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80 lines
No EOL
2.8 KiB
C++
80 lines
No EOL
2.8 KiB
C++
//
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// VoxelPacket.h
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// hifi
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//
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// Created by Brad Hefta-Gaub on 11/19/2013
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//
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//
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#ifndef __hifi__VoxelPacket__
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#define __hifi__VoxelPacket__
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#include <SharedUtil.h>
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#include "VoxelConstants.h"
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#include "VoxelNode.h"
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class VoxelPacket {
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public:
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VoxelPacket();
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~VoxelPacket();
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void reset();
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bool startSubTree(const unsigned char* octcode = NULL);
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void endSubTree();
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void discardSubTree();
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/// starts a level marker. returns an opaque key which can be used to discard the level
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int startLevel();
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/// discards all content back to a previous marker key
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void discardLevel(int key);
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/// ends a level without discarding it
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void endLevel();
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bool appendBitMask(unsigned char bitmask);
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/// updates the value of a bitmask from a previously appended portion of the uncompressed stream, might fail if the new
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/// bitmask would cause packet to be less compressed, or if offset was out of range.
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bool updatePriorBitMask(int offset, unsigned char bitmask);
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/// updates the uncompressed content of the stream starting at byte offset with replacementBytes for length.
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/// Might fail if the new bytes would cause packet to be less compressed, or if offset and length was out of range.
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bool updatePriorBytes(int offset, const unsigned char* replacementBytes, int length);
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bool appendColor(rgbColor color);
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/// returns a byte offset from beginning of the uncompressed stream based on offset from end.
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/// Positive offsetFromEnd returns that many bytes before the end of uncompressed stream
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int getUncompressedByteOffset(int offsetFromEnd = 0) const { return _bytesInUse - offsetFromEnd; }
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/// get access to the finalized data (it may be compressed or rewritten into optimal form)
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unsigned char* getFinalizedData() { return &_buffer[0]; }
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/// get size of the finalized data (it may be compressed or rewritten into optimal form)
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int getFinalizedSize() const { return _bytesInUse; }
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/// get pointer to the start of uncompressed stream buffer
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const unsigned char* getUncompressedData() { return &_buffer[0]; }
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/// the size of the packet in uncompressed form
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int getUncompressedSize() { return _bytesInUse; }
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/// has some content been written to the packet
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bool hasContent() const { return (_bytesInUse > 0); }
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// XXXBHG: TO DO...
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// * add stats tracking for number of bytes of octal code, bitmasks, and colors in a packet.
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private:
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/// appends raw bytes, might fail if byte would cause packet to be too large
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bool append(const unsigned char* data, int length);
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/// append a single byte, might fail if byte would cause packet to be too large
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bool append(unsigned char byte);
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unsigned char _buffer[MAX_VOXEL_PACKET_SIZE];
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int _bytesInUse;
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int _bytesAvailable;
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int _subTreeAt;
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};
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#endif /* defined(__hifi__VoxelPacket__) */ |