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ACloudViewer
3.9.4
A Modern Library for 3D Data Processing
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ACloudViewer
3.9.4
A Modern Library for 3D Data Processing
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#include <Decoder.h>
Public Member Functions | |
| BitpackIntegerDecoder (bool isScaledInteger, unsigned bytestreamNumber, SourceDestBuffer &dbuf, int64_t minimum, int64_t maximum, double scale, double offset, uint64_t maxRecordCount) | |
| size_t | inputProcessAligned (const char *inbuf, const size_t firstBit, const size_t endBit) override |
| void | dump (int indent=0, std::ostream &os=std::cout) override |
 Public Member Functions inherited from e57::BitpackDecoder | |
| void | destBufferSetNew (std::vector< SourceDestBuffer > &dbufs) override |
| uint64_t | totalRecordsCompleted () override |
| size_t | inputProcess (const char *source, const size_t availableByteCount) override |
| void | stateReset () override |
| Public Member Functions inherited from e57::Decoder | |
| Decoder ()=delete | |
| virtual | ~Decoder ()=default |
| unsigned | bytestreamNumber () const |
Protected Attributes | |
| bool | isScaledInteger_ |
| int64_t | minimum_ |
| int64_t | maximum_ |
| double | scale_ |
| double | offset_ |
| unsigned | bitsPerRecord_ |
| RegisterT | destBitMask_ |
| Protected Attributes inherited from e57::BitpackDecoder | |
| uint64_t | currentRecordIndex_ = 0 |
| uint64_t | maxRecordCount_ = 0 |
| std::shared_ptr< SourceDestBufferImpl > | destBuffer_ |
| std::vector< char > | inBuffer_ |
| size_t | inBufferFirstBit_ = 0 |
| size_t | inBufferEndByte_ = 0 |
| unsigned int | inBufferAlignmentSize_ |
| unsigned int | bitsPerWord_ |
| unsigned int | bytesPerWord_ |
| Protected Attributes inherited from e57::Decoder | |
| unsigned int | bytestreamNumber_ |
Additional Inherited Members | |
| Static Public Member Functions inherited from e57::Decoder | |
| static std::shared_ptr< Decoder > | DecoderFactory (unsigned bytestreamNumber, const CompressedVectorNodeImpl *cVector, std::vector< SourceDestBuffer > &dbufs, const ustring &codecPath) |
| Protected Member Functions inherited from e57::BitpackDecoder | |
| BitpackDecoder (unsigned bytestreamNumber, SourceDestBuffer &dbuf, unsigned alignmentSize, uint64_t maxRecordCount) | |
| void | inBufferShiftDown () |
| Protected Member Functions inherited from e57::Decoder | |
| Decoder (unsigned bytestreamNumber) | |
| BitpackIntegerDecoder::BitpackIntegerDecoder | ( | bool | isScaledInteger, |
| unsigned | bytestreamNumber, | ||
| SourceDestBuffer & | dbuf, | ||
| int64_t | minimum, | ||
| int64_t | maximum, | ||
| double | scale, | ||
| double | offset, | ||
| uint64_t | maxRecordCount | ||
| ) |
Get pointer to parent ImageFileImpl
Definition at line 643 of file Decoder.cpp.
References e57::BitpackIntegerDecoder< RegisterT >::bitsPerRecord_, e57::BitpackIntegerDecoder< RegisterT >::destBitMask_, e57::BitpackIntegerDecoder< RegisterT >::maximum_, and e57::BitpackIntegerDecoder< RegisterT >::minimum_.
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overridevirtual |
Reimplemented from e57::BitpackDecoder.
Definition at line 802 of file Decoder.cpp.
References e57::binaryString(), e57::BitpackDecoder::dump(), QtCompat::endl(), e57::hexString(), offset_, and e57::space().
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overridevirtual |
Read from inbuf, decode, store in destBuffer Repeat until have filled destBuffer, or completed all records
Verfiy first bit is in first word
Precalculate exact number of full records that are in inbuf We can handle the case where don't have a full word at end of inbuf, but all the bits of the record are there;
Number of transfers is the smaller of what was requested and what is available in input.
The index in inbuf of the word we are currently working on.
For example on little endian machine: Assume: registerT=uint32_t, bitOffset=20, destBitMask=0x00007fff (for a 15 bit value). inp[wordPosition] LLLLLLLL LLLLXXXX XXXXXXXX XXXXXXXX Note LSB of value is at bit20 inp(wordPosition+1] XXXXXXXX XXXXXXXX XXXXXXXX XXXXXHHH H=high bits of value, X=uninteresting bits low = inp[i] >> bitOffset 00000000 00000000 0000LLLL LLLLLLLL L=low bits of value, X=uninteresting bits high = inp[i+1] << (32-bitOffset) XXXXXXXX XXXXXXXX XHHH0000 00000000 w = high | low XXXXXXXX XXXXXXXX XHHHLLLL LLLLLLLL destBitmask 00000000 00000000 01111111 11111111 w & mask 00000000 00000000 0HHHLLLL LLLLLLLL
Get lower word (contains at least the LSbit of the value),
Get upper word (may or may not contain interesting bits),
Shift high to just above the lower bits, shift low LSBit to bit0, OR together. Note shifts are logical (not arithmetic) because using unsigned variables.
The left shift (used above) is not defined if shift is >= size of word
Mask off uninteresting bits
Add minimum_ to value to get back what writer originally sent
The parameter isScaledInteger_ determines which version of setNextInt64 gets called
Store the result in next avaiable position in the user's dest buffer
Calc next bit alignment and which word it starts in
Update counts of records processed
Return number of bits processed.
Implements e57::BitpackDecoder.
Definition at line 658 of file Decoder.cpp.
References e57::binaryString(), e57::E57_ERROR_INTERNAL, E57_EXCEPTION2, QtCompat::endl(), min(), offset_, and e57::toString().
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Definition at line 150 of file Decoder.h.
Referenced by e57::BitpackIntegerDecoder< RegisterT >::BitpackIntegerDecoder().
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Definition at line 151 of file Decoder.h.
Referenced by e57::BitpackIntegerDecoder< RegisterT >::BitpackIntegerDecoder().
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Definition at line 147 of file Decoder.h.
Referenced by e57::BitpackIntegerDecoder< RegisterT >::BitpackIntegerDecoder().
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Definition at line 146 of file Decoder.h.
Referenced by e57::BitpackIntegerDecoder< RegisterT >::BitpackIntegerDecoder().
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1.9.1