ffmpeg/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
  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 */