ThresholdAbs
对向量中所有元素的绝对值做设阈操作。比较操作由接口函数名指定，包括：
函数接口声明如下：
- 整型数的操作：
HmppResult HMPPS_Threshold_LTAbs_16s(const int16_t* src, int16_t* dst, int32_t len, int16_t level);
HmppResult HMPPS_Threshold_LTAbs_32s(const int32_t* src, int32_t* dst, int32_t len, int32_t level);
HmppResult HMPPS_Threshold_GTAbs_16s(const int16_t* src, int16_t* dst, int32_t len, int16_t level);
HmppResult HMPPS_Threshold_GTAbs_32s(const int32_t* src, int32_t* dst, int32_t len, int32_t level);
- 浮点数的操作：
HmppResult HMPPS_Threshold_LTAbs_32f(const float* src, float* dst, int32_t len, float level);
HmppResult HMPPS_Threshold_LTAbs_64f(const double* src, double* dst, int32_t len, double level);
HmppResult HMPPS_Threshold_GTAbs_32f(const float* src, float* dst, int32_t len, float level);
HmppResult HMPPS_Threshold_GTAbs_64f(const double* src, double* dst, int32_t len, double level);
- 整型数的原址操作：
HmppResult HMPPS_Threshold_LTAbs_16s_I(int16_t* srcDst, int32_t len, int16_t level);
HmppResult HMPPS_Threshold_LTAbs_32s_I(int32_t* srcDst, int32_t len, int32_t level);
HmppResult HMPPS_Threshold_GTAbs_16s_I(int16_t* srcDst, int32_t len, int16_t level);
HmppResult HMPPS_Threshold_GTAbs_32s_I(int32_t* srcDst, int32_t len, int32_t level);
- 浮点数的原址操作：
HmppResult HMPPS_Threshold_LTAbs_32f_I(float* srcDst, int32_t len, float level);
HmppResult HMPPS_Threshold_LTAbs_64f_I(double* srcDst, int32_t len, double level);
HmppResult HMPPS_Threshold_GTAbs_32f_I(float* srcDst, int32_t len, float level);
HmppResult HMPPS_Threshold_GTAbs_64f_I(double* srcDst, int32_t len, double level)
参数
参数名 |
描述 |
取值范围 |
输入/输出 |
|---|---|---|---|
src |
指向源向量的指针。 |
非空 |
输入 |
dst |
指向目的向量的指针。 |
非空 |
输出 |
srcDst |
指向原址操作向量的指针。 |
非空 |
输入/输出 |
len |
向量长度。 |
(0, INT_MAX] |
输入 |
level |
阈值。 |
不限，视类型而定 |
输入 |
返回值
- 成功：返回HMPP_STS_NO_ERR。
- 失败：返回错误码。
错误码
错误码 |
描述 |
|---|---|
HMPP_STS_NULL_PTR_ERR |
src、dst、srcDst这几个入参中存在空指针。 |
HMPP_STS_SIZE_ERR |
len小于或等于0。 |
HMPP_STS_THRESH_NEG_LEVEL_ERR |
阈值小于0。 |
示例
#define BUFFER_SIZE_T 20
void ThresholdAbsExample(void)
{
float src[BUFFER_SIZE_T] = {1.46, 9.40, 10.73, 5.90, 5.74, -0.96, 8.55, -1.39, 1.71, 2.32, 9.99, 5.42, 10.58, 5.20, 9.12, 0.86, 10.13, 5.94, -0.62, 9.19};
float dst[BUFFER_SIZE_T] = {0.00};
HmppResult result;
int32_t i;
result = HMPPS_Threshold_LTAbs_32f(src, dst, BUFFER_SIZE_T, 3.14);
printf("Threshold1: result = %d.\ndst1 = ", result);
if (result != HMPP_STS_NO_ERR) {
return;
}
for (i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %.2f ", dst[i]);
}
HMPPS_Zero_32f(dst, BUFFER_SIZE_T);
result = HMPPS_Threshold_GTAbs_32f(src, dst, BUFFER_SIZE_T, 3.14);
if (result != HMPP_STS_NO_ERR) {
return;
}
printf("\nThreshold2: result = %d.\ndst2 = ", result);
for (i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %.2f ", dst[i]);
}
}
运行结果：
Threshold1: result = 0. dst1 = 3.14 9.40 10.73 5.90 5.74 -3.14 8.55 -3.14 3.14 3.14 9.99 5.42 10.58 5.20 9.12 3.14 10.13 5.94 -3.14 9.19 Threshold2: result = 0. dst2 = 1.46 3.14 3.14 3.14 3.14 -0.96 3.14 -1.39 1.71 2.32 3.14 3.14 3.14 3.14 3.14 0.86 3.14 3.14 -0.62 3.14