Eli Hughes
V4.0.1 of the ARM CMSIS DSP libraries. Note that arm_bitreversal2.s, arm_cfft_f32.c and arm_rfft_fast_f32.c had to be removed. arm_bitreversal2.s will not assemble with the online tools. So, the fast f32 FFT functions are not yet available. All the other FFT functions are available.
Dependents: MPU9150_Example fir_f32 fir_f32 MPU9150_nucleo_noni2cdev ... more
arm_dct4_instance_q31 Struct Reference
Instance structure for the Q31 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. | |
| q31_t | normalize |
| normalizing factor. | |
| q31_t * | pTwiddle |
| points to the twiddle factor table. | |
| q31_t * | pCosFactor |
| points to the cosFactor table. | |
| arm_rfft_instance_q31 * | pRfft |
| points to the real FFT instance. | |
| arm_cfft_radix4_instance_q31 * | pCfft |
| points to the complex FFT instance. | |
Detailed Description
Instance structure for the Q31 DCT4/IDCT4 function.
Definition at line 2357 of file arm_math.h.
Field Documentation
| uint16_t N |
length of the DCT4.
Definition at line 2359 of file arm_math.h.
| uint16_t Nby2 |
half of the length of the DCT4.
Definition at line 2360 of file arm_math.h.
| q31_t normalize |
normalizing factor.
Definition at line 2361 of file arm_math.h.
points to the complex FFT instance.
Definition at line 2365 of file arm_math.h.
| q31_t* pCosFactor |
points to the cosFactor table.
Definition at line 2363 of file arm_math.h.
points to the real FFT instance.
Definition at line 2364 of file arm_math.h.
| q31_t* pTwiddle |
points to the twiddle factor table.
Definition at line 2362 of file arm_math.h.
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