/* SPDX-License-Identifier: BSD-3-Clause

*

* Copyright(c) 2017 Intel Corporation. All rights reserved.

*

* Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>

* Liam Girdwood <liam.r.girdwood@linux.intel.com>

* Keyon Jie <yang.jie@linux.intel.com>

*/

#ifndef __SOF_MATH_FIR_GENERIC_H__

#define __SOF_MATH_FIR_GENERIC_H__

#include <sof/math/fir_config.h>

#include <sof/common.h>

#if SOF_USE_HIFI(NONE, FILTER)

#include <sof/audio/audio_stream.h>

#include <sof/audio/format.h>

#include <user/fir.h>

#include <stdint.h>

struct comp_buffer;

struct sof_eq_fir_coef_data;

struct fir_state_32x16 {

int rwi; /* Circular read and write index */

int taps; /* Number of FIR taps */

int length; /* Number of FIR taps plus input length (even) */

int out_shift; /* Amount of right shifts at output */

int16_t *coef; /* Pointer to FIR coefficients */

int32_t *delay; /* Pointer to FIR delay line */

};

void fir_reset(struct fir_state_32x16 *fir);

int fir_delay_size(struct sof_fir_coef_data *config);

int fir_init_coef(struct fir_state_32x16 *fir,

struct sof_fir_coef_data *config);

void fir_init_delay(struct fir_state_32x16 *fir, int32_t **data);

int32_t fir_32x16(struct fir_state_32x16 *fir, int32_t x);

void fir_32x16_2x(struct fir_state_32x16 *fir, int32_t x0, int32_t x1, int32_t *y0, int32_t *y1);

#endif

#endif /* __SOF_MATH_FIR_GENERIC_H__ */