AxPipe::Stock::CPipeFindSync Class Reference

Scan a stream for a sync-sequence, skipping until found. More...

#include <CPipeFindSync.h>

Inheritance diagram for AxPipe::Stock::CPipeFindSync:

[legend]Collaboration diagram for AxPipe::Stock::CPipeFindSync:

[legend]List of all members.

Public Member Functions
CPipeFindSync *	Init (const void *p, size_t cb, bool fInvert=false, int iSkipTo=1)
	Set the sync sequence to look for.
Protected Member Functions
void	Out (AxPipe::CSeg *pSeg)
	Accept pushed data and skip until sync.
Private Member Functions
void	PumpBuf (size_t cbBuf)
	Re-generate early parts of the sync sequence.
Private Attributes
int	m_iSkipTo
	Number of GUID's to skip + 1.
const unsigned char *	m_pPattern
	Ptr to the pattern to search for.
size_t	m_cbPattern
	Length of pattern.
size_t	m_iNext
	Index of next byte to match in pattern.
int	m_iInvert
	Flag set to 1 if we are to bit-flip the pattern.
bool	m_fSkipAfterSync
	Determine what happens after we've sync'd-.

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Detailed Description

Scan a stream for a sync-sequence, skipping until found.

Find sync and start or stop passing it on from that point. The default is to start passing data after the first sync that is found, but it's possible to specify how many to skip. The actual sync sequence is not passed along, only the data following it. In some cases it may be necessary to bit-flip the pattern before compare, do specify in the call to Init().

Definition at line 48 of file CPipeFindSync.h.

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Member Function Documentation

AxPipe::Stock::CPipeFindSync * AxPipe::Stock::CPipeFindSync::Init (  const void *  p, size_t  cb, bool  fInvert = false, int  iSkipTo = 1 )

Set the sync sequence to look for. Initialize the pattern to sync with. Note that the we only save a reference to the pattern, so it must not be destructed before this object. Use a negative value of iSkipTo to indicate that you'd like to pass data _until_ the given number of patterns are detected. Parameters: p  The pattern, do not destruct before this object. cb  The length of the pattern in p fInvert  Set to true if the pattern should be bitflipped before comparison iSkipTo  The number of syncs to find before starting/stopping pass-through Returns: A pointer to 'this' Definition at line 44 of file CPipeFindSync.cpp. References m_cbPattern, m_fSkipAfterSync, m_iInvert, m_iNext, m_iSkipTo, and m_pPattern.

void AxPipe::Stock::CPipeFindSync::Out (  AxPipe::CSeg *  pSeg  )  [protected, virtual]

Accept pushed data and skip until sync. Accepted segements of pushed data, skipping m_iSkipTo number of occurrences of of the pattern represented by m_pPattern and m_cbPattern before starting to to pass segments through. Parameters: pSeg  The AxPipe::CSeg that contains the next data segment Implements AxPipe::CPipe. Definition at line 72 of file CPipeFindSync.cpp.

void AxPipe::Stock::CPipeFindSync::PumpBuf (  size_t  cbBuf  )  [private]

Re-generate early parts of the sync sequence. Regenerate a partial sync sequence that we've already passed Parameters: cbMunched  The number of sync sequence bytes to re-generate Definition at line 57 of file CPipeFindSync.cpp.

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

• CPipeFindSync.h
• CPipeFindSync.cpp

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