# vDSP_DFTFunctions A protocol that defines functions for discrete Fourier transform operations. ``` protocol vDSP_DFTFunctions ``` ## Topics ### Associated Types [`associatedtype Scalar`](/documentation/Accelerate/vDSP_DFTFunctions/Scalar) ### Type Methods [`static func destroySetup(OpaquePointer)`](/documentation/Accelerate/vDSP_DFTFunctions/destroySetup(_:)) [`static func makeDFTSetup(previous: vDSP.DFT?, count: Int, direction: vDSP.FourierTransformDirection, transformType: vDSP.DFTTransformType) -> OpaquePointer?`](/documentation/Accelerate/vDSP_DFTFunctions/makeDFTSetup(previous:count:direction:transformType:)) [`static func transform(dftSetup: OpaquePointer, inputReal: U, inputImaginary: U, outputReal: inout V, outputImaginary: inout V)`](/documentation/Accelerate/vDSP_DFTFunctions/transform(dftSetup:inputReal:inputImaginary:outputReal:outputImaginary:)) ## Relationships ### Conforming Types [`VectorizableFloat`](/documentation/Accelerate/vDSP/VectorizableFloat) [`VectorizableDouble`](/documentation/Accelerate/vDSP/VectorizableDouble) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)