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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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6
Source/Helmholtz.cpp
View File

@ -45,11 +45,13 @@ void Helmholtz::iosamples(const t_float* in, t_float* out, int size)
int mask = framesize - 1;
int outindex = 0;
// call analysis function when it is time
if (!(timeindex & (framesize / overlap - 1))) analyzeframe();
while (size--)
{
// call analysis function when it is time
if (!(timeindex & (framesize / overlap - 1))) analyzeframe();
inputbuf[timeindex++] = *in++;
//out[outindex++] = processbuf[timeindex++];
timeindex &= mask;

5
Source/Helmholtz.h
View File

@ -50,8 +50,8 @@ against another DSP framework, you need to define t_float, and you need to
include Ron Mayer's fft or similar functionality. */
#include "mayer_fft.h"
#define REALFFT mayer_realfft
#define REALIFFT mayer_realifft
#define REALFFT fft.realfft
#define REALIFFT fft.realifft
/***********************************************************************/
@ -104,6 +104,7 @@ private:
t_float fidelity;
t_float biasfactor;
t_float minrms;
MayerFFT fft;
};
#endif // #ifndef Helmholtz_H

35
Source/Shifter.cpp
View File

@ -28,10 +28,10 @@ void Shifter::Init(float samplerate, int samplesPerBlock)
{
sample_rate_ = samplerate;
blocksize = samplesPerBlock;
out_midi_smoother.SetFrameTime((float)samplesPerBlock / samplerate);
out_midi_smoother.SetFrameTime((float)256 / samplerate);
volume = 1;
helm.setframesize(1024);
helm.setoverlap(1);
helm.setoverlap(2);
for (int i = 0; i < MAX_VOICES; ++i)
{
voices[i].Init(samplerate);
@ -46,18 +46,21 @@ void Shifter::Init(float samplerate, int samplesPerBlock)
for (int i = 0; i < 8192; ++i) {
cos_lookup[i] = cos(2 * PI_F * i / 8192.0);
}
in_period = 0;
}
void Shifter::Process(const float* const* in,
float** out,
size_t size)
{
DetectPitch(in, out, size);
SetRates();
// for (size_t i = 0; i < size; ++i) {
// out[0][i] = 0;
// }
GetSamples(out, in[0], size);
for (size_t i = 0; i < size; i += 256) {
size_t offset = i;
size_t lefover_size = std::min((size_t)256, size - i);
DetectPitch(in, out, lefover_size, offset);
SetRates();
GetSamples(out, in[0], lefover_size, offset);
}
//for (size_t i = 0; i < size; ++i)
//{
// // out[0][i] = osc.Process();
@ -78,7 +81,7 @@ float findMedian(float a, float b, float c) {
}
void Shifter::DetectPitch(const float* const* in, float** out, size_t size)
void Shifter::DetectPitch(const float* const* in, float** out, size_t size, size_t offset)
{
// detect current pitch
// pitch_detect.update(in[0], size);
@ -97,16 +100,16 @@ void Shifter::DetectPitch(const float* const* in, float** out, size_t size)
// current_pitch = findMedian(last_freqs[0], last_freqs[1], last_freqs[2]);
// in_period = 1.0 / current_pitch * 48000;
helm.iosamples(in[0], out[0], size);
helm.iosamples(in[0]+offset, out[0]+offset, size);
float period = helm.getperiod();
float fidel = helm.getfidelity();
//DBG("frequency: " << 48000 / period << " fidel: " << fidel);
// Adjustable filter amount (0.0f = no filtering, 1.0f = max filtering)
static float in_period_filter_amount = 0.5f; // You can expose this as a parameter
const float in_period_filter_amount = 0.5f; // You can expose this as a parameter
if (fidel > 0.95) {
// Smoothly filter in_period changes
// Smoothly filter in_`period changes
in_period = in_period * in_period_filter_amount + period * (1.0f - in_period_filter_amount);
}
float in_freq = sample_rate_ / in_period;
@ -201,7 +204,7 @@ void Shifter::AddInterpolatedFrame(int voice, int max_index, float resampling_pe
}
}
void Shifter::GetSamples(float** output, const float* input, size_t size)
void Shifter::GetSamples(float** output, const float* input, size_t size, size_t offset)
{
if (freeze_needs_copy) {
freeze_needs_copy = false;
@ -273,13 +276,13 @@ void Shifter::GetSamples(float** output, const float* input, size_t size)
//add input samples
in_buffer[in_playhead] = input[i];
in_buffer[in_playhead] = input[i+offset];
//output samples, set to 0
for (int ch = 0; ch < 2; ++ch) {
output[ch][i] = out_buffer[ch][out_playhead];
output[ch][i+offset] = out_buffer[ch][out_playhead];
if (!enable_autotune) {
output[ch][i] += input[i] * melody_mix;
output[ch][i+offset] += input[i+offset] * melody_mix;
}
out_buffer[ch][out_playhead] = 0;
}

5
Source/Shifter.h
View File

@ -84,6 +84,7 @@ public:
PcorrPrev = 60.0f;
PtargPrev = 60;
depth = 1.0f;
inputPrev = 0;
}
void SetFrameTime(float frame_time) {
dt = frame_time;
@ -167,9 +168,9 @@ public:
ShifterVoice freeze_voices[MAX_VOICES];
private:
void DetectPitch(const float* const* in, float** out, size_t size);
void DetectPitch(const float* const* in, float** out, size_t size, size_t offset);
void SetRates();
void GetSamples(float** output, const float* input, size_t size);
void GetSamples(float** output, const float* input, size_t size, size_t offset);
float GetOutputEnvelopePeriod(int out_voice);
float GetOutputEnvelopePeriodFreeze(int freeze_voice);
int GetPeakIndex();

189
Source/mayer_fft.cpp
View File

@ -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);
}

111
Source/mayer_fft.h
View File

@ -3,7 +3,114 @@
#define REAL float
void mayer_realfft(int n, REAL* real);
void mayer_realifft(int n, REAL* real);
//void mayer_realfft(int n, REAL* real);
//void mayer_realifft(int n, REAL* real);
class MayerFFT {
public:
void realfft(int n, REAL* real);
void realifft(int n, REAL* real);
MayerFFT() :halsec{
0,
0,
.54119610014619698439972320536638942006107206337801,
.50979557910415916894193980398784391368261849190893,
.50241928618815570551167011928012092247859337193963,
.50060299823519630134550410676638239611758632599591,
.50015063602065098821477101271097658495974913010340,
.50003765191554772296778139077905492847503165398345,
.50000941253588775676512870469186533538523133757983,
.50000235310628608051401267171204408939326297376426,
.50000058827484117879868526730916804925780637276181,
.50000014706860214875463798283871198206179118093251,
.50000003676714377807315864400643020315103490883972,
.50000000919178552207366560348853455333939112569380,
.50000000229794635411562887767906868558991922348920,
.50000000057448658687873302235147272458812263401372
},
costab{
.00000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768847,
.92387953251128675612818318939678828682241662586364,
.98078528040323044912618223613423903697393373089333,
.99518472667219688624483695310947992157547486872985,
.99879545620517239271477160475910069444320361470461,
.99969881869620422011576564966617219685006108125772,
.99992470183914454092164649119638322435060646880221,
.99998117528260114265699043772856771617391725094433,
.99999529380957617151158012570011989955298763362218,
.99999882345170190992902571017152601904826792288976,
.99999970586288221916022821773876567711626389934930,
.99999992646571785114473148070738785694820115568892,
.99999998161642929380834691540290971450507605124278,
.99999999540410731289097193313960614895889430318945,
.99999999885102682756267330779455410840053741619428
},
sintab{
1.0000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768846,
.38268343236508977172845998403039886676134456248561,
.19509032201612826784828486847702224092769161775195,
.09801714032956060199419556388864184586113667316749,
.04906767432741801425495497694268265831474536302574,
.02454122852291228803173452945928292506546611923944,
.01227153828571992607940826195100321214037231959176,
.00613588464915447535964023459037258091705788631738,
.00306795676296597627014536549091984251894461021344,
.00153398018628476561230369715026407907995486457522,
.00076699031874270452693856835794857664314091945205,
.00038349518757139558907246168118138126339502603495,
.00019174759731070330743990956198900093346887403385,
.00009587379909597734587051721097647635118706561284,
.00004793689960306688454900399049465887274686668768
},
coswrk{
.00000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768847,
.92387953251128675612818318939678828682241662586364,
.98078528040323044912618223613423903697393373089333,
.99518472667219688624483695310947992157547486872985,
.99879545620517239271477160475910069444320361470461,
.99969881869620422011576564966617219685006108125772,
.99992470183914454092164649119638322435060646880221,
.99998117528260114265699043772856771617391725094433,
.99999529380957617151158012570011989955298763362218,
.99999882345170190992902571017152601904826792288976,
.99999970586288221916022821773876567711626389934930,
.99999992646571785114473148070738785694820115568892,
.99999998161642929380834691540290971450507605124278,
.99999999540410731289097193313960614895889430318945,
.99999999885102682756267330779455410840053741619428
},
sinwrk{
1.0000000000000000000000000000000000000000000000000,
.70710678118654752440084436210484903928483593768846,
.38268343236508977172845998403039886676134456248561,
.19509032201612826784828486847702224092769161775195,
.09801714032956060199419556388864184586113667316749,
.04906767432741801425495497694268265831474536302574,
.02454122852291228803173452945928292506546611923944,
.01227153828571992607940826195100321214037231959176,
.00613588464915447535964023459037258091705788631738,
.00306795676296597627014536549091984251894461021344,
.00153398018628476561230369715026407907995486457522,
.00076699031874270452693856835794857664314091945205,
.00038349518757139558907246168118138126339502603495,
.00019174759731070330743990956198900093346887403385,
.00009587379909597734587051721097647635118706561284,
.00004793689960306688454900399049465887274686668768
}
{
}
private:
void fht(REAL* fz, int n);
REAL halsec[20];
REAL costab[20];
REAL sintab[20];
REAL coswrk[20];
REAL sinwrk[20];
};
#endif