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vDSP_fftm_zip

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

Declaration

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

Parameters

  • __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.

  • __IM:

    The increment, in elements, between input signals. This parameter also specifies the length of each input signal.

  • __Log2N:

    The base 2 exponent of the number of elements to process in a single input signal. For example, to process 512 elements, specify 9 for parameter Log2N.

  • __M:

    The number of signals.

  • __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.

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See Also

In-Place FFT Functions