libavcodec/rv34data.h

   1 /*
   2  * RealVideo 4 decoder
   3  * copyright (c) 2007 Konstantin Shishkov
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 /**
  23  * @file libavcodec/rv34data.h
  24  * miscellaneous RV30/40 tables
  25  */
  26
  27 #ifndef AVCODEC_RV34DATA_H
  28 #define AVCODEC_RV34DATA_H
  29
  30 #include <stdint.h>
  31
  32 /**
  33  * number of ones in nibble minus one
  34  */
  35 static const uint8_t rv34_count_ones[16] = {
  36     0, 0, 0, 1, 0, 1, 1, 2, 0, 1, 1, 2, 1, 2, 2, 3
  37 };
  38
  39 /**
  40  * values used to reconstruct coded block pattern
  41  */
  42 static const uint8_t rv34_cbp_code[16] = {
  43     0x00, 0x20, 0x10, 0x30, 0x02, 0x22, 0x12, 0x32,
  44     0x01, 0x21, 0x11, 0x31, 0x03, 0x23, 0x13, 0x33
  45 };
  46
  47 /**
  48  * precalculated results of division by three and modulo three for values 0-107
  49  *
  50  * A lot of four-tuples in RV40 are represented as c0*27+c1*9+c2*3+c3.
  51  * This table allows conversion from a value back to a vector.
  52  */
  53 static const uint8_t modulo_three_table[108][4] = {
  54  { 0, 0, 0, 0 }, { 0, 0, 0, 1 }, { 0, 0, 0, 2 }, { 0, 0, 1, 0 },
  55  { 0, 0, 1, 1 }, { 0, 0, 1, 2 }, { 0, 0, 2, 0 }, { 0, 0, 2, 1 },
  56  { 0, 0, 2, 2 }, { 0, 1, 0, 0 }, { 0, 1, 0, 1 }, { 0, 1, 0, 2 },
  57  { 0, 1, 1, 0 }, { 0, 1, 1, 1 }, { 0, 1, 1, 2 }, { 0, 1, 2, 0 },
  58  { 0, 1, 2, 1 }, { 0, 1, 2, 2 }, { 0, 2, 0, 0 }, { 0, 2, 0, 1 },
  59  { 0, 2, 0, 2 }, { 0, 2, 1, 0 }, { 0, 2, 1, 1 }, { 0, 2, 1, 2 },
  60  { 0, 2, 2, 0 }, { 0, 2, 2, 1 }, { 0, 2, 2, 2 }, { 1, 0, 0, 0 },
  61  { 1, 0, 0, 1 }, { 1, 0, 0, 2 }, { 1, 0, 1, 0 }, { 1, 0, 1, 1 },
  62  { 1, 0, 1, 2 }, { 1, 0, 2, 0 }, { 1, 0, 2, 1 }, { 1, 0, 2, 2 },
  63  { 1, 1, 0, 0 }, { 1, 1, 0, 1 }, { 1, 1, 0, 2 }, { 1, 1, 1, 0 },
  64  { 1, 1, 1, 1 }, { 1, 1, 1, 2 }, { 1, 1, 2, 0 }, { 1, 1, 2, 1 },
  65  { 1, 1, 2, 2 }, { 1, 2, 0, 0 }, { 1, 2, 0, 1 }, { 1, 2, 0, 2 },
  66  { 1, 2, 1, 0 }, { 1, 2, 1, 1 }, { 1, 2, 1, 2 }, { 1, 2, 2, 0 },
  67  { 1, 2, 2, 1 }, { 1, 2, 2, 2 }, { 2, 0, 0, 0 }, { 2, 0, 0, 1 },
  68  { 2, 0, 0, 2 }, { 2, 0, 1, 0 }, { 2, 0, 1, 1 }, { 2, 0, 1, 2 },
  69  { 2, 0, 2, 0 }, { 2, 0, 2, 1 }, { 2, 0, 2, 2 }, { 2, 1, 0, 0 },
  70  { 2, 1, 0, 1 }, { 2, 1, 0, 2 }, { 2, 1, 1, 0 }, { 2, 1, 1, 1 },
  71  { 2, 1, 1, 2 }, { 2, 1, 2, 0 }, { 2, 1, 2, 1 }, { 2, 1, 2, 2 },
  72  { 2, 2, 0, 0 }, { 2, 2, 0, 1 }, { 2, 2, 0, 2 }, { 2, 2, 1, 0 },
  73  { 2, 2, 1, 1 }, { 2, 2, 1, 2 }, { 2, 2, 2, 0 }, { 2, 2, 2, 1 },
  74  { 2, 2, 2, 2 }, { 3, 0, 0, 0 }, { 3, 0, 0, 1 }, { 3, 0, 0, 2 },
  75  { 3, 0, 1, 0 }, { 3, 0, 1, 1 }, { 3, 0, 1, 2 }, { 3, 0, 2, 0 },
  76  { 3, 0, 2, 1 }, { 3, 0, 2, 2 }, { 3, 1, 0, 0 }, { 3, 1, 0, 1 },
  77  { 3, 1, 0, 2 }, { 3, 1, 1, 0 }, { 3, 1, 1, 1 }, { 3, 1, 1, 2 },
  78  { 3, 1, 2, 0 }, { 3, 1, 2, 1 }, { 3, 1, 2, 2 }, { 3, 2, 0, 0 },
  79  { 3, 2, 0, 1 }, { 3, 2, 0, 2 }, { 3, 2, 1, 0 }, { 3, 2, 1, 1 },
  80  { 3, 2, 1, 2 }, { 3, 2, 2, 0 }, { 3, 2, 2, 1 }, { 3, 2, 2, 2 },
  81 };
  82
  83 /**
  84  * quantizer values used for AC and DC coefficients in chroma blocks
  85  */
  86 static const uint8_t rv34_chroma_quant[2][32] = {
  87  {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  88    16, 17, 17, 18, 19, 20, 20, 21, 22, 22, 23, 23, 24, 24, 25, 25 },
  89  {  0,  0,  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13,
  90    14, 15, 15, 16, 17, 18, 18, 19, 20, 20, 21, 21, 22, 22, 23, 23 }
  91 };
  92
  93 /**
  94  * This table is used for dequantizing.
  95  */
  96 static const uint16_t rv34_qscale_tab[32] = {
  97   60,   67,   76,   85,   96,  108,  121,  136,
  98  152,  171,  192,  216,  242,  272,  305,  341,
  99  383,  432,  481,  544,  606,  683,  767,  854,
 100  963, 1074, 1212, 1392, 1566, 1708, 1978, 2211
 101 };
 102
 103 /**
 104  * 4x4 dezigzag pattern
 105  */
 106 static const uint8_t rv34_dezigzag[16] = {
 107   0,  1,  8, 16,
 108   9,  2,  3, 10,
 109  17, 24, 25, 18,
 110  11, 19, 26, 27
 111 };
 112
 113 /**
 114  * tables used to translate a quantizer value into a VLC set for decoding
 115  * The first table is used for intraframes.
 116  */
 117 static const uint8_t rv34_quant_to_vlc_set[2][31] = {
 118  { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
 119    2, 2, 2, 2, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 0 },
 120  { 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3,
 121    3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6 },
 122 };
 123
 124 /**
 125  * table for obtaining the quantizer difference
 126  * @todo Use with modified_quant_tab from h263data.h.
 127  */
 128 static const uint8_t rv34_dquant_tab[2][32]={
 129 //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
 130 {
 131     0, 3, 1, 2, 3, 4, 5, 6, 7, 8, 9, 9,10,11,12,13,14,15,16,17,18,18,19,20,21,22,23,24,25,26,27,28
 132 },{
 133     0, 2, 3, 4, 5, 6, 7, 8, 9,10,11,13,14,15,16,17,18,19,20,21,22,24,25,26,27,28,29,30,31,31,31,26
 134 }
 135 };
 136
 137 /**
 138  * maximum number of macroblocks for each of the possible slice offset sizes
 139  * @todo This is the same as ff_mba_max, maybe use it instead.
 140  */
 141 static const uint16_t rv34_mb_max_sizes[6] = { 0x2F, 0x62, 0x18B, 0x62F, 0x18BF, 0x23FF };
 142 /**
 143  * bits needed to code the slice offset for the given size
 144  * @todo This is the same as ff_mba_length, maybe use it instead.
 145  */
 146 static const uint8_t rv34_mb_bits_sizes[6] = { 6, 7, 9, 11, 13, 14 };
 147
 148 #endif /* AVCODEC_RV34DATA_H */