Take an array source and compress it and serve it as an mjpeg stream. More...

#include <ffmpegServer.h>

Inheritance diagram for ffmpegStream:

Public Member Functions
	ffmpegStream (const char portName, int queueSize, int blockingCallbacks, const char NDArrayPort, int NDArrayAddr, int maxBuffers, int maxMemory, int priority, int stackSize)
	Constructor for ffmpegStream; Class representing an mjpg stream served up by ffmpegServer. More...

void	processCallbacks (NDArray *pArray)
	Take an NDArray, add grid and false colour, compress it to a jpeg, then signal to the server process that there is a new frame available. More...

int	send_frame (int sid, NDArray *pArray)
	Internal function to send a jpeg frame as part of an mjpeg stream. More...

void	send_stream (int sid)
	Internal function to send an mjpg stream. More...

void	send_snapshot (int sid, int index)
	Internal function to send a single snapshot. 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	writeInt32 (asynUser *pasynUser, epicsInt32 value)
	Called when asyn clients call pasynInt32->write(). More...

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	setIntegerParam (int index, int value)
	Sets the value for an integer in the parameter library. More...

virtual asynStatus	setIntegerParam (int list, int index, int value)
	Sets the value for an integer in the parameter library. More...

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...

virtual void	updateTimeStamps (NDArray *pArray)

asynStatus	incrementQueuedArrayCount ()

asynStatus	decrementQueuedArrayCount ()

int	getQueuedArrayCount ()

void	updateQueuedArrayCount ()

Protected Attributes
int	ffmpegServerQuality

int	ffmpegServerFalseCol

int	ffmpegServerHttpPort

int	ffmpegServerHost

int	ffmpegServerJpgUrl

int	ffmpegServerMjpgUrl

int	ffmpegServerClients

int	ffmpegServerMaxW

int	ffmpegServerMaxH

int	ffmpegServerSetW

int	ffmpegServerSetH

int	ffmpegServerAlwaysOn

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

NDArray *	pPrevInputArray_

Protected Attributes inherited from asynNDArrayDriver
int	NDPortNameSelf

int	NDADCoreVersion

int	NDDriverVersion

int	ADManufacturer

int	ADModel

int	ADSerialNumber

int	ADSDKVersion

int	ADFirmwareVersion

int	ADAcquire

int	ADAcquireBusy

int	ADWaitForPlugins

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	NDFileFreeCapture

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	NDPoolPreAllocBuffers

int	NDPoolNumPreAllocBuffers

int	NDPoolFreeBuffers

int	NDPoolMaxMemory

int	NDPoolUsedMemory

int	NDPoolEmptyFreeList

int	NDPoolPollStats

int	NDNumQueuedArrays

class NDArray **	pArrays
	An array of NDArray pointers used to store data in the driver. More...

class NDAttributeList *	pAttributeList
	An NDAttributeList object used to obtain the current values of a set of attributes. More...

int	threadStackSize_

int	threadPriority_

Additional Inherited Members
Public Attributes inherited from asynNDArrayDriver
class NDArrayPool *	pNDArrayPool
	An NDArrayPool pointer that is initialized to pNDArrayPoolPvt_ in the constructor. More...

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)

Detailed Description

Take an array source and compress it and serve it as an mjpeg stream.

Constructor & Destructor Documentation

◆ ffmpegStream()

ffmpegStream::ffmpegStream	(	const char *	portName,
		int	queueSize,
		int	blockingCallbacks,
		const char *	NDArrayPort,
		int	NDArrayAddr,
		int	maxBuffers,
		int	maxMemory,
		int	priority,
		int	stackSize
	)

Constructor for ffmpegStream; Class representing an mjpg stream served up by ffmpegServer.

ffmpegServerConfigure() must be called before creating any instances of this class. ffmpegStreamConfigure() should be used to create an instance in the iocsh. See ffmpegStream.template for more details of usage.

\param portName The name of the asyn port driver to be created.
\param queueSize The 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.
\param blockingCallbacks Initial 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.
\param NDArrayPort Name of asyn port driver for initial source of NDArray callbacks.
\param NDArrayAddr asyn port driver address for initial source of NDArray callbacks.
\param maxBuffers The maximum number of NDArray buffers that the NDArrayPool for this driver is 
       allowed to allocate. Set this to -1 to allow an unlimited number of buffers.
\param maxMemory The maximum amount of memory that the NDArrayPool for this driver is 
       allowed to allocate. Set this to -1 to allow an unlimited amount of memory.
\param priority The thread priority for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.
\param stackSize The stack size for the asyn port driver thread if ASYN_CANBLOCK is set in asynFlags.

Member Function Documentation

◆ processCallbacks()

void ffmpegStream::processCallbacks ( NDArray * pArray )

virtual

Take an NDArray, add grid and false colour, compress it to a jpeg, then signal to the server process that there is a new frame available.

Implements NDPluginDriver.

◆ send_frame()

int ffmpegStream::send_frame	(	int	sid,
		NDArray *	pArray
	)

Internal function to send a jpeg frame as part of an mjpeg stream.

◆ send_snapshot()

void ffmpegStream::send_snapshot	(	int	sid,
		int	index
	)

Internal function to send a single snapshot.

◆ send_stream()

void ffmpegStream::send_stream ( int sid )

Internal function to send an mjpg stream.

Member Data Documentation

◆ ffmpegServerAlwaysOn

int ffmpegStream::ffmpegServerAlwaysOn

protected

◆ ffmpegServerClients

int ffmpegStream::ffmpegServerClients

protected

◆ ffmpegServerFalseCol

int ffmpegStream::ffmpegServerFalseCol

protected

◆ ffmpegServerHost

int ffmpegStream::ffmpegServerHost

protected

◆ ffmpegServerHttpPort

int ffmpegStream::ffmpegServerHttpPort

protected

◆ ffmpegServerJpgUrl

int ffmpegStream::ffmpegServerJpgUrl

protected

◆ ffmpegServerMaxH

int ffmpegStream::ffmpegServerMaxH

protected

◆ ffmpegServerMaxW

int ffmpegStream::ffmpegServerMaxW

protected

◆ ffmpegServerMjpgUrl

int ffmpegStream::ffmpegServerMjpgUrl

protected

◆ ffmpegServerQuality

int ffmpegStream::ffmpegServerQuality

protected

◆ ffmpegServerSetH

int ffmpegStream::ffmpegServerSetH

protected

◆ ffmpegServerSetW

int ffmpegStream::ffmpegServerSetW

protected

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

/home/runner/work/areaDetector/areaDetector/ffmpegServer/ffmpegServerApp/src/ffmpegServer.h
/home/runner/work/areaDetector/areaDetector/ffmpegServer/ffmpegServerApp/src/ffmpegServer.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ ffmpegStream()

Member Function Documentation

◆ processCallbacks()

◆ send_frame()

◆ send_snapshot()

◆ send_stream()

Member Data Documentation

◆ ffmpegServerAlwaysOn

◆ ffmpegServerClients

◆ ffmpegServerFalseCol

◆ ffmpegServerHost

◆ ffmpegServerHttpPort

◆ ffmpegServerJpgUrl

◆ ffmpegServerMaxH

◆ ffmpegServerMaxW

◆ ffmpegServerMjpgUrl

◆ ffmpegServerQuality

◆ ffmpegServerSetH

◆ ffmpegServerSetW