int CR_RegisterEventCallback (int nDetrIdx, ICallback∗ pCallback ) ; class CCallbackImp : public ICallback { public: virtual void Process (int nEventID, CR Event∗ pEvent); void SetFrmBuf(char∗ pFrmBuf); void SetFrmHeaderLen(int nLen); private : int m nFrmHeaderLen; // In bytes char∗ m pFrmBuf; }; void CCallbackImp::Process(int nEventID, CR Event∗ pEvent) { if (CR EVT NEW FRAME == nEventID) { int nFrmIdxInBuf = ∗(int∗)pEvent−>pData; int nFrmSize = m nFrmHeaderLen + pEvent−>nPixelDepth ∗ pEvent−>nWidth ∗ pEvent−>nHeight / 8; if (m pFrmBuf != NULL) { char∗ pCurrFrm = (char∗)m pFrmBuf + nFrmIdxInBuf ∗ nFrmSize; memcpy(pDst, pCurrFrm, nFrmSize); } } } void CCallbackImp::SetFrmBuf(char∗ pFrmBuf) { m pFrmBuf = pFrmBuf; } void CCallbackImp::SetFrmHeaderLen(int nLen) { m nFrmHeaderLen = nLen; } enum CR_EventID { CR EVT SERVER DISCONNECTED, // dropped connection with server CR EVT DETR DISCONNECTED, // dropped connection with detector CR EVT TEMPERATURE INFO, // temperature of the detector CR EVT NEW FRAME, // Arrival of a new frame CR EVT CALIBRATION IN PROGRESS, // Calibration in progress CR EVT CALIBRATION FINISHED, // Completion of calibration CR EVT ACQ STAT INFO // Acquisition of statistical summary }; struct CR_Event { int nDetrIdx; int nWidth; // Same as CR ModeInfo.nImageWidth, see A.4 int nHeight; int nPixelDepth; void∗ pData; }; struct CR_AcquisitionStatInfo { int nTotalFrameNum; // Total number of frames acquired int nLostFrameNum; // Number of lost frames float fStatFrameRate; float fTransmissionSpeed; long long nAcqDuration; // Duration of image acquisition } Python作为def调用 CCallbackImp∗ pCallback = new CCallbackImp(); CR RegisterEventCallback(cDETR IDX, pCallback);
时间: 2024-04-15 10:30:18 浏览: 33
在Python中调用C++函数可以使用ctypes库。首先,需要将C++代码编译为动态链接库(.dll或.so文件),然后在Python中加载该动态链接库并调用函数。
下面是一个示例的Python代码,演示如何调用CR_RegisterEventCallback函数和创建CCallbackImp对象:
```python
import ctypes
# 加载动态链接库
lib = ctypes.CDLL('your_library_path')
# 定义CR_Event结构体
class CR_Event(ctypes.Structure):
_fields_ = [
('nDetrIdx', ctypes.c_int),
('nWidth', ctypes.c_int),
('nHeight', ctypes.c_int),
('nPixelDepth', ctypes.c_int),
('pData', ctypes.c_void_p)
]
# 定义CR_AcquisitionStatInfo结构体
class CR_AcquisitionStatInfo(ctypes.Structure):
_fields_ = [
('nTotalFrameNum', ctypes.c_int),
('nLostFrameNum', ctypes.c_int),
('fStatFrameRate', ctypes.c_float),
('fTransmissionSpeed', ctypes.c_float),
('nAcqDuration', ctypes.c_longlong)
]
# 定义ICallback接口
class ICallback(ctypes.Structure):
pass
# 定义CCallbackImp类
class CCallbackImp(ctypes.Structure):
_fields_ = [
('base', ICallback),
('m_nFrmHeaderLen', ctypes.c_int),
('m_pFrmBuf', ctypes.c_char_p)
]
# 定义CCallbackImp的Process方法
ProcessCallback = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.POINTER(CR_Event))
def Process(self, nEventID, pEvent):
if nEventID == CR_EventID.CR_EVT_NEW_FRAME:
nFrmIdxInBuf = ctypes.cast(pEvent.contents.pData, ctypes.POINTER(ctypes.c_int)).contents.value
nFrmSize = self.m_nFrmHeaderLen + pEvent.contents.nPixelDepth * pEvent.contents.nWidth * pEvent.contents.nHeight // 8
if self.m_pFrmBuf is not None:
pCurrFrm = ctypes.cast(self.m_pFrmBuf, ctypes.POINTER(ctypes.c_char)) + nFrmIdxInBuf * nFrmSize
# 调用memcpy函数,这里需要根据你的具体情况进行修改
# ctypes.memcpy(pDst, pCurrFrm, nFrmSize)
# 设置Process方法的回调函数
CCallbackImp.Process = ProcessCallback(Process)
# 创建CCallbackImp对象
callback_imp = CCallbackImp()
callback_imp_ptr = ctypes.pointer(callback_imp)
# 调用CR_RegisterEventCallback函数
CR_RegisterEventCallback = lib.CR_RegisterEventCallback
CR_RegisterEventCallback.argtypes = [ctypes.c_int, ctypes.POINTER(ICallback)]
CR_RegisterEventCallback.restype = ctypes.c_int
CR_RegisterEventCallback(nDetrIdx, callback_imp_ptr)
```
请注意,上述示例代码中的一些部分需要根据你的具体情况进行修改,特别是涉及到具体内存操作的部分。此外,你还需要将`your_library_path`替换为实际的动态链接库路径。