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/* BSE - Better Sound Engine
* Copyright (C) 2001, 2002, 2006 Tim Janik
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* A copy of the GNU Lesser General Public License should ship along
* with this library; if not, see http://www.gnu.org/copyleft/.
*/
#include <bse/bsemain.h>
// #define TEST_VERBOSE
#include <sfi/sfitests.h>
#include <bse/bsemathsignal.h>
#include <bse/bsecxxplugin.hh> // for generated types
#define FLF "26.20"
static void
check_cent_tune_fast (void)
{
TSTART ("Cent Tune Function (fast Table based implementation)");
const double epsilon = 1e-15;
for (int i = -100; i <= +100; i++)
{
double setpoint = pow (2.0, 1. / 1200. * i);
TCHECK_CMP (fabs (bse_cent_tune_fast (i) - setpoint), <, epsilon);
if (i % 13 == 0)
TOK();
}
TDONE();
}
static void
check_cent_tune (void)
{
TSTART ("Cent Tune Function");
const double epsilon = 1e-14;
int i = 0;
for (double fine_tune = -3600; fine_tune < 3600; fine_tune += g_random_double()) /* 3 octaves */
{
double expected = pow (2.0, 1. / 1200. * fine_tune);
TCHECK_CMP (fabs (bse_cent_tune (fine_tune) - expected), <, epsilon);
if (i++ % 500 == 0)
TOK();
}
TDONE();
}
static void
check_equal_tempered_tuning (void)
{
TSTART ("Equal Temperament");
const double *table = bse_semitone_table_from_tuning (BSE_MUSICAL_TUNING_12_TET); /* returns [-132..+132] */
const double epsilon = 1e-11;
for (int i = -132; i <= +132; i++)
{
double setpoint = pow (2.0, 1. / 12. * i);
TCHECK_CMP (fabs (table[i] - setpoint), <, epsilon);
if (i % 13 == 0)
TOK();
}
TDONE();
}
static void
check_tuning_monotony (BseMusicalTuningType musical_tuning)
{
TSTART ("Monotony");
const double *table = bse_semitone_table_from_tuning (musical_tuning); /* returns [-132..+132] */
for (int i = -132; i <= +132; i++)
if (ABS (i) != 132)
{
TCHECK_CMP (table[i - 1], <, table[i]);
TCHECK_CMP (table[i + 1], >, table[i]);
if (i % 13 == 0)
TOK();
}
TDONE();
}
static void
check_freq_vs_notes (BseMusicalTuningType musical_tuning)
{
/* check freq/note mapping */
TSTART ("Frequency lookup");
for (int j = BSE_MIN_NOTE; j <= BSE_MAX_NOTE; j++)
{
for (int k = BSE_MIN_FINE_TUNE / 2; k <= BSE_MAX_FINE_TUNE / 2; k++)
{
double f, freq = bse_note_to_tuned_freq (musical_tuning, j, k);
int note, fine_tune;
int verbose = 0;
if (verbose)
g_print ("compose : note=%4d fine_tune=%4d freq=%"FLF"f\n", j, k, freq);
f = freq;
note = bse_note_from_freq (musical_tuning, freq);
TCHECK (note != BSE_NOTE_VOID);
fine_tune = bse_note_fine_tune_from_note_freq (musical_tuning, note, freq);
freq = bse_note_to_tuned_freq (musical_tuning, note, fine_tune);
double freq_error = freq - f;
double freq_ratio = MAX (freq, f) / MIN (freq, f);
if (verbose)
g_print ("decompose: note=%4d fine_tune=%4d freq=%"FLF"f (diff=%"FLF"f)\n", note, fine_tune, freq, freq - f);
if (ABS (k) < 11)
TCHECK (note == j);
if (musical_tuning == BSE_MUSICAL_TUNING_12_TET)
TCHECK_CMP (fabs (freq_error), <, 0.00000000001); /* equal temperament is fairly accurate */
else
TCHECK_CMP (freq_ratio, <, 1.00057778950655485930); /* detuning should be smaller than a cent */
}
if (j % 3 == 0)
TOK();
}
TDONE();
}
int
main (gint argc,
gchar *argv[])
{
bse_init_test (&argc, &argv, NULL);
check_cent_tune();
check_cent_tune_fast();
check_equal_tempered_tuning();
BseMusicalTuningType last_tuning = BSE_MUSICAL_TUNING_YOUNG;
/* check last tuning value by asserting defaulting behavior of succeding values */
TCHECK (bse_semitone_table_from_tuning (BseMusicalTuningType (last_tuning + 1)) == bse_semitone_table_from_tuning (BseMusicalTuningType (0)));
/* check monotonic musical tuning systems */
for (int j = BSE_MUSICAL_TUNING_12_TET; j <= last_tuning; j++)
{
BseMusicalTuningType musical_tuning = BseMusicalTuningType (j);
g_printerr ("Tuning System: %s\n", sfi_enum2choice (musical_tuning, BSE_TYPE_MUSICAL_TUNING_TYPE));
check_tuning_monotony (musical_tuning);
check_freq_vs_notes (musical_tuning);
}
return 0;
}
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