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RLE

RLE compressor/decompressor

Important

This repository is archive purpose only, development repository is now migrated to here.

Compression/Decompression example:

Normal RLE algorithm

01 23 45 45 = 01 23 45 45 (00)

67 67 67 67 = 67 67 (02)

89 89 89 89 89 89 = 89 89 (04)

01 01 01 01 01 23 = 01 01 (03) 23

Delta RLE algorithm

01 23 45 67 89 89 = 01 22 22 (02) 00

12 12 12 23 23 23 23 23 = 12 00 00 (00) 11 00 00 (02)

The number in parentheses (Length value, Variable size) is the number of times to repeat the previous byte.

Length value format:

0-127: 0 aaa aaaa = 1 byte (a)

128-16511: 1 aaa aaaa 0 bbb bbbb = 2 bytes (a + (b * 128) + 128)

16512-2113663: 1 aaa aaaa 1 bbb bbbb 0 ccc cccc = 3 bytes (a + (b * 128) + (c * 16384) + 16512)

...

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