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/libavcodec/adpcm_data.c

http://github.com/FFmpeg/FFmpeg
C | 192 lines | 140 code | 18 blank | 34 comment | 0 complexity | 5f1eac70d88b6d53d203e54f20da1221 MD5 | raw file
  1/*
  2 * Copyright (c) 2001-2003 The FFmpeg project
  3 *
  4 * This file is part of FFmpeg.
  5 *
  6 * FFmpeg is free software; you can redistribute it and/or
  7 * modify it under the terms of the GNU Lesser General Public
  8 * License as published by the Free Software Foundation; either
  9 * version 2.1 of the License, or (at your option) any later version.
 10 *
 11 * FFmpeg is distributed in the hope that it will be useful,
 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 14 * Lesser General Public License for more details.
 15 *
 16 * You should have received a copy of the GNU Lesser General Public
 17 * License along with FFmpeg; if not, write to the Free Software
 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 19 */
 20
 21/**
 22 * @file
 23 * ADPCM tables
 24 */
 25
 26#include <stdint.h>
 27
 28/* ff_adpcm_step_table[] and ff_adpcm_index_table[] are from the ADPCM
 29   reference source */
 30static const int8_t adpcm_index_table2[4] = {
 31    -1,  2,
 32    -1,  2,
 33};
 34
 35static const int8_t adpcm_index_table3[8] = {
 36    -1, -1,  1,  2,
 37    -1, -1,  1,  2,
 38};
 39
 40const int8_t ff_adpcm_index_table[16] = {
 41    -1, -1, -1, -1, 2, 4, 6, 8,
 42    -1, -1, -1, -1, 2, 4, 6, 8,
 43};
 44
 45static const int8_t adpcm_index_table5[32] = {
 46    -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16,
 47    -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16,
 48};
 49
 50const int8_t * const ff_adpcm_index_tables[4] = {
 51    &adpcm_index_table2[0],
 52    &adpcm_index_table3[0],
 53    &ff_adpcm_index_table[0],
 54    &adpcm_index_table5[0],
 55};
 56
 57/**
 58 * This is the step table. Note that many programs use slight deviations from
 59 * this table, but such deviations are negligible:
 60 */
 61const int16_t ff_adpcm_step_table[89] = {
 62        7,     8,     9,    10,    11,    12,    13,    14,    16,    17,
 63       19,    21,    23,    25,    28,    31,    34,    37,    41,    45,
 64       50,    55,    60,    66,    73,    80,    88,    97,   107,   118,
 65      130,   143,   157,   173,   190,   209,   230,   253,   279,   307,
 66      337,   371,   408,   449,   494,   544,   598,   658,   724,   796,
 67      876,   963,  1060,  1166,  1282,  1411,  1552,  1707,  1878,  2066,
 68     2272,  2499,  2749,  3024,  3327,  3660,  4026,  4428,  4871,  5358,
 69     5894,  6484,  7132,  7845,  8630,  9493, 10442, 11487, 12635, 13899,
 70    15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
 71};
 72
 73const int16_t ff_adpcm_oki_step_table[49] = {
 74     16,  17,  19,  21,   23,   25,   28,   31,   34,  37,
 75     41,  45,  50,  55,   60,   66,   73,   80,   88,  97,
 76    107, 118, 130, 143,  157,  173,  190,  209,  230, 253,
 77    279, 307, 337, 371,  408,  449,  494,  544,  598, 658,
 78    724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
 79};
 80
 81/* These are for MS-ADPCM */
 82/* ff_adpcm_AdaptationTable[], ff_adpcm_AdaptCoeff1[], and
 83   ff_adpcm_AdaptCoeff2[] are from libsndfile */
 84const int16_t ff_adpcm_AdaptationTable[] = {
 85    230, 230, 230, 230, 307, 409, 512, 614,
 86    768, 614, 512, 409, 307, 230, 230, 230
 87};
 88
 89/** Divided by 4 to fit in 8-bit integers */
 90const uint8_t ff_adpcm_AdaptCoeff1[] = {
 91    64, 128, 0, 48, 60, 115, 98
 92};
 93
 94/** Divided by 4 to fit in 8-bit integers */
 95const int8_t ff_adpcm_AdaptCoeff2[] = {
 96    0, -64, 0, 16, 0, -52, -58
 97};
 98
 99const int16_t ff_adpcm_yamaha_indexscale[] = {
100    230, 230, 230, 230, 307, 409, 512, 614,
101    230, 230, 230, 230, 307, 409, 512, 614
102};
103
104const int8_t ff_adpcm_yamaha_difflookup[] = {
105     1,  3,  5,  7,  9,  11,  13,  15,
106    -1, -3, -5, -7, -9, -11, -13, -15
107};
108
109const uint16_t ff_adpcm_afc_coeffs[2][16] = {
110    { 0, 2048, 0, 1024, 4096, 3584, 3072, 4608, 4200, 4800, 5120, 2048, 1024, 64512, 64512, 63488 },
111    { 0, 0, 2048, 1024, 63488, 64000, 64512, 62976, 63288, 63236, 62464, 63488, 64512, 1024, 0, 0 }
112};
113
114const int16_t ff_adpcm_mtaf_stepsize[32][16] = {
115    {     1,     5,     9,    13,    16,    20,    24,    28,
116         -1,    -5,    -9,   -13,   -16,   -20,   -24,   -28, },
117    {     2,     6,    11,    15,    20,    24,    29,    33,
118         -2,    -6,   -11,   -15,   -20,   -24,   -29,   -33, },
119    {     2,     7,    13,    18,    23,    28,    34,    39,
120         -2,    -7,   -13,   -18,   -23,   -28,   -34,   -39, },
121    {     3,     9,    15,    21,    28,    34,    40,    46,
122         -3,    -9,   -15,   -21,   -28,   -34,   -40,   -46, },
123    {     3,    11,    18,    26,    33,    41,    48,    56,
124         -3,   -11,   -18,   -26,   -33,   -41,   -48,   -56, },
125    {     4,    13,    22,    31,    40,    49,    58,    67,
126         -4,   -13,   -22,   -31,   -40,   -49,   -58,   -67, },
127    {     5,    16,    26,    37,    48,    59,    69,    80,
128         -5,   -16,   -26,   -37,   -48,   -59,   -69,   -80, },
129    {     6,    19,    31,    44,    57,    70,    82,    95,
130         -6,   -19,   -31,   -44,   -57,   -70,   -82,   -95, },
131    {     7,    22,    38,    53,    68,    83,    99,   114,
132         -7,   -22,   -38,   -53,   -68,   -83,   -99,  -114, },
133    {     9,    27,    45,    63,    81,    99,   117,   135,
134         -9,   -27,   -45,   -63,   -81,   -99,  -117,  -135, },
135    {    10,    32,    53,    75,    96,   118,   139,   161,
136        -10,   -32,   -53,   -75,   -96,  -118,  -139,  -161, },
137    {    12,    38,    64,    90,   115,   141,   167,   193,
138        -12,   -38,   -64,   -90,  -115,  -141,  -167,  -193, },
139    {    15,    45,    76,   106,   137,   167,   198,   228,
140        -15,   -45,   -76,  -106,  -137,  -167,  -198,  -228, },
141    {    18,    54,    91,   127,   164,   200,   237,   273,
142        -18,   -54,   -91,  -127,  -164,  -200,  -237,  -273, },
143    {    21,    65,   108,   152,   195,   239,   282,   326,
144        -21,   -65,  -108,  -152,  -195,  -239,  -282,  -326, },
145    {    25,    77,   129,   181,   232,   284,   336,   388,
146        -25,   -77,  -129,  -181,  -232,  -284,  -336,  -388, },
147    {    30,    92,   153,   215,   276,   338,   399,   461,
148        -30,   -92,  -153,  -215,  -276,  -338,  -399,  -461, },
149    {    36,   109,   183,   256,   329,   402,   476,   549,
150        -36,  -109,  -183,  -256,  -329,  -402,  -476,  -549, },
151    {    43,   130,   218,   305,   392,   479,   567,   654,
152        -43,  -130,  -218,  -305,  -392,  -479,  -567,  -654, },
153    {    52,   156,   260,   364,   468,   572,   676,   780,
154        -52,  -156,  -260,  -364,  -468,  -572,  -676,  -780, },
155    {    62,   186,   310,   434,   558,   682,   806,   930,
156        -62,  -186,  -310,  -434,  -558,  -682,  -806,  -930, },
157    {    73,   221,   368,   516,   663,   811,   958,  1106,
158        -73,  -221,  -368,  -516,  -663,  -811,  -958, -1106, },
159    {    87,   263,   439,   615,   790,   966,  1142,  1318,
160        -87,  -263,  -439,  -615,  -790,  -966, -1142, -1318, },
161    {   104,   314,   523,   733,   942,  1152,  1361,  1571,
162       -104,  -314,  -523,  -733,  -942, -1152, -1361, -1571, },
163    {   124,   374,   623,   873,  1122,  1372,  1621,  1871,
164       -124,  -374,  -623,  -873, -1122, -1372, -1621, -1871, },
165    {   148,   445,   743,  1040,  1337,  1634,  1932,  2229,
166       -148,  -445,  -743, -1040, -1337, -1634, -1932, -2229, },
167    {   177,   531,   885,  1239,  1593,  1947,  2301,  2655,
168       -177,  -531,  -885, -1239, -1593, -1947, -2301, -2655, },
169    {   210,   632,  1053,  1475,  1896,  2318,  2739,  3161,
170       -210,  -632, -1053, -1475, -1896, -2318, -2739, -3161, },
171    {   251,   753,  1255,  1757,  2260,  2762,  3264,  3766,
172       -251,  -753, -1255, -1757, -2260, -2762, -3264, -3766, },
173    {   299,   897,  1495,  2093,  2692,  3290,  3888,  4486,
174       -299,  -897, -1495, -2093, -2692, -3290, -3888, -4486, },
175    {   356,  1068,  1781,  2493,  3206,  3918,  4631,  5343,
176       -356, -1068, -1781, -2493, -3206, -3918, -4631, -5343, },
177    {   424,  1273,  2121,  2970,  3819,  4668,  5516,  6365,
178       -424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, },
179};
180
181const int8_t ff_adpcm_ima_cunning_index_table[8] = {
182    -1, -1, -1, -1, 1, 2, 3, 4,
183};
184
185const int16_t ff_adpcm_ima_cunning_step_table[61] = {
186       1,    1,   1,      1,     2,     2,     3,     3,    4,      5,
187       6,    7,   8,     10,    12,    14,    16,    20,    24,    28,
188      32,   40,  48,     56,    64,    80,    96,   112,   128,   160,
189     192,  224,  256,   320,   384,   448,   512,   640,   768,   896,
190    1024, 1280, 1536,  1792,  2048,  2560,  3072,  3584,  4096,  5120,
191    6144, 7168, 8192, 10240, 12288, 14336, 16384, 20480, 24576, 28672, 0
192};