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33 Commits

Author SHA1 Message Date
Vincent Rabaud
4f9f00ccf4 Use spatial predictors on top of palette no matter what. 
This is fixing another inefficiency found by the pingo image optimizer.

Change-Id: Icecb0d39fcbd17b403667e8e2095c7705b1dd493
 2020-06-04 18:03:57 +02:00
Vincent Rabaud
7658c68613 Add spatial prediction on top of palette in cruncher. 
Change-Id: I3765ab628ef915eedf2e541a80c65ce9880dff36
 2020-06-04 14:38:08 +02:00
Vincent Rabaud
f95a996c64 Simpler histogram clustering. 
Instead of re-organizing the list of histograms, set
the unused ones to NULL.

Change-Id: I8d25e1bb8f78ae9486ff358cc647ba1821cd5fcf
 2018-11-11 10:59:34 +01:00
Vincent Rabaud
6752904b2f Speed-up: Make sure we only initialize histograms when needed. 
Also, histograms in a HistogramSet can be initialized all
at once.

Change-Id: Ibbfa6034dce58dca8bb9113487e2ae507222ce7d
 2018-10-31 11:54:09 +00:00
Pascal Massimino
92dc0f0937 clean-up MakeInputImageCopy() 
use pointer increments.

Change-Id: I269412d41a58ab9ffd7fc0f3d479fe73a3d07b9e
 2018-10-02 14:46:35 +00:00
Pascal Massimino
994be82d00 Merge "Remove some very hard TODOs." 2018-04-03 14:10:50 +00:00
Vincent Rabaud
4033e1d70d Remove some very hard TODOs. 
Change-Id: I3d1b0072e0ac9125840fbbd76e91d151c82489ec
 2018-04-03 15:17:21 +02:00
Vlad Tsyrklevich
978eec2507 [CFI] Remove function pointer casts 
Control Flow Integrity [1] indirect call checking verifies that function
pointers only call valid functions with a matching type signature. This
change eliminates function pointer casts that were causing cfi-icall
failures.

[1] https://www.chromium.org/developers/testing/control-flow-integrity

BUG=chromium:827826

Change-Id: I5db021d06390a6cefd670fdd2f0d34c9e530465e
 2018-04-02 16:04:47 -07:00
Vincent Rabaud
551948e45f Remove unused argument in VP8LBitsEntropy. 
The function is only used once and does not use the extra argument.

Change-Id: I9735383784746cb02b5a643b7a4a2037f2874bf9
 2018-02-16 16:05:28 +01:00
James Zern
f4dd92565e remove WEBP_EXPERIMENTAL_FEATURES 
the webp bitstream is considered stable at this point

Change-Id: I4b13f9ed4c45f63785474b097e96cb7bf651be7b
 2018-02-09 10:25:11 -08:00
James Zern
083507f244 right-size some tables 
Change-Id: I5e894fd3f0f4b666512108495d8cecb34f65e119
 2017-11-23 08:40:58 +00:00
James Zern
f593d71a64 enc: disable pic->stats/extra_info w/WEBP_DISABLE_STATS 
Change-Id: I4ca3fa45710bd6bbe131b2ae047b1e268241657c
 2017-11-22 17:04:01 -08:00
Vincent Rabaud
c462cd0065 Remove useless code. 
The casts are to the same type and the #define not used.

Change-Id: I8d69c3b9dde7a1c53c2ba5a026a653d8c2e1d2a7
 2017-11-08 10:52:49 +01:00
James Zern
a439972175 WIP: list includes as descendants of the project dir 
#include "(.|..)/..." -> #include "src/..."

Change-Id: I772880aa097a770722043c8a4393552ba38a89b6
 2017-10-10 23:04:05 -07:00
Vincent Rabaud
a80fcc4ae1 ifdef code not used by Chrome/Android. 
Change-Id: Id086f6fd602b1fe3dc9034764b6a920a696ff1d2
 2017-08-31 14:02:05 +02:00
Vincent Rabaud
e132072f0b Re-use the transformed image when trying several LZ77 in lossless. 
Change-Id: If879b960131ba26859f8e4719a4c74cec1e0aaa8
 2017-06-19 17:30:01 +02:00
Pascal Massimino
f1d5a397db multithread cruncher: only copy stats when picture->stats != NULL 
BUG=webp:336

Change-Id: I6dfbbdcf61a6cb455f6cbf3dcd7f4c46578f42aa
 2017-06-14 21:49:13 +02:00
Vincent Rabaud
f8c2ac15af Multi-thread the lossless cruncher. 
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. 
Change-Id: Ie2bbfee0a8d154b58f4a3068f3f634b7dad4c12d
 2017-06-08 15:19:40 +02:00
Vincent Rabaud
a1779a017b Refactor LZ77 handling in preparation for a new method. 
Change-Id: If305c328c8f508bd778d1af108e4eb979fbd2eca
 2017-06-07 16:43:04 +02:00
Vincent Rabaud
9bbc0891c6 near lossless: fix unsigned int overflow warnings. 
Change-Id: Ic1111a66761b5821cbbea1c91b038b2327dd20b5
 2017-05-23 13:43:08 +02:00
Vincent Rabaud
e644c556c5 Fix bad bit writer initialization. 
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. 
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. 
Change-Id: I94a90220b5a175228fc48a4b299847b60cf5081b
 2017-04-25 19:04:52 +02:00
Vincent Rabaud
690efd82f8 Avoid several backward reference copies. 
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() 
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. 
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. 
Change-Id: I2be74b4d5fe48e059d5ced619d76fd030db79f74
 2017-02-28 11:43:13 +01:00
Vincent Rabaud
75a9c3c452 Improve compression by better entropy analysis. 
Change-Id: I6b56ca8d7d9a046a581baa0e85504136685d1161
 2017-02-27 21:58:22 +01:00
Vincent Rabaud
7d985bd1d0 Fix small entropy analysis bug. 
Change-Id: I70554b5a898b38930dfd03ca1ed78a075261e84b
 2017-02-24 13:38:41 +01:00
Vincent Rabaud
833c92198c More efficient stochastic histogram merge. 
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 
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 
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