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FFmpeg/libavcodec/svq1.c

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  1. /*

  2.  * 

  3.  * Copyright (C) 2002 the xine project

  4.  * Copyright (C) 2002 the ffmpeg project

  5.  * 

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

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

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

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

  10.  *

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

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

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

  14.  * Lesser General Public License for more details.

  15.  *

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

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

  18.  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  19.  *

  20.  * Ported to mplayer by Arpi <arpi@thot.banki.hu>

  21.  * Ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>

  22.  *

  23.  */

  24. //#define DEBUG_SVQ1

  25. #include <stdio.h>

  26. #include <stdlib.h>

  27. #include <string.h>

  28. #include <unistd.h>

  29. 

  30. #include "common.h"

  31. #include "avcodec.h"

  32. #include "dsputil.h"

  33. #include "mpegvideo.h"

  34. #include "bswap.h"

  35. #define bit_buffer_t GetBitContext

  36. 

  37. static inline unsigned int get_bit_cache(GetBitContext *s){

  38.     OPEN_READER(re, s)

  39.     UPDATE_CACHE(re, s)

  40.     return GET_CACHE(re, s);

  41. //    CLOSE_READER(re, s)

  42. }

  43. 

  44. /* variable length (bit) code */

  45. typedef struct vlc_code_s {

  46.   int16_t	 value	:10,

  47. 		 length	:6;

  48. } vlc_code_t;

  49. 

  50. #define MEDIAN(a,b,c)	(((a < b) != (b >= c)) ? b : (((a < c) != (c > b)) ? c : a))

  51. 

  52. #define SVQ1_BLOCK_SKIP		0

  53. #define SVQ1_BLOCK_INTER	1

  54. #define SVQ1_BLOCK_INTER_4V	2

  55. #define SVQ1_BLOCK_INTRA	3

  56. 

  57. /* motion vector (prediction) */

  58. typedef struct svq1_pmv_s {

  59.   int		 x;

  60.   int		 y;

  61. } svq1_pmv_t;

  62. 

  63. #include "svq1_cb.h"

  64. 

  65. /* block type, codes 000 .. 1xx */

  66. static vlc_code_t svq1_block_type_table[8] = {

  67.   { SVQ1_BLOCK_INTRA, 3 }, { SVQ1_BLOCK_INTER_4V, 3 },

  68.   { SVQ1_BLOCK_INTER, 2 }, { SVQ1_BLOCK_INTER,    2 },

  69.   { SVQ1_BLOCK_SKIP,  1 }, { SVQ1_BLOCK_SKIP,     1 },

  70.   { SVQ1_BLOCK_SKIP,  1 }, { SVQ1_BLOCK_SKIP,     1 }

  71. };

  72. 

  73. /* motion vector, codes 0000011 .. 011xxxx */

  74. static vlc_code_t svq1_motion_table_0[61] = {

  75.   { 7, 8 }, { 6, 8 }, { 5, 8 }, { 4, 7 }, { 4, 7 },

  76.   { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 },

  77.   { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },

  78.   { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },

  79.   { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  80.   { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  81.   { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  82.   { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }

  83. };

  84. 

  85. /* motion vector, codes 000000000010 ... 0000010111xx */

  86. static vlc_code_t svq1_motion_table_1[94] = {

  87.   {32, 13}, {31, 13}, {30, 12}, {30, 12}, {29, 12}, {29, 12},

  88.   {28, 12}, {28, 12}, {27, 12}, {27, 12}, {26, 12}, {26, 12}, {25, 12}, {25, 12},

  89.   {24, 11}, {24, 11}, {24, 11}, {24, 11}, {23, 11}, {23, 11}, {23, 11}, {23, 11},

  90.   {22, 11}, {22, 11}, {22, 11}, {22, 11}, {21, 11}, {21, 11}, {21, 11}, {21, 11},

  91.   {20, 11}, {20, 11}, {20, 11}, {20, 11}, {19, 11}, {19, 11}, {19, 11}, {19, 11},

  92.   {18, 11}, {18, 11}, {18, 11}, {18, 11}, {17, 11}, {17, 11}, {17, 11}, {17, 11},

  93.   {16, 11}, {16, 11}, {16, 11}, {16, 11}, {15, 11}, {15, 11}, {15, 11}, {15, 11},

  94.   {14, 11}, {14, 11}, {14, 11}, {14, 11}, {13, 11}, {13, 11}, {13, 11}, {13, 11},

  95.   {12, 11}, {12, 11}, {12, 11}, {12, 11}, {11, 11}, {11, 11}, {11, 11}, {11, 11},

  96.   {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10},

  97.   { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10},

  98.   { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10},

  99. };

  100. 

  101. /* inter-coded vector codebook count tables, codes 000000 ... 111111 */

  102. static vlc_code_t svq1_inter_vector_tables[6][64] = {

  103.   /* 4x2 vector, codes 0000xxx ... 11xxxxx */

  104.   { { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },

  105.     { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },

  106.     { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },

  107.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  108.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  109.     { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },

  110.     {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 },

  111.     {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 } },

  112. 

  113.   /* 4x4 vector, codes 0000xxx ... 11xxxxx */

  114.   { { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },

  115.     { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },

  116.     { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },

  117.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  118.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  119.     { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },

  120.     {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 },

  121.     {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 } },

  122. 

  123.   /* 8x4 vector, codes 00000xx ... 1xxxxxx */

  124.   { { 6, 5 }, { 6, 5 }, { 5, 5 }, { 5, 5 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },

  125.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },

  126.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  127.     { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },

  128.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  129.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  130.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  131.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } },

  132. 

  133.   /* 8x8 vector, codes 00000xx ... 1xxxxxx */

  134.   { { 6, 5 }, { 6, 5 }, { 5, 5 }, { 5, 5 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },

  135.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },

  136.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  137.     { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },

  138.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  139.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  140.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  141.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } },

  142. 

  143.   /* 16x8 vector, codes 00000xx ... 1xxxxxx */

  144.   { { 6, 5 }, { 6, 5 }, { 5, 5 }, { 5, 5 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },

  145.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },

  146.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  147.     { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },

  148.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  149.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  150.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  151.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } },

  152. 

  153.   /* 16x16 vector, codes 000000x ... 1xxxxxx */

  154.   { { 6, 6 }, { 5, 6 }, { 4, 5 }, { 4, 5 }, { 3, 5 }, { 3, 5 }, { 2, 5 }, { 2, 5 },

  155.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  156.     { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },

  157.     { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },

  158.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  159.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  160.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },

  161.     {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } }

  162. };

  163. 

  164. /* vector codebook count tables, codes 0000000 ... 1111111 */

  165. static vlc_code_t svq1_intra_vector_tables[6][128] = {

  166.   /* 4x2 vector, codes 00000xx ... 1xxxxxx */

  167.   { { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, {-1, 5 }, {-1, 5 }, {-1, 5 }, {-1, 5 },

  168.     { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 },

  169.     { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },

  170.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },

  171.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  172.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  173.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  174.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  175.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  176.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  177.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  178.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  179.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  180.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  181.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  182.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },

  183. 

  184.   /* 4x4 vector, codes 0000xxx ... 11xxxxx */

  185.   { { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },

  186.     {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 },

  187.     { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },

  188.     { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },

  189.     { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },

  190.     { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },

  191.     { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },

  192.     { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },

  193.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  194.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  195.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  196.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  197.     { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },

  198.     { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },

  199.     { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },

  200.     { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 } },

  201. 

  202.   /* 8x4 vector, codes 00000xx ... 1xxxxxx */

  203.   { { 2, 5 }, { 2, 5 }, { 2, 5 }, { 2, 5 }, {-1, 5 }, {-1, 5 }, {-1, 5 }, {-1, 5 },

  204.     { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 },

  205.     { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },

  206.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },

  207.     { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },

  208.     { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },

  209.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },

  210.     { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },  

  211.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  212.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  213.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  214.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  215.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  216.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  217.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  218.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },

  219. 

  220.   /* 8x8 vector, codes 000000x ... 1xxxxxx */

  221.   { { 2, 6 }, { 2, 6 }, {-1, 6 }, {-1, 6 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 },

  222.     { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 },

  223.     { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },

  224.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },

  225.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  226.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  227.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  228.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  229.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  230.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  231.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  232.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  233.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  234.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  235.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  236.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },

  237. 

  238.   /* 16x8 vector, codes 000000x ... 1xxxxxx */

  239.   { { 4, 6 }, { 4, 6 }, {-1, 6 }, {-1, 6 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 },

  240.     { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 2, 5 }, { 2, 5 }, { 2, 5 }, { 2, 5 },

  241.     { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },

  242.     { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },

  243.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  244.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  245.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  246.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  247.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  248.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  249.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  250.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  251.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  252.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  253.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  254.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },

  255. 

  256.   /* 16x16 vector, codes 0000000 ... 1xxxxxx */

  257.   { { 5, 7 }, {-1, 7 }, { 4, 6 }, { 4, 6 }, { 6, 5 }, { 6, 5 }, { 6, 5 }, { 6, 5 },

  258.     { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },

  259.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  260.     { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },

  261.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  262.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  263.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  264.     { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },

  265.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  266.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  267.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  268.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  269.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  270.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  271.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },

  272.     { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } }

  273. };

  274. 

  275. /* intra mean value, codes 00100101 ... 1111xxxx */

  276. static vlc_code_t svq1_intra_mean_table_0[219] = {

  277.   {135, 8 }, {136, 8 }, {165, 8 },

  278.   {134, 8 }, {129, 8 }, {164, 8 }, {163, 8 }, {133, 8 }, {162, 8 }, {174, 8 }, {175, 8 },

  279.   {161, 8 }, {160, 8 }, {159, 8 }, {158, 8 }, {157, 8 }, {156, 8 }, {155, 8 }, {154, 8 },

  280.   {153, 8 }, {151, 8 }, {152, 8 }, {132, 8 }, {110, 8 }, {131, 8 }, {108, 8 }, {130, 8 },

  281.   {166, 8 }, {105, 8 }, {104, 8 }, {103, 8 }, {127, 8 }, {101, 8 }, {167, 8 }, {168, 8 },

  282.   { 98, 8 }, {128, 8 }, { 48, 8 }, { 95, 8 }, { 62, 8 }, { 93, 8 }, { 92, 8 }, { 91, 8 },

  283.   { 90, 8 }, { 89, 8 }, { 60, 8 }, { 87, 8 }, { 86, 8 }, { 57, 8 }, { 84, 8 }, { 83, 8 },

  284.   { 82, 8 }, { 81, 8 }, { 80, 8 }, { 79, 8 }, { 78, 8 }, { 77, 8 }, { 76, 8 }, { 75, 8 },

  285.   { 74, 8 }, { 73, 8 }, { 72, 8 }, { 71, 8 }, { 70, 8 }, { 69, 8 }, { 68, 8 }, { 67, 8 },

  286.   { 66, 8 }, { 65, 8 }, { 56, 8 }, { 63, 8 }, { 23, 8 }, { 61, 8 }, { 30, 8 }, { 59, 8 },

  287.   { 58, 8 }, { 52, 8 }, { 29, 8 }, { 55, 8 }, { 54, 8 }, { 53, 8 }, { 50, 8 }, { 51, 8 },

  288.   { 22, 8 }, { 49, 8 }, { 85, 7 }, { 85, 7 }, { 97, 7 }, { 97, 7 }, { 88, 7 }, { 88, 7 },

  289.   { 64, 7 }, { 64, 7 }, { 94, 7 }, { 94, 7 }, {106, 7 }, {106, 7 }, {107, 7 }, {107, 7 },

  290.   {109, 7 }, {109, 7 }, {111, 7 }, {111, 7 }, {112, 7 }, {112, 7 }, {113, 7 }, {113, 7 },

  291.   {114, 7 }, {114, 7 }, {115, 7 }, {115, 7 }, {116, 7 }, {116, 7 }, {117, 7 }, {117, 7 },

  292.   {118, 7 }, {118, 7 }, {119, 7 }, {119, 7 }, {120, 7 }, {120, 7 }, { 99, 7 }, { 99, 7 },

  293.   {102, 7 }, {102, 7 }, { 28, 7 }, { 28, 7 }, {100, 7 }, {100, 7 }, { 96, 7 }, { 96, 7 },

  294.   {139, 7 }, {139, 7 }, { 24, 7 }, { 24, 7 }, {  1, 7 }, {  1, 7 }, {138, 7 }, {138, 7 },

  295.   {121, 7 }, {121, 7 }, {122, 7 }, {122, 7 }, {123, 7 }, {123, 7 }, {124, 7 }, {124, 7 },

  296.   {125, 7 }, {125, 7 }, {126, 7 }, {126, 7 }, {137, 7 }, {137, 7 }, {140, 7 }, {140, 7 },

  297.   {150, 7 }, {150, 7 }, {144, 7 }, {144, 7 }, {141, 7 }, {141, 7 }, {142, 7 }, {142, 7 },

  298.   {143, 7 }, {143, 7 }, {145, 7 }, {145, 7 }, {147, 7 }, {147, 7 }, {146, 7 }, {146, 7 },

  299.   { 27, 6 }, { 27, 6 }, { 27, 6 }, { 27, 6 }, {148, 6 }, {148, 6 }, {148, 6 }, {148, 6 },

  300.   {149, 6 }, {149, 6 }, {149, 6 }, {149, 6 }, {  0, 6 }, {  0, 6 }, {  0, 6 }, {  0, 6 },

  301.   { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 },

  302.   { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 },

  303.   { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 },

  304.   { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }

  305. };

  306. 

  307. /* intra mean value, codes 0000001101 ... 001001001x */

  308. static vlc_code_t svq1_intra_mean_table_1[135] = {

  309.   {218, 10}, {219, 10}, {220, 10},

  310.   {221, 10}, {222, 10}, {217, 10}, {230, 10}, {215, 10}, {208, 10}, {207, 10}, {206, 10},

  311.   {214, 10}, {204, 10}, {223, 10}, {224, 10}, {225, 10}, {226, 10}, {227, 10}, {228, 10},

  312.   {229, 10}, {213, 10}, {212, 10}, {231, 10}, {232, 10}, {211, 10}, {210, 10}, {236, 10},

  313.   {209, 10}, {216, 10}, {205, 10}, { 18, 10}, {186, 9 }, {186, 9 }, {185, 9 }, {185, 9 },

  314.   {184, 9 }, {184, 9 }, {182, 9 }, {182, 9 }, {183, 9 }, {183, 9 }, {180, 9 }, {180, 9 },

  315.   {181, 9 }, {181, 9 }, {178, 9 }, {178, 9 }, {187, 9 }, {187, 9 }, {176, 9 }, {176, 9 },

  316.   {188, 9 }, {188, 9 }, {179, 9 }, {179, 9 }, {173, 9 }, {173, 9 }, {172, 9 }, {172, 9 },

  317.   {171, 9 }, {171, 9 }, {170, 9 }, {170, 9 }, {169, 9 }, {169, 9 }, {189, 9 }, {189, 9 },

  318.   {190, 9 }, {190, 9 }, {191, 9 }, {191, 9 }, {192, 9 }, {192, 9 }, {193, 9 }, {193, 9 },

  319.   {194, 9 }, {194, 9 }, {195, 9 }, {195, 9 }, {196, 9 }, {196, 9 }, {197, 9 }, {197, 9 },

  320.   {198, 9 }, {198, 9 }, {200, 9 }, {200, 9 }, {201, 9 }, {201, 9 }, {202, 9 }, {202, 9 },

  321.   {203, 9 }, {203, 9 }, {199, 9 }, {199, 9 }, {177, 9 }, {177, 9 }, { 40, 9 }, { 40, 9 },

  322.   { 39, 9 }, { 39, 9 }, { 38, 9 }, { 38, 9 }, { 37, 9 }, { 37, 9 }, { 36, 9 }, { 36, 9 },

  323.   { 35, 9 }, { 35, 9 }, { 34, 9 }, { 34, 9 }, { 33, 9 }, { 33, 9 }, { 32, 9 }, { 32, 9 },

  324.   { 31, 9 }, { 31, 9 }, { 21, 9 }, { 21, 9 }, { 11, 9 }, { 11, 9 }, { 41, 9 }, { 41, 9 },

  325.   { 45, 9 }, { 45, 9 }, { 44, 9 }, { 44, 9 }, { 42, 9 }, { 42, 9 }, { 43, 9 }, { 43, 9 },

  326.   { 47, 9 }, { 47, 9 }, { 46, 9 }, { 46, 9 }

  327. };

  328. 

  329. /* intra mean value, codes 00000000000001 ... 00000011001xxx */

  330. static vlc_code_t svq1_intra_mean_table_2[207] = {

  331.   {255, 14}, { 14, 14}, { 13, 14}, { 17, 12}, { 17, 12}, { 17, 12}, { 17, 12},

  332.   {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11},

  333.   {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11},

  334.   {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11},

  335.   {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11},

  336.   {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11},

  337.   {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11},

  338.   {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11},

  339.   {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11},

  340.   {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11},

  341.   {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11},

  342.   {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11},

  343.   { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11},

  344.   {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11},

  345.   {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11},

  346.   {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11},

  347.   {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11},

  348.   {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11},

  349.   {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11},

  350.   {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11},

  351.   { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11},

  352.   { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11},

  353.   {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11},

  354.   {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11},

  355.   { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11},

  356.   {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}

  357. };

  358. 

  359. /* intra mean value, codes 00000000000000000000 ... 000000000000001xxxxx */

  360. static vlc_code_t svq1_intra_mean_table_3[64] = {

  361.   {  6, 20}, {  3, 20}, {  4, 20}, {  5, 20}, {  7, 20}, {  8, 20}, {  9, 19}, {  9, 19},

  362.   {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17},

  363.   { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16},

  364.   { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16},

  365.   { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15},

  366.   { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15},

  367.   { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15},

  368.   { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}

  369. };

  370. 

  371. /* inter mean value, codes 00001011 ... 1xxxxxxx */

  372. static vlc_code_t svq1_inter_mean_table_0[245] = {

  373.   { 10, 8 }, { 12, 8 }, { 11, 8 }, {-11, 8 }, {-12, 8 },

  374.   {-10, 8 }, { -9, 8 }, { -7, 7 }, { -7, 7 }, { -6, 7 }, { -6, 7 }, {  8, 7 }, {  8, 7 },

  375.   { -8, 7 }, { -8, 7 }, {  9, 7 }, {  9, 7 }, {  6, 7 }, {  6, 7 }, {  7, 7 }, {  7, 7 },

  376.   { -5, 6 }, { -5, 6 }, { -5, 6 }, { -5, 6 }, { -4, 6 }, { -4, 6 }, { -4, 6 }, { -4, 6 },

  377.   {  5, 6 }, {  5, 6 }, {  5, 6 }, {  5, 6 }, {  4, 6 }, {  4, 6 }, {  4, 6 }, {  4, 6 },

  378.   {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 },

  379.   {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 },

  380.   { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 },

  381.   { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 },

  382.   { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 },

  383.   { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 },

  384.   {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },

  385.   {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },

  386.   {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },

  387.   {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },

  388.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  389.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  390.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  391.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  392.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  393.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  394.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  395.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  396.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  397.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  398.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  399.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  400.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  401.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  402.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },

  403.   {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }

  404. };

  405. 

  406. /* inter mean value, codes 000000010010 ... 00001011xxxx */

  407. static vlc_code_t svq1_inter_mean_table_1[158] = {

  408.   {-30, 12}, {-31, 12}, {-32, 12}, {-33, 12}, { 31, 12}, {-34, 12},

  409.   {-35, 12}, { 29, 12}, { 30, 12}, { 33, 12}, { 34, 12}, { 32, 12}, {-29, 11}, {-29, 11},

  410.   {-28, 11}, {-28, 11}, { 28, 11}, { 28, 11}, {-27, 11}, {-27, 11}, {-26, 11}, {-26, 11},

  411.   { 27, 11}, { 27, 11}, { 26, 11}, { 26, 11}, { 25, 11}, { 25, 11}, { 24, 11}, { 24, 11},

  412.   { 23, 11}, { 23, 11}, { 22, 11}, { 22, 11}, {-24, 11}, {-24, 11}, {-25, 11}, {-25, 11},

  413.   {-23, 10}, {-23, 10}, {-23, 10}, {-23, 10}, {-21, 10}, {-21, 10}, {-21, 10}, {-21, 10},

  414.   {-20, 10}, {-20, 10}, {-20, 10}, {-20, 10}, {-19, 10}, {-19, 10}, {-19, 10}, {-19, 10},

  415.   {-18, 10}, {-18, 10}, {-18, 10}, {-18, 10}, {-22, 10}, {-22, 10}, {-22, 10}, {-22, 10},

  416.   { 19, 10}, { 19, 10}, { 19, 10}, { 19, 10}, { 21, 10}, { 21, 10}, { 21, 10}, { 21, 10},

  417.   { 20, 10}, { 20, 10}, { 20, 10}, { 20, 10}, { 18, 10}, { 18, 10}, { 18, 10}, { 18, 10},

  418.   {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 },

  419.   {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 },

  420.   { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 },

  421.   { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 },

  422.   { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 },

  423.   { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 },

  424.   { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 },

  425.   {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 },

  426.   {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 },

  427.   {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }

  428. };

  429. 

  430. /* inter mean value, codes 000000000010111 ... 0000000100011xx */

  431. static vlc_code_t svq1_inter_mean_table_2[121] = {

  432.   { 61, 15},

  433.   { 52, 15}, { 58, 15}, {-56, 15}, {-57, 15}, { 59, 15}, {-55, 15}, { 60, 15}, {-54, 15},

  434.   { 53, 15}, {-62, 15}, {-60, 15}, {-59, 15}, {-58, 15}, { 57, 15}, { 56, 15}, {-53, 15},

  435.   { 55, 15}, { 54, 15}, { 50, 14}, { 50, 14}, { 45, 14}, { 45, 14}, {-52, 14}, {-52, 14},

  436.   {-51, 14}, {-51, 14}, {-50, 14}, {-50, 14}, { 46, 14}, { 46, 14}, {-49, 14}, {-49, 14},

  437.   {-48, 14}, {-48, 14}, { 48, 14}, { 48, 14}, {-47, 14}, {-47, 14}, { 49, 14}, { 49, 14},

  438.   {-45, 14}, {-45, 14}, {-44, 14}, {-44, 14}, { 47, 14}, { 47, 14}, { 51, 14}, { 51, 14},

  439.   { 44, 14}, { 44, 14}, {-46, 14}, {-46, 14}, {-43, 13}, {-43, 13}, {-43, 13}, {-43, 13},

  440.   {-42, 13}, {-42, 13}, {-42, 13}, {-42, 13}, {-41, 13}, {-41, 13}, {-41, 13}, {-41, 13},

  441.   {-40, 13}, {-40, 13}, {-40, 13}, {-40, 13}, {-39, 13}, {-39, 13}, {-39, 13}, {-39, 13},

  442.   {-38, 13}, {-38, 13}, {-38, 13}, {-38, 13}, {-37, 13}, {-37, 13}, {-37, 13}, {-37, 13},

  443.   {-36, 13}, {-36, 13}, {-36, 13}, {-36, 13}, { 42, 13}, { 42, 13}, { 42, 13}, { 42, 13},

  444.   { 36, 13}, { 36, 13}, { 36, 13}, { 36, 13}, { 43, 13}, { 43, 13}, { 43, 13}, { 43, 13},

  445.   { 41, 13}, { 41, 13}, { 41, 13}, { 41, 13}, { 40, 13}, { 40, 13}, { 40, 13}, { 40, 13},

  446.   { 35, 13}, { 35, 13}, { 35, 13}, { 35, 13}, { 39, 13}, { 39, 13}, { 39, 13}, { 39, 13},

  447.   { 38, 13}, { 38, 13}, { 38, 13}, { 38, 13}, { 37, 13}, { 37, 13}, { 37, 13}, { 37, 13}

  448. };

  449. 

  450. /* inter mean value, codes 000000000000100101 ... 0000000000101101xx */

  451. static vlc_code_t svq1_inter_mean_table_3[147] = {

  452.   {111, 18}, {102, 18}, { 99, 18},

  453.   {-86, 18}, { 97, 18}, {-97, 18}, { 96, 18}, {-95, 18}, {-76, 18}, {-77, 18}, {-78, 18},

  454.   {-85, 18}, {-80, 18}, {-81, 18}, { 89, 18}, { 90, 18}, {-84, 18}, {-89, 18}, { 80, 18},  

  455.   {-90, 18}, {-88, 18}, { 92, 18}, { 93, 18}, { 95, 18}, {-109,18}, {-79, 17}, {-79, 17},

  456.   {-83, 17}, {-83, 17}, {-75, 17}, {-75, 17}, {-74, 17}, {-74, 17}, {-73, 17}, {-73, 17},

  457.   {-72, 17}, {-72, 17}, { 87, 17}, { 87, 17}, { 86, 17}, { 86, 17}, { 75, 17}, { 75, 17},

  458.   { 85, 17}, { 85, 17}, { 84, 17}, { 84, 17}, { 81, 17}, { 81, 17}, { 79, 17}, { 79, 17},

  459.   { 74, 17}, { 74, 17}, { 72, 17}, { 72, 17}, { 82, 17}, { 82, 17}, { 78, 17}, { 78, 17},

  460.   { 83, 17}, { 83, 17}, { 76, 17}, { 76, 17}, { 73, 17}, { 73, 17}, { 77, 17}, { 77, 17},

  461.   { 70, 16}, { 70, 16}, { 70, 16}, { 70, 16}, { 69, 16}, { 69, 16}, { 69, 16}, { 69, 16},

  462.   { 64, 16}, { 64, 16}, { 64, 16}, { 64, 16}, {-68, 16}, {-68, 16}, {-68, 16}, {-68, 16},

  463.   {-66, 16}, {-66, 16}, {-66, 16}, {-66, 16}, { 68, 16}, { 68, 16}, { 68, 16}, { 68, 16},

  464.   {-69, 16}, {-69, 16}, {-69, 16}, {-69, 16}, { 65, 16}, { 65, 16}, { 65, 16}, { 65, 16},

  465.   { 71, 16}, { 71, 16}, { 71, 16}, { 71, 16}, {-70, 16}, {-70, 16}, {-70, 16}, {-70, 16},

  466.   {-65, 16}, {-65, 16}, {-65, 16}, {-65, 16}, {-67, 16}, {-67, 16}, {-67, 16}, {-67, 16},

  467.   {-63, 16}, {-63, 16}, {-63, 16}, {-63, 16}, {-71, 16}, {-71, 16}, {-71, 16}, {-71, 16},

  468.   { 67, 16}, { 67, 16}, { 67, 16}, { 67, 16}, {-61, 16}, {-61, 16}, {-61, 16}, {-61, 16},

  469.   {-64, 16}, {-64, 16}, {-64, 16}, {-64, 16}, { 63, 16}, { 63, 16}, { 63, 16}, { 63, 16},

  470.   { 62, 16}, { 62, 16}, { 62, 16}, { 62, 16}, { 66, 16}, { 66, 16}, { 66, 16}, { 66, 16}

  471. };

  472. 

  473. /* inter mean value, codes 00000000000001001001 ... 0000000000001001001x */

  474. static vlc_code_t svq1_inter_mean_table_4[75] = {

  475.   {142, 20}, {135, 20}, {125, 20}, {123, 20}, {122, 20}, {119, 20}, {117, 20},

  476.   {113, 20}, {104, 20}, {103, 20}, {-120,20}, {-114,20}, {-108,20}, {-104,20}, {-102,20},

  477.   {-101,20}, {-93, 20}, {-91, 19}, {-91, 19}, {-96, 19}, {-96, 19}, { 88, 19}, { 88, 19},

  478.   { 91, 19}, { 91, 19}, { 94, 19}, { 94, 19}, {121, 19}, {121, 19}, {120, 19}, {120, 19},

  479.   {-110,19}, {-110,19}, {118, 19}, {118, 19}, {115, 19}, {115, 19}, {114, 19}, {114, 19},

  480.   {112, 19}, {112, 19}, {107, 19}, {107, 19}, {110, 19}, {110, 19}, {109, 19}, {109, 19},

  481.   {108, 19}, {108, 19}, {-103,19}, {-103,19}, {106, 19}, {106, 19}, {105, 19}, {105, 19},

  482.   {-100,19}, {-100,19}, {101, 19}, {101, 19}, {100, 19}, {100, 19}, {-99, 19}, {-99, 19},

  483.   {-82, 19}, {-82, 19}, {-87, 19}, {-87, 19}, {-94, 19}, {-94, 19}, {-98, 19}, {-98, 19},

  484.   { 98, 19}, { 98, 19}, {-92, 19}, {-92, 19}

  485. };

  486. 

  487. /* inter mean value, codes 0000000000000000000000 ... 000000000000010010001x */

  488. static vlc_code_t svq1_inter_mean_table_5[292] = {

  489.   {255, 22}, {254, 22}, {253, 22}, {252, 22}, {251, 22}, {250, 22}, {249, 22}, {248, 22},

  490.   {247, 22}, {246, 22}, {245, 22}, {244, 22}, {243, 22}, {242, 22}, {241, 22}, {240, 22},

  491.   {239, 22}, {238, 22}, {237, 22}, {236, 22}, {235, 22}, {234, 22}, {233, 22}, {232, 22},

  492.   {231, 22}, {230, 22}, {229, 22}, {228, 22}, {227, 22}, {226, 22}, {225, 22}, {224, 22},

  493.   {223, 22}, {222, 22}, {221, 22}, {220, 22}, {219, 22}, {218, 22}, {217, 22}, {216, 22},

  494.   {215, 22}, {214, 22}, {213, 22}, {212, 22}, {211, 22}, {210, 22}, {209, 22}, {208, 22},

  495.   {207, 22}, {206, 22}, {205, 22}, {204, 22}, {203, 22}, {202, 22}, {201, 22}, {200, 22},

  496.   {199, 22}, {198, 22}, {197, 22}, {196, 22}, {195, 22}, {194, 22}, {193, 22}, {192, 22},

  497.   {191, 22}, {190, 22}, {189, 22}, {188, 22}, {187, 22}, {186, 22}, {185, 22}, {184, 22},

  498.   {183, 22}, {182, 22}, {181, 22}, {180, 22}, {179, 22}, {178, 22}, {177, 22}, {176, 22},

  499.   {175, 22}, {174, 22}, {173, 22}, {172, 22}, {171, 22}, {170, 22}, {169, 22}, {168, 22},

  500.   {167, 22}, {166, 22}, {-256,22}, {164, 22}, {-211,22}, {162, 22}, {161, 22}, {160, 22},

  501.   {-210,22}, {-168,22}, {157, 22}, {156, 22}, {155, 22}, {154, 22}, {153, 22}, {152, 22},

  502.   {151, 22}, {150, 22}, {149, 22}, {148, 22}, {147, 22}, {146, 22}, {145, 22}, {144, 22},

  503.   {143, 22}, {-208,22}, {141, 22}, {140, 22}, {139, 22}, {-200,22}, {137, 22}, {136, 22},

  504.   {-198,22}, {134, 22}, {133, 22}, {-196,22}, {-201,22}, {130, 22}, {129, 22}, {128, 22},

  505.   {127, 22}, {126, 22}, {-195,22}, {124, 22}, {-167,22}, {-166,22}, {-165,22}, {-164,22},

  506.   {-163,22}, {-162,22}, {-161,22}, {-180,22}, {-160,22}, {-159,22}, {-158,22}, {-157,22},

  507.   {-156,22}, {-155,22}, {-154,22}, {-153,22}, {-152,22}, {-151,22}, {-150,22}, {-149,22},

  508.   {-148,22}, {-147,22}, {-146,22}, {-145,22}, {-144,22}, {-143,22}, {-142,22}, {-141,22},

  509.   {-140,22}, {-139,22}, {-138,22}, {-137,22}, {-136,22}, {-135,22}, {-134,22}, {-133,22},

  510.   {-132,22}, {-131,22}, {-130,22}, {-129,22}, {-126,22}, {-125,22}, {-124,22}, {-123,22},

  511.   {-122,22}, {-121,22}, {-118,22}, {-116,22}, {-115,22}, {-113,22}, {-112,22}, {-107,22},

  512.   {-106,22}, {-169,22}, {-170,22}, {-171,22}, {-172,22}, {-173,22}, {-174,22}, {-175,22},

  513.   {-176,22}, {-177,22}, {-178,22}, {-187,22}, {-179,22}, {-181,22}, {-182,22}, {-183,22},

  514.   {-184,22}, {-185,22}, {-186,22}, {-235,22}, {-188,22}, {-189,22}, {-190,22}, {-191,22},

  515.   {-192,22}, {-193,22}, {-194,22}, {-197,22}, {-255,22}, {-254,22}, {-253,22}, {-252,22},

  516.   {-251,22}, {-250,22}, {-249,22}, {-248,22}, {-247,22}, {-246,22}, {-245,22}, {-244,22},

  517.   {-243,22}, {-242,22}, {-241,22}, {-240,22}, {-239,22}, {-238,22}, {-237,22}, {-232,22},

  518.   {-236,22}, {-234,22}, {-233,22}, {-217,22}, {-231,22}, {-230,22}, {-229,22}, {-228,22},

  519.   {-227,22}, {-226,22}, {-225,22}, {-224,22}, {-223,22}, {-222,22}, {-221,22}, {-220,22},

  520.   {-219,22}, {-216,22}, {-202,22}, {-205,22}, {-215,22}, {-214,22}, {-213,22}, {-204,22},

  521.   {-212,22}, {-209,22}, {-218,22}, {-199,22}, {-207,22}, {-206,22}, {165, 21}, {165, 21},

  522.   {131, 21}, {131, 21}, {163, 21}, {163, 21}, {-203,21}, {-203,21}, {116, 21}, {116, 21},

  523.   {159, 21}, {159, 21}, {138, 21}, {138, 21}, {158, 21}, {158, 21}, {-105,21}, {-105,21},

  524.   {-111,21}, {-111,21}, {132, 21}, {132, 21}, {128, 21}, {128, 21}, {-127,21}, {-127,21},

  525.   {-119,21}, {-119,21}, {-117,21}, {-117,21}

  526. };

  527. 

  528. #define SVQ1_PROCESS_VECTOR()\

  529.     for (; level > 0; i++) {\

  530.       /* process next depth */\

  531.       if (i == m) {\

  532. 	m = n;\

  533. 	if (--level == 0)\

  534. 	  break;\

  535.       }\

  536.       /* divide block if next bit set */\

  537.       if (get_bits (bitbuf, 1) == 0)\

  538. 	break;\

  539.       /* add child nodes */\

  540.       list[n++] = list[i];\

  541.       list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level / 2) + 1));\

  542.     }

  543. 

  544. #define SVQ1_ADD_CODEBOOK()\

  545. 	  /* add codebook entries to vector */\

  546. 	  for (j=0; j < stages; j++) {\

  547. 	    n3  = codebook[entries[j]] ^ 0x80808080;\

  548. 	    n1 += ((n3 & 0xFF00FF00) >> 8);\

  549. 	    n2 +=  (n3 & 0x00FF00FF);\

  550. 	  }\

  551. \

  552. 	  /* clip to [0..255] */\

  553. 	  if (n1 & 0xFF00FF00) {\

  554. 	    n3  = ((( n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  555. 	    n1 += 0x7F007F00;\

  556. 	    n1 |= (((~n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  557. 	    n1 &= (n3 & 0x00FF00FF);\

  558. 	  }\

  559. \

  560. 	  if (n2 & 0xFF00FF00) {\

  561. 	    n3  = ((( n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  562. 	    n2 += 0x7F007F00;\

  563. 	    n2 |= (((~n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\

  564. 	    n2 &= (n3 & 0x00FF00FF);\

  565. 	  }

  566. 

  567. #define SVQ1_DO_CODEBOOK_INTRA()\

  568.       for (y=0; y < height; y++) {\

  569. 	for (x=0; x < (width / 4); x++, codebook++) {\

  570. 	n1 = n4;\

  571. 	n2 = n4;\

  572. 	SVQ1_ADD_CODEBOOK()\

  573. 	/* store result */\

  574. 	dst[x] = (n1 << 8) | n2;\

  575. 	}\

  576. 	dst += (pitch / 4);\

  577.       }

  578. 

  579. #define SVQ1_DO_CODEBOOK_NONINTRA()\

  580.       for (y=0; y < height; y++) {\

  581. 	for (x=0; x < (width / 4); x++, codebook++) {\

  582. 	n3 = dst[x];\

  583. 	/* add mean value to vector */\

  584. 	n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\

  585. 	n2 =  (n3 & 0x00FF00FF)	  + n4;\

  586. 	SVQ1_ADD_CODEBOOK()\

  587. 	/* store result */\

  588. 	dst[x] = (n1 << 8) | n2;\

  589. 	}\

  590. 	dst += (pitch / 4);\

  591.       }

  592. 

  593. #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\

  594.       codebook = (const uint32_t *) cbook[level];\

  595.       bit_cache = get_bits (bitbuf, 4*stages);\

  596.       /* calculate codebook entries for this vector */\

  597.       for (j=0; j < stages; j++) {\

  598. 	entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\

  599.       }\

  600.       mean -= (stages * 128);\

  601.       n4    = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF);

  602. 

  603. static int svq1_decode_block_intra (bit_buffer_t *bitbuf, uint8_t *pixels, int pitch ) {

  604.   uint32_t    bit_cache;

  605.   vlc_code_t *vlc;

  606.   uint8_t    *list[63];

  607.   uint32_t   *dst;

  608.   const uint32_t *codebook;

  609.   int	      entries[6];

  610.   int	      i, j, m, n;

  611.   int	      mean, stages;

  612.   unsigned    x, y, width, height, level;

  613.   uint32_t    n1, n2, n3, n4;

  614. 

  615.   /* initialize list for breadth first processing of vectors */

  616.   list[0] = pixels;

  617. 

  618.   /* recursively process vector */

  619.   for (i=0, m=1, n=1, level=5; i < n; i++) {

  620.     SVQ1_PROCESS_VECTOR();

  621. 

  622.     /* destination address and vector size */

  623.     dst = (uint32_t *) list[i];

  624.     width = 1 << ((4 + level) /2);

  625.     height = 1 << ((3 + level) /2);

  626. 

  627.     /* get number of stages (-1 skips vector, 0 for mean only) */

  628.     bit_cache = get_bit_cache (bitbuf);

  629. 

  630.     vlc = &svq1_intra_vector_tables[level][bit_cache >> (32 - 7)];

  631. 

  632.     /* flush bits */

  633.     stages	    = vlc->value;

  634.     skip_bits(bitbuf,vlc->length);

  635. 

  636.     if (stages == -1) {

  637. 	for (y=0; y < height; y++) {

  638. 	  memset (&dst[y*(pitch / 4)], 0, width);

  639. 	}

  640.       continue;		/* skip vector */

  641.     }

  642. 

  643.     if ((stages > 0) && (level >= 4)) {

  644. #ifdef DEBUG_SVQ1

  645.     printf("Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",stages,level);

  646. #endif

  647.       return -1;	/* invalid vector */

  648.     }

  649. 

  650.     /* get mean value for vector */

  651.     bit_cache = get_bit_cache (bitbuf);

  652. 

  653.     if (bit_cache >= 0x25000000)

  654. 	vlc = &svq1_intra_mean_table_0[(bit_cache >> (32 - 8)) - 37];

  655.     else if (bit_cache >= 0x03400000)

  656. 	vlc = &svq1_intra_mean_table_1[(bit_cache >> (32 - 10)) - 13];

  657.     else if (bit_cache >= 0x00040000) 

  658. 	vlc = &svq1_intra_mean_table_2[(bit_cache >> (32 - 14)) - 1];

  659.     else

  660. 	vlc = &svq1_intra_mean_table_3[bit_cache >> (32 - 20)];

  661. 

  662.     /* flush bits */

  663.     mean	    = vlc->value;

  664.     skip_bits(bitbuf,vlc->length);

  665. 

  666.     if (stages == 0) {

  667.       for (y=0; y < height; y++) {

  668. 	memset (&dst[y*(pitch / 4)], mean, width);

  669.       }

  670.     } else {

  671.       SVQ1_CALC_CODEBOOK_ENTRIES(svq1_intra_codebooks);

  672.       SVQ1_DO_CODEBOOK_INTRA()

  673.     }

  674.   }

  675. 

  676.   return 0;

  677. }

  678. 

  679. static int svq1_decode_block_non_intra (bit_buffer_t *bitbuf, uint8_t *pixels, int pitch ) {

  680.   uint32_t    bit_cache;

  681.   vlc_code_t *vlc;

  682.   uint8_t    *list[63];

  683.   uint32_t   *dst;

  684.   const uint32_t *codebook;

  685.   int	      entries[6];

  686.   int	      i, j, m, n;

  687.   int	      mean, stages;

  688.   int	      x, y, width, height, level;

  689.   uint32_t    n1, n2, n3, n4;

  690. 

  691.   /* initialize list for breadth first processing of vectors */

  692.   list[0] = pixels;

  693. 

  694.   /* recursively process vector */

  695.   for (i=0, m=1, n=1, level=5; i < n; i++) {

  696.     SVQ1_PROCESS_VECTOR();

  697. 

  698.     /* destination address and vector size */

  699.     dst = (uint32_t *) list[i];

  700.     width = 1 << ((4 + level) /2);

  701.     height = 1 << ((3 + level) /2);

  702. 

  703.     /* get number of stages (-1 skips vector, 0 for mean only) */

  704.     bit_cache = get_bit_cache (bitbuf);

  705. 

  706.     vlc = &svq1_inter_vector_tables[level][bit_cache >> (32 - 6)];

  707. 

  708.     /* flush bits */

  709.     stages	    = vlc->value;

  710.     skip_bits(bitbuf,vlc->length);

  711. 

  712.     if (stages == -1) continue;	/* skip vector */

  713. 

  714.     if ((stages > 0) && (level >= 4)) {

  715. #ifdef DEBUG_SVQ1

  716.     printf("Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",stages,level);

  717. #endif

  718.       return -1;	/* invalid vector */

  719.     }

  720. 

  721.     /* get mean value for vector */

  722.     bit_cache = get_bit_cache (bitbuf);

  723. 

  724.     if (bit_cache >= 0x0B000000)

  725. 	vlc = &svq1_inter_mean_table_0[(bit_cache >> (32 - 8)) - 11];

  726.     else if (bit_cache >= 0x01200000)

  727. 	vlc = &svq1_inter_mean_table_1[(bit_cache >> (32 - 12)) - 18];

  728.     else if (bit_cache >= 0x002E0000) 

  729. 	vlc = &svq1_inter_mean_table_2[(bit_cache >> (32 - 15)) - 23];

  730.     else if (bit_cache >= 0x00094000)

  731. 	vlc = &svq1_inter_mean_table_3[(bit_cache >> (32 - 18)) - 37];

  732.     else if (bit_cache >= 0x00049000)

  733. 	vlc = &svq1_inter_mean_table_4[(bit_cache >> (32 - 20)) - 73];

  734.     else

  735. 	vlc = &svq1_inter_mean_table_5[bit_cache >> (32 - 22)];

  736. 

  737.     /* flush bits */

  738.     mean	    = vlc->value;

  739.     skip_bits(bitbuf,vlc->length);

  740. 

  741.     SVQ1_CALC_CODEBOOK_ENTRIES(svq1_inter_codebooks);

  742.     SVQ1_DO_CODEBOOK_NONINTRA()

  743.   }

  744.   return 0;

  745. }

  746. 

  747. static int svq1_decode_motion_vector (bit_buffer_t *bitbuf, svq1_pmv_t *mv, svq1_pmv_t **pmv) {

  748.   uint32_t    bit_cache;

  749.   vlc_code_t *vlc;

  750.   int	      diff, sign;

  751.   int	      i;

  752. 

  753.   for (i=0; i < 2; i++) {

  754. 

  755.     /* get motion code */

  756.     bit_cache = get_bit_cache (bitbuf);

  757. 

  758.     if (!(bit_cache & 0xFFE00000))

  759.       return -1;	/* invalid vlc code */

  760. 

  761.     if (bit_cache & 0x80000000) {

  762.       diff = 0;

  763. 

  764.       /* flush bit */

  765.       skip_bits(bitbuf,1);

  766. 

  767.     } else {

  768.       if (bit_cache >= 0x06000000) {

  769.         vlc = &svq1_motion_table_0[(bit_cache >> (32 - 7)) - 3];

  770.       } else {

  771.         vlc = &svq1_motion_table_1[(bit_cache >> (32 - 12)) - 2];

  772.       }

  773. 

  774.       /* decode motion vector differential */

  775.       sign = (int) (bit_cache << (vlc->length - 1)) >> 31;

  776.       diff = (vlc->value ^ sign) - sign;

  777. 

  778.       /* flush bits */

  779.       skip_bits(bitbuf,vlc->length);

  780.     }

  781. 

  782.     /* add median of motion vector predictors and clip result */

  783.     if (i == 1)

  784.       mv->y = ((diff + MEDIAN(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26;

  785.     else

  786.       mv->x = ((diff + MEDIAN(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26;

  787.   }

  788. 

  789.   return 0;

  790. }

  791. 

  792. static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y) {

  793.   uint8_t *src;

  794.   uint8_t *dst;

  795.   int	   i;

  796. 

  797.   src = &previous[x + y*pitch];

  798.   dst = current;

  799. 

  800.   for (i=0; i < 16; i++) {

  801.     memcpy (dst, src, 16);

  802.     src += pitch;

  803.     dst += pitch;

  804.   }

  805. }

  806. 

  807. static int svq1_motion_inter_block (MpegEncContext *s, bit_buffer_t *bitbuf,

  808. 			       uint8_t *current, uint8_t *previous, int pitch,

  809. 			       svq1_pmv_t *motion, int x, int y) {

  810.   uint8_t    *src;

  811.   uint8_t    *dst;

  812.   svq1_pmv_t  mv;

  813.   svq1_pmv_t *pmv[3];

  814.   int	      result;

  815. 

  816.   /* predict and decode motion vector */

  817.   pmv[0] = &motion[0];

  818.   if (y == 0) {

  819.     pmv[1] =

  820.     pmv[2] = pmv[0];

  821.   }

  822.   else {

  823.     pmv[1] = &motion[(x / 8) + 2];

  824.     pmv[2] = &motion[(x / 8) + 4];

  825.   }

  826. 

  827.   result = svq1_decode_motion_vector (bitbuf, &mv, pmv);

  828. 

  829.   if (result != 0)

  830.     return result;

  831. 

  832.   motion[0].x		=

  833.   motion[(x / 8) + 2].x	=

  834.   motion[(x / 8) + 3].x	= mv.x;

  835.   motion[0].y		=

  836.   motion[(x / 8) + 2].y	=

  837.   motion[(x / 8) + 3].y	= mv.y;

  838. 

  839.   src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1))*pitch];

  840.   dst = current;

  841. 

  842.   s->dsp.put_pixels_tab[0][((mv.y & 1) << 1) | (mv.x & 1)](dst,src,pitch,16);

  843. 

  844.   return 0;

  845. }

  846. 

  847. static int svq1_motion_inter_4v_block (MpegEncContext *s, bit_buffer_t *bitbuf,

  848. 				  uint8_t *current, uint8_t *previous, int pitch,

  849. 				  svq1_pmv_t *motion,int x, int y) {

  850.   uint8_t    *src;

  851.   uint8_t    *dst;

  852.   svq1_pmv_t  mv;

  853.   svq1_pmv_t *pmv[4];

  854.   int	      i, result;

  855. 

  856.   /* predict and decode motion vector (0) */

  857.   pmv[0] = &motion[0];

  858.   if (y == 0) {

  859.     pmv[1] =

  860.     pmv[2] = pmv[0];

  861.   }

  862.   else {

  863.     pmv[1] = &motion[(x / 8) + 2];

  864.     pmv[2] = &motion[(x / 8) + 4];

  865.   }

  866. 

  867.   result = svq1_decode_motion_vector (bitbuf, &mv, pmv);

  868. 

  869.   if (result != 0)

  870.     return result;

  871. 

  872.   /* predict and decode motion vector (1) */

  873.   pmv[0] = &mv;

  874.   if (y == 0) {

  875.     pmv[1] =

  876.     pmv[2] = pmv[0];

  877.   }

  878.   else {

  879.     pmv[1] = &motion[(x / 8) + 3];

  880.   }

  881.   result = svq1_decode_motion_vector (bitbuf, &motion[0], pmv);

  882. 

  883.   if (result != 0)

  884.     return result;

  885. 

  886.   /* predict and decode motion vector (2) */

  887.   pmv[1] = &motion[0];

  888.   pmv[2] = &motion[(x / 8) + 1];

  889. 

  890.   result = svq1_decode_motion_vector (bitbuf, &motion[(x / 8) + 2], pmv);

  891. 

  892.   if (result != 0)

  893.     return result;

  894. 

  895.   /* predict and decode motion vector (3) */

  896.   pmv[2] = &motion[(x / 8) + 2];

  897.   pmv[3] = &motion[(x / 8) + 3];

  898. 

  899.   result = svq1_decode_motion_vector (bitbuf, pmv[3], pmv);

  900. 

  901.   if (result != 0)

  902.     return result;

  903. 

  904.   /* form predictions */

  905.   for (i=0; i < 4; i++) {

  906.     src = &previous[(x + (pmv[i]->x >> 1)) + (y + (pmv[i]->y >> 1))*pitch];

  907.     dst = current;

  908. 

  909.     s->dsp.put_pixels_tab[1][((pmv[i]->y & 1) << 1) | (pmv[i]->x & 1)](dst,src,pitch,8);

  910. 

  911.     /* select next block */

  912.     if (i & 1) {

  913.       current  += 8*(pitch - 1);

  914.       previous += 8*(pitch - 1);

  915.     } else {

  916.       current  += 8;

  917.       previous += 8;

  918.     }

  919.   }

  920. 

  921.   return 0;

  922. }

  923. 

  924. static int svq1_decode_delta_block (MpegEncContext *s, bit_buffer_t *bitbuf,

  925. 			uint8_t *current, uint8_t *previous, int pitch,

  926. 			svq1_pmv_t *motion, int x, int y) {

  927.   uint32_t bit_cache;

  928.   uint32_t block_type;

  929.   int	   result = 0;

  930. 

  931.   /* get block type */

  932.   bit_cache = get_bit_cache (bitbuf);

  933. 

  934.   bit_cache	>>= (32 - 3);

  935.   block_type	  = svq1_block_type_table[bit_cache].value;

  936.   skip_bits(bitbuf,svq1_block_type_table[bit_cache].length);

  937. 

  938.   /* reset motion vectors */

  939.   if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {

  940.     motion[0].x		  =

  941.     motion[0].y		  =

  942.     motion[(x / 8) + 2].x =

  943.     motion[(x / 8) + 2].y =

  944.     motion[(x / 8) + 3].x =

  945.     motion[(x / 8) + 3].y = 0;

  946.   }

  947. 

  948.   switch (block_type) {

  949.   case SVQ1_BLOCK_SKIP:

  950.     svq1_skip_block (current, previous, pitch, x, y);

  951.     break;

  952. 

  953.   case SVQ1_BLOCK_INTER:

  954.     result = svq1_motion_inter_block (s, bitbuf, current, previous, pitch, motion, x, y);

  955. 

  956.     if (result != 0)

  957.     {

  958. #ifdef DEBUG_SVQ1

  959.     printf("Error in svq1_motion_inter_block %i\n",result);

  960. #endif

  961.       break;

  962.     }

  963.     result = svq1_decode_block_non_intra (bitbuf, current, pitch);

  964.     break;

  965. 

  966.   case SVQ1_BLOCK_INTER_4V:

  967.     result = svq1_motion_inter_4v_block (s, bitbuf, current, previous, pitch, motion, x, y);

  968. 

  969.     if (result != 0)

  970.     {

  971. #ifdef DEBUG_SVQ1

  972.     printf("Error in svq1_motion_inter_4v_block %i\n",result);

  973. #endif

  974.       break;

  975.     }

  976.     result = svq1_decode_block_non_intra (bitbuf, current, pitch);

  977.     break;

  978. 

  979.   case SVQ1_BLOCK_INTRA:

  980.     result = svq1_decode_block_intra (bitbuf, current, pitch);

  981.     break;

  982.   }

  983. 

  984.   return result;

  985. }

  986. 

  987. /* standard video sizes */

  988. static struct { int width; int height; } svq1_frame_size_table[8] = {

  989.   { 160, 120 }, { 128,  96 }, { 176, 144 }, { 352, 288 },

  990.   { 704, 576 }, { 240, 180 }, { 320, 240 }, {  -1,  -1 }

  991. };

  992. 

  993. static int svq1_decode_frame_header (bit_buffer_t *bitbuf,MpegEncContext *s) {

  994.   int frame_size_code;

  995. 

  996.   /* unknown field */

  997.   get_bits (bitbuf, 8);

  998. 

  999.   /* frame type */

  1000.   s->pict_type= get_bits (bitbuf, 2)+1;

  1001.   if(s->pict_type==4) 

  1002.       return -1;

  1003. 

  1004.   if (s->pict_type == I_TYPE) {

  1005. 

  1006.     /* unknown fields */

  1007.     if (s->f_code == 0x50 || s->f_code == 0x60) {

  1008.       get_bits (bitbuf, 16);

  1009.     }

  1010. 

  1011.     if ((s->f_code ^ 0x10) >= 0x50) {

  1012.       skip_bits(bitbuf,8*get_bits (bitbuf, 8));

  1013.     }

  1014. 

  1015.     get_bits (bitbuf, 2);

  1016.     get_bits (bitbuf, 2);

  1017.     get_bits (bitbuf, 1);

  1018. 

  1019.     /* load frame size */

  1020.     frame_size_code = get_bits (bitbuf, 3);

  1021. 

  1022.     if (frame_size_code == 7) {

  1023.       /* load width, height (12 bits each) */

  1024.       s->width = get_bits (bitbuf, 12);

  1025.       s->height = get_bits (bitbuf, 12);

  1026. 

  1027.       if (!s->width || !s->height)

  1028.         return -1;

  1029.     } else {

  1030.       /* get width, height from table */

  1031.       s->width = svq1_frame_size_table[frame_size_code].width;

  1032.       s->height = svq1_frame_size_table[frame_size_code].height;

  1033.     }

  1034.   }

  1035. 

  1036.   /* unknown fields */

  1037.   if (get_bits (bitbuf, 1) == 1) {

  1038.     get_bits (bitbuf, 1);

  1039.     get_bits (bitbuf, 1);

  1040. 

  1041.     if (get_bits (bitbuf, 2) != 0)

  1042.       return -1;

  1043.   }

  1044. 

  1045.   if (get_bits (bitbuf, 1) == 1) {

  1046.     get_bits (bitbuf, 1);

  1047.     get_bits (bitbuf, 4);

  1048.     get_bits (bitbuf, 1);

  1049.     get_bits (bitbuf, 2);

  1050. 

  1051.     while (get_bits (bitbuf, 1) == 1) {

  1052.       get_bits (bitbuf, 8);

  1053.     }

  1054.   }

  1055.   

  1056.   return 0;

  1057. }

  1058. 

  1059. static int svq1_decode_frame(AVCodecContext *avctx, 

  1060.                              void *data, int *data_size,

  1061.                              UINT8 *buf, int buf_size)

  1062. {

  1063.   MpegEncContext *s=avctx->priv_data;

  1064.   uint8_t      *current, *previous;

  1065.   int		result, i, x, y, width, height;

  1066.   AVPicture *pict = data; 

  1067. 

  1068.   /* initialize bit buffer */

  1069.   init_get_bits(&s->gb,buf,buf_size);

  1070. 

  1071.   /* decode frame header */

  1072.   s->f_code = get_bits (&s->gb, 22);

  1073. 

  1074.   if ((s->f_code & ~0x70) || !(s->f_code & 0x60))

  1075.     return -1;

  1076. 

  1077.   /* swap some header bytes (why?) */

  1078.   if (s->f_code != 0x20) {

  1079.     uint32_t *src = (uint32_t *) (buf + 4);

  1080. 

  1081.     for (i=0; i < 4; i++) {

  1082.       src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];

  1083.     }

  1084.   }

  1085. 

  1086.   result = svq1_decode_frame_header (&s->gb, s);

  1087.   

  1088.   if(MPV_frame_start(s, avctx) < 0)

  1089.       return -1;

  1090. 

  1091.   if (result != 0)

  1092.   {

  1093. #ifdef DEBUG_SVQ1

  1094.     printf("Error in svq1_decode_frame_header %i\n",result);

  1095. #endif

  1096.     return result;

  1097.   }

  1098.   

  1099.   if(avctx->hurry_up && s->pict_type==B_TYPE) return buf_size;

  1100. 

  1101.   /* decode y, u and v components */

  1102.   for (i=0; i < 3; i++) {

  1103.     int linesize;

  1104.     if (i == 0) {

  1105.       width  = (s->width+15)&~15;

  1106.       height = (s->height+15)&~15;

  1107.       linesize= s->linesize;

  1108.     } else {

  1109.       if(s->flags&CODEC_FLAG_GRAY) break;

  1110.       width  = (s->width/4+15)&~15;

  1111.       height = (s->height/4+15)&~15;

  1112.       linesize= s->uvlinesize;

  1113.     }

  1114. 

  1115.     current  = s->current_picture[i];

  1116. 

  1117.     if(s->pict_type==B_TYPE){

  1118.         previous = s->next_picture[i];

  1119.     }else{

  1120.         previous = s->last_picture[i];

  1121.     }

  1122. 

  1123.     if (s->pict_type == I_TYPE) {

  1124.       /* keyframe */

  1125.       for (y=0; y < height; y+=16) {

  1126. 	for (x=0; x < width; x+=16) {

  1127. 	  result = svq1_decode_block_intra (&s->gb, &current[x], linesize);

  1128. 	  if (result != 0)

  1129. 	  {

  1130. #ifdef DEBUG_SVQ1

  1131. 	    printf("Error in svq1_decode_block %i (keyframe)\n",result);

  1132. #endif

  1133. 	    return result;

  1134. 	  }

  1135. 	}

  1136. 	current += 16*linesize;

  1137.       }

  1138.     } else {

  1139.       svq1_pmv_t pmv[width/8+3];

  1140.       /* delta frame */

  1141.       memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv_t));

  1142. 

  1143.       for (y=0; y < height; y+=16) {

  1144. 	for (x=0; x < width; x+=16) {

  1145. 	  result = svq1_decode_delta_block (s, &s->gb, &current[x], previous,

  1146. 					    linesize, pmv, x, y);

  1147. 	  if (result != 0)

  1148. 	  {

  1149. #ifdef DEBUG_SVQ1

  1150.     printf("Error in svq1_decode_delta_block %i\n",result);

  1151. #endif

  1152. 	    return result;

  1153. 	  }

  1154. 	}

  1155. 

  1156. 	pmv[0].x =

  1157. 	pmv[0].y = 0;

  1158. 

  1159. 	current += 16*linesize;

  1160.       }

  1161.     }

  1162. 

  1163.     pict->data[i] = s->current_picture[i];

  1164.     pict->linesize[i] = linesize;

  1165.   }

  1166. 

  1167.   *data_size=sizeof(AVPicture);

  1168.   return buf_size;

  1169. }

  1170. 

  1171. static int svq1_decode_init(AVCodecContext *avctx)

  1172. {

  1173.     MpegEncContext *s = avctx->priv_data;

  1174. 

  1175.     s->avctx = avctx;

  1176.     s->width = (avctx->width+3)&~3;

  1177.     s->height = (avctx->height+3)&~3;

  1178.     s->codec_id= avctx->codec->id;

  1179.     avctx->mbskip_table= s->mbskip_table;

  1180.     avctx->pix_fmt = PIX_FMT_YUV410P;

  1181.     avctx->has_b_frames= s->has_b_frames=1; // not true, but DP frames and these behave like unidirectional b frames

  1182.     s->flags= avctx->flags;

  1183.     if (MPV_common_init(s) < 0) return -1;

  1184.     return 0;

  1185. }

  1186. 

  1187. static int svq1_decode_end(AVCodecContext *avctx)

  1188. {

  1189.     MpegEncContext *s = avctx->priv_data;

  1190. 

  1191.     MPV_common_end(s);

  1192.     return 0;

  1193. }

  1194. 

  1195. AVCodec svq1_decoder = {

  1196.     "svq1",

  1197.     CODEC_TYPE_VIDEO,

  1198.     CODEC_ID_SVQ1,

  1199.     sizeof(MpegEncContext),

  1200.     svq1_decode_init,

  1201.     NULL,

  1202.     svq1_decode_end,

  1203.     svq1_decode_frame,

  1204.     CODEC_CAP_DR1,

  1205. };