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arm_dct4_instance_q31 Struct Reference

arm_dct4_instance_q31 Struct Reference

Instance structure for the Q31 DCT4/IDCT4 function. More...

#include <arm_math.h>

Data Fields

uint16_t N
 length of the DCT4.
uint16_t Nby2
 half of the length of the DCT4.
q31_t normalize
 normalizing factor.
q31_t * pTwiddle
 points to the twiddle factor table.
q31_t * pCosFactor
 points to the cosFactor table.
arm_rfft_instance_q31pRfft
 points to the real FFT instance.
arm_cfft_radix4_instance_q31pCfft
 points to the complex FFT instance.

Detailed Description

Instance structure for the Q31 DCT4/IDCT4 function.

Definition at line 2301 of file arm_math.h.


Field Documentation

uint16_t N

length of the DCT4.

Definition at line 2303 of file arm_math.h.

uint16_t Nby2

half of the length of the DCT4.

Definition at line 2304 of file arm_math.h.

q31_t normalize

normalizing factor.

Definition at line 2305 of file arm_math.h.

points to the complex FFT instance.

Definition at line 2309 of file arm_math.h.

q31_t* pCosFactor

points to the cosFactor table.

Definition at line 2307 of file arm_math.h.

points to the real FFT instance.

Definition at line 2308 of file arm_math.h.

q31_t* pTwiddle

points to the twiddle factor table.

Definition at line 2306 of file arm_math.h.