utils.h

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/*
 * Copyright (C) 2024 OWL Services LLC. All rights reserved.
 *
 * SPDX-License-Identifier: Apache-2.0
 */
 
#ifndef INCLUDE_ZEPHYR_DSP_UTILS_H_
#define INCLUDE_ZEPHYR_DSP_UTILS_H_
 
#include <stdint.h>
#include <zephyr/kernel.h>
#include <zephyr/dsp/dsp.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define Z_SHIFT_Q7_TO_F32(src, m) ((float32_t)(((src << m)) / (float32_t)(1U << 7)))
 
#define Z_SHIFT_Q15_TO_F32(src, m) ((float32_t)((src << m) / (float32_t)(1U << 15)))
 
#define Z_SHIFT_Q31_TO_F32(src, m) ((float32_t)(((int64_t)src) << m) / (float32_t)(1U << 31))
 
#define Z_SHIFT_Q7_TO_F64(src, m) (((float64_t)(src << m)) / (1U << 7))
 
#define Z_SHIFT_Q15_TO_F64(src, m) (((float64_t)(src << m)) / (1UL << 15))
 
#define Z_SHIFT_Q31_TO_F64(src, m) ((float64_t)(((int64_t)src) << m) / (1ULL << 31))
 
#define Z_SHIFT_F32_TO_Q7(src, m)                                                                  \
        ((q7_t)Z_CLAMP((int32_t)(src * (1U << 7)) >> m, INT8_MIN, INT8_MAX))
 
#define Z_SHIFT_F32_TO_Q15(src, m)                                                                 \
        ((q15_t)Z_CLAMP((int32_t)(src * (1U << 15)) >> m, INT16_MIN, INT16_MAX))
 
#define Z_SHIFT_F32_TO_Q31(src, m)                                                                 \
        ((q31_t)Z_CLAMP((int64_t)(src * (1U << 31)) >> m, INT32_MIN, INT32_MAX))
 
#define Z_SHIFT_F64_TO_Q7(src, m)                                                                  \
        ((q7_t)Z_CLAMP((int32_t)(src * (1U << 7)) >> m, INT8_MIN, INT8_MAX))
 
#define Z_SHIFT_F64_TO_Q15(src, m)                                                                 \
        ((q15_t)Z_CLAMP((int32_t)(src * (1U << 15)) >> m, INT16_MIN, INT16_MAX))
 
#define Z_SHIFT_F64_TO_Q31(src, m)                                                                 \
        ((q31_t)Z_CLAMP((int64_t)(src * (1U << 31)) >> m, INT32_MIN, INT32_MAX))
 
#ifdef __cplusplus
}
#endif
 
#endif /* INCLUDE_ZEPHYR_DSP_UTILS_H_ */