CfftFract32

Overview

Forward and inverse FFT of complex data

Discussion

Computes the forward or inverse FFT of complex data. The parameter .dir control whether a forward (= +1) or inverse (= -1) FFT is computed. The module supports multichannel signals.

Module Pack

Advanced

ClassID

classID = 1229

Type Definition

typedef struct _ModuleCfftFract32
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
INT32 dir;                                    // Transform direction.  Forward = 1. Inverse = -1
fract32 onebyBlockSize;                       // value of 1/BlockSize in fractional value
} ModuleCfftFract32Class;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
dir	int	const	0	1	-1, 1
onebyBlockSize	fract32	derived	0	0.5	Unrestricted

Pins

Input Pins


Name	in
Description	Complex input
Data type	fract32
Channel range	Unrestricted
Block size range	2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384, 32768, 65536
Sample rate range	Unrestricted
Complex support	Complex

Output Pins


Name	out
Description	Complex output
Data Type	fract32

Scratch Pins


Channel Count	1
Block size	2
Sample rate	48000

Matlab Usage

File Name: cfft_fract32_module.m 
 M=cfft_fract32_module(NAME, ISFFT) 
 Computes the forward or inverse FFT of complex input data.  The input 
 block size must be a power of 2.  The module supports multichannel 
 signals.  Arguments: 
    NAME - name of the module. 
    ISFFT :  1 for calculating FFT (default) 
             -1 for calculating IFFT