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FFmpeg/libavcodec/als_data.h

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  1. /*

  2.  * ALS header file for common data

  3.  * Copyright (c) 2009 Thilo Borgmann <thilo.borgmann _at_ googlemail.com>

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. #ifndef AVCODEC_ALS_DATA_H

  23. #define AVCODEC_ALS_DATA_H

  24. 

  25. /**

  26.  * @file libavcodec/als_data.h

  27.  * MPEG-4 ALS common data tables

  28.  * @author Thilo Borgmann <thilo.borgmann _at_ googlemail.com>

  29.  */

  30. 

  31. 

  32. #include <stdint.h>

  33. 

  34. /** Rice parameters and corresponding index offsets for decoding the

  35.  *  indices of scaled PARCOR values. The table choosen is set globally

  36.  *  by the encoder and stored in ALSSpecificConfig.

  37.  */

  38. static const int8_t parcor_rice_table[3][20][2] = {

  39.     { {-52, 4}, {-29, 5}, {-31, 4}, { 19, 4}, {-16, 4},

  40.       { 12, 3}, { -7, 3}, {  9, 3}, { -5, 3}, {  6, 3},

  41.       { -4, 3}, {  3, 3}, { -3, 2}, {  3, 2}, { -2, 2},

  42.       {  3, 2}, { -1, 2}, {  2, 2}, { -1, 2}, {  2, 2} },

  43.     { {-58, 3}, {-42, 4}, {-46, 4}, { 37, 5}, {-36, 4},

  44.       { 29, 4}, {-29, 4}, { 25, 4}, {-23, 4}, { 20, 4},

  45.       {-17, 4}, { 16, 4}, {-12, 4}, { 12, 3}, {-10, 4},

  46.       {  7, 3}, { -4, 4}, {  3, 3}, { -1, 3}, {  1, 3} },

  47.     { {-59, 3}, {-45, 5}, {-50, 4}, { 38, 4}, {-39, 4},

  48.       { 32, 4}, {-30, 4}, { 25, 3}, {-23, 3}, { 20, 3},

  49.       {-20, 3}, { 16, 3}, {-13, 3}, { 10, 3}, { -7, 3},

  50.       {  3, 3}, {  0, 3}, { -1, 3}, {  2, 3}, { -1, 2} }

  51. };

  52. 

  53. 

  54. /** Scaled PARCOR values used for the first two PARCOR coefficients.

  55.  *  To be indexed by the Rice coded indices.

  56.  *  Generated by: parcor_scaled_values[i] = 32 + ((i * (i+1)) << 7) - (1 << 20)

  57.  *  Actual values are divided by 32 in order to be stored in 16 bits.

  58.  */

  59. static const int16_t parcor_scaled_values[] = {

  60.     -1048544 / 32, -1048288 / 32, -1047776 / 32, -1047008 / 32,

  61.     -1045984 / 32, -1044704 / 32, -1043168 / 32, -1041376 / 32,

  62.     -1039328 / 32, -1037024 / 32, -1034464 / 32, -1031648 / 32,

  63.     -1028576 / 32, -1025248 / 32, -1021664 / 32, -1017824 / 32,

  64.     -1013728 / 32, -1009376 / 32, -1004768 / 32,  -999904 / 32,

  65.      -994784 / 32,  -989408 / 32,  -983776 / 32,  -977888 / 32,

  66.      -971744 / 32,  -965344 / 32,  -958688 / 32,  -951776 / 32,

  67.      -944608 / 32,  -937184 / 32,  -929504 / 32,  -921568 / 32,

  68.      -913376 / 32,  -904928 / 32,  -896224 / 32,  -887264 / 32,

  69.      -878048 / 32,  -868576 / 32,  -858848 / 32,  -848864 / 32,

  70.      -838624 / 32,  -828128 / 32,  -817376 / 32,  -806368 / 32,

  71.      -795104 / 32,  -783584 / 32,  -771808 / 32,  -759776 / 32,

  72.      -747488 / 32,  -734944 / 32,  -722144 / 32,  -709088 / 32,

  73.      -695776 / 32,  -682208 / 32,  -668384 / 32,  -654304 / 32,

  74.      -639968 / 32,  -625376 / 32,  -610528 / 32,  -595424 / 32,

  75.      -580064 / 32,  -564448 / 32,  -548576 / 32,  -532448 / 32,

  76.      -516064 / 32,  -499424 / 32,  -482528 / 32,  -465376 / 32,

  77.      -447968 / 32,  -430304 / 32,  -412384 / 32,  -394208 / 32,

  78.      -375776 / 32,  -357088 / 32,  -338144 / 32,  -318944 / 32,

  79.      -299488 / 32,  -279776 / 32,  -259808 / 32,  -239584 / 32,

  80.      -219104 / 32,  -198368 / 32,  -177376 / 32,  -156128 / 32,

  81.      -134624 / 32,  -112864 / 32,   -90848 / 32,   -68576 / 32,

  82.       -46048 / 32,   -23264 / 32,     -224 / 32,    23072 / 32,

  83.        46624 / 32,    70432 / 32,    94496 / 32,   118816 / 32,

  84.       143392 / 32,   168224 / 32,   193312 / 32,   218656 / 32,

  85.       244256 / 32,   270112 / 32,   296224 / 32,   322592 / 32,

  86.       349216 / 32,   376096 / 32,   403232 / 32,   430624 / 32,

  87.       458272 / 32,   486176 / 32,   514336 / 32,   542752 / 32,

  88.       571424 / 32,   600352 / 32,   629536 / 32,   658976 / 32,

  89.       688672 / 32,   718624 / 32,   748832 / 32,   779296 / 32,

  90.       810016 / 32,   840992 / 32,   872224 / 32,   903712 / 32,

  91.       935456 / 32,   967456 / 32,   999712 / 32,  1032224 / 32

  92. };

  93. 

  94. 

  95. #endif /* AVCODEC_ALS_DATA_H */