dsps_sub_s8_ansi.c File Reference

#include "dsps_sub.h"

Include dependency graph for dsps_sub_s8_ansi.c:

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Functions
esp_err_t	dsps_sub_s8_ansi (const int8_t *input1, const int8_t *input2, int8_t *output, int len, int step1, int step2, int step_out, int shift)

Function Documentation

dsps_sub_s8_ansi()

esp_err_t dsps_sub_s8_ansi	(	const int8_t *	input1,
		const int8_t *	input2,
		int8_t *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out,
		int	shift )

Definition at line 9 of file dsps_sub_s8_ansi.c.

{
    if (NULL == input1) {
        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
    }
    if (NULL == input2) {
        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
    }
    if (NULL == output) {
        return ESP_ERR_DSP_PARAM_OUTOFRANGE;
    }
 
    for (int i = 0 ; i < len ; i++) {
        int32_t acc = (int32_t)input1[i * step1] - (int32_t)input2[i * step2];
        output[i * step_out] = acc >> shift;
    }
    return ESP_OK;
}

References ESP_ERR_DSP_PARAM_OUTOFRANGE, and ESP_OK.