OpalVideoMediaStream Class Reference

#include <mediastrm.h>

Inheritance diagram for OpalVideoMediaStream:

Collaboration diagram for OpalVideoMediaStream:

Public Member Functions
Construction
	OpalVideoMediaStream (OpalConnection &conn, const OpalMediaFormat &mediaFormat, unsigned sessionID, PVideoInputDevice *inputDevice, PVideoOutputDevice *outputDevice, bool autoDeleteInput=true, bool autoDeleteOutput=true)
	~OpalVideoMediaStream ()
Overrides of PChannel class
virtual PBoolean	Open ()
virtual PBoolean	ReadData (BYTE *data, PINDEX size, PINDEX &length)
virtual PBoolean	WriteData (const BYTE *data, PINDEX length, PINDEX &written)
virtual PBoolean	IsSynchronous () const
virtual PBoolean	SetDataSize (PINDEX dataSize, PINDEX frameTime)
virtual void	SetVideoInputDevice (PVideoInputDevice *device, bool autoDelete=true)
virtual PVideoInputDevice *	GetVideoInputDevice () const
virtual void	SetVideoOutputDevice (PVideoOutputDevice *device, bool autoDelete=true)
virtual PVideoOutputDevice *	GetVideoOutputDevice () const
Public Member Functions inherited from OpalMediaStream
virtual bool	InternalSetPaused (bool pause, bool fromUser, bool fromPatch)
void	PrintOn (ostream &strm) const
virtual OpalMediaFormat	GetMediaFormat () const
virtual bool	SetMediaFormat (const OpalMediaFormat &mediaFormat)
bool	UpdateMediaFormat (const OpalMediaFormat &mediaFormat, bool mergeOnly=false)
bool	ExecuteCommand (const OpalMediaCommand &command) const
virtual bool	IsOpen () const
virtual PBoolean	Start ()
virtual PBoolean	Close ()
virtual void	OnStartMediaPatch ()
virtual void	OnStopMediaPatch (OpalMediaPatch &patch)
virtual PBoolean	WritePackets (RTP_DataFrameList &packets)
virtual PBoolean	ReadPacket (RTP_DataFrame &packet)
virtual PBoolean	WritePacket (RTP_DataFrame &packet)
bool	PushPacket (RTP_DataFrame &packet)
PINDEX	GetDataSize () const
virtual PBoolean	RequiresPatchThread (OpalMediaStream *stream) const
virtual PBoolean	RequiresPatchThread () const
virtual bool	EnableJitterBuffer (bool enab=true) const
OpalConnection &	GetConnection () const
bool	IsSource () const
bool	IsSink () const
unsigned	GetSessionID () const
void	SetSessionID (unsigned id)
PString	GetID () const
unsigned	GetTimestamp () const
void	SetTimestamp (unsigned ts)
bool	GetMarker () const
void	SetMarker (bool m)
bool	IsPaused () const
bool	SetPaused (bool pause)
virtual PBoolean	SetPatch (OpalMediaPatch *patch)
OpalMediaPatchPtr	GetPatch () const
void	AddFilter (const PNotifier &filter, const OpalMediaFormat &stage=OpalMediaFormat()) const
bool	RemoveFilter (const PNotifier &filter, const OpalMediaFormat &stage=OpalMediaFormat()) const
virtual void	GetStatistics (OpalMediaStatistics &statistics, bool fromPatch=false) const
	P_DECLARE_BITWISE_ENUM (Details, 6,(DetailMinimum, DetailEOL, DetailNAT, DetailSecured, DetailFEC, DetailAudio, DetailAddresses))
virtual void	PrintDetail (ostream &strm, const char *prefix=NULL, Details details=Details::All()) const
	~OpalMediaStream ()

Protected Member Functions
virtual void	InternalClose ()
virtual bool	InternalUpdateMediaFormat (const OpalMediaFormat &newMediaFormat)
virtual bool	InternalExecuteCommand (const OpalMediaCommand &command)
bool	InternalAdjustDevices ()
Protected Member Functions inherited from OpalMediaStream
void	IncrementTimestamp (PINDEX size)
bool	InternalWriteData (const BYTE *data, PINDEX length, PINDEX &written)
OpalMediaPatchPtr	InternalSetPatchPart1 (OpalMediaPatch *newPatch)
void	InternalSetPatchPart2 (const OpalMediaPatchPtr &oldPatch)
virtual bool	InternalSetJitterBuffer (const OpalJitterBuffer::Init &init) const
	OpalMediaStream (OpalConnection &conn, const OpalMediaFormat &mediaFormat, unsigned sessionID, bool isSource)

Protected Attributes
PVideoInputDevice *	m_inputDevice
PVideoOutputDevice *	m_outputDevice
bool	m_autoDeleteInput
bool	m_autoDeleteOutput
PTimeInterval	m_lastGrabTime
bool	m_needKeyFrame
PMutex	m_devicesMutex
Protected Attributes inherited from OpalMediaStream
OpalConnection &	connection
unsigned	sessionID
WORD	m_sequenceNumber
PString	identifier
OpalMediaFormat	mediaFormat
bool	m_paused
bool	m_isSource
bool	m_isOpen
PINDEX	m_defaultDataSize
unsigned	timestamp
bool	marker
OpalMediaPatchPtr	m_mediaPatch
RTP_DataFrame::PayloadTypes	m_payloadType
unsigned	m_frameTime
PINDEX	m_frameSize

Additional Inherited Members
Protected Types inherited from OpalMediaStream
typedef OpalMediaPatchPtr	PatchPtr

Constructor & Destructor Documentation

OpalVideoMediaStream::OpalVideoMediaStream	(	OpalConnection &	conn,
		const OpalMediaFormat &	mediaFormat,
		unsigned	sessionID,
		PVideoInputDevice *	inputDevice,
		PVideoOutputDevice *	outputDevice,
		bool	autoDeleteInput = true,
		bool	autoDeleteOutput = true
	)

Construct a new media stream for channel.

Parameters

conn	Connection that owns the stream
mediaFormat	Media format for stream
sessionID	Session number for stream
inputDevice	Device to use for video grabbing
outputDevice	Device to use for video display
autoDeleteInput	Automatically delete PVideoInputDevice
autoDeleteOutput	Automatically delete PVideoOutputDevice

OpalVideoMediaStream::~OpalVideoMediaStream

(

)

Delete attached channel if autoDelete enabled.

Member Function Documentation

virtual PVideoInputDevice* OpalVideoMediaStream::GetVideoInputDevice ( ) const

inlinevirtual

Get the input device (e.g. for statistics)

References m_inputDevice.

virtual PVideoOutputDevice* OpalVideoMediaStream::GetVideoOutputDevice ( ) const

inlinevirtual

Get the output device (e.g. for statistics)

References m_outputDevice.

bool OpalVideoMediaStream::InternalAdjustDevices ( )

protected

virtual void OpalVideoMediaStream::InternalClose ( )

protectedvirtual

Close any internal components of the stream. This should be used in preference to overriding the Close() function as it is guaranteed to be called exactly once and avoids race conditions in the shut down sequence of a media stream.

Implements OpalMediaStream.

virtual bool OpalVideoMediaStream::InternalExecuteCommand ( const OpalMediaCommand &  command )

protectedvirtual

Reimplemented from OpalMediaStream.

virtual bool OpalVideoMediaStream::InternalUpdateMediaFormat ( const OpalMediaFormat &  newMediaFormat )

protectedvirtual

Reimplemented from OpalMediaStream.

virtual PBoolean OpalVideoMediaStream::IsSynchronous ( ) const

virtual

Indicate if the media stream is synchronous. Returns true for LID streams.

Implements OpalMediaStream.

virtual PBoolean OpalVideoMediaStream::Open ( )

virtual

Open the media stream.

The default behaviour sets the OpalLineInterfaceDevice format and calls Resume() on the associated OpalMediaPatch thread.

Reimplemented from OpalMediaStream.

virtual PBoolean OpalVideoMediaStream::ReadData ( BYTE *  data, PINDEX  size, PINDEX &  length  )

virtual

Read raw media data from the source media stream. The default behaviour simply calls ReadPacket() on the data portion of the RTP_DataFrame and sets the frames timestamp and marker from the internal member variables of the media stream class.

Parameters

data	Data buffer to read to
size	Size of buffer
length	Length of data actually read

Reimplemented from OpalMediaStream.

virtual PBoolean OpalVideoMediaStream::SetDataSize ( PINDEX  dataSize, PINDEX  frameTime  )

virtual

Override size of frame header is included

Parameters

dataSize	New data size (in total)
frameTime	Individual frame time (if applicable)

Reimplemented from OpalMediaStream.

virtual void OpalVideoMediaStream::SetVideoInputDevice ( PVideoInputDevice *  device, bool  autoDelete = true  )

virtual

Set the input device

virtual void OpalVideoMediaStream::SetVideoOutputDevice ( PVideoOutputDevice *  device, bool  autoDelete = true  )

virtual

Set the output device

virtual PBoolean OpalVideoMediaStream::WriteData ( const BYTE *  data, PINDEX  length, PINDEX &  written  )

virtual

Write raw media data to the sink media stream. The default behaviour calls WritePacket() on the data portion of the RTP_DataFrame and and sets the internal timestamp and marker from the member variables of the media stream class.

Parameters

data	Data to write
length	Length of data to read.
written	Length of data actually written

Reimplemented from OpalMediaStream.

Field Documentation

bool OpalVideoMediaStream::m_autoDeleteInput

protected

bool OpalVideoMediaStream::m_autoDeleteOutput

protected

PMutex OpalVideoMediaStream::m_devicesMutex

protected

PVideoInputDevice* OpalVideoMediaStream::m_inputDevice

protected

Referenced by GetVideoInputDevice().

PTimeInterval OpalVideoMediaStream::m_lastGrabTime

protected

bool OpalVideoMediaStream::m_needKeyFrame

protected

PVideoOutputDevice* OpalVideoMediaStream::m_outputDevice

protected

Referenced by GetVideoOutputDevice().

---

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

• mediastrm.h