audio_scaled_sum_strided.c File Reference

#include "checked_float_buffer.h"

Go to the source code of this file.

Functions
int	audio_scaled_sum_strided_f32_checked (const float *left, size_t left_elements, size_t left_stride, const float *right, size_t right_elements, size_t right_stride, float *output, size_t output_elements, size_t output_stride, size_t rows, size_t columns, float scale)

Function Documentation

audio_scaled_sum_strided_f32_checked()

int audio_scaled_sum_strided_f32_checked	(	const float *	left,
		size_t	left_elements,
		size_t	left_stride,
		const float *	right,
		size_t	right_elements,
		size_t	right_stride,
		float *	output,
		size_t	output_elements,
		size_t	output_stride,
		size_t	rows,
		size_t	columns,
		float	scale
	)

Definition at line 7 of file audio_scaled_sum_strided.c.

{
    size_t nl, nr, no;
    if (!ck_checked_span(rows, columns, left_stride, &nl) ||
        !ck_checked_span(rows, columns, right_stride, &nr) ||
        !ck_checked_span(rows, columns, output_stride, &no) ||
        left_elements < nl || right_elements < nr || output_elements < no)
        return -2;
    if (!isfinite(scale) ||
        !ck_checked_region(left, nl) || !ck_checked_region(right, nr) ||
        !ck_checked_region(output, no) ||
        ck_checked_overlap(left, nl, output, no) ||
        ck_checked_overlap(right, nr, output, no))
        return -1;
    /* Preflight every element so failure never publishes a partial output. */
    for (size_t row = 0; row < rows; ++row) {
        for (size_t column = 0; column < columns; ++column) {
            const float a = left[row * left_stride + column];
            const float b = right[row * right_stride + column];
            const float sum = a + b;
            if (!isfinite(a) || !isfinite(b) || !isfinite(sum) ||
                !isfinite(sum * scale))
                return -3;
        }
    }
    for (size_t row = 0; row < rows; ++row)
        for (size_t column = 0; column < columns; ++column)
            output[row * output_stride + column] =
                (left[row * left_stride + column] +
                 right[row * right_stride + column]) * scale;
    return 0;
}

References ck_checked_overlap(), ck_checked_region(), ck_checked_span(), left, and right.