yading@10: /*
yading@10:  * Copyright (c) 2001-2003 The ffmpeg Project
yading@10:  *
yading@10:  * This file is part of FFmpeg.
yading@10:  *
yading@10:  * FFmpeg is free software; you can redistribute it and/or
yading@10:  * modify it under the terms of the GNU Lesser General Public
yading@10:  * License as published by the Free Software Foundation; either
yading@10:  * version 2.1 of the License, or (at your option) any later version.
yading@10:  *
yading@10:  * FFmpeg is distributed in the hope that it will be useful,
yading@10:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
yading@10:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
yading@10:  * Lesser General Public License for more details.
yading@10:  *
yading@10:  * You should have received a copy of the GNU Lesser General Public
yading@10:  * License along with FFmpeg; if not, write to the Free Software
yading@10:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
yading@10:  */
yading@10: 
yading@10: /**
yading@10:  * @file
yading@10:  * ADPCM tables
yading@10:  */
yading@10: 
yading@10: #include <stdint.h>
yading@10: 
yading@10: /* ff_adpcm_step_table[] and ff_adpcm_index_table[] are from the ADPCM
yading@10:    reference source */
yading@10: /* This is the index table: */
yading@10: const int8_t ff_adpcm_index_table[16] = {
yading@10:     -1, -1, -1, -1, 2, 4, 6, 8,
yading@10:     -1, -1, -1, -1, 2, 4, 6, 8,
yading@10: };
yading@10: 
yading@10: /**
yading@10:  * This is the step table. Note that many programs use slight deviations from
yading@10:  * this table, but such deviations are negligible:
yading@10:  */
yading@10: const int16_t ff_adpcm_step_table[89] = {
yading@10:         7,     8,     9,    10,    11,    12,    13,    14,    16,    17,
yading@10:        19,    21,    23,    25,    28,    31,    34,    37,    41,    45,
yading@10:        50,    55,    60,    66,    73,    80,    88,    97,   107,   118,
yading@10:       130,   143,   157,   173,   190,   209,   230,   253,   279,   307,
yading@10:       337,   371,   408,   449,   494,   544,   598,   658,   724,   796,
yading@10:       876,   963,  1060,  1166,  1282,  1411,  1552,  1707,  1878,  2066,
yading@10:      2272,  2499,  2749,  3024,  3327,  3660,  4026,  4428,  4871,  5358,
yading@10:      5894,  6484,  7132,  7845,  8630,  9493, 10442, 11487, 12635, 13899,
yading@10:     15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
yading@10: };
yading@10: 
yading@10: const int16_t ff_adpcm_oki_step_table[49] = {
yading@10:      16,  17,  19,  21,   23,   25,   28,   31,   34,  37,
yading@10:      41,  45,  50,  55,   60,   66,   73,   80,   88,  97,
yading@10:     107, 118, 130, 143,  157,  173,  190,  209,  230, 253,
yading@10:     279, 307, 337, 371,  408,  449,  494,  544,  598, 658,
yading@10:     724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
yading@10: };
yading@10: 
yading@10: /* These are for MS-ADPCM */
yading@10: /* ff_adpcm_AdaptationTable[], ff_adpcm_AdaptCoeff1[], and
yading@10:    ff_adpcm_AdaptCoeff2[] are from libsndfile */
yading@10: const int16_t ff_adpcm_AdaptationTable[] = {
yading@10:     230, 230, 230, 230, 307, 409, 512, 614,
yading@10:     768, 614, 512, 409, 307, 230, 230, 230
yading@10: };
yading@10: 
yading@10: /** Divided by 4 to fit in 8-bit integers */
yading@10: const uint8_t ff_adpcm_AdaptCoeff1[] = {
yading@10:     64, 128, 0, 48, 60, 115, 98
yading@10: };
yading@10: 
yading@10: /** Divided by 4 to fit in 8-bit integers */
yading@10: const int8_t ff_adpcm_AdaptCoeff2[] = {
yading@10:     0, -64, 0, 16, 0, -52, -58
yading@10: };
yading@10: 
yading@10: const int16_t ff_adpcm_yamaha_indexscale[] = {
yading@10:     230, 230, 230, 230, 307, 409, 512, 614,
yading@10:     230, 230, 230, 230, 307, 409, 512, 614
yading@10: };
yading@10: 
yading@10: const int8_t ff_adpcm_yamaha_difflookup[] = {
yading@10:      1,  3,  5,  7,  9,  11,  13,  15,
yading@10:     -1, -3, -5, -7, -9, -11, -13, -15
yading@10: };
yading@10: 
yading@10: const int16_t ff_adpcm_afc_coeffs[2][16] = {
yading@10:     { 0, 2048, 0, 1024, 4096, 3584, 3072, 4608, 4200, 4800, 5120, 2048, 1024, 64512, 64512, 63488 },
yading@10:     { 0, 0, 2048, 1024, 63488, 64000, 64512, 62976, 63288, 63236, 62464, 63488, 64512, 1024, 0, 0 }
yading@10: };