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