arm_dct4_instance_q15 Struct Reference

Instance structure for the Q15 DCT4/IDCT4 function.

Data Fields
uint16_t	N
uint16_t	Nby2
q15_t	normalize
const q15_t *	pTwiddle
const q15_t *	pCosFactor
arm_rfft_instance_q15 *	pRfft
arm_cfft_radix4_instance_q15 *	pCfft

Field Documentation

N

uint16_t N

length of the DCT4.

Nby2

uint16_t Nby2

half of the length of the DCT4.

normalize

q15_t normalize

normalizing factor.

pCfft

arm_cfft_radix4_instance_q15* pCfft

points to the complex FFT instance.

pCosFactor

const q15_t* pCosFactor

points to the cosFactor table.

pRfft

arm_rfft_instance_q15* pRfft

points to the real FFT instance.

pTwiddle

const q15_t* pTwiddle

points to the twiddle factor table.