yading@10: /*
yading@10:  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
yading@10:  * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de>
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder
yading@10:  * @author Stefan Gehrer <stefan.gehrer@gmx.de>
yading@10:  */
yading@10: 
yading@10: #include "libavutil/avassert.h"
yading@10: #include "avcodec.h"
yading@10: #include "get_bits.h"
yading@10: #include "golomb.h"
yading@10: #include "cavs.h"
yading@10: #include "internal.h"
yading@10: #include "mpeg12data.h"
yading@10: #include "mpegvideo.h"
yading@10: 
yading@10: static const uint8_t mv_scan[4] = {
yading@10:     MV_FWD_X0, MV_FWD_X1,
yading@10:     MV_FWD_X2, MV_FWD_X3
yading@10: };
yading@10: 
yading@10: static const uint8_t cbp_tab[64][2] = {
yading@10:   { 63,  0 }, { 15, 15 }, { 31, 63 }, { 47, 31 }, {  0, 16 }, { 14, 32 }, { 13, 47 }, { 11, 13 },
yading@10:   {  7, 14 }, {  5, 11 }, { 10, 12 }, {  8,  5 }, { 12, 10 }, { 61,  7 }, {  4, 48 }, { 55,  3 },
yading@10:   {  1,  2 }, {  2,  8 }, { 59,  4 }, {  3,  1 }, { 62, 61 }, {  9, 55 }, {  6, 59 }, { 29, 62 },
yading@10:   { 45, 29 }, { 51, 27 }, { 23, 23 }, { 39, 19 }, { 27, 30 }, { 46, 28 }, { 53,  9 }, { 30,  6 },
yading@10:   { 43, 60 }, { 37, 21 }, { 60, 44 }, { 16, 26 }, { 21, 51 }, { 28, 35 }, { 19, 18 }, { 35, 20 },
yading@10:   { 42, 24 }, { 26, 53 }, { 44, 17 }, { 32, 37 }, { 58, 39 }, { 24, 45 }, { 20, 58 }, { 17, 43 },
yading@10:   { 18, 42 }, { 48, 46 }, { 22, 36 }, { 33, 33 }, { 25, 34 }, { 49, 40 }, { 40, 52 }, { 36, 49 },
yading@10:   { 34, 50 }, { 50, 56 }, { 52, 25 }, { 54, 22 }, { 41, 54 }, { 56, 57 }, { 38, 41 }, { 57, 38 }
yading@10: };
yading@10: 
yading@10: static const uint8_t scan3x3[4] = { 4, 5, 7, 8 };
yading@10: 
yading@10: static const uint8_t cavs_chroma_qp[64] = {
yading@10:    0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
yading@10:   16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
yading@10:   32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 42, 43, 43, 44, 44,
yading@10:   45, 45, 46, 46, 47, 47, 48, 48, 48, 49, 49, 49, 50, 50, 50, 51
yading@10: };
yading@10: 
yading@10: static const uint8_t dequant_shift[64] = {
yading@10:   14, 14, 14, 14, 14, 14, 14, 14,
yading@10:   13, 13, 13, 13, 13, 13, 13, 13,
yading@10:   13, 12, 12, 12, 12, 12, 12, 12,
yading@10:   11, 11, 11, 11, 11, 11, 11, 11,
yading@10:   11, 10, 10, 10, 10, 10, 10, 10,
yading@10:   10,  9,  9,  9,  9,  9,  9,  9,
yading@10:   9,   8,  8,  8,  8,  8,  8,  8,
yading@10:   7,   7,  7,  7,  7,  7,  7,  7
yading@10: };
yading@10: 
yading@10: static const uint16_t dequant_mul[64] = {
yading@10:   32768, 36061, 38968, 42495, 46341, 50535, 55437, 60424,
yading@10:   32932, 35734, 38968, 42495, 46177, 50535, 55109, 59933,
yading@10:   65535, 35734, 38968, 42577, 46341, 50617, 55027, 60097,
yading@10:   32809, 35734, 38968, 42454, 46382, 50576, 55109, 60056,
yading@10:   65535, 35734, 38968, 42495, 46320, 50515, 55109, 60076,
yading@10:   65535, 35744, 38968, 42495, 46341, 50535, 55099, 60087,
yading@10:   65535, 35734, 38973, 42500, 46341, 50535, 55109, 60097,
yading@10:   32771, 35734, 38965, 42497, 46341, 50535, 55109, 60099
yading@10: };
yading@10: 
yading@10: #define EOB 0, 0, 0
yading@10: 
yading@10: static const struct dec_2dvlc intra_dec[7] = {
yading@10:     {
yading@10:         { //level / run / table_inc
yading@10:             {  1,  1,  1 }, { -1,  1,  1 }, {  1,  2,  1 }, { -1,  2,  1 }, {  1,  3,  1 }, { -1,  3, 1 },
yading@10:             {  1,  4,  1 }, { -1,  4,  1 }, {  1,  5,  1 }, { -1,  5,  1 }, {  1,  6,  1 }, { -1,  6, 1 },
yading@10:             {  1,  7,  1 }, { -1,  7,  1 }, {  1,  8,  1 }, { -1,  8,  1 }, {  1,  9,  1 }, { -1,  9, 1 },
yading@10:             {  1, 10,  1 }, { -1, 10,  1 }, {  1, 11,  1 }, { -1, 11,  1 }, {  2,  1,  2 }, { -2,  1, 2 },
yading@10:             {  1, 12,  1 }, { -1, 12,  1 }, {  1, 13,  1 }, { -1, 13,  1 }, {  1, 14,  1 }, { -1, 14, 1 },
yading@10:             {  1, 15,  1 }, { -1, 15,  1 }, {  2,  2,  2 }, { -2,  2,  2 }, {  1, 16,  1 }, { -1, 16, 1 },
yading@10:             {  1, 17,  1 }, { -1, 17,  1 }, {  3,  1,  3 }, { -3,  1,  3 }, {  1, 18,  1 }, { -1, 18, 1 },
yading@10:             {  1, 19,  1 }, { -1, 19,  1 }, {  2,  3,  2 }, { -2,  3,  2 }, {  1, 20,  1 }, { -1, 20, 1 },
yading@10:             {  1, 21,  1 }, { -1, 21,  1 }, {  2,  4,  2 }, { -2,  4,  2 }, {  1, 22,  1 }, { -1, 22, 1 },
yading@10:             {  2,  5,  2 }, { -2,  5,  2 }, {  1, 23,  1 }, { -1, 23,  1 }, {   EOB    }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         0, //inc_limit
yading@10:         23, //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  2,  1,  1 }, { -2,  1,  1 },
yading@10:             {  1,  3,  0 }, { -1,  3,  0 }, {     EOB    }, {  1,  4,  0 }, { -1,  4,  0 }, {  1,  5,  0 },
yading@10:             { -1,  5,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  3,  1,  2 }, { -3,  1,  2 }, {  2,  2,  1 },
yading@10:             { -2,  2,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  1,  8,  0 }, { -1,  8,  0 }, {  1,  9,  0 },
yading@10:             { -1,  9,  0 }, {  2,  3,  1 }, { -2,  3,  1 }, {  4,  1,  2 }, { -4,  1,  2 }, {  1, 10,  0 },
yading@10:             { -1, 10,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  2,  4,  1 }, { -2,  4,  1 }, {  3,  2,  2 },
yading@10:             { -3,  2,  2 }, {  1, 12,  0 }, { -1, 12,  0 }, {  2,  5,  1 }, { -2,  5,  1 }, {  5,  1,  3 },
yading@10:             { -5,  1,  3 }, {  1, 13,  0 }, { -1, 13,  0 }, {  2,  6,  1 }, { -2,  6,  1 }, {  1, 14,  0 },
yading@10:             { -1, 14,  0 }, {  2,  7,  1 }, { -2,  7,  1 }, {  2,  8,  1 }, { -2,  8,  1 }, {  3,  3,  2 },
yading@10:             { -3,  3,  2 }, {  6,  1,  3 }, { -6,  1,  3 }, {  1, 15,  0 }, { -1, 15,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         1, //inc_limit
yading@10:         15, //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 },
yading@10:             {  3,  1,  1 }, { -3,  1,  1 }, {     EOB    }, {  1,  3,  0 }, { -1,  3,  0 }, {  2,  2,  0 },
yading@10:             { -2,  2,  0 }, {  4,  1,  1 }, { -4,  1,  1 }, {  1,  4,  0 }, { -1,  4,  0 }, {  5,  1,  2 },
yading@10:             { -5,  1,  2 }, {  1,  5,  0 }, { -1,  5,  0 }, {  3,  2,  1 }, { -3,  2,  1 }, {  2,  3,  0 },
yading@10:             { -2,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  6,  1,  2 }, { -6,  1,  2 }, {  2,  4,  0 },
yading@10:             { -2,  4,  0 }, {  1,  7,  0 }, { -1,  7,  0 }, {  4,  2,  1 }, { -4,  2,  1 }, {  7,  1,  2 },
yading@10:             { -7,  1,  2 }, {  3,  3,  1 }, { -3,  3,  1 }, {  2,  5,  0 }, { -2,  5,  0 }, {  1,  8,  0 },
yading@10:             { -1,  8,  0 }, {  2,  6,  0 }, { -2,  6,  0 }, {  8,  1,  3 }, { -8,  1,  3 }, {  1,  9,  0 },
yading@10:             { -1,  9,  0 }, {  5,  2,  2 }, { -5,  2,  2 }, {  3,  4,  1 }, { -3,  4,  1 }, {  2,  7,  0 },
yading@10:             { -2,  7,  0 }, {  9,  1,  3 }, { -9,  1,  3 }, {  1, 10,  0 }, { -1, 10,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 10, 6, 4, 4, 3, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         2, //inc_limit
yading@10:         10, //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 }, { -3,  1,  0 },
yading@10:             {  1,  2,  0 }, { -1,  2,  0 }, {     EOB    }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  1 },
yading@10:             { -5,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  6,  1,  1 },
yading@10:             { -6,  1,  1 }, {  3,  2,  0 }, { -3,  2,  0 }, {  7,  1,  1 }, { -7,  1,  1 }, {  1,  4,  0 },
yading@10:             { -1,  4,  0 }, {  8,  1,  2 }, { -8,  1,  2 }, {  2,  3,  0 }, { -2,  3,  0 }, {  4,  2,  0 },
yading@10:             { -4,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  9,  1,  2 }, { -9,  1,  2 }, {  5,  2,  1 },
yading@10:             { -5,  2,  1 }, {  2,  4,  0 }, { -2,  4,  0 }, { 10,  1,  2 }, {-10,  1,  2 }, {  3,  3,  0 },
yading@10:             { -3,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, { 11,  1,  3 }, {-11,  1,  3 }, {  6,  2,  1 },
yading@10:             { -6,  2,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  2,  5,  0 }, { -2,  5,  0 }, {  3,  4,  0 },
yading@10:             { -3,  4,  0 }, { 12,  1,  3 }, {-12,  1,  3 }, {  4,  3,  0 }, { -4,  3,  0 }
yading@10:          },
yading@10:         //level_add
yading@10:         { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         4, //inc_limit
yading@10:         7, //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 }, { -3,  1,  0 },
yading@10:             {     EOB    }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 }, { -5,  1,  0 }, {  6,  1,  0 },
yading@10:             { -6,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  7,  1,  0 }, { -7,  1,  0 }, {  8,  1,  1 },
yading@10:             { -8,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  9,  1,  1 }, { -9,  1,  1 }, { 10,  1,  1 },
yading@10:             {-10,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, { 11,  1,  2 },
yading@10:             {-11,  1,  2 }, {  4,  2,  0 }, { -4,  2,  0 }, { 12,  1,  2 }, {-12,  1,  2 }, { 13,  1,  2 },
yading@10:             {-13,  1,  2 }, {  5,  2,  0 }, { -5,  2,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  2,  3,  0 },
yading@10:             { -2,  3,  0 }, { 14,  1,  2 }, {-14,  1,  2 }, {  6,  2,  0 }, { -6,  2,  0 }, { 15,  1,  2 },
yading@10:             {-15,  1,  2 }, { 16,  1,  2 }, {-16,  1,  2 }, {  3,  3,  0 }, { -3,  3,  0 }, {  1,  5,  0 },
yading@10:             { -1,  5,  0 }, {  7,  2,  0 }, { -7,  2,  0 }, { 17,  1,  2 }, {-17,  1,  2 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0,18, 8, 4, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         7, //inc_limit
yading@10:         5, //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
yading@10:             { -3,  1,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 }, { -5,  1,  0 }, {  6,  1,  0 },
yading@10:             { -6,  1,  0 }, {  7,  1,  0 }, { -7,  1,  0 }, {  8,  1,  0 }, { -8,  1,  0 }, {  9,  1,  0 },
yading@10:             { -9,  1,  0 }, { 10,  1,  0 }, {-10,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, { 11,  1,  1 },
yading@10:             {-11,  1,  1 }, { 12,  1,  1 }, {-12,  1,  1 }, { 13,  1,  1 }, {-13,  1,  1 }, {  2,  2,  0 },
yading@10:             { -2,  2,  0 }, { 14,  1,  1 }, {-14,  1,  1 }, { 15,  1,  1 }, {-15,  1,  1 }, {  3,  2,  0 },
yading@10:             { -3,  2,  0 }, { 16,  1,  1 }, {-16,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, { 17,  1,  1 },
yading@10:             {-17,  1,  1 }, {  4,  2,  0 }, { -4,  2,  0 }, { 18,  1,  1 }, {-18,  1,  1 }, {  5,  2,  0 },
yading@10:             { -5,  2,  0 }, { 19,  1,  1 }, {-19,  1,  1 }, { 20,  1,  1 }, {-20,  1,  1 }, {  6,  2,  0 },
yading@10:             { -6,  2,  0 }, { 21,  1,  1 }, {-21,  1,  1 }, {  2,  3,  0 }, { -2,  3,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 22, 7, 3, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         10, //inc_limit
yading@10:         3, //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
yading@10:             { -3,  1,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 }, { -5,  1,  0 }, {  6,  1,  0 },
yading@10:             { -6,  1,  0 }, {  7,  1,  0 }, { -7,  1,  0 }, {  8,  1,  0 }, { -8,  1,  0 }, {  9,  1,  0 },
yading@10:             { -9,  1,  0 }, { 10,  1,  0 }, {-10,  1,  0 }, { 11,  1,  0 }, {-11,  1,  0 }, { 12,  1,  0 },
yading@10:             {-12,  1,  0 }, { 13,  1,  0 }, {-13,  1,  0 }, { 14,  1,  0 }, {-14,  1,  0 }, { 15,  1,  0 },
yading@10:             {-15,  1,  0 }, { 16,  1,  0 }, {-16,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, { 17,  1,  0 },
yading@10:             {-17,  1,  0 }, { 18,  1,  0 }, {-18,  1,  0 }, { 19,  1,  0 }, {-19,  1,  0 }, { 20,  1,  0 },
yading@10:             {-20,  1,  0 }, { 21,  1,  0 }, {-21,  1,  0 }, {  2,  2,  0 }, { -2,  2,  0 }, { 22,  1,  0 },
yading@10:             {-22,  1,  0 }, { 23,  1,  0 }, {-23,  1,  0 }, { 24,  1,  0 }, {-24,  1,  0 }, { 25,  1,  0 },
yading@10:             {-25,  1,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, { 26,  1,  0 }, {-26,  1,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 27, 4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         INT_MAX, //inc_limit
yading@10:         2, //max_run
yading@10:     }
yading@10: };
yading@10: 
yading@10: static const struct dec_2dvlc inter_dec[7] = {
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  1 }, { -1,  1,  1 }, {  1,  2,  1 }, { -1,  2,  1 }, {  1,  3,  1 }, { -1,  3,  1 },
yading@10:             {  1,  4,  1 }, { -1,  4,  1 }, {  1,  5,  1 }, { -1,  5,  1 }, {  1,  6,  1 }, { -1,  6,  1 },
yading@10:             {  1,  7,  1 }, { -1,  7,  1 }, {  1,  8,  1 }, { -1,  8,  1 }, {  1,  9,  1 }, { -1,  9,  1 },
yading@10:             {  1, 10,  1 }, { -1, 10,  1 }, {  1, 11,  1 }, { -1, 11,  1 }, {  1, 12,  1 }, { -1, 12,  1 },
yading@10:             {  1, 13,  1 }, { -1, 13,  1 }, {  2,  1,  2 }, { -2,  1,  2 }, {  1, 14,  1 }, { -1, 14,  1 },
yading@10:             {  1, 15,  1 }, { -1, 15,  1 }, {  1, 16,  1 }, { -1, 16,  1 }, {  1, 17,  1 }, { -1, 17,  1 },
yading@10:             {  1, 18,  1 }, { -1, 18,  1 }, {  1, 19,  1 }, { -1, 19,  1 }, {  3,  1,  3 }, { -3,  1,  3 },
yading@10:             {  1, 20,  1 }, { -1, 20,  1 }, {  1, 21,  1 }, { -1, 21,  1 }, {  2,  2,  2 }, { -2,  2,  2 },
yading@10:             {  1, 22,  1 }, { -1, 22,  1 }, {  1, 23,  1 }, { -1, 23,  1 }, {  1, 24,  1 }, { -1, 24,  1 },
yading@10:             {  1, 25,  1 }, { -1, 25,  1 }, {  1, 26,  1 }, { -1, 26,  1 }, {   EOB    }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2 },
yading@10:         3, //golomb_order
yading@10:         0, //inc_limit
yading@10:         26 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  1,  2,  0 }, { -1,  2,  0 }, {  1,  3,  0 },
yading@10:             { -1,  3,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  1,  6,  0 },
yading@10:             { -1,  6,  0 }, {  2,  1,  1 }, { -2,  1,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  1,  8,  0 },
yading@10:             { -1,  8,  0 }, {  1,  9,  0 }, { -1,  9,  0 }, {  1, 10,  0 }, { -1, 10,  0 }, {  2,  2,  1 },
yading@10:             { -2,  2,  1 }, {  1, 11,  0 }, { -1, 11,  0 }, {  1, 12,  0 }, { -1, 12,  0 }, {  3,  1,  2 },
yading@10:             { -3,  1,  2 }, {  1, 13,  0 }, { -1, 13,  0 }, {  1, 14,  0 }, { -1, 14,  0 }, {  2,  3,  1 },
yading@10:             { -2,  3,  1 }, {  1, 15,  0 }, { -1, 15,  0 }, {  2,  4,  1 }, { -2,  4,  1 }, {  1, 16,  0 },
yading@10:             { -1, 16,  0 }, {  2,  5,  1 }, { -2,  5,  1 }, {  1, 17,  0 }, { -1, 17,  0 }, {  4,  1,  3 },
yading@10:             { -4,  1,  3 }, {  2,  6,  1 }, { -2,  6,  1 }, {  1, 18,  0 }, { -1, 18,  0 }, {  1, 19,  0 },
yading@10:             { -1, 19,  0 }, {  2,  7,  1 }, { -2,  7,  1 }, {  3,  2,  2 }, { -3,  2,  2 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         1, //inc_limit
yading@10:         19 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  1,  2,  0 }, { -1,  2,  0 }, {  2,  1,  0 },
yading@10:             { -2,  1,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  3,  1,  1 },
yading@10:             { -3,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  1,  6,  0 },
yading@10:             { -1,  6,  0 }, {  1,  7,  0 }, { -1,  7,  0 }, {  2,  3,  0 }, { -2,  3,  0 }, {  4,  1,  2 },
yading@10:             { -4,  1,  2 }, {  1,  8,  0 }, { -1,  8,  0 }, {  3,  2,  1 }, { -3,  2,  1 }, {  2,  4,  0 },
yading@10:             { -2,  4,  0 }, {  1,  9,  0 }, { -1,  9,  0 }, {  1, 10,  0 }, { -1, 10,  0 }, {  5,  1,  2 },
yading@10:             { -5,  1,  2 }, {  2,  5,  0 }, { -2,  5,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  2,  6,  0 },
yading@10:             { -2,  6,  0 }, {  1, 12,  0 }, { -1, 12,  0 }, {  3,  3,  1 }, { -3,  3,  1 }, {  6,  1,  2 },
yading@10:             { -6,  1,  2 }, {  4,  2,  2 }, { -4,  2,  2 }, {  1, 13,  0 }, { -1, 13,  0 }, {  2,  7,  0 },
yading@10:             { -2,  7,  0 }, {  3,  4,  1 }, { -3,  4,  1 }, {  1, 14,  0 }, { -1, 14,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         2, //inc_limit
yading@10:         14 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  2,  1,  0 }, { -2,  1,  0 }, {  1,  2,  0 },
yading@10:             { -1,  2,  0 }, {  3,  1,  0 }, { -3,  1,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  2,  2,  0 },
yading@10:             { -2,  2,  0 }, {  4,  1,  1 }, { -4,  1,  1 }, {  1,  4,  0 }, { -1,  4,  0 }, {  5,  1,  1 },
yading@10:             { -5,  1,  1 }, {  1,  5,  0 }, { -1,  5,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, {  2,  3,  0 },
yading@10:             { -2,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  6,  1,  1 }, { -6,  1,  1 }, {  2,  4,  0 },
yading@10:             { -2,  4,  0 }, {  1,  7,  0 }, { -1,  7,  0 }, {  4,  2,  1 }, { -4,  2,  1 }, {  7,  1,  2 },
yading@10:             { -7,  1,  2 }, {  3,  3,  0 }, { -3,  3,  0 }, {  1,  8,  0 }, { -1,  8,  0 }, {  2,  5,  0 },
yading@10:             { -2,  5,  0 }, {  8,  1,  2 }, { -8,  1,  2 }, {  1,  9,  0 }, { -1,  9,  0 }, {  3,  4,  0 },
yading@10:             { -3,  4,  0 }, {  2,  6,  0 }, { -2,  6,  0 }, {  5,  2,  1 }, { -5,  2,  1 }, {  1, 10,  0 },
yading@10:             { -1, 10,  0 }, {  9,  1,  2 }, { -9,  1,  2 }, {  4,  3,  1 }, { -4,  3,  1 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0,10, 6, 5, 4, 3, 3, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         3, //inc_limit
yading@10:         10 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
yading@10:             { -3,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  5,  1,  0 },
yading@10:             { -5,  1,  0 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  3,  0 }, { -1,  3,  0 }, {  6,  1,  0 },
yading@10:             { -6,  1,  0 }, {  3,  2,  0 }, { -3,  2,  0 }, {  7,  1,  1 }, { -7,  1,  1 }, {  1,  4,  0 },
yading@10:             { -1,  4,  0 }, {  8,  1,  1 }, { -8,  1,  1 }, {  2,  3,  0 }, { -2,  3,  0 }, {  4,  2,  0 },
yading@10:             { -4,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, {  9,  1,  1 }, { -9,  1,  1 }, {  5,  2,  0 },
yading@10:             { -5,  2,  0 }, {  2,  4,  0 }, { -2,  4,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, { 10,  1,  2 },
yading@10:             {-10,  1,  2 }, {  3,  3,  0 }, { -3,  3,  0 }, { 11,  1,  2 }, {-11,  1,  2 }, {  1,  7,  0 },
yading@10:             { -1,  7,  0 }, {  6,  2,  0 }, { -6,  2,  0 }, {  3,  4,  0 }, { -3,  4,  0 }, {  2,  5,  0 },
yading@10:             { -2,  5,  0 }, { 12,  1,  2 }, {-12,  1,  2 }, {  4,  3,  0 }, { -4,  3,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 13, 7, 5, 4, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         6, //inc_limit
yading@10:         7  //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {      EOB    }, {  1,  1,  0 }, {  -1,  1,  0 }, {  2,  1,  0 }, {  -2,  1,  0 }, {  3,  1,  0 },
yading@10:             {  -3,  1,  0 }, {  4,  1,  0 }, {  -4,  1,  0 }, {  5,  1,  0 }, {  -5,  1,  0 }, {  1,  2,  0 },
yading@10:             {  -1,  2,  0 }, {  6,  1,  0 }, {  -6,  1,  0 }, {  7,  1,  0 }, {  -7,  1,  0 }, {  8,  1,  0 },
yading@10:             {  -8,  1,  0 }, {  2,  2,  0 }, {  -2,  2,  0 }, {  9,  1,  0 }, {  -9,  1,  0 }, {  1,  3,  0 },
yading@10:             {  -1,  3,  0 }, { 10,  1,  1 }, { -10,  1,  1 }, {  3,  2,  0 }, {  -3,  2,  0 }, { 11,  1,  1 },
yading@10:             { -11,  1,  1 }, {  4,  2,  0 }, {  -4,  2,  0 }, { 12,  1,  1 }, { -12,  1,  1 }, {  1,  4,  0 },
yading@10:             {  -1,  4,  0 }, {  2,  3,  0 }, {  -2,  3,  0 }, { 13,  1,  1 }, { -13,  1,  1 }, {  5,  2,  0 },
yading@10:             {  -5,  2,  0 }, { 14,  1,  1 }, { -14,  1,  1 }, {  6,  2,  0 }, {  -6,  2,  0 }, {  1,  5,  0 },
yading@10:             {  -1,  5,  0 }, { 15,  1,  1 }, { -15,  1,  1 }, {  3,  3,  0 }, {  -3,  3,  0 }, { 16,  1,  1 },
yading@10:             { -16,  1,  1 }, {  2,  4,  0 }, {  -2,  4,  0 }, {  7,  2,  0 }, {  -7,  2,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 17, 8, 4, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         9, //inc_limit
yading@10:         5  //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {      EOB    }, {  1,  1,  0 }, {  -1,  1,  0 }, {  2,  1,  0 }, {  -2,  1,  0 }, {   3,  1,  0 },
yading@10:             {  -3,  1,  0 }, {  4,  1,  0 }, {  -4,  1,  0 }, {  5,  1,  0 }, {  -5,  1,  0 }, {   6,  1,  0 },
yading@10:             {  -6,  1,  0 }, {  7,  1,  0 }, {  -7,  1,  0 }, {  1,  2,  0 }, {  -1,  2,  0 }, {   8,  1,  0 },
yading@10:             {  -8,  1,  0 }, {  9,  1,  0 }, {  -9,  1,  0 }, { 10,  1,  0 }, { -10,  1,  0 }, {  11,  1,  0 },
yading@10:             { -11,  1,  0 }, { 12,  1,  0 }, { -12,  1,  0 }, {  2,  2,  0 }, {  -2,  2,  0 }, {  13,  1,  0 },
yading@10:             { -13,  1,  0 }, {  1,  3,  0 }, {  -1,  3,  0 }, { 14,  1,  0 }, { -14,  1,  0 }, {  15,  1,  0 },
yading@10:             { -15,  1,  0 }, {  3,  2,  0 }, {  -3,  2,  0 }, { 16,  1,  0 }, { -16,  1,  0 }, {  17,  1,  0 },
yading@10:             { -17,  1,  0 }, { 18,  1,  0 }, { -18,  1,  0 }, {  4,  2,  0 }, {  -4,  2,  0 }, {  19,  1,  0 },
yading@10:             { -19,  1,  0 }, { 20,  1,  0 }, { -20,  1,  0 }, {  2,  3,  0 }, {  -2,  3,  0 }, {   1,  4,  0 },
yading@10:             {  -1,  4,  0 }, {  5,  2,  0 }, {  -5,  2,  0 }, { 21,  1,  0 }, { -21,  1,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 22, 6, 3, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         2, //golomb_order
yading@10:         INT_MAX, //inc_limit
yading@10:         4 //max_run
yading@10:     }
yading@10: };
yading@10: 
yading@10: static const struct dec_2dvlc chroma_dec[5] = {
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  1 }, { -1,  1,  1 }, {  1,  2,  1 }, { -1,  2,  1 }, {  1,  3,  1 }, { -1,  3,  1 },
yading@10:             {  1,  4,  1 }, { -1,  4,  1 }, {  1,  5,  1 }, { -1,  5,  1 }, {  1,  6,  1 }, { -1,  6,  1 },
yading@10:             {  1,  7,  1 }, { -1,  7,  1 }, {  2,  1,  2 }, { -2,  1,  2 }, {  1,  8,  1 }, { -1,  8,  1 },
yading@10:             {  1,  9,  1 }, { -1,  9,  1 }, {  1, 10,  1 }, { -1, 10,  1 }, {  1, 11,  1 }, { -1, 11,  1 },
yading@10:             {  1, 12,  1 }, { -1, 12,  1 }, {  1, 13,  1 }, { -1, 13,  1 }, {  1, 14,  1 }, { -1, 14,  1 },
yading@10:             {  1, 15,  1 }, { -1, 15,  1 }, {  3,  1,  3 }, { -3,  1,  3 }, {  1, 16,  1 }, { -1, 16,  1 },
yading@10:             {  1, 17,  1 }, { -1, 17,  1 }, {  1, 18,  1 }, { -1, 18,  1 }, {  1, 19,  1 }, { -1, 19,  1 },
yading@10:             {  1, 20,  1 }, { -1, 20,  1 }, {  1, 21,  1 }, { -1, 21,  1 }, {  1, 22,  1 }, { -1, 22,  1 },
yading@10:             {  2,  2,  2 }, { -2,  2,  2 }, {  1, 23,  1 }, { -1, 23,  1 }, {  1, 24,  1 }, { -1, 24,  1 },
yading@10:             {  1, 25,  1 }, { -1, 25,  1 }, {  4,  1,  3 }, { -4,  1,  3 }, {   EOB    }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1 },
yading@10:         2, //golomb_order
yading@10:         0, //inc_limit
yading@10:         25 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  2,  1,  1 },
yading@10:             { -2,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  1,  5,  0 },
yading@10:             { -1,  5,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  3,  1,  2 }, { -3,  1,  2 }, {  1,  7,  0 },
yading@10:             { -1,  7,  0 }, {  1,  8,  0 }, { -1,  8,  0 }, {  2,  2,  1 }, { -2,  2,  1 }, {  1,  9,  0 },
yading@10:             { -1,  9,  0 }, {  1, 10,  0 }, { -1, 10,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  4,  1,  2 },
yading@10:             { -4,  1,  2 }, {  1, 12,  0 }, { -1, 12,  0 }, {  1, 13,  0 }, { -1, 13,  0 }, {  1, 14,  0 },
yading@10:             { -1, 14,  0 }, {  2,  3,  1 }, { -2,  3,  1 }, {  1, 15,  0 }, { -1, 15,  0 }, {  2,  4,  1 },
yading@10:             { -2,  4,  1 }, {  5,  1,  3 }, { -5,  1,  3 }, {  3,  2,  2 }, { -3,  2,  2 }, {  1, 16,  0 },
yading@10:             { -1, 16,  0 }, {  1, 17,  0 }, { -1, 17,  0 }, {  1, 18,  0 }, { -1, 18,  0 }, {  2,  5,  1 },
yading@10:             { -2,  5,  1 }, {  1, 19,  0 }, { -1, 19,  0 }, {  1, 20,  0 }, { -1, 20,  0 }
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1 },
yading@10:         0, //golomb_order
yading@10:         1, //inc_limit
yading@10:         20 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {  1,  1,  0 }, { -1,  1,  0 }, {     EOB    }, {  2,  1,  0 }, { -2,  1,  0 }, {  1,  2,  0 },
yading@10:             { -1,  2,  0 }, {  3,  1,  1 }, { -3,  1,  1 }, {  1,  3,  0 }, { -1,  3,  0 }, {  4,  1,  1 },
yading@10:             { -4,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  1,  4,  0 }, { -1,  4,  0 }, {  5,  1,  2 },
yading@10:             { -5,  1,  2 }, {  1,  5,  0 }, { -1,  5,  0 }, {  3,  2,  1 }, { -3,  2,  1 }, {  2,  3,  0 },
yading@10:             { -2,  3,  0 }, {  1,  6,  0 }, { -1,  6,  0 }, {  6,  1,  2 }, { -6,  1,  2 }, {  1,  7,  0 },
yading@10:             { -1,  7,  0 }, {  2,  4,  0 }, { -2,  4,  0 }, {  7,  1,  2 }, { -7,  1,  2 }, {  1,  8,  0 },
yading@10:             { -1,  8,  0 }, {  4,  2,  1 }, { -4,  2,  1 }, {  1,  9,  0 }, { -1,  9,  0 }, {  3,  3,  1 },
yading@10:             { -3,  3,  1 }, {  2,  5,  0 }, { -2,  5,  0 }, {  2,  6,  0 }, { -2,  6,  0 }, {  8,  1,  2 },
yading@10:             { -8,  1,  2 }, {  1, 10,  0 }, { -1, 10,  0 }, {  1, 11,  0 }, { -1, 11,  0 }, {  9,  1,  2 },
yading@10:             { -9,  1,  2 }, {  5,  2,  2 }, { -5,  2,  2 }, {  3,  4,  1 }, { -3,  4,  1 },
yading@10:         },
yading@10:         //level_add
yading@10:         { 0,10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         1, //golomb_order
yading@10:         2, //inc_limit
yading@10:         11 //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {     EOB    }, {  1,  1,  0 }, { -1,  1,  0 }, {  2,  1,  0 }, { -2,  1,  0 }, {  3,  1,  0 },
yading@10:             { -3,  1,  0 }, {  4,  1,  0 }, { -4,  1,  0 }, {  1,  2,  0 }, { -1,  2,  0 }, {  5,  1,  1 },
yading@10:             { -5,  1,  1 }, {  2,  2,  0 }, { -2,  2,  0 }, {  6,  1,  1 }, { -6,  1,  1 }, {  1,  3,  0 },
yading@10:             { -1,  3,  0 }, {  7,  1,  1 }, { -7,  1,  1 }, {  3,  2,  0 }, { -3,  2,  0 }, {  8,  1,  1 },
yading@10:             { -8,  1,  1 }, {  1,  4,  0 }, { -1,  4,  0 }, {  2,  3,  0 }, { -2,  3,  0 }, {  9,  1,  1 },
yading@10:             { -9,  1,  1 }, {  4,  2,  0 }, { -4,  2,  0 }, {  1,  5,  0 }, { -1,  5,  0 }, { 10,  1,  1 },
yading@10:             {-10,  1,  1 }, {  3,  3,  0 }, { -3,  3,  0 }, {  5,  2,  1 }, { -5,  2,  1 }, {  2,  4,  0 },
yading@10:             { -2,  4,  0 }, { 11,  1,  1 }, {-11,  1,  1 }, {  1,  6,  0 }, { -1,  6,  0 }, { 12,  1,  1 },
yading@10:             {-12,  1,  1 }, {  1,  7,  0 }, { -1,  7,  0 }, {  6,  2,  1 }, { -6,  2,  1 }, { 13,  1,  1 },
yading@10:             {-13,  1,  1 }, {  2,  5,  0 }, { -2,  5,  0 }, {  1,  8,  0 }, { -1,  8,  0 },
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 14, 7, 4, 3, 3, 2, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         1, //golomb_order
yading@10:         4, //inc_limit
yading@10:         8  //max_run
yading@10:     },
yading@10:     {
yading@10:         { //level / run
yading@10:             {      EOB    }, {  1,  1,  0 }, {  -1,  1,  0 }, {  2,  1,  0 }, {  -2,  1,  0 }, {  3,  1,  0 },
yading@10:             {  -3,  1,  0 }, {  4,  1,  0 }, {  -4,  1,  0 }, {  5,  1,  0 }, {  -5,  1,  0 }, {  6,  1,  0 },
yading@10:             {  -6,  1,  0 }, {  7,  1,  0 }, {  -7,  1,  0 }, {  8,  1,  0 }, {  -8,  1,  0 }, {  1,  2,  0 },
yading@10:             {  -1,  2,  0 }, {  9,  1,  0 }, {  -9,  1,  0 }, { 10,  1,  0 }, { -10,  1,  0 }, { 11,  1,  0 },
yading@10:             { -11,  1,  0 }, {  2,  2,  0 }, {  -2,  2,  0 }, { 12,  1,  0 }, { -12,  1,  0 }, { 13,  1,  0 },
yading@10:             { -13,  1,  0 }, {  3,  2,  0 }, {  -3,  2,  0 }, { 14,  1,  0 }, { -14,  1,  0 }, {  1,  3,  0 },
yading@10:             {  -1,  3,  0 }, { 15,  1,  0 }, { -15,  1,  0 }, {  4,  2,  0 }, {  -4,  2,  0 }, { 16,  1,  0 },
yading@10:             { -16,  1,  0 }, { 17,  1,  0 }, { -17,  1,  0 }, {  5,  2,  0 }, {  -5,  2,  0 }, {  1,  4,  0 },
yading@10:             {  -1,  4,  0 }, {  2,  3,  0 }, {  -2,  3,  0 }, { 18,  1,  0 }, { -18,  1,  0 }, {  6,  2,  0 },
yading@10:             {  -6,  2,  0 }, { 19,  1,  0 }, { -19,  1,  0 }, {  1,  5,  0 }, {  -1,  5,  0 },
yading@10:         },
yading@10:         //level_add
yading@10:         { 0, 20, 7, 3, 2, 2, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 },
yading@10:         0, //golomb_order
yading@10:         INT_MAX, //inc_limit
yading@10:         5, //max_run
yading@10:     }
yading@10: };
yading@10: 
yading@10: #undef EOB
yading@10: 
yading@10: /*****************************************************************************
yading@10:  *
yading@10:  * motion vector prediction
yading@10:  *
yading@10:  ****************************************************************************/
yading@10: 
yading@10: static inline void store_mvs(AVSContext *h)
yading@10: {
yading@10:     h->col_mv[h->mbidx * 4 + 0] = h->mv[MV_FWD_X0];
yading@10:     h->col_mv[h->mbidx * 4 + 1] = h->mv[MV_FWD_X1];
yading@10:     h->col_mv[h->mbidx * 4 + 2] = h->mv[MV_FWD_X2];
yading@10:     h->col_mv[h->mbidx * 4 + 3] = h->mv[MV_FWD_X3];
yading@10: }
yading@10: 
yading@10: static inline void mv_pred_direct(AVSContext *h, cavs_vector *pmv_fw,
yading@10:                                   cavs_vector *col_mv)
yading@10: {
yading@10:     cavs_vector *pmv_bw = pmv_fw + MV_BWD_OFFS;
yading@10:     int den = h->direct_den[col_mv->ref];
yading@10:     int m = col_mv->x >> 31;
yading@10: 
yading@10:     pmv_fw->dist = h->dist[1];
yading@10:     pmv_bw->dist = h->dist[0];
yading@10:     pmv_fw->ref = 1;
yading@10:     pmv_bw->ref = 0;
yading@10:     /* scale the co-located motion vector according to its temporal span */
yading@10:     pmv_fw->x =     (((den + (den * col_mv->x * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
yading@10:     pmv_bw->x = m - (((den + (den * col_mv->x * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
yading@10:     m = col_mv->y >> 31;
yading@10:     pmv_fw->y =     (((den + (den * col_mv->y * pmv_fw->dist ^ m) - m - 1) >> 14) ^ m) - m;
yading@10:     pmv_bw->y = m - (((den + (den * col_mv->y * pmv_bw->dist ^ m) - m - 1) >> 14) ^ m);
yading@10: }
yading@10: 
yading@10: static inline void mv_pred_sym(AVSContext *h, cavs_vector *src,
yading@10:                                enum cavs_block size)
yading@10: {
yading@10:     cavs_vector *dst = src + MV_BWD_OFFS;
yading@10: 
yading@10:     /* backward mv is the scaled and negated forward mv */
yading@10:     dst->x = -((src->x * h->sym_factor + 256) >> 9);
yading@10:     dst->y = -((src->y * h->sym_factor + 256) >> 9);
yading@10:     dst->ref = 0;
yading@10:     dst->dist = h->dist[0];
yading@10:     set_mvs(dst, size);
yading@10: }
yading@10: 
yading@10: /*****************************************************************************
yading@10:  *
yading@10:  * residual data decoding
yading@10:  *
yading@10:  ****************************************************************************/
yading@10: 
yading@10: /** kth-order exponential golomb code */
yading@10: static inline int get_ue_code(GetBitContext *gb, int order)
yading@10: {
yading@10:     unsigned ret = get_ue_golomb(gb);
yading@10:     if (ret >= ((1U<<31)>>order)) {
yading@10:         av_log(NULL, AV_LOG_ERROR, "get_ue_code: value too larger\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     if (order) {
yading@10:         return (ret<<order) + get_bits(gb, order);
yading@10:     }
yading@10:     return ret;
yading@10: }
yading@10: 
yading@10: static inline int dequant(AVSContext *h, int16_t *level_buf, uint8_t *run_buf,
yading@10:                           int16_t *dst, int mul, int shift, int coeff_num)
yading@10: {
yading@10:     int round = 1 << (shift - 1);
yading@10:     int pos = -1;
yading@10:     const uint8_t *scantab = h->scantable.permutated;
yading@10: 
yading@10:     /* inverse scan and dequantization */
yading@10:     while (--coeff_num >= 0) {
yading@10:         pos += run_buf[coeff_num];
yading@10:         if (pos > 63) {
yading@10:             av_log(h->avctx, AV_LOG_ERROR,
yading@10:                    "position out of block bounds at pic %d MB(%d,%d)\n",
yading@10:                    h->cur.poc, h->mbx, h->mby);
yading@10:             return -1;
yading@10:         }
yading@10:         dst[scantab[pos]] = (level_buf[coeff_num] * mul + round) >> shift;
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /**
yading@10:  * decode coefficients from one 8x8 block, dequantize, inverse transform
yading@10:  *  and add them to sample block
yading@10:  * @param r pointer to 2D VLC table
yading@10:  * @param esc_golomb_order escape codes are k-golomb with this order k
yading@10:  * @param qp quantizer
yading@10:  * @param dst location of sample block
yading@10:  * @param stride line stride in frame buffer
yading@10:  */
yading@10: static int decode_residual_block(AVSContext *h, GetBitContext *gb,
yading@10:                                  const struct dec_2dvlc *r, int esc_golomb_order,
yading@10:                                  int qp, uint8_t *dst, int stride)
yading@10: {
yading@10:     int i, esc_code, level, mask;
yading@10:     unsigned int level_code, run;
yading@10:     int16_t level_buf[65];
yading@10:     uint8_t run_buf[65];
yading@10:     int16_t *block = h->block;
yading@10: 
yading@10:     for (i = 0; i < 65; i++) {
yading@10:         level_code = get_ue_code(gb, r->golomb_order);
yading@10:         if (level_code >= ESCAPE_CODE) {
yading@10:             run      = ((level_code - ESCAPE_CODE) >> 1) + 1;
yading@10:             if(run > 64)
yading@10:                 return -1;
yading@10:             esc_code = get_ue_code(gb, esc_golomb_order);
yading@10:             level    = esc_code + (run > r->max_run ? 1 : r->level_add[run]);
yading@10:             while (level > r->inc_limit)
yading@10:                 r++;
yading@10:             mask  = -(level_code & 1);
yading@10:             level = (level ^ mask) - mask;
yading@10:         } else {
yading@10:             level = r->rltab[level_code][0];
yading@10:             if (!level) //end of block signal
yading@10:                 break;
yading@10:             run = r->rltab[level_code][1];
yading@10:             r  += r->rltab[level_code][2];
yading@10:         }
yading@10:         level_buf[i] = level;
yading@10:         run_buf[i]   = run;
yading@10:     }
yading@10:     if (dequant(h, level_buf, run_buf, block, dequant_mul[qp],
yading@10:                 dequant_shift[qp], i))
yading@10:         return -1;
yading@10:     h->cdsp.cavs_idct8_add(dst, block, stride);
yading@10:     h->dsp.clear_block(block);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: 
yading@10: static inline void decode_residual_chroma(AVSContext *h)
yading@10: {
yading@10:     if (h->cbp & (1 << 4))
yading@10:         decode_residual_block(h, &h->gb, chroma_dec, 0,
yading@10:                               cavs_chroma_qp[h->qp], h->cu, h->c_stride);
yading@10:     if (h->cbp & (1 << 5))
yading@10:         decode_residual_block(h, &h->gb, chroma_dec, 0,
yading@10:                               cavs_chroma_qp[h->qp], h->cv, h->c_stride);
yading@10: }
yading@10: 
yading@10: static inline int decode_residual_inter(AVSContext *h)
yading@10: {
yading@10:     int block;
yading@10: 
yading@10:     /* get coded block pattern */
yading@10:     int cbp = get_ue_golomb(&h->gb);
yading@10:     if (cbp > 63U) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "illegal inter cbp\n");
yading@10:         return -1;
yading@10:     }
yading@10:     h->cbp = cbp_tab[cbp][1];
yading@10: 
yading@10:     /* get quantizer */
yading@10:     if (h->cbp && !h->qp_fixed)
yading@10:         h->qp = (h->qp + get_se_golomb(&h->gb)) & 63;
yading@10:     for (block = 0; block < 4; block++)
yading@10:         if (h->cbp & (1 << block))
yading@10:             decode_residual_block(h, &h->gb, inter_dec, 0, h->qp,
yading@10:                                   h->cy + h->luma_scan[block], h->l_stride);
yading@10:     decode_residual_chroma(h);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /*****************************************************************************
yading@10:  *
yading@10:  * macroblock level
yading@10:  *
yading@10:  ****************************************************************************/
yading@10: 
yading@10: static inline void set_mv_intra(AVSContext *h)
yading@10: {
yading@10:     h->mv[MV_FWD_X0] = ff_cavs_intra_mv;
yading@10:     set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
yading@10:     h->mv[MV_BWD_X0] = ff_cavs_intra_mv;
yading@10:     set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
yading@10:     if (h->cur.f->pict_type != AV_PICTURE_TYPE_B)
yading@10:         h->col_type_base[h->mbidx] = I_8X8;
yading@10: }
yading@10: 
yading@10: static int decode_mb_i(AVSContext *h, int cbp_code)
yading@10: {
yading@10:     GetBitContext *gb = &h->gb;
yading@10:     unsigned pred_mode_uv;
yading@10:     int block;
yading@10:     uint8_t top[18];
yading@10:     uint8_t *left = NULL;
yading@10:     uint8_t *d;
yading@10: 
yading@10:     ff_cavs_init_mb(h);
yading@10: 
yading@10:     /* get intra prediction modes from stream */
yading@10:     for (block = 0; block < 4; block++) {
yading@10:         int nA, nB, predpred;
yading@10:         int pos = scan3x3[block];
yading@10: 
yading@10:         nA = h->pred_mode_Y[pos - 1];
yading@10:         nB = h->pred_mode_Y[pos - 3];
yading@10:         predpred = FFMIN(nA, nB);
yading@10:         if (predpred == NOT_AVAIL) // if either is not available
yading@10:             predpred = INTRA_L_LP;
yading@10:         if (!get_bits1(gb)) {
yading@10:             int rem_mode = get_bits(gb, 2);
yading@10:             predpred     = rem_mode + (rem_mode >= predpred);
yading@10:         }
yading@10:         h->pred_mode_Y[pos] = predpred;
yading@10:     }
yading@10:     pred_mode_uv = get_ue_golomb(gb);
yading@10:     if (pred_mode_uv > 6) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "illegal intra chroma pred mode\n");
yading@10:         return -1;
yading@10:     }
yading@10:     ff_cavs_modify_mb_i(h, &pred_mode_uv);
yading@10: 
yading@10:     /* get coded block pattern */
yading@10:     if (h->cur.f->pict_type == AV_PICTURE_TYPE_I)
yading@10:         cbp_code = get_ue_golomb(gb);
yading@10:     if (cbp_code > 63U) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "illegal intra cbp\n");
yading@10:         return -1;
yading@10:     }
yading@10:     h->cbp = cbp_tab[cbp_code][0];
yading@10:     if (h->cbp && !h->qp_fixed)
yading@10:         h->qp = (h->qp + get_se_golomb(gb)) & 63; //qp_delta
yading@10: 
yading@10:     /* luma intra prediction interleaved with residual decode/transform/add */
yading@10:     for (block = 0; block < 4; block++) {
yading@10:         d = h->cy + h->luma_scan[block];
yading@10:         ff_cavs_load_intra_pred_luma(h, top, &left, block);
yading@10:         h->intra_pred_l[h->pred_mode_Y[scan3x3[block]]]
yading@10:             (d, top, left, h->l_stride);
yading@10:         if (h->cbp & (1<<block))
yading@10:             decode_residual_block(h, gb, intra_dec, 1, h->qp, d, h->l_stride);
yading@10:     }
yading@10: 
yading@10:     /* chroma intra prediction */
yading@10:     ff_cavs_load_intra_pred_chroma(h);
yading@10:     h->intra_pred_c[pred_mode_uv](h->cu, &h->top_border_u[h->mbx * 10],
yading@10:                                   h->left_border_u, h->c_stride);
yading@10:     h->intra_pred_c[pred_mode_uv](h->cv, &h->top_border_v[h->mbx * 10],
yading@10:                                   h->left_border_v, h->c_stride);
yading@10: 
yading@10:     decode_residual_chroma(h);
yading@10:     ff_cavs_filter(h, I_8X8);
yading@10:     set_mv_intra(h);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static inline void set_intra_mode_default(AVSContext *h)
yading@10: {
yading@10:     if (h->stream_revision > 0) {
yading@10:         h->pred_mode_Y[3] =  h->pred_mode_Y[6] = NOT_AVAIL;
yading@10:         h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = NOT_AVAIL;
yading@10:     } else {
yading@10:         h->pred_mode_Y[3] =  h->pred_mode_Y[6] = INTRA_L_LP;
yading@10:         h->top_pred_Y[h->mbx * 2 + 0] = h->top_pred_Y[h->mbx * 2 + 1] = INTRA_L_LP;
yading@10:     }
yading@10: }
yading@10: 
yading@10: static void decode_mb_p(AVSContext *h, enum cavs_mb mb_type)
yading@10: {
yading@10:     GetBitContext *gb = &h->gb;
yading@10:     int ref[4];
yading@10: 
yading@10:     ff_cavs_init_mb(h);
yading@10:     switch (mb_type) {
yading@10:     case P_SKIP:
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP,  BLK_16X16, 0);
yading@10:         break;
yading@10:     case P_16X16:
yading@10:         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, ref[0]);
yading@10:         break;
yading@10:     case P_16X8:
yading@10:         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ref[2] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,    BLK_16X8, ref[0]);
yading@10:         ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT,   BLK_16X8, ref[2]);
yading@10:         break;
yading@10:     case P_8X16:
yading@10:         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ref[1] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT,     BLK_8X16, ref[0]);
yading@10:         ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, ref[1]);
yading@10:         break;
yading@10:     case P_8X8:
yading@10:         ref[0] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ref[1] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ref[2] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ref[3] = h->ref_flag ? 0 : get_bits1(gb);
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_MEDIAN,   BLK_8X8, ref[0]);
yading@10:         ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_MEDIAN,   BLK_8X8, ref[1]);
yading@10:         ff_cavs_mv(h, MV_FWD_X2, MV_FWD_X1, MV_PRED_MEDIAN,   BLK_8X8, ref[2]);
yading@10:         ff_cavs_mv(h, MV_FWD_X3, MV_FWD_X0, MV_PRED_MEDIAN,   BLK_8X8, ref[3]);
yading@10:     }
yading@10:     ff_cavs_inter(h, mb_type);
yading@10:     set_intra_mode_default(h);
yading@10:     store_mvs(h);
yading@10:     if (mb_type != P_SKIP)
yading@10:         decode_residual_inter(h);
yading@10:     ff_cavs_filter(h, mb_type);
yading@10:     h->col_type_base[h->mbidx] = mb_type;
yading@10: }
yading@10: 
yading@10: static int decode_mb_b(AVSContext *h, enum cavs_mb mb_type)
yading@10: {
yading@10:     int block;
yading@10:     enum cavs_sub_mb sub_type[4];
yading@10:     int flags;
yading@10: 
yading@10:     ff_cavs_init_mb(h);
yading@10: 
yading@10:     /* reset all MVs */
yading@10:     h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
yading@10:     set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
yading@10:     h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
yading@10:     set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
yading@10:     switch (mb_type) {
yading@10:     case B_SKIP:
yading@10:     case B_DIRECT:
yading@10:         if (!h->col_type_base[h->mbidx]) {
yading@10:             /* intra MB at co-location, do in-plane prediction */
yading@10:             ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1);
yading@10:             ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0);
yading@10:         } else
yading@10:             /* direct prediction from co-located P MB, block-wise */
yading@10:             for (block = 0; block < 4; block++)
yading@10:                 mv_pred_direct(h, &h->mv[mv_scan[block]],
yading@10:                                &h->col_mv[h->mbidx * 4 + block]);
yading@10:         break;
yading@10:     case B_FWD_16X16:
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
yading@10:         break;
yading@10:     case B_SYM_16X16:
yading@10:         ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1);
yading@10:         mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X16);
yading@10:         break;
yading@10:     case B_BWD_16X16:
yading@10:         ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_MEDIAN, BLK_16X16, 0);
yading@10:         break;
yading@10:     case B_8X8:
yading@10:         for (block = 0; block < 4; block++)
yading@10:             sub_type[block] = get_bits(&h->gb, 2);
yading@10:         for (block = 0; block < 4; block++) {
yading@10:             switch (sub_type[block]) {
yading@10:             case B_SUB_DIRECT:
yading@10:                 if (!h->col_type_base[h->mbidx]) {
yading@10:                     /* intra MB at co-location, do in-plane prediction */
yading@10:                     ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
yading@10:                                MV_PRED_BSKIP, BLK_8X8, 1);
yading@10:                     ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
yading@10:                                mv_scan[block] - 3 + MV_BWD_OFFS,
yading@10:                                MV_PRED_BSKIP, BLK_8X8, 0);
yading@10:                 } else
yading@10:                     mv_pred_direct(h, &h->mv[mv_scan[block]],
yading@10:                                    &h->col_mv[h->mbidx * 4 + block]);
yading@10:                 break;
yading@10:             case B_SUB_FWD:
yading@10:                 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
yading@10:                            MV_PRED_MEDIAN, BLK_8X8, 1);
yading@10:                 break;
yading@10:             case B_SUB_SYM:
yading@10:                 ff_cavs_mv(h, mv_scan[block], mv_scan[block] - 3,
yading@10:                            MV_PRED_MEDIAN, BLK_8X8, 1);
yading@10:                 mv_pred_sym(h, &h->mv[mv_scan[block]], BLK_8X8);
yading@10:                 break;
yading@10:             }
yading@10:         }
yading@10:         for (block = 0; block < 4; block++) {
yading@10:             if (sub_type[block] == B_SUB_BWD)
yading@10:                 ff_cavs_mv(h, mv_scan[block] + MV_BWD_OFFS,
yading@10:                            mv_scan[block] + MV_BWD_OFFS - 3,
yading@10:                            MV_PRED_MEDIAN, BLK_8X8, 0);
yading@10:         }
yading@10:         break;
yading@10:     default:
yading@10:         if (mb_type <= B_SYM_16X16) {
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "Invalid mb_type %d in B frame\n", mb_type);
yading@10:             return AVERROR_INVALIDDATA;
yading@10:         }
yading@10:         av_assert2(mb_type < B_8X8);
yading@10:         flags = ff_cavs_partition_flags[mb_type];
yading@10:         if (mb_type & 1) { /* 16x8 macroblock types */
yading@10:             if (flags & FWD0)
yading@10:                 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_TOP,  BLK_16X8, 1);
yading@10:             if (flags & SYM0)
yading@10:                 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_16X8);
yading@10:             if (flags & FWD1)
yading@10:                 ff_cavs_mv(h, MV_FWD_X2, MV_FWD_A1, MV_PRED_LEFT, BLK_16X8, 1);
yading@10:             if (flags & SYM1)
yading@10:                 mv_pred_sym(h, &h->mv[MV_FWD_X2], BLK_16X8);
yading@10:             if (flags & BWD0)
yading@10:                 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_TOP,  BLK_16X8, 0);
yading@10:             if (flags & BWD1)
yading@10:                 ff_cavs_mv(h, MV_BWD_X2, MV_BWD_A1, MV_PRED_LEFT, BLK_16X8, 0);
yading@10:         } else {          /* 8x16 macroblock types */
yading@10:             if (flags & FWD0)
yading@10:                 ff_cavs_mv(h, MV_FWD_X0, MV_FWD_B3, MV_PRED_LEFT, BLK_8X16, 1);
yading@10:             if (flags & SYM0)
yading@10:                 mv_pred_sym(h, &h->mv[MV_FWD_X0], BLK_8X16);
yading@10:             if (flags & FWD1)
yading@10:                 ff_cavs_mv(h, MV_FWD_X1, MV_FWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 1);
yading@10:             if (flags & SYM1)
yading@10:                 mv_pred_sym(h, &h->mv[MV_FWD_X1], BLK_8X16);
yading@10:             if (flags & BWD0)
yading@10:                 ff_cavs_mv(h, MV_BWD_X0, MV_BWD_B3, MV_PRED_LEFT, BLK_8X16, 0);
yading@10:             if (flags & BWD1)
yading@10:                 ff_cavs_mv(h, MV_BWD_X1, MV_BWD_C2, MV_PRED_TOPRIGHT, BLK_8X16, 0);
yading@10:         }
yading@10:     }
yading@10:     ff_cavs_inter(h, mb_type);
yading@10:     set_intra_mode_default(h);
yading@10:     if (mb_type != B_SKIP)
yading@10:         decode_residual_inter(h);
yading@10:     ff_cavs_filter(h, mb_type);
yading@10: 
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /*****************************************************************************
yading@10:  *
yading@10:  * slice level
yading@10:  *
yading@10:  ****************************************************************************/
yading@10: 
yading@10: static inline int decode_slice_header(AVSContext *h, GetBitContext *gb)
yading@10: {
yading@10:     if (h->stc > 0xAF)
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "unexpected start code 0x%02x\n", h->stc);
yading@10: 
yading@10:     if (h->stc >= h->mb_height)
yading@10:         return -1;
yading@10: 
yading@10:     h->mby   = h->stc;
yading@10:     h->mbidx = h->mby * h->mb_width;
yading@10: 
yading@10:     /* mark top macroblocks as unavailable */
yading@10:     h->flags &= ~(B_AVAIL | C_AVAIL);
yading@10:     if ((h->mby == 0) && (!h->qp_fixed)) {
yading@10:         h->qp_fixed = get_bits1(gb);
yading@10:         h->qp       = get_bits(gb, 6);
yading@10:     }
yading@10:     /* inter frame or second slice can have weighting params */
yading@10:     if ((h->cur.f->pict_type != AV_PICTURE_TYPE_I) ||
yading@10:         (!h->pic_structure && h->mby >= h->mb_width / 2))
yading@10:         if (get_bits1(gb)) { //slice_weighting_flag
yading@10:             av_log(h->avctx, AV_LOG_ERROR,
yading@10:                    "weighted prediction not yet supported\n");
yading@10:         }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static inline int check_for_slice(AVSContext *h)
yading@10: {
yading@10:     GetBitContext *gb = &h->gb;
yading@10:     int align;
yading@10: 
yading@10:     if (h->mbx)
yading@10:         return 0;
yading@10:     align = (-get_bits_count(gb)) & 7;
yading@10:     /* check for stuffing byte */
yading@10:     if (!align && (show_bits(gb, 8) == 0x80))
yading@10:         align = 8;
yading@10:     if ((show_bits_long(gb, 24 + align) & 0xFFFFFF) == 0x000001) {
yading@10:         skip_bits_long(gb, 24 + align);
yading@10:         h->stc = get_bits(gb, 8);
yading@10:         if (h->stc >= h->mb_height)
yading@10:             return 0;
yading@10:         decode_slice_header(h, gb);
yading@10:         return 1;
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /*****************************************************************************
yading@10:  *
yading@10:  * frame level
yading@10:  *
yading@10:  ****************************************************************************/
yading@10: 
yading@10: static int decode_pic(AVSContext *h)
yading@10: {
yading@10:     int skip_count    = -1;
yading@10:     int ret;
yading@10:     enum cavs_mb mb_type;
yading@10: 
yading@10:     av_frame_unref(h->cur.f);
yading@10: 
yading@10:     skip_bits(&h->gb, 16);//bbv_dwlay
yading@10:     if (h->stc == PIC_PB_START_CODE) {
yading@10:         h->cur.f->pict_type = get_bits(&h->gb, 2) + AV_PICTURE_TYPE_I;
yading@10:         if (h->cur.f->pict_type > AV_PICTURE_TYPE_B) {
yading@10:             av_log(h->avctx, AV_LOG_ERROR, "illegal picture type\n");
yading@10:             return -1;
yading@10:         }
yading@10:         /* make sure we have the reference frames we need */
yading@10:         if (!h->DPB[0].f->data[0] ||
yading@10:            (!h->DPB[1].f->data[0] && h->cur.f->pict_type == AV_PICTURE_TYPE_B))
yading@10:             return -1;
yading@10:     } else {
yading@10:         h->cur.f->pict_type = AV_PICTURE_TYPE_I;
yading@10:         if (get_bits1(&h->gb))
yading@10:             skip_bits(&h->gb, 24);//time_code
yading@10:         /* old sample clips were all progressive and no low_delay,
yading@10:            bump stream revision if detected otherwise */
yading@10:         if (h->low_delay || !(show_bits(&h->gb, 9) & 1))
yading@10:             h->stream_revision = 1;
yading@10:         /* similarly test top_field_first and repeat_first_field */
yading@10:         else if (show_bits(&h->gb, 11) & 3)
yading@10:             h->stream_revision = 1;
yading@10:         if (h->stream_revision > 0)
yading@10:             skip_bits(&h->gb, 1); //marker_bit
yading@10:     }
yading@10: 
yading@10:     if ((ret = ff_get_buffer(h->avctx, h->cur.f,
yading@10:                              h->cur.f->pict_type == AV_PICTURE_TYPE_B ?
yading@10:                              0 : AV_GET_BUFFER_FLAG_REF)) < 0)
yading@10:         return ret;
yading@10: 
yading@10:     if (!h->edge_emu_buffer) {
yading@10:         int alloc_size = FFALIGN(FFABS(h->cur.f->linesize[0]) + 32, 32);
yading@10:         h->edge_emu_buffer = av_mallocz(alloc_size * 2 * 24);
yading@10:         if (!h->edge_emu_buffer)
yading@10:             return AVERROR(ENOMEM);
yading@10:     }
yading@10: 
yading@10:     if ((ret = ff_cavs_init_pic(h)) < 0)
yading@10:         return ret;
yading@10:     h->cur.poc = get_bits(&h->gb, 8) * 2;
yading@10: 
yading@10:     /* get temporal distances and MV scaling factors */
yading@10:     if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
yading@10:         h->dist[0] = (h->cur.poc - h->DPB[0].poc  + 512) % 512;
yading@10:     } else {
yading@10:         h->dist[0] = (h->DPB[0].poc  - h->cur.poc + 512) % 512;
yading@10:     }
yading@10:     h->dist[1] = (h->cur.poc - h->DPB[1].poc  + 512) % 512;
yading@10:     h->scale_den[0] = h->dist[0] ? 512/h->dist[0] : 0;
yading@10:     h->scale_den[1] = h->dist[1] ? 512/h->dist[1] : 0;
yading@10:     if (h->cur.f->pict_type == AV_PICTURE_TYPE_B) {
yading@10:         h->sym_factor = h->dist[0] * h->scale_den[1];
yading@10:     } else {
yading@10:         h->direct_den[0] = h->dist[0] ? 16384 / h->dist[0] : 0;
yading@10:         h->direct_den[1] = h->dist[1] ? 16384 / h->dist[1] : 0;
yading@10:     }
yading@10: 
yading@10:     if (h->low_delay)
yading@10:         get_ue_golomb(&h->gb); //bbv_check_times
yading@10:     h->progressive   = get_bits1(&h->gb);
yading@10:     h->pic_structure = 1;
yading@10:     if (!h->progressive)
yading@10:         h->pic_structure = get_bits1(&h->gb);
yading@10:     if (!h->pic_structure && h->stc == PIC_PB_START_CODE)
yading@10:         skip_bits1(&h->gb);     //advanced_pred_mode_disable
yading@10:     skip_bits1(&h->gb);        //top_field_first
yading@10:     skip_bits1(&h->gb);        //repeat_first_field
yading@10:     h->qp_fixed = get_bits1(&h->gb);
yading@10:     h->qp       = get_bits(&h->gb, 6);
yading@10:     if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
yading@10:         if (!h->progressive && !h->pic_structure)
yading@10:             skip_bits1(&h->gb);//what is this?
yading@10:         skip_bits(&h->gb, 4);   //reserved bits
yading@10:     } else {
yading@10:         if (!(h->cur.f->pict_type == AV_PICTURE_TYPE_B && h->pic_structure == 1))
yading@10:             h->ref_flag        = get_bits1(&h->gb);
yading@10:         skip_bits(&h->gb, 4);   //reserved bits
yading@10:         h->skip_mode_flag      = get_bits1(&h->gb);
yading@10:     }
yading@10:     h->loop_filter_disable     = get_bits1(&h->gb);
yading@10:     if (!h->loop_filter_disable && get_bits1(&h->gb)) {
yading@10:         h->alpha_offset        = get_se_golomb(&h->gb);
yading@10:         h->beta_offset         = get_se_golomb(&h->gb);
yading@10:     } else {
yading@10:         h->alpha_offset = h->beta_offset  = 0;
yading@10:     }
yading@10:     if (h->cur.f->pict_type == AV_PICTURE_TYPE_I) {
yading@10:         do {
yading@10:             check_for_slice(h);
yading@10:             decode_mb_i(h, 0);
yading@10:         } while (ff_cavs_next_mb(h));
yading@10:     } else if (h->cur.f->pict_type == AV_PICTURE_TYPE_P) {
yading@10:         do {
yading@10:             if (check_for_slice(h))
yading@10:                 skip_count = -1;
yading@10:             if (h->skip_mode_flag && (skip_count < 0))
yading@10:                 skip_count = get_ue_golomb(&h->gb);
yading@10:             if (h->skip_mode_flag && skip_count--) {
yading@10:                 decode_mb_p(h, P_SKIP);
yading@10:             } else {
yading@10:                 mb_type = get_ue_golomb(&h->gb) + P_SKIP + h->skip_mode_flag;
yading@10:                 if (mb_type > P_8X8)
yading@10:                     decode_mb_i(h, mb_type - P_8X8 - 1);
yading@10:                 else
yading@10:                     decode_mb_p(h, mb_type);
yading@10:             }
yading@10:         } while (ff_cavs_next_mb(h));
yading@10:     } else { /* AV_PICTURE_TYPE_B */
yading@10:         do {
yading@10:             if (check_for_slice(h))
yading@10:                 skip_count = -1;
yading@10:             if (h->skip_mode_flag && (skip_count < 0))
yading@10:                 skip_count = get_ue_golomb(&h->gb);
yading@10:             if (h->skip_mode_flag && skip_count--) {
yading@10:                 decode_mb_b(h, B_SKIP);
yading@10:             } else {
yading@10:                 mb_type = get_ue_golomb(&h->gb) + B_SKIP + h->skip_mode_flag;
yading@10:                 if (mb_type > B_8X8)
yading@10:                     decode_mb_i(h, mb_type - B_8X8 - 1);
yading@10:                 else
yading@10:                     decode_mb_b(h, mb_type);
yading@10:             }
yading@10:         } while (ff_cavs_next_mb(h));
yading@10:     }
yading@10:     if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
yading@10:         av_frame_unref(h->DPB[1].f);
yading@10:         FFSWAP(AVSFrame, h->cur, h->DPB[1]);
yading@10:         FFSWAP(AVSFrame, h->DPB[0], h->DPB[1]);
yading@10:     }
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: /*****************************************************************************
yading@10:  *
yading@10:  * headers and interface
yading@10:  *
yading@10:  ****************************************************************************/
yading@10: 
yading@10: static int decode_seq_header(AVSContext *h)
yading@10: {
yading@10:     int frame_rate_code;
yading@10:     int width, height;
yading@10: 
yading@10:     h->profile = get_bits(&h->gb, 8);
yading@10:     h->level   = get_bits(&h->gb, 8);
yading@10:     skip_bits1(&h->gb); //progressive sequence
yading@10: 
yading@10:     width  = get_bits(&h->gb, 14);
yading@10:     height = get_bits(&h->gb, 14);
yading@10:     if ((h->width || h->height) && (h->width != width || h->height != height)) {
yading@10:         avpriv_report_missing_feature(h->avctx,
yading@10:                                       "Width/height changing in CAVS");
yading@10:         return AVERROR_PATCHWELCOME;
yading@10:     }
yading@10:     if (width <= 0 || height <= 0) {
yading@10:         av_log(h->avctx, AV_LOG_ERROR, "Dimensions invalid\n");
yading@10:         return AVERROR_INVALIDDATA;
yading@10:     }
yading@10:     h->width  = width;
yading@10:     h->height = height;
yading@10: 
yading@10:     skip_bits(&h->gb, 2); //chroma format
yading@10:     skip_bits(&h->gb, 3); //sample_precision
yading@10:     h->aspect_ratio = get_bits(&h->gb, 4);
yading@10:     frame_rate_code = get_bits(&h->gb, 4);
yading@10:     skip_bits(&h->gb, 18); //bit_rate_lower
yading@10:     skip_bits1(&h->gb);    //marker_bit
yading@10:     skip_bits(&h->gb, 12); //bit_rate_upper
yading@10:     h->low_delay =  get_bits1(&h->gb);
yading@10:     h->mb_width  = (h->width  + 15) >> 4;
yading@10:     h->mb_height = (h->height + 15) >> 4;
yading@10:     h->avctx->time_base.den = ff_mpeg12_frame_rate_tab[frame_rate_code].num;
yading@10:     h->avctx->time_base.num = ff_mpeg12_frame_rate_tab[frame_rate_code].den;
yading@10:     h->avctx->width  = h->width;
yading@10:     h->avctx->height = h->height;
yading@10:     if (!h->top_qp)
yading@10:         ff_cavs_init_top_lines(h);
yading@10:     return 0;
yading@10: }
yading@10: 
yading@10: static void cavs_flush(AVCodecContext * avctx)
yading@10: {
yading@10:     AVSContext *h = avctx->priv_data;
yading@10:     h->got_keyframe = 0;
yading@10: }
yading@10: 
yading@10: static int cavs_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
yading@10:                              AVPacket *avpkt)
yading@10: {
yading@10:     AVSContext *h      = avctx->priv_data;
yading@10:     const uint8_t *buf = avpkt->data;
yading@10:     int buf_size       = avpkt->size;
yading@10:     uint32_t stc       = -1;
yading@10:     int input_size, ret;
yading@10:     const uint8_t *buf_end;
yading@10:     const uint8_t *buf_ptr;
yading@10: 
yading@10:     if (buf_size == 0) {
yading@10:         if (!h->low_delay && h->DPB[0].f->data[0]) {
yading@10:             *got_frame = 1;
yading@10:             av_frame_move_ref(data, h->DPB[0].f);
yading@10:         }
yading@10:         return 0;
yading@10:     }
yading@10: 
yading@10:     buf_ptr = buf;
yading@10:     buf_end = buf + buf_size;
yading@10:     for(;;) {
yading@10:         buf_ptr = avpriv_find_start_code(buf_ptr, buf_end, &stc);
yading@10:         if ((stc & 0xFFFFFE00) || buf_ptr == buf_end)
yading@10:             return FFMAX(0, buf_ptr - buf);
yading@10:         input_size = (buf_end - buf_ptr) * 8;
yading@10:         switch (stc) {
yading@10:         case CAVS_START_CODE:
yading@10:             init_get_bits(&h->gb, buf_ptr, input_size);
yading@10:             decode_seq_header(h);
yading@10:             break;
yading@10:         case PIC_I_START_CODE:
yading@10:             if (!h->got_keyframe) {
yading@10:                 av_frame_unref(h->DPB[0].f);
yading@10:                 av_frame_unref(h->DPB[1].f);
yading@10:                 h->got_keyframe = 1;
yading@10:             }
yading@10:         case PIC_PB_START_CODE:
yading@10:             *got_frame = 0;
yading@10:             if (!h->got_keyframe)
yading@10:                 break;
yading@10:             if(!h->top_qp)
yading@10:                 break;
yading@10:             init_get_bits(&h->gb, buf_ptr, input_size);
yading@10:             h->stc = stc;
yading@10:             if (decode_pic(h))
yading@10:                 break;
yading@10:             *got_frame = 1;
yading@10:             if (h->cur.f->pict_type != AV_PICTURE_TYPE_B) {
yading@10:                 if (h->DPB[1].f->data[0]) {
yading@10:                     if ((ret = av_frame_ref(data, h->DPB[1].f)) < 0)
yading@10:                         return ret;
yading@10:                 } else {
yading@10:                     *got_frame = 0;
yading@10:                 }
yading@10:             } else {
yading@10:                 av_frame_move_ref(data, h->cur.f);
yading@10:             }
yading@10:             break;
yading@10:         case EXT_START_CODE:
yading@10:             //mpeg_decode_extension(avctx, buf_ptr, input_size);
yading@10:             break;
yading@10:         case USER_START_CODE:
yading@10:             //mpeg_decode_user_data(avctx, buf_ptr, input_size);
yading@10:             break;
yading@10:         default:
yading@10:             if (stc <= SLICE_MAX_START_CODE) {
yading@10:                 init_get_bits(&h->gb, buf_ptr, input_size);
yading@10:                 decode_slice_header(h, &h->gb);
yading@10:             }
yading@10:             break;
yading@10:         }
yading@10:     }
yading@10: }
yading@10: 
yading@10: AVCodec ff_cavs_decoder = {
yading@10:     .name           = "cavs",
yading@10:     .type           = AVMEDIA_TYPE_VIDEO,
yading@10:     .id             = AV_CODEC_ID_CAVS,
yading@10:     .priv_data_size = sizeof(AVSContext),
yading@10:     .init           = ff_cavs_init,
yading@10:     .close          = ff_cavs_end,
yading@10:     .decode         = cavs_decode_frame,
yading@10:     .capabilities   = CODEC_CAP_DR1 | CODEC_CAP_DELAY,
yading@10:     .flush          = cavs_flush,
yading@10:     .long_name      = NULL_IF_CONFIG_SMALL("Chinese AVS (Audio Video Standard) (AVS1-P2, JiZhun profile)"),
yading@10: };