OpalVideoMediaStream Class Reference

#include <mediastrm.h>

Inheritance diagram for OpalVideoMediaStream:

List of all members.

Public Member Functions
Overrides of PChannel class
virtual BOOL	Open ()
virtual BOOL	ReadData (BYTE *data, PINDEX size, PINDEX &length)
virtual BOOL	WriteData (const BYTE *data, PINDEX length, PINDEX &written)
virtual BOOL	IsSynchronous () const
virtual BOOL	SetDataSize (PINDEX dataSize)
Protected Attributes
PVideoInputDevice *	inputDevice
PVideoOutputDevice *	outputDevice
BOOL	autoDelete
PTimeInterval	lastGrabTime

---

Detailed Description

This class describes a media stream that transfers data to/from a PVideoDevice.

---

Constructor & Destructor Documentation

OpalVideoMediaStream::OpalVideoMediaStream	(	const OpalMediaFormat &	mediaFormat,
		unsigned	sessionID,
		PVideoInputDevice *	inputDevice,
		PVideoOutputDevice *	outputDevice,
		BOOL	autoDelete = TRUE
	)

Construct a new media stream for channel.

Parameters:

mediaFormat	Media format for stream
sessionID	Session number for stream
inputDevice	Device to use for video grabbing
outputDevice	Device to use for video display
autoDelete	Automatically delete PVideoDevices

OpalVideoMediaStream::~OpalVideoMediaStream

(

)

Delete attached channel if autoDelete enabled.

OpalVideoMediaStream::OpalVideoMediaStream	(	const OpalMediaFormat &	mediaFormat,
		unsigned	sessionID,
		PVideoInputDevice *	inputDevice,
		PVideoOutputDevice *	outputDevice,
		BOOL	autoDelete = TRUE
	)

Construct a new media stream for channel.

Parameters:

mediaFormat	Media format for stream
sessionID	Session number for stream
inputDevice	Device to use for video grabbing
outputDevice	Device to use for video display
autoDelete	Automatically delete PVideoDevices

OpalVideoMediaStream::~OpalVideoMediaStream

(

)

Delete attached channel if autoDelete enabled.

---

Member Function Documentation

virtual BOOL 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 BOOL 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 BOOL 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.

virtual BOOL OpalVideoMediaStream::IsSynchronous

(

)

const [virtual]

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

Implements OpalMediaStream.

virtual BOOL OpalVideoMediaStream::SetDataSize

(

PINDEX

dataSize

)

[virtual]

Override size of frame header is included

Parameters:

dataSize

New data size

Reimplemented from OpalMediaStream.

---

Member Data Documentation

PVideoInputDevice* OpalVideoMediaStream::inputDevice [protected]

PVideoOutputDevice* OpalVideoMediaStream::outputDevice [protected]

BOOL OpalVideoMediaStream::autoDelete [protected]

PTimeInterval OpalVideoMediaStream::lastGrabTime [protected]

---

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

• mediastrm.h

---