dsps_sub.h File Reference

#include "dsp_err.h"
#include "dsps_sub_platform.h"

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Macros
#define	dsps_sub_f32   dsps_sub_f32_ansi
#define	dsps_sub_s16   dsps_sub_s16_ansi
#define	dsps_sub_s8   dsps_sub_s8_ansi

Functions
esp_err_t	dsps_sub_f32_ansi (const float *input1, const float *input2, float *output, int len, int step1, int step2, int step_out)
	sub arrays
esp_err_t	dsps_sub_f32_ae32 (const float *input1, const float *input2, float *output, int len, int step1, int step2, int step_out)
esp_err_t	dsps_sub_s16_ansi (const int16_t *input1, const int16_t *input2, int16_t *output, int len, int step1, int step2, int step_out, int shift)
esp_err_t	dsps_sub_s16_ae32 (const int16_t *input1, const int16_t *input2, int16_t *output, int len, int step1, int step2, int step_out, int shift)
esp_err_t	dsps_sub_s16_aes3 (const int16_t *input1, const int16_t *input2, int16_t *output, int len, int step1, int step2, int step_out, int shift)
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)
esp_err_t	dsps_sub_s8_aes3 (const int8_t *input1, const int8_t *input2, int8_t *output, int len, int step1, int step2, int step_out, int shift)

Macro Definition Documentation

dsps_sub_f32

#define dsps_sub_f32   dsps_sub_f32_ansi

Definition at line 82 of file dsps_sub.h.

Referenced by dspm::Mat::operator-=().

dsps_sub_s16

#define dsps_sub_s16   dsps_sub_s16_ansi

Definition at line 83 of file dsps_sub.h.

dsps_sub_s8

#define dsps_sub_s8   dsps_sub_s8_ansi

Definition at line 84 of file dsps_sub.h.

Function Documentation

dsps_sub_f32_ae32()

esp_err_t dsps_sub_f32_ae32	(	const float *	input1,
		const float *	input2,
		float *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out )

dsps_sub_f32_ansi()

esp_err_t dsps_sub_f32_ansi	(	const float *	input1,
		const float *	input2,
		float *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out )

sub arrays

The function subtract one array from another out[i*step_out] = input1[i*step1] - input2[i*step2]; i=[0..len) The implementation use ANSI C and could be compiled and run on any platform

Parameters

[in]	input1	input array 1
[in]	input2	input array 2
	output	output array
	len	amount of operations for arrays
	step1	step over input array 1 (by default should be 1)
	step2	step over input array 2 (by default should be 1)
	step_out	step over output array (by default should be 1)

Returns

• ESP_OK on success
• One of the error codes from DSP library

Definition at line 17 of file dsps_sub_f32_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++) {
        output[i * step_out] = input1[i * step1] - input2[i * step2];
    }
    return ESP_OK;
}

References ESP_ERR_DSP_PARAM_OUTOFRANGE, and ESP_OK.

dsps_sub_s16_ae32()

esp_err_t dsps_sub_s16_ae32	(	const int16_t *	input1,
		const int16_t *	input2,
		int16_t *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out,
		int	shift )

dsps_sub_s16_aes3()

esp_err_t dsps_sub_s16_aes3	(	const int16_t *	input1,
		const int16_t *	input2,
		int16_t *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out,
		int	shift )

dsps_sub_s16_ansi()

esp_err_t dsps_sub_s16_ansi	(	const int16_t *	input1,
		const int16_t *	input2,
		int16_t *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out,
		int	shift )

Definition at line 9 of file dsps_sub_s16_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.

dsps_sub_s8_aes3()

esp_err_t dsps_sub_s8_aes3	(	const int8_t *	input1,
		const int8_t *	input2,
		int8_t *	output,
		int	len,
		int	step1,
		int	step2,
		int	step_out,
		int	shift )

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.