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FFmpeg/libavcodec/mpegvideodata.c

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  1. /*

  2.  * This file is part of Libav.

  3.  *

  4.  * Libav 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.  * Libav 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 Libav; 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. };