46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
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/*
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* Copyright (c) 2018, Intel Corporation
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* All rights reserved.
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*
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* Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
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* Sathish Kuttan <sathish.k.kuttan@intel.com>
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/* PDM decimation FIR filters */
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#include <zephyr.h>
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#include "pdm_decim_fir.h"
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extern struct pdm_decim pdm_decim_int32_02_4375_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_02_4288_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_03_4375_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_03_3850_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_04_4375_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_05_4331_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_06_4156_5100_010_095;
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extern struct pdm_decim pdm_decim_int32_08_4156_5380_010_090;
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/* Note: Higher spec filter must be before lower spec filter
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* if there are multiple filters for a decimation factor. The naming
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* scheme of coefficients set is:
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* <type>_<decim factor>_<rel passband>_<rel stopband>_<ripple>_<attenuation>
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*/
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static struct pdm_decim *fir_list[DMIC_FIR_LIST_LENGTH] = {
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&pdm_decim_int32_02_4375_5100_010_095,
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&pdm_decim_int32_02_4288_5100_010_095,
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&pdm_decim_int32_03_4375_5100_010_095,
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&pdm_decim_int32_03_3850_5100_010_095,
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&pdm_decim_int32_04_4375_5100_010_095,
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&pdm_decim_int32_05_4331_5100_010_095,
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&pdm_decim_int32_06_4156_5100_010_095,
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&pdm_decim_int32_08_4156_5380_010_090,
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};
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struct pdm_decim **pdm_decim_get_fir_list(void)
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{
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return fir_list;
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}
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