arm_dct4_instance_f32 Struct Reference

Instance structure for the floating-point DCT4/IDCT4 function. More...

Data Fields
uint16_t	N
uint16_t	Nby2
float32_t	normalize
const float32_t *	pTwiddle
const float32_t *	pCosFactor
arm_rfft_instance_f32 *	pRfft
arm_cfft_radix4_instance_f32 *	pCfft

Description

Instance structure for the floating-point DCT4/IDCT4 function.

Field Documentation

N

uint16_t N

length of the DCT4.

Nby2

uint16_t Nby2

half of the length of the DCT4.

normalize

float32_t normalize

normalizing factor.

pCfft

arm_cfft_radix4_instance_f32* pCfft

points to the complex FFT instance.

pCosFactor

const float32_t* pCosFactor

points to the cosFactor table.

pRfft

arm_rfft_instance_f32* pRfft

points to the real FFT instance.

pTwiddle

const float32_t* pTwiddle

points to the twiddle factor table.