CMSIS DSP Library from CMSIS 2.0. See http://www.onarm.com/cmsis/ for full details

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arm_dct4_instance_q15 Struct Reference

arm_dct4_instance_q15 Struct Reference

Instance structure for the Q15 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.
q15_t normalize
 normalizing factor.
q15_t * pTwiddle
 points to the twiddle factor table.
q15_t * pCosFactor
 points to the cosFactor table.
arm_rfft_instance_q15pRfft
 points to the real FFT instance.
arm_cfft_radix4_instance_q15pCfft
 points to the complex FFT instance.

Detailed Description

Instance structure for the Q15 DCT4/IDCT4 function.

Definition at line 2322 of file arm_math.h.


Field Documentation

uint16_t N

length of the DCT4.

Definition at line 2324 of file arm_math.h.

uint16_t Nby2

half of the length of the DCT4.

Definition at line 2325 of file arm_math.h.

q15_t normalize

normalizing factor.

Definition at line 2326 of file arm_math.h.

points to the complex FFT instance.

Definition at line 2330 of file arm_math.h.

q15_t* pCosFactor

points to the cosFactor table.

Definition at line 2328 of file arm_math.h.

points to the real FFT instance.

Definition at line 2329 of file arm_math.h.

q15_t* pTwiddle

points to the twiddle factor table.

Definition at line 2327 of file arm_math.h.