fftw

I followed the script on Compiling fftw-3.3.4. But I am getting all the libraries of architecture x86_64. Thats why I cannot lipo them. ( libfftw3f_armv7.a, libfftw3f_x86_64.a, libfftw3f_arm64.a, libfftw3f_i386.a) So any idea how to update this script to get the correct architecture? P.s., by config. : ./configure --host=arm-apple-darwin --target=arm-apple-darwin --enable-float --enable-neon I am getting the error : configure: error: Need a version of gcc with -mfpu=neon So I just delete --enable-neon and it works. Is it a mistake? Thanks a lot. I wanted to delete my Question. But then I saw

Ceeloss-MacBook-Pro:desktop ceelos$ gcc -o prog -I/usr/local/include test.c Undefined symbols for architecture x86_64: "_fftw_destroy_plan", referenced from: _main in test-IBqBdS.o "_fftw_execute", referenced from: _main in test-IBqBdS.o "_fftw_plan_dft_1d", referenced from: _main in test-IBqBdS.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) Ceeloss-MacBook-Pro:desktop ceelos$ What's this telling me? It's telling you that you forgot to use -L and -l to tell gcc where the FFTW libraries are and what they're

I build Android project where I use Android NDK with LibXTract to extract audio features. LibXTract use fftw3 library. Project is consisted of button which runs simple example form libxtract: JNIEXPORT void JNICALL Java_com_androidnative1_NativeClass_showText(JNIEnv *env, jclass clazz) { float mean = 0, vector[] = {.1, .2, .3, .4, -.5, -.4, -.3, -.2, -.1}, spectrum[10]; int n, N = 9; float argf[4]; argf[0] = 8000.f; argf[1] = XTRACT_MAGNITUDE_SPECTRUM; argf[2] = 0.f; argf[3] = 0.f; xtract[XTRACT_MEAN]((void *)&vector, N, 0, (void *)&mean); __android_log_print(ANDROID_LOG_DEBUG, "AndNat", "com

A similar version of this question has been asked before ( how to compile fftw3 on iOS ) about previous versions of IOS and/or OSX, but I am unable to get fftw3 working on a actual IOS device. (Though it works fine in the simulator using the MacPorts "universal" distribution). If anyone has had any success using fftw3 please let me know how you were able to get it working! I am using OSX 10.7 and am trying specifically to run fftw on an iPad3 with IOS 5.1 installed. Thanks. 来源： https://stackoverflow.com/questions/10695053/compiling-fftw3-for-ios-5-1-on-osx-10-7

I am trying to use FFTW for image convolution. At first just to test if the system is working properly, I performed the fft, then the inverse fft, and could get the exact same image returned. Then a small step forward, I used the identity kernel(i.e., kernel[0][0] = 1 whereas all the other components equal 0). I took the component-wise product between the image and kernel(both in the frequency domain), then did the inverse fft. Theoretically I should be able to get the identical image back. But the result I got is very not even close to the original image. I am suspecting this has something to

I am compiling a test program to test the fftw3 (ver3.3.4). Since it is not installed with root previlidge the command I used is: gcc -lm -L/home/my_name/opt/fftw-3.3.4/lib/ -I/home/my_name/opt/fftw-3.3.4/include/ fftwtest.c where the library is installed in /home/my_name/opt/fftw-3.3.4/ My code is the 1st tutorial on fftw3's website: #include <stdio.h> #include <fftw3.h> int main(){ int n = 10; fftw_complex *in, *out; fftw_plan p; in = (fftw_complex*) fftw_malloc(n*sizeof(fftw_complex)); out = (fftw_complex*) fftw_malloc(n*sizeof(fftw_complex)); p = fftw_plan_dft_1d(n, in, out, FFTW_FORWARD,

I'm trying to use FFTW to compute fast summations, and I've run into an issue: int numFreq3 = numFreq*numFreq*numFreq; FFTW_complex* dummy_sq_fft = (FFTW_complex*)FFTW_malloc( sizeof(FFTW_complex)*numFreq3 ); FFTW_complex* dummy_sq = (FFTW_complex*)FFTW_malloc( sizeof(FFTW_complex)*numFreq3 ); FFTW_complex* orig = (FFTW_complex*)FFTW_malloc( sizeof(FFTW_complex)*numFreq3 ); FFTW_plan dummyPlan = FFTW_plan_dft_3d( numFreq, numFreq, numFreq, orig, dummy_sq_fft, FFTW_FORWARD, FFTW_MEASURE ); FFTW_plan dummyInvPlan = FFTW_plan_dft_3d( numFreq, numFreq, numFreq, dummy_sq_fft, dummy_sq, FFTW