这篇文章我们将总结一下,之前两篇文章中提到的Kinect SDK的函数接。
函数接口:
NuiGetSensorCount: 获取连接的Kinect设备个数
原型:_Check_return_ HRESULT NUIAPI NuiGetSensorCount( _In_ int * pCount );
解释:KinectSDK支持多个Kinect设备连接,这个函数能获取到Kinect设备个数。
返回值:返回S_OK是成功,其他失败,其中E_POINTER表示pCount是空指针错误。
NuiCreateSensorByIndex:通过索引创建INuiSensor对象
原型:_Check_return_ HRESULT NUIAPI NuiCreateSensorByIndex( _In_ int index, _Out_ INuiSensor ** ppNuiSensor );
解释:通过指定的下标,获取对应的KinectSensor对象
返回值:返回S_OK是成功,其他失败,错误码有:E_INVALIDARG(index是负数),E_NUI_BADINDEX(index超出范围),E_POINTER(ppNuiSensor是空指针)
NuiStatus:获取Kinect设备状态,它是INuiSensor的成员函数
原型:virtual HRESULT STDMETHODCALLTYPE NuiStatus( void) = 0;
解释:当获取到INuiSensor对象时,应该调用这个函数查看Kinect设备状态,如果状态不对,也是不能使用的。
返回值:返回S_OK是正常,其他失败,错误码如下:
S_NUI_INITIALIZING | The device is connected, but still initializing.设备初始化中 |
E_NUI_NOTCONNECTED | The device is not connected.设备未连接 |
E_NUI_NOTGENUINE | The device is not a valid Kinect.不是一个正常的Kinect |
E_NUI_NOTSUPPORTED | The device is an unsupported model.模式不支持 |
E_NUI_INSUFFICIENTBANDWIDTH | The device is connected to a hub without the necessary bandwidth requirements.插到usb hub中产生的问题 |
E_NUI_NOTPOWERED | The device is connected, but unpowered.没插电 |
E_NUI_NOTREADY | There was some other unspecified error.未知错误 |
NuiInitialize:初始化Kinect设备
原型:virtual HRESULT STDMETHODCALLTYPE NuiInitialize(
/* [in] */ DWORD dwFlags) = 0;
参数:指定初始化模式
Constant | Description |
---|---|
NUI_INITIALIZE_DEFAULT_HARDWARE_THREAD | This flag was deprecated in version 1.5; it is no longer used. |
NUI_INITIALIZE_FLAG_USES_AUDIO | Initialize the sensor to provide audio data. |
NUI_INITIALIZE_FLAG_USES_COLOR | Initialize the sensor to provide color data. |
NUI_INITIALIZE_FLAG_USES_DEPTH | Initialize the sensor to provide depth data. |
NUI_INITIALIZE_FLAG_USES_DEPTH_AND_PLAYER_INDEX | Initialize the sensor to provide depth data with a player index. |
NUI_INITIALIZE_FLAG_USES_SKELETON | Initialize the sensor to provide skeleton data. |
解释:一个设备只有第一次调用这个函数时候会成功,其他应用程序再调用这个函数会失败,也就是说一个设备只能给一个程序用。
返回值:S_OK成功,其他失败
NuiImageStreamOpen:打开Kinect流
原型: virtual HRESULT STDMETHODCALLTYPE NuiImageStreamOpen(
/* [in] */ NUI_IMAGE_TYPE eImageType, // 类型
/* [in] */ NUI_IMAGE_RESOLUTION eResolution, // 分辨率
/* [in] */ DWORD dwImageFrameFlags, // 帧事件选项
/* [in] */ DWORD dwFrameLimit, // kinect缓存的帧数量
/* [in] */ HANDLE hNextFrameEvent, // 手动reset的event,当下一帧数据到来时,kinect会reset它
/* [out] */ HANDLE *phStreamHandle) = 0; // 数据流句柄
返回值:S_OK表示成功,其他失败
Error | Description |
---|---|
E_FAIL | An unspecified error occurred. |
E_INVALIDARG | The value of the dwFlags parameter is NULL. |
E_NUI_DEVICE_NOT_READY | Kinect has not been initialized. |
E_OUTOFMEMORY | The allocation failed. |
E_POINTER | The hNextFrameEvent parameter is an invalid handle. |
NuiImageStreamGetNextFrame:取一帧数据
原型:virtual HRESULT STDMETHODCALLTYPE NuiImageStreamGetNextFrame(
/* [in] */ HANDLE hStream, // 数据流
/* [in] */ DWORD dwMillisecondsToWait, // 等待时间
/* [retval][out] */ NUI_IMAGE_FRAME *pImageFrame) = 0; // 保存数据的指针
返回值:S_OK成功,其他失败
Error | Description |
---|---|
S_FALSE | The waiting timeout expired before a frame was available and hStream was opened using the NUI_IMAGE_STREAM_FLAG_SUPPRESS_NO_FRAME_DATA flag. |
E_INVALIDARG | The value of the hStream parameter is NULL. |
E_NUI_FRAME_NO_DATA | The waiting timeout expired before a frame was available. |
E_POINTER | The value of the pImageFrame parameter is NULL. |
NuiImageFrameGetDepthImagePixelFrameTexture:将深度图转化成纹理
原型:virtual HRESULT STDMETHODCALLTYPE NuiImageFrameGetDepthImagePixelFrameTexture(
/* [in] */ HANDLE hStream, // 数据流
/* [in] */ NUI_IMAGE_FRAME *pImageFrame, // 帧数据
/* [out] */ BOOL *pNearMode, // 近模式,如果kinect离物体比较近,一般就会选择近模式
/* [out] */ INuiFrameTexture **ppFrameTexture) = 0; // 输出参数,转换后的纹理
返回值:S_OK成功,其他失败
LockRect:锁住矩形区域数据,让Kinect不要修改那些数据
原型:virtual HRESULT STDMETHODCALLTYPE LockRect(
UINT Level, // 必须为0
NUI_LOCKED_RECT* pLockedRect, // 传出参数,记录矩形
RECT* pRect, // 该参数暂时不用
DWORD flags) = 0; // 该参数暂时不用
返回值:S_OK成功,其他失败
Error | Description |
---|---|
E_INVALIDARG | The Level parameter is not zero. |
E_OUTOFMEMORY | The texture buffer could not be allocated. |
E_POINTER | The pLockedRect parameter is NULL or the texture has zero height. |
UnlockRect:解锁
原型:HRESULT UnlockRect(UINT level); // Level参数必须为0
返回值:S_OK成功,其他失败,可能的错误码为E_INVALIDARG(level参数不为0)
Error | Description |
---|---|
S_FALSE | The waiting timeout expired before a frame was available and hStream was opened using the NUI_IMAGE_STREAM_FLAG_SUPPRESS_NO_FRAME_DATA flag. |
E_INVALIDARG | The value of the hStream parameter is NULL. |
E_NUI_FRAME_NO_DATA | The waiting timeout expired before a frame was available. |
E_POINTER | The value of the pImageFrame parameter is NULL. |