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 )
6 * This file is part of FFmpeg.
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.
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.
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
25 * AAC data declarations
26 * @author Oded Shimon ( ods15 ods15 dyndns org )
27 * @author Maxim Gavrilov ( maxim.gavrilov gmail com )
30 #ifndef AVCODEC_AACTAB_H
31 #define AVCODEC_AACTAB_H
33 #include "libavutil/mem_internal.h"
39 * Tables in this file are shared by the AAC decoders and encoder
42 extern float ff_aac_pow2sf_tab[428];
43 extern float ff_aac_pow34sf_tab[428];
45 void ff_aac_tableinit(void);
48 * Table of the LTP coefficients
50 static const INTFLOAT ltp_coef[8] = {
51 Q30(0.570829), Q30(0.696616), Q30(0.813004), Q30(0.911304),
52 Q30(0.984900), Q30(1.067894), Q30(1.194601), Q30(1.369533),
56 * Tables of the tmp2[] arrays of LPC coefficients used for TNS.
57 * The suffix _M_N[] indicate the values of coef_compress and coef_res
61 static const INTFLOAT tns_tmp2_map_1_3[4] = {
62 Q31(0.00000000), Q31(-0.43388373), Q31(0.64278758), Q31(0.34202015),
65 static const INTFLOAT tns_tmp2_map_0_3[8] = {
66 Q31(0.00000000), Q31(-0.43388373), Q31(-0.78183150), Q31(-0.97492790),
67 Q31(0.98480773), Q31( 0.86602539), Q31( 0.64278758), Q31( 0.34202015),
70 static const INTFLOAT tns_tmp2_map_1_4[8] = {
71 Q31(0.00000000), Q31(-0.20791170), Q31(-0.40673664), Q31(-0.58778524),
72 Q31(0.67369562), Q31( 0.52643216), Q31( 0.36124167), Q31( 0.18374951),
75 static const INTFLOAT tns_tmp2_map_0_4[16] = {
76 Q31( 0.00000000), Q31(-0.20791170), Q31(-0.40673664), Q31(-0.58778524),
77 Q31(-0.74314481), Q31(-0.86602539), Q31(-0.95105654), Q31(-0.99452192),
78 Q31( 0.99573416), Q31( 0.96182561), Q31( 0.89516330), Q31( 0.79801720),
79 Q31( 0.67369562), Q31( 0.52643216), Q31( 0.36124167), Q31( 0.18374951),
82 static const INTFLOAT * const tns_tmp2_map[4] = {
90 /* @name window coefficients
93 DECLARE_ALIGNED(32, extern float, ff_aac_kbd_long_1024)[1024];
94 DECLARE_ALIGNED(32, extern float, ff_aac_kbd_short_128)[128];
95 DECLARE_ALIGNED(32, extern const float, ff_aac_eld_window_512)[1920];
96 DECLARE_ALIGNED(32, extern const int, ff_aac_eld_window_512_fixed)[1920];
97 DECLARE_ALIGNED(32, extern const float, ff_aac_eld_window_480)[1800];
98 DECLARE_ALIGNED(32, extern const int, ff_aac_eld_window_480_fixed)[1800];
101 /* Initializes data shared between float decoder and encoder. */
102 void ff_aac_float_common_init(void);
104 /* @name number of scalefactor window bands for long and short transform windows respectively
107 extern const uint8_t ff_aac_num_swb_1024[];
108 extern const uint8_t ff_aac_num_swb_960 [];
109 extern const uint8_t ff_aac_num_swb_512 [];
110 extern const uint8_t ff_aac_num_swb_480 [];
111 extern const uint8_t ff_aac_num_swb_128 [];
112 extern const uint8_t ff_aac_num_swb_120 [];
115 extern const uint8_t ff_aac_pred_sfb_max [];
117 extern const uint32_t ff_aac_scalefactor_code[121];
118 extern const uint8_t ff_aac_scalefactor_bits[121];
120 extern const uint16_t * const ff_aac_spectral_codes[11];
121 extern const uint8_t * const ff_aac_spectral_bits [11];
122 extern const uint16_t ff_aac_spectral_sizes[11];
124 extern const float *const ff_aac_codebook_vectors[];
125 extern const float *const ff_aac_codebook_vector_vals[];
126 extern const uint16_t *const ff_aac_codebook_vector_idx[];
128 extern const uint16_t * const ff_swb_offset_1024[13];
129 extern const uint16_t * const ff_swb_offset_960 [13];
130 extern const uint16_t * const ff_swb_offset_512 [13];
131 extern const uint16_t * const ff_swb_offset_480 [13];
132 extern const uint16_t * const ff_swb_offset_128 [13];
133 extern const uint16_t * const ff_swb_offset_120 [13];
135 extern const uint8_t ff_tns_max_bands_1024[13];
136 extern const uint8_t ff_tns_max_bands_512 [13];
137 extern const uint8_t ff_tns_max_bands_480 [13];
138 extern const uint8_t ff_tns_max_bands_128 [13];
140 #endif /* AVCODEC_AACTAB_H */