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

*

* Copyright(c) 2020 Google LLC. All rights reserved.

*

* Author: Pin-chih Lin <johnylin@google.com>

*/

#ifndef __USER_DRC_H__

#define __USER_DRC_H__

#include <stdint.h>

/* Maximum number allowed in configuration blob */

#define SOF_DRC_MAX_SIZE 1024

/* The parameters of the DRC compressor */

struct sof_drc_params {

/* 1 to enable DRC, 0 to disable it */

int32_t enabled;

/* The value above which the compression starts, in dB */

int32_t db_threshold; /* Q8.24 */

/* The value above which the knee region starts, in dB */

int32_t db_knee; /* Q8.24 */

/* The input/output dB ratio after the knee region */

int32_t ratio; /* Q8.24 */

/* The lookahead time for the compressor, in seconds */

int32_t pre_delay_time; /* Q2.30 */

/* The input to output change below the threshold is 1:1 */

int32_t linear_threshold; /* Q2.30 */

/* Inverse ratio */

int32_t slope; /* Q2.30 */

/* Internal parameter for the knee portion of the curve. */

int32_t K; /* Q12.20 */

/* Pre-calculated parameters */

int32_t knee_alpha; /* Q8.24 */

int32_t knee_beta; /* Q8.24 */

int32_t knee_threshold; /* Q8.24 */

int32_t ratio_base; /* Q2.30 */

int32_t master_linear_gain; /* Q8.24 */

int32_t one_over_attack_frames; /* Q2.30 */

int32_t sat_release_frames_inv_neg; /* Q2.30 */

int32_t sat_release_rate_at_neg_two_db; /* Q2.30 */

/* The release frames coefficients */

int32_t kSpacingDb; /* Q32.0 */

int32_t kA; /* Q20.12 */

int32_t kB; /* Q20.12 */

int32_t kC; /* Q20.12 */

int32_t kD; /* Q20.12 */

int32_t kE; /* Q20.12 */

} __attribute__((packed));

struct sof_drc_config {

uint32_t size;

/* reserved */

uint32_t reserved[4];

struct sof_drc_params params;

} __attribute__((packed));

#endif // __USER_DRC_H__