Descriptor Manipulation Functions

There are three functions in this category: create a descriptor, commit a descriptor, and free a descriptor.

• DftiCreateDescriptorDM
  Allocates memory for the descriptor data structure and preliminarily initializes it.
• DftiCommitDescriptorDM
  Performs all initialization for the actual FFT computation.
• DftiFreeDescriptorDM
  Frees memory allocated for a descriptor.