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  1. /*
  2.  * This file is part of FFmpeg.
  3.  *
  4.  * FFmpeg is free software; you can redistribute it and/or
  5.  * modify it under the terms of the GNU Lesser General Public
  6.  * License as published by the Free Software Foundation; either
  7.  * version 2.1 of the License, or (at your option) any later version.
  8.  *
  9.  * FFmpeg is distributed in the hope that it will be useful,
  10.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12.  * Lesser General Public License for more details.
  13.  *
  14.  * You should have received a copy of the GNU Lesser General Public
  15.  * License along with FFmpeg; if not, write to the Free Software
  16.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  17.  */
  18.  
  19. #include <stdint.h>
  20.  
  21. const uint8_t ff_default_chroma_qscale_table[32] = {
  22. //   0   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
  23.      0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15,
  24.     16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
  25. };
  26.  
  27. const uint8_t ff_mpeg1_dc_scale_table[128] = {
  28. //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
  29.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  30.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  31.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  32.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  33.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  34.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  35.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  36.     8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
  37. };
  38.  
  39. static const uint8_t mpeg2_dc_scale_table1[128] = {
  40. //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
  41.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  42.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  43.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  44.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  45.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  46.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  47.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  48.     4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
  49. };
  50.  
  51. static const uint8_t mpeg2_dc_scale_table2[128] = {
  52. //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
  53.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  54.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  55.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  56.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  57.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  58.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  59.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  60.     2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
  61. };
  62.  
  63. static const uint8_t mpeg2_dc_scale_table3[128] = {
  64. //  0  1  2  3  4  5  6  7  8  9 10 11 12 13 14 15
  65.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  66.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  67.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  68.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  69.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  70.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  71.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  72.     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
  73. };
  74.  
  75. const uint8_t *const ff_mpeg2_dc_scale_table[4] = {
  76.     ff_mpeg1_dc_scale_table,
  77.     mpeg2_dc_scale_table1,
  78.     mpeg2_dc_scale_table2,
  79.     mpeg2_dc_scale_table3,
  80. };
  81.  
  82. const uint8_t ff_alternate_horizontal_scan[64] = {
  83.      0,  1,  2,  3,  8,  9, 16, 17,
  84.     10, 11,  4,  5,  6,  7, 15, 14,
  85.     13, 12, 19, 18, 24, 25, 32, 33,
  86.     26, 27, 20, 21, 22, 23, 28, 29,
  87.     30, 31, 34, 35, 40, 41, 48, 49,
  88.     42, 43, 36, 37, 38, 39, 44, 45,
  89.     46, 47, 50, 51, 56, 57, 58, 59,
  90.     52, 53, 54, 55, 60, 61, 62, 63,
  91. };
  92.  
  93. const uint8_t ff_alternate_vertical_scan[64] = {
  94.      0,  8, 16, 24,  1,  9,  2, 10,
  95.     17, 25, 32, 40, 48, 56, 57, 49,
  96.     41, 33, 26, 18,  3, 11,  4, 12,
  97.     19, 27, 34, 42, 50, 58, 35, 43,
  98.     51, 59, 20, 28,  5, 13,  6, 14,
  99.     21, 29, 36, 44, 52, 60, 37, 45,
  100.     53, 61, 22, 30,  7, 15, 23, 31,
  101.     38, 46, 54, 62, 39, 47, 55, 63,
  102. };
  103.