OpalRawMediaStream Class Reference

#include <mediastrm.h>

Inheritance diagram for OpalRawMediaStream:

Public Member Functions
Overrides of OpalMediaStream class
virtual PBoolean	ReadData (BYTE *data, PINDEX size, PINDEX &length)
virtual PBoolean	WriteData (const BYTE *data, PINDEX length, PINDEX &written)
PChannel *	GetChannel ()
bool	SetChannel (PChannel *channel, bool autoDelete=true)
virtual PBoolean	Close ()
virtual unsigned	GetAverageSignalLevel ()
Protected Member Functions
void	CollectAverage (const BYTE *buffer, PINDEX size)
Construction
	OpalRawMediaStream (OpalConnection &conn, const OpalMediaFormat &mediaFormat, unsigned sessionID, bool isSource, PChannel *channel, bool autoDelete)
	~OpalRawMediaStream ()
Protected Attributes
PChannel *	m_channel
bool	m_autoDelete
PMutex	m_channelMutex
PBYTEArray	m_silence
PUInt64	m_averageSignalSum
unsigned	m_averageSignalSamples
PMutex	m_averagingMutex

---

Detailed Description

This class describes a media stream that transfers PCM-16 data to/from a PChannel.

---

Constructor & Destructor Documentation

OpalRawMediaStream::OpalRawMediaStream	(	OpalConnection &	conn,
		const OpalMediaFormat &	mediaFormat,
		unsigned	sessionID,
		bool	isSource,
		PChannel *	channel,
		bool	autoDelete
	)			[protected]

Construct a new media stream for channel.

Parameters:

mediaFormat	Media format for stream
sessionID	Session number for stream
isSource	Is a source stream
channel	I/O channel to stream to/from
autoDelete	Automatically delete channel

OpalRawMediaStream::~OpalRawMediaStream

(

)

[protected]

Delete attached channel if autoDelete enabled.

---

Member Function Documentation

virtual PBoolean OpalRawMediaStream::Close

(

)

[virtual]

Close the media stream.

Closes the associated PChannel.

Reimplemented from OpalMediaStream.

void OpalRawMediaStream::CollectAverage	(	const BYTE *	buffer,
		PINDEX	size
	)			[protected]

virtual unsigned OpalRawMediaStream::GetAverageSignalLevel

(

)

[virtual]

Get average signal level in last frame.

PChannel* OpalRawMediaStream::GetChannel

(

)

[inline]

Return the associated PChannel

virtual PBoolean OpalRawMediaStream::ReadData	(	BYTE *	data,
		PINDEX	size,
		PINDEX &	length
	)			[virtual]

Read raw media data from the source media stream. The default behaviour reads from the PChannel object.

Parameters:

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

Reimplemented from OpalMediaStream.

Reimplemented in OpalFileMediaStream.

bool OpalRawMediaStream::SetChannel	(	PChannel *	channel,
		bool	autoDelete = true
	)

Set a new channel for raw PCM stream.

Parameters:

channel	New channel
autoDelete	Auto delete channel on exit or replacement

virtual PBoolean OpalRawMediaStream::WriteData	(	const BYTE *	data,
		PINDEX	length,
		PINDEX &	written
	)			[virtual]

Write raw media data to the sink media stream. The default behaviour writes to the PChannel object.

Parameters:

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

Reimplemented from OpalMediaStream.

Reimplemented in OpalFileMediaStream.

---

Field Documentation

bool OpalRawMediaStream::m_autoDelete [protected]

unsigned OpalRawMediaStream::m_averageSignalSamples [protected]

PUInt64 OpalRawMediaStream::m_averageSignalSum [protected]

PMutex OpalRawMediaStream::m_averagingMutex [protected]

PChannel* OpalRawMediaStream::m_channel [protected]

PMutex OpalRawMediaStream::m_channelMutex [protected]

PBYTEArray OpalRawMediaStream::m_silence [protected]

---

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

• mediastrm.h

---