WinHamming
Multiplies a vector by a Hamming window. The definition formula of Hamming window is as follows: 
.
The function interface declaration is as follows:
- Operations on integers:
HmppResult HMPPS_WinHamming_16s(const int16_t *src, int16_t *dst, int32_t len);
HmppResult HMPPS_WinHamming_16sc(const Hmpp16sc *src, Hmpp16sc *dst, int32_t len);
- Operations on floating-point numbers:
HmppResult HMPPS_WinHamming_32f(const float *src, float *dst, int32_t len);
HmppResult HMPPS_WinHamming_64f(const double *src, double *dst, int32_t len);
HmppResult HMPPS_WinHamming_32fc(const Hmpp32fc *src, Hmpp32fc *dst, int32_t len);
HmppResult HMPPS_WinHamming_64fc(const Hmpp64fc *src, Hmpp64fc *dst, int32_t len);
- In-place operations on integers:
HmppResult HMPPS_WinHamming_16s_I(int16_t *srcDst, int32_t len);
HmppResult HMPPS_WinHamming_16sc_I(Hmpp16sc *srcDst, int32_t len);
- In-place operations on floating-point numbers:
HmppResult HMPPS_WinHamming_32f_I(float *srcDst, int32_t len);
HmppResult HMPPS_WinHamming_64f_I(double *srcDst, int32_t len);
HmppResult HMPPS_WinHamming_32fc_I(Hmpp32fc *srcDst, int32_t len);
HmppResult HMPPS_WinHamming_64fc_I(Hmpp64fc *srcDst, int32_t len);
Parameters
Parameter |
Description |
Value Range |
Input/Output |
|---|---|---|---|
src |
Pointer to the source vector |
The value cannot be NULL. |
Input |
dst |
Pointer to the destination vector |
The value cannot be NULL. |
Output |
srcDst |
Pointer to the source vector for in-place operations |
The value cannot be NULL. |
Input/Output |
len |
Vector length |
[3, INT_MAX] |
Input |
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, dst, or srcDst is NULL. |
HMPP_STS_SIZE_ERR |
The value of len is less than 3. |
Example
#define BUFFER_SIZE_T 10
void WinHammingExample(void)
{
float src[BUFFER_SIZE_T] = {1.64, 1.63, -1.09, 0.71, -3.20, -0.43, 0.41, -4.83, 5.36, -4.40};
float dst[BUFFER_SIZE_T];
(void)HMPPS_Zero_32f(dst, BUFFER_SIZE_T); //Initialize all elements of dst to 0.
HmppResult result = HMPPS_WinHamming_32f(src, dst, BUFFER_SIZE_T);
printf("result = %d\n", result);
if (result != HMPP_STS_NO_ERR) {
return;
}
printf("dst =");
for (int i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %f", dst[i]);
}
printf("\n");
}
Output:
result = 0 dst = 0.131200 0.305820 -0.501533 0.546700 -3.111228 -0.418071 0.315700 -2.222389 1.005641 -0.352000