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209 lines
7.8 KiB
C
209 lines
7.8 KiB
C
/******************************************************************************
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* @file transform_functions_f16.h
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* @brief Public header file for CMSIS DSP Library
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* @version V1.10.0
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* @date 08 July 2021
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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) 2010-2020 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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#ifndef _TRANSFORM_FUNCTIONS_F16_H_
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#define _TRANSFORM_FUNCTIONS_F16_H_
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#include "arm_math_types_f16.h"
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#include "arm_math_memory.h"
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#include "dsp/none.h"
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#include "dsp/utils.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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#if defined(ARM_FLOAT16_SUPPORTED)
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/**
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* @brief Instance structure for the floating-point CFFT/CIFFT function.
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*/
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typedef struct
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{
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uint16_t fftLen; /**< length of the FFT. */
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uint8_t ifftFlag; /**< flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. */
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uint8_t bitReverseFlag; /**< flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. */
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const float16_t *pTwiddle; /**< points to the Twiddle factor table. */
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const uint16_t *pBitRevTable; /**< points to the bit reversal table. */
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uint16_t twidCoefModifier; /**< twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. */
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uint16_t bitRevFactor; /**< bit reversal modifier that supports different size FFTs with the same bit reversal table. */
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float16_t onebyfftLen; /**< value of 1/fftLen. */
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} arm_cfft_radix2_instance_f16;
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/**
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* @brief Instance structure for the floating-point CFFT/CIFFT function.
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*/
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typedef struct
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{
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uint16_t fftLen; /**< length of the FFT. */
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uint8_t ifftFlag; /**< flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. */
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uint8_t bitReverseFlag; /**< flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. */
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const float16_t *pTwiddle; /**< points to the Twiddle factor table. */
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const uint16_t *pBitRevTable; /**< points to the bit reversal table. */
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uint16_t twidCoefModifier; /**< twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. */
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uint16_t bitRevFactor; /**< bit reversal modifier that supports different size FFTs with the same bit reversal table. */
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float16_t onebyfftLen; /**< value of 1/fftLen. */
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} arm_cfft_radix4_instance_f16;
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/**
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* @brief Instance structure for the floating-point CFFT/CIFFT function.
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*/
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typedef struct
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{
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uint16_t fftLen; /**< length of the FFT. */
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const float16_t *pTwiddle; /**< points to the Twiddle factor table. */
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const uint16_t *pBitRevTable; /**< points to the bit reversal table. */
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uint16_t bitRevLength; /**< bit reversal table length. */
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#if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE)
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const uint32_t *rearranged_twiddle_tab_stride1_arr; /**< Per stage reordered twiddle pointer (offset 1) */ \
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const uint32_t *rearranged_twiddle_tab_stride2_arr; /**< Per stage reordered twiddle pointer (offset 2) */ \
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const uint32_t *rearranged_twiddle_tab_stride3_arr; /**< Per stage reordered twiddle pointer (offset 3) */ \
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const float16_t *rearranged_twiddle_stride1; /**< reordered twiddle offset 1 storage */ \
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const float16_t *rearranged_twiddle_stride2; /**< reordered twiddle offset 2 storage */ \
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const float16_t *rearranged_twiddle_stride3;
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#endif
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} arm_cfft_instance_f16;
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arm_status arm_cfft_init_f16(
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arm_cfft_instance_f16 * S,
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uint16_t fftLen);
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void arm_cfft_f16(
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const arm_cfft_instance_f16 * S,
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float16_t * p1,
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uint8_t ifftFlag,
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uint8_t bitReverseFlag);
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/**
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* @brief Instance structure for the floating-point RFFT/RIFFT function.
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*/
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typedef struct
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{
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arm_cfft_instance_f16 Sint; /**< Internal CFFT structure. */
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uint16_t fftLenRFFT; /**< length of the real sequence */
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const float16_t * pTwiddleRFFT; /**< Twiddle factors real stage */
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} arm_rfft_fast_instance_f16 ;
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arm_status arm_rfft_fast_init_f16 (
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arm_rfft_fast_instance_f16 * S,
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uint16_t fftLen);
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void arm_rfft_fast_f16(
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const arm_rfft_fast_instance_f16 * S,
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float16_t * p, float16_t * pOut,
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uint8_t ifftFlag);
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/* Deprecated */
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arm_status arm_cfft_radix4_init_f16(
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arm_cfft_radix4_instance_f16 * S,
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uint16_t fftLen,
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uint8_t ifftFlag,
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uint8_t bitReverseFlag);
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/* Deprecated */
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void arm_cfft_radix4_f16(
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const arm_cfft_radix4_instance_f16 * S,
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float16_t * pSrc);
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/* Deprecated */
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arm_status arm_cfft_radix2_init_f16(
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arm_cfft_radix2_instance_f16 * S,
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uint16_t fftLen,
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uint8_t ifftFlag,
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uint8_t bitReverseFlag);
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/* Deprecated */
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void arm_cfft_radix2_f16(
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const arm_cfft_radix2_instance_f16 * S,
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float16_t * pSrc);
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/**
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* @brief Instance structure for the Floating-point MFCC function.
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*/
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typedef struct
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{
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const float16_t *dctCoefs; /**< Internal DCT coefficients */
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const float16_t *filterCoefs; /**< Internal Mel filter coefficients */
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const float16_t *windowCoefs; /**< Windowing coefficients */
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const uint32_t *filterPos; /**< Internal Mel filter positions in spectrum */
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const uint32_t *filterLengths; /**< Internal Mel filter lengths */
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uint32_t fftLen; /**< FFT length */
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uint32_t nbMelFilters; /**< Number of Mel filters */
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uint32_t nbDctOutputs; /**< Number of DCT outputs */
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#if defined(ARM_MFCC_CFFT_BASED)
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/* Implementation of the MFCC is using a CFFT */
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arm_cfft_instance_f16 cfft; /**< Internal CFFT instance */
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#else
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/* Implementation of the MFCC is using a RFFT (default) */
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arm_rfft_fast_instance_f16 rfft;
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#endif
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} arm_mfcc_instance_f16 ;
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arm_status arm_mfcc_init_f16(
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arm_mfcc_instance_f16 * S,
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uint32_t fftLen,
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uint32_t nbMelFilters,
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uint32_t nbDctOutputs,
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const float16_t *dctCoefs,
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const uint32_t *filterPos,
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const uint32_t *filterLengths,
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const float16_t *filterCoefs,
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const float16_t *windowCoefs
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);
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/**
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@brief MFCC F16
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@param[in] S points to the mfcc instance structure
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@param[in] pSrc points to the input samples
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@param[out] pDst points to the output MFCC values
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@param[inout] pTmp points to a temporary buffer of complex
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@return none
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*/
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void arm_mfcc_f16(
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const arm_mfcc_instance_f16 * S,
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float16_t *pSrc,
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float16_t *pDst,
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float16_t *pTmp
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);
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#endif /* defined(ARM_FLOAT16_SUPPORTED)*/
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#ifdef __cplusplus
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}
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#endif
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#endif /* ifndef _TRANSFORM_FUNCTIONS_F16_H_ */
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