---
title: WinBlackman
description: "给指定向量加blackman窗，其公式为："
url: https://www.hikunpeng.com/document/detail/zh/kunpengboostkithistory/240RC1/accel/kunpengaccel_hmpp_06_0136.html
sourcePath: /source/zh/kunpengboostkithistory/240RC1/accel/kunpengaccel_hmpp_06_0136.html
indexId: 5d3934919f3c27aaebe58a668af0ac8d1770868c45a26cd1fc0fc98fb862dde577
---
# WinBlackman

给指定向量加blackman窗，其公式为：


其中，

- WinBlackman类接口，其alpha值由接口参数传入。
- WinBlackmanStd类接口，其alpha=-0.16。
- WinBlackmanOpt类接口，其alpha计算公式为：

函数接口声明如下：

- 数据的常规操作：
  HmppResult HMPPS_WinBlackman_16s(const int16_t* src, int16_t* dst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_32f(const float* src, float* dst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_64f(const double* src, double* dst, int32_t len, double alpha);

  HmppResult HMPPS_WinBlackman_16sc(const Hmpp16sc* src, Hmpp16sc* dst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_32fc(const Hmpp32fc* src, Hmpp32fc* dst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_64fc(const Hmpp64fc* src, Hmpp64fc* dst, int32_t len, double alpha);

  HmppResult HMPPS_WinBlackmanStd_16s(const int16_t* src, int16_t* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_32f(const float* src, float* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_64f(const double* src, double* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_16sc(const Hmpp16sc* src, Hmpp16sc* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_32fc(const Hmpp32fc* src, Hmpp32fc* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_64fc(const Hmpp64fc* src, Hmpp64fc* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_16s(const int16_t* src, int16_t* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_32f(const float* src, float* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_64f(const double* src, double* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_16sc(const Hmpp16sc* src, Hmpp16sc* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_32fc(const Hmpp32fc* src, Hmpp32fc* dst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_64fc(const Hmpp64fc* src, Hmpp64fc* dst, int32_t len);

- 数据的原址操作：
  HmppResult HMPPS_WinBlackman_16s_I(int16_t* srcDst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_32f_I(float* srcDst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_64f_I(double* srcDst, int32_t len, double alpha);

  HmppResult HMPPS_WinBlackman_16sc_I(Hmpp16sc* srcDst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_32fc_I(Hmpp32fc* srcDst, int32_t len, float alpha);

  HmppResult HMPPS_WinBlackman_64fc_I(Hmpp64fc* srcDst, int32_t len, double alpha);

  HmppResult HMPPS_WinBlackmanStd_16s_I(int16_t* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_32f_I(float* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_64f_I(double* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_16sc_I(Hmpp16sc* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_32fc_I(Hmpp32fc* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanStd_64fc_I(Hmpp64fc* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_16s_I(int16_t* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_32f_I(float* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_64f_I(double* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_16sc_I(Hmpp16sc* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_32fc_I(Hmpp32fc* srcDst, int32_t len);

  HmppResult HMPPS_WinBlackmanOpt_64fc_I(Hmpp64fc* srcDst, int32_t len);


#### 参数

| 参数名 | 描述 | 取值范围 | 输入/输出 |
| --- | --- | --- | --- |
| dst | 指向目的向量的指针。 | 非空 | 输出 |
| len | 向量长度。 | (0,INT\_MAX] | 输入 |
| src | 指向源向量序列的指针。 | 非空 | 输入 |
| srcDst | 做原址操作时指向源和目的向量的指针。 | 非空 | 输入&输出 |
| alpha | WinBlackman相关的调整参数。 | 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入参中存在空指针。 |
| HMPP\_STS\_SIZE\_ERR | WinBlackmanOpt类型接口len小于4，其他类型接口len小于3。 |


#### 示例

```
#define BUFFER_SIZE_T 10
int WinBlackmanExample()
{
int32_t i;
float dst[BUFFER_SIZE_T] = {0.0};
float alpha = 2.3399999;
float src[BUFFER_SIZE_T] = {32.4324, 65.655998, -645.26532, 34534.34, 76547.547, 32.4324, -54353.234, -534.53448, 868.12323, 9.3542995};
HmppResult result = HMPPS_WinBlackman_32f(src, dst, BUFFER_SIZE_T, alpha);
printf("result = %d \ndst =", result);
for (i = 0; i < BUFFER_SIZE_T; i++) {
printf(" %f  ", dst[i]);
}
return 0;
}
```

运行结果：

```
result = 0
dst = 0.000000   71.158592   -1730.999023   86508.515625   95192.570312   40.332100   -136154.843750   -1433.950806   940.880188   0.000000
```