static void specCentroid_analyze(t_specCentroid *x, t_floatarg start, t_floatarg n)
{
int i, j, oldWindow, window, windowHalf, startSamp, endSamp, lengthSamp;
t_float dividend, divisor, centroid, *windowFuncPtr;
t_sample *signal_I;
t_garray *a;
if(!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
pd_error(x, "%s: no such array", x->x_arrayname->s_name);
else if(!garray_getfloatwords(a, &x->x_arrayPoints, &x->x_vec))
pd_error(x, "%s: bad template for specCentroid", x->x_arrayname->s_name);
else
{
startSamp = start;
startSamp = (startSamp<0)?0:startSamp;
if(n)
endSamp = startSamp + n-1;
else
endSamp = startSamp + x->window-1;
if(endSamp > x->x_arrayPoints)
endSamp = x->x_arrayPoints-1;
lengthSamp = endSamp-startSamp+1;
if(endSamp <= startSamp)
{
error("bad range of samples.");
return;
}
if(lengthSamp > x->powersOfTwo[x->powTwoArrSize-1])
{
post("WARNING: specCentroid: window truncated because requested size is larger than the current max_window setting. Use the max_window method to allow larger windows.");
lengthSamp = x->powersOfTwo[x->powTwoArrSize-1];
window = lengthSamp;
endSamp = startSamp + window - 1;
}
else
{
i=0;
while(lengthSamp > x->powersOfTwo[i])
i++;
window = x->powersOfTwo[i];
}
windowHalf = window * 0.5;
if(x->window != window)
{
oldWindow = x->window;
x->window = window;
x->signal_R = (t_sample *)t_resizebytes(x->signal_R, oldWindow*sizeof(t_sample), x->window*sizeof(t_sample));
}
if(x->windowFuncSize != lengthSamp)
{
x->blackman = (t_float *)t_resizebytes(x->blackman, x->windowFuncSize*sizeof(t_float), lengthSamp*sizeof(t_float));
x->cosine = (t_float *)t_resizebytes(x->cosine, x->windowFuncSize*sizeof(t_float), lengthSamp*sizeof(t_float));
x->hamming = (t_float *)t_resizebytes(x->hamming, x->windowFuncSize*sizeof(t_float), lengthSamp*sizeof(t_float));
x->hann = (t_float *)t_resizebytes(x->hann, x->windowFuncSize*sizeof(t_float), lengthSamp*sizeof(t_float));
x->windowFuncSize = lengthSamp;
tIDLib_blackmanWindow(x->blackman, x->windowFuncSize);
tIDLib_cosineWindow(x->cosine, x->windowFuncSize);
tIDLib_hammingWindow(x->hamming, x->windowFuncSize);
tIDLib_hannWindow(x->hann, x->windowFuncSize);
}
// create local memory
signal_I = (t_sample *)t_getbytes((windowHalf+1)*sizeof(t_sample));
// construct analysis window
for(i=0, j=startSamp; j<=endSamp; i++, j++)
x->signal_R[i] = x->x_vec[j].w_float;
// set window function
windowFuncPtr = x->hann; //default case to get rid of compile warning
switch(x->windowFunction)
{
case 0:
break;
case 1:
windowFuncPtr = x->blackman;
break;
case 2:
windowFuncPtr = x->cosine;
break;
case 3:
windowFuncPtr = x->hamming;
break;
case 4:
windowFuncPtr = x->hann;
break;
default:
break;
};
// if windowFunction == 0, skip the windowing (rectangular)
if(x->windowFunction>0)
for(i=0; i<lengthSamp; i++, windowFuncPtr++)
x->signal_R[i] *= *windowFuncPtr;
// then zero pad the end
for(; i<window; i++)
x->signal_R[i] = 0.0;
mayer_realfft(window, x->signal_R);
tIDLib_realfftUnpack(window, windowHalf, x->signal_R, signal_I);
tIDLib_power(windowHalf+1, x->signal_R, signal_I);
// power spectrum sometimes generates lower scores than magnitude. make it optional.
if(!x->powerSpectrum)
tIDLib_mag(windowHalf+1, x->signal_R);
dividend=0;
divisor=0;
centroid=0;
for(i=0; i<=windowHalf; i++)
dividend += x->signal_R[i]*(i*(x->sr/window)); // weight by bin freq
for(i=0; i<=windowHalf; i++)
divisor += x->signal_R[i];
if(divisor==0) divisor = 1; // don't divide by zero
centroid = dividend/divisor;
outlet_float(x->x_centroid, centroid);
// free local memory
t_freebytes(signal_I, (windowHalf+1)*sizeof(t_sample));
}
}
static void specFlatness_tilde_bang(t_specFlatness *x)
{
int i, j, window, windowHalf, bangSample;
t_sample *signal_R, *signal_I;
t_float dividend, divisor, windowHalfPlusOneRecip, flatness, *windowFuncPtr;
double currentTime,timef =0.0;
window = x->window;
windowHalf = window*0.5;
windowHalfPlusOneRecip = 1.0/(t_float)(windowHalf+1);
// create local memory
signal_R = (t_sample *)t_getbytes(window*sizeof(t_sample));
signal_I = (t_sample *)t_getbytes((windowHalf+1)*sizeof(t_sample));
//currentTime = clock_gettimesince(x->lastDspTime);
clock_getftime(&timef);
currentTime = timef - x->lastDspTime;
bangSample = (int)(((currentTime/1000.0)*x->sr)+0.5); // round
if (bangSample < 0)
bangSample = 0;
else if ( bangSample >= x->n )
bangSample = x->n - 1;
// construct analysis window using bangSample as the end of the window
for(i=0, j=bangSample; i<window; i++, j++)
signal_R[i] = x->signal_R[j];
// set window function
windowFuncPtr = x->hann; //default case to get rid of compile warning
switch(x->windowFunction)
{
case 0:
break;
case 1:
windowFuncPtr = x->blackman;
break;
case 2:
windowFuncPtr = x->cosine;
break;
case 3:
windowFuncPtr = x->hamming;
break;
case 4:
windowFuncPtr = x->hann;
break;
default:
break;
};
// if windowFunction == 0, skip the windowing (rectangular)
if(x->windowFunction>0)
for(i=0; i<window; i++, windowFuncPtr++)
signal_R[i] *= *windowFuncPtr;
mayer_realfft(window, signal_R);
tIDLib_realfftUnpack(window, windowHalf, signal_R, signal_I);
tIDLib_power(windowHalf+1, signal_R, signal_I);
if(!x->powerSpectrum)
tIDLib_mag(windowHalf+1, signal_R);
dividend=1; // to get the product of all terms for geometric mean
divisor=0;
flatness=0;
// geometric mean
// take the nth roots first so as not to lose data.
for(i=0; i<=windowHalf; i++)
x->nthRoots[i] = pow(signal_R[i], windowHalfPlusOneRecip);
// take the product of nth roots
// what to do with values that are zero? for now, ignoring them.
for(i=0; i<=windowHalf; i++)
if(x->nthRoots[i] != 0)
dividend *= x->nthRoots[i];
for(i=0; i<=windowHalf; i++)
divisor += signal_R[i];
divisor *= windowHalfPlusOneRecip; // arithmetic mean
if(divisor==0)
divisor = 1;
flatness = dividend/divisor;
outlet_float(x->x_flatness, flatness);
// free local memory
t_freebytes(signal_R, window*sizeof(t_sample));
t_freebytes(signal_I, (windowHalf+1)*sizeof(t_sample));
}
static void specRolloff_tilde_bang(t_specRolloff_tilde *x)
{
int i, j, window, windowHalf, bangSample;
t_sample *signal_R, *signal_I;
t_float energy, energyTarget, rolloff, *windowFuncPtr;
double currentTime;
window = x->window;
windowHalf = window*0.5;
// create local memory
signal_R = (t_sample *)t_getbytes(window*sizeof(t_sample));
signal_I = (t_sample *)t_getbytes((windowHalf+1)*sizeof(t_sample));
currentTime = clock_gettimesince(x->lastDspTime);
bangSample = (int)(((currentTime/1000.0)*x->sr)+0.5); // round
if (bangSample < 0)
bangSample = 0;
else if ( bangSample >= x->n )
bangSample = x->n - 1;
// construct analysis window using bangSample as the end of the window
for(i=0, j=bangSample; i<window; i++, j++)
signal_R[i] = x->signal_R[j];
// set window function
windowFuncPtr = x->hann; //default case to get rid of compile warning
switch(x->windowFunction)
{
case 0:
break;
case 1:
windowFuncPtr = x->blackman;
break;
case 2:
windowFuncPtr = x->cosine;
break;
case 3:
windowFuncPtr = x->hamming;
break;
case 4:
windowFuncPtr = x->hann;
break;
default:
break;
};
// if windowFunction == 0, skip the windowing (rectangular)
if(x->windowFunction>0)
for(i=0; i<window; i++, windowFuncPtr++)
signal_R[i] *= *windowFuncPtr;
mayer_realfft(window, signal_R);
tIDLib_realfftUnpack(window, windowHalf, signal_R, signal_I);
tIDLib_power(windowHalf+1, signal_R, signal_I);
if(!x->powerSpectrum)
tIDLib_mag(windowHalf+1, signal_R);
energyTarget=0;
for(i=0; i<=windowHalf; i++)
energyTarget += signal_R[i];
energyTarget *= x->concentration;
energy=0;
i=0;
while(energy <= energyTarget)
{
energy += signal_R[i];
i++;
if(i>windowHalf)
break;
}
i = (i==0)?1:i;
rolloff = x->binFreqs[i-1]; // back up one because the last one went over...
outlet_float(x->x_rolloff, rolloff);
// free local memory
t_freebytes(signal_R, window*sizeof(t_sample));
t_freebytes(signal_I, (windowHalf+1)*sizeof(t_sample));
}
static void barkSpec_tilde_bang(t_barkSpec *x)
{
int i, j, window, windowHalf, bangSample;
t_atom *listOut;
t_sample *signal_R, *signal_I;
t_float *windowFuncPtr;
double currentTime, timef = 0.0;
window = x->window;
windowHalf = window*0.5;
// create local memory
listOut = (t_atom *)t_getbytes_(x->numFilters*sizeof(t_atom));
signal_R = (t_sample *)t_getbytes_(window*sizeof(t_sample));
signal_I = (t_sample *)t_getbytes_((windowHalf+1)*sizeof(t_sample));
//currentTime = clock_gettimesince(x->lastDspTime);
clock_getftime(&timef);
currentTime = timef - x->lastDspTime;
bangSample = (int)(((currentTime/1000.0)*x->sr)+0.5); // round
if (bangSample < 0)
bangSample = 0;
else if ( bangSample >= x->n )
bangSample = x->n - 1;
// construct analysis window using bangSample as the end of the window
for(i=0, j=bangSample; i<window; i++, j++)
signal_R[i] = x->signal_R[j];
// set window function
windowFuncPtr = x->hann; //default case to get rid of compile warning
switch(x->windowFunction)
{
case 0:
break;
case 1:
windowFuncPtr = x->blackman;
break;
case 2:
windowFuncPtr = x->cosine;
break;
case 3:
windowFuncPtr = x->hamming;
break;
case 4:
windowFuncPtr = x->hann;
break;
default:
break;
};
// if windowFunction == 0, skip the windowing (rectangular)
if(x->windowFunction>0)
for(i=0; i<window; i++, windowFuncPtr++)
signal_R[i] *= *windowFuncPtr;
mayer_realfft(window, signal_R);
tIDLib_realfftUnpack(window, windowHalf, signal_R, signal_I);
tIDLib_power(windowHalf+1, signal_R, signal_I);
// power spectrum sometimes generates lower scores than magnitude. make it optional.
if(!x->powerSpectrum)
tIDLib_mag(windowHalf+1, signal_R);
tIDLib_filterbankMultiply(signal_R, x->normalize, x->filterAvg, x->x_filterbank, x->numFilters);
for(i=0; i<x->numFilters; i++)
SETFLOAT(listOut+i, signal_R[i]);
outlet_list(x->x_featureList, 0, x->numFilters, listOut);
// free local memory
t_freebytes_(listOut, x->numFilters*sizeof(t_atom));
t_freebytes_(signal_R, window*sizeof(t_sample));
t_freebytes_(signal_I, (windowHalf+1)*sizeof(t_sample));
}
static void specSkewness_tilde_bang(t_specSkewness_tilde *x)
{
int i, j, window, windowHalf, bangSample;
t_sample *signal_R, *signal_I;
t_float dividend, centroid, std, divisor, skewness, *windowFuncPtr;
double currentTime;
window = x->window;
windowHalf = window*0.5;
// create local memory
signal_R = (t_sample *)t_getbytes(window*sizeof(t_sample));
signal_I = (t_sample *)t_getbytes((windowHalf+1)*sizeof(t_sample));
currentTime = clock_gettimesince(x->lastDspTime);
bangSample = (int)(((currentTime/1000.0)*x->sr)+0.5); // round
if (bangSample < 0)
bangSample = 0;
else if ( bangSample >= x->n )
bangSample = x->n - 1;
// construct analysis window using bangSample as the end of the window
for(i=0, j=bangSample; i<window; i++, j++)
signal_R[i] = x->signal_R[j];
// set window function
windowFuncPtr = x->hann; //default case to get rid of compile warning
switch(x->windowFunction)
{
case 0:
break;
case 1:
windowFuncPtr = x->blackman;
break;
case 2:
windowFuncPtr = x->cosine;
break;
case 3:
windowFuncPtr = x->hamming;
break;
case 4:
windowFuncPtr = x->hann;
break;
default:
break;
};
// if windowFunction == 0, skip the windowing (rectangular)
if(x->windowFunction>0)
for(i=0; i<window; i++, windowFuncPtr++)
signal_R[i] *= *windowFuncPtr;
mayer_realfft(window, signal_R);
tIDLib_realfftUnpack(window, windowHalf, signal_R, signal_I);
tIDLib_power(windowHalf+1, signal_R, signal_I);
if(!x->powerSpectrum)
tIDLib_mag(windowHalf+1, signal_R);
dividend=0;
divisor=0;
centroid=0;
for(i=0; i<=windowHalf; i++)
{
dividend += signal_R[i] * x->binFreqs[i]; // weight by bin freq
divisor += signal_R[i];
}
divisor = (divisor==0)?1.0:divisor; // don't divide by zero
centroid = dividend/divisor;
dividend=0;
std=0;
for(i=0; i<=windowHalf; i++)
dividend += pow((x->binFreqs[i] - centroid), 2) * signal_R[i];
std = sqrt(dividend/divisor);
std = pow(std, 3);
std = (std==0)?1.0:std; // don't divide by zero
dividend=0;
skewness=0;
for(i=0; i<=windowHalf; i++)
dividend += pow((x->binFreqs[i] - centroid), 3) * signal_R[i];
skewness = (dividend/divisor)/std;
outlet_float(x->x_skewness, skewness);
// free local memory
t_freebytes(signal_R, window*sizeof(t_sample));
t_freebytes(signal_I, (windowHalf+1)*sizeof(t_sample));
}
static void magSpec_tilde_bang(t_magSpec_tilde *x)
{
int i, j, window, windowHalf, bangSample;
t_atom *listOut;
t_sample *signal_R, *signal_I;
t_float *windowFuncPtr;
double currentTime;
window = x->window;
windowHalf = window*0.5;
// create local memory
listOut = (t_atom *)t_getbytes((windowHalf+1)*sizeof(t_atom));
signal_R = (t_sample *)t_getbytes(window*sizeof(t_sample));
signal_I = (t_sample *)t_getbytes((windowHalf+1)*sizeof(t_sample));
currentTime = clock_gettimesince(x->lastDspTime);
bangSample = (int)(((currentTime/1000.0)*x->sr)+0.5); // round
if (bangSample < 0)
bangSample = 0;
else if ( bangSample >= x->n )
bangSample = x->n - 1;
// construct analysis window using bangSample as the end of the window
for(i=0, j=bangSample; i<window; i++, j++)
signal_R[i] = x->signal_R[j];
// set window function
windowFuncPtr = x->hann; //default case to get rid of compile warning
switch(x->windowFunction)
{
case 0:
break;
case 1:
windowFuncPtr = x->blackman;
break;
case 2:
windowFuncPtr = x->cosine;
break;
case 3:
windowFuncPtr = x->hamming;
break;
case 4:
windowFuncPtr = x->hann;
break;
default:
break;
};
// if windowFunction == 0, skip the windowing (rectangular)
if(x->windowFunction>0)
for(i=0; i<window; i++, windowFuncPtr++)
signal_R[i] *= *windowFuncPtr;
mayer_realfft(window, signal_R);
tIDLib_realfftUnpack(window, windowHalf, signal_R, signal_I);
tIDLib_power(windowHalf+1, signal_R, signal_I);
if(!x->powerSpectrum)
tIDLib_mag(windowHalf+1, signal_R);
if(x->normalize)
tIDLib_normal(windowHalf+1, signal_R);
for(i=0; i<=windowHalf; i++)
SETFLOAT(listOut+i, signal_R[i]);
outlet_list(x->x_mag, 0, windowHalf+1, listOut);
// free local memory
t_freebytes(listOut, (windowHalf+1)*sizeof(t_atom));
t_freebytes(signal_R, window*sizeof(t_sample));
t_freebytes(signal_I, (windowHalf+1)*sizeof(t_sample));
}