CMSIS-DSP  Version 1.10.0
CMSIS DSP Software Library
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
arm_dct4_instance_f32 Struct Reference

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

Data Fields

uint16_t N
uint16_t Nby2
float32_t normalize
const float32_tpTwiddle
const float32_tpCosFactor

Field Documentation

uint16_t N

length of the DCT4.

uint16_t Nby2

half of the length of the DCT4.

float32_t normalize

normalizing factor.

points to the complex FFT instance.

const float32_t* pCosFactor

points to the cosFactor table.

points to the real FFT instance.

const float32_t* pTwiddle

points to the twiddle factor table.