Computation of a transform using TT interface is conceptually divided into four steps, each of which is performed via a dedicated routine. Table "TT Interface Routines" lists the routines and briefly describes their purpose and use.
The section gives detailed description of TT routines, their syntax, parameters and values they return. Double-precision and single-precision versions of the same routine are described together.
TT routines call Intel MKL FFT interface (described in FFT Functions), which enhances performance of the routines.
Initializes basic data structures of a Trigonometric Transform.
Checks consistency and correctness of user's data as well as initializes certain data structures required to perform the Trigonometric Transform.
Computes the forward Trigonometric Transform of type specified by the parameter.
Computes the backward Trigonometric Transform of type specified by the parameter.