Libav
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00001 /* 00002 * AAC decoder data 00003 * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org ) 00004 * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com ) 00005 * 00006 * This file is part of FFmpeg. 00007 * 00008 * FFmpeg is free software; you can redistribute it and/or 00009 * modify it under the terms of the GNU Lesser General Public 00010 * License as published by the Free Software Foundation; either 00011 * version 2.1 of the License, or (at your option) any later version. 00012 * 00013 * FFmpeg is distributed in the hope that it will be useful, 00014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00016 * Lesser General Public License for more details. 00017 * 00018 * You should have received a copy of the GNU Lesser General Public 00019 * License along with FFmpeg; if not, write to the Free Software 00020 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00021 */ 00022 00030 #ifndef AVCODEC_AACDECTAB_H 00031 #define AVCODEC_AACDECTAB_H 00032 00033 #include "aac.h" 00034 00035 #include <stdint.h> 00036 00037 /* @name tns_tmp2_map 00038 * Tables of the tmp2[] arrays of LPC coefficients used for TNS. 00039 * The suffix _M_N[] indicate the values of coef_compress and coef_res 00040 * respectively. 00041 * @{ 00042 */ 00043 static const float tns_tmp2_map_1_3[4] = { 00044 0.00000000, -0.43388373, 0.64278758, 0.34202015, 00045 }; 00046 00047 static const float tns_tmp2_map_0_3[8] = { 00048 0.00000000, -0.43388373, -0.78183150, -0.97492790, 00049 0.98480773, 0.86602539, 0.64278758, 0.34202015, 00050 }; 00051 00052 static const float tns_tmp2_map_1_4[8] = { 00053 0.00000000, -0.20791170, -0.40673664, -0.58778524, 00054 0.67369562, 0.52643216, 0.36124167, 0.18374951, 00055 }; 00056 00057 static const float tns_tmp2_map_0_4[16] = { 00058 0.00000000, -0.20791170, -0.40673664, -0.58778524, 00059 -0.74314481, -0.86602539, -0.95105654, -0.99452192, 00060 0.99573416, 0.96182561, 0.89516330, 0.79801720, 00061 0.67369562, 0.52643216, 0.36124167, 0.18374951, 00062 }; 00063 00064 static const float * const tns_tmp2_map[4] = { 00065 tns_tmp2_map_0_3, 00066 tns_tmp2_map_0_4, 00067 tns_tmp2_map_1_3, 00068 tns_tmp2_map_1_4 00069 }; 00070 // @} 00071 00072 static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 }; 00073 00074 static const uint8_t aac_channel_layout_map[7][5][2] = { 00075 { { TYPE_SCE, 0 }, }, 00076 { { TYPE_CPE, 0 }, }, 00077 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, }, 00078 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_SCE, 1 }, }, 00079 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_CPE, 1 }, }, 00080 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 1 }, }, 00081 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 2 }, { TYPE_CPE, 1 }, }, 00082 }; 00083 00084 static const int64_t aac_channel_layout[8] = { 00085 CH_LAYOUT_MONO, 00086 CH_LAYOUT_STEREO, 00087 CH_LAYOUT_SURROUND, 00088 CH_LAYOUT_4POINT0, 00089 CH_LAYOUT_5POINT0_BACK, 00090 CH_LAYOUT_5POINT1_BACK, 00091 CH_LAYOUT_7POINT1_WIDE, 00092 0, 00093 }; 00094 00095 #endif /* AVCODEC_AACDECTAB_H */