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/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2014 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include "notes.h"
#define NOTE_FREQUENCY_FACTOR 1000
static const int32_t noteFrequencies[] = {
/* 0 -5C */ 8176,
/* 1 -5C# */ 8662,
/* 2 -5D */ 9177,
/* 3 -5D# */ 9723,
/* 4 -5E */ 10301,
/* 5 -5F */ 10913,
/* 6 -5F# */ 11562,
/* 7 -5G */ 12250,
/* 8 -5G# */ 12978,
/* 9 -5A */ 13750,
/* 10 -5A# */ 14568,
/* 11 -5B */ 15434,
/* 12 -4C */ 16352,
/* 13 -4C# */ 17324,
/* 14 -4D */ 18354,
/* 15 -4D# */ 19445,
/* 16 -4E */ 20602,
/* 17 -4F */ 21827,
/* 18 -4F# */ 23125,
/* 19 -4G */ 24500,
/* 20 -4G# */ 25957,
/* 21 -4A */ 27500,
/* 22 -4A# */ 29135,
/* 23 -4B */ 30868,
/* 24 -3C */ 32703,
/* 25 -3C# */ 34648,
/* 26 -3D */ 36708,
/* 27 -3D# */ 38891,
/* 28 -3E */ 41203,
/* 29 -3F */ 43654,
/* 30 -3F# */ 46249,
/* 31 -3G */ 48999,
/* 32 -3G# */ 51913,
/* 33 -3A */ 55000,
/* 34 -3A# */ 58270,
/* 35 -3B */ 61735,
/* 36 -2C */ 65406,
/* 37 -2C# */ 69296,
/* 38 -2D */ 73416,
/* 39 -2D# */ 77782,
/* 40 -2E */ 82407,
/* 41 -2F */ 87307,
/* 42 -2F# */ 92499,
/* 43 -2G */ 97999,
/* 44 -2G# */ 103826,
/* 45 -2A */ 110000,
/* 46 -2A# */ 116541,
/* 47 -2B */ 123471,
/* 48 -1C */ 130813,
/* 49 -1C# */ 138591,
/* 50 -1D */ 146832,
/* 51 -1D# */ 155563,
/* 52 -1E */ 164814,
/* 53 -1F */ 174614,
/* 54 -1F# */ 184997,
/* 55 -1G */ 195998,
/* 56 -1G# */ 207652,
/* 57 -1A */ 220000,
/* 58 -1A# */ 233082,
/* 59 -1B */ 246942,
/* 60 0C */ 261626,
/* 61 0C# */ 277183,
/* 62 0D */ 293665,
/* 63 0D# */ 311127,
/* 64 0E */ 329628,
/* 65 0F */ 349228,
/* 66 0F# */ 369994,
/* 67 0G */ 391995,
/* 68 0G# */ 415305,
/* 69 0A */ 440000,
/* 70 0A# */ 466164,
/* 71 0B */ 493883,
/* 72 +1C */ 523251,
/* 73 +1C# */ 554365,
/* 74 +1D */ 587330,
/* 75 +1D# */ 622254,
/* 76 +1E */ 659255,
/* 77 +1F */ 698456,
/* 78 +1F# */ 739989,
/* 79 +1G */ 783991,
/* 80 +1G# */ 830609,
/* 81 +1A */ 880000,
/* 82 +1A# */ 932328,
/* 83 +1B */ 987767,
/* 84 +2C */ 1046502,
/* 85 +2C# */ 1108731,
/* 86 +2D */ 1174659,
/* 87 +2D# */ 1244508,
/* 88 +2E */ 1318510,
/* 89 +2F */ 1396913,
/* 90 +2F# */ 1479978,
/* 91 +2G */ 1567982,
/* 92 +2G# */ 1661219,
/* 93 +2A */ 1760000,
/* 94 +2A# */ 1864655,
/* 95 +2B */ 1975533,
/* 96 +3C */ 2093005,
/* 97 +3C# */ 2217461,
/* 98 +3D */ 2349318,
/* 99 +3D# */ 2489016,
/* 100 +3E */ 2637020,
/* 101 +3F */ 2793826,
/* 102 +3F# */ 2959955,
/* 103 +3G */ 3135963,
/* 104 +3G# */ 3322438,
/* 105 +3A */ 3520000,
/* 106 +3A# */ 3729310,
/* 107 +3B */ 3951066,
/* 108 +4C */ 4186009,
/* 109 +4C# */ 4434922,
/* 110 +4D */ 4698636,
/* 111 +4D# */ 4978032,
/* 112 +4E */ 5274041,
/* 113 +4F */ 5587652,
/* 114 +4F# */ 5919911,
/* 115 +4G */ 6271927,
/* 116 +4G# */ 6644875,
/* 117 +4A */ 7040000,
/* 118 +4A# */ 7458620,
/* 119 +4B */ 7902133,
/* 120 +5C */ 8372018,
/* 121 +5C# */ 8869844,
/* 122 +5D */ 9397273,
/* 123 +5D# */ 9956063,
/* 124 +5E */ 10548082,
/* 125 +5F */ 11175303,
/* 126 +5F# */ 11839822,
/* 127 +5G */ 12543854
};
static inline int32_t
getNoteFrequency (unsigned char note) {
size_t count = ARRAY_COUNT(noteFrequencies);
if (note >= count) note = count - 1;
return noteFrequencies[note];
}
int32_t
getIntegerNoteFrequency (unsigned char note) {
return getNoteFrequency(note) / NOTE_FREQUENCY_FACTOR;
}
#ifndef NO_FLOAT
float
getRealNoteFrequency (unsigned char note) {
return (float)getNoteFrequency(note) / (float)NOTE_FREQUENCY_FACTOR;
}
#endif /* NO_FLOAT */
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