/* * 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 libavcodec/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 /* @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, 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, 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, 39 }; static const uint8_t tns_max_bands_128[] = { 9, 9, 10, 14, 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 */