OpalMediaCommand Class Reference

#include <mediacmd.h>

Inheritance diagram for OpalMediaCommand:

Public Member Functions
Overrides from PObject
void	PrintOn (ostream &strm) const
virtual Comparison	Compare (const PObject &obj) const
Operations
virtual PString	GetName () const =0
virtual void *	GetPlugInData () const
virtual unsigned *	GetPlugInSize () const

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Detailed Description

This is the base class for a command to a media transcoder and/or media stream. The commands are highly context sensitive, for example OpalVideoUpdatePicture would only apply to a video transcoder.

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Member Function Documentation

virtual Comparison OpalMediaCommand::Compare

(

const PObject &

obj

)

const [inline, virtual]

Compare the two objects and return their relative rank. This function is usually overridden by descendent classes to yield the ranking according to the semantics of the object.

The default function is to use the CompareObjectMemoryDirect() function to do a byte wise memory comparison of the two objects.

Returns:

LessThan, EqualTo or GreaterThan according to the relative rank of the objects.

Parameters:

obj	Object to compare against.

virtual PString OpalMediaCommand::GetName

(

)

const [pure virtual]

Get the name of the command.

Implemented in OpalVideoUpdatePicture, OpalVideoPictureLoss, and OpalTemporalSpatialTradeOff.

virtual void* OpalMediaCommand::GetPlugInData

(

)

const [inline, virtual]

Get data buffer pointer for transfer to/from codec plug-in.

virtual unsigned* OpalMediaCommand::GetPlugInSize

(

)

const [inline, virtual]

Get data buffer size for transfer to/from codec plug-in.

void OpalMediaCommand::PrintOn

(

ostream &

strm

)

const [inline]

Standard stream print function. The PObject class has a << operator defined that calls this function polymorphically.

Parameters:

strm	Stream to output text representation

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

• mediacmd.h

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