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/*
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 * 
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 * Copyright (C) 2002 the xine project
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 * Copyright (C) 2002 the ffmpeg project
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 * 
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with this library; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 * Ported to mplayer by Arpi <arpi@thot.banki.hu>
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 * Ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
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 *
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 */
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//#define DEBUG_SVQ1
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "common.h"
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#include "avcodec.h"
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#include "dsputil.h"
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#include "mpegvideo.h"
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#include "bswap.h"
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#define bit_buffer_t GetBitContext
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static inline unsigned int get_bit_cache(GetBitContext *s){
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    OPEN_READER(re, s)
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    UPDATE_CACHE(re, s)
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    return GET_CACHE(re, s);
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//    CLOSE_READER(re, s)
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}
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/* variable length (bit) code */
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typedef struct vlc_code_s {
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  int16_t         value        :10,
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                 length        :6;
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} vlc_code_t;
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#define MEDIAN(a,b,c)        (((a < b) != (b >= c)) ? b : (((a < c) != (c > b)) ? c : a))
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#define SVQ1_BLOCK_SKIP                0
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#define SVQ1_BLOCK_INTER        1
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#define SVQ1_BLOCK_INTER_4V        2
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#define SVQ1_BLOCK_INTRA        3
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/* motion vector (prediction) */
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typedef struct svq1_pmv_s {
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  int                 x;
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  int                 y;
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} svq1_pmv_t;
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#include "svq1_cb.h"
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/* block type, codes 000 .. 1xx */
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static vlc_code_t svq1_block_type_table[8] = {
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  { SVQ1_BLOCK_INTRA, 3 }, { SVQ1_BLOCK_INTER_4V, 3 },
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  { SVQ1_BLOCK_INTER, 2 }, { SVQ1_BLOCK_INTER,    2 },
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  { SVQ1_BLOCK_SKIP,  1 }, { SVQ1_BLOCK_SKIP,     1 },
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  { SVQ1_BLOCK_SKIP,  1 }, { SVQ1_BLOCK_SKIP,     1 }
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};
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/* motion vector, codes 0000011 .. 011xxxx */
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static vlc_code_t svq1_motion_table_0[61] = {
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  { 7, 8 }, { 6, 8 }, { 5, 8 }, { 4, 7 }, { 4, 7 },
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  { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 },
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  { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },
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  { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },
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  { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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  { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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  { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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  { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }
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};
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/* motion vector, codes 000000000010 ... 0000010111xx */
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static vlc_code_t svq1_motion_table_1[94] = {
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  {32, 13}, {31, 13}, {30, 12}, {30, 12}, {29, 12}, {29, 12},
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  {28, 12}, {28, 12}, {27, 12}, {27, 12}, {26, 12}, {26, 12}, {25, 12}, {25, 12},
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  {24, 11}, {24, 11}, {24, 11}, {24, 11}, {23, 11}, {23, 11}, {23, 11}, {23, 11},
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  {22, 11}, {22, 11}, {22, 11}, {22, 11}, {21, 11}, {21, 11}, {21, 11}, {21, 11},
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  {20, 11}, {20, 11}, {20, 11}, {20, 11}, {19, 11}, {19, 11}, {19, 11}, {19, 11},
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  {18, 11}, {18, 11}, {18, 11}, {18, 11}, {17, 11}, {17, 11}, {17, 11}, {17, 11},
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  {16, 11}, {16, 11}, {16, 11}, {16, 11}, {15, 11}, {15, 11}, {15, 11}, {15, 11},
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  {14, 11}, {14, 11}, {14, 11}, {14, 11}, {13, 11}, {13, 11}, {13, 11}, {13, 11},
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  {12, 11}, {12, 11}, {12, 11}, {12, 11}, {11, 11}, {11, 11}, {11, 11}, {11, 11},
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  {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10}, {10, 10},
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  { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10}, { 9, 10},
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  { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10}, { 8, 10},
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};
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/* inter-coded vector codebook count tables, codes 000000 ... 111111 */
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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 },
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    { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },
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    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },
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    {-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 } },
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113
  /* 4x4 vector, codes 0000xxx ... 11xxxxx */
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  { { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },
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    { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },
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    { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },
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    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },
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    {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 },
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    {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 }, {-1, 2 } },
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123
  /* 8x4 vector, codes 00000xx ... 1xxxxxx */
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  { { 6, 5 }, { 6, 5 }, { 5, 5 }, { 5, 5 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },
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    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } },
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  /* 8x8 vector, codes 00000xx ... 1xxxxxx */
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  { { 6, 5 }, { 6, 5 }, { 5, 5 }, { 5, 5 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },
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    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } },
142

    
143
  /* 16x8 vector, codes 00000xx ... 1xxxxxx */
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  { { 6, 5 }, { 6, 5 }, { 5, 5 }, { 5, 5 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },
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    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 }, { 2, 4 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 }, { 0, 3 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } },
152

    
153
  /* 16x16 vector, codes 000000x ... 1xxxxxx */
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  { { 6, 6 }, { 5, 6 }, { 4, 5 }, { 4, 5 }, { 3, 5 }, { 3, 5 }, { 2, 5 }, { 2, 5 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },
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    { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 },
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    {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 }, {-1, 1 } }
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};
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/* vector codebook count tables, codes 0000000 ... 1111111 */
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static vlc_code_t svq1_intra_vector_tables[6][128] = {
166
  /* 4x2 vector, codes 00000xx ... 1xxxxxx */
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  { { 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 },
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    { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },
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    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },
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    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
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    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
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    { 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 = (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
  uint32_t   *codebook;
609
  int              entries[6];
610
  int              i, j, m, n;
611
  int              mean, stages;
612
  int              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
  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 (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
  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 (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
    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 (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 (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 (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->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
};