e57::BitpackStringEncoder Class Reference

#include <Encoder.h>

Inheritance diagram for e57::BitpackStringEncoder:

Collaboration diagram for e57::BitpackStringEncoder:

Public Member Functions
	BitpackStringEncoder (unsigned bytestreamNumber, SourceDestBuffer &sbuf, unsigned outputMaxSize)
uint64_t	processRecords (size_t recordCount) override
bool	registerFlushToOutput () override
float	bitsPerRecord () override
void	dump (int indent=0, std::ostream &os=std::cout) const override
Public Member Functions inherited from e57::BitpackEncoder
unsigned	sourceBufferNextIndex () override
uint64_t	currentRecordIndex () override
size_t	outputAvailable () const override
void	outputRead (char *dest, const size_t byteCount) override
	number of bytes that can be read More...
void	outputClear () override
	get data from encoder More...
void	sourceBufferSetNew (std::vector< SourceDestBuffer > &sbufs) override
size_t	outputGetMaxSize () override
void	outputSetMaxSize (unsigned byteCount) override
Public Member Functions inherited from e57::Encoder
virtual	~Encoder ()=default
unsigned	bytestreamNumber () const

Protected Attributes
uint64_t	totalBytesProcessed_
bool	isStringActive_
bool	prefixComplete_
ustring	currentString_
size_t	currentCharPosition_
Protected Attributes inherited from e57::BitpackEncoder
std::shared_ptr< SourceDestBufferImpl >	sourceBuffer_
std::vector< char >	outBuffer_
size_t	outBufferFirst_
size_t	outBufferEnd_
size_t	outBufferAlignmentSize_
uint64_t	currentRecordIndex_
Protected Attributes inherited from e57::Encoder
unsigned	bytestreamNumber_

Additional Inherited Members
Static Public Member Functions inherited from e57::Encoder
static std::shared_ptr< Encoder >	EncoderFactory (unsigned bytestreamNumber, std::shared_ptr< CompressedVectorNodeImpl > cVector, std::vector< SourceDestBuffer > &sbuf, ustring &codecPath)
Protected Member Functions inherited from e57::BitpackEncoder
	BitpackEncoder (unsigned bytestreamNumber, SourceDestBuffer &sbuf, unsigned outputMaxSize, unsigned alignmentSize)
	================ More...
void	outBufferShiftDown ()
Protected Member Functions inherited from e57::Encoder
	Encoder (unsigned bytestreamNumber)

Detailed Description

Definition at line 125 of file Encoder.h.

Constructor & Destructor Documentation

BitpackStringEncoder()

BitpackStringEncoder::BitpackStringEncoder	(	unsigned	bytestreamNumber,
		SourceDestBuffer &	sbuf,
		unsigned	outputMaxSize
	)

Definition at line 477 of file Encoder.cpp.

Member Function Documentation

bitsPerRecord()

float BitpackStringEncoder::bitsPerRecord ( )

overridevirtual

Return average number of bits in strings + 8 bits for prefix

We haven't completed a record yet, so guess 100 bytes per record

Implements e57::BitpackEncoder.

Definition at line 609 of file Encoder.cpp.

References e57::BitpackEncoder::currentRecordIndex_, and totalBytesProcessed_.

dump()

void BitpackStringEncoder::dump ( int  indent = 0, std::ostream &  os = std::cout  ) const

overridevirtual

Reimplemented from e57::BitpackEncoder.

Definition at line 622 of file Encoder.cpp.

References currentCharPosition_, currentString_, e57::BitpackEncoder::dump(), QtCompat::endl(), isStringActive_, prefixComplete_, e57::space(), and totalBytesProcessed_.

processRecords()

uint64_t BitpackStringEncoder::processRecords ( size_t  recordCount )

overridevirtual

Before we add any more, try to shift current contents of outBuffer_ down to beginning of buffer.

Figure out how many bytes outBuffer can accept.

Form the starting address for next available location in outBuffer

Don't start loop unless have at least 8 bytes for worst case string length prefix

Calc the length prefix, either 1 byte or 8 bytes

We can use the short length prefix: b0=0, b7-b1=len

Double check have space

We use the long length prefix: b0=1, b63-b1=len, and store in little endian order Shift the length and set the least significant bit, b0=1.

Copy as much string as will fit in outBuffer

Check if finished string

Get next string from sourceBuffer

Update end of outBuffer

Update counts of records processed

Implements e57::BitpackEncoder.

Definition at line 484 of file Encoder.cpp.

References currentCharPosition_, e57::BitpackEncoder::currentRecordIndex_, currentString_, e57::E57_ERROR_INTERNAL, E57_EXCEPTION2, QtCompat::endl(), isStringActive_, min(), e57::BitpackEncoder::outBuffer_, e57::BitpackEncoder::outBufferEnd_, e57::BitpackEncoder::outBufferShiftDown(), prefixComplete_, e57::BitpackEncoder::sourceBuffer_, e57::toString(), and totalBytesProcessed_.

registerFlushToOutput()

bool BitpackStringEncoder::registerFlushToOutput ( )

overridevirtual

Since have no registers in encoder, return success

Implements e57::BitpackEncoder.

Definition at line 603 of file Encoder.cpp.

Member Data Documentation

currentCharPosition_

size_t e57::BitpackStringEncoder::currentCharPosition_

protected

Definition at line 142 of file Encoder.h.

Referenced by dump(), and processRecords().

currentString_

ustring e57::BitpackStringEncoder::currentString_

protected

Definition at line 141 of file Encoder.h.

Referenced by dump(), and processRecords().

isStringActive_

bool e57::BitpackStringEncoder::isStringActive_

protected

Definition at line 139 of file Encoder.h.

Referenced by dump(), and processRecords().

prefixComplete_

bool e57::BitpackStringEncoder::prefixComplete_

protected

Definition at line 140 of file Encoder.h.

Referenced by dump(), and processRecords().

totalBytesProcessed_

uint64_t e57::BitpackStringEncoder::totalBytesProcessed_

protected

Definition at line 138 of file Encoder.h.

Referenced by bitsPerRecord(), dump(), and processRecords().

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

• /root/ACloudViewer/plugins/core/IO/qE57IO/extern/libE57Format/src/Encoder.h
• /root/ACloudViewer/plugins/core/IO/qE57IO/extern/libE57Format/src/Encoder.cpp