dany/libwebp
1
0
Fork 0
mirror of https://github.com/webmproject/libwebp.git synced 2024-12-29 06:58:21 +01:00
Code Issues Actions Packages Projects Releases Wiki Activity
72831f6b28
libwebp/src/enc
History
Vikas Arora 72831f6b28 Speedup AnalyzeAndInit for low effort compression. 
AnalyzeSubtractGreen constitutes about 8-10% of the comression CPU cycles.
Statistically, subtract-green is proved to be useful for most of the
non-palette compression. So instead of evaluating the entropy (by calling
AnalyzeSubtractGreen) apply subtract-green transform for the low-effort
compression.

This changes speeds up the compression at m=0 by 8-10% (with very slight loss
of 0.07% in the compression density).

Change-Id: I9797dc39437ae089716acb14631bbc77d367acf4
2015-01-30 10:37:31 -08:00
..
alpha.c Temporarily disable encoding of alpha plane with color cache. 2015-01-28 15:28:02 -08:00
analysis.c simplify the Histogram struct, to only store max_value and last_nz 2014-12-10 10:44:57 +01:00
backward_references.c Simplify backward refs calculation for low-effort. 2015-01-27 09:36:14 -08:00
backward_references.h Simplify backward refs calculation for low-effort. 2015-01-27 09:36:14 -08:00
config.c Add smart RGB->YUV conversion option -pre 4 2014-08-15 10:55:09 -07:00
cost.c remove the special casing for res->first in VP8SetResidualCoeffs 2014-06-08 06:40:22 +02:00
cost.h cosmetics: remove some extraneous 'extern's 2014-08-05 22:14:24 -07:00
filter.c use decoder's DSP functions for autofilter 2014-05-20 14:55:05 -07:00
frame.c cosmetics 2014-08-06 12:10:59 -07:00
histogram.c Speedup VP8LGetHistoImageSymbols for low effort (m=0) mode. 2015-01-08 00:29:57 -08:00
histogram.h Speedup VP8LGetHistoImageSymbols for low effort (m=0) mode. 2015-01-08 00:29:57 -08:00
iterator.c drop: ifdef __cplusplus checks from C files 2013-12-13 11:42:13 -08:00
Makefile.am add -near_lossless [0..100] experimental option 2014-08-05 19:17:10 +02:00
near_lossless.c Enable Near-lossless feature. 2015-01-29 16:10:20 -08:00
picture_csp.c simplify smart RGB->YUV conversion code 2015-01-23 14:42:32 +01:00
picture_psnr.c split monolithic picture.c into picture_{tools,psnr,rescale}.c 2014-07-12 09:13:33 -07:00
picture_rescale.c extract colorspace code from picture.c into picture_csp.c 2014-07-16 16:37:26 -07:00
picture_tools.c extract colorspace code from picture.c into picture_csp.c 2014-07-16 16:37:26 -07:00
picture.c move VP8EncDspARGBInit() call closer to where it's needed 2014-12-23 16:04:14 +01:00
quant.c PickBestUV: fix VP8Copy16x8 invocation 2014-12-04 23:12:30 -08:00
syntax.c Unify the API between VP8BitWriter and VP8LBitWriter 2014-10-23 15:35:16 +02:00
token.c make error-code reporting consistent upon malloc failure 2014-06-13 08:45:12 +02:00
tree.c Unify the API between VP8BitWriter and VP8LBitWriter 2014-10-23 15:35:16 +02:00
vp8enci.h simplify the Histogram struct, to only store max_value and last_nz 2014-12-10 10:44:57 +01:00
vp8l.c Speedup AnalyzeAndInit for low effort compression. 2015-01-30 10:37:31 -08:00
vp8li.h Temporarily disable encoding of alpha plane with color cache. 2015-01-28 15:28:02 -08:00
webpenc.c WebPEncode: Support encoding same pic twice (even if modified) 2014-11-06 13:52:48 -08:00