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316 Commits

Author SHA1 Message Date
James Zern
992187a380 improve log2 test 
- add check for native log2 to configure
- use a common define (NOT_HAVE_LOG2) to enable use of local library
  version for non-autoconf platforms without their own version,
  currently msvc and android

This uses a negative (NOT_HAVE_) to simplify the ifdef

Change-Id: Id0610eed507f8bb9c5da338918112853d5c8127a
 2012-01-04 18:49:37 -08:00
Pascal Massimino
a90cb2be6e reduce number of copies and mallocs in alpha plane enc/dec 
Change-Id: Ice48d2dd403c18870567ee6e1b210b1eb3d5b44f
 2011-12-23 01:21:53 -08:00
James Zern
b1662b0530 fix some more type conversion warnings w/MSVC 
API & memory related warnings will be dealt with separately

Change-Id: I8a7893baa4d5035c963fb3c16e0bb4eee742e968
 2011-12-21 16:07:16 -08:00
James Zern
948d4fe94f silence a msvc build warning 
implicit double -> float conversion; avoiding sqrtf (c99) for
compatibility

Change-Id: If9b367dde237fc5173c1445cc60b16aa6ad2821c
 2011-12-19 23:04:01 -08:00
Pascal Massimino
6aac1df17b add a bunch of missing 'extern "C"' 
Change-Id: I8c0ada049ce9fa7ef14164b90d58e999cdabba53
 2011-12-13 10:51:32 -08:00
Pascal Massimino
08e865822a trap alpha-decoding error 
Improves robustness to bad bitstream.

Change-Id: I87ca03ccd12d4d690904b35f8dfc2a20a28fb47b
 2011-12-08 06:34:00 -08:00
Pascal Massimino
b361eca1c5 add cut-off to arith coder probability update. 
This speeds things up for long message, while not damaging
the stats too much for usual-sized cases

Change-Id: I3f45e28b771d701e2e1da11eb800de18c4ed12fc
 2011-12-08 06:27:11 -08:00
Pascal Massimino
30971c9e95 Implement progress report (and user abort) 
New cwebp flag is -progress

Change-Id: Ied872cca13f512036860783bbee1bdbccad72768
 2011-12-01 14:19:40 -08:00
James Zern
67228734dc cosmetics after e1947a9 
indent / spelling / line length & a couple missing consts

Change-Id: Id282cb7bc6881d4738a3d9fa912b5b22a007c4d2
 2011-11-30 18:51:20 -08:00
Vikas Arora
e1947a9299 Add Alpha encode/decode code. 
Add code for Alpha encoding & decoding. The alpha compression is done
via backward reference counts encoded with Arithmetic encoder (TCoder).
Also provided is lossy Alpha pre-processing option via level-quantizations
using kNN heuristic.

Change-Id: Ib6b13530c1a4ab6493edcb586ad29fe242bc1766
 2011-11-30 17:53:09 +05:30
James Zern
469d6eb974 Merge "Makefile.am: remove redundant noinst_HEADERS" 2011-11-16 18:41:55 -08:00
James Zern
ced3e3f4e0 Makefile.am: remove redundant noinst_HEADERS 
When they appear in _SOURCES they won't be installed [1].

[1]: http://www.gnu.org/software/automake/manual/automake.html#Headers

Change-Id: I14fd816294682e7bd0fccefd6428e1526c9470d8
 2011-11-11 16:29:32 -08:00
James Zern
964387ed19 use WEBP_INLINE for inline function declarations 
removes a #define inline, objectionable in certain projects

Change-Id: Iebe0ce0b25a030756304d402679ef769e5f854d1
 2011-11-11 10:53:58 -08:00
James Zern
fdbe02c581 windows: match _cond_destroy logic w/return variable name 
CloseHandle returns non-zero on success so earlier versions would leave
'ok' with a misleading value, though the return itself was correct.

Change-Id: I21b74a59d90f7bf1b484a55f3960962e933f577b
 2011-09-13 15:48:33 -07:00
Pascal Massimino
6a32a0f5bf make VP8BitReader a typedef, for better re-use 
Change-Id: Id91f8c5649f9fd078facc9f280a314377193b5e8
 2011-09-13 15:47:24 -07:00
Pascal Massimino
b112e83647 create a libwebputils under src/utils 
with bit_reader bit_writer and thread for now.

Change-Id: If961933fcfc43e60220913fe4d527230ba8f46bb
 2011-09-13 15:34:15 -07:00