/* 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_IIR_DF2T_H__

#define __SOF_MATH_IIR_DF2T_H__

#include <stddef.h>

#include <stdint.h>

/* Define SOFM_IIR_DF2T_FORCEARCH 0/3 in build command line or temporarily in

* this file to override the default auto detection.

*/

#ifdef SOFM_IIR_DF2T_FORCEARCH

# if SOFM_IIR_DF2T_FORCEARCH == 3

# define IIR_GENERIC 0

# define IIR_HIFI3 1

# elif SOFM_IIR_DF2T_FORCEARCH == 0

# define IIR_GENERIC 1

# define IIR_HIFI3 0

# else

# error "Unsupported SOFM_IIR_DF2T_FORCEARCH value."

# endif

#else

# if defined __XCC__

# include <xtensa/config/core-isa.h>

# if XCHAL_HAVE_HIFI3 == 1 || XCHAL_HAVE_HIFI4 == 1

# define IIR_GENERIC 0

# define IIR_HIFI3 1

# else

# define IIR_GENERIC 1

# define IIR_HIFI3 0

# endif /* XCHAL_HAVE_HIFIn */

# else

# define IIR_GENERIC 1

# define IIR_HIFI3 0

# endif /* __XCC__ */

#endif /* SOFM_IIR_DF2T_FORCEARCH */

#define IIR_DF2T_NUM_DELAYS 2

struct iir_state_df2t {

unsigned int biquads; /* Number of IIR 2nd order sections total */

unsigned int biquads_in_series; /* Number of IIR 2nd order sections

* in series.

*/

int32_t *coef; /* Pointer to IIR coefficients */

int64_t *delay; /* Pointer to IIR delay line */

};

struct sof_eq_iir_header;

int iir_init_coef_df2t(struct iir_state_df2t *iir,

struct sof_eq_iir_header *config);

int iir_delay_size_df2t(struct sof_eq_iir_header *config);

void iir_init_delay_df2t(struct iir_state_df2t *iir, int64_t **delay);

void iir_mute_df2t(struct iir_state_df2t *iir);

void iir_unmute_df2t(struct iir_state_df2t *iir);

void iir_reset_df2t(struct iir_state_df2t *iir);

int32_t iir_df2t(struct iir_state_df2t *iir, int32_t x);

/* Inline functions with or without HiFi3 intrinsics */

#if IIR_HIFI3

#include "iir_df2t_hifi3.h"

#else

#include "iir_df2t_generic.h"

#endif

#endif /* __SOF_MATH_IIR_DF2T_H__ */