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13 Commits

Author SHA1 Message Date
James Zern
4339332038 enc/*: normalize WebPEncodingSetError() calls 
return WebPEncodingSetError() directly where possible (it returns 0 /
failure for convenience).

Change-Id: I89a937778886c15ecbbe078af5b4c8c89ef0f9af
 2023-06-21 16:43:00 -07:00
James Zern
287fdefe95 enc/*: add missing WebPEncodingSetError() calls 
Users of the encoder (including anim_encode.c) and areas of the encoder
itself rely on the status returned via WebPPicture.

Change-Id: Id786176b8ac3b2329d1e41b9dacbb8dcc5d822e4
 2023-06-21 16:43:00 -07:00
Vincent Rabaud
30453ea4e6 Add an internal WebPValidatePicture. 
Change-Id: Ia01bd3975f7bd0d47eb0a1764807baed16f0d268
 2022-05-16 17:37:20 +02:00
Skal
55a080e50a Add WebPReplaceTransparentPixels() in dsp 
with SSE2 implementation.

(Extracted from side experiment)

Change-Id: I62d457fb6643645291cffd6d2d205d4a5ffa4517
 2020-09-09 08:15:22 +02:00
Pascal Massimino
c2d04f3eb2 enable DC error-diffusion always for multi-pass 
We can't predict if the quality is going to be below the threshold
eventually, so we might as well enable it always.

Change-Id: I30aedecc8c6d4daf159f6ef152697df0206d1e93
 2017-12-12 15:00:45 +01:00
Pascal Massimino
96bf07c560 use DC error diffusion for U/V at low-quality 
This fixes some color smearing due to heavy quantization.
This is only enabled for q <= 30 (cf ERROR_DIFFUSION_QUALITY)

Change-Id: I07e83a4d38461357a32c9e214f7eadc6db73baa9
 2017-12-11 06:37:40 -08:00
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
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
Pascal Massimino
4689ce1635 cwebp: add a -sharp_yuv option for 'sharp' RGB->YUV conversion 
Change-Id: I6edd5b44d693da50f702fa8218f14872874d91ba
 2017-01-20 16:54:54 +01:00
Pascal Massimino
79bf46f120 rename the pretentious SmartYUV into SharpYUV 
Change-Id: Ifeeb9cb85896c5f3ba0cc1c2c821f8d00295f69e
 2017-01-20 14:36:21 +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