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Eric MacDonald
2021-09-08 18:33:05 -04:00
parent d6d2c75d72
commit 2b95402b14
1 changed files with 11 additions and 8 deletions
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zefie_wtvp_minisrv/WTVLzpf.js
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/** /**
* Pure-JS implementation of WebTV's LZPF compression * Pure-JS implementation of WebTV's LZPF compression
* *
* This is a port of my Lzpf compression code from my ROMFS Python tool * This compression algorithm is based on LZP by Charles Bloom and was originally written for server to client communication by Andy McFadden
* Originally reverse engineered from the box * This uses a (static) Huffman dictionary that was tuned for character occurances in a typical HTML page at the time (around 1996-1997).
* *
* By: Eric MacDonald (eMac) * Andy McFadden: https://fadden.com/
* LZP: https://en.wikibooks.org/wiki/Data_Compression/Dictionary_compression#LZP
*
* Reverse engineered and ported by: Eric MacDonald (eMac)
* Modified By: zefie * Modified By: zefie
*/ **/
class WTVLzpf { class WTVLzpf {
// Note: currentlty doesn't offer optimal streaming support but this is good enough to meet perf demands at the scale we're at. // Note: currentlty doesn't offer optimal streaming support but this is good enough to meet perf demands at the scale we're at.