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Author	SHA1	Message	Date
emmanuel-marty	a708a02048	Fix compilation warning	2019-05-14 12:18:35 +02:00
emmanuel-marty	277b5b1025	Move top-level streaming compression code to library	2019-05-13 22:22:53 +02:00
emmanuel-marty	0f4ffa7166	Clean up check for emitting a single raw block	2019-05-12 23:21:50 +02:00
emmanuel-marty	c96594680a	Use full BLOCK_SIZE for dictionary, and use last BLOCK_SIZE bytes rather than first	2019-05-12 14:44:28 +02:00
emmanuel-marty	3caa72c722	Clarify optimizer	2019-05-11 11:42:18 +02:00
emmanuel-marty	d70830b525	Simplify nibble handling in LZSA2 8088 depacker	2019-05-11 11:42:00 +02:00
emmanuel-marty	8b7b4a2b4f	Check in LZSA2 implementation (ratio competitive with ZX7, faster decompression)	2019-05-09 16:51:29 +02:00
emmanuel-marty	49b0739050	Isolate frame implementation details	2019-05-03 19:17:14 +02:00
emmanuel-marty	31ededcdf7	Rejoin large patterns	2019-05-03 13:45:37 +02:00
emmanuel-marty	4011d7d3c8	Check in VS 2017 project	2019-05-02 23:51:42 +02:00
emmanuel-marty	bab5225e4c	Implement dictionary support	2019-05-02 18:38:57 +02:00
emmanuel-marty	ef6b43a296	When using -m, decompress ~7% faster by trading ~0.5% of compression ratio	2019-05-02 11:23:57 +02:00
emmanuel-marty	97dd3ffc1f	Update fast Z80 decompressor	2019-04-25 17:19:58 +02:00
emmanuel-marty	bd6e31b03c	Update stats	2019-04-25 13:03:38 +02:00
emmanuel-marty	9e75a55dd3	Reduce token count by 1% without changing the ratio	2019-04-25 13:01:56 +02:00
emmanuel-marty	b7967c3aa1	Update README	2019-04-24 10:02:35 +02:00
emmanuel-marty	2b9780bd65	Finalize lzsa1 compressed format, speed up and simplify decompression	2019-04-24 09:47:40 +02:00
emmanuel-marty	593110ae5d	Fix parsing of -m option	2019-04-22 14:16:25 +02:00
emmanuel-marty	331d6f9911	Add --prefer-ratio, --prefer-speed, -m options	2019-04-21 09:41:12 +02:00
emmanuel-marty	f837ed096e	Add size-optimized Z80 decompressor, contributed by spke	2019-04-21 08:15:43 +02:00
emmanuel-marty	6c4a86c9fe	Make compression 5% faster	2019-04-20 16:24:54 +02:00
emmanuel-marty	fb79d319cb	Speed up portable decompressor a bit	2019-04-20 10:27:24 +02:00
emmanuel-marty	3e5639afaf	Reduce token count further	2019-04-20 10:26:45 +02:00
emmanuel-marty	88054841cf	Add strict block checks when decompressing, comparing	2019-04-20 10:26:13 +02:00
Emmanuel Marty	b3268b74eb	Update stats	2019-04-13 12:38:18 +02:00
emmanuel-marty	aa5dbe283d	Small optimization to the cost model	2019-04-13 12:33:39 +02:00
emmanuel-marty	4913fe5d48	Fix reporting of compressed size for raw mode	2019-04-13 12:33:25 +02:00
emmanuel-marty	cf51f1775a	Fix small literals cost estimate issue in optimizer, gain a small amount of compression and reduction of token count	2019-04-11 23:47:57 +02:00
emmanuel-marty	4c5d44fff4	Improve hotpath of 6502 depacker further	2019-04-10 19:41:41 +02:00
emmanuel-marty	2451d5802e	Fix typo in lzsa tool	2019-04-10 17:38:22 +02:00
emmanuel-marty	8c3fc6d652	Simplify short offset handling in 6502 depacker	2019-04-10 17:37:36 +02:00
emmanuel-marty	c220694531	Add 6502 decompressor	2019-04-10 17:30:24 +02:00
emmanuel-marty	02592cfe3b	Fix typo in 8088 decompressor comments	2019-04-10 17:30:13 +02:00
emmanuel-marty	953f2934a1	Merge branch 'master' of https://github.com/emmanuel-marty/lzsa	2019-04-08 09:44:19 +02:00
emmanuel-marty	9649073131	Speed up compression	2019-04-08 09:44:07 +02:00
Emmanuel Marty	061d24e49e	Update stats with results for compressor v0.5.0	2019-04-08 08:52:59 +02:00
emmanuel-marty	837b6895cf	Further reduce the number of tokens for even better decompression speed; increase compression slightly	2019-04-07 15:10:53 +02:00
emmanuel-marty	9c35d5115b	When verbose, display uncompressed bytes/token ratio	2019-04-07 15:10:17 +02:00
emmanuel-marty	be54a4f889	Check in optimized-for-speed Z80 decompressor contributed by spke	2019-04-07 00:01:42 +02:00
emmanuel-marty	6aa2dae4b3	Add context to libdivsufsort, don't allocate memory during compression	2019-04-07 00:01:22 +02:00
emmanuel-marty	e24320b23b	Save 1 byte in 8088 decompressor	2019-04-06 00:21:15 +02:00
emmanuel-marty	1353573af1	Small cleanup for end-of-data handling in decompression, check commands	2019-04-06 00:02:11 +02:00
emmanuel-marty	a785010448	Revert token to O|LLL|MMMM; revert to always shifting the match offset by 1; set raw block end marker as a large zero-size match	2019-04-05 23:16:05 +02:00
emmanuel-marty	06e6a14871	Add optimization pass to reduce the number of command tokens in the compressed data blocks without changing the compression ratio	2019-04-05 16:32:11 +02:00
emmanuel-marty	f05359b63d	Don't write an unnecessary footer byte when emitting a raw block	2019-04-05 12:13:51 +02:00
emmanuel-marty	1ef1ad8111	Reorganize token byte for faster decoding on 8-bit CPUs, without affecting the compression ratio	2019-04-05 11:58:44 +02:00
Emmanuel Marty	33b62c004a	Update format description	2019-04-05 10:46:24 +02:00
emmanuel-marty	c7692cf688	Store 16-bit lengths and match offsets directly, to simplify decompression on 8-bit CPUs without affecting the compression ratio	2019-04-05 10:42:06 +02:00
emmanuel-marty	bdc4e85948	Fix typos in format description	2019-04-05 09:28:28 +02:00
emmanuel-marty	c86d38ba63	Reduce the number of literals required at the end of a compressed block	2019-04-05 09:28:16 +02:00