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FFmpeg/libavcodec/cavsdata.h

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  1. /*

  2.  * Chinese AVS video (AVS1-P2, JiZhun profile) decoder.

  3.  * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de>

  4.  *

  5.  * This library is free software; you can redistribute it and/or

  6.  * modify it under the terms of the GNU Lesser General Public

  7.  * License as published by the Free Software Foundation; either

  8.  * version 2 of the License, or (at your option) any later version.

  9.  *

  10.  * This library is distributed in the hope that it will be useful,

  11.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  13.  * Lesser General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU Lesser General Public

  16.  * License along with this library; if not, write to the Free Software

  17.  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

  18.  */

  19. 

  20. #define SLICE_MIN_START_CODE    0x00000101

  21. #define SLICE_MAX_START_CODE    0x000001af

  22. #define EXT_START_CODE          0x000001b5

  23. #define USER_START_CODE         0x000001b2

  24. #define SEQ_START_CODE          0x000001b0

  25. #define PIC_I_START_CODE        0x000001b3

  26. #define PIC_PB_START_CODE       0x000001b6

  27. 

  28. #define A_AVAIL                          1

  29. #define B_AVAIL                          2

  30. #define C_AVAIL                          4

  31. #define D_AVAIL                          8

  32. #define NOT_AVAIL                       -1

  33. #define REF_INTRA                       -2

  34. #define REF_DIR                         -3

  35. 

  36. #define ESCAPE_CODE                     59

  37. 

  38. #define FWD0                          0x01

  39. #define FWD1                          0x02

  40. #define BWD0                          0x04

  41. #define BWD1                          0x08

  42. #define SYM0                          0x10

  43. #define SYM1                          0x20

  44. 

  45. #define MV_BWD_OFFS                     12

  46. #define MV_STRIDE                        4

  47. 

  48. enum mb_t {

  49.   I_8X8 = 0,

  50.   P_SKIP,

  51.   P_16X16,

  52.   P_16X8,

  53.   P_8X16,

  54.   P_8X8,

  55.   B_SKIP,

  56.   B_DIRECT,

  57.   B_FWD_16X16,

  58.   B_BWD_16X16,

  59.   B_SYM_16X16,

  60.   B_8X8 = 29

  61. };

  62. 

  63. enum sub_mb_t {

  64.   B_SUB_DIRECT,

  65.   B_SUB_FWD,

  66.   B_SUB_BWD,

  67.   B_SUB_SYM

  68. };

  69. 

  70. enum intra_luma_t {

  71.   INTRA_L_VERT,

  72.   INTRA_L_HORIZ,

  73.   INTRA_L_LP,

  74.   INTRA_L_DOWN_LEFT,

  75.   INTRA_L_DOWN_RIGHT,

  76.   INTRA_L_LP_LEFT,

  77.   INTRA_L_LP_TOP,

  78.   INTRA_L_DC_128

  79. };

  80. 

  81. enum intra_chroma_t {

  82.   INTRA_C_LP,

  83.   INTRA_C_HORIZ,

  84.   INTRA_C_VERT,

  85.   INTRA_C_PLANE,

  86.   INTRA_C_LP_LEFT,

  87.   INTRA_C_LP_TOP,

  88.   INTRA_C_DC_128,

  89. };

  90. 

  91. enum mv_pred_t {

  92.   MV_PRED_MEDIAN,

  93.   MV_PRED_LEFT,

  94.   MV_PRED_TOP,

  95.   MV_PRED_TOPRIGHT,

  96.   MV_PRED_PSKIP,

  97.   MV_PRED_BSKIP

  98. };

  99. 

  100. enum block_t {

  101.   BLK_16X16,

  102.   BLK_16X8,

  103.   BLK_8X16,

  104.   BLK_8X8

  105. };

  106. 

  107. enum mv_loc_t {

  108.   MV_FWD_D3 = 0,

  109.   MV_FWD_B2,

  110.   MV_FWD_B3,

  111.   MV_FWD_C2,

  112.   MV_FWD_A1,

  113.   MV_FWD_X0,

  114.   MV_FWD_X1,

  115.   MV_FWD_A3 = 8,

  116.   MV_FWD_X2,

  117.   MV_FWD_X3,

  118.   MV_BWD_D3 = MV_BWD_OFFS,

  119.   MV_BWD_B2,

  120.   MV_BWD_B3,

  121.   MV_BWD_C2,

  122.   MV_BWD_A1,

  123.   MV_BWD_X0,

  124.   MV_BWD_X1,

  125.   MV_BWD_A3 = MV_BWD_OFFS+8,

  126.   MV_BWD_X2,

  127.   MV_BWD_X3

  128. };

  129. 

  130. static const uint8_t b_partition_flags[14] = {

  131.   0,0,0,0,0,

  132.   FWD0|FWD1,

  133.   BWD0|BWD1,

  134.   FWD0|BWD1,

  135.   BWD0|FWD1,

  136.   FWD0|SYM1,

  137.   BWD0|SYM1,

  138.   SYM0|FWD1,

  139.   SYM0|BWD1,

  140.   SYM0|SYM1

  141. };

  142. 

  143. static const uint8_t scan3x3[4] = {4,5,7,8};

  144. 

  145. static const uint8_t mv_scan[4] = {

  146.     MV_FWD_X0,MV_FWD_X1,

  147.     MV_FWD_X2,MV_FWD_X3

  148. };

  149. 

  150. static const uint8_t cbp_tab[64][2] = {

  151.   {63, 0},{15,15},{31,63},{47,31},{ 0,16},{14,32},{13,47},{11,13},

  152.   { 7,14},{ 5,11},{10,12},{ 8, 5},{12,10},{61, 7},{ 4,48},{55, 3},

  153.   { 1, 2},{ 2, 8},{59, 4},{ 3, 1},{62,61},{ 9,55},{ 6,59},{29,62},

  154.   {45,29},{51,27},{23,23},{39,19},{27,30},{46,28},{53, 9},{30, 6},

  155.   {43,60},{37,21},{60,44},{16,26},{21,51},{28,35},{19,18},{35,20},

  156.   {42,24},{26,53},{44,17},{32,37},{58,39},{24,45},{20,58},{17,43},

  157.   {18,42},{48,46},{22,36},{33,33},{25,34},{49,40},{40,52},{36,49},

  158.   {34,50},{50,56},{52,25},{54,22},{41,54},{56,57},{38,41},{57,38}

  159. };

  160. 

  161. static const uint8_t chroma_qp[64] = {

  162.   0,  1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,15,

  163.   16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,

  164.   32,33,34,35,36,37,38,39,40,41,42,42,43,43,44,44,

  165.   45,45,46,46,47,47,48,48,48,49,49,49,50,50,50,51

  166. };

  167. 

  168. static const uint8_t dequant_shift[64] = {

  169.   14,14,14,14,14,14,14,14,

  170.   13,13,13,13,13,13,13,13,

  171.   13,12,12,12,12,12,12,12,

  172.   11,11,11,11,11,11,11,11,

  173.   11,10,10,10,10,10,10,10,

  174.   10, 9, 9, 9, 9, 9, 9, 9,

  175.   9, 8, 8, 8, 8, 8, 8, 8,

  176.   7, 7, 7, 7, 7, 7, 7, 7

  177. };

  178. 

  179. static const uint16_t dequant_mul[64] = {

  180.   32768,36061,38968,42495,46341,50535,55437,60424,

  181.   32932,35734,38968,42495,46177,50535,55109,59933,

  182.   65535,35734,38968,42577,46341,50617,55027,60097,

  183.   32809,35734,38968,42454,46382,50576,55109,60056,

  184.   65535,35734,38968,42495,46320,50515,55109,60076,

  185.   65535,35744,38968,42495,46341,50535,55099,60087,

  186.   65535,35734,38973,42500,46341,50535,55109,60097,

  187.   32771,35734,38965,42497,46341,50535,55109,60099

  188. };

  189. 

  190. typedef struct {

  191.     int16_t x;

  192.     int16_t y;

  193.     int16_t dist;

  194.     int16_t ref;

  195. } vector_t;

  196. 

  197. // marks block as unavailable, i.e. out of picture

  198. //  or not yet decoded

  199. static const vector_t un_mv    = {0,0,1,NOT_AVAIL};

  200. 

  201. //marks block as "no prediction from this direction"

  202. // e.g. forward motion vector in BWD partition

  203. static const vector_t dir_mv   = {0,0,1,REF_DIR};

  204. 

  205. //marks block as using intra prediction

  206. static const vector_t intra_mv = {0,0,1,REF_INTRA};

  207. 

  208. typedef struct residual_vlc_t {

  209.   int8_t rltab[59][3];

  210.   int8_t level_add[26];

  211.   int8_t golomb_order;

  212.   int inc_limit;

  213.   int8_t max_run;

  214. } residual_vlc_t;

  215. 

  216. static const residual_vlc_t intra_2dvlc[7] = {

  217.   {

  218.     { //level / run / table_inc

  219.       {  1, 0, 1},{ -1, 0, 1},{  1, 1, 1},{ -1, 1, 1},{  1, 2, 1},{ -1, 2, 1},

  220.       {  1, 3, 1},{ -1, 3, 1},{  1, 4, 1},{ -1, 4, 1},{  1, 5, 1},{ -1, 5, 1},

  221.       {  1, 6, 1},{ -1, 6, 1},{  1, 7, 1},{ -1, 7, 1},{  1, 8, 1},{ -1, 8, 1},

  222.       {  1, 9, 1},{ -1, 9, 1},{  1,10, 1},{ -1,10, 1},{  2, 0, 2},{ -2, 0, 2},

  223.       {  1,11, 1},{ -1,11, 1},{  1,12, 1},{ -1,12, 1},{  1,13, 1},{ -1,13, 1},

  224.       {  1,14, 1},{ -1,14, 1},{  2, 1, 2},{ -2, 1, 2},{  1,15, 1},{ -1,15, 1},

  225.       {  1,16, 1},{ -1,16, 1},{  3, 0, 3},{ -3, 0, 3},{  1,17, 1},{ -1,17, 1},

  226.       {  1,18, 1},{ -1,18, 1},{  2, 2, 2},{ -2, 2, 2},{  1,19, 1},{ -1,19, 1},

  227.       {  1,20, 1},{ -1,20, 1},{  2, 3, 2},{ -2, 3, 2},{  1,21, 1},{ -1,21, 1},

  228.       {  2, 4, 2},{ -2, 4, 2},{  1,22, 1},{ -1,22, 1},{  0, 0,-1}

  229.     },

  230.     //level_add

  231.     { 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  232.       2, 2, 2, 2, 2, 2, 2,-1,-1,-1},

  233.     2, //golomb_order

  234.     0, //inc_limit

  235.     22, //max_run

  236.   },{

  237.     { //level / run

  238.       {  1, 0, 0},{ -1, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  2, 0, 1},{ -2, 0, 1},

  239.       {  1, 2, 0},{ -1, 2, 0},{  0, 0, 0},{  1, 3, 0},{ -1, 3, 0},{  1, 4, 0},

  240.       { -1, 4, 0},{  1, 5, 0},{ -1, 5, 0},{  3, 0, 2},{ -3, 0, 2},{  2, 1, 1},

  241.       { -2, 1, 1},{  1, 6, 0},{ -1, 6, 0},{  1, 7, 0},{ -1, 7, 0},{  1, 8, 0},

  242.       { -1, 8, 0},{  2, 2, 1},{ -2, 2, 1},{  4, 0, 2},{ -4, 0, 2},{  1, 9, 0},

  243.       { -1, 9, 0},{  1,10, 0},{ -1,10, 0},{  2, 3, 1},{ -2, 3, 1},{  3, 1, 2},

  244.       { -3, 1, 2},{  1,11, 0},{ -1,11, 0},{  2, 4, 1},{ -2, 4, 1},{  5, 0, 3},

  245.       { -5, 0, 3},{  1,12, 0},{ -1,12, 0},{  2, 5, 1},{ -2, 5, 1},{  1,13, 0},

  246.       { -1,13, 0},{  2, 6, 1},{ -2, 6, 1},{  2, 7, 1},{ -2, 7, 1},{  3, 2, 2},

  247.       { -3, 2, 2},{  6, 0, 3},{ -6, 0, 3},{  1,14, 0},{ -1,14, 0}

  248.     },

  249.     //level_add

  250.     { 7, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2,-1,

  251.       -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  252.     2, //golomb_order

  253.     1, //inc_limit

  254.     14, //max_run

  255.   },{

  256.     { //level / run

  257.       {  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  1, 1, 0},{ -1, 1, 0},

  258.       {  3, 0, 1},{ -3, 0, 1},{  0, 0, 0},{  1, 2, 0},{ -1, 2, 0},{  2, 1, 0},

  259.       { -2, 1, 0},{  4, 0, 1},{ -4, 0, 1},{  1, 3, 0},{ -1, 3, 0},{  5, 0, 2},

  260.       { -5, 0, 2},{  1, 4, 0},{ -1, 4, 0},{  3, 1, 1},{ -3, 1, 1},{  2, 2, 0},

  261.       { -2, 2, 0},{  1, 5, 0},{ -1, 5, 0},{  6, 0, 2},{ -6, 0, 2},{  2, 3, 0},

  262.       { -2, 3, 0},{  1, 6, 0},{ -1, 6, 0},{  4, 1, 1},{ -4, 1, 1},{  7, 0, 2},

  263.       { -7, 0, 2},{  3, 2, 1},{ -3, 2, 1},{  2, 4, 0},{ -2, 4, 0},{  1, 7, 0},

  264.       { -1, 7, 0},{  2, 5, 0},{ -2, 5, 0},{  8, 0, 3},{ -8, 0, 3},{  1, 8, 0},

  265.       { -1, 8, 0},{  5, 1, 2},{ -5, 1, 2},{  3, 3, 1},{ -3, 3, 1},{  2, 6, 0},

  266.       { -2, 6, 0},{  9, 0, 3},{ -9, 0, 3},{  1, 9, 0},{ -1, 9, 0}

  267.     },

  268.     //level_add

  269.     {10, 6, 4, 4, 3, 3, 3, 2, 2, 2,-1,-1,-1,-1,-1,-1,

  270.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  271.     2, //golomb_order

  272.     2, //inc_limit

  273.     9, //max_run

  274.   },{

  275.     { //level / run

  276.       {  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},{ -3, 0, 0},

  277.       {  1, 1, 0},{ -1, 1, 0},{  0, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 1},

  278.       { -5, 0, 1},{  2, 1, 0},{ -2, 1, 0},{  1, 2, 0},{ -1, 2, 0},{  6, 0, 1},

  279.       { -6, 0, 1},{  3, 1, 0},{ -3, 1, 0},{  7, 0, 1},{ -7, 0, 1},{  1, 3, 0},

  280.       { -1, 3, 0},{  8, 0, 2},{ -8, 0, 2},{  2, 2, 0},{ -2, 2, 0},{  4, 1, 0},

  281.       { -4, 1, 0},{  1, 4, 0},{ -1, 4, 0},{  9, 0, 2},{ -9, 0, 2},{  5, 1, 1},

  282.       { -5, 1, 1},{  2, 3, 0},{ -2, 3, 0},{ 10, 0, 2},{-10, 0, 2},{  3, 2, 0},

  283.       { -3, 2, 0},{  1, 5, 0},{ -1, 5, 0},{ 11, 0, 3},{-11, 0, 3},{  6, 1, 1},

  284.       { -6, 1, 1},{  1, 6, 0},{ -1, 6, 0},{  2, 4, 0},{ -2, 4, 0},{  3, 3, 0},

  285.       { -3, 3, 0},{ 12, 0, 3},{-12, 0, 3},{  4, 2, 0},{ -4, 2, 0}

  286.     },

  287.     //level_add

  288.     {13, 7, 5, 4, 3, 2, 2,-1,-1,-1 -1,-1,-1,-1,-1,-1,

  289.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  290.     2, //golomb_order

  291.     4, //inc_limit

  292.     6, //max_run

  293.   },{

  294.     { //level / run

  295.       {  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},{ -3, 0, 0},

  296.       {  0, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},{ -5, 0, 0},{  6, 0, 0},

  297.       { -6, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  7, 0, 0},{ -7, 0, 0},{  8, 0, 1},

  298.       { -8, 0, 1},{  2, 1, 0},{ -2, 1, 0},{  9, 0, 1},{ -9, 0, 1},{ 10, 0, 1},

  299.       {-10, 0, 1},{  1, 2, 0},{ -1, 2, 0},{  3, 1, 0},{ -3, 1, 0},{ 11, 0, 2},

  300.       {-11, 0, 2},{  4, 1, 0},{ -4, 1, 0},{ 12, 0, 2},{-12, 0, 2},{ 13, 0, 2},

  301.       {-13, 0, 2},{  5, 1, 0},{ -5, 1, 0},{  1, 3, 0},{ -1, 3, 0},{  2, 2, 0},

  302.       { -2, 2, 0},{ 14, 0, 2},{-14, 0, 2},{  6, 1, 0},{ -6, 1, 0},{ 15, 0, 2},

  303.       {-15, 0, 2},{ 16, 0, 2},{-16, 0, 2},{  3, 2, 0},{ -3, 2, 0},{  1, 4, 0},

  304.       { -1, 4, 0},{  7, 1, 0},{ -7, 1, 0},{ 17, 0, 2},{-17, 0, 2},

  305.     },

  306.     //level_add

  307.     {18, 8, 4, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  308.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  309.     2, //golomb_order

  310.     7, //inc_limit

  311.     4, //max_run

  312.   },{

  313.     { //level / run

  314.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  315.       { -3, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},{ -5, 0, 0},{  6, 0, 0},

  316.       { -6, 0, 0},{  7, 0, 0},{ -7, 0, 0},{  8, 0, 0},{ -8, 0, 0},{  9, 0, 0},

  317.       { -9, 0, 0},{ 10, 0, 0},{-10, 0, 0},{  1, 1, 0},{ -1, 1, 0},{ 11, 0, 1},

  318.       {-11, 0, 1},{ 12, 0, 1},{-12, 0, 1},{ 13, 0, 1},{-13, 0, 1},{  2, 1, 0},

  319.       { -2, 1, 0},{ 14, 0, 1},{-14, 0, 1},{ 15, 0, 1},{-15, 0, 1},{  3, 1, 0},

  320.       { -3, 1, 0},{ 16, 0, 1},{-16, 0, 1},{  1, 2, 0},{ -1, 2, 0},{ 17, 0, 1},

  321.       {-17, 0, 1},{  4, 1, 0},{ -4, 1, 0},{ 18, 0, 1},{-18, 0, 1},{  5, 1, 0},

  322.       { -5, 1, 0},{ 19, 0, 1},{-19, 0, 1},{ 20, 0, 1},{-20, 0, 1},{  6, 1, 0},

  323.       { -6, 1, 0},{ 21, 0, 1},{-21, 0, 1},{  2, 2, 0},{ -2, 2, 0},

  324.     },

  325.     //level_add

  326.     {22, 7, 3,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  327.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  328.     2, //golomb_order

  329.     10, //inc_limit

  330.     2, //max_run

  331.   },{

  332.     { //level / run

  333.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  334.       { -3, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},{ -5, 0, 0},{  6, 0, 0},

  335.       { -6, 0, 0},{  7, 0, 0},{ -7, 0, 0},{  8, 0, 0},{ -8, 0, 0},{  9, 0, 0},

  336.       { -9, 0, 0},{ 10, 0, 0},{-10, 0, 0},{ 11, 0, 0},{-11, 0, 0},{ 12, 0, 0},

  337.       {-12, 0, 0},{ 13, 0, 0},{-13, 0, 0},{ 14, 0, 0},{-14, 0, 0},{ 15, 0, 0},

  338.       {-15, 0, 0},{ 16, 0, 0},{-16, 0, 0},{  1, 1, 0},{ -1, 1, 0},{ 17, 0, 0},

  339.       {-17, 0, 0},{ 18, 0, 0},{-18, 0, 0},{ 19, 0, 0},{-19, 0, 0},{ 20, 0, 0},

  340.       {-20, 0, 0},{ 21, 0, 0},{-21, 0, 0},{  2, 1, 0},{ -2, 1, 0},{ 22, 0, 0},

  341.       {-22, 0, 0},{ 23, 0, 0},{-23, 0, 0},{ 24, 0, 0},{-24, 0, 0},{ 25, 0, 0},

  342.       {-25, 0, 0},{  3, 1, 0},{ -3, 1, 0},{ 26, 0, 0},{-26, 0, 0}

  343.     },

  344.     //level_add

  345.     {27, 4,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  346.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  347.     2, //golomb_order

  348.     INT_MAX, //inc_limit

  349.     1, //max_run

  350.   }

  351. };

  352. 

  353. static const residual_vlc_t inter_2dvlc[7] = {

  354.   {

  355.     { //level / run

  356.       {  1, 0, 1},{ -1, 0, 1},{  1, 1, 1},{ -1, 1, 1},{  1, 2, 1},{ -1, 2, 1},

  357.       {  1, 3, 1},{ -1, 3, 1},{  1, 4, 1},{ -1, 4, 1},{  1, 5, 1},{ -1, 5, 1},

  358.       {  1, 6, 1},{ -1, 6, 1},{  1, 7, 1},{ -1, 7, 1},{  1, 8, 1},{ -1, 8, 1},

  359.       {  1, 9, 1},{ -1, 9, 1},{  1,10, 1},{ -1,10, 1},{  1,11, 1},{ -1,11, 1},

  360.       {  1,12, 1},{ -1,12, 1},{  2, 0, 2},{ -2, 0, 2},{  1,13, 1},{ -1,13, 1},

  361.       {  1,14, 1},{ -1,14, 1},{  1,15, 1},{ -1,15, 1},{  1,16, 1},{ -1,16, 1},

  362.       {  1,17, 1},{ -1,17, 1},{  1,18, 1},{ -1,18, 1},{  3, 0, 3},{ -3, 0, 3},

  363.       {  1,19, 1},{ -1,19, 1},{  1,20, 1},{ -1,20, 1},{  2, 1, 2},{ -2, 1, 2},

  364.       {  1,21, 1},{ -1,21, 1},{  1,22, 1},{ -1,22, 1},{  1,23, 1},{ -1,23, 1},

  365.       {  1,24, 1},{ -1,24, 1},{  1,25, 1},{ -1,25, 1},{  0, 0,-1}

  366.     },

  367.     //level_add

  368.     { 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  369.       2, 2, 2, 2, 2, 2, 2, 2, 2, 2},

  370.     3, //golomb_order

  371.     0, //inc_limit

  372.     25 //max_run

  373.   },{

  374.     { //level / run

  375.       {  1, 0, 0},{ -1, 0, 0},{  0, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  1, 2, 0},

  376.       { -1, 2, 0},{  1, 3, 0},{ -1, 3, 0},{  1, 4, 0},{ -1, 4, 0},{  1, 5, 0},

  377.       { -1, 5, 0},{  2, 0, 1},{ -2, 0, 1},{  1, 6, 0},{ -1, 6, 0},{  1, 7, 0},

  378.       { -1, 7, 0},{  1, 8, 0},{ -1, 8, 0},{  1, 9, 0},{ -1, 9, 0},{  2, 1, 1},

  379.       { -2, 1, 1},{  1,10, 0},{ -1,10, 0},{  1,11, 0},{ -1,11, 0},{  3, 0, 2},

  380.       { -3, 0, 2},{  1,12, 0},{ -1,12, 0},{  1,13, 0},{ -1,13, 0},{  2, 2, 1},

  381.       { -2, 2, 1},{  1,14, 0},{ -1,14, 0},{  2, 3, 1},{ -2, 3, 1},{  1,15, 0},

  382.       { -1,15, 0},{  2, 4, 1},{ -2, 4, 1},{  1,16, 0},{ -1,16, 0},{  4, 0, 3},

  383.       { -4, 0, 3},{  2, 5, 1},{ -2, 5, 1},{  1,17, 0},{ -1,17, 0},{  1,18, 0},

  384.       { -1,18, 0},{  2, 6, 1},{ -2, 6, 1},{  3, 1, 2},{ -3, 1, 2},

  385.     },

  386.     //level_add

  387.     { 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  388.       2, 2, 2,-1,-1,-1,-1,-1,-1,-1},

  389.     2, //golomb_order

  390.     1, //inc_limit

  391.     18 //max_run

  392.   },{

  393.     { //level / run

  394.       {  1, 0, 0},{ -1, 0, 0},{  0, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  2, 0, 0},

  395.       { -2, 0, 0},{  1, 2, 0},{ -1, 2, 0},{  1, 3, 0},{ -1, 3, 0},{  3, 0, 1},

  396.       { -3, 0, 1},{  2, 1, 0},{ -2, 1, 0},{  1, 4, 0},{ -1, 4, 0},{  1, 5, 0},

  397.       { -1, 5, 0},{  1, 6, 0},{ -1, 6, 0},{  2, 2, 0},{ -2, 2, 0},{  4, 0, 2},

  398.       { -4, 0, 2},{  1, 7, 0},{ -1, 7, 0},{  3, 1, 1},{ -3, 1, 1},{  2, 3, 0},

  399.       { -2, 3, 0},{  1, 8, 0},{ -1, 8, 0},{  1, 9, 0},{ -1, 9, 0},{  5, 0, 2},

  400.       { -5, 0, 2},{  2, 4, 0},{ -2, 4, 0},{  1,10, 0},{ -1,10, 0},{  2, 5, 0},

  401.       { -2, 5, 0},{  1,11, 0},{ -1,11, 0},{  3, 2, 1},{ -3, 2, 1},{  6, 0, 2},

  402.       { -6, 0, 2},{  4, 1, 2},{ -4, 1, 2},{  1,12, 0},{ -1,12, 0},{  2, 6, 0},

  403.       { -2, 6, 0},{  3, 3, 1},{ -3, 3, 1},{  1,13, 0},{ -1,13, 0},

  404.     },

  405.     //level_add

  406.     { 7, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2,-1,-1,

  407.       -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  408.     2, //golomb_order

  409.     2, //inc_limit

  410.     13 //max_run

  411.   },{

  412.     { //level / run

  413.       {  1, 0, 0},{ -1, 0, 0},{  0, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  1, 1, 0},

  414.       { -1, 1, 0},{  3, 0, 0},{ -3, 0, 0},{  1, 2, 0},{ -1, 2, 0},{  2, 1, 0},

  415.       { -2, 1, 0},{  4, 0, 1},{ -4, 0, 1},{  1, 3, 0},{ -1, 3, 0},{  5, 0, 1},

  416.       { -5, 0, 1},{  1, 4, 0},{ -1, 4, 0},{  3, 1, 0},{ -3, 1, 0},{  2, 2, 0},

  417.       { -2, 2, 0},{  1, 5, 0},{ -1, 5, 0},{  6, 0, 1},{ -6, 0, 1},{  2, 3, 0},

  418.       { -2, 3, 0},{  1, 6, 0},{ -1, 6, 0},{  4, 1, 1},{ -4, 1, 1},{  7, 0, 2},

  419.       { -7, 0, 2},{  3, 2, 0},{ -3, 2, 0},{  1, 7, 0},{ -1, 7, 0},{  2, 4, 0},

  420.       { -2, 4, 0},{  8, 0, 2},{ -8, 0, 2},{  1, 8, 0},{ -1, 8, 0},{  3, 3, 0},

  421.       { -3, 3, 0},{  2, 5, 0},{ -2, 5, 0},{  5, 1, 1},{ -5, 1, 1},{  1, 9, 0},

  422.       { -1, 9, 0},{  9, 0, 2},{ -9, 0, 2},{  4, 2, 1},{ -4, 2, 1},

  423.     },

  424.     //level_add

  425.     {10, 6, 5, 4, 3, 3, 2, 2, 2, 2,-1,-1,-1,-1,-1,-1,

  426.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  427.     2, //golomb_order

  428.     3, //inc_limit

  429.     9 //max_run

  430.   },{

  431.     { //level / run

  432.       {  1, 0, 0},{ -1, 0, 0},{  0, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  433.       { -3, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},

  434.       { -5, 0, 0},{  2, 1, 0},{ -2, 1, 0},{  1, 2, 0},{ -1, 2, 0},{  6, 0, 0},

  435.       { -6, 0, 0},{  3, 1, 0},{ -3, 1, 0},{  7, 0, 1},{ -7, 0, 1},{  1, 3, 0},

  436.       { -1, 3, 0},{  8, 0, 1},{ -8, 0, 1},{  2, 2, 0},{ -2, 2, 0},{  4, 1, 0},

  437.       { -4, 1, 0},{  1, 4, 0},{ -1, 4, 0},{  9, 0, 1},{ -9, 0, 1},{  5, 1, 0},

  438.       { -5, 1, 0},{  2, 3, 0},{ -2, 3, 0},{  1, 5, 0},{ -1, 5, 0},{ 10, 0, 2},

  439.       {-10, 0, 2},{  3, 2, 0},{ -3, 2, 0},{ 11, 0, 2},{-11, 0, 2},{  1, 6, 0},

  440.       { -1, 6, 0},{  6, 1, 0},{ -6, 1, 0},{  3, 3, 0},{ -3, 3, 0},{  2, 4, 0},

  441.       { -2, 4, 0},{ 12, 0, 2},{-12, 0, 2},{  4, 2, 0},{ -4, 2, 0},

  442.     },

  443.     //level_add

  444.     {13, 7, 5, 4, 3, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  445.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  446.     2, //golomb_order

  447.     6, //inc_limit

  448.     6 //max_run

  449.   },{

  450.     { //level / run

  451.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  452.       { -3, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},{ -5, 0, 0},{  1, 1, 0},

  453.       { -1, 1, 0},{  6, 0, 0},{ -6, 0, 0},{  7, 0, 0},{ -7, 0, 0},{  8, 0, 0},

  454.       { -8, 0, 0},{  2, 1, 0},{ -2, 1, 0},{  9, 0, 0},{ -9, 0, 0},{  1, 2, 0},

  455.       { -1, 2, 0},{ 10, 0, 1},{-10, 0, 1},{  3, 1, 0},{ -3, 1, 0},{ 11, 0, 1},

  456.       {-11, 0, 1},{  4, 1, 0},{ -4, 1, 0},{ 12, 0, 1},{-12, 0, 1},{  1, 3, 0},

  457.       { -1, 3, 0},{  2, 2, 0},{ -2, 2, 0},{ 13, 0, 1},{-13, 0, 1},{  5, 1, 0},

  458.       { -5, 1, 0},{ 14, 0, 1},{-14, 0, 1},{  6, 1, 0},{ -6, 1, 0},{  1, 4, 0},

  459.       { -1, 4, 0},{ 15, 0, 1},{-15, 0, 1},{  3, 2, 0},{ -3, 2, 0},{ 16, 0, 1},

  460.       {-16, 0, 1},{  2, 3, 0},{ -2, 3, 0},{  7, 1, 0},{ -7, 1, 0},

  461.     },

  462.     //level_add

  463.     {17, 8, 4, 3, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  464.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  465.     2, //golomb_order

  466.     9, //inc_limit

  467.     4 //max_run

  468.   },{

  469.     { //level / run

  470.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  471.       { -3, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},{ -5, 0, 0},{  6, 0, 0},

  472.       { -6, 0, 0},{  7, 0, 0},{ -7, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  8, 0, 0},

  473.       { -8, 0, 0},{  9, 0, 0},{ -9, 0, 0},{ 10, 0, 0},{-10, 0, 0},{ 11, 0, 0},

  474.       {-11, 0, 0},{ 12, 0, 0},{-12, 0, 0},{  2, 1, 0},{ -2, 1, 0},{ 13, 0, 0},

  475.       {-13, 0, 0},{  1, 2, 0},{ -1, 2, 0},{ 14, 0, 0},{-14, 0, 0},{ 15, 0, 0},

  476.       {-15, 0, 0},{  3, 1, 0},{ -3, 1, 0},{ 16, 0, 0},{-16, 0, 0},{ 17, 0, 0},

  477.       {-17, 0, 0},{ 18, 0, 0},{-18, 0, 0},{  4, 1, 0},{ -4, 1, 0},{ 19, 0, 0},

  478.       {-19, 0, 0},{ 20, 0, 0},{-20, 0, 0},{  2, 2, 0},{ -2, 2, 0},{  1, 3, 0},

  479.       { -1, 3, 0},{  5, 1, 0},{ -5, 1, 0},{ 21, 0, 0},{-21, 0, 0},

  480.     },

  481.     //level_add

  482.     {22, 6, 3, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  483.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  484.     2, //golomb_order

  485.     INT_MAX, //inc_limit

  486.     3 //max_run

  487.   }

  488. };

  489. 

  490. static const residual_vlc_t chroma_2dvlc[5] = {

  491.   {

  492.     { //level / run

  493.       {  1, 0, 1},{ -1, 0, 1},{  1, 1, 1},{ -1, 1, 1},{  1, 2, 1},{ -1, 2, 1},

  494.       {  1, 3, 1},{ -1, 3, 1},{  1, 4, 1},{ -1, 4, 1},{  1, 5, 1},{ -1, 5, 1},

  495.       {  1, 6, 1},{ -1, 6, 1},{  2, 0, 2},{ -2, 0, 2},{  1, 7, 1},{ -1, 7, 1},

  496.       {  1, 8, 1},{ -1, 8, 1},{  1, 9, 1},{ -1, 9, 1},{  1,10, 1},{ -1,10, 1},

  497.       {  1,11, 1},{ -1,11, 1},{  1,12, 1},{ -1,12, 1},{  1,13, 1},{ -1,13, 1},

  498.       {  1,14, 1},{ -1,14, 1},{  3, 0, 3},{ -3, 0, 3},{  1,15, 1},{ -1,15, 1},

  499.       {  1,16, 1},{ -1,16, 1},{  1,17, 1},{ -1,17, 1},{  1,18, 1},{ -1,18, 1},

  500.       {  1,19, 1},{ -1,19, 1},{  1,20, 1},{ -1,20, 1},{  1,21, 1},{ -1,21, 1},

  501.       {  2, 1, 2},{ -2, 1, 2},{  1,22, 1},{ -1,22, 1},{  1,23, 1},{ -1,23, 1},

  502.       {  1,24, 1},{ -1,24, 1},{  4, 0, 3},{ -4, 0, 3},{  0, 0,-1}

  503.     },

  504.     //level_add

  505.     { 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  506.       2, 2, 2, 2, 2, 2, 2, 2, 2,-1},

  507.     2, //golomb_order

  508.     0, //inc_limit

  509.     24, //max_run

  510.   },{

  511.     { //level / run

  512.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  2, 0, 1},

  513.       { -2, 0, 1},{  1, 2, 0},{ -1, 2, 0},{  1, 3, 0},{ -1, 3, 0},{  1, 4, 0},

  514.       { -1, 4, 0},{  1, 5, 0},{ -1, 5, 0},{  3, 0, 2},{ -3, 0, 2},{  1, 6, 0},

  515.       { -1, 6, 0},{  1, 7, 0},{ -1, 7, 0},{  2, 1, 1},{ -2, 1, 1},{  1, 8, 0},

  516.       { -1, 8, 0},{  1, 9, 0},{ -1, 9, 0},{  1,10, 0},{ -1,10, 0},{  4, 0, 2},

  517.       { -4, 0, 2},{  1,11, 0},{ -1,11, 0},{  1,12, 0},{ -1,12, 0},{  1,13, 0},

  518.       { -1,13, 0},{  2, 2, 1},{ -2, 2, 1},{  1,14, 0},{ -1,14, 0},{  2, 3, 1},

  519.       { -2, 3, 1},{  5, 0, 3},{ -5, 0, 3},{  3, 1, 2},{ -3, 1, 2},{  1,15, 0},

  520.       { -1,15, 0},{  1,16, 0},{ -1,16, 0},{  1,17, 0},{ -1,17, 0},{  2, 4, 1},

  521.       { -2, 4, 1},{  1,18, 0},{ -1,18, 0},{  1,19, 0},{ -1,19, 0},

  522.     },

  523.     //level_add

  524.     { 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,

  525.       2, 2, 2, 2,-1,-1,-1,-1,-1,-1},

  526.     0, //golomb_order

  527.     1, //inc_limit

  528.     19, //max_run

  529.   },{

  530.     { //level / run

  531.       {  1, 0, 0},{ -1, 0, 0},{  0, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  1, 1, 0},

  532.       { -1, 1, 0},{  3, 0, 1},{ -3, 0, 1},{  1, 2, 0},{ -1, 2, 0},{  4, 0, 1},

  533.       { -4, 0, 1},{  2, 1, 0},{ -2, 1, 0},{  1, 3, 0},{ -1, 3, 0},{  5, 0, 2},

  534.       { -5, 0, 2},{  1, 4, 0},{ -1, 4, 0},{  3, 1, 1},{ -3, 1, 1},{  2, 2, 0},

  535.       { -2, 2, 0},{  1, 5, 0},{ -1, 5, 0},{  6, 0, 2},{ -6, 0, 2},{  1, 6, 0},

  536.       { -1, 6, 0},{  2, 3, 0},{ -2, 3, 0},{  7, 0, 2},{ -7, 0, 2},{  1, 7, 0},

  537.       { -1, 7, 0},{  4, 1, 1},{ -4, 1, 1},{  1, 8, 0},{ -1, 8, 0},{  3, 2, 1},

  538.       { -3, 2, 1},{  2, 4, 0},{ -2, 4, 0},{  2, 5, 0},{ -2, 5, 0},{  8, 0, 2},

  539.       { -8, 0, 2},{  1, 9, 0},{ -1, 9, 0},{  1,10, 0},{ -1,10, 0},{  9, 0, 2},

  540.       { -9, 0, 2},{  5, 1, 2},{ -5, 1, 2},{  3, 3, 1},{ -3, 3, 1},

  541.     },

  542.     //level_add

  543.     {10, 6, 4, 4, 3, 3, 2, 2, 2, 2, 2,-1,-1,-1,-1,-1,

  544.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  545.     1, //golomb_order

  546.     2, //inc_limit

  547.     10, //max_run

  548.   },{

  549.     { //level / run

  550.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  551.       { -3, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  1, 1, 0},{ -1, 1, 0},{  5, 0, 1},

  552.       { -5, 0, 1},{  2, 1, 0},{ -2, 1, 0},{  6, 0, 1},{ -6, 0, 1},{  1, 2, 0},

  553.       { -1, 2, 0},{  7, 0, 1},{ -7, 0, 1},{  3, 1, 0},{ -3, 1, 0},{  8, 0, 1},

  554.       { -8, 0, 1},{  1, 3, 0},{ -1, 3, 0},{  2, 2, 0},{ -2, 2, 0},{  9, 0, 1},

  555.       { -9, 0, 1},{  4, 1, 0},{ -4, 1, 0},{  1, 4, 0},{ -1, 4, 0},{ 10, 0, 1},

  556.       {-10, 0, 1},{  3, 2, 0},{ -3, 2, 0},{  5, 1, 1},{ -5, 1, 1},{  2, 3, 0},

  557.       { -2, 3, 0},{ 11, 0, 1},{-11, 0, 1},{  1, 5, 0},{ -1, 5, 0},{ 12, 0, 1},

  558.       {-12, 0, 1},{  1, 6, 0},{ -1, 6, 0},{  6, 1, 1},{ -6, 1, 1},{ 13, 0, 1},

  559.       {-13, 0, 1},{  2, 4, 0},{ -2, 4, 0},{  1, 7, 0},{ -1, 7, 0},

  560.     },

  561.     //level_add

  562.     {14, 7, 4, 3, 3, 2, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,

  563.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  564.     1, //golomb_order

  565.     4, //inc_limit

  566.     7, //max_run

  567.   },{

  568.     { //level / run

  569.       {  0, 0, 0},{  1, 0, 0},{ -1, 0, 0},{  2, 0, 0},{ -2, 0, 0},{  3, 0, 0},

  570.       { -3, 0, 0},{  4, 0, 0},{ -4, 0, 0},{  5, 0, 0},{ -5, 0, 0},{  6, 0, 0},

  571.       { -6, 0, 0},{  7, 0, 0},{ -7, 0, 0},{  8, 0, 0},{ -8, 0, 0},{  1, 1, 0},

  572.       { -1, 1, 0},{  9, 0, 0},{ -9, 0, 0},{ 10, 0, 0},{-10, 0, 0},{ 11, 0, 0},

  573.       {-11, 0, 0},{  2, 1, 0},{ -2, 1, 0},{ 12, 0, 0},{-12, 0, 0},{ 13, 0, 0},

  574.       {-13, 0, 0},{  3, 1, 0},{ -3, 1, 0},{ 14, 0, 0},{-14, 0, 0},{  1, 2, 0},

  575.       { -1, 2, 0},{ 15, 0, 0},{-15, 0, 0},{  4, 1, 0},{ -4, 1, 0},{ 16, 0, 0},

  576.       {-16, 0, 0},{ 17, 0, 0},{-17, 0, 0},{  5, 1, 0},{ -5, 1, 0},{  1, 3, 0},

  577.       { -1, 3, 0},{  2, 2, 0},{ -2, 2, 0},{ 18, 0, 0},{-18, 0, 0},{  6, 1, 0},

  578.       { -6, 1, 0},{ 19, 0, 0},{-19, 0, 0},{  1, 4, 0},{ -1, 4, 0},

  579.     },

  580.     //level_add

  581.     {20, 7, 3, 2, 2,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,

  582.      -1,-1,-1,-1,-1,-1,-1,-1,-1,-1},

  583.     0, //golomb_order

  584.     INT_MAX, //inc_limit

  585.     4, //max_run

  586.   }

  587. };

  588. 

  589. static const uint8_t alpha_tab[64] = {

  590.    0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  2,  2,  2,  3,  3,

  591.    4,  4,  5,  5,  6,  7,  8,  9, 10, 11, 12, 13, 15, 16, 18, 20,

  592.   22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,

  593.   46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64

  594. };

  595. 

  596. static const uint8_t beta_tab[64] = {

  597.    0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,

  598.    2,  2,  3,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,  5,  6,  6,

  599.    6,  7,  7,  7,  8,  8,  8,  9,  9, 10, 10, 11, 11, 12, 13, 14,

  600.   15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27

  601. };

  602. 

  603. static const uint8_t tc_tab[64] = {

  604.   0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,

  605.   1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,

  606.   2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,

  607.   5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9

  608. };

  609. 

  610. static const int_fast8_t left_modifier_l[8] = { 0,-1, 6,-1,-1, 7, 6, 7};

  611. static const int_fast8_t top_modifier_l[8]  = {-1, 1, 5,-1,-1, 5, 7, 7};

  612. static const int_fast8_t left_modifier_c[7] = { 5,-1, 2,-1, 6, 5, 6};

  613. static const int_fast8_t top_modifier_c[7]  = { 4, 1,-1,-1, 4, 6, 6};