CMSIS-DSP  Verison 3.0
CMSIS DSP Software Library
arm_dct4_instance_q31 Struct Reference

Instance structure for the Q31 DCT4/IDCT4 function.

Data Fields

uint16_t N
uint16_t Nby2
q31_t normalize
q31_t * pTwiddle
q31_t * pCosFactor
arm_rfft_instance_q31pRfft
arm_cfft_radix4_instance_q31pCfft

Field Documentation

length of the DCT4.

half of the length of the DCT4.

normalizing factor.

points to the complex FFT instance.

points to the cosFactor table.

points to the real FFT instance.

points to the twiddle factor table.