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

*

* Copyright(c) 2025 Intel Corporation.

*/

#ifndef __SOF_MATH_A_LAW_H__

#define __SOF_MATH_A_LAW_H__

#include <stdint.h>

/**

* sofm_a_law_encode() - Encode sample with A-law coding

* @param sample: A s16 sample value

*

* The A-law codec is defined in ITU-T G.711 standard and has been used

* in telecommunications in e.g. Europe. The A-law coding compresses 13 bit

* samples to 8 bit data stream. In SOF the high 13 bits of s16 format are

* used for compatibility with normal audios.

*

* @return: Compressed 8 bit code value

*/

uint8_t sofm_a_law_encode(int16_t sample);

/**

* sofm_a_law_decode() - Decode A-law encoded code word

* @param byte: Encoded code word

*

* The A-law decoder expands a 8 bit code word into a 13 bit sample value.

* In the SOF the high 13 bits are aligned to the most significant bits

* to be compatible with normal s16 Q1.15 samples.

*

* @return: Sample value in s16 format

*/

int16_t sofm_a_law_decode(int8_t byte);

#endif /* __SOF_MATH_A_LAW_H__ */