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FFmpeg/libavcodec/qdm2_tablegen.h

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  1. /*

  2.  * Header file for hardcoded QDM2 tables

  3.  *

  4.  * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>

  5.  *

  6.  * This file is part of FFmpeg.

  7.  *

  8.  * FFmpeg is free software; you can redistribute it and/or

  9.  * modify it under the terms of the GNU Lesser General Public

  10.  * License as published by the Free Software Foundation; either

  11.  * version 2.1 of the License, or (at your option) any later version.

  12.  *

  13.  * FFmpeg is distributed in the hope that it will be useful,

  14.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  15.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  16.  * Lesser General Public License for more details.

  17.  *

  18.  * You should have received a copy of the GNU Lesser General Public

  19.  * License along with FFmpeg; if not, write to the Free Software

  20.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  21.  */

  22. 

  23. #ifndef AVCODEC_QDM2_TABLEGEN_H

  24. #define AVCODEC_QDM2_TABLEGEN_H

  25. 

  26. #include <stdint.h>

  27. #include <math.h>

  28. #include "libavutil/attributes.h"

  29. #include "qdm2data.h"

  30. 

  31. #define SOFTCLIP_THRESHOLD 27600

  32. #define HARDCLIP_THRESHOLD 35716

  33. 

  34. #if CONFIG_HARDCODED_TABLES

  35. #define softclip_table_init()

  36. #define rnd_table_init()

  37. #define init_noise_samples()

  38. #define qdm2_init_vlc()

  39. #include "libavcodec/qdm2_tables.h"

  40. #else

  41. static uint16_t softclip_table[HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1];

  42. static float noise_table[4096 + 20];

  43. static uint8_t random_dequant_index[256][5];

  44. static uint8_t random_dequant_type24[128][3];

  45. static float noise_samples[128];

  46. 

  47. static av_cold void softclip_table_init(void) {

  48.     int i;

  49.     double dfl = SOFTCLIP_THRESHOLD - 32767;

  50.     float delta = 1.0 / -dfl;

  51.     for (i = 0; i < HARDCLIP_THRESHOLD - SOFTCLIP_THRESHOLD + 1; i++)

  52.         softclip_table[i] = SOFTCLIP_THRESHOLD - ((int)(sin((float)i * delta) * dfl) & 0x0000FFFF);

  53. }

  54. 

  55. 

  56. // random generated table

  57. static av_cold void rnd_table_init(void) {

  58.     int i,j;

  59.     uint32_t ldw;

  60.     uint64_t random_seed = 0;

  61.     float delta = 1.0 / 16384.0;

  62.     for(i = 0; i < 4096 ;i++) {

  63.         random_seed = random_seed * 214013 + 2531011;

  64.         noise_table[i] = (delta * (float)(((int32_t)random_seed >> 16) & 0x00007FFF)- 1.0) * 1.3;

  65.     }

  66. 

  67.     for (i = 0; i < 256 ;i++) {

  68.         random_seed = 81;

  69.         ldw = i;

  70.         for (j = 0; j < 5 ;j++) {

  71.             random_dequant_index[i][j] = ldw / random_seed;

  72.             ldw %= random_seed;

  73.             random_seed /= 3;

  74.         }

  75.     }

  76.     for (i = 0; i < 128 ;i++) {

  77.         random_seed = 25;

  78.         ldw = i;

  79.         for (j = 0; j < 3 ;j++) {

  80.             random_dequant_type24[i][j] = ldw / random_seed;

  81.             ldw %= random_seed;

  82.             random_seed /= 5;

  83.         }

  84.     }

  85. }

  86. 

  87. 

  88. static av_cold void init_noise_samples(void) {

  89.     int i;

  90.     unsigned random_seed = 0;

  91.     float delta = 1.0 / 16384.0;

  92.     for (i = 0; i < 128;i++) {

  93.         random_seed = random_seed * 214013 + 2531011;

  94.         noise_samples[i] = (delta * (float)((random_seed >> 16) & 0x00007fff) - 1.0);

  95.     }

  96. }

  97. 

  98. static VLC vlc_tab_level;

  99. static VLC vlc_tab_diff;

  100. static VLC vlc_tab_run;

  101. static VLC fft_level_exp_alt_vlc;

  102. static VLC fft_level_exp_vlc;

  103. static VLC fft_stereo_exp_vlc;

  104. static VLC fft_stereo_phase_vlc;

  105. static VLC vlc_tab_tone_level_idx_hi1;

  106. static VLC vlc_tab_tone_level_idx_mid;

  107. static VLC vlc_tab_tone_level_idx_hi2;

  108. static VLC vlc_tab_type30;

  109. static VLC vlc_tab_type34;

  110. static VLC vlc_tab_fft_tone_offset[5];

  111. 

  112. static const uint16_t qdm2_vlc_offs[] = {

  113.     0,260,566,598,894,1166,1230,1294,1678,1950,2214,2278,2310,2570,2834,3124,3448,3838,

  114. };

  115. 

  116. static VLC_TYPE qdm2_table[3838][2];

  117. 

  118. static av_cold void qdm2_init_vlc(void)

  119. {

  120.     vlc_tab_level.table           = &qdm2_table[qdm2_vlc_offs[0]];

  121.     vlc_tab_level.table_allocated = qdm2_vlc_offs[1] - qdm2_vlc_offs[0];

  122.     init_vlc(&vlc_tab_level, 8, 24,

  123.              vlc_tab_level_huffbits, 1, 1,

  124.              vlc_tab_level_huffcodes, 2, 2,

  125.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  126. 

  127.     vlc_tab_diff.table           = &qdm2_table[qdm2_vlc_offs[1]];

  128.     vlc_tab_diff.table_allocated = qdm2_vlc_offs[2] - qdm2_vlc_offs[1];

  129.     init_vlc(&vlc_tab_diff, 8, 37,

  130.              vlc_tab_diff_huffbits, 1, 1,

  131.              vlc_tab_diff_huffcodes, 2, 2,

  132.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  133. 

  134.     vlc_tab_run.table           = &qdm2_table[qdm2_vlc_offs[2]];

  135.     vlc_tab_run.table_allocated = qdm2_vlc_offs[3] - qdm2_vlc_offs[2];

  136.     init_vlc(&vlc_tab_run, 5, 6,

  137.              vlc_tab_run_huffbits, 1, 1,

  138.              vlc_tab_run_huffcodes, 1, 1,

  139.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  140. 

  141.     fft_level_exp_alt_vlc.table           = &qdm2_table[qdm2_vlc_offs[3]];

  142.     fft_level_exp_alt_vlc.table_allocated = qdm2_vlc_offs[4] -

  143.                                             qdm2_vlc_offs[3];

  144.     init_vlc(&fft_level_exp_alt_vlc, 8, 28,

  145.              fft_level_exp_alt_huffbits, 1, 1,

  146.              fft_level_exp_alt_huffcodes, 2, 2,

  147.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  148. 

  149.     fft_level_exp_vlc.table           = &qdm2_table[qdm2_vlc_offs[4]];

  150.     fft_level_exp_vlc.table_allocated = qdm2_vlc_offs[5] - qdm2_vlc_offs[4];

  151.     init_vlc(&fft_level_exp_vlc, 8, 20,

  152.              fft_level_exp_huffbits, 1, 1,

  153.              fft_level_exp_huffcodes, 2, 2,

  154.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  155. 

  156.     fft_stereo_exp_vlc.table           = &qdm2_table[qdm2_vlc_offs[5]];

  157.     fft_stereo_exp_vlc.table_allocated = qdm2_vlc_offs[6] -

  158.                                          qdm2_vlc_offs[5];

  159.     init_vlc(&fft_stereo_exp_vlc, 6, 7,

  160.              fft_stereo_exp_huffbits, 1, 1,

  161.              fft_stereo_exp_huffcodes, 1, 1,

  162.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  163. 

  164.     fft_stereo_phase_vlc.table           = &qdm2_table[qdm2_vlc_offs[6]];

  165.     fft_stereo_phase_vlc.table_allocated = qdm2_vlc_offs[7] -

  166.                                            qdm2_vlc_offs[6];

  167.     init_vlc(&fft_stereo_phase_vlc, 6, 9,

  168.              fft_stereo_phase_huffbits, 1, 1,

  169.              fft_stereo_phase_huffcodes, 1, 1,

  170.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  171. 

  172.     vlc_tab_tone_level_idx_hi1.table =

  173.         &qdm2_table[qdm2_vlc_offs[7]];

  174.     vlc_tab_tone_level_idx_hi1.table_allocated = qdm2_vlc_offs[8] -

  175.                                                  qdm2_vlc_offs[7];

  176.     init_vlc(&vlc_tab_tone_level_idx_hi1, 8, 20,

  177.              vlc_tab_tone_level_idx_hi1_huffbits, 1, 1,

  178.              vlc_tab_tone_level_idx_hi1_huffcodes, 2, 2,

  179.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  180. 

  181.     vlc_tab_tone_level_idx_mid.table =

  182.         &qdm2_table[qdm2_vlc_offs[8]];

  183.     vlc_tab_tone_level_idx_mid.table_allocated = qdm2_vlc_offs[9] -

  184.                                                  qdm2_vlc_offs[8];

  185.     init_vlc(&vlc_tab_tone_level_idx_mid, 8, 24,

  186.              vlc_tab_tone_level_idx_mid_huffbits, 1, 1,

  187.              vlc_tab_tone_level_idx_mid_huffcodes, 2, 2,

  188.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  189. 

  190.     vlc_tab_tone_level_idx_hi2.table =

  191.         &qdm2_table[qdm2_vlc_offs[9]];

  192.     vlc_tab_tone_level_idx_hi2.table_allocated = qdm2_vlc_offs[10] -

  193.                                                  qdm2_vlc_offs[9];

  194.     init_vlc(&vlc_tab_tone_level_idx_hi2, 8, 24,

  195.              vlc_tab_tone_level_idx_hi2_huffbits, 1, 1,

  196.              vlc_tab_tone_level_idx_hi2_huffcodes, 2, 2,

  197.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  198. 

  199.     vlc_tab_type30.table           = &qdm2_table[qdm2_vlc_offs[10]];

  200.     vlc_tab_type30.table_allocated = qdm2_vlc_offs[11] - qdm2_vlc_offs[10];

  201.     init_vlc(&vlc_tab_type30, 6, 9,

  202.              vlc_tab_type30_huffbits, 1, 1,

  203.              vlc_tab_type30_huffcodes, 1, 1,

  204.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  205. 

  206.     vlc_tab_type34.table           = &qdm2_table[qdm2_vlc_offs[11]];

  207.     vlc_tab_type34.table_allocated = qdm2_vlc_offs[12] - qdm2_vlc_offs[11];

  208.     init_vlc(&vlc_tab_type34, 5, 10,

  209.              vlc_tab_type34_huffbits, 1, 1,

  210.              vlc_tab_type34_huffcodes, 1, 1,

  211.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  212. 

  213.     vlc_tab_fft_tone_offset[0].table =

  214.         &qdm2_table[qdm2_vlc_offs[12]];

  215.     vlc_tab_fft_tone_offset[0].table_allocated = qdm2_vlc_offs[13] -

  216.                                                  qdm2_vlc_offs[12];

  217.     init_vlc(&vlc_tab_fft_tone_offset[0], 8, 23,

  218.              vlc_tab_fft_tone_offset_0_huffbits, 1, 1,

  219.              vlc_tab_fft_tone_offset_0_huffcodes, 2, 2,

  220.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  221. 

  222.     vlc_tab_fft_tone_offset[1].table =

  223.         &qdm2_table[qdm2_vlc_offs[13]];

  224.     vlc_tab_fft_tone_offset[1].table_allocated = qdm2_vlc_offs[14] -

  225.                                                  qdm2_vlc_offs[13];

  226.     init_vlc(&vlc_tab_fft_tone_offset[1], 8, 28,

  227.              vlc_tab_fft_tone_offset_1_huffbits, 1, 1,

  228.              vlc_tab_fft_tone_offset_1_huffcodes, 2, 2,

  229.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  230. 

  231.     vlc_tab_fft_tone_offset[2].table =

  232.         &qdm2_table[qdm2_vlc_offs[14]];

  233.     vlc_tab_fft_tone_offset[2].table_allocated = qdm2_vlc_offs[15] -

  234.                                                  qdm2_vlc_offs[14];

  235.     init_vlc(&vlc_tab_fft_tone_offset[2], 8, 32,

  236.              vlc_tab_fft_tone_offset_2_huffbits, 1, 1,

  237.              vlc_tab_fft_tone_offset_2_huffcodes, 2, 2,

  238.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  239. 

  240.     vlc_tab_fft_tone_offset[3].table =

  241.         &qdm2_table[qdm2_vlc_offs[15]];

  242.     vlc_tab_fft_tone_offset[3].table_allocated = qdm2_vlc_offs[16] -

  243.                                                  qdm2_vlc_offs[15];

  244.     init_vlc(&vlc_tab_fft_tone_offset[3], 8, 35,

  245.              vlc_tab_fft_tone_offset_3_huffbits, 1, 1,

  246.              vlc_tab_fft_tone_offset_3_huffcodes, 2, 2,

  247.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  248. 

  249.     vlc_tab_fft_tone_offset[4].table =

  250.         &qdm2_table[qdm2_vlc_offs[16]];

  251.     vlc_tab_fft_tone_offset[4].table_allocated = qdm2_vlc_offs[17] -

  252.                                                  qdm2_vlc_offs[16];

  253.     init_vlc(&vlc_tab_fft_tone_offset[4], 8, 38,

  254.              vlc_tab_fft_tone_offset_4_huffbits, 1, 1,

  255.              vlc_tab_fft_tone_offset_4_huffcodes, 2, 2,

  256.              INIT_VLC_USE_NEW_STATIC | INIT_VLC_LE);

  257. }

  258. 

  259. #endif /* CONFIG_HARDCODED_TABLES */

  260. 

  261. #endif /* AVCODEC_QDM2_TABLEGEN_H */