Peter Helcmanovsky (Ped)
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db1c7d2d14
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z80_unpacker: optimisation: -1B in decode_number (fwd 171B / rev 168B)
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2022-09-19 11:49:53 +02:00 |
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Peter Helcmanovsky (Ped)
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c1ffd0e7ed
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z80_unpacker: attempt for faster decode_number (+6B, ~1% faster) => not good
archived in comments for future reference
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2022-09-19 11:42:56 +02:00 |
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Peter Helcmanovsky (Ped)
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00d084105a
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z80_unpacker: optimisation: -2B in backward unpack (fwd 172B / rev 169B)
backward was already -1B, so now the total difference is -3B.
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2022-09-19 01:31:22 +02:00 |
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Peter Helcmanovsky (Ped)
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8e5298caee
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z80_unpacker: optimisation: -1B in decode_number = 172B (but +4T per length)
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2022-09-19 01:09:21 +02:00 |
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Peter Helcmanovsky (Ped)
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1fb29f3a1b
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z80_unpacker: optimisation: -1B and -1T in decode_bit = 173B
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2022-09-18 23:44:18 +02:00 |
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c8924456aa
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-r reverses both input and output
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2022-09-18 23:38:41 +02:00 |
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7b0e22f459
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Merge pull request #3 from ped7g/z80_ped7g
backward unpacker + example extended
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2022-09-18 23:24:28 +02:00 |
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Peter Helcmanovsky (Ped)
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165f593a11
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z80_unpacker: (codestyle) whitespace + temporary label rename
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2022-09-18 23:04:37 +02:00 |
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Peter Helcmanovsky (Ped)
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d4bce4bf7c
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z80_unpacker: optimisation: -3B and ~-10T in decode_bit = 174B
unpack zx48.rom is now ~22.6s (from 23.0s)
(performance version is now 199 bytes, zx48.rom unpack 19.4s -> 19.0s)
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2022-09-18 22:54:10 +02:00 |
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Peter Helcmanovsky (Ped)
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b13fa05413
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z80_unpacker: add backward variant of unpacker + example extended
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2022-09-18 00:23:14 +02:00 |
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Peter Helcmanovsky (Ped)
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3c773aca8d
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z80_unpacker: add performance variant of depacker
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2022-09-16 03:38:03 +02:00 |
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a5406deb30
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Merge pull request #2 from ped7g/z80_ped7g
Z80 ped7g - few more optimisations for current variant of packer
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2022-09-16 00:26:55 +02:00 |
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Peter Helcmanovsky (Ped)
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9211544cb9
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z80_unpacker: add resulting snapshot file to example
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2022-09-15 18:37:06 +02:00 |
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Peter Helcmanovsky (Ped)
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3fa9e0fa12
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z80_unpacker: optimisations: 0B, -13T in decode_bit (stays 177B)
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2022-09-15 18:22:33 +02:00 |
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Peter Helcmanovsky (Ped)
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aa3fad4d80
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z80_unpacker: optimisations: -3B and ~-24T in decode_bit = 177B
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2022-09-15 18:22:32 +02:00 |
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Peter Helcmanovsky (Ped)
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6624940ed9
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z80_unpacker: optimisations: -2B and -27T in decode_bit = 180B
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2022-09-15 18:22:32 +02:00 |
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Peter Helcmanovsky (Ped)
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c3a9773e5c
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z80_unpacker: optimisations: -1B in unpack implementation = 182B
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2022-09-15 18:22:31 +02:00 |
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Peter Helcmanovsky (Ped)
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a75a35efb2
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z80_unpacker: probs context-size for offset/length numbers as EQU
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2022-09-15 18:22:27 +02:00 |
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540a91d1ba
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forgot to add back -l 9
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2022-09-15 00:18:30 +02:00 |
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e7aaf1491a
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add old-prob-update to compare script, add reverse option
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2022-09-14 23:51:38 +02:00 |
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a1dabaf7f9
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add simple script to compare compression of variants
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2022-09-14 23:41:14 +02:00 |
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75e375fb1f
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Merge branch 'ped7g-z80_ped7g' into z80
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2022-09-14 09:03:28 +02:00 |
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Peter Helcmanovsky (Ped)
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c7ea11bce3
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z80_unpacker: optimisations: -2B in unpack implementation = 183B
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2022-09-14 01:44:04 +02:00 |
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Peter Helcmanovsky (Ped)
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02d20867ee
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z80_unpacker: optimisations: -2B in unpack implementation = 185B
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2022-09-14 01:01:56 +02:00 |
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Peter Helcmanovsky (Ped)
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511ddefc08
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z80_unpacker: optimisations: -4T per offset/length bit decoded
making the 256-alignment of probs array even more baked-in, but there
was no real chance to get rid of that any way
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2022-09-14 00:01:51 +02:00 |
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Peter Helcmanovsky (Ped)
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d30baaa91f
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z80_unpacker: optimisations: -1B by keeping write_ptr in DE'
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2022-09-13 23:57:59 +02:00 |
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Peter Helcmanovsky (Ped)
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919a892ef0
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z80_unpacker: optimisations: -1B by decode_length returning CF=0
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2022-09-13 23:25:03 +02:00 |
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Peter Helcmanovsky (Ped)
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ea5c0b1b15
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z80_unpacker: optimisations: shorter >>4 in probs update
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2022-09-13 23:15:18 +02:00 |
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Peter Helcmanovsky (Ped)
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a19ec2abb7
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z80_unpacker: optimisations: remove .offset init
first offset is mandatory in packed data
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2022-09-13 22:53:15 +02:00 |
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Peter Helcmanovsky (Ped)
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7b051113e1
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z80_unpacker: initial working version with screen-slideshow example
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2022-09-13 22:12:03 +02:00 |
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f1f1c64a76
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implement simplified prob update, update unpack.c
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2022-09-10 12:01:42 +02:00 |
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36cb6d77b5
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BE bitstream, flip bit encoding
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2022-09-10 11:31:09 +02:00 |
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629c5fce7d
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optimize c_unpacker state update a bit, add -b flag to --help
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2022-09-09 19:10:31 +02:00 |
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a205473ad6
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slight optimization
v0.1.0
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2022-09-09 08:32:03 +02:00 |
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4903ac3786
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c unpacker now works
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2022-09-09 00:47:33 +02:00 |
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f817dc9254
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first try of c decompressor, not working yet
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2022-09-08 23:42:03 +02:00 |
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d93aec186c
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add compressed_size function
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2022-06-19 23:08:47 +02:00 |
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3902425922
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add bitstream variant, could be useful on 8bit platforms
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2021-12-28 23:59:56 +01:00 |
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2e7983fc65
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use u8 context entries
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2021-12-27 22:35:53 +01:00 |
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f7f891e154
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fix creating broken files if they end with a match
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2021-12-27 22:34:14 +01:00 |
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08c86af06f
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some slight tweaks to the compressed format
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2021-12-27 16:58:39 +01:00 |
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7d280bd533
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unify interface, only one pack function now
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2021-11-26 21:58:28 +01:00 |
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c0560f99a8
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add compression levels
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2021-11-26 00:01:33 +01:00 |
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5fedc032a9
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speed optimizations + progress bar
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2021-11-25 22:43:39 +01:00 |
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5e82c65c18
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a few speed and/or compression ratio improvements
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2021-11-24 22:35:24 +01:00 |
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11b43f9bc4
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implement parsing packer + fix huge bug in match finder
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2021-11-24 09:28:18 +01:00 |
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470b778340
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change entropy coder from Range to rANS
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2021-11-22 23:14:24 +01:00 |
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479a2e2c89
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make packer usable as lib
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2021-11-20 16:27:35 +01:00 |
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8f23ec711f
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first version, only very simple greedy packer
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2021-11-19 21:40:37 +01:00 |
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