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  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
  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.  * @name Coefficients used by the RV40 loop filter
  69.  * @{
  70.  */
  71.  
  72. /** alpha parameter for RV40 loop filter - almost the same as in JVT-A003r1 */
  73. static const uint8_t rv40_alpha_tab[32] = {
  74.     128, 128, 128, 128, 128, 128, 128, 128,
  75.     128, 128, 122,  96,  75,  59,  47,  37,
  76.      29,  23,  18,  15,  13,  11,  10,   9,
  77.       8,   7,   6,   5,   4,   3,   2,   1
  78. };
  79. /** beta parameter for RV40 loop filter - almost the same as in JVT-A003r1 */
  80. static const uint8_t rv40_beta_tab[32] = {
  81.      0,  0,  0,  0,  0,  0,  0,  0,  3,  3,  3,  4,  4,  4,  6,  6,
  82.      6,  7,  8,  8,  9,  9, 10, 10, 11, 11, 12, 13, 14, 15, 16, 17
  83. };
  84. /** clip table for RV40 loop filter - the same as in JVT-A003r1 */
  85. static const uint8_t rv40_filter_clip_tbl[3][32] = {
  86.     {
  87.         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
  88.         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  89.     },
  90.     {
  91.         0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1,
  92.         1, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 5, 5
  93.     },
  94.     {
  95.         0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1,
  96.         1, 2, 2, 2, 2, 3, 3, 3, 4, 4, 5, 5, 5, 7, 8, 9
  97.     }
  98. };
  99. /** @} */ // end loopfilter group
  100.  
  101. #endif /* AVCODEC_RV40DATA_H */
  102.