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12 Commits

Author SHA1 Message Date
Pascal Massimino
0f027a72bf simplify smart RGB->YUV conversion code 
* use the same TFIX == YFIX precision (2bits)
* use int instead of float in LinearToGammaF()

output is visually equivalent. Code is a little faster.

Change-Id: Ie3cfebca351dbcbd924b3d00801d6523dca6981f
 2015-01-23 14:42:32 +01:00
Pascal Massimino
72d573f693 simplify the PackARGB signature 
Change-Id: I51570e362126b2681f93211a4f59a3fedb5fd4b5
 2015-01-05 02:10:04 -08:00
Pascal Massimino
1f4b8642e8 move VP8EncDspARGBInit() call closer to where it's needed 
Change-Id: I0d5121b456918f0ee6646903a8d71d4384deafe3
 2014-12-23 16:04:14 +01:00
Djordje Pesut
7ce8788b06 MIPS: dspr2: added optimization for function MakeARGB32 
inline function MakeARGB32 calls changed to call
via pointers to functions which make (a)rgb for
entire row

Change-Id: Ia4bd4be171a46c1e1821e408b073ff5791c587a9
 2014-12-22 12:31:36 +01:00
skal
c792d4129a Premultiply with alpha during U/V downsampling 
This prevents the 'alpha-leak' reported in issue #220

Speed-diff is kept minimal.

Change-Id: I1976de5e6de7cfcec89a54df9233c1a6586a5846
 2014-09-18 23:40:34 -07:00
skal
2523aa73cb SmartRGBYUV: fix odd-width problem with pixel replication 
rightmost pixel was missing a copy, which could lead to invalid read.

Also added a lower dimension of 4, below which we use the regular conversion.
This is to prevent corner cases, in addition to not being overkill.

Change-Id: Iac12e7a3d74590f12fe8eeb1830b9891e61439f6
 2014-08-18 15:58:36 -07:00
Pascal Massimino
ee52dc4e54 fix some MSVC64 warning about float conversion 
Change-Id: I27ab27fc15033d27d0505729f6275fb542c8d473
 2014-08-16 00:15:29 -07:00
skal
e2a83d7109 faster RGB->YUV conversion function (~7% speedup) 
with a special case for dithering==0., it gets somewhat faster on x86
thanks to inlining.

Also, less macros.

Change-Id: Ic2f2bf6718310743bb40cef2104fa759a073e6d5
 2014-08-15 11:13:25 -07:00
skal
3fc4c539aa Add smart RGB->YUV conversion option -pre 4 
New function: WebPPictureSmartARGBToYUVA()
This implement smart RGB->YUV conversion.

This is rather undocumented for now, and is triggered using '-pre 4'
preprocessing option.

This is slow-ish and use quite some memory, but should be improvable.
This is somehow a usable beta version.

Change-Id: Ia50a8c30134e4cab8a7d3eb70aef13ce1f6187a1
 2014-08-15 10:55:09 -07:00
Vikas Arora
d2cc61b7dd Extend MakeARGB32() to accept Alpha channel. 
Change-Id: I31b8e2d085000e2e3687a373401e4f655f11fc42
 2014-07-21 14:49:38 -07:00
Pascal Massimino
1549d62067 reorder the YUVA->ARGB and ARGB->YUVA functions correctly 
+ rework few loops
+ consolidate few error-checks / error-reporting
+ don't modify picture->colorspace in Import() for ARGB output

Change-Id: Iae6da9b50acc738c59b85c3ee64efbaf6af8bffc
 2014-07-18 07:15:54 -07:00
Pascal Massimino
736f2a175e extract colorspace code from picture.c into picture_csp.c 
had to refactor few functions here and there.

Change-Id: I86fde6fec7c2fc7eb48f0ecf327dbbd2bd40b9d4
 2014-07-16 16:37:26 -07:00