vDSP_fft_zip

Computes a forward or inverse in-place, single-precision complex FFT.

Declaration

extern void vDSP_fft_zip(FFTSetup __Setup, const DSPSplitComplex *__C, vDSP_Stride __IC, vDSP_Length __Log2N, FFTDirection __Direction);

__Setup:
The FFT setup structure for this transform. The setup’s structure Log2N must be greater than or equal to this function’s Log2N.
__C:
A pointer to the input-output data.
__IC:
The stride between the elements in C, set to 1 for best performance.
__Log2N:
The base 2 exponent of the number of elements to process. For example, to process 1024 elements, specify 10 for parameter Log2N.
__Direction:
A flag that specifies the transform direction. Pass Kfftdirection_forward to transform from the time domain to the frequency domain. Pass Kfftdirection_inverse to transform from the frequency domain to the time domain.