areaDetector  3-7-0
EPICS areaDetector framework
Public Member Functions | Public Attributes | List of all members
NDPluginFile Class Referenceabstract

Base class for NDArray file writing plugins; actual file writing plugins inherit from this class. More...

#include <NDPluginFile.h>

Inheritance diagram for NDPluginFile:
NDPluginDriver asynNDArrayDriver ffmpegFile NDFileHDF5 NDFileJPEG NDFileMagick NDFileNetCDF NDFileNexus NDFileNull NDFileTIFF pcoEdgePlugin

Public Member Functions

 NDPluginFile (const char *portName, int queueSize, int blockingCallbacks, const char *NDArrayPort, int NDArrayAddr, int maxAddr, int maxBuffers, size_t maxMemory, int interfaceMask, int interruptMask, int asynFlags, int autoConnect, int priority, int stackSize, int maxThreads, bool compressionAware=false)
 Constructor for NDPluginFile; all parameters are simply passed to NDPluginDriver::NDPluginDriver. More...
 
virtual void processCallbacks (NDArray *pArray)
 Callback function that is called by the NDArray driver with new NDArray data. More...
 
virtual asynStatus writeInt32 (asynUser *pasynUser, epicsInt32 value)
 Called when asyn clients call pasynInt32->write(). More...
 
virtual asynStatus writeNDArray (asynUser *pasynUser, void *genericPointer)
 
virtual asynStatus openFile (const char *fileName, NDFileOpenMode_t openMode, NDArray *pArray)=0
 Open a file; pure virtual function that must be implemented by derived classes. More...
 
virtual asynStatus readFile (NDArray **pArray)=0
 Read NDArray data from a file; pure virtual function that must be implemented by derived classes. More...
 
virtual asynStatus writeFile (NDArray *pArray)=0
 Write NDArray data to a file; pure virtual function that must be implemented by derived classes. More...
 
virtual asynStatus closeFile ()=0
 Close the file opened with NDPluginFile::openFile; pure virtual function that must be implemented by derived classes. More...
 
- Public Member Functions inherited from NDPluginDriver
 NDPluginDriver (const char *portName, int queueSize, int blockingCallbacks, const char *NDArrayPort, int NDArrayAddr, int maxAddr, int maxBuffers, size_t maxMemory, int interfaceMask, int interruptMask, int asynFlags, int autoConnect, int priority, int stackSize, int maxThreads, bool compressionAware=false)
 Constructor for NDPluginDriver; most parameters are simply passed to asynNDArrayDriver::asynNDArrayDriver. More...
 
 ~NDPluginDriver ()
 
virtual asynStatus writeFloat64 (asynUser *pasynUser, epicsFloat64 value)
 Called when asyn clients call pasynFloat64->write(). More...
 
virtual asynStatus writeOctet (asynUser *pasynUser, const char *value, size_t maxChars, size_t *nActual)
 Called when asyn clients call pasynOctet->write(). More...
 
virtual asynStatus readInt32Array (asynUser *pasynUser, epicsInt32 *value, size_t nElements, size_t *nIn)
 Called when asyn clients call pasynInt32Array->read(). More...
 
virtual void driverCallback (asynUser *pasynUser, void *genericPointer)
 Method that is called from the driver with a new NDArray. More...
 
virtual void run (void)
 Starts the thread that receives NDArrays from the epicsMessageQueue. More...
 
virtual asynStatus start (void)
 Starts the plugin threads. More...
 
void sortingTask ()
 Method runs as a separate thread, periodically doing NDArray callbacks to downstream plugins. More...
 
- Public Member Functions inherited from asynNDArrayDriver
 asynNDArrayDriver (const char *portName, int maxAddr, int maxBuffers, size_t maxMemory, int interfaceMask, int interruptMask, int asynFlags, int autoConnect, int priority, int stackSize)
 This is the constructor for the asynNDArrayDriver class. More...
 
virtual ~asynNDArrayDriver ()
 
virtual asynStatus readGenericPointer (asynUser *pasynUser, void *genericPointer)
 This method copies an NDArray object from the asynNDArrayDriver to an NDArray pointer passed in by the caller. More...
 
virtual asynStatus writeGenericPointer (asynUser *pasynUser, void *genericPointer)
 This method currently does nothing, but it should be implemented in this base class. More...
 
virtual asynStatus readInt32 (asynUser *pasynUser, epicsInt32 *value)
 
virtual asynStatus readFloat64 (asynUser *pasynUser, epicsFloat64 *value)
 
virtual void report (FILE *fp, int details)
 Report status of the driver. More...
 
virtual asynStatus createFilePath (const char *path, int pathDepth)
 Function to create a directory path for a file. More...
 
virtual asynStatus checkPath ()
 Checks whether the directory specified NDFilePath parameter exists. More...
 
virtual bool checkPath (std::string &filePath)
 Checks whether the directory specified exists. More...
 
virtual asynStatus createFileName (int maxChars, char *fullFileName)
 Build a file name from component parts. More...
 
virtual asynStatus createFileName (int maxChars, char *filePath, char *fileName)
 Build a file name from component parts. More...
 
virtual asynStatus readNDAttributesFile ()
 Create this driver's NDAttributeList (pAttributeList) by reading an XML file This clears any existing attributes from this drivers' NDAttributeList and then creates a new list based on the XML file. More...
 
virtual asynStatus getAttributes (NDAttributeList *pAttributeList)
 Get the current values of attributes from this driver and appends them to an output attribute list. More...
 
asynStatus incrementQueuedArrayCount ()
 
asynStatus decrementQueuedArrayCount ()
 
int getQueuedArrayCount ()
 
void updateQueuedArrayCount ()
 

Public Attributes

int supportsMultipleArrays
 Derived classes must set this flag to 0/1 if they cannot/can write multiple NDArrays to a single file. More...
 
- Public Attributes inherited from asynNDArrayDriver
class NDArrayPoolpNDArrayPool
 An NDArrayPool pointer that is initialized to pNDArrayPoolPvt_ in the constructor. More...
 

Additional Inherited Members

- Protected Member Functions inherited from NDPluginDriver
virtual void beginProcessCallbacks (NDArray *pArray)
 Method that is normally called at the beginning of the processCallbacks method in derived classes. More...
 
virtual asynStatus endProcessCallbacks (NDArray *pArray, bool copyArray=false, bool readAttributes=true)
 Method that is normally called at the end of the processCallbacks()) method in derived classes. More...
 
virtual asynStatus connectToArrayPort (void)
 Connect this plugin to an NDArray port driver; disconnect from any existing driver first, register for callbacks if enabled. More...
 
virtual asynStatus setArrayInterrupt (int connect)
 Register or unregister to receive asynGenericPointer (NDArray) callbacks from the driver. More...
 
bool throttled (NDArray *pArray)
 
- Protected Attributes inherited from NDPluginDriver
int NDPluginDriverArrayPort
 
int NDPluginDriverArrayAddr
 
int NDPluginDriverPluginType
 
int NDPluginDriverDroppedArrays
 
int NDPluginDriverQueueSize
 
int NDPluginDriverQueueFree
 
int NDPluginDriverMaxThreads
 
int NDPluginDriverNumThreads
 
int NDPluginDriverSortMode
 
int NDPluginDriverSortTime
 
int NDPluginDriverSortSize
 
int NDPluginDriverSortFree
 
int NDPluginDriverDisorderedArrays
 
int NDPluginDriverDroppedOutputArrays
 
int NDPluginDriverEnableCallbacks
 
int NDPluginDriverBlockingCallbacks
 
int NDPluginDriverProcessPlugin
 
int NDPluginDriverExecutionTime
 
int NDPluginDriverMinCallbackTime
 
int NDPluginDriverMaxByteRate
 
NDArraypPrevInputArray_
 
- Protected Attributes inherited from asynNDArrayDriver
int NDPortNameSelf
 
int NDADCoreVersion
 
int NDDriverVersion
 
int NDArraySizeX
 
int NDArraySizeY
 
int NDArraySizeZ
 
int NDArraySize
 
int NDNDimensions
 
int NDDimensions
 
int NDDataType
 
int NDColorMode
 
int NDUniqueId
 
int NDTimeStamp
 
int NDEpicsTSSec
 
int NDEpicsTSNsec
 
int NDBayerPattern
 
int NDCodec
 
int NDCompressedSize
 
int NDArrayCounter
 
int NDFilePath
 
int NDFilePathExists
 
int NDFileName
 
int NDFileNumber
 
int NDFileTemplate
 
int NDAutoIncrement
 
int NDFullFileName
 
int NDFileFormat
 
int NDAutoSave
 
int NDWriteFile
 
int NDReadFile
 
int NDFileWriteMode
 
int NDFileWriteStatus
 
int NDFileWriteMessage
 
int NDFileNumCapture
 
int NDFileNumCaptured
 
int NDFileCapture
 
int NDFileDeleteDriverFile
 
int NDFileLazyOpen
 
int NDFileCreateDir
 
int NDFileTempSuffix
 
int NDAttributesFile
 
int NDAttributesStatus
 
int NDAttributesMacros
 
int NDArrayData
 
int NDArrayCallbacks
 
int NDPoolMaxBuffers
 
int NDPoolAllocBuffers
 
int NDPoolFreeBuffers
 
int NDPoolMaxMemory
 
int NDPoolUsedMemory
 
int NDPoolEmptyFreeList
 
int NDNumQueuedArrays
 
class NDArray ** pArrays
 An array of NDArray pointers used to store data in the driver. More...
 
class NDAttributeListpAttributeList
 An NDAttributeList object used to obtain the current values of a set of attributes. More...
 
int threadStackSize_
 
int threadPriority_
 

Detailed Description

Base class for NDArray file writing plugins; actual file writing plugins inherit from this class.

This class handles the logic of single file per image, capture into buffer or streaming multiple images to a single file.

Derived classes must implement the 4 pure virtual functions: openFile, readFile, writeFile and closeFile.

Constructor & Destructor Documentation

◆ NDPluginFile()

NDPluginFile::NDPluginFile ( const char *  portName,
int  queueSize,
int  blockingCallbacks,
const char *  NDArrayPort,
int  NDArrayAddr,
int  maxAddr,
int  maxBuffers,
size_t  maxMemory,
int  interfaceMask,
int  interruptMask,
int  asynFlags,
int  autoConnect,
int  priority,
int  stackSize,
int  maxThreads,
bool  compressionAware = false 
)

Constructor for NDPluginFile; all parameters are simply passed to NDPluginDriver::NDPluginDriver.

Parameters
[in]portNameThe name of the asyn port driver to be created.
[in]queueSizeThe number of NDArrays that the input queue for this plugin can hold when NDPluginDriverBlockingCallbacks=0. Larger queues can decrease the number of dropped arrays, at the expense of more NDArray buffers being allocated from the underlying driver's NDArrayPool.
[in]blockingCallbacksInitial setting for the NDPluginDriverBlockingCallbacks flag. 0=callbacks are queued and executed by the callback thread; 1 callbacks execute in the thread of the driver doing the callbacks.
[in]NDArrayPortName of asyn port driver for initial source of NDArray callbacks.
[in]NDArrayAddrasyn port driver address for initial source of NDArray callbacks.
[in]maxAddrThe maximum number of asyn addr addresses this driver supports. 1 is minimum.
[in]maxBuffersThe maximum number of NDArray buffers that the NDArrayPool for this driver is allowed to allocate. Set this to 0 to allow an unlimited number of buffers.
[in]maxMemoryThe maximum amount of memory that the NDArrayPool for this driver is allowed to allocate. Set this to 0 to allow an unlimited amount of memory.
[in]interfaceMaskBit mask defining the asyn interfaces that this driver supports.
[in]interruptMaskBit mask definining the asyn interfaces that can generate interrupts (callbacks)
[in]asynFlagsFlags when creating the asyn port driver; includes ASYN_CANBLOCK and ASYN_MULTIDEVICE.
[in]autoConnectThe autoConnect flag for the asyn port driver.
[in]priorityThe thread priority for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
[in]stackSizeThe stack size for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
[in]maxThreadsThe maximum number of threads this driver is allowed to use. If 0 then 1 will be used.
[in]compressionAwaretrue if this file plugin can handle compressed NDArrays.

Member Function Documentation

◆ closeFile()

virtual asynStatus NDPluginFile::closeFile ( )
pure virtual

Close the file opened with NDPluginFile::openFile; pure virtual function that must be implemented by derived classes.

Implemented in NDFileHDF5, NDFileJPEG, NDFileNexus, NDFileNetCDF, NDFileTIFF, NDFileMagick, ffmpegFile, NDFileNull, and pcoEdgePlugin.

◆ openFile()

virtual asynStatus NDPluginFile::openFile ( const char *  fileName,
NDFileOpenMode_t  openMode,
NDArray pArray 
)
pure virtual

Open a file; pure virtual function that must be implemented by derived classes.

Parameters
[in]fileNameAbsolute path name of the file to open.
[in]openModeBit mask with one of the access mode bits NDFileModeRead, NDFileModeWrite. NDFileModeAppend. May also have the bit NDFileModeMultiple set if the file is to be opened to write or read multiple NDArrays into a single file.
[in]pArrayPointer to an NDArray; this array does not contain data to be written or read.

Rather it can be used to determine the header information and data structure for the file. It is guaranteed that NDArrays pass to NDPluginFile::writeFile or NDPluginFile::readFile will have the same data type, data dimensions and attributes as this array.

Implemented in NDFileHDF5, NDFileJPEG, NDFileNexus, NDFileNetCDF, NDFileTIFF, NDFileMagick, ffmpegFile, NDFileNull, and pcoEdgePlugin.

◆ processCallbacks()

void NDPluginFile::processCallbacks ( NDArray pArray)
virtual

Callback function that is called by the NDArray driver with new NDArray data.

Saves a single file if NDFileWriteMode=NDFileModeSingle and NDAutoSave=1. Stores array in a capture buffer if NDFileWriteMode=NDFileModeCapture and NDFileCapture=1. Appends data to an open file if NDFileWriteMode=NDFileModeStream and NDFileCapture=1. In capture or stream mode if the desired number of arrays has been saved (NDFileNumCaptured=NDFileNumCapture) then it stops capture or streaming.

Parameters
[in]pArrayThe NDArray from the callback.

Implements NDPluginDriver.

Reimplemented in pcoEdgePlugin.

◆ readFile()

virtual asynStatus NDPluginFile::readFile ( NDArray **  pArray)
pure virtual

Read NDArray data from a file; pure virtual function that must be implemented by derived classes.

Parameters
[in]pArrayPointer to the address of an NDArray to read the data into.

Implemented in NDFileHDF5, NDFileJPEG, NDFileNexus, NDFileNetCDF, NDFileTIFF, NDFileMagick, ffmpegFile, NDFileNull, and pcoEdgePlugin.

◆ writeFile()

virtual asynStatus NDPluginFile::writeFile ( NDArray pArray)
pure virtual

Write NDArray data to a file; pure virtual function that must be implemented by derived classes.

Parameters
[in]pArrayPointer to an NDArray to write to the file. This function can be called multiple times between the call to openFile and closeFile if the class set supportsMultipleArrays=1 and NDFileModeMultiple was set in openMode in the call to NDPluginFile::openFile.

Implemented in NDFileHDF5, NDFileJPEG, NDFileNexus, NDFileNetCDF, NDFileTIFF, NDFileMagick, ffmpegFile, NDFileNull, and pcoEdgePlugin.

◆ writeInt32()

asynStatus NDPluginFile::writeInt32 ( asynUser *  pasynUser,
epicsInt32  value 
)
virtual

Called when asyn clients call pasynInt32->write().

This function performs actions for some parameters, including NDReadFile, NDWriteFile and NDFileCapture. For other parameters it calls NDPluginDriver::writeInt32 to see if that method understands the parameter. For all parameters it sets the value in the parameter library and calls any registered callbacks..

Parameters
[in]pasynUserpasynUser structure that encodes the reason and address.
[in]valueValue to write.

Reimplemented from NDPluginDriver.

Reimplemented in NDFileHDF5.

◆ writeNDArray()

asynStatus NDPluginFile::writeNDArray ( asynUser *  pasynUser,
void *  genericPointer 
)
virtual

Member Data Documentation

◆ supportsMultipleArrays

int NDPluginFile::supportsMultipleArrays

Derived classes must set this flag to 0/1 if they cannot/can write multiple NDArrays to a single file.

Used in capture and stream modes.


The documentation for this class was generated from the following files: