MaxAbsIndx

Obtains the maximum absolute value and its index in a vector.

The function interface declaration is as follows:

HmppResult HMPPS_MaxAbsIndx_16s(const int16_t *src int32_t len, int16_t *maxAbs, int32_t *indx);

HmppResult HMPPS_MaxAbsIndx_32s(const int32_t *src, int32_t len, int32_t *maxAbs, int32_t *indx);

Parameters

Parameter	Description	Value Range	Input/Output
src	Pointer to the source vector	The value cannot be NULL.	Input
len	Vector length	(0, INT_MAX]	Input
maxAbs	Pointer to the maximum absolute value	The value cannot be NULL.	Output
indx	Pointer to the index	The value cannot be NULL.	Output

Return Value

Success: HMPP_STS_NO_ERR
Failure: An error code is returned.

Error Codes

Error Code	Description
HMPP_STS_NULL_PTR_ERR	The value of src, maxAbs, or indx is NULL.
HMPP_STS_SIZE_ERR	The value of len is less than or equal to 0.

Example

#define BUFFER_SIZE_T 10

void MaxAbsIndxExample(void)
{
    int16_t src[BUFFER_SIZE_T] = {3, 0, 2, -8, 3, 15, 26, -31, 1, 23};
    int16_t maxAbs;
    int32_t maxIndex;

    HmppResult result = HMPPS_MaxAbsIndx_16s(src, BUFFER_SIZE_T, &maxAbs, &maxIndex);
    printf("result = %d\n", result);
    if (result != HMPP_STS_NO_ERR) {
        return;
    }
    printf("maxAbs = %d, index of maxAbs is %d\n", maxAbs, maxIndex);
}

Output:

result = 0
maxAbs = 31, index of maxAbs is 7

Parent topic: Basic and Common Calculations