Vector Offset

Adds a constant offset to each element of a vector. More...

Functions
DSP_FUNC_SCOPE void	zdsp_offset_f32 (const DSP_DATA float32_t *src, float32_t offset, DSP_DATA float32_t *dst, uint32_t block_size)
	Adds a constant offset to a floating-point vector.
DSP_FUNC_SCOPE void	zdsp_offset_q7 (const DSP_DATA q7_t *src, q7_t offset, DSP_DATA q7_t *dst, uint32_t block_size)
	Adds a constant offset to a Q7 vector.
DSP_FUNC_SCOPE void	zdsp_offset_q15 (const DSP_DATA q15_t *src, q15_t offset, DSP_DATA q15_t *dst, uint32_t block_size)
	Adds a constant offset to a Q15 vector.
DSP_FUNC_SCOPE void	zdsp_offset_q31 (const DSP_DATA q31_t *src, q31_t offset, DSP_DATA q31_t *dst, uint32_t block_size)
	Adds a constant offset to a Q31 vector.
void	zdsp_offset_f16 (const float16_t *src, float16_t offset, float16_t *dst, uint32_t block_size)
	Adds a constant offset to a floating-point vector.

Detailed Description

Adds a constant offset to each element of a vector.

    dst[n] = src[n] + offset,   0 <= n < block_size.

The functions support in-place computation allowing the source and destination pointers to reference the same memory buffer. There are separate functions for floating-point, Q7, Q15, and Q31 data types.

Function Documentation

zdsp_offset_f16()

void zdsp_offset_f16	(	const float16_t *	src,
		float16_t	offset,
		float16_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath_f16.h>

Adds a constant offset to a floating-point vector.

Parameters

[in]	src	points to the input vector
[in]	offset	is the offset to be added
[out]	dst	points to the output vector
[in]	block_size	number of samples in the vector

zdsp_offset_f32()

DSP_FUNC_SCOPE void zdsp_offset_f32	(	const DSP_DATA float32_t *	src,
		float32_t	offset,
		DSP_DATA float32_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Adds a constant offset to a floating-point vector.

Parameters

[in]	src	points to the input vector
[in]	offset	is the offset to be added
[out]	dst	points to the output vector
[in]	block_size	number of samples in the vector

zdsp_offset_q15()

DSP_FUNC_SCOPE void zdsp_offset_q15	(	const DSP_DATA q15_t *	src,
		q15_t	offset,
		DSP_DATA q15_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Adds a constant offset to a Q15 vector.

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q15 range [0x8000 0x7FFF] are saturated.

Parameters

[in]	src	points to the input vector
[in]	offset	is the offset to be added
[out]	dst	points to the output vector
[in]	block_size	number of samples in the vector

zdsp_offset_q31()

DSP_FUNC_SCOPE void zdsp_offset_q31	(	const DSP_DATA q31_t *	src,
		q31_t	offset,
		DSP_DATA q31_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Adds a constant offset to a Q31 vector.

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q31 range [0x80000000 0x7FFFFFFF] are saturated.

Parameters

[in]	src	points to the input vector
[in]	offset	is the offset to be added
[out]	dst	points to the output vector
[in]	block_size	number of samples in the vector

zdsp_offset_q7()

DSP_FUNC_SCOPE void zdsp_offset_q7	(	const DSP_DATA q7_t *	src,
		q7_t	offset,
		DSP_DATA q7_t *	dst,
		uint32_t	block_size )

#include <zephyr/dsp/basicmath.h>

Adds a constant offset to a Q7 vector.

Scaling and Overflow Behavior

The function uses saturating arithmetic. Results outside of the allowable Q7 range [0x80 0x7F] are saturated.

Parameters

[in]	src	points to the input vector
[in]	offset	is the offset to be added
[out]	dst	points to the output vector
[in]	block_size	number of samples in the vector