819 Commits

Author SHA1 Message Date
James Zern
c184665ecd WebPPictureAllocARGB: align argb allocation
Change-Id: Ib390e8bbb97b38316a38af6a33e8a26bd050ee16
2017-11-16 20:19:09 -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
5cfb3b0f6c normalize include guards
some fell out of sync after:
668e1dd4 src/{dec,enc,utils}: give filenames a unique suffix

Change-Id: I280d3b3f44797f3bfb4835784add50a41cdd3793
2017-10-21 00:06:23 -07:00
Pascal Massimino
e51bdd439c remove unused VP8TokenToStats() function
BUG=webp:355

Change-Id: I0ad6f13003ef7201431c54c7db395254191de67c
2017-10-20 04:29:45 -07:00
Pascal Massimino
0a17f4712c Merge "WIP: list includes as descendants of the project dir" 2017-10-11 08:21:42 +00:00
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
e14ad93c0a Make sure we reach the full range for alpha blending.
255*255*257>>16 == 254 while we want 255.

BUG=webp:360

Change-Id: I2b9ac18f8802145f5a3d500c149ad9eceacbd75b
2017-10-05 16:53:57 +02:00
Vincent Rabaud
a80fcc4ae1 ifdef code not used by Chrome/Android.
Change-Id: Id086f6fd602b1fe3dc9034764b6a920a696ff1d2
2017-08-31 14:02:05 +02:00
Vincent Rabaud
3993af127e Fix signed integer overflows.
Change-Id: I62c9949f0edac58d69d991d6be5f85ae9e4d62a9
2017-08-31 11:56:42 +02:00
Vincent Rabaud
c5e34fba66 function definition cleanup
Change-Id: I1f6bb4405f09c0c863d0bd1c77340636abdbae69
2017-08-29 14:09:35 +02:00
Vincent Rabaud
289e62a313 Remove declaration of unimplemented VP8ApplyNearLosslessPredict
Change-Id: I1bebea099a06bccfdd103ba0557320d6ad68af38
2017-08-23 17:16:29 +02:00
Vincent Rabaud
24ad2e3c99 add const to two variables
Change-Id: I97374ccbf118baa59425346ffc439036a4482bf4
2017-08-07 23:02:15 +02:00
Pascal Massimino
46efe062b8 Merge "Allow the lossless cruncher to work for alpha." 2017-08-07 21:00:02 +00:00
Vincent Rabaud
8c3f9a4706 Speed-up LZ77.
No need to look for a bigger maximum reach if we reach the end
of the image.

Change-Id: I56b166f9266f15cdff5aa59a75559972db19858f
2017-08-07 21:01:27 +02:00
Vincent Rabaud
1aef4c710b Allow the lossless cruncher to work for alpha.
Change-Id: I7185e75404fae8c739e0536026f4687d25decad7
2017-08-07 20:58:05 +02:00
Vincent Rabaud
b8821dbd81 Improve the box LZ77 speed.
For a pixel, we look for the longest match starting in a window around it.
For the following pixel, the previous result can be used and smaller
search window is used.

Change-Id: Ice16f9a7c8754099d068380848f0d77de3f756ac
2017-08-06 20:15:20 +02:00
James Zern
88c73d8a7a backward_references_enc.h: fix WINDOW_SIZE_BITS check
this check was relocated in:
b903b80c Split cost-based backward references in its own file.

quiets -Wundef

Change-Id: I7f7a4773fb8cc77ca9f671b11f50d5db2275d415
2017-07-11 15:36:14 -07:00
hui su
7d67a1646d Lossy encoding: smoothen transparent areas to improve compression
If "exact" is false, we can modify the luma samples in fully transparent
areas to facilitate lossy compression. Experiments on some PNG images
show compression improvement of more than 20%.

Change-Id: I1a728cfa920a6652bc1f600d87c01f7f648c4942
2017-07-05 10:03:01 -07:00
James Zern
e50650c77f Merge "fix signature for DISABLE_TOKEN_BUFFER compilation" 2017-07-02 07:33:52 +00:00
Pascal Massimino
671d2567d4 fix signature for DISABLE_TOKEN_BUFFER compilation
Change-Id: Idb7aa2503c7870ef3b15a23325832428d47ae7c6
2017-07-01 14:46:28 -07:00
Vincent Rabaud
8acb4942f7 Remove the argb* files.
Half of the functionality was duplicated.
The rest is about the alpha channel handling so we
might as well put it in the appropriate file.

Change-Id: I8d5ef0afce82cc4842ab7132fd97995c42e6140a
2017-06-25 14:44:33 +02:00
Pascal Massimino
7b250459d6 Merge "Re-use the transformed image when trying several LZ77 in lossless." 2017-06-20 11:53:01 +00:00
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
Vincent Rabaud
5d7a50efee Get code to compile in C++.
Change-Id: I2f56e6b71e33ffecdba9e4fa9ef8f891c88f850f
2017-06-19 17:12:29 +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
f209a5481e Use the plane code and not the distance when computing statistics.
As backward references use the plane code when checking the cost
of a distance, statistics used to compute the cost should use it too.
This provides a small compression improvement at no speed cost.

Change-Id: Icade150929ee39ef6dc0d8b1fc85973086ecf41d
2017-06-01 17:08:43 +02:00
Vincent Rabaud
b903b80c30 Split cost-based backward references in its own file.
Change-Id: I4d8281e69b0e41f7c90337e5be70a6c65b044086
2017-06-01 16:22:31 +02:00
Vincent Rabaud
498cad34be Cosmetic changes in backward reference.
Change-Id: Ieb3dd65a647c034f67cf029e7b03f843b4650b0f
2017-06-01 14:20:16 +02:00
Vincent Rabaud
7caef29b86 Fix typo that creeped in.
Change-Id: I600725721d9df80d6deddc65e00663649a47c941
2017-05-23 17:10:34 +02:00
Vincent Rabaud
39e19f927c Merge "near lossless: fix unsigned int overflow warnings." 2017-05-23 14:47:47 +00:00
Vincent Rabaud
9bbc0891c6 near lossless: fix unsigned int overflow warnings.
Change-Id: Ic1111a66761b5821cbbea1c91b038b2327dd20b5
2017-05-23 13:43:08 +02:00
James Zern
b588729740 cosmetics,FindClosestDiscretized: use uint in mask creation
Change-Id: Ib1edd74be1c051c10cfe2defadbea48cabe15135
2017-05-22 08:21:44 -07:00
James Zern
f1784aee04 near_lossless,FindClosestDiscretized: use unsigned ops
quiets undefined sanitizer warnings of the form:
left shift of 128 by 24 places cannot be represented in type 'int'

Change-Id: I8a389f2ac9238513517180f302f759425eeb7262
2017-05-22 03:11:03 -07:00
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
Pascal Massimino
b62cdad287 Merge "Implement a cruncher for lossless at method 6." 2017-04-28 14:37:57 +00:00
skal
da3e4dfb6f use the exact constant for the gamma transfer function
As found in BT2020 reference:
https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.2020-2-201510-I!!PDF-E.pdf

The difference in output-size/PSNR are under the noise level.

Change-Id: I42c12000b61dca791226f3af772c5bd9d58201b8
2017-04-27 11:53:15 -07:00
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
James Zern
78fd199c3b backward_references_enc.c: clear -Wshadow warnings
index -> position

similar to: 2f5e8934 remove -Wshadow warnings

Change-Id: Ieaf8363d726a8fdf4e799845a81364e1dfae438a
2017-03-22 23:52:19 -07:00
Pascal Massimino
c08adb6fbc Merge "VP8LEnc: remove use of BitsLog2Ceiling()" 2017-03-20 13:12:19 +00:00
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
39eda6584f Remove a duplicated pixel hash implementation.
Change-Id: If0df61add2fdf404f9baf0820ca83faa50f2791c
2017-03-16 16:15:40 +01:00
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