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  1. /*
  2.  * AAC data declarations
  3.  * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
  4.  * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
  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. /**
  24.  * @file
  25.  * AAC data declarations
  26.  * @author Oded Shimon  ( ods15 ods15 dyndns org )
  27.  * @author Maxim Gavrilov ( maxim.gavrilov gmail com )
  28.  */
  29.  
  30. #ifndef AVCODEC_AACTAB_H
  31. #define AVCODEC_AACTAB_H
  32.  
  33. #include "libavutil/mem.h"
  34. #include "aac.h"
  35. #include "aac_tablegen_decl.h"
  36.  
  37. #include <stdint.h>
  38.  
  39. /* NOTE:
  40.  * Tables in this file are used by the AAC decoder and will be used by the AAC
  41.  * encoder.
  42.  */
  43.  
  44. /* @name tns_tmp2_map
  45.  * Tables of the tmp2[] arrays of LPC coefficients used for TNS.
  46.  * The suffix _M_N[] indicate the values of coef_compress and coef_res
  47.  * respectively.
  48.  * @{
  49.  */
  50. static const INTFLOAT tns_tmp2_map_1_3[4] = {
  51.     Q31(0.00000000f), Q31(-0.43388373f),  Q31(0.64278758f),  Q31(0.34202015f),
  52. };
  53.  
  54. static const INTFLOAT tns_tmp2_map_0_3[8] = {
  55.     Q31(0.00000000f), Q31(-0.43388373f), Q31(-0.78183150f), Q31(-0.97492790f),
  56.     Q31(0.98480773f), Q31( 0.86602539f), Q31( 0.64278758f), Q31( 0.34202015f),
  57. };
  58.  
  59. static const INTFLOAT tns_tmp2_map_1_4[8] = {
  60.     Q31(0.00000000f), Q31(-0.20791170f), Q31(-0.40673664f), Q31(-0.58778524f),
  61.     Q31(0.67369562f), Q31( 0.52643216f), Q31( 0.36124167f), Q31( 0.18374951f),
  62. };
  63.  
  64. static const INTFLOAT tns_tmp2_map_0_4[16] = {
  65.     Q31( 0.00000000f), Q31(-0.20791170f), Q31(-0.40673664f), Q31(-0.58778524f),
  66.     Q31(-0.74314481f), Q31(-0.86602539f), Q31(-0.95105654f), Q31(-0.99452192f),
  67.     Q31( 0.99573416f), Q31( 0.96182561f), Q31( 0.89516330f), Q31( 0.79801720f),
  68.     Q31( 0.67369562f), Q31( 0.52643216f), Q31( 0.36124167f), Q31( 0.18374951f),
  69. };
  70.  
  71. static const INTFLOAT * const tns_tmp2_map[4] = {
  72.     tns_tmp2_map_0_3,
  73.     tns_tmp2_map_0_4,
  74.     tns_tmp2_map_1_3,
  75.     tns_tmp2_map_1_4
  76. };
  77. // @}
  78.  
  79. /* @name window coefficients
  80.  * @{
  81.  */
  82. DECLARE_ALIGNED(32, extern float,  ff_aac_kbd_long_1024)[1024];
  83. DECLARE_ALIGNED(32, extern float,  ff_aac_kbd_short_128)[128];
  84. DECLARE_ALIGNED(32, extern int,    ff_aac_kbd_long_1024_fixed)[1024];
  85. DECLARE_ALIGNED(32, extern int,    ff_aac_kbd_long_512_fixed)[512];
  86. DECLARE_ALIGNED(32, extern int,    ff_aac_kbd_short_128_fixed)[128];
  87. const DECLARE_ALIGNED(32, extern float, ff_aac_eld_window_512)[1920];
  88. const DECLARE_ALIGNED(32, extern int,   ff_aac_eld_window_512_fixed)[1920];
  89. const DECLARE_ALIGNED(32, extern float, ff_aac_eld_window_480)[1800];
  90. const DECLARE_ALIGNED(32, extern int,   ff_aac_eld_window_480_fixed)[1800];
  91. // @}
  92.  
  93. /* @name number of scalefactor window bands for long and short transform windows respectively
  94.  * @{
  95.  */
  96. extern const uint8_t ff_aac_num_swb_1024[];
  97. extern const uint8_t ff_aac_num_swb_512 [];
  98. extern const uint8_t ff_aac_num_swb_480 [];
  99. extern const uint8_t ff_aac_num_swb_128 [];
  100. // @}
  101.  
  102. extern const uint8_t ff_aac_pred_sfb_max [];
  103.  
  104. extern const uint32_t ff_aac_scalefactor_code[121];
  105. extern const uint8_t  ff_aac_scalefactor_bits[121];
  106.  
  107. extern const uint16_t * const ff_aac_spectral_codes[11];
  108. extern const uint8_t  * const ff_aac_spectral_bits [11];
  109. extern const uint16_t  ff_aac_spectral_sizes[11];
  110.  
  111. extern const float *ff_aac_codebook_vectors[];
  112. extern const float *ff_aac_codebook_vector_vals[];
  113. extern const uint16_t *ff_aac_codebook_vector_idx[];
  114.  
  115. extern const uint16_t * const ff_swb_offset_1024[13];
  116. extern const uint16_t * const ff_swb_offset_512 [13];
  117. extern const uint16_t * const ff_swb_offset_480 [13];
  118. extern const uint16_t * const ff_swb_offset_128 [13];
  119.  
  120. extern const uint8_t ff_tns_max_bands_1024[13];
  121. extern const uint8_t ff_tns_max_bands_512 [13];
  122. extern const uint8_t ff_tns_max_bands_480 [13];
  123. extern const uint8_t ff_tns_max_bands_128 [13];
  124.  
  125. #endif /* AVCODEC_AACTAB_H */
  126.