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151 lines
5.4 KiB
C
151 lines
5.4 KiB
C
/* ----------------------------------------------------------------------
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* Project: CMSIS DSP Library
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* Title: arm_cfft_init_f64.c
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* Description: Initialization function for cfft f64 instance
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*
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* $Date: 23 April 2021
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* $Revision: V1.9.0
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*
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* Target Processor: Cortex-M and Cortex-A cores
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* -------------------------------------------------------------------- */
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/*
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* Copyright (C) 2010-2021 ARM Limited or its affiliates. All rights reserved.
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the License); you may
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* not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an AS IS BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define FFTINIT(EXT,SIZE) \
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S->bitRevLength = arm_cfft_sR_##EXT##_len##SIZE.bitRevLength; \
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S->pBitRevTable = arm_cfft_sR_##EXT##_len##SIZE.pBitRevTable; \
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S->pTwiddle = arm_cfft_sR_##EXT##_len##SIZE.pTwiddle;
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/**
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@addtogroup ComplexFFT
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@{
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*/
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/**
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@brief Initialization function for the cfft f64 function
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@param[in,out] S points to an instance of the floating-point CFFT structure
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@param[in] fftLen fft length (number of complex samples)
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@return execution status
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- \ref ARM_MATH_SUCCESS : Operation successful
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- \ref ARM_MATH_ARGUMENT_ERROR : an error is detected
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@par Use of this function is mandatory only for the MVE version of the FFT.
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Other versions can still initialize directly the data structure using
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variables declared in arm_const_structs.h
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*/
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#include "dsp/transform_functions.h"
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#include "arm_common_tables.h"
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#include "arm_const_structs.h"
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arm_status arm_cfft_init_f64(
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arm_cfft_instance_f64 * S,
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uint16_t fftLen)
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{
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/* Initialise the default arm status */
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arm_status status = ARM_MATH_SUCCESS;
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/* Initialise the FFT length */
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S->fftLen = fftLen;
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/* Initialise the Twiddle coefficient pointer */
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S->pTwiddle = NULL;
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/* Initializations of Instance structure depending on the FFT length */
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switch (S->fftLen) {
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_4096) && defined(ARM_TABLE_BITREVIDX_FLT_4096))
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/* Initializations of structure parameters for 4096 point FFT */
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case 4096U:
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/* Initialise the bit reversal table modifier */
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FFTINIT(f64,4096);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_2048) && defined(ARM_TABLE_BITREVIDX_FLT_2048))
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/* Initializations of structure parameters for 2048 point FFT */
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case 2048U:
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/* Initialise the bit reversal table modifier */
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FFTINIT(f64,2048);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_1024) && defined(ARM_TABLE_BITREVIDX_FLT_1024))
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/* Initializations of structure parameters for 1024 point FFT */
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case 1024U:
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/* Initialise the bit reversal table modifier */
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FFTINIT(f64,1024);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_512) && defined(ARM_TABLE_BITREVIDX_FLT_512))
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/* Initializations of structure parameters for 512 point FFT */
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case 512U:
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/* Initialise the bit reversal table modifier */
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FFTINIT(f64,512);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_256) && defined(ARM_TABLE_BITREVIDX_FLT_256))
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case 256U:
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FFTINIT(f64,256);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_128) && defined(ARM_TABLE_BITREVIDX_FLT_128))
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case 128U:
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FFTINIT(f64,128);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_64) && defined(ARM_TABLE_BITREVIDX_FLT_64))
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case 64U:
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FFTINIT(f64,64);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_32) && defined(ARM_TABLE_BITREVIDX_FLT_32))
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case 32U:
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FFTINIT(f64,32);
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break;
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#endif
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#if !defined(ARM_DSP_CONFIG_TABLES) || defined(ARM_ALL_FFT_TABLES) || (defined(ARM_TABLE_TWIDDLECOEF_F64_16) && defined(ARM_TABLE_BITREVIDX_FLT_16))
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case 16U:
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/* Initializations of structure parameters for 16 point FFT */
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FFTINIT(f64,16);
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break;
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#endif
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default:
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/* Reporting argument error if fftSize is not valid value */
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status = ARM_MATH_ARGUMENT_ERROR;
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break;
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}
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return (status);
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}
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/**
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@} end of ComplexFFT group
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*/
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