Fourier Transform on Android

Question

Are there any Android's API's, that implement the Fourier Transform using the device's DSP? Or are there any API's that permit using the device's DSP?

Thanks.

Answer 1

No, there is no public API for performing hardware accelerated FFT.

You can optimize native code by targeting the armeabi-v7a ABI in order to use the FPU. That's very useful for floating point FFT.

See CPU-ARCH-ABIS in the docs/ directory of the Android NDK.

Answer 2

Sorry this is a bit late, but if you want to calculate the Fourier transform in Android for a real or complex number you are better off using either jTransfrom or libgdx.FFT. libgdx uses KissFFT backend, not quite sure what jTransform uses.

Check out this example on how to implement libgdx:

http://www.digiphd.com/android-java-simple-fft-libgdx/

Hope this helps.