Performs the same operation as `v`

, but on multiple signals with a single call.

SDKs

- iOS 4.0+
- macOS 10.2+
- Mac Catalyst 13.0+Beta
- tvOS 9.0+
- watchOS 2.0+

Framework

- Accelerate

## Declaration

## Parameters

`__Setup`

Points to a structure initialized by a prior call to the FFT setup data function,

`v`

. The value supplied as parameterDSP _create _fftsetup `Log2n`

of the earlier call to the setup function must equal or exceed the value supplied as parameter`Log2N`

of this transform function.`__C`

Complex input/output vector where multiple signals are concatenated.

`__IC`

Stride between elements in

`C`

. The value of`IC`

should be 1 for best performance.`__IM`

The number of elements between the first element of one input signal and the first element of the next (which is also the length of each input signal, measured in elements).

`__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 forward/inverse directional flag, which must specify

`k`

(+1) orFFTDirection _Forward `k`

(-1).FFTDirection _Inverse

## Discussion

This function performs discrete Fourier transforms on multiple input signals using a single call. This function works for input signals of 4 points or greater. Each of the input signals processed by a given call must have the same length and address stride.

This function computes the in-place complex discrete Fourier transforms of the input signals, either from the time domain to the frequency domain (forward) or from the frequency domain to the time domain (inverse).

This function performs the following operation:g

See also functions `v`

, `v`

, and vDSP Programming Guide.