Media!Lab Base Foundation Classes

Foundation
Classes

Class Summary - Foundation Classes


 mObject . . . . . . Media!Lab base object class
 mFile . . . . . . . optimized multimedia file I/O class

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mObject Class

The mObject class serves as the base class for all Media!Lab objects. mObject defines the basic class error and warning methods for Media!Lab objects. mObject methods include:


Error() . . . . . . . display Media!Lab error messages
Warning() . . . . . . display Media!Lab warning messages
mClearMem() . . . . . clear a block of memory to zero
mClearStruct(). . . . clear a structure to zero
mArrayCnt() . . . . . count number of elements in an array
mFourCC() . . . . . . pack 4 character codes into a DWORD
mMemCopy(). . . . . . copy bytes in memory (optimized)
mMemSetByte() . . . . set bytes to a fixed value
mMemSetWord() . . . . set words to a fixed value

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mFile Class

The mFile class handles file I/O for fast multimedia access. Files can reside either on an external device (such as disk or CD-ROM), or locally in memory for fastest access. The mFile class methods provide support for both standard buffered-I/O, and direct access Block-I/O for quick multimedia processing. mFile functions include:


mFile() . . . . . . . constructor
Open(). . . . . . . . open a disk file
Open(). . . . . . . . open a memory file
Read(). . . . . . . . read to buffer (buffer I/O)
ReadBlock() . . . . . read next block (block I/O)
Seek(). . . . . . . . seek to file position
SetBlockSize(). . . . set the block size
SetBlockBuffer(). . . set a user block buffer
ReadCheck() . . . . . check that data is within the current block
EOFCheck(). . . . . . check for End-Of-File
GetPosition() . . . . return the file position
Close() . . . . . . . close the file
~mFile(). . . . . . . destructor

RiffBegin() . . . . . RIFF file handling routines
RiffBeginList() . . . 
RiffBeginChunk(). . . 
RiffEndList() . . . . 
RiffEndChunk(). . . . 
RiffSkipChunk() . . . 
RiffSize(). . . . . .