apps/codecs/libcook/cookdata_fixpoint.h

   1 /*
   2  * COOK compatible decoder fixed point data types and constants
   3  * Copyright (c) 2007 Ian Braithwaite
   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
  23 /**
  24  * @file cookdata_fixpoint.h
  25  * Cook AKA RealAudio G2 compatible decoder
  26  * fixed point data types and constants
  27  */
  28
  29 #include <inttypes.h>
  30 typedef int32_t FIXP;           /* Fixed point variable type */
  31 typedef uint16_t FIXPU;         /* Fixed point fraction 0<=x<1 */
  32
  33 typedef FIXP REAL_T;
  34
  35
  36 /* No additional variables in COOKContext
  37  * for fixed point routines
  38  */
  39 typedef struct {
  40 } realvars_t;
  41
  42 static const FIXPU pow128_tab[128] = {
  43     /* x_i = 2^(15+i/128) */
  44     0x8000, 0x80b2, 0x8165, 0x8219, 0x82ce, 0x8383, 0x843a, 0x84f2, 0x85ab,
  45     0x8665, 0x871f, 0x87db, 0x8898, 0x8956, 0x8a15, 0x8ad5, 0x8b96, 0x8c58,
  46     0x8d1b, 0x8ddf, 0x8ea4, 0x8f6b, 0x9032, 0x90fa, 0x91c4, 0x928e, 0x935a,
  47     0x9427, 0x94f5, 0x95c4, 0x9694, 0x9765, 0x9838, 0x990c, 0x99e0, 0x9ab6,
  48     0x9b8d, 0x9c65, 0x9d3f, 0x9e19, 0x9ef5, 0x9fd2, 0xa0b0, 0xa190, 0xa270,
  49     0xa352, 0xa435, 0xa519, 0xa5ff, 0xa6e6, 0xa7ce, 0xa8b7, 0xa9a1, 0xaa8d,
  50     0xab7a, 0xac69, 0xad58, 0xae49, 0xaf3b, 0xb02f, 0xb124, 0xb21a, 0xb312,
  51     0xb40b, 0xb505, 0xb601, 0xb6fe, 0xb7fc, 0xb8fc, 0xb9fd, 0xbaff, 0xbc03,
  52     0xbd09, 0xbe0f, 0xbf18, 0xc021, 0xc12c, 0xc239, 0xc347, 0xc456, 0xc567,
  53     0xc67a, 0xc78d, 0xc8a3, 0xc9ba, 0xcad2, 0xcbec, 0xcd08, 0xce25, 0xcf43,
  54     0xd063, 0xd185, 0xd2a8, 0xd3cd, 0xd4f3, 0xd61b, 0xd745, 0xd870, 0xd99d,
  55     0xdacc, 0xdbfc, 0xdd2e, 0xde61, 0xdf96, 0xe0cd, 0xe205, 0xe340, 0xe47b,
  56     0xe5b9, 0xe6f8, 0xe839, 0xe97c, 0xeac1, 0xec07, 0xed4f, 0xee99, 0xefe5,
  57     0xf132, 0xf281, 0xf3d3, 0xf525, 0xf67a, 0xf7d1, 0xf929, 0xfa84, 0xfbe0,
  58     0xfd3e, 0xfe9e
  59 };
  60
  61
  62
  63 /* dither_table and quant_centroid_table.
  64  * Index 1: [0] - scaled by 2^13, [1] - scaled by 2^13 / sqrt(2)
  65  * Index 2: [0..7] - category
  66  * Index 3: [0] - dither_table, [1..13] - quant_centroid_table
  67  */
  68 static const FIXP quant_tables[2][8][14] = {{{
  69     0x00000000, 0x0645a1cb, 0x0c2d0e56, 0x11eb851f, 0x17a1cac1, 0x1d4fdf3b,
  70     0x22ed9168, 0x28a7ef9e, 0x2e49ba5e, 0x33eb851f, 0x39916873, 0x3f126e98,
  71     0x449ba5e3, 0x4b958106
  72 },{
  73     0x00000000, 0x08b43958, 0x10f5c28f, 0x19020c4a, 0x2116872b, 0x2922d0e5,
  74     0x3126e979, 0x38fdf3b6, 0x411eb852, 0x49eb851f, 0x00000000, 0x00000000,
  75     0x00000000, 0x00000000
  76 },{
  77     0x00000000, 0x0bef9db2, 0x176c8b44, 0x22e147ae, 0x2e1cac08, 0x39581062,
  78     0x450e5604, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  79     0x00000000, 0x00000000
  80 },{
  81     0x00000000, 0x10189375, 0x20000000, 0x2fe353f8, 0x3fc28f5c, 0x00000000,
  82     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  83     0x00000000, 0x00000000
  84 },{
  85     0x00000000, 0x1522d0e5, 0x2b3f7cee, 0x3fba5e35, 0x00000000, 0x00000000,
  86     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  87     0x00000000, 0x00000000
  88 },{
  89     0x02d413cd, 0x1a83126f, 0x37db22d1, 0x00000000, 0x00000000, 0x00000000,
  90     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  91     0x00000000, 0x00000000
  92 },{
  93     0x04000000, 0x1f6c8b44, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  94     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  95     0x00000000, 0x00000000
  96 },{
  97     0x0b504f33, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  98     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
  99     0x00000000, 0x00000000
 100 }},{{
 101     0x00000000, 0x046f5a70, 0x089c1768, 0x0cabddd3, 0x10b5d955, 0x14ba09ed,
 102     0x18b2a4b4, 0x1cbf85aa, 0x20bb05e5, 0x24b68620, 0x28b4ebcf, 0x2c994066,
 103     0x30835fe6, 0x35722a5e
 104 },{
 105     0x00000000, 0x062797a1, 0x0bfe1683, 0x11aeee7a, 0x1765915b, 0x1d166952,
 106     0x22c17660, 0x284ca76c, 0x2e0bfaaa, 0x3444f306, 0x00000000, 0x00000000,
 107     0x00000000, 0x00000000
 108 },{
 109     0x00000000, 0x0870a594, 0x1090326a, 0x18a9f456, 0x209b29e3, 0x288c5f70,
 110     0x30d478a5, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 111     0x00000000, 0x00000000
 112 },{
 113     0x00000000, 0x0b61afee, 0x16a09e66, 0x21dca76a, 0x2d15caf9, 0x00000000,
 114     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 115     0x00000000, 0x00000000
 116 },{
 117     0x00000000, 0x0ef20652, 0x1e94b968, 0x2d100010, 0x00000000, 0x00000000,
 118     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 119     0x00000000, 0x00000000
 120 },{
 121     0x02000000, 0x12bf2f44, 0x277f041b, 0x00000000, 0x00000000, 0x00000000,
 122     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 123     0x00000000, 0x00000000
 124 },{
 125     0x02d413cd, 0x16385a03, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 126     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 127     0x00000000, 0x00000000
 128 },{
 129     0x08000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 130     0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000,
 131     0x00000000, 0x00000000
 132 }}};
 133
 134 static const FIXPU cplscale2[3] = {
 135     /* 2^16 C_ij */
 136     0xf3f9, 0xb505, 0x4d8b
 137 };
 138 static const FIXPU cplscale3[7] = {
 139     /* 2^16 C_ij */
 140     0xfb35, 0xefdf, 0xe03d, 0xb505, 0x7b81, 0x596e, 0x314d
 141 };
 142 static const FIXPU cplscale4[15] = {
 143     /* 2^16 C_ij */
 144     0xfdd2, 0xf927, 0xf3f9, 0xee1d, 0xe749, 0xdee9, 0xd381, 0xb505, 0x903b,
 145     0x7de2, 0x6dbe, 0x5e02, 0x4d8b, 0x3ad1, 0x2155
 146 };
 147 static const FIXPU cplscale5[31] = {
 148     /* 2^16 C_ij */
 149     0xfef5, 0xfcce, 0xfa8e, 0xf832, 0xf5b5, 0xf314, 0xf049, 0xed4c, 0xea12,
 150     0xe68e, 0xe2ab, 0xde4b, 0xd938, 0xd30b, 0xcab6, 0xb505, 0x9c59, 0x90e8,
 151     0x8778, 0x7ef9, 0x76fc, 0x6f45, 0x67ab, 0x600e, 0x5850, 0x504d, 0x47db,
 152     0x3ebd, 0x3486, 0x2853, 0x1715
 153 };
 154 static const FIXPU cplscale6[63] = {
 155     /* 2^16 C_ij */
 156     0xff7d, 0xfe74, 0xfd65, 0xfc50, 0xfb35, 0xfa14, 0xf8eb, 0xf7bb, 0xf683,
 157     0xf543, 0xf3f9, 0xf2a6, 0xf148, 0xefdf, 0xee6a, 0xece6, 0xeb54, 0xe9b2,
 158     0xe7fd, 0xe634, 0xe453, 0xe258, 0xe03d, 0xddff, 0xdb94, 0xd8f4, 0xd610,
 159     0xd2d2, 0xcf13, 0xca8c, 0xc47c, 0xb505, 0xa41a, 0x9c90, 0x9685, 0x913a,
 160     0x8c67, 0x87e5, 0x839c, 0x7f7e, 0x7b81, 0x779b, 0x73c7, 0x6fff, 0x6c3f,
 161     0x6883, 0x64c7, 0x6107, 0x5d40, 0x596e, 0x558d, 0x5198, 0x4d8b, 0x495f,
 162     0x450d, 0x408b, 0x3bcd, 0x36c1, 0x314d, 0x2b4a, 0x246e, 0x1c1a, 0x1029
 163 };
 164