Vincent Rabaud
e132072f0b
Re-use the transformed image when trying several LZ77 in lossless.
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Change-Id: If879b960131ba26859f8e4719a4c74cec1e0aaa8
2017-06-19 17:30:01 +02:00
Pascal Massimino
f1d5a397db
multithread cruncher: only copy stats when picture->stats != NULL
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BUG=webp:336
Change-Id: I6dfbbdcf61a6cb455f6cbf3dcd7f4c46578f42aa
2017-06-14 21:49:13 +02:00
Vincent Rabaud
f8c2ac15af
Multi-thread the lossless cruncher.
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BUG=webp:336
Change-Id: I8e861d6a61d51a5cdc4bbd00cd4f17d4ff006d2f
2017-06-14 16:50:36 +02:00
Vincent Rabaud
355c3d1bc7
Integrate a new LZ77 looking for matches in the neighborhood of a pixel only.
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Change-Id: Ie2bbfee0a8d154b58f4a3068f3f634b7dad4c12d
2017-06-08 15:19:40 +02:00
Vincent Rabaud
a1779a017b
Refactor LZ77 handling in preparation for a new method.
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Change-Id: If305c328c8f508bd778d1af108e4eb979fbd2eca
2017-06-07 16:43:04 +02:00
Vincent Rabaud
9bbc0891c6
near lossless: fix unsigned int overflow warnings.
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Change-Id: Ic1111a66761b5821cbbea1c91b038b2327dd20b5
2017-05-23 13:43:08 +02:00
Vincent Rabaud
e644c556c5
Fix bad bit writer initialization.
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When re-initializing a bit writer, we could set invalid values because
the bit writer was not big enough.
Change-Id: Id25ab6712603245a5a12d5f4a86fe35a9a799a5d
2017-05-02 18:59:01 +02:00
Vincent Rabaud
adab8ce020
Implement a cruncher for lossless at method 6.
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Go over the whole compression step for each of the
transforms and pick the best one.
Change-Id: I3a1b1458348c468558be0fcf491038a5724c9364
2017-04-27 18:16:04 +02:00
Vincent Rabaud
0dcd85b6c4
Fix VP8ApplyNearLossless to respect const and stride.
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Change-Id: I94a90220b5a175228fc48a4b299847b60cf5081b
2017-04-25 19:04:52 +02:00
Vincent Rabaud
690efd82f8
Avoid several backward reference copies.
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An extra VP8LBackwardRefs struct is used but it was used internally anyway.
Change-Id: Ifcb36ce42b8c21ef3c7a1daf38cb7f714687fcb2
2017-04-14 15:34:50 +02:00
Pascal Massimino
28c37ebd5a
VP8LEnc: remove use of BitsLog2Ceiling()
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was only used once. Better fall back for Log2Floor.
Change-Id: Ibcc26505440971bffe62ba6aca3d179ca85791d4
2017-03-20 02:58:16 -07:00
Vincent Rabaud
6f75a51b58
Analyze the transform entropy on the whole image.
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The first column was skipped before.
Change-Id: I11521a6a48288d771e8fb83869fda08753f0fbcb
2017-02-28 15:48:59 +01:00
Vincent Rabaud
a5e4e3aff1
Use palette only if we can in entropy analysis.
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Change-Id: I2be74b4d5fe48e059d5ced619d76fd030db79f74
2017-02-28 11:43:13 +01:00
Vincent Rabaud
75a9c3c452
Improve compression by better entropy analysis.
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Change-Id: I6b56ca8d7d9a046a581baa0e85504136685d1161
2017-02-27 21:58:22 +01:00
Vincent Rabaud
7d985bd1d0
Fix small entropy analysis bug.
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Change-Id: I70554b5a898b38930dfd03ca1ed78a075261e84b
2017-02-24 13:38:41 +01:00
Vincent Rabaud
833c92198c
More efficient stochastic histogram merge.
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Between each iteration we keep track of the previously found
potential merge hence less work to do.
Change-Id: I2b6237447e79443516a6111727d96c24f10bd98a
2017-02-23 14:35:33 +01:00
Pascal Massimino
eb1dc89a5f
silently expose use_delta_palette in the WebPConfig API
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is just a placeholder for now, unless WEBP_USE_EXPERIMENTAL_FEATURES
is defined.
Change-Id: I087cb49781560bc1a7fbb01b136d36115c97ef72
2017-01-20 10:25:19 +01:00
James Zern
668e1dd44f
src/{dec,enc,utils}: give filenames a unique suffix
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this avoids duplicates between these trees and dsp/, e.g., enc/tree.c,
dec/tree.c, making pulling the whole library source tree into one target
possible
BUG=webp:279
Change-Id: I060a614833c7c24ddd37bf641702ae6a5eef1775
2017-01-19 19:09:48 -08:00
