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/* ----------------------------------------------------------------------
* Project: CMSIS DSP Library
* Title: arm_mfcc_init_q31.c
* Description: MFCC initialization function for the q31 version
*
* $Date: 07 September 2021
* $Revision: V1.10.0
*
* Target Processor: Cortex-M and Cortex-A cores
* -------------------------------------------------------------------- */
/*
* Copyright (C) 2010-2021 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.
*/
#include "arm_compiler_specific.h"
#if defined(ARM_MATH_NEON)
#define RFFT_INIT(L) \
status=arm_rfft_init_q31(&(S->rfft),L);
#define RFFT_INIT_WITH_LEN(L) \
status=arm_rfft_init_##L##_q31(&(S->rfft));
#else
#define RFFT_INIT(L) \
status=arm_rfft_init_q31(&(S->rfft),L,0,1);
#define RFFT_INIT_WITH_LEN(L) \
status=arm_rfft_init_##L##_q31(&(S->rfft),0,1);
#endif
/**
* @defgroup MFCCQ31 MFCC Q31
*/
/**
@ingroup MFCC
*/
/**
@addtogroup MFCCQ31
@{
*/
#include "dsp/transform_functions.h"
/**
@brief Generic initialization of the MFCC Q31 instance structure
@param[out] S points to the mfcc instance structure
@param[in] fftLen fft length
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
@par
This function should be used only if you don't know the FFT sizes that
you'll need at build time. The use of this function will prevent the
linker from removing the FFT tables that are not needed and the library
code size will be bigger than needed.
@par
If you use CMSIS-DSP as a static library, and if you know the MFCC sizes
that you need at build time, then it is better to use the initialization
functions defined for each MFCC size.
*/
ARM_DSP_ATTRIBUTE arm_status arm_mfcc_init_q31(
arm_mfcc_instance_q31 * S,
uint32_t fftLen,
uint32_t nbMelFilters,
uint32_t nbDctOutputs,
const q31_t *dctCoefs,
const uint32_t *filterPos,
const uint32_t *filterLengths,
const q31_t *filterCoefs,
const q31_t *windowCoefs
)
{
arm_status status;
S->fftLen=fftLen;
S->nbMelFilters=nbMelFilters;
S->nbDctOutputs=nbDctOutputs;
S->dctCoefs=dctCoefs;
S->filterPos=filterPos;
S->filterLengths=filterLengths;
S->filterCoefs=filterCoefs;
S->windowCoefs=windowCoefs;
#if defined(ARM_MFCC_USE_CFFT)
status=arm_cfft_init_q31(&(S->cfft),fftLen);
#else
RFFT_INIT(fftLen);
#endif
return(status);
}
#if defined(ARM_MFCC_USE_CFFT)
#define MFCC_INIT_Q31(LEN) \
ARM_DSP_ATTRIBUTE arm_status arm_mfcc_init_##LEN##_q31( \
arm_mfcc_instance_q31 * S, \
uint32_t nbMelFilters, \
uint32_t nbDctOutputs, \
const q31_t *dctCoefs, \
const uint32_t *filterPos, \
const uint32_t *filterLengths, \
const q31_t *filterCoefs, \
const q31_t *windowCoefs \
) \
{ \
arm_status status; \
\
S->fftLen=LEN; \
S->nbMelFilters=nbMelFilters; \
S->nbDctOutputs=nbDctOutputs; \
S->dctCoefs=dctCoefs; \
S->filterPos=filterPos; \
S->filterLengths=filterLengths; \
S->filterCoefs=filterCoefs; \
S->windowCoefs=windowCoefs; \
\
status=arm_cfft_init_##LEN##_q31(&(S->cfft));\
\
return(status); \
}
#else
#define MFCC_INIT_Q31(LEN) \
ARM_DSP_ATTRIBUTE arm_status arm_mfcc_init_##LEN##_q31( \
arm_mfcc_instance_q31 * S, \
uint32_t nbMelFilters, \
uint32_t nbDctOutputs, \
const q31_t *dctCoefs, \
const uint32_t *filterPos, \
const uint32_t *filterLengths, \
const q31_t *filterCoefs, \
const q31_t *windowCoefs \
) \
{ \
arm_status status; \
\
S->fftLen=LEN; \
S->nbMelFilters=nbMelFilters; \
S->nbDctOutputs=nbDctOutputs; \
S->dctCoefs=dctCoefs; \
S->filterPos=filterPos; \
S->filterLengths=filterLengths; \
S->filterCoefs=filterCoefs; \
S->windowCoefs=windowCoefs; \
\
RFFT_INIT_WITH_LEN(LEN); \
\
return(status); \
}
#endif
/**
@brief Initialization of the MFCC Q31 instance structure for 32 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(32)
/**
@brief Initialization of the MFCC Q31 instance structure for 64 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(64)
/**
@brief Initialization of the MFCC Q31 instance structure for 128 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(128)
/**
@brief Initialization of the MFCC Q31 instance structure for 256 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(256)
/**
@brief Initialization of the MFCC Q31 instance structure for 512 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(512)
/**
@brief Initialization of the MFCC Q31 instance structure for 1024 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(1024)
/**
@brief Initialization of the MFCC Q31 instance structure for 2048 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(2048)
/**
@brief Initialization of the MFCC Q31 instance structure for 4096 sample MFCC
@param[out] S points to the mfcc instance structure
@param[in] nbMelFilters number of Mel filters
@param[in] nbDctOutputs number of Dct outputs
@param[in] dctCoefs points to an array of DCT coefficients
@param[in] filterPos points of the array of filter positions
@param[in] filterLengths points to the array of filter lengths
@param[in] filterCoefs points to the array of filter coefficients
@param[in] windowCoefs points to the array of window coefficients
@return error status
@par Description
The matrix of Mel filter coefficients is sparse.
Most of the coefficients are zero.
To avoid multiplying the spectrogram by those zeros, the
filter is applied only to a given position in the spectrogram
and on a given number of FFT bins (the filter length).
It is the reason for the arrays filterPos and filterLengths.
window coefficients can describe (for instance) a Hamming window.
The array has the same size as the FFT length.
The folder Scripts is containing a Python script which can be used
to generate the filter, dct and window arrays.
*/
MFCC_INIT_Q31(4096)
#undef RFFT_INIT
#undef RFFT_INIT_WITH_LEN
/**
@} end of MFCCQ31 group
*/
|
