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 Libav. 7 * 8 * Libav 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 * Libav 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 Libav; 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 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 "libavutil/audioconvert.h" 34#include "aac.h" 35 36#include <stdint.h> 37 38/* @name ltp_coef 39 * Table of the LTP coefficients 40 */ 41static const float ltp_coef[8] = { 42 0.570829, 0.696616, 0.813004, 0.911304, 43 0.984900, 1.067894, 1.194601, 1.369533, 44}; 45 46/* @name tns_tmp2_map 47 * Tables of the tmp2[] arrays of LPC coefficients used for TNS. 48 * The suffix _M_N[] indicate the values of coef_compress and coef_res 49 * respectively. 50 * @{ 51 */ 52static const float tns_tmp2_map_1_3[4] = { 53 0.00000000, -0.43388373, 0.64278758, 0.34202015, 54}; 55 56static const float tns_tmp2_map_0_3[8] = { 57 0.00000000, -0.43388373, -0.78183150, -0.97492790, 58 0.98480773, 0.86602539, 0.64278758, 0.34202015, 59}; 60 61static const float tns_tmp2_map_1_4[8] = { 62 0.00000000, -0.20791170, -0.40673664, -0.58778524, 63 0.67369562, 0.52643216, 0.36124167, 0.18374951, 64}; 65 66static const float tns_tmp2_map_0_4[16] = { 67 0.00000000, -0.20791170, -0.40673664, -0.58778524, 68 -0.74314481, -0.86602539, -0.95105654, -0.99452192, 69 0.99573416, 0.96182561, 0.89516330, 0.79801720, 70 0.67369562, 0.52643216, 0.36124167, 0.18374951, 71}; 72 73static const float * const tns_tmp2_map[4] = { 74 tns_tmp2_map_0_3, 75 tns_tmp2_map_0_4, 76 tns_tmp2_map_1_3, 77 tns_tmp2_map_1_4 78}; 79// @} 80 81static const int8_t tags_per_config[16] = { 0, 1, 1, 2, 3, 3, 4, 5, 0, 0, 0, 0, 0, 0, 0, 0 }; 82 83static const uint8_t aac_channel_layout_map[7][5][2] = { 84 { { TYPE_SCE, 0 }, }, 85 { { TYPE_CPE, 0 }, }, 86 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, }, 87 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_SCE, 1 }, }, 88 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_CPE, 1 }, }, 89 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 1 }, }, 90 { { TYPE_CPE, 0 }, { TYPE_SCE, 0 }, { TYPE_LFE, 0 }, { TYPE_CPE, 2 }, { TYPE_CPE, 1 }, }, 91}; 92 93static const uint64_t aac_channel_layout[8] = { 94 AV_CH_LAYOUT_MONO, 95 AV_CH_LAYOUT_STEREO, 96 AV_CH_LAYOUT_SURROUND, 97 AV_CH_LAYOUT_4POINT0, 98 AV_CH_LAYOUT_5POINT0_BACK, 99 AV_CH_LAYOUT_5POINT1_BACK, 100 AV_CH_LAYOUT_7POINT1_WIDE, 101 0, 102}; 103 104#endif /* AVCODEC_AACDECTAB_H */ 105