added accelerate vdsp FFT support and use it on iOS

This commit is contained in:
essej 2022-04-12 18:46:50 -04:00
parent 300c89d2b2
commit 52d3326de6
6 changed files with 364 additions and 61 deletions

View File

@ -179,7 +179,9 @@ inline REALTYPE profile(REALTYPE fi, REALTYPE bwi) {
inline void spectrum_copy(int nfreq, REALTYPE* freq1, REALTYPE* freq2)
{
for (int i = 0; i<nfreq; i++) freq2[i] = freq1[i];
//for (int i = 0; i<nfreq; i++) freq2[i] = freq1[i];
FloatVectorOperations::copy(freq2, freq1, nfreq);
};

View File

@ -16,10 +16,17 @@
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#if PS_USE_VDSP_FFT
#define VIMAGE_H // crazy hack needed
#include <Accelerate/Accelerate.h>
//#include <vForce.h>
#endif
#include "Stretch.h"
#include <stdlib.h>
#include <math.h>
FFT::FFT(int nsamples_, bool no_inverse)
{
nsamples=nsamples_;
@ -41,6 +48,19 @@ FFT::FFT(int nsamples_, bool no_inverse)
data.resize(nsamples,true);
bool allow_long_planning = false; // g_propsfile->getBoolValue("fftw_allow_long_planning", false);
//double t0 = Time::getMillisecondCounterHiRes();
#if PS_USE_VDSP_FFT
int maxlog2N = 1;
while ((1 << maxlog2N) < nsamples)
++maxlog2N;
log2N = maxlog2N;
planfft = vDSP_create_fftsetup(maxlog2N, kFFTRadix2);
m_workReal.resize(nsamples,false);
m_workImag.resize(nsamples,false);
//Logger::writeToLog("fftsize: " + String(nsamples) + " log2N: " + String(log2N));
#else
if (allow_long_planning)
{
//fftwf_plan_with_nthreads(2);
@ -55,6 +75,8 @@ FFT::FFT(int nsamples_, bool no_inverse)
if (no_inverse == false)
planifftw=fftwf_plan_r2r_1d(nsamples,data.data(),data.data(),FFTW_HC2R,FFTW_ESTIMATE);
}
#endif
//double t1 = Time::getMillisecondCounterHiRes();
//Logger::writeToLog("Creating FFTW3 plans took "+String(t1-t0)+ "ms");
static int seed = 0;
@ -64,46 +86,123 @@ FFT::FFT(int nsamples_, bool no_inverse)
FFT::~FFT()
{
fftwf_destroy_plan(planfftw);
#if PS_USE_VDSP_FFT
vDSP_destroy_fftsetup((FFTSetup)planfft);
#else
fftwf_destroy_plan(planfftw);
if (planifftw!=nullptr)
fftwf_destroy_plan(planifftw);
#endif
};
void FFT::smp2freq()
{
#if PS_USE_VDSP_FFT
for (int i=0;i<nsamples;i++)
const int halfsamples = nsamples / 2;
COMPLEX_SPLIT A;
A.realp = m_workReal.data();
A.imagp = m_workImag.data();
// apply window
//vDSP_vmul(gInFIFO, 1, mWindow, 1, gFFTworksp, 1, fftFrameSize);
//convert real input to even-odd
vDSP_ctoz((COMPLEX*)smp.data(), 2, &A, 1, halfsamples);
//memset(ioData->mBuffers[0].mData, 0, ioData->mBuffers[0].mDataByteSize);
// forward fft
vDSP_fft_zrip((FFTSetup)planfft, &A, 1, log2N, FFT_FORWARD);
// result is in split packed complex A.realp[0] is DC, A.imagp[0] is NY, so we zero NY before doing mag^2
A.imagp[0] = 0.0f;
//DebugLogC("post fft: %g %g\n", A.realp[fftFrameSize/4], A.imagp[fftFrameSize/4 + 1]);
// Absolute square (equivalent to mag^2)
vDSP_zvmags(&A, 1, freq.data(), 1, halfsamples);
// take square root
//vvsqrtf(freq.data(), freq.data(), &halfsamples);
for (int i=1; i < halfsamples;i++)
{
freq[i]=sqrt(freq[i]);
}
freq[0] = 0.0;
#else
for (int i=0;i<nsamples;i++)
data[i]=smp[i];
fftwf_execute(planfftw);
fftwf_execute(planfftw);
for (int i=1;i<nsamples/2;i++)
for (int i=1;i<nsamples/2;i++)
{
REALTYPE c=data[i];
REALTYPE s=data[nsamples-i];
REALTYPE c=data[i];
REALTYPE s=data[nsamples-i];
freq[i]=sqrt(c*c+s*s);
};
freq[0]=0.0;
freq[i]=sqrt(c*c+s*s);
};
freq[0]=0.0;
#endif
};
void FFT::freq2smp()
{
REALTYPE inv_2p15_2pi=1.0f/16384.0f*(float)c_PI;
for (int i=1;i<nsamples/2;i++)
const REALTYPE inv_2p15_2pi=1.0f/16384.0f*(float)c_PI;
#if PS_USE_VDSP_FFT
const int halfsamples = nsamples / 2;
COMPLEX_SPLIT A;
A.realp = m_workReal.data();
A.imagp = m_workImag.data();
for (int i=1;i<nsamples/2;i++)
{
unsigned int rand = m_randdist(m_randgen);
unsigned int rand = m_randdist(m_randgen);
REALTYPE phase = rand*inv_2p15_2pi;
m_workReal[i] = freq[i]*cos(phase);
m_workImag[i] = freq[i]*sin(phase);
};
m_workReal[0] = m_workImag[0] = 0.0;
// inverse fft
vDSP_fft_zrip((FFTSetup)planfft, &A, 1, log2N, FFT_INVERSE);
// unpack
vDSP_ztoc(&A, 1, (COMPLEX*)data.data(), 2, halfsamples);
// scale
//float scale = 1.f/data[0]; // 1.0f / nsamples ??
float scale = 1.f / nsamples; // 1.0f / nsamples ??
vDSP_vsmul(data.data(), 1, &scale, smp.data(), 1, nsamples);
#else
for (int i=1;i<nsamples/2;i++)
{
unsigned int rand = m_randdist(m_randgen);
REALTYPE phase=rand*inv_2p15_2pi;
data[i]=freq[i]*cos(phase);
data[nsamples-i]=freq[i]*sin(phase);
};
data[0]=data[nsamples/2+1]=data[nsamples/2]=0.0;
fftwf_execute(planifftw);
};
data[0]=data[nsamples/2+1]=data[nsamples/2]=0.0;
fftwf_execute(planifftw);
for (int i=0;i<nsamples;i++)
smp[i]=data[i]/nsamples;
#endif
};
void FFT::applywindow(FFTWindow type)
@ -129,7 +228,9 @@ void FFT::applywindow(FFTWindow type)
};
};
for (int i=0;i<nsamples;i++) smp[i]*=window.data[i];
//for (int i=0;i<nsamples;i++) smp[i]*=window.data[i];
FloatVectorOperations::multiply(smp.data(), window.data.data(), nsamples);
}
Stretch::Stretch(REALTYPE rap_,int /*bufsize_*/,FFTWindow w,bool bypass_,REALTYPE samplerate_,int /*stereo_mode_*/)
@ -160,22 +261,35 @@ void Stretch::set_rap(REALTYPE newrap){
void Stretch::do_analyse_inbuf(REALTYPE *smps){
//get the frequencies
for (int i=0;i<bufsize;i++) {
FloatVectorOperations::copy(infft->smp.data(), old_smps.data(), bufsize);
FloatVectorOperations::copy(infft->smp.data()+bufsize, smps, bufsize);
FloatVectorOperations::copy(old_freq.data(), infft->freq.data(), bufsize);
/*
for (int i=0;i<bufsize;i++) {
infft->smp[i]=old_smps[i];
infft->smp[i+bufsize]=smps[i];
old_freq[i]=infft->freq[i];
};
*/
infft->applywindow(window_type);
infft->smp2freq();
};
void Stretch::do_next_inbuf_smps(REALTYPE *smps){
for (int i=0;i<bufsize;i++) {
FloatVectorOperations::copy(very_old_smps.data(), old_smps.data(), bufsize);
FloatVectorOperations::copy(old_smps.data(), new_smps.data(), bufsize);
FloatVectorOperations::copy(new_smps.data(), smps, bufsize);
/*
for (int i=0;i<bufsize;i++) {
very_old_smps[i]=old_smps[i];
old_smps[i]=new_smps[i];
new_smps[i]=smps[i];
};
*/
};
REALTYPE Stretch::do_detect_onset(){
@ -249,7 +363,8 @@ REALTYPE Stretch::process(REALTYPE *smps,int nsmps)
jassert(bufsize > 0);
REALTYPE onset=0.0;
if (bypass){
for (int i=0;i<bufsize;i++) out_buf[i]=smps[i];
//for (int i=0;i<bufsize;i++) out_buf[i]=smps[i];
FloatVectorOperations::copy(out_buf.data(), smps, bufsize);
return 0.0;
};
@ -279,14 +394,24 @@ REALTYPE Stretch::process(REALTYPE *smps,int nsmps)
//construct the input fft
int start_pos=(int)(floor(remained_samples*bufsize));
if (start_pos>=bufsize) start_pos=bufsize-1;
FloatVectorOperations::copy(fft->smp.data(), very_old_smps.data() + start_pos, bufsize-start_pos);
FloatVectorOperations::copy(fft->smp.data() + (bufsize - start_pos), old_smps.data() , bufsize);
FloatVectorOperations::copy(fft->smp.data() + (2*bufsize - start_pos), new_smps.data() , start_pos);
/*
for (int i=0;i<bufsize-start_pos;i++) fft->smp[i]=very_old_smps[i+start_pos];
for (int i=0;i<bufsize;i++) fft->smp[i+bufsize-start_pos]=old_smps[i];
for (int i=0;i<start_pos;i++) fft->smp[i+2*bufsize-start_pos]=new_smps[i];
*/
//compute the output spectrum
fft->applywindow(window_type);
fft->smp2freq();
for (int i=0;i<bufsize;i++) outfft->freq[i]=fft->freq[i];
//for (int i=0;i<bufsize;i++) outfft->freq[i]=fft->freq[i];
FloatVectorOperations::copy(outfft->freq.data(), fft->freq.data(), bufsize);
//for (int i=0;i<bufsize;i++) outfft->freq[i]=infft->freq[i]*remained_samples+old_freq[i]*(1.0-remained_samples);
@ -310,7 +435,8 @@ REALTYPE Stretch::process(REALTYPE *smps,int nsmps)
};
//copy the current output buffer to old buffer
for (int i=0;i<bufsize*2;i++) old_out_smps[i]=outfft->smp[i];
//for (int i=0;i<bufsize*2;i++) old_out_smps[i]=outfft->smp[i];
FloatVectorOperations::copy(old_out_smps.data(), outfft->smp.data(), 2*bufsize);
};

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@ -22,13 +22,20 @@
#include "globals.h"
#include "fftw3.h"
#ifndef PS_USE_VDSP_FFT
#define PS_USE_VDSP_FFT 0
#endif
#if PS_USE_VDSP_FFT
#else
#include "fftw3.h"
#endif
#include "../JuceLibraryCode/JuceHeader.h"
#include <random>
#include <type_traits>
template<typename T>
class FFTWBuffer
{
@ -94,19 +101,34 @@ private:
int m_size = 0;
void mallocimpl(T*& buf,int size)
{
#if PS_USE_VDSP_FFT
// malloc aligns properly on vdsp platforms
if constexpr (std::is_same<T,float>::value)
buf = (float*)malloc(size*sizeof(float));
else
buf = (double*)malloc(size * sizeof(double));
#else
if constexpr (std::is_same<T,float>::value)
buf = (float*)fftwf_malloc(size*sizeof(float));
else
buf = (double*)fftw_malloc(size * sizeof(double));
#endif
}
void freeimpl(T*& buf)
{
if (buf!=nullptr)
{
#if PS_USE_VDSP_FFT
if constexpr (std::is_same<T, float>::value)
fftwf_free(buf);
free(buf);
else
fftw_free(buf);
free(buf);
#else
if constexpr (std::is_same<T, float>::value)
fftwf_free(buf);
else
fftw_free(buf);
#endif
buf = nullptr;
}
}
@ -132,7 +154,14 @@ class FFT
private:
fftwf_plan planfftw,planifftw;
#if PS_USE_VDSP_FFT
void * planfft;
int log2N;
FFTWBuffer<REALTYPE> m_workReal;
FFTWBuffer<REALTYPE> m_workImag;
#else
fftwf_plan planfftw,planifftw;
#endif
FFTWBuffer<REALTYPE> data;
struct{

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<XCODE_IPHONE targetFolder="Builds/iOS" iosDevelopmentTeamID="XCS435894D" microphonePermissionNeeded="1"
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<CONFIGURATIONS>
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