mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
210 lines
6.6 KiB
C
210 lines
6.6 KiB
C
/*
|
|
* AAC decoder data
|
|
* Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org )
|
|
* Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com )
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
/**
|
|
* @file aacdectab.h
|
|
* AAC decoder data
|
|
* @author Oded Shimon ( ods15 ods15 dyndns org )
|
|
* @author Maxim Gavrilov ( maxim.gavrilov gmail com )
|
|
*/
|
|
|
|
#ifndef AVCODEC_AACDECTAB_H
|
|
#define AVCODEC_AACDECTAB_H
|
|
|
|
#include "aac.h"
|
|
|
|
#include <stdint.h>
|
|
|
|
/* @name swb_offsets
|
|
* Sample offset into the window indicating the beginning of a scalefactor
|
|
* window band
|
|
*
|
|
* scalefactor window band - term for scalefactor bands within a window,
|
|
* given in Table 4.110 to Table 4.128.
|
|
*
|
|
* scalefactor band - a set of spectral coefficients which are scaled by one
|
|
* scalefactor. In case of EIGHT_SHORT_SEQUENCE and grouping a scalefactor band
|
|
* may contain several scalefactor window bands of corresponding frequency. For
|
|
* all other window_sequences scalefactor bands and scalefactor window bands are
|
|
* identical.
|
|
* @{
|
|
*/
|
|
|
|
static const uint16_t swb_offset_1024_96[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 44, 48, 52, 56, 64,
|
|
72, 80, 88, 96, 108, 120, 132, 144,
|
|
156, 172, 188, 212, 240, 276, 320, 384,
|
|
448, 512, 576, 640, 704, 768, 832, 896,
|
|
960, 1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_128_96[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 32, 40, 48, 64, 92, 128
|
|
};
|
|
|
|
static const uint16_t swb_offset_1024_64[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 44, 48, 52, 56, 64,
|
|
72, 80, 88, 100, 112, 124, 140, 156,
|
|
172, 192, 216, 240, 268, 304, 344, 384,
|
|
424, 464, 504, 544, 584, 624, 664, 704,
|
|
744, 784, 824, 864, 904, 944, 984, 1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_1024_48[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 48, 56, 64, 72, 80,
|
|
88, 96, 108, 120, 132, 144, 160, 176,
|
|
196, 216, 240, 264, 292, 320, 352, 384,
|
|
416, 448, 480, 512, 544, 576, 608, 640,
|
|
672, 704, 736, 768, 800, 832, 864, 896,
|
|
928, 1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_128_48[] = {
|
|
0, 4, 8, 12, 16, 20, 28, 36,
|
|
44, 56, 68, 80, 96, 112, 128
|
|
};
|
|
|
|
static const uint16_t swb_offset_1024_32[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 48, 56, 64, 72, 80,
|
|
88, 96, 108, 120, 132, 144, 160, 176,
|
|
196, 216, 240, 264, 292, 320, 352, 384,
|
|
416, 448, 480, 512, 544, 576, 608, 640,
|
|
672, 704, 736, 768, 800, 832, 864, 896,
|
|
928, 960, 992, 1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_1024_24[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 36, 40, 44, 52, 60, 68, 76,
|
|
84, 92, 100, 108, 116, 124, 136, 148,
|
|
160, 172, 188, 204, 220, 240, 260, 284,
|
|
308, 336, 364, 396, 432, 468, 508, 552,
|
|
600, 652, 704, 768, 832, 896, 960, 1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_128_24[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
36, 44, 52, 64, 76, 92, 108, 128
|
|
};
|
|
|
|
static const uint16_t swb_offset_1024_16[] = {
|
|
0, 8, 16, 24, 32, 40, 48, 56,
|
|
64, 72, 80, 88, 100, 112, 124, 136,
|
|
148, 160, 172, 184, 196, 212, 228, 244,
|
|
260, 280, 300, 320, 344, 368, 396, 424,
|
|
456, 492, 532, 572, 616, 664, 716, 772,
|
|
832, 896, 960, 1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_128_16[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
32, 40, 48, 60, 72, 88, 108, 128
|
|
};
|
|
|
|
static const uint16_t swb_offset_1024_8[] = {
|
|
0, 12, 24, 36, 48, 60, 72, 84,
|
|
96, 108, 120, 132, 144, 156, 172, 188,
|
|
204, 220, 236, 252, 268, 288, 308, 328,
|
|
348, 372, 396, 420, 448, 476, 508, 544,
|
|
580, 620, 664, 712, 764, 820, 880, 944,
|
|
1024
|
|
};
|
|
|
|
static const uint16_t swb_offset_128_8[] = {
|
|
0, 4, 8, 12, 16, 20, 24, 28,
|
|
36, 44, 52, 60, 72, 88, 108, 128
|
|
};
|
|
|
|
static const uint16_t *swb_offset_1024[] = {
|
|
swb_offset_1024_96, swb_offset_1024_96, swb_offset_1024_64,
|
|
swb_offset_1024_48, swb_offset_1024_48, swb_offset_1024_32,
|
|
swb_offset_1024_24, swb_offset_1024_24, swb_offset_1024_16,
|
|
swb_offset_1024_16, swb_offset_1024_16, swb_offset_1024_8
|
|
};
|
|
|
|
static const uint16_t *swb_offset_128[] = {
|
|
/* The last entry on the following row is swb_offset_128_64 but is a
|
|
duplicate of swb_offset_128_96. */
|
|
swb_offset_128_96, swb_offset_128_96, swb_offset_128_96,
|
|
swb_offset_128_48, swb_offset_128_48, swb_offset_128_48,
|
|
swb_offset_128_24, swb_offset_128_24, swb_offset_128_16,
|
|
swb_offset_128_16, swb_offset_128_16, swb_offset_128_8
|
|
};
|
|
|
|
// @}
|
|
|
|
/* @name tns_max_bands
|
|
* The maximum number of scalefactor bands on which TNS can operate for the long
|
|
* and short transforms respectively. The index to these tables is related to
|
|
* the sample rate of the audio.
|
|
* @{
|
|
*/
|
|
static const uint8_t tns_max_bands_1024[] = {
|
|
31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39
|
|
};
|
|
|
|
static const uint8_t tns_max_bands_128[] = {
|
|
9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14
|
|
};
|
|
// @}
|
|
|
|
/* @name tns_tmp2_map
|
|
* Tables of the tmp2[] arrays of LPC coefficients used for TNS.
|
|
* The suffix _M_N[] indicate the values of coef_compress and coef_res
|
|
* respectively.
|
|
* @{
|
|
*/
|
|
static const float tns_tmp2_map_1_3[4] = {
|
|
0.00000000, -0.43388373, 0.64278758, 0.34202015,
|
|
};
|
|
|
|
static const float tns_tmp2_map_0_3[8] = {
|
|
0.00000000, -0.43388373, -0.78183150, -0.97492790,
|
|
0.98480773, 0.86602539, 0.64278758, 0.34202015,
|
|
};
|
|
|
|
static const float tns_tmp2_map_1_4[8] = {
|
|
0.00000000, -0.20791170, -0.40673664, -0.58778524,
|
|
0.67369562, 0.52643216, 0.36124167, 0.18374951,
|
|
};
|
|
|
|
static const float tns_tmp2_map_0_4[16] = {
|
|
0.00000000, -0.20791170, -0.40673664, -0.58778524,
|
|
-0.74314481, -0.86602539, -0.95105654, -0.99452192,
|
|
0.99573416, 0.96182561, 0.89516330, 0.79801720,
|
|
0.67369562, 0.52643216, 0.36124167, 0.18374951,
|
|
};
|
|
|
|
static const float * const tns_tmp2_map[4] = {
|
|
tns_tmp2_map_0_3,
|
|
tns_tmp2_map_0_4,
|
|
tns_tmp2_map_1_3,
|
|
tns_tmp2_map_1_4
|
|
};
|
|
// @}
|
|
|
|
#endif /* AVCODEC_AACDECTAB_H */
|