cabac_bypass( CC );
}
coeff_abs+= 14;
}
if( is_dc ) {
block[j] = get_cabac_bypass_sign( CC, -coeff_abs );
}else{
block[j] = (get_cabac_bypass_sign( CC, -coeff_abs ) * qmul[j] + 32) >> 6;
}
}
} while( coeff_count );
#ifdef CABAC_ON_STACK
h->cabac.range = cc.range ;
h->cabac.low = cc.low ;
h->cabac.bytestream= cc.bytestream;
#endif
}
#if !CONFIG_SMALL
static void decode_cabac_residual_dc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 1);
}
static void decode_cabac_residual_nondc( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, 0);
}
#endif
static void decode_cabac_residual( H264Context *h, DCTELEM *block, int cat, int n, const uint8_t *scantable, const uint32_t *qmul, int max_coeff ) {
#if CONFIG_SMALL
decode_cabac_residual_internal(h, block, cat, n, scantable, qmul, max_coeff, cat == 0 || cat == 3);
#else
if( cat == 0 || cat == 3 ) decode_cabac_residual_dc(h, block, cat, n, scantable, qmul, max_coeff);
else decode_cabac_residual_nondc(h, block, cat, n, scantable, qmul, max_coeff);
#endif
}
static inline void compute_mb_neighbors(H264Context *h)
{
MpegEncContext * const s = &h->s;
const int mb_xy = h->mb_xy;
h->top_mb_xy = mb_xy - s->mb_stride;
h->left_mb_xy[0] = mb_xy - 1;
if(FRAME_MBAFF){
const int pair_xy = s->mb_x + (s->mb_y & ~1)*s->mb_stride;
const int top_pair_xy = pair_xy - s->mb_stride;
const int top_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[top_pair_xy]);
const int left_mb_field_flag = IS_INTERLACED(s->current_picture.mb_type[pair_xy-1]);
const int curr_mb_field_flag = MB_FIELD;
const int bottom = (s->mb_y & 1);
if (curr_mb_field_flag && (bottom || top_mb_field_flag)){
h->top_mb_xy -= s->mb_stride;
}
if (!left_mb_field_flag == curr_mb_field_flag) {
h->left_mb_xy[0] = pair_xy - 1;
}
} else if (FIELD_PICTURE) {
h->top_mb_xy -= s->mb_stride;
}
return;
}
/**
* decodes a macroblock
* @returns 0 if OK, AC_ERROR / DC_ERROR / MV_ERROR if an error is noticed
*/
int ff_h264_decode_mb_cabac(H264Context *h) {
MpegEncContext * const s = &h->s;
int mb_xy;
int mb_type, partition_count, cbp = 0;
int dct8x8_allowed= h->pps.transform_8x8_mode;
mb_xy = h->mb_xy = s->mb_x + s->mb_y*s->mb_stride;
tprintf(s->avctx, "pic:%d mb:%d/%d\n", h->frame_num, s->mb_x, s->mb_y);
if( h->slice_type_nos != FF_I_TYPE ) {
int skip;
/* a skipped mb needs the aff flag from the following mb */
if( FRAME_MBAFF && s->mb_x==0 && (s->mb_y&1)==0 )
predict_field_decoding_flag(h);
if( FRAME_MBAFF && (s->mb_y&1)==1 && h->prev_mb_skipped )
skip = h->next_mb_skipped;
else
skip = decode_cabac_mb_skip( h, s->mb_x, s->mb_y );
/* read skip flags */
if( skip ) {
if( FRAME_MBAFF && (s->mb_y&1)==0 ){
s->current_picture.mb_type[mb_xy] = MB_TYPE_SKIP;
h->next_mb_skipped = decode_cabac_mb_skip( h, s->mb_x, s->mb_y+1 );
if(!h->next_mb_skipped)
h->mb_mbaff = h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
}
decode_mb_skip(h);
h->cbp_table[mb_xy] = 0;
h->chroma_pred_mode_table[mb_xy] = 0;
h->last_qscale_diff = 0;
return 0;
}
}
if(FRAME_MBAFF){
if( (s->mb_y&1) == 0 )
h->mb_mbaff =
h->mb_field_decoding_flag = decode_cabac_field_decoding_flag(h);
}
h->prev_mb_skipped = 0;
compute_mb_neighbors(h);
if( h->slice_type_nos == FF_B_TYPE ) {
mb_type = decode_cabac_mb_type_b( h );
if( mb_type < 23 ){
partition_count= b_mb_type_info[mb_type].partition_count;
mb_type= b_mb_type_info[mb_type].type;
}else{
mb_type -= 23;
goto decode_intra_mb;
}
} else if( h->slice_type_nos == FF_P_TYPE ) {
if( get_cabac_noinline( &h->cabac, &h->cabac_state[14] ) == 0 ) {
/* P-type */
if( get_cabac_noinline( &h->cabac, &h->cabac_state[15] ) == 0 ) {
/* P_L0_D16x16, P_8x8 */
mb_type= 3 * get_cabac_noinline( &h->cabac, &h->cabac_state[16] );
} else {
/* P_L0_D8x16, P_L0_D16x8 */
mb_type= 2 - get_cabac_noinline( &h->cabac, &h->cabac_state[17] );
}
partition_count= p_mb_type_info[mb_type].partition_count;
mb_type= p_mb_type_info[mb_type].type;
} else {
mb_type= decode_cabac_intra_mb_type(h, 17, 0);
goto decode_intra_mb;
}
} else {
mb_type= decode_cabac_intra_mb_type(h, 3, 1);
if(h->slice_type == FF_SI_TYPE && mb_type)
mb_type--;
assert(h->slice_type_nos == FF_I_TYPE);
decode_intra_mb:
partition_count = 0;
cbp= i_mb_type_info[mb_type].cbp;
h->intra16x16_pred_mode= i_mb_type_info[mb_type].pred_mode;
mb_type= i_mb_type_info[mb_type].type;
}
if(MB_FIELD)
mb_type |= MB_TYPE_INTERLACED;
h->slice_table[ mb_xy ]= h->slice_num;
if(IS_INTRA_PCM(mb_type)) {
const uint8_t *ptr;
// We assume these blocks are very rare so we do not optimize it.
// FIXME The two following lines get the bitstream position in the cabac
// decode, I think it should be done by a function in cabac.h (or cabac.c).
ptr= h->cabac.bytestream;
if(h->cabac.low&0x1) ptr--;
if(CABAC_BITS==16){
if(h->cabac.low&0x1FF) ptr--;
}
// The pixels are stored in the same order as levels in h->mb array.
memcpy(h->mb, ptr, 256); ptr+=256;
if(CHROMA){
memcpy(h->mb+128, ptr, 128); ptr+=128;
}
ff_init_cabac_decoder(&h->cabac, ptr, h->cabac.bytestream_end - ptr);
// All blocks are present
h->cbp_table[mb_xy] = 0x1ef;
h->chroma_pred_mode_table[mb_xy] = 0;
// In deblocking, the quantizer is 0
s->current_picture.qscale_table[mb_xy]= 0;
// All coeffs are present
memset(h->non_zero_count[mb_xy], 16, 32);
s->current_picture.mb_type[mb_xy]= mb_type;
h->last_qscale_diff = 0;
return 0;
}
if(MB_MBAFF){
h->ref_count[0] <<= 1;
h->ref_count[1] <<= 1;
}
fill_decode_caches(h, mb_type);
if( IS_INTRA( mb_type ) ) {
int i, pred_mode;
if( IS_INTRA4x4( mb_type ) ) {
if( dct8x8_allowed && decode_cabac_mb_transform_size( h ) ) {
mb_type |= MB_TYPE_8x8DCT;
for( i = 0; i < 16; i+=4 ) {
int pred = pred_intra_mode( h, i );
int mode = decode_cabac_mb_intra4x4_pred_mode( h, pred );
fill_rectangle( &h->intra4x4_pred_mode_cache[ scan8[i] ], 2, 2, 8, mode, 1 );
}
} else {
for( i = 0; i < 16; i++ ) {
int pred = pred_intra_mode( h, i );
h->intra4x4_pred_mode_cache[ scan8[i] ] = decode_cabac_mb_intra4x4_pred_mode( h, pred );
//av_log( s->avctx, AV_LOG_ERROR, "i4x4 pred=%d mode=%d\n", pred, h->intra4x4_pred_mode_cache[ scan8[i] ] );
}
}
ff_h264_write_back_intra_pred_mode(h);
if( ff_h264_check_intra4x4_pred_mode(h) < 0 ) return -1;
} else {
h->intra16x16_pred_mode= ff_h264_check_intra_pred_mode( h, h->intra16x16_pred_mode );
if( h->intra16x16_pred_mode < 0 ) return -1;
}
if(CHROMA){
h->chroma_pred_mode_table[mb_xy] =
pred_mode = decode_cabac_mb_chroma_pre_mode( h );
pred_mode= ff_h264_check_intra_pred_mode( h, pred_mode );
if( pred_mode < 0 ) return -1;
h->chroma_pred_mode= pred_mode;
}
} else if( partition_count == 4 ) {
int i, j, sub_partition_count[4], list, ref[2][4];
if( h->slice_type_nos == FF_B_TYPE ) {
for( i = 0; i < 4; i++ ) {
h->sub_mb_type[i] = decode_cabac_b_mb_sub_type( h );
sub_partition_count[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
h->sub_mb_type[i]= b_sub_mb_type_info[ h->sub_mb_type[i] ].type;
}
if( IS_DIRECT(h->sub_mb_type[0] | h->sub_mb_type[1] |
h->sub_mb_type[2] | h->sub_mb_type[3]) ) {
ff_h264_pred_direct_motion(h, &mb_type);
h->ref_cache[0][scan8[4]] =
h->ref_cache[1][scan8[4]] =
h->ref_cache[0][scan8[12]] =
h->ref_cache[1][scan8[12]] = PART_NOT_AVAILABLE;
if( h->ref_count[0] > 1 || h->ref_count[1] > 1 ) {
for( i = 0; i < 4; i++ )
if( IS_DIRECT(h->sub_mb_type[i]) )
fill_rectangle( &h->direct_cache[scan8[4*i]], 2, 2, 8, 1, 1 );
}
}
} else {
for( i = 0; i < 4; i++ ) {
h->sub_mb_type[i] = decode_cabac_p_mb_sub_type( h );
sub_partition_count[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].partition_count;
h->sub_mb_type[i]= p_sub_mb_type_info[ h->sub_mb_type[i] ].type;
}
}
for( list = 0; list < h->list_count; list++ ) {
for( i = 0; i < 4; i++ ) {
if(IS_DIRECT(h->sub_mb_type[i])) continue;
if(IS_DIR(h->sub_mb_type[i], 0, list)){
if( h->ref_count[list] > 1 ){
ref[list][i] = decode_cabac_mb_ref( h, list, 4*i );
if(ref[list][i] >= (unsigned)h->ref_count[list]){
av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref[list][i], h->ref_count[list]);
return -1;
}
}else
ref[list][i] = 0;
} else {
ref[list][i] = -1;
}
h->ref_cache[list][ scan8[4*i]+1 ]=
h->ref_cache[list][ scan8[4*i]+8 ]=h->ref_cache[list][ scan8[4*i]+9 ]= ref[list][i];
}
}
if(dct8x8_allowed)
dct8x8_allowed = get_dct8x8_allowed(h);
for(list=0; list<h->list_count; list++){
for(i=0; i<4; i++){
h->ref_cache[list][ scan8[4*i] ]=h->ref_cache[list][ scan8[4*i]+1 ];
if(IS_DIRECT(h->sub_mb_type[i])){
fill_rectangle(h->mvd_cache[list][scan8[4*i]], 2, 2, 8, 0, 4);
continue;
}
if(IS_DIR(h->sub_mb_type[i], 0, list) && !IS_DIRECT(h->sub_mb_type[i])){
const int sub_mb_type= h->sub_mb_type[i];
const int block_width= (sub_mb_type & (MB_TYPE_16x16|MB_TYPE_16x8)) ? 2 : 1;
for(j=0; j<sub_partition_count[i]; j++){
int mpx, mpy;
int mx, my;
const int index= 4*i + block_width*j;
int16_t (* mv_cache)[2]= &h->mv_cache[list][ scan8[index] ];
int16_t (* mvd_cache)[2]= &h->mvd_cache[list][ scan8[index] ];
pred_motion(h, index, block_width, list, h->ref_cache[list][ scan8[index] ], &mpx, &mpy);
mx = mpx + decode_cabac_mb_mvd( h, list, index, 0 );
my = mpy + decode_cabac_mb_mvd( h, list, index, 1 );
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
if(IS_SUB_8X8(sub_mb_type)){
mv_cache[ 1 ][0]=
mv_cache[ 8 ][0]= mv_cache[ 9 ][0]= mx;
mv_cache[ 1 ][1]=
mv_cache[ 8 ][1]= mv_cache[ 9 ][1]= my;
mvd_cache[ 1 ][0]=
mvd_cache[ 8 ][0]= mvd_cache[ 9 ][0]= mx - mpx;
mvd_cache[ 1 ][1]=
mvd_cache[ 8 ][1]= mvd_cache[ 9 ][1]= my - mpy;
}else if(IS_SUB_8X4(sub_mb_type)){
mv_cache[ 1 ][0]= mx;
mv_cache[ 1 ][1]= my;
mvd_cache[ 1 ][0]= mx - mpx;
mvd_cache[ 1 ][1]= my - mpy;
}else if(IS_SUB_4X8(sub_mb_type)){
mv_cache[ 8 ][0]= mx;
mv_cache[ 8 ][1]= my;
mvd_cache[ 8 ][0]= mx - mpx;
mvd_cache[ 8 ][1]= my - mpy;
}
mv_cache[ 0 ][0]= mx;
mv_cache[ 0 ][1]= my;
mvd_cache[ 0 ][0]= mx - mpx;
mvd_cache[ 0 ][1]= my - mpy;
}
}else{
uint32_t *p= (uint32_t *)&h->mv_cache[list][ scan8[4*i] ][0];
uint32_t *pd= (uint32_t *)&h->mvd_cache[list][ scan8[4*i] ][0];
p[0] = p[1] = p[8] = p[9] = 0;
pd[0]= pd[1]= pd[8]= pd[9]= 0;
}
}
}
} else if( IS_DIRECT(mb_type) ) {
ff_h264_pred_direct_motion(h, &mb_type);
fill_rectangle(h->mvd_cache[0][scan8[0]], 4, 4, 8, 0, 4);
fill_rectangle(h->mvd_cache[1][scan8[0]], 4, 4, 8, 0, 4);
dct8x8_allowed &= h->sps.direct_8x8_inference_flag;
} else {
int list, mx, my, i, mpx, mpy;
if(IS_16X16(mb_type)){
for(list=0; list<h->list_count; list++){
if(IS_DIR(mb_type, 0, list)){
int ref;
if(h->ref_count[list] > 1){
ref= decode_cabac_mb_ref(h, list, 0);
if(ref >= (unsigned)h->ref_count[list]){
av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
return -1;
}
}else
ref=0;
fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, ref, 1);
}else
fill_rectangle(&h->ref_cache[list][ scan8[0] ], 4, 4, 8, (uint8_t)LIST_NOT_USED, 1); //FIXME factorize and the other fill_rect below too
}
for(list=0; list<h->list_count; list++){
if(IS_DIR(mb_type, 0, list)){
pred_motion(h, 0, 4, list, h->ref_cache[list][ scan8[0] ], &mpx, &mpy);
mx = mpx + decode_cabac_mb_mvd( h, list, 0, 0 );
my = mpy + decode_cabac_mb_mvd( h, list, 0, 1 );
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
fill_rectangle(h->mvd_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx-mpx,my-mpy), 4);
fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, pack16to32(mx,my), 4);
}else
fill_rectangle(h->mv_cache[list][ scan8[0] ], 4, 4, 8, 0, 4);
}
}
else if(IS_16X8(mb_type)){
for(list=0; list<h->list_count; list++){
for(i=0; i<2; i++){
if(IS_DIR(mb_type, i, list)){
int ref;
if(h->ref_count[list] > 1){
ref= decode_cabac_mb_ref( h, list, 8*i );
if(ref >= (unsigned)h->ref_count[list]){
av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
return -1;
}
}else
ref=0;
fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, ref, 1);
}else
fill_rectangle(&h->ref_cache[list][ scan8[0] + 16*i ], 4, 2, 8, (LIST_NOT_USED&0xFF), 1);
}
}
for(list=0; list<h->list_count; list++){
for(i=0; i<2; i++){
if(IS_DIR(mb_type, i, list)){
pred_16x8_motion(h, 8*i, list, h->ref_cache[list][scan8[0] + 16*i], &mpx, &mpy);
mx = mpx + decode_cabac_mb_mvd( h, list, 8*i, 0 );
my = mpy + decode_cabac_mb_mvd( h, list, 8*i, 1 );
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx-mpx,my-mpy), 4);
fill_rectangle(h->mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, pack16to32(mx,my), 4);
}else{
fill_rectangle(h->mvd_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
fill_rectangle(h-> mv_cache[list][ scan8[0] + 16*i ], 4, 2, 8, 0, 4);
}
}
}
}else{
assert(IS_8X16(mb_type));
for(list=0; list<h->list_count; list++){
for(i=0; i<2; i++){
if(IS_DIR(mb_type, i, list)){ //FIXME optimize
int ref;
if(h->ref_count[list] > 1){
ref= decode_cabac_mb_ref( h, list, 4*i );
if(ref >= (unsigned)h->ref_count[list]){
av_log(s->avctx, AV_LOG_ERROR, "Reference %d >= %d\n", ref, h->ref_count[list]);
return -1;
}
}else
ref=0;
fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, ref, 1);
}else
fill_rectangle(&h->ref_cache[list][ scan8[0] + 2*i ], 2, 4, 8, (LIST_NOT_USED&0xFF), 1);
}
}
for(list=0; list<h->list_count; list++){
for(i=0; i<2; i++){
if(IS_DIR(mb_type, i, list)){
pred_8x16_motion(h, i*4, list, h->ref_cache[list][ scan8[0] + 2*i ], &mpx, &mpy);
mx = mpx + decode_cabac_mb_mvd( h, list, 4*i, 0 );
my = mpy + decode_cabac_mb_mvd( h, list, 4*i, 1 );
tprintf(s->avctx, "final mv:%d %d\n", mx, my);
fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx-mpx,my-mpy), 4);
fill_rectangle(h->mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, pack16to32(mx,my), 4);
}else{
fill_rectangle(h->mvd_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
fill_rectangle(h-> mv_cache[list][ scan8[0] + 2*i ], 2, 4, 8, 0, 4);
}
}
}
}
}
if( IS_INTER( mb_type ) ) {
h->chroma_pred_mode_table[mb_xy] = 0;
write_back_motion( h, mb_type );
}
if( !IS_INTRA16x16( mb_type ) ) {
cbp = decode_cabac_mb_cbp_luma( h );
if(CHROMA)
cbp |= decode_cabac_mb_cbp_chroma( h ) << 4;
}
h->cbp_table[mb_xy] = h->cbp = cbp;
if( dct8x8_allowed && (cbp&15) && !IS_INTRA( mb_type ) ) {
if( decode_cabac_mb_transform_size( h ) )
mb_type |= MB_TYPE_8x8DCT;
}
s->current_picture.mb_type[mb_xy]= mb_type;
if( cbp || IS_INTRA16x16( mb_type ) ) {
const uint8_t *scan, *scan8x8, *dc_scan;
const uint32_t *qmul;
int dqp;
if(IS_INTERLACED(mb_type)){
scan8x8= s->qscale ? h->field_scan8x8 : h->field_scan8x8_q0;
scan= s->qscale ? h->field_scan : h->field_scan_q0;
dc_scan= luma_dc_field_scan;
}else{
scan8x8= s->qscale ? h->zigzag_scan8x8 : h->zigzag_scan8x8_q0;
scan= s->qscale ? h->zigzag_scan : h->zigzag_scan_q0;
dc_scan= luma_dc_zigzag_scan;
}
h->last_qscale_diff = dqp = decode_cabac_mb_dqp( h );
if( dqp == INT_MIN ){
av_log(h->s.avctx, AV_LOG_ERROR, "cabac decode of qscale diff failed at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
s->qscale += dqp;
if(((unsigned)s->qscale) > 51){
if(s->qscale<0) s->qscale+= 52;
else s->qscale-= 52;
}
h->chroma_qp[0] = get_chroma_qp(h, 0, s->qscale);
h->chroma_qp[1] = get_chroma_qp(h, 1, s->qscale);
if( IS_INTRA16x16( mb_type ) ) {
int i;
//av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 DC\n" );
decode_cabac_residual( h, h->mb, 0, 0, dc_scan, NULL, 16);
if( cbp&15 ) {
qmul = h->dequant4_coeff[0][s->qscale];
for( i = 0; i < 16; i++ ) {
//av_log( s->avctx, AV_LOG_ERROR, "INTRA16x16 AC:%d\n", i );
decode_cabac_residual(h, h->mb + 16*i, 1, i, scan + 1, qmul, 15);
}
} else {
fill_rectangle(&h->non_zero_count_cache[scan8[0]], 4, 4, 8, 0, 1);
}
} else {
int i8x8, i4x4;
for( i8x8 = 0; i8x8 < 4; i8x8++ ) {
if( cbp & (1<<i8x8) ) {
if( IS_8x8DCT(mb_type) ) {
decode_cabac_residual(h, h->mb + 64*i8x8, 5, 4*i8x8,
scan8x8, h->dequant8_coeff[IS_INTRA( mb_type ) ? 0:1][s->qscale], 64);
} else {
qmul = h->dequant4_coeff[IS_INTRA( mb_type ) ? 0:3][s->qscale];
for( i4x4 = 0; i4x4 < 4; i4x4++ ) {
const int index = 4*i8x8 + i4x4;
//av_log( s->avctx, AV_LOG_ERROR, "Luma4x4: %d\n", index );
//START_TIMER
decode_cabac_residual(h, h->mb + 16*index, 2, index, scan, qmul, 16);
//STOP_TIMER("decode_residual")
}
}
} else {
uint8_t * const nnz= &h->non_zero_count_cache[ scan8[4*i8x8] ];
nnz[0] = nnz[1] = nnz[8] = nnz[9] = 0;
}
}
}
if( cbp&0x30 ){
int c;
for( c = 0; c < 2; c++ ) {
//av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-DC\n",c );
decode_cabac_residual(h, h->mb + 256 + 16*4*c, 3, c, chroma_dc_scan, NULL, 4);
}
}
if( cbp&0x20 ) {
int c, i;
for( c = 0; c < 2; c++ ) {
qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]];
for( i = 0; i < 4; i++ ) {
const int index = 16 + 4 * c + i;
//av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16 );
decode_cabac_residual(h, h->mb + 16*index, 4, index, scan + 1, qmul, 15);
}
}
} else {
uint8_t * const nnz= &h->non_zero_count_cache[0];
nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
}
} else {
uint8_t * const nnz= &h->non_zero_count_cache[0];
fill_rectangle(&nnz[scan8[0]], 4, 4, 8, 0, 1);
nnz[ scan8[16]+0 ] = nnz[ scan8[16]+1 ] =nnz[ scan8[16]+8 ] =nnz[ scan8[16]+9 ] =
nnz[ scan8[20]+0 ] = nnz[ scan8[20]+1 ] =nnz[ scan8[20]+8 ] =nnz[ scan8[20]+9 ] = 0;
h->last_qscale_diff = 0;
}
s->current_picture.qscale_table[mb_xy]= s->qscale;
write_back_non_zero_count(h);
if(MB_MBAFF){
h->ref_count[0] >>= 1;
h->ref_count[1] >>= 1;
}
return 0;
}
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