libavcodec/rv40data.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 rv40data.h
  24  * miscellaneous RV40 tables
  25  */
  26
  27 #ifndef AVCODEC_RV40DATA_H
  28 #define AVCODEC_RV40DATA_H
  29
  30 #include <stdint.h>
  31
  32 /**
  33  * standard widths and heights coded in RV40
  34  */
  35 //@{
  36 static const int rv40_standard_widths[]   = { 160, 172, 240, 320, 352, 640, 704, 0};
  37 static const int rv40_standard_heights[]  = { 120, 132, 144, 240, 288, 480, -8, -10, 180, 360, 576, 0};
  38 //@}
  39
  40 #define MODE2_PATTERNS_NUM 20
  41 /**
  42  * intra types table
  43  *
  44  * These values are actually coded 3-tuples
  45  * used for detecting standard block configurations.
  46  */
  47 static const uint16_t rv40_aic_table_index[MODE2_PATTERNS_NUM] = {
  48  0x000, 0x100, 0x200,
  49  0x011, 0x111, 0x211, 0x511, 0x611,
  50  0x022, 0x122, 0x222, 0x722,
  51  0x272, 0x227,
  52  0x822, 0x282, 0x228,
  53  0x112, 0x116, 0x221
  54 };
  55
  56 /**
  57  * luma quantizer values
  58  * The second table is used for inter blocks.
  59  */
  60 static const uint8_t rv40_luma_dc_quant[2][32] = {
  61  {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  62    16, 17, 17, 18, 18, 18, 19, 19, 19, 20, 20, 20, 22, 22, 22, 22 },
  63  {  0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  64    16, 17, 18, 19, 20, 20, 21, 21, 22, 23, 23, 23, 24, 24, 24, 24 }
  65 };
  66
  67 /**
  68  * @begingroup loopfilter coefficients used by the RV40 loop filter
  69  * @{
  70  */
  71 /**
  72  * dither values for deblocking filter - left/top values
  73  */
  74 static const uint8_t rv40_dither_l[16] = {
  75     0x40, 0x50, 0x20, 0x60, 0x30, 0x50, 0x40, 0x30,
  76     0x50, 0x40, 0x50, 0x30, 0x60, 0x20, 0x50, 0x40
  77 };
  78 /**
  79  * dither values for deblocking filter - right/bottom values
  80  */
  81 static const uint8_t rv40_dither_r[16] = {
  82     0x40, 0x30, 0x60, 0x20, 0x50, 0x30, 0x30, 0x40,
  83     0x40, 0x40, 0x50, 0x30, 0x20, 0x60, 0x30, 0x40
  84 };
  85
  86 /** alpha parameter for RV40 loop filter - almost the same as in JVT-A003r1 */
  87 static const uint8_t rv40_alpha_tab[32] = {
  88     128, 128, 128, 128, 128, 128, 128, 128,
  89     128, 128, 122,  96,  75,  59,  47,  37,
  90      29,  23,  18,  15,  13,  11,  10,   9,
  91       8,   7,   6,   5,   4,   3,   2,   1
  92 };
  93 /** beta parameter for RV40 loop filter - almost the same as in JVT-A003r1 */
  94 static const uint8_t rv40_beta_tab[32] = {
  95      0,  0,  0,  0,  0,  0,  0,  0,  3,  3,  3,  4,  4,  4,  6,  6,
  96      6,  7,  8,  8,  9,  9, 10, 10, 11, 11, 12, 13, 14, 15, 16, 17
  97 };
  98 /** clip table for RV40 loop filter - the same as in JVT-A003r1 */
  99 static const uint8_t rv40_filter_clip_tbl[3][32] = {
 100     {
 101         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
 102         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
 103     },
 104     {
 105         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
 106         1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 5, 5
 107     },
 108     {
 109         0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1,
 110         1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 7, 8, 9
 111     }
 112 };
 113 /** @} */ // end loopfilter group
 114
 115 #endif /* AVCODEC_RV40DATA_H */