libavcodec/aacdectab.h

   1 /*
   2  * AAC decoder data
   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 libavcodec/aacdectab.h
  25  * AAC decoder data
  26  * @author Oded Shimon  ( ods15 ods15 dyndns org )
  27  * @author Maxim Gavrilov ( maxim.gavrilov gmail com )
  28  */
  29
  30 #ifndef AVCODEC_AACDECTAB_H
  31 #define AVCODEC_AACDECTAB_H
  32
  33 #include "aac.h"
  34
  35 #include <stdint.h>
  36
  37 /* @name tns_tmp2_map
  38  * Tables of the tmp2[] arrays of LPC coefficients used for TNS.
  39  * The suffix _M_N[] indicate the values of coef_compress and coef_res
  40  * respectively.
  41  * @{
  42  */
  43 static const float tns_tmp2_map_1_3[4] = {
  44      0.00000000, -0.43388373,  0.64278758,  0.34202015,
  45 };
  46
  47 static const float tns_tmp2_map_0_3[8] = {
  48      0.00000000, -0.43388373, -0.78183150, -0.97492790,
  49      0.98480773,  0.86602539,  0.64278758,  0.34202015,
  50 };
  51
  52 static const float tns_tmp2_map_1_4[8] = {
  53      0.00000000, -0.20791170, -0.40673664, -0.58778524,
  54      0.67369562,  0.52643216,  0.36124167,  0.18374951,
  55 };
  56
  57 static const float tns_tmp2_map_0_4[16] = {
  58      0.00000000, -0.20791170, -0.40673664, -0.58778524,
  59     -0.74314481, -0.86602539, -0.95105654, -0.99452192,
  60      0.99573416,  0.96182561,  0.89516330,  0.79801720,
  61      0.67369562,  0.52643216,  0.36124167,  0.18374951,
  62 };
  63
  64 static const float * const tns_tmp2_map[4] = {
  65     tns_tmp2_map_0_3,
  66     tns_tmp2_map_0_4,
  67     tns_tmp2_map_1_3,
  68     tns_tmp2_map_1_4
  69 };
  70 // @}
  71
  72 static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 };
  73
  74 static const uint8_t aac_channel_layout_map[7][5][2] = {
  75     { { TYPE_SCE, 0 }, },
  76     { { TYPE_CPE, 0 }, },
  77     { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, },
  78     { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_SCE, 1 }, },
  79     { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_CPE, 1 }, },
  80     { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 1 }, },
  81     { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 2 }, { TYPE_CPE, 1 }, },
  82 };
  83
  84 static const int64_t aac_channel_layout[8] = {
  85     CH_LAYOUT_MONO,
  86     CH_LAYOUT_STEREO,
  87     CH_LAYOUT_SURROUND,
  88     CH_LAYOUT_4POINT0,
  89     CH_LAYOUT_5POINT0_BACK,
  90     CH_LAYOUT_5POINT1_BACK,
  91     CH_LAYOUT_7POINT1_WIDE,
  92     0,
  93 };
  94
  95 #endif /* AVCODEC_AACDECTAB_H */