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/******************************************************************************
* @file transform_functions_f16.h
* @brief Public header file for CMSIS DSP Library
* @version V1.10.0
* @date 08 July 2021
* Target Processor: Cortex-M and Cortex-A cores
******************************************************************************/
/*
* Copyright (c) 2010-2020 Arm Limited or its affiliates. All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _TRANSFORM_FUNCTIONS_F16_H_
#define _TRANSFORM_FUNCTIONS_F16_H_
#include "arm_math_types_f16.h"
#include "arm_math_memory.h"
#include "dsp/none.h"
#include "dsp/utils.h"
#ifdef __cplusplus
extern "C"
{
#endif
#if defined(ARM_FLOAT16_SUPPORTED)
/**
* @brief Instance structure for the floating-point CFFT/CIFFT function.
*/
typedef struct
{
uint16_t fftLen; /**< length of the FFT. */
uint8_t ifftFlag; /**< flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. */
uint8_t bitReverseFlag; /**< flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. */
const float16_t *pTwiddle; /**< points to the Twiddle factor table. */
const uint16_t *pBitRevTable; /**< points to the bit reversal table. */
uint16_t twidCoefModifier; /**< twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. */
uint16_t bitRevFactor; /**< bit reversal modifier that supports different size FFTs with the same bit reversal table. */
float16_t onebyfftLen; /**< value of 1/fftLen. */
} arm_cfft_radix2_instance_f16;
/**
* @brief Instance structure for the floating-point CFFT/CIFFT function.
*/
typedef struct
{
uint16_t fftLen; /**< length of the FFT. */
uint8_t ifftFlag; /**< flag that selects forward (ifftFlag=0) or inverse (ifftFlag=1) transform. */
uint8_t bitReverseFlag; /**< flag that enables (bitReverseFlag=1) or disables (bitReverseFlag=0) bit reversal of output. */
const float16_t *pTwiddle; /**< points to the Twiddle factor table. */
const uint16_t *pBitRevTable; /**< points to the bit reversal table. */
uint16_t twidCoefModifier; /**< twiddle coefficient modifier that supports different size FFTs with the same twiddle factor table. */
uint16_t bitRevFactor; /**< bit reversal modifier that supports different size FFTs with the same bit reversal table. */
float16_t onebyfftLen; /**< value of 1/fftLen. */
} arm_cfft_radix4_instance_f16;
/**
* @brief Instance structure for the floating-point CFFT/CIFFT function.
*/
typedef struct
{
uint16_t fftLen; /**< length of the FFT. */
const float16_t *pTwiddle; /**< points to the Twiddle factor table. */
const uint16_t *pBitRevTable; /**< points to the bit reversal table. */
uint16_t bitRevLength; /**< bit reversal table length. */
#if defined(ARM_MATH_MVEF) && !defined(ARM_MATH_AUTOVECTORIZE)
const uint32_t *rearranged_twiddle_tab_stride1_arr; /**< Per stage reordered twiddle pointer (offset 1) */ \
const uint32_t *rearranged_twiddle_tab_stride2_arr; /**< Per stage reordered twiddle pointer (offset 2) */ \
const uint32_t *rearranged_twiddle_tab_stride3_arr; /**< Per stage reordered twiddle pointer (offset 3) */ \
const float16_t *rearranged_twiddle_stride1; /**< reordered twiddle offset 1 storage */ \
const float16_t *rearranged_twiddle_stride2; /**< reordered twiddle offset 2 storage */ \
const float16_t *rearranged_twiddle_stride3;
#endif
} arm_cfft_instance_f16;
arm_status arm_cfft_init_f16(
arm_cfft_instance_f16 * S,
uint16_t fftLen);
void arm_cfft_f16(
const arm_cfft_instance_f16 * S,
float16_t * p1,
uint8_t ifftFlag,
uint8_t bitReverseFlag);
/**
* @brief Instance structure for the floating-point RFFT/RIFFT function.
*/
typedef struct
{
arm_cfft_instance_f16 Sint; /**< Internal CFFT structure. */
uint16_t fftLenRFFT; /**< length of the real sequence */
const float16_t * pTwiddleRFFT; /**< Twiddle factors real stage */
} arm_rfft_fast_instance_f16 ;
arm_status arm_rfft_fast_init_f16 (
arm_rfft_fast_instance_f16 * S,
uint16_t fftLen);
void arm_rfft_fast_f16(
const arm_rfft_fast_instance_f16 * S,
float16_t * p, float16_t * pOut,
uint8_t ifftFlag);
/* Deprecated */
arm_status arm_cfft_radix4_init_f16(
arm_cfft_radix4_instance_f16 * S,
uint16_t fftLen,
uint8_t ifftFlag,
uint8_t bitReverseFlag);
/* Deprecated */
void arm_cfft_radix4_f16(
const arm_cfft_radix4_instance_f16 * S,
float16_t * pSrc);
/* Deprecated */
arm_status arm_cfft_radix2_init_f16(
arm_cfft_radix2_instance_f16 * S,
uint16_t fftLen,
uint8_t ifftFlag,
uint8_t bitReverseFlag);
/* Deprecated */
void arm_cfft_radix2_f16(
const arm_cfft_radix2_instance_f16 * S,
float16_t * pSrc);
/**
* @brief Instance structure for the Floating-point MFCC function.
*/
typedef struct
{
const float16_t *dctCoefs; /**< Internal DCT coefficients */
const float16_t *filterCoefs; /**< Internal Mel filter coefficients */
const float16_t *windowCoefs; /**< Windowing coefficients */
const uint32_t *filterPos; /**< Internal Mel filter positions in spectrum */
const uint32_t *filterLengths; /**< Internal Mel filter lengths */
uint32_t fftLen; /**< FFT length */
uint32_t nbMelFilters; /**< Number of Mel filters */
uint32_t nbDctOutputs; /**< Number of DCT outputs */
#if defined(ARM_MFCC_CFFT_BASED)
/* Implementation of the MFCC is using a CFFT */
arm_cfft_instance_f16 cfft; /**< Internal CFFT instance */
#else
/* Implementation of the MFCC is using a RFFT (default) */
arm_rfft_fast_instance_f16 rfft;
#endif
} arm_mfcc_instance_f16 ;
arm_status arm_mfcc_init_f16(
arm_mfcc_instance_f16 * S,
uint32_t fftLen,
uint32_t nbMelFilters,
uint32_t nbDctOutputs,
const float16_t *dctCoefs,
const uint32_t *filterPos,
const uint32_t *filterLengths,
const float16_t *filterCoefs,
const float16_t *windowCoefs
);
/**
@brief MFCC F16
@param[in] S points to the mfcc instance structure
@param[in] pSrc points to the input samples
@param[out] pDst points to the output MFCC values
@param[inout] pTmp points to a temporary buffer of complex
@return none
*/
void arm_mfcc_f16(
const arm_mfcc_instance_f16 * S,
float16_t *pSrc,
float16_t *pDst,
float16_t *pTmp
);
#endif /* defined(ARM_FLOAT16_SUPPORTED)*/
#ifdef __cplusplus
}
#endif
#endif /* ifndef _TRANSFORM_FUNCTIONS_F16_H_ */
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