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closes #6

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closes #9
pitch detection runs on known schedule
fixed erratic pitch detection on launch
This commit is contained in:
michalcourson
2025-11-09 11:16:59 -05:00
parent e89620df27
commit 3c6616d1ec
6 changed files with 177 additions and 174 deletions
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189
Source/mayer_fft.cpp
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@ -52,6 +52,8 @@ http://crca.ucsd.edu/~msp/software.html */
* of work. -msp
*/
#include "mayer_fft.h"
#define REAL float
#define GOOD_TRIG
@ -62,8 +64,7 @@ http://crca.ucsd.edu/~msp/software.html */
#if defined(GOOD_TRIG)
#define FHT_SWAP(a,b,t) {(t)=(a);(a)=(b);(b)=(t);}
#define TRIG_VARS \
int t_lam=0;
#define TRIG_INIT(k,c,s) \
{ \
int i; \
@ -92,133 +93,21 @@ http://crca.ucsd.edu/~msp/software.html */
#define TRIG_RESET(k,c,s)
#endif
#if defined(FAST_TRIG)
#define TRIG_VARS \
REAL t_c,t_s;
#define TRIG_INIT(k,c,s) \
{ \
t_c = costab[k]; \
t_s = sintab[k]; \
c = 1; \
s = 0; \
}
#define TRIG_NEXT(k,c,s) \
{ \
REAL t = c; \
c = t*t_c - s*t_s; \
s = t*t_s + s*t_c; \
}
#define TRIG_RESET(k,c,s)
#endif
static REAL halsec[20] =
{
0,
0,
.54119610014619698439972320536638942006107206337801,
.50979557910415916894193980398784391368261849190893,
.50241928618815570551167011928012092247859337193963,
.50060299823519630134550410676638239611758632599591,
.50015063602065098821477101271097658495974913010340,
.50003765191554772296778139077905492847503165398345,
.50000941253588775676512870469186533538523133757983,
.50000235310628608051401267171204408939326297376426,
.50000058827484117879868526730916804925780637276181,
.50000014706860214875463798283871198206179118093251,
.50000003676714377807315864400643020315103490883972,
.50000000919178552207366560348853455333939112569380,
.50000000229794635411562887767906868558991922348920,
.50000000057448658687873302235147272458812263401372
};
static REAL costab[20] =
{
.00000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768847,
.92387953251128675612818318939678828682241662586364,
.98078528040323044912618223613423903697393373089333,
.99518472667219688624483695310947992157547486872985,
.99879545620517239271477160475910069444320361470461,
.99969881869620422011576564966617219685006108125772,
.99992470183914454092164649119638322435060646880221,
.99998117528260114265699043772856771617391725094433,
.99999529380957617151158012570011989955298763362218,
.99999882345170190992902571017152601904826792288976,
.99999970586288221916022821773876567711626389934930,
.99999992646571785114473148070738785694820115568892,
.99999998161642929380834691540290971450507605124278,
.99999999540410731289097193313960614895889430318945,
.99999999885102682756267330779455410840053741619428
};
static REAL sintab[20] =
{
1.0000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768846,
.38268343236508977172845998403039886676134456248561,
.19509032201612826784828486847702224092769161775195,
.09801714032956060199419556388864184586113667316749,
.04906767432741801425495497694268265831474536302574,
.02454122852291228803173452945928292506546611923944,
.01227153828571992607940826195100321214037231959176,
.00613588464915447535964023459037258091705788631738,
.00306795676296597627014536549091984251894461021344,
.00153398018628476561230369715026407907995486457522,
.00076699031874270452693856835794857664314091945205,
.00038349518757139558907246168118138126339502603495,
.00019174759731070330743990956198900093346887403385,
.00009587379909597734587051721097647635118706561284,
.00004793689960306688454900399049465887274686668768
};
static REAL coswrk[20] =
{
.00000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768847,
.92387953251128675612818318939678828682241662586364,
.98078528040323044912618223613423903697393373089333,
.99518472667219688624483695310947992157547486872985,
.99879545620517239271477160475910069444320361470461,
.99969881869620422011576564966617219685006108125772,
.99992470183914454092164649119638322435060646880221,
.99998117528260114265699043772856771617391725094433,
.99999529380957617151158012570011989955298763362218,
.99999882345170190992902571017152601904826792288976,
.99999970586288221916022821773876567711626389934930,
.99999992646571785114473148070738785694820115568892,
.99999998161642929380834691540290971450507605124278,
.99999999540410731289097193313960614895889430318945,
.99999999885102682756267330779455410840053741619428
};
static REAL sinwrk[20] =
{
1.0000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768846,
.38268343236508977172845998403039886676134456248561,
.19509032201612826784828486847702224092769161775195,
.09801714032956060199419556388864184586113667316749,
.04906767432741801425495497694268265831474536302574,
.02454122852291228803173452945928292506546611923944,
.01227153828571992607940826195100321214037231959176,
.00613588464915447535964023459037258091705788631738,
.00306795676296597627014536549091984251894461021344,
.00153398018628476561230369715026407907995486457522,
.00076699031874270452693856835794857664314091945205,
.00038349518757139558907246168118138126339502603495,
.00019174759731070330743990956198900093346887403385,
.00009587379909597734587051721097647635118706561284,
.00004793689960306688454900399049465887274686668768
};
#define SQRT2_2 0.70710678118654752440084436210484
#define SQRT2 2*0.70710678118654752440084436210484
void mayer_fht(REAL* fz, int n)
void MayerFFT::fht(REAL* fz, int n)
{
/* REAL a,b;
REAL c1,s1,s2,c2,s3,c3,s4,c4;
REAL f0,g0,f1,g1,f2,g2,f3,g3; */
int k, k1, k2, k3, k4, kx;
REAL* fi, * fn, * gi;
TRIG_VARS;
int t_lam = 0;
for (k1 = 1, k2 = 0; k1 < n; k1++)
{
@ -360,42 +249,42 @@ void mayer_fht(REAL* fz, int n)
} while (k4 < n);
}
void mayer_fft(int n, REAL* real, REAL* imag)
{
REAL a, b, c, d;
REAL q, r, s, t;
int i, j, k;
for (i = 1, j = n - 1, k = n / 2; i < k; i++, j--) {
a = real[i]; b = real[j]; q = a + b; r = a - b;
c = imag[i]; d = imag[j]; s = c + d; t = c - d;
real[i] = (q + t) * .5; real[j] = (q - t) * .5;
imag[i] = (s - r) * .5; imag[j] = (s + r) * .5;
}
mayer_fht(real, n);
mayer_fht(imag, n);
}
//void mayer_fft(int n, REAL* real, REAL* imag)
//{
// REAL a, b, c, d;
// REAL q, r, s, t;
// int i, j, k;
// for (i = 1, j = n - 1, k = n / 2; i < k; i++, j--) {
// a = real[i]; b = real[j]; q = a + b; r = a - b;
// c = imag[i]; d = imag[j]; s = c + d; t = c - d;
// real[i] = (q + t) * .5; real[j] = (q - t) * .5;
// imag[i] = (s - r) * .5; imag[j] = (s + r) * .5;
// }
// mayer_fht(real, n);
// mayer_fht(imag, n);
//}
//
//void mayer_ifft(int n, REAL* real, REAL* imag)
//{
// REAL a, b, c, d;
// REAL q, r, s, t;
// int i, j, k;
// mayer_fht(real, n);
// mayer_fht(imag, n);
// for (i = 1, j = n - 1, k = n / 2; i < k; i++, j--) {
// a = real[i]; b = real[j]; q = a + b; r = a - b;
// c = imag[i]; d = imag[j]; s = c + d; t = c - d;
// imag[i] = (s + r) * 0.5; imag[j] = (s - r) * 0.5;
// real[i] = (q - t) * 0.5; real[j] = (q + t) * 0.5;
// }
//}
void mayer_ifft(int n, REAL* real, REAL* imag)
{
REAL a, b, c, d;
REAL q, r, s, t;
int i, j, k;
mayer_fht(real, n);
mayer_fht(imag, n);
for (i = 1, j = n - 1, k = n / 2; i < k; i++, j--) {
a = real[i]; b = real[j]; q = a + b; r = a - b;
c = imag[i]; d = imag[j]; s = c + d; t = c - d;
imag[i] = (s + r) * 0.5; imag[j] = (s - r) * 0.5;
real[i] = (q - t) * 0.5; real[j] = (q + t) * 0.5;
}
}
void mayer_realfft(int n, REAL* real)
void MayerFFT::realfft(int n, REAL* real)
{
REAL a, b;
int i, j, k;
mayer_fht(real, n);
fht(real, n);
for (i = 1, j = n - 1, k = n / 2; i < k; i++, j--) {
a = real[i];
b = real[j];
@ -404,7 +293,7 @@ void mayer_realfft(int n, REAL* real)
}
}
void mayer_realifft(int n, REAL* real)
void MayerFFT::realifft(int n, REAL* real)
{
REAL a, b;
int i, j, k;
@ -415,5 +304,5 @@ void mayer_realifft(int n, REAL* real)
real[j] = (a - b);
real[i] = (a + b);
}
mayer_fht(real, n);
fht(real, n);
}