1 #if CONFIG_WLS_CSI_PROC 2 /** @file wls_radix4Fft.h 3 * 4 * @brief This file contains header file for fixed-point FFT functions 5 * 6 * Copyright 2023-2024 NXP 7 * 8 * SPDX-License-Identifier: BSD-3-Clause 9 * 10 */ 11 12 /************************************************************************ 13 * DFW header file for fixed-point FFT functions 14 ************************************************************************/ 15 16 #ifndef WLS_RADIX4_FFT 17 #define WLS_RADIX4_FFT 18 19 #include "wls_param_defines.h" 20 21 #define INT8 signed char 22 #define INT16 short 23 #define INT32 int 24 #ifdef STA_20_ONLY 25 #define MAX_FFT_SIZE_256 26 #define MAX_FFT_SIZE 256 27 #else 28 #define MAX_FFT_SIZE_2048 29 #define MAX_FFT_SIZE 2048 30 #endif 31 // #define TWIDDLE_HALF_SIZE 32 #define TWIDDLE_BIPT 15 33 // #define BIASED_ROUNDING 34 35 // call separate stages 36 void radix4FftStageOne(INT16 *pSrc, INT16 *pDst, int Nfft); 37 void radix4FftMainStages(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 38 void radix4FftLastStage(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 39 40 void radix4IfftStageOne(INT16 *pSrc, INT16 *pDst, int Nfft); 41 void radix4IfftMainStages(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 42 void radix4IfftLastStage(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 43 44 // auxiliary function 45 unsigned int reverse(register unsigned int x); 46 #ifndef ARM_DS5 47 int __clz(int x); 48 #endif 49 50 void radix4Fft(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 51 void radix4Fft4in64(unsigned int *loadPtr, unsigned int *fftOutBfr, const INT16 *pCoeff, int lenCoeff); 52 53 void radix4Ifft(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 54 void radix4IfftParallel(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 55 void radix4IfftStride(INT16 *pSrc, INT16 *pDst, int Nfft, const INT16 *pCoeff, int lenCoeff); 56 57 void radix2Ifft(INT16 *pSrc, int Nfft, const INT16 *pCoeff, int lenCoeff); 58 void radix2IfftParallel(INT16 *pSrc, int Nfft, const INT16 *pCoeff, int lenCoeff); 59 void radix2IfftStride(INT16 *pSrc, int Nfft, const INT16 *pCoeff, int lenCoeff); 60 61 void radix2FftFlt(float *pBfr, int Nfft, const float *pCoeff, int lenCoeff); 62 void radix2IfftFlt(float *pBfr, int Nfft, const float *pCoeff, int lenCoeff); 63 64 #define MAX_FFT_FLT 64 65 extern const float twiddleTableFlt[2 * MAX_FFT_FLT]; 66 67 #ifdef TWIDDLE_HALF_SIZE 68 extern const INT16 radix4FftTwiddleArr[MAX_FFT_SIZE]; 69 #else 70 extern const INT16 radix4FftTwiddleArr[2 * MAX_FFT_SIZE]; 71 #endif 72 73 #endif 74 75 #endif /* CONFIG_WLS_CSI_PROC */ 76
