added accelerate vdsp FFT support and use it on iOS

Source/PS_Source/ProcessedStretch.h

@@ -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);
+
 };
 
 

Source/PS_Source/Stretch.cpp

@@ -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;
@@ -64,13 +86,55 @@ FFT::FFT(int nsamples_, bool no_inverse)
 
 FFT::~FFT()
 {
+#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
+
+    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];
@@ -86,11 +150,45 @@ void FFT::smp2freq()
         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;
+	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);
+        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);
@@ -100,10 +198,11 @@ void FFT::freq2smp()
 
     };
     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
+
+    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){
+    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;
 	};
 
@@ -279,13 +394,23 @@ 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);
 
 
 
@@ -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);
 
 	};
 

Source/PS_Source/Stretch.h

@@ -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)
+				free(buf);
+			else
+				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:
 
+#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{

Source/power.svg

@@ -0,0 +1,71 @@
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Source/power_sel.svg

@@ -0,0 +1,72 @@
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+   width="512px"
+   height="512px"
+   viewBox="0 0 512 512"
+   xml:space="preserve"
+   sodipodi:docname="power_sel.svg"
+   inkscape:version="1.0 (4035a4f, 2020-05-01)"
+   inkscape:export-filename="/Users/jesse/src/sonobus/images/person.png"
+   inkscape:export-xdpi="9"
+   inkscape:export-ydpi="9"><defs
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+     inkscape:guide-bbox="true"
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paulstretchplugin_ios.jucer

@@ -15,28 +15,6 @@
               jucerFormatVersion="1" useAppConfig="0" defines="JUCE_USE_CUSTOM_PLUGIN_STANDALONE_APP=1">
   <MAINGROUP id="nozXHl" name="PaulXStretch">
     <GROUP id="{03DA6B32-F666-FF60-F168-4385D0847058}" name="Source">
-      <FILE id="H0XjG1" name="CrossPlatformUtilsIOS.mm" compile="1" resource="0"
-            file="Source/CrossPlatformUtilsIOS.mm"/>
-      <FILE id="RsxiMD" name="CustomStandaloneFilterApp.cpp" compile="1"
-            resource="0" file="Source/CustomStandaloneFilterApp.cpp"/>
-      <FILE id="EUS9Ff" name="CustomStandaloneFilterWindow.h" compile="0"
-            resource="0" file="Source/CustomStandaloneFilterWindow.h"/>
-      <FILE id="rHA1fu" name="CustomLookAndFeel.cpp" compile="1" resource="0"
-            file="Source/CustomLookAndFeel.cpp"/>
-      <FILE id="Y4DgKq" name="CustomLookAndFeel.h" compile="0" resource="0"
-            file="Source/CustomLookAndFeel.h"/>
-      <FILE id="zvau5B" name="CrossPlatformUtils.h" compile="0" resource="0"
-            file="Source/CrossPlatformUtils.h"/>
-      <FILE id="fjYsFD" name="CrossPlatformUtilsMac.mm" compile="1" resource="0"
-            file="Source/CrossPlatformUtilsMac.mm"/>
-      <FILE id="RanaVV" name="RenderSettingsComponent.cpp" compile="1" resource="0"
-            file="Source/RenderSettingsComponent.cpp"/>
-      <FILE id="Mz5aVb" name="envelope_component.cpp" compile="1" resource="0"
-            file="Source/envelope_component.cpp"/>
-      <FILE id="apM6W6" name="envelope_component.h" compile="0" resource="0"
-            file="Source/envelope_component.h"/>
-      <FILE id="qfCc8R" name="jcdp_envelope.h" compile="0" resource="0" file="Source/jcdp_envelope.h"/>
-      <FILE id="TDOHpE" name="resample.cpp" compile="1" resource="0" file="Source/WDL/resample.cpp"/>
       <GROUP id="{3B6D1AF9-E53E-2F78-24A5-D12A34009E6A}" name="PS_Source">
         <FILE id="gDsFRp" name="globals.h" compile="0" resource="0" file="Source/PS_Source/globals.h"/>
         <FILE id="MOQjrp" name="ProcessedStretch.h" compile="0" resource="0"
@@ -51,26 +29,51 @@
         <FILE id="a7ur6I" name="StretchSource.cpp" compile="1" resource="0"
               file="Source/PS_Source/StretchSource.cpp"/>
       </GROUP>
-      <FILE id="KcXfhC" name="ps3_BufferingAudioSource.cpp" compile="1" resource="0"
+      <FILE id="zvau5B" name="CrossPlatformUtils.h" compile="0" resource="0"
-            file="Source/ps3_BufferingAudioSource.cpp"/>
+            file="Source/CrossPlatformUtils.h"/>
-      <FILE id="oWbh5E" name="ps3_BufferingAudioSource.h" compile="0" resource="0"
+      <FILE id="H0XjG1" name="CrossPlatformUtilsIOS.mm" compile="1" resource="0"
-            file="Source/ps3_BufferingAudioSource.h"/>
+            file="Source/CrossPlatformUtilsIOS.mm"/>
+      <FILE id="fjYsFD" name="CrossPlatformUtilsMac.mm" compile="1" resource="0"
+            file="Source/CrossPlatformUtilsMac.mm"/>
+      <FILE id="rHA1fu" name="CustomLookAndFeel.cpp" compile="1" resource="0"
+            file="Source/CustomLookAndFeel.cpp"/>
+      <FILE id="Y4DgKq" name="CustomLookAndFeel.h" compile="0" resource="0"
+            file="Source/CustomLookAndFeel.h"/>
+      <FILE id="RsxiMD" name="CustomStandaloneFilterApp.cpp" compile="1"
+            resource="0" file="Source/CustomStandaloneFilterApp.cpp"/>
+      <FILE id="EUS9Ff" name="CustomStandaloneFilterWindow.h" compile="0"
+            resource="0" file="Source/CustomStandaloneFilterWindow.h"/>
+      <FILE id="Mz5aVb" name="envelope_component.cpp" compile="1" resource="0"
+            file="Source/envelope_component.cpp"/>
+      <FILE id="apM6W6" name="envelope_component.h" compile="0" resource="0"
+            file="Source/envelope_component.h"/>
+      <FILE id="qfCc8R" name="jcdp_envelope.h" compile="0" resource="0" file="Source/jcdp_envelope.h"/>
+      <FILE id="lyNyYp" name="PluginEditor.cpp" compile="1" resource="0"
+            file="Source/PluginEditor.cpp"/>
+      <FILE id="IO7X2q" name="PluginEditor.h" compile="0" resource="0" file="Source/PluginEditor.h"/>
       <FILE id="jdPS0A" name="PluginProcessor.cpp" compile="1" resource="0"
             file="Source/PluginProcessor.cpp"/>
       <FILE id="pt5tX8" name="PluginProcessor.h" compile="0" resource="0"
             file="Source/PluginProcessor.h"/>
-      <FILE id="lyNyYp" name="PluginEditor.cpp" compile="1" resource="0"
+      <FILE id="HtOPrw" name="power.svg" compile="0" resource="1" file="Source/power.svg"/>
-            file="Source/PluginEditor.cpp"/>
+      <FILE id="TY7Im1" name="power_sel.svg" compile="0" resource="1" file="Source/power_sel.svg"/>
-      <FILE id="IO7X2q" name="PluginEditor.h" compile="0" resource="0" file="Source/PluginEditor.h"/>
+      <FILE id="KcXfhC" name="ps3_BufferingAudioSource.cpp" compile="1" resource="0"
+            file="Source/ps3_BufferingAudioSource.cpp"/>
+      <FILE id="oWbh5E" name="ps3_BufferingAudioSource.h" compile="0" resource="0"
+            file="Source/ps3_BufferingAudioSource.h"/>
+      <FILE id="RanaVV" name="RenderSettingsComponent.cpp" compile="1" resource="0"
+            file="Source/RenderSettingsComponent.cpp"/>
+      <FILE id="L4CoFz" name="RenderSettingsComponent.h" compile="0" resource="0"
+            file="Source/RenderSettingsComponent.h"/>
+      <FILE id="TDOHpE" name="resample.cpp" compile="1" resource="0" file="Source/WDL/resample.cpp"/>
     </GROUP>
   </MAINGROUP>
   <EXPORTFORMATS>
-    <XCODE_IPHONE targetFolder="Builds/iOS" externalLibraries="fftw3f" iosDevelopmentTeamID="XCS435894D"
+    <XCODE_IPHONE targetFolder="Builds/iOS" iosDevelopmentTeamID="XCS435894D" microphonePermissionNeeded="1"
-                  microphonePermissionNeeded="1" iosBackgroundAudio="1" buildNumber="100"
+                  iosBackgroundAudio="1" buildNumber="100" iosScreenOrientation="UIInterfaceOrientationLandscapeLeft,UIInterfaceOrientationLandscapeRight,UIInterfaceOrientationPortrait,UIInterfaceOrientationPortraitUpsideDown"
-                  iosScreenOrientation="UIInterfaceOrientationLandscapeLeft,UIInterfaceOrientationLandscapeRight,UIInterfaceOrientationPortrait,UIInterfaceOrientationPortraitUpsideDown"
                   iPadScreenOrientation="UIInterfaceOrientationLandscapeLeft,UIInterfaceOrientationLandscapeRight,UIInterfaceOrientationPortrait,UIInterfaceOrientationPortraitUpsideDown"
                   UIStatusBarHidden="0" UIRequiresFullScreen="0" customPList="&lt;plist version=&quot;1.0&quot;&gt;&#10;&lt;dict&gt;&#10;&#10;&#10;&lt;key&gt;ITSAppUsesNonExemptEncryption&lt;/key&gt;&#10;&#9;&lt;false/&gt;&#10;&#10;&lt;key&gt;UIStatusBarHidden&lt;/key&gt;&#10;&#9;&lt;false/&gt;&#10;&#9;&lt;key&gt;UIStatusBarStyle&lt;/key&gt;&#10;&#9;&lt;string&gt;UIStatusBarStyleLightContent&lt;/string&gt;&#10;&#10;&lt;key&gt;UIViewControllerBasedStatusBarAppearance&lt;/key&gt;&#10;&lt;false/&gt;&#10;&#10;&#10;&lt;key&gt;NSLocalNetworkUsageDescription&lt;/key&gt;&#10;&#9;&lt;string&gt;DrumJamPad uses networking to communicate with other local services&lt;/string&gt;&#10;&#10;&lt;key&gt;CFBundleDocumentTypes&lt;/key&gt;&#10;&#9;&lt;array&gt;&#10;&#9;&#9;&lt;dict&gt;&#10;&#9;&#9;&#9;&lt;key&gt;CFBundleTypeIconFiles&lt;/key&gt;&#10;&#9;&#9;&#9;&lt;array/&gt;&#10;&#9;&#9;&#9;&lt;key&gt;CFBundleTypeName&lt;/key&gt;&#10;&#9;&#9;&#9;&lt;string&gt;Audio File&lt;/string&gt;&#10;&#9;&#9;&#9;&lt;key&gt;CFBundleTypeRole&lt;/key&gt;&#10;&#9;&#9;&#9;&lt;string&gt;Viewer&lt;/string&gt;&#10;&#9;&#9;&#9;&lt;key&gt;LSHandlerRank&lt;/key&gt;&#10;&#9;&#9;&#9;&lt;string&gt;Owner&lt;/string&gt;&#10;&#9;&#9;&#9;&lt;key&gt;LSItemContentTypes&lt;/key&gt;&#10;&#9;&#9;&#9;&lt;array&gt;&#10;&#9;&#9;&#9;&#9;&lt;string&gt;com.microsoft.waveform-audio&lt;/string&gt;&#10;&#9;&#9;&#9;&#9;&lt;string&gt;public.aiff-audio&lt;/string&gt;&#10;&#9;&#9;&#9;&#9;&lt;string&gt;com.apple.coreaudio-format&lt;/string&gt;&#10;&#9;&#9;&#9;&#9;&lt;string&gt;public.mpeg-4-audio&lt;/string&gt;&#10;&#9;&#9;&#9;&#9;&lt;string&gt;public.mp3&lt;/string&gt;&#10;&#9;&#9;&#9;&lt;/array&gt;&#10;&#9;&#9;&lt;/dict&gt;&#10;&#9;&#9;&lt;/array&gt;&#10;&#10;&lt;/dict&gt;&#10;&lt;/plist&gt;"
-                  UIFileSharingEnabled="1" UISupportsDocumentBrowser="1">
+                  UIFileSharingEnabled="1" UISupportsDocumentBrowser="1" extraDefs="PS_USE_VDSP_FFT=1">
       <CONFIGURATIONS>
         <CONFIGURATION isDebug="1" name="Debug" headerPath="Source/PS_Source&#10;Source/WDL&#10;${HOME}/iosstatic/include"
                        libraryPath="${HOME}/iosstatic/lib&#10;"/>