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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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/**
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 * @file svq1.c
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 * svq1 decoder.
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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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#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] = {
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  /* 4x2 vector, codes 0000xxx ... 11xxxxx */
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  { { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },
110
    { 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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  /* 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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128
  /* 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 } },
137

    
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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 } },
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  /* 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 } },
157

    
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  /* 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] = {
171
  /* 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 },
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    { 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 } },
188

    
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  /* 4x4 vector, codes 0000xxx ... 11xxxxx */
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  { { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },
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    {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 }, {-1, 4 },
192
    { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },
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    { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },
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    { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },
195
    { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },
196
    { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },
197
    { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 }, { 3, 3 },
198
    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
199
    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
200
    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
201
    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
202
    { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },
203
    { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },
204
    { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 },
205
    { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 }, { 0, 2 } },
206

    
207
  /* 8x4 vector, codes 00000xx ... 1xxxxxx */
208
  { { 2, 5 }, { 2, 5 }, { 2, 5 }, { 2, 5 }, {-1, 5 }, {-1, 5 }, {-1, 5 }, {-1, 5 },
209
    { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 },
210
    { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 }, { 5, 4 },
211
    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },
212
    { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },
213
    { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 }, { 4, 3 },
214
    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },
215
    { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 }, { 1, 3 },  
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
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
220
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
221
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
222
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
223
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },
224

    
225
  /* 8x8 vector, codes 000000x ... 1xxxxxx */
226
  { { 2, 6 }, { 2, 6 }, {-1, 6 }, {-1, 6 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 },
227
    { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 }, { 6, 4 },
228
    { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 }, { 4, 4 },
229
    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },
230
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
231
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
232
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
233
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
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
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
238
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
239
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
240
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
241
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },
242

    
243
  /* 16x8 vector, codes 000000x ... 1xxxxxx */
244
  { { 4, 6 }, { 4, 6 }, {-1, 6 }, {-1, 6 }, { 5, 5 }, { 5, 5 }, { 5, 5 }, { 5, 5 },
245
    { 3, 5 }, { 3, 5 }, { 3, 5 }, { 3, 5 }, { 2, 5 }, { 2, 5 }, { 2, 5 }, { 2, 5 },
246
    { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },
247
    { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 }, { 6, 3 },
248
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
249
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
250
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
251
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
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
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
256
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
257
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
258
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
259
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } },
260

    
261
  /* 16x16 vector, codes 0000000 ... 1xxxxxx */
262
  { { 5, 7 }, {-1, 7 }, { 4, 6 }, { 4, 6 }, { 6, 5 }, { 6, 5 }, { 6, 5 }, { 6, 5 },
263
    { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 }, { 3, 4 },
264
    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
265
    { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 }, { 2, 3 },
266
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
267
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
268
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
269
    { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 }, { 1, 2 },
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
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
274
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
275
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
276
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 },
277
    { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 }, { 0, 1 } }
278
};
279

    
280
/* intra mean value, codes 00100101 ... 1111xxxx */
281
static vlc_code_t svq1_intra_mean_table_0[219] = {
282
  {135, 8 }, {136, 8 }, {165, 8 },
283
  {134, 8 }, {129, 8 }, {164, 8 }, {163, 8 }, {133, 8 }, {162, 8 }, {174, 8 }, {175, 8 },
284
  {161, 8 }, {160, 8 }, {159, 8 }, {158, 8 }, {157, 8 }, {156, 8 }, {155, 8 }, {154, 8 },
285
  {153, 8 }, {151, 8 }, {152, 8 }, {132, 8 }, {110, 8 }, {131, 8 }, {108, 8 }, {130, 8 },
286
  {166, 8 }, {105, 8 }, {104, 8 }, {103, 8 }, {127, 8 }, {101, 8 }, {167, 8 }, {168, 8 },
287
  { 98, 8 }, {128, 8 }, { 48, 8 }, { 95, 8 }, { 62, 8 }, { 93, 8 }, { 92, 8 }, { 91, 8 },
288
  { 90, 8 }, { 89, 8 }, { 60, 8 }, { 87, 8 }, { 86, 8 }, { 57, 8 }, { 84, 8 }, { 83, 8 },
289
  { 82, 8 }, { 81, 8 }, { 80, 8 }, { 79, 8 }, { 78, 8 }, { 77, 8 }, { 76, 8 }, { 75, 8 },
290
  { 74, 8 }, { 73, 8 }, { 72, 8 }, { 71, 8 }, { 70, 8 }, { 69, 8 }, { 68, 8 }, { 67, 8 },
291
  { 66, 8 }, { 65, 8 }, { 56, 8 }, { 63, 8 }, { 23, 8 }, { 61, 8 }, { 30, 8 }, { 59, 8 },
292
  { 58, 8 }, { 52, 8 }, { 29, 8 }, { 55, 8 }, { 54, 8 }, { 53, 8 }, { 50, 8 }, { 51, 8 },
293
  { 22, 8 }, { 49, 8 }, { 85, 7 }, { 85, 7 }, { 97, 7 }, { 97, 7 }, { 88, 7 }, { 88, 7 },
294
  { 64, 7 }, { 64, 7 }, { 94, 7 }, { 94, 7 }, {106, 7 }, {106, 7 }, {107, 7 }, {107, 7 },
295
  {109, 7 }, {109, 7 }, {111, 7 }, {111, 7 }, {112, 7 }, {112, 7 }, {113, 7 }, {113, 7 },
296
  {114, 7 }, {114, 7 }, {115, 7 }, {115, 7 }, {116, 7 }, {116, 7 }, {117, 7 }, {117, 7 },
297
  {118, 7 }, {118, 7 }, {119, 7 }, {119, 7 }, {120, 7 }, {120, 7 }, { 99, 7 }, { 99, 7 },
298
  {102, 7 }, {102, 7 }, { 28, 7 }, { 28, 7 }, {100, 7 }, {100, 7 }, { 96, 7 }, { 96, 7 },
299
  {139, 7 }, {139, 7 }, { 24, 7 }, { 24, 7 }, {  1, 7 }, {  1, 7 }, {138, 7 }, {138, 7 },
300
  {121, 7 }, {121, 7 }, {122, 7 }, {122, 7 }, {123, 7 }, {123, 7 }, {124, 7 }, {124, 7 },
301
  {125, 7 }, {125, 7 }, {126, 7 }, {126, 7 }, {137, 7 }, {137, 7 }, {140, 7 }, {140, 7 },
302
  {150, 7 }, {150, 7 }, {144, 7 }, {144, 7 }, {141, 7 }, {141, 7 }, {142, 7 }, {142, 7 },
303
  {143, 7 }, {143, 7 }, {145, 7 }, {145, 7 }, {147, 7 }, {147, 7 }, {146, 7 }, {146, 7 },
304
  { 27, 6 }, { 27, 6 }, { 27, 6 }, { 27, 6 }, {148, 6 }, {148, 6 }, {148, 6 }, {148, 6 },
305
  {149, 6 }, {149, 6 }, {149, 6 }, {149, 6 }, {  0, 6 }, {  0, 6 }, {  0, 6 }, {  0, 6 },
306
  { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 },
307
  { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 }, { 26, 4 },
308
  { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 },
309
  { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }, { 25, 4 }
310
};
311

    
312
/* intra mean value, codes 0000001101 ... 001001001x */
313
static vlc_code_t svq1_intra_mean_table_1[135] = {
314
  {218, 10}, {219, 10}, {220, 10},
315
  {221, 10}, {222, 10}, {217, 10}, {230, 10}, {215, 10}, {208, 10}, {207, 10}, {206, 10},
316
  {214, 10}, {204, 10}, {223, 10}, {224, 10}, {225, 10}, {226, 10}, {227, 10}, {228, 10},
317
  {229, 10}, {213, 10}, {212, 10}, {231, 10}, {232, 10}, {211, 10}, {210, 10}, {236, 10},
318
  {209, 10}, {216, 10}, {205, 10}, { 18, 10}, {186, 9 }, {186, 9 }, {185, 9 }, {185, 9 },
319
  {184, 9 }, {184, 9 }, {182, 9 }, {182, 9 }, {183, 9 }, {183, 9 }, {180, 9 }, {180, 9 },
320
  {181, 9 }, {181, 9 }, {178, 9 }, {178, 9 }, {187, 9 }, {187, 9 }, {176, 9 }, {176, 9 },
321
  {188, 9 }, {188, 9 }, {179, 9 }, {179, 9 }, {173, 9 }, {173, 9 }, {172, 9 }, {172, 9 },
322
  {171, 9 }, {171, 9 }, {170, 9 }, {170, 9 }, {169, 9 }, {169, 9 }, {189, 9 }, {189, 9 },
323
  {190, 9 }, {190, 9 }, {191, 9 }, {191, 9 }, {192, 9 }, {192, 9 }, {193, 9 }, {193, 9 },
324
  {194, 9 }, {194, 9 }, {195, 9 }, {195, 9 }, {196, 9 }, {196, 9 }, {197, 9 }, {197, 9 },
325
  {198, 9 }, {198, 9 }, {200, 9 }, {200, 9 }, {201, 9 }, {201, 9 }, {202, 9 }, {202, 9 },
326
  {203, 9 }, {203, 9 }, {199, 9 }, {199, 9 }, {177, 9 }, {177, 9 }, { 40, 9 }, { 40, 9 },
327
  { 39, 9 }, { 39, 9 }, { 38, 9 }, { 38, 9 }, { 37, 9 }, { 37, 9 }, { 36, 9 }, { 36, 9 },
328
  { 35, 9 }, { 35, 9 }, { 34, 9 }, { 34, 9 }, { 33, 9 }, { 33, 9 }, { 32, 9 }, { 32, 9 },
329
  { 31, 9 }, { 31, 9 }, { 21, 9 }, { 21, 9 }, { 11, 9 }, { 11, 9 }, { 41, 9 }, { 41, 9 },
330
  { 45, 9 }, { 45, 9 }, { 44, 9 }, { 44, 9 }, { 42, 9 }, { 42, 9 }, { 43, 9 }, { 43, 9 },
331
  { 47, 9 }, { 47, 9 }, { 46, 9 }, { 46, 9 }
332
};
333

    
334
/* intra mean value, codes 00000000000001 ... 00000011001xxx */
335
static vlc_code_t svq1_intra_mean_table_2[207] = {
336
  {255, 14}, { 14, 14}, { 13, 14}, { 17, 12}, { 17, 12}, { 17, 12}, { 17, 12},
337
  {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11}, {243, 11},
338
  {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11}, {242, 11},
339
  {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11}, {241, 11},
340
  {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11}, {240, 11},
341
  {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11}, {237, 11},
342
  {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11}, {239, 11},
343
  {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11}, {235, 11},
344
  {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11}, {234, 11},
345
  {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11}, {233, 11},
346
  {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11}, {244, 11},
347
  {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11}, {238, 11},
348
  { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11}, { 20, 11},
349
  {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11}, {248, 11},
350
  {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11}, {249, 11},
351
  {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11}, {250, 11},
352
  {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11}, {251, 11},
353
  {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11}, {252, 11},
354
  {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11}, {253, 11},
355
  {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11}, {254, 11},
356
  { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11}, { 12, 11},
357
  { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11}, { 10, 11},
358
  {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11}, {245, 11},
359
  {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11}, {247, 11},
360
  { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11}, { 19, 11},
361
  {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}, {246, 11}
362
};
363

    
364
/* intra mean value, codes 00000000000000000000 ... 000000000000001xxxxx */
365
static vlc_code_t svq1_intra_mean_table_3[64] = {
366
  {  6, 20}, {  3, 20}, {  4, 20}, {  5, 20}, {  7, 20}, {  8, 20}, {  9, 19}, {  9, 19},
367
  {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17}, {  2, 17},
368
  { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16},
369
  { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16}, { 16, 16},
370
  { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15},
371
  { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15},
372
  { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15},
373
  { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}, { 15, 15}
374
};
375

    
376
/* inter mean value, codes 00001011 ... 1xxxxxxx */
377
static vlc_code_t svq1_inter_mean_table_0[245] = {
378
  { 10, 8 }, { 12, 8 }, { 11, 8 }, {-11, 8 }, {-12, 8 },
379
  {-10, 8 }, { -9, 8 }, { -7, 7 }, { -7, 7 }, { -6, 7 }, { -6, 7 }, {  8, 7 }, {  8, 7 },
380
  { -8, 7 }, { -8, 7 }, {  9, 7 }, {  9, 7 }, {  6, 7 }, {  6, 7 }, {  7, 7 }, {  7, 7 },
381
  { -5, 6 }, { -5, 6 }, { -5, 6 }, { -5, 6 }, { -4, 6 }, { -4, 6 }, { -4, 6 }, { -4, 6 },
382
  {  5, 6 }, {  5, 6 }, {  5, 6 }, {  5, 6 }, {  4, 6 }, {  4, 6 }, {  4, 6 }, {  4, 6 },
383
  {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 }, {  3, 5 },
384
  {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 }, {  2, 5 },
385
  { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 }, { -2, 5 },
386
  { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 }, { -3, 5 },
387
  { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 },
388
  { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 }, { -1, 4 },
389
  {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },
390
  {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },
391
  {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },
392
  {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 }, {  1, 3 },
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
  {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },
405
  {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },
406
  {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },
407
  {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 },
408
  {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }, {  0, 1 }
409
};
410

    
411
/* inter mean value, codes 000000010010 ... 00001011xxxx */
412
static vlc_code_t svq1_inter_mean_table_1[158] = {
413
  {-30, 12}, {-31, 12}, {-32, 12}, {-33, 12}, { 31, 12}, {-34, 12},
414
  {-35, 12}, { 29, 12}, { 30, 12}, { 33, 12}, { 34, 12}, { 32, 12}, {-29, 11}, {-29, 11},
415
  {-28, 11}, {-28, 11}, { 28, 11}, { 28, 11}, {-27, 11}, {-27, 11}, {-26, 11}, {-26, 11},
416
  { 27, 11}, { 27, 11}, { 26, 11}, { 26, 11}, { 25, 11}, { 25, 11}, { 24, 11}, { 24, 11},
417
  { 23, 11}, { 23, 11}, { 22, 11}, { 22, 11}, {-24, 11}, {-24, 11}, {-25, 11}, {-25, 11},
418
  {-23, 10}, {-23, 10}, {-23, 10}, {-23, 10}, {-21, 10}, {-21, 10}, {-21, 10}, {-21, 10},
419
  {-20, 10}, {-20, 10}, {-20, 10}, {-20, 10}, {-19, 10}, {-19, 10}, {-19, 10}, {-19, 10},
420
  {-18, 10}, {-18, 10}, {-18, 10}, {-18, 10}, {-22, 10}, {-22, 10}, {-22, 10}, {-22, 10},
421
  { 19, 10}, { 19, 10}, { 19, 10}, { 19, 10}, { 21, 10}, { 21, 10}, { 21, 10}, { 21, 10},
422
  { 20, 10}, { 20, 10}, { 20, 10}, { 20, 10}, { 18, 10}, { 18, 10}, { 18, 10}, { 18, 10},
423
  {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 }, {-14, 9 },
424
  {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 }, {-17, 9 },
425
  { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 }, { 16, 9 },
426
  { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 }, { 13, 9 },
427
  { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 }, { 14, 9 },
428
  { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 }, { 15, 9 },
429
  { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 }, { 17, 9 },
430
  {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 }, {-13, 9 },
431
  {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 }, {-16, 9 },
432
  {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }, {-15, 9 }
433
};
434

    
435
/* inter mean value, codes 000000000010111 ... 0000000100011xx */
436
static vlc_code_t svq1_inter_mean_table_2[121] = {
437
  { 61, 15},
438
  { 52, 15}, { 58, 15}, {-56, 15}, {-57, 15}, { 59, 15}, {-55, 15}, { 60, 15}, {-54, 15},
439
  { 53, 15}, {-62, 15}, {-60, 15}, {-59, 15}, {-58, 15}, { 57, 15}, { 56, 15}, {-53, 15},
440
  { 55, 15}, { 54, 15}, { 50, 14}, { 50, 14}, { 45, 14}, { 45, 14}, {-52, 14}, {-52, 14},
441
  {-51, 14}, {-51, 14}, {-50, 14}, {-50, 14}, { 46, 14}, { 46, 14}, {-49, 14}, {-49, 14},
442
  {-48, 14}, {-48, 14}, { 48, 14}, { 48, 14}, {-47, 14}, {-47, 14}, { 49, 14}, { 49, 14},
443
  {-45, 14}, {-45, 14}, {-44, 14}, {-44, 14}, { 47, 14}, { 47, 14}, { 51, 14}, { 51, 14},
444
  { 44, 14}, { 44, 14}, {-46, 14}, {-46, 14}, {-43, 13}, {-43, 13}, {-43, 13}, {-43, 13},
445
  {-42, 13}, {-42, 13}, {-42, 13}, {-42, 13}, {-41, 13}, {-41, 13}, {-41, 13}, {-41, 13},
446
  {-40, 13}, {-40, 13}, {-40, 13}, {-40, 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
  {-36, 13}, {-36, 13}, {-36, 13}, {-36, 13}, { 42, 13}, { 42, 13}, { 42, 13}, { 42, 13},
449
  { 36, 13}, { 36, 13}, { 36, 13}, { 36, 13}, { 43, 13}, { 43, 13}, { 43, 13}, { 43, 13},
450
  { 41, 13}, { 41, 13}, { 41, 13}, { 41, 13}, { 40, 13}, { 40, 13}, { 40, 13}, { 40, 13},
451
  { 35, 13}, { 35, 13}, { 35, 13}, { 35, 13}, { 39, 13}, { 39, 13}, { 39, 13}, { 39, 13},
452
  { 38, 13}, { 38, 13}, { 38, 13}, { 38, 13}, { 37, 13}, { 37, 13}, { 37, 13}, { 37, 13}
453
};
454

    
455
/* inter mean value, codes 000000000000100101 ... 0000000000101101xx */
456
static vlc_code_t svq1_inter_mean_table_3[147] = {
457
  {111, 18}, {102, 18}, { 99, 18},
458
  {-86, 18}, { 97, 18}, {-97, 18}, { 96, 18}, {-95, 18}, {-76, 18}, {-77, 18}, {-78, 18},
459
  {-85, 18}, {-80, 18}, {-81, 18}, { 89, 18}, { 90, 18}, {-84, 18}, {-89, 18}, { 80, 18},  
460
  {-90, 18}, {-88, 18}, { 92, 18}, { 93, 18}, { 95, 18}, {-109,18}, {-79, 17}, {-79, 17},
461
  {-83, 17}, {-83, 17}, {-75, 17}, {-75, 17}, {-74, 17}, {-74, 17}, {-73, 17}, {-73, 17},
462
  {-72, 17}, {-72, 17}, { 87, 17}, { 87, 17}, { 86, 17}, { 86, 17}, { 75, 17}, { 75, 17},
463
  { 85, 17}, { 85, 17}, { 84, 17}, { 84, 17}, { 81, 17}, { 81, 17}, { 79, 17}, { 79, 17},
464
  { 74, 17}, { 74, 17}, { 72, 17}, { 72, 17}, { 82, 17}, { 82, 17}, { 78, 17}, { 78, 17},
465
  { 83, 17}, { 83, 17}, { 76, 17}, { 76, 17}, { 73, 17}, { 73, 17}, { 77, 17}, { 77, 17},
466
  { 70, 16}, { 70, 16}, { 70, 16}, { 70, 16}, { 69, 16}, { 69, 16}, { 69, 16}, { 69, 16},
467
  { 64, 16}, { 64, 16}, { 64, 16}, { 64, 16}, {-68, 16}, {-68, 16}, {-68, 16}, {-68, 16},
468
  {-66, 16}, {-66, 16}, {-66, 16}, {-66, 16}, { 68, 16}, { 68, 16}, { 68, 16}, { 68, 16},
469
  {-69, 16}, {-69, 16}, {-69, 16}, {-69, 16}, { 65, 16}, { 65, 16}, { 65, 16}, { 65, 16},
470
  { 71, 16}, { 71, 16}, { 71, 16}, { 71, 16}, {-70, 16}, {-70, 16}, {-70, 16}, {-70, 16},
471
  {-65, 16}, {-65, 16}, {-65, 16}, {-65, 16}, {-67, 16}, {-67, 16}, {-67, 16}, {-67, 16},
472
  {-63, 16}, {-63, 16}, {-63, 16}, {-63, 16}, {-71, 16}, {-71, 16}, {-71, 16}, {-71, 16},
473
  { 67, 16}, { 67, 16}, { 67, 16}, { 67, 16}, {-61, 16}, {-61, 16}, {-61, 16}, {-61, 16},
474
  {-64, 16}, {-64, 16}, {-64, 16}, {-64, 16}, { 63, 16}, { 63, 16}, { 63, 16}, { 63, 16},
475
  { 62, 16}, { 62, 16}, { 62, 16}, { 62, 16}, { 66, 16}, { 66, 16}, { 66, 16}, { 66, 16}
476
};
477

    
478
/* inter mean value, codes 00000000000001001001 ... 0000000000001001001x */
479
static vlc_code_t svq1_inter_mean_table_4[75] = {
480
  {142, 20}, {135, 20}, {125, 20}, {123, 20}, {122, 20}, {119, 20}, {117, 20},
481
  {113, 20}, {104, 20}, {103, 20}, {-120,20}, {-114,20}, {-108,20}, {-104,20}, {-102,20},
482
  {-101,20}, {-93, 20}, {-91, 19}, {-91, 19}, {-96, 19}, {-96, 19}, { 88, 19}, { 88, 19},
483
  { 91, 19}, { 91, 19}, { 94, 19}, { 94, 19}, {121, 19}, {121, 19}, {120, 19}, {120, 19},
484
  {-110,19}, {-110,19}, {118, 19}, {118, 19}, {115, 19}, {115, 19}, {114, 19}, {114, 19},
485
  {112, 19}, {112, 19}, {107, 19}, {107, 19}, {110, 19}, {110, 19}, {109, 19}, {109, 19},
486
  {108, 19}, {108, 19}, {-103,19}, {-103,19}, {106, 19}, {106, 19}, {105, 19}, {105, 19},
487
  {-100,19}, {-100,19}, {101, 19}, {101, 19}, {100, 19}, {100, 19}, {-99, 19}, {-99, 19},
488
  {-82, 19}, {-82, 19}, {-87, 19}, {-87, 19}, {-94, 19}, {-94, 19}, {-98, 19}, {-98, 19},
489
  { 98, 19}, { 98, 19}, {-92, 19}, {-92, 19}
490
};
491

    
492
/* inter mean value, codes 0000000000000000000000 ... 000000000000010010001x */
493
static vlc_code_t svq1_inter_mean_table_5[292] = {
494
  {255, 22}, {254, 22}, {253, 22}, {252, 22}, {251, 22}, {250, 22}, {249, 22}, {248, 22},
495
  {247, 22}, {246, 22}, {245, 22}, {244, 22}, {243, 22}, {242, 22}, {241, 22}, {240, 22},
496
  {239, 22}, {238, 22}, {237, 22}, {236, 22}, {235, 22}, {234, 22}, {233, 22}, {232, 22},
497
  {231, 22}, {230, 22}, {229, 22}, {228, 22}, {227, 22}, {226, 22}, {225, 22}, {224, 22},
498
  {223, 22}, {222, 22}, {221, 22}, {220, 22}, {219, 22}, {218, 22}, {217, 22}, {216, 22},
499
  {215, 22}, {214, 22}, {213, 22}, {212, 22}, {211, 22}, {210, 22}, {209, 22}, {208, 22},
500
  {207, 22}, {206, 22}, {205, 22}, {204, 22}, {203, 22}, {202, 22}, {201, 22}, {200, 22},
501
  {199, 22}, {198, 22}, {197, 22}, {196, 22}, {195, 22}, {194, 22}, {193, 22}, {192, 22},
502
  {191, 22}, {190, 22}, {189, 22}, {188, 22}, {187, 22}, {186, 22}, {185, 22}, {184, 22},
503
  {183, 22}, {182, 22}, {181, 22}, {180, 22}, {179, 22}, {178, 22}, {177, 22}, {176, 22},
504
  {175, 22}, {174, 22}, {173, 22}, {172, 22}, {171, 22}, {170, 22}, {169, 22}, {168, 22},
505
  {167, 22}, {166, 22}, {-256,22}, {164, 22}, {-211,22}, {162, 22}, {161, 22}, {160, 22},
506
  {-210,22}, {-168,22}, {157, 22}, {156, 22}, {155, 22}, {154, 22}, {153, 22}, {152, 22},
507
  {151, 22}, {150, 22}, {149, 22}, {148, 22}, {147, 22}, {146, 22}, {145, 22}, {144, 22},
508
  {143, 22}, {-208,22}, {141, 22}, {140, 22}, {139, 22}, {-200,22}, {137, 22}, {136, 22},
509
  {-198,22}, {134, 22}, {133, 22}, {-196,22}, {-201,22}, {130, 22}, {129, 22}, {128, 22},
510
  {127, 22}, {126, 22}, {-195,22}, {124, 22}, {-167,22}, {-166,22}, {-165,22}, {-164,22},
511
  {-163,22}, {-162,22}, {-161,22}, {-180,22}, {-160,22}, {-159,22}, {-158,22}, {-157,22},
512
  {-156,22}, {-155,22}, {-154,22}, {-153,22}, {-152,22}, {-151,22}, {-150,22}, {-149,22},
513
  {-148,22}, {-147,22}, {-146,22}, {-145,22}, {-144,22}, {-143,22}, {-142,22}, {-141,22},
514
  {-140,22}, {-139,22}, {-138,22}, {-137,22}, {-136,22}, {-135,22}, {-134,22}, {-133,22},
515
  {-132,22}, {-131,22}, {-130,22}, {-129,22}, {-126,22}, {-125,22}, {-124,22}, {-123,22},
516
  {-122,22}, {-121,22}, {-118,22}, {-116,22}, {-115,22}, {-113,22}, {-112,22}, {-107,22},
517
  {-106,22}, {-169,22}, {-170,22}, {-171,22}, {-172,22}, {-173,22}, {-174,22}, {-175,22},
518
  {-176,22}, {-177,22}, {-178,22}, {-187,22}, {-179,22}, {-181,22}, {-182,22}, {-183,22},
519
  {-184,22}, {-185,22}, {-186,22}, {-235,22}, {-188,22}, {-189,22}, {-190,22}, {-191,22},
520
  {-192,22}, {-193,22}, {-194,22}, {-197,22}, {-255,22}, {-254,22}, {-253,22}, {-252,22},
521
  {-251,22}, {-250,22}, {-249,22}, {-248,22}, {-247,22}, {-246,22}, {-245,22}, {-244,22},
522
  {-243,22}, {-242,22}, {-241,22}, {-240,22}, {-239,22}, {-238,22}, {-237,22}, {-232,22},
523
  {-236,22}, {-234,22}, {-233,22}, {-217,22}, {-231,22}, {-230,22}, {-229,22}, {-228,22},
524
  {-227,22}, {-226,22}, {-225,22}, {-224,22}, {-223,22}, {-222,22}, {-221,22}, {-220,22},
525
  {-219,22}, {-216,22}, {-202,22}, {-205,22}, {-215,22}, {-214,22}, {-213,22}, {-204,22},
526
  {-212,22}, {-209,22}, {-218,22}, {-199,22}, {-207,22}, {-206,22}, {165, 21}, {165, 21},
527
  {131, 21}, {131, 21}, {163, 21}, {163, 21}, {-203,21}, {-203,21}, {116, 21}, {116, 21},
528
  {159, 21}, {159, 21}, {138, 21}, {138, 21}, {158, 21}, {158, 21}, {-105,21}, {-105,21},
529
  {-111,21}, {-111,21}, {132, 21}, {132, 21}, {128, 21}, {128, 21}, {-127,21}, {-127,21},
530
  {-119,21}, {-119,21}, {-117,21}, {-117,21}
531
};
532

    
533
#define SVQ1_PROCESS_VECTOR()\
534
    for (; level > 0; i++) {\
535
      /* process next depth */\
536
      if (i == m) {\
537
        m = n;\
538
        if (--level == 0)\
539
          break;\
540
      }\
541
      /* divide block if next bit set */\
542
      if (get_bits (bitbuf, 1) == 0)\
543
        break;\
544
      /* add child nodes */\
545
      list[n++] = list[i];\
546
      list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level / 2) + 1));\
547
    }
548

    
549
#define SVQ1_ADD_CODEBOOK()\
550
          /* add codebook entries to vector */\
551
          for (j=0; j < stages; j++) {\
552
            n3  = codebook[entries[j]] ^ 0x80808080;\
553
            n1 += ((n3 & 0xFF00FF00) >> 8);\
554
            n2 +=  (n3 & 0x00FF00FF);\
555
          }\
556
\
557
          /* clip to [0..255] */\
558
          if (n1 & 0xFF00FF00) {\
559
            n3  = ((( n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
560
            n1 += 0x7F007F00;\
561
            n1 |= (((~n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
562
            n1 &= (n3 & 0x00FF00FF);\
563
          }\
564
\
565
          if (n2 & 0xFF00FF00) {\
566
            n3  = ((( n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
567
            n2 += 0x7F007F00;\
568
            n2 |= (((~n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
569
            n2 &= (n3 & 0x00FF00FF);\
570
          }
571

    
572
#define SVQ1_DO_CODEBOOK_INTRA()\
573
      for (y=0; y < height; y++) {\
574
        for (x=0; x < (width / 4); x++, codebook++) {\
575
        n1 = n4;\
576
        n2 = n4;\
577
        SVQ1_ADD_CODEBOOK()\
578
        /* store result */\
579
        dst[x] = (n1 << 8) | n2;\
580
        }\
581
        dst += (pitch / 4);\
582
      }
583

    
584
#define SVQ1_DO_CODEBOOK_NONINTRA()\
585
      for (y=0; y < height; y++) {\
586
        for (x=0; x < (width / 4); x++, codebook++) {\
587
        n3 = dst[x];\
588
        /* add mean value to vector */\
589
        n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\
590
        n2 =  (n3 & 0x00FF00FF)          + n4;\
591
        SVQ1_ADD_CODEBOOK()\
592
        /* store result */\
593
        dst[x] = (n1 << 8) | n2;\
594
        }\
595
        dst += (pitch / 4);\
596
      }
597

    
598
#define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\
599
      codebook = (const uint32_t *) cbook[level];\
600
      bit_cache = get_bits (bitbuf, 4*stages);\
601
      /* calculate codebook entries for this vector */\
602
      for (j=0; j < stages; j++) {\
603
        entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\
604
      }\
605
      mean -= (stages * 128);\
606
      n4    = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF);
607

    
608
static int svq1_decode_block_intra (bit_buffer_t *bitbuf, uint8_t *pixels, int pitch ) {
609
  uint32_t    bit_cache;
610
  vlc_code_t *vlc;
611
  uint8_t    *list[63];
612
  uint32_t   *dst;
613
  const uint32_t *codebook;
614
  int              entries[6];
615
  int              i, j, m, n;
616
  int              mean, stages;
617
  unsigned    x, y, width, height, level;
618
  uint32_t    n1, n2, n3, n4;
619

    
620
  /* initialize list for breadth first processing of vectors */
621
  list[0] = pixels;
622

    
623
  /* recursively process vector */
624
  for (i=0, m=1, n=1, level=5; i < n; i++) {
625
    SVQ1_PROCESS_VECTOR();
626

    
627
    /* destination address and vector size */
628
    dst = (uint32_t *) list[i];
629
    width = 1 << ((4 + level) /2);
630
    height = 1 << ((3 + level) /2);
631

    
632
    /* get number of stages (-1 skips vector, 0 for mean only) */
633
    bit_cache = get_bit_cache (bitbuf);
634

    
635
    vlc = &svq1_intra_vector_tables[level][bit_cache >> (32 - 7)];
636

    
637
    /* flush bits */
638
    stages            = vlc->value;
639
    skip_bits(bitbuf,vlc->length);
640

    
641
    if (stages == -1) {
642
        for (y=0; y < height; y++) {
643
          memset (&dst[y*(pitch / 4)], 0, width);
644
        }
645
      continue;                /* skip vector */
646
    }
647

    
648
    if ((stages > 0) && (level >= 4)) {
649
#ifdef DEBUG_SVQ1
650
    printf("Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",stages,level);
651
#endif
652
      return -1;        /* invalid vector */
653
    }
654

    
655
    /* get mean value for vector */
656
    bit_cache = get_bit_cache (bitbuf);
657

    
658
    if (bit_cache >= 0x25000000)
659
        vlc = &svq1_intra_mean_table_0[(bit_cache >> (32 - 8)) - 37];
660
    else if (bit_cache >= 0x03400000)
661
        vlc = &svq1_intra_mean_table_1[(bit_cache >> (32 - 10)) - 13];
662
    else if (bit_cache >= 0x00040000) 
663
        vlc = &svq1_intra_mean_table_2[(bit_cache >> (32 - 14)) - 1];
664
    else
665
        vlc = &svq1_intra_mean_table_3[bit_cache >> (32 - 20)];
666

    
667
    /* flush bits */
668
    mean            = vlc->value;
669
    skip_bits(bitbuf,vlc->length);
670

    
671
    if (stages == 0) {
672
      for (y=0; y < height; y++) {
673
        memset (&dst[y*(pitch / 4)], mean, width);
674
      }
675
    } else {
676
      SVQ1_CALC_CODEBOOK_ENTRIES(svq1_intra_codebooks);
677
      SVQ1_DO_CODEBOOK_INTRA()
678
    }
679
  }
680

    
681
  return 0;
682
}
683

    
684
static int svq1_decode_block_non_intra (bit_buffer_t *bitbuf, uint8_t *pixels, int pitch ) {
685
  uint32_t    bit_cache;
686
  vlc_code_t *vlc;
687
  uint8_t    *list[63];
688
  uint32_t   *dst;
689
  const uint32_t *codebook;
690
  int              entries[6];
691
  int              i, j, m, n;
692
  int              mean, stages;
693
  int              x, y, width, height, level;
694
  uint32_t    n1, n2, n3, n4;
695

    
696
  /* initialize list for breadth first processing of vectors */
697
  list[0] = pixels;
698

    
699
  /* recursively process vector */
700
  for (i=0, m=1, n=1, level=5; i < n; i++) {
701
    SVQ1_PROCESS_VECTOR();
702

    
703
    /* destination address and vector size */
704
    dst = (uint32_t *) list[i];
705
    width = 1 << ((4 + level) /2);
706
    height = 1 << ((3 + level) /2);
707

    
708
    /* get number of stages (-1 skips vector, 0 for mean only) */
709
    bit_cache = get_bit_cache (bitbuf);
710

    
711
    vlc = &svq1_inter_vector_tables[level][bit_cache >> (32 - 6)];
712

    
713
    /* flush bits */
714
    stages            = vlc->value;
715
    skip_bits(bitbuf,vlc->length);
716

    
717
    if (stages == -1) continue;        /* skip vector */
718

    
719
    if ((stages > 0) && (level >= 4)) {
720
#ifdef DEBUG_SVQ1
721
    printf("Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",stages,level);
722
#endif
723
      return -1;        /* invalid vector */
724
    }
725

    
726
    /* get mean value for vector */
727
    bit_cache = get_bit_cache (bitbuf);
728

    
729
    if (bit_cache >= 0x0B000000)
730
        vlc = &svq1_inter_mean_table_0[(bit_cache >> (32 - 8)) - 11];
731
    else if (bit_cache >= 0x01200000)
732
        vlc = &svq1_inter_mean_table_1[(bit_cache >> (32 - 12)) - 18];
733
    else if (bit_cache >= 0x002E0000) 
734
        vlc = &svq1_inter_mean_table_2[(bit_cache >> (32 - 15)) - 23];
735
    else if (bit_cache >= 0x00094000)
736
        vlc = &svq1_inter_mean_table_3[(bit_cache >> (32 - 18)) - 37];
737
    else if (bit_cache >= 0x00049000)
738
        vlc = &svq1_inter_mean_table_4[(bit_cache >> (32 - 20)) - 73];
739
    else
740
        vlc = &svq1_inter_mean_table_5[bit_cache >> (32 - 22)];
741

    
742
    /* flush bits */
743
    mean            = vlc->value;
744
    skip_bits(bitbuf,vlc->length);
745

    
746
    SVQ1_CALC_CODEBOOK_ENTRIES(svq1_inter_codebooks);
747
    SVQ1_DO_CODEBOOK_NONINTRA()
748
  }
749
  return 0;
750
}
751

    
752
static int svq1_decode_motion_vector (bit_buffer_t *bitbuf, svq1_pmv_t *mv, svq1_pmv_t **pmv) {
753
  uint32_t    bit_cache;
754
  vlc_code_t *vlc;
755
  int              diff, sign;
756
  int              i;
757

    
758
  for (i=0; i < 2; i++) {
759

    
760
    /* get motion code */
761
    bit_cache = get_bit_cache (bitbuf);
762

    
763
    if (!(bit_cache & 0xFFE00000))
764
      return -1;        /* invalid vlc code */
765

    
766
    if (bit_cache & 0x80000000) {
767
      diff = 0;
768

    
769
      /* flush bit */
770
      skip_bits(bitbuf,1);
771

    
772
    } else {
773
      if (bit_cache >= 0x06000000) {
774
        vlc = &svq1_motion_table_0[(bit_cache >> (32 - 7)) - 3];
775
      } else {
776
        vlc = &svq1_motion_table_1[(bit_cache >> (32 - 12)) - 2];
777
      }
778

    
779
      /* decode motion vector differential */
780
      sign = (int) (bit_cache << (vlc->length - 1)) >> 31;
781
      diff = (vlc->value ^ sign) - sign;
782

    
783
      /* flush bits */
784
      skip_bits(bitbuf,vlc->length);
785
    }
786

    
787
    /* add median of motion vector predictors and clip result */
788
    if (i == 1)
789
      mv->y = ((diff + MEDIAN(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26;
790
    else
791
      mv->x = ((diff + MEDIAN(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26;
792
  }
793

    
794
  return 0;
795
}
796

    
797
static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y) {
798
  uint8_t *src;
799
  uint8_t *dst;
800
  int           i;
801

    
802
  src = &previous[x + y*pitch];
803
  dst = current;
804

    
805
  for (i=0; i < 16; i++) {
806
    memcpy (dst, src, 16);
807
    src += pitch;
808
    dst += pitch;
809
  }
810
}
811

    
812
static int svq1_motion_inter_block (MpegEncContext *s, bit_buffer_t *bitbuf,
813
                               uint8_t *current, uint8_t *previous, int pitch,
814
                               svq1_pmv_t *motion, int x, int y) {
815
  uint8_t    *src;
816
  uint8_t    *dst;
817
  svq1_pmv_t  mv;
818
  svq1_pmv_t *pmv[3];
819
  int              result;
820

    
821
  /* predict and decode motion vector */
822
  pmv[0] = &motion[0];
823
  if (y == 0) {
824
    pmv[1] =
825
    pmv[2] = pmv[0];
826
  }
827
  else {
828
    pmv[1] = &motion[(x / 8) + 2];
829
    pmv[2] = &motion[(x / 8) + 4];
830
  }
831

    
832
  result = svq1_decode_motion_vector (bitbuf, &mv, pmv);
833

    
834
  if (result != 0)
835
    return result;
836

    
837
  motion[0].x                =
838
  motion[(x / 8) + 2].x        =
839
  motion[(x / 8) + 3].x        = mv.x;
840
  motion[0].y                =
841
  motion[(x / 8) + 2].y        =
842
  motion[(x / 8) + 3].y        = mv.y;
843
  
844
  if(y + (mv.y >> 1)<0)
845
     mv.y= 0;
846
  if(x + (mv.x >> 1)<0)
847
     mv.x= 0;
848

    
849
#if 0
850
  int w= (s->width+15)&~15;
851
  int h= (s->height+15)&~15;
852
  if(x + (mv.x >> 1)<0 || y + (mv.y >> 1)<0 || x + (mv.x >> 1) + 16 > w || y + (mv.y >> 1) + 16> h)
853
      printf("%d %d %d %d\n", x, y, x + (mv.x >> 1), y + (mv.y >> 1));
854
#endif
855
 
856
  src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1))*pitch];
857
  dst = current;
858

    
859
  s->dsp.put_pixels_tab[0][((mv.y & 1) << 1) | (mv.x & 1)](dst,src,pitch,16);
860

    
861
  return 0;
862
}
863

    
864
static int svq1_motion_inter_4v_block (MpegEncContext *s, bit_buffer_t *bitbuf,
865
                                  uint8_t *current, uint8_t *previous, int pitch,
866
                                  svq1_pmv_t *motion,int x, int y) {
867
  uint8_t    *src;
868
  uint8_t    *dst;
869
  svq1_pmv_t  mv;
870
  svq1_pmv_t *pmv[4];
871
  int              i, result;
872

    
873
  /* predict and decode motion vector (0) */
874
  pmv[0] = &motion[0];
875
  if (y == 0) {
876
    pmv[1] =
877
    pmv[2] = pmv[0];
878
  }
879
  else {
880
    pmv[1] = &motion[(x / 8) + 2];
881
    pmv[2] = &motion[(x / 8) + 4];
882
  }
883

    
884
  result = svq1_decode_motion_vector (bitbuf, &mv, pmv);
885

    
886
  if (result != 0)
887
    return result;
888

    
889
  /* predict and decode motion vector (1) */
890
  pmv[0] = &mv;
891
  if (y == 0) {
892
    pmv[1] =
893
    pmv[2] = pmv[0];
894
  }
895
  else {
896
    pmv[1] = &motion[(x / 8) + 3];
897
  }
898
  result = svq1_decode_motion_vector (bitbuf, &motion[0], pmv);
899

    
900
  if (result != 0)
901
    return result;
902

    
903
  /* predict and decode motion vector (2) */
904
  pmv[1] = &motion[0];
905
  pmv[2] = &motion[(x / 8) + 1];
906

    
907
  result = svq1_decode_motion_vector (bitbuf, &motion[(x / 8) + 2], pmv);
908

    
909
  if (result != 0)
910
    return result;
911

    
912
  /* predict and decode motion vector (3) */
913
  pmv[2] = &motion[(x / 8) + 2];
914
  pmv[3] = &motion[(x / 8) + 3];
915

    
916
  result = svq1_decode_motion_vector (bitbuf, pmv[3], pmv);
917

    
918
  if (result != 0)
919
    return result;
920

    
921
  /* form predictions */
922
  for (i=0; i < 4; i++) {
923
    int mvx= pmv[i]->x + (i&1)*16;
924
    int mvy= pmv[i]->y + (i>>1)*16;
925
  
926
    ///XXX /FIXME cliping or padding?
927
    if(y + (mvy >> 1)<0)
928
       mvy= 0;
929
    if(x + (mvx >> 1)<0)
930
       mvx= 0;
931

    
932
#if 0
933
  int w= (s->width+15)&~15;
934
  int h= (s->height+15)&~15;
935
  if(x + (mvx >> 1)<0 || y + (mvy >> 1)<0 || x + (mvx >> 1) + 8 > w || y + (mvy >> 1) + 8> h)
936
      printf("%d %d %d %d\n", x, y, x + (mvx >> 1), y + (mvy >> 1));
937
#endif
938
    src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1))*pitch];
939
    dst = current;
940
    
941
    s->dsp.put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst,src,pitch,8);
942

    
943
    /* select next block */
944
    if (i & 1) {
945
      current  += 8*(pitch - 1);
946
    } else {
947
      current  += 8;
948
    }
949
  }
950

    
951
  return 0;
952
}
953

    
954
static int svq1_decode_delta_block (MpegEncContext *s, bit_buffer_t *bitbuf,
955
                        uint8_t *current, uint8_t *previous, int pitch,
956
                        svq1_pmv_t *motion, int x, int y) {
957
  uint32_t bit_cache;
958
  uint32_t block_type;
959
  int           result = 0;
960

    
961
  /* get block type */
962
  bit_cache = get_bit_cache (bitbuf);
963

    
964
  bit_cache        >>= (32 - 3);
965
  block_type          = svq1_block_type_table[bit_cache].value;
966
  skip_bits(bitbuf,svq1_block_type_table[bit_cache].length);
967

    
968
  /* reset motion vectors */
969
  if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
970
    motion[0].x                  =
971
    motion[0].y                  =
972
    motion[(x / 8) + 2].x =
973
    motion[(x / 8) + 2].y =
974
    motion[(x / 8) + 3].x =
975
    motion[(x / 8) + 3].y = 0;
976
  }
977

    
978
  switch (block_type) {
979
  case SVQ1_BLOCK_SKIP:
980
    svq1_skip_block (current, previous, pitch, x, y);
981
    break;
982

    
983
  case SVQ1_BLOCK_INTER:
984
    result = svq1_motion_inter_block (s, bitbuf, current, previous, pitch, motion, x, y);
985

    
986
    if (result != 0)
987
    {
988
#ifdef DEBUG_SVQ1
989
    printf("Error in svq1_motion_inter_block %i\n",result);
990
#endif
991
      break;
992
    }
993
    result = svq1_decode_block_non_intra (bitbuf, current, pitch);
994
    break;
995

    
996
  case SVQ1_BLOCK_INTER_4V:
997
    result = svq1_motion_inter_4v_block (s, bitbuf, current, previous, pitch, motion, x, y);
998

    
999
    if (result != 0)
1000
    {
1001
#ifdef DEBUG_SVQ1
1002
    printf("Error in svq1_motion_inter_4v_block %i\n",result);
1003
#endif
1004
      break;
1005
    }
1006
    result = svq1_decode_block_non_intra (bitbuf, current, pitch);
1007
    break;
1008

    
1009
  case SVQ1_BLOCK_INTRA:
1010
    result = svq1_decode_block_intra (bitbuf, current, pitch);
1011
    break;
1012
  }
1013

    
1014
  return result;
1015
}
1016

    
1017
/* standard video sizes */
1018
static struct { int width; int height; } svq1_frame_size_table[8] = {
1019
  { 160, 120 }, { 128,  96 }, { 176, 144 }, { 352, 288 },
1020
  { 704, 576 }, { 240, 180 }, { 320, 240 }, {  -1,  -1 }
1021
};
1022

    
1023
static int svq1_decode_frame_header (bit_buffer_t *bitbuf,MpegEncContext *s) {
1024
  int frame_size_code;
1025

    
1026
  /* unknown field */
1027
  get_bits (bitbuf, 8);
1028

    
1029
  /* frame type */
1030
  s->pict_type= get_bits (bitbuf, 2)+1;
1031
  if(s->pict_type==4) 
1032
      return -1;
1033
      
1034
  if (s->pict_type == I_TYPE) {
1035

    
1036
    /* unknown fields */
1037
    if (s->f_code == 0x50 || s->f_code == 0x60) {
1038
      get_bits (bitbuf, 16);
1039
    }
1040

    
1041
    if ((s->f_code ^ 0x10) >= 0x50) {
1042
      skip_bits(bitbuf,8*get_bits (bitbuf, 8));
1043
    }
1044

    
1045
    get_bits (bitbuf, 2);
1046
    get_bits (bitbuf, 2);
1047
    get_bits (bitbuf, 1);
1048

    
1049
    /* load frame size */
1050
    frame_size_code = get_bits (bitbuf, 3);
1051

    
1052
    if (frame_size_code == 7) {
1053
      /* load width, height (12 bits each) */
1054
      s->width = get_bits (bitbuf, 12);
1055
      s->height = get_bits (bitbuf, 12);
1056

    
1057
      if (!s->width || !s->height)
1058
        return -1;
1059
    } else {
1060
      /* get width, height from table */
1061
      s->width = svq1_frame_size_table[frame_size_code].width;
1062
      s->height = svq1_frame_size_table[frame_size_code].height;
1063
    }
1064
  }
1065

    
1066
  /* unknown fields */
1067
  if (get_bits (bitbuf, 1) == 1) {
1068
    get_bits (bitbuf, 1);
1069
    get_bits (bitbuf, 1);
1070

    
1071
    if (get_bits (bitbuf, 2) != 0)
1072
      return -1;
1073
  }
1074

    
1075
  if (get_bits (bitbuf, 1) == 1) {
1076
    get_bits (bitbuf, 1);
1077
    get_bits (bitbuf, 4);
1078
    get_bits (bitbuf, 1);
1079
    get_bits (bitbuf, 2);
1080

    
1081
    while (get_bits (bitbuf, 1) == 1) {
1082
      get_bits (bitbuf, 8);
1083
    }
1084
  }
1085
  
1086
  return 0;
1087
}
1088

    
1089
static int svq1_decode_frame(AVCodecContext *avctx, 
1090
                             void *data, int *data_size,
1091
                             uint8_t *buf, int buf_size)
1092
{
1093
  MpegEncContext *s=avctx->priv_data;
1094
  uint8_t      *current, *previous;
1095
  int                result, i, x, y, width, height;
1096
  AVFrame *pict = data; 
1097

    
1098
  /* initialize bit buffer */
1099
  init_get_bits(&s->gb,buf,buf_size*8);
1100

    
1101
  /* decode frame header */
1102
  s->f_code = get_bits (&s->gb, 22);
1103

    
1104
  if ((s->f_code & ~0x70) || !(s->f_code & 0x60))
1105
    return -1;
1106

    
1107
  /* swap some header bytes (why?) */
1108
  if (s->f_code != 0x20) {
1109
    uint32_t *src = (uint32_t *) (buf + 4);
1110

    
1111
    for (i=0; i < 4; i++) {
1112
      src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
1113
    }
1114
  }
1115

    
1116
  result = svq1_decode_frame_header (&s->gb, s);
1117

    
1118
  if (result != 0)
1119
  {
1120
#ifdef DEBUG_SVQ1
1121
    printf("Error in svq1_decode_frame_header %i\n",result);
1122
#endif
1123
    return result;
1124
  }
1125
  
1126
  //FIXME this avoids some confusion for "B frames" without 2 references
1127
  //this should be removed after libavcodec can handle more flaxible picture types & ordering
1128
  if(s->pict_type==B_TYPE && s->last_picture_ptr==NULL) return buf_size;
1129
  
1130
  if(avctx->hurry_up && s->pict_type==B_TYPE) return buf_size;
1131

    
1132
  if(MPV_frame_start(s, avctx) < 0)
1133
      return -1;
1134

    
1135
  /* decode y, u and v components */
1136
  for (i=0; i < 3; i++) {
1137
    int linesize;
1138
    if (i == 0) {
1139
      width  = (s->width+15)&~15;
1140
      height = (s->height+15)&~15;
1141
      linesize= s->linesize;
1142
    } else {
1143
      if(s->flags&CODEC_FLAG_GRAY) break;
1144
      width  = (s->width/4+15)&~15;
1145
      height = (s->height/4+15)&~15;
1146
      linesize= s->uvlinesize;
1147
    }
1148

    
1149
    current  = s->current_picture.data[i];
1150

    
1151
    if(s->pict_type==B_TYPE){
1152
        previous = s->next_picture.data[i];
1153
    }else{
1154
        previous = s->last_picture.data[i];
1155
    }
1156

    
1157
    if (s->pict_type == I_TYPE) {
1158
      /* keyframe */
1159
      for (y=0; y < height; y+=16) {
1160
        for (x=0; x < width; x+=16) {
1161
          result = svq1_decode_block_intra (&s->gb, &current[x], linesize);
1162
          if (result != 0)
1163
          {
1164
#ifdef DEBUG_SVQ1
1165
            printf("Error in svq1_decode_block %i (keyframe)\n",result);
1166
#endif
1167
            return result;
1168
          }
1169
        }
1170
        current += 16*linesize;
1171
      }
1172
    } else {
1173
      svq1_pmv_t pmv[width/8+3];
1174
      /* delta frame */
1175
      memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv_t));
1176

    
1177
      for (y=0; y < height; y+=16) {
1178
        for (x=0; x < width; x+=16) {
1179
          result = svq1_decode_delta_block (s, &s->gb, &current[x], previous,
1180
                                            linesize, pmv, x, y);
1181
          if (result != 0)
1182
          {
1183
#ifdef DEBUG_SVQ1
1184
    printf("Error in svq1_decode_delta_block %i\n",result);
1185
#endif
1186
            return result;
1187
          }
1188
        }
1189

    
1190
        pmv[0].x =
1191
        pmv[0].y = 0;
1192

    
1193
        current += 16*linesize;
1194
      }
1195
    }
1196
  }
1197
  
1198
  *pict = *(AVFrame*)&s->current_picture;
1199

    
1200

    
1201
  MPV_frame_end(s);
1202
  
1203
  *data_size=sizeof(AVFrame);
1204
  return buf_size;
1205
}
1206

    
1207
static int svq1_decode_init(AVCodecContext *avctx)
1208
{
1209
    MpegEncContext *s = avctx->priv_data;
1210

    
1211
    s->avctx = avctx;
1212
    s->width = (avctx->width+3)&~3;
1213
    s->height = (avctx->height+3)&~3;
1214
    s->codec_id= avctx->codec->id;
1215
    avctx->pix_fmt = PIX_FMT_YUV410P;
1216
    avctx->has_b_frames= 1; // not true, but DP frames and these behave like unidirectional b frames
1217
    s->flags= avctx->flags;
1218
    if (MPV_common_init(s) < 0) return -1;
1219
    return 0;
1220
}
1221

    
1222
static int svq1_decode_end(AVCodecContext *avctx)
1223
{
1224
    MpegEncContext *s = avctx->priv_data;
1225

    
1226
    MPV_common_end(s);
1227
    return 0;
1228
}
1229

    
1230
AVCodec svq1_decoder = {
1231
    "svq1",
1232
    CODEC_TYPE_VIDEO,
1233
    CODEC_ID_SVQ1,
1234
    sizeof(MpegEncContext),
1235
    svq1_decode_init,
1236
    NULL,
1237
    svq1_decode_end,
1238
    svq1_decode_frame,
1239
    CODEC_CAP_DR1,
1240
};