Function Descriptions
3.15 Real Fast Fourier Transform Twiddle Factors
Description:
This module generates the twiddle factors used by the real FFT.
Header File:
FPU.h
Declaration:
void RFFT_f32_sincostable (RFFT_F32_STRUCT
*
)
Usage:
A pointer to the following structure is passed to the RFFT_f32_sincostable function. It is the
same structure described in the RFFT_f32 section:
typedef struct {
float32
*
InBuf;
float32
*
OutBuf;
float32
*
CosSinBuf;
float32
*
MagBuf;
float32
*
PhaseBuf;
Uint16 FFTSize;
Uint16 FFTStages;
} RFFT_F32_STRUCT;
Table 3.11 describes each element.
Alignment Requirements:
None
Sep 10, 2012 44
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