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Author SHA1 Message Date
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
Urvang Joshi
0cc811d7d6 gif2webp: Background color correction 
For some GIF images, the first frame is missing the corresponding
graphic control extension. For such cases, we were never calling
GetBackgroundColor(), and default background color value (white) was being used
incorrectly.
So, we call GetBackgroundColor() when we encounter the first image
descriptor instead, to make sure that it is always called.

Change-Id: I00fc8e943d8a0c1578dcd718f3e74dec7de4ed61
 2014-09-18 15:07:28 -07:00
Pascal Massimino
d7167ff7ce Amend the lossless spec according to issue #205, #206 and #224 
http://code.google.com/p/webp/issues/detail?id=205 <- Select()
http://code.google.com/p/webp/issues/detail?id=206 <- out-of-bound colormap index
http://code.google.com/p/webp/issues/detail?id=224 <- version number MUST be 0

Change-Id: I56a575529862dfc8ad189ddcfc47ef59a58f273d
 2014-09-18 08:21:02 +02:00
Vikas Arora
b901416b90 Record the lossless size stats. 
Record and show the lossless header and image data sizes in the cwebp.

Change-Id: I08f19693cb7a756b6fdce5b55d71f5367b5f02fc
 2014-09-17 15:16:05 -07:00
Pascal Massimino
cddd334050 Add a WebPExtractAlpha function to dsp 
This is the opposite of WebPDispatchAlpha

+ Implement the SSE2 version

Change-Id: I0c297309255f508c5261da8aad01f7e57f924d6c
 2014-09-15 08:12:03 +02:00
Pascal Massimino
0716a98eb3 fix indent after I0204949917836f74c0eb4ba5a7f4052a4797833b 
Change-Id: I5d9e5d0a2ad2cefd8c539571d2eaee948da60ad5
 2014-09-12 19:59:53 +02:00
Vikas Arora
f9ced95a9b Optimize lossless decoding for trivial(ARB) codes. 
Optimize the decoding for region that have trivial literal codes.
The trivial literal is defined as huffman image with Red, Blue and Alpha
huffman trees with only single code values.
This speeds up lossless decoding by 3%

Change-Id: I0204949917836f74c0eb4ba5a7f4052a4797833b
 2014-09-12 09:08:08 -07:00
James Zern
924fcfd900 Merge "webpmux: simplify InitializeConfig()" 2014-09-12 00:43:06 -07:00
James Zern
c0a462cac2 webpmux: simplify InitializeConfig() 
put WebPMuxConfig on the stack in main() rather than allocating it in
InitializeConfig(); removes a level of indirection there.

Change-Id: I81d386f7472ebbd322dd3fdbfda9d78dbeb62a66
 2014-09-12 00:23:06 -07:00
James Zern
6986bb5e12 webpmux: fix indent 
+ remove unnecessary cast

Change-Id: I2070fbe6aeda49f5790c69390e5b539a2c1a5616
 2014-09-12 00:11:56 -07:00
James Zern
f89e1690df webpmux: fix exit status on numeric value parse error 
in most cases 'ok' is set via a goto macro

Change-Id: I17c832446bf3e716d3bcd323dbcc72bec544029c
 2014-09-12 00:10:09 -07:00
pascal massimino
2172cb626a Merge "webpmux: fix loop_count range check" 2014-09-11 23:02:37 -07:00
pascal massimino
e3b343ece7 Merge "examples: warn on invalid numeric parameters" 2014-09-11 23:02:18 -07:00
James Zern
0e23c487da webpmux: fix loop_count range check 
explicitly check [0, 65535], the use of 'long' was removed in a prior
commit

Change-Id: I70d5bf286908459b5d4d619c657853f0e833b6ea
 2014-09-11 15:26:11 -07:00
Pascal Massimino
6208338a6c Merge "fix loop bug in DispatchAlpha()" 2014-09-11 14:48:19 -07:00
Urvang Joshi
d51f3e4069 gif2webp: Handle frames with missing graphic control extension 
According to the GIF spec (http://www.w3.org/Graphics/GIF/spec-gif89a.txt),
this block is optional, and its scope is only the first graphic rendering block
that follows.

The spec doesn't mention what default values of frame dimensions, offsets,
duration and transparent index to use in such a case, though. So, we use the
defaults used by GIF reader in Chromium:
https://code.google.com/p/chromium/codesearch#chromium/src/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h&l=186

Change-Id: Iecc6967847192483770e85ac15fe2835cd01ce7b
 2014-09-11 14:35:21 -07:00
Pascal Massimino
690b491af1 fix loop bug in DispatchAlpha() 
* We were re-doing most of the work in plain-C as 'left-over'.
* we were always returning has_alpha = true because of a bad mask all_0xff

These bugs were conservative and silent, in the sense that we were 'just' doing
more work than necessary.

Now, the SSE2 version is really 2x faster than the C version.

Change-Id: I6c8132a267fe3c7a3d1fa70e7a5fcd10719543fa
 2014-09-11 22:35:08 +02:00
James Zern
96d43a873a examples: warn on invalid numeric parameters 
add ExUtilGet[U]Int / ExUtilGetFloat which print an error message on
parse failure.
fixes issue #219.

Change-Id: Ie537f5aebd138925bf1a48289b6b5e261b3af2ca
 2014-09-11 11:18:28 -07:00
Djordje Pesut
3101f53720 MIPS: dspr2: added optimization for TransformOne 
added macros for TransformOne, TransformAC3 and TransfromDC

Change-Id: I4341450f443cf46dcf91c0db17bde63c8fb8afee
 2014-09-11 17:02:02 +02:00
Pascal Massimino
a6bb9b17d8 SSE2 for inverse Mult(ARGB)Row and ApplyAlphaMultiply 
Change-Id: Iab5c0e4a4d2b31f86736a9b277e62b6e28c3d2b4
WebPMultRow: ~7x faster
WebPMultARGBRow: ~3x faster
ApplyAlphaMultiply: 60% faster
 2014-09-11 07:58:42 +02:00
Vikas Arora
d84a8ffdf7 Remove default initialization of decoder status. 
emove the default initialization of decoder status in the method
VP8LDecodeImage().

Change-Id: Ie6b949606349f4e937c4c1dd2c02ff2a4f86870f
 2014-09-10 14:55:46 -07:00
James Zern
be70b86c57 configure: simplify libpng-config invocation 
use --ldflags over --prefix + --libs combination

based on comment in issue #180.

Change-Id: If2ca06053d5237b6722ddf4117917e5f3c06ab59
 2014-09-09 22:57:39 -07:00
Vikas Arora
e0a9932161 Rectify bug in lossless incremental decoding. 
Handle the corner case when VP8LDecodeImage() method is called with an invalid
header data. The lossless decoding doesn't support incremental mode yet.
Return the error status as BITSTREAM error in case not all pixels are decoded
with the provided bit-stream. Also added asserts in the VP8LDecodeImage() method
to validate the decoder header with appropriate/valid data for huffman trees
(htree_groups_ etc).

Change-Id: Ibac9fcfc4bd0a2c5f624bb9d4a2b9f6459aa19ea
 2014-09-09 15:34:16 -07:00
Djordje Pesut
e2502a97c1 MIPS: dspr2: added optimization for TransformAC3 
Change-Id: Icd789ee5f6d764297e7dc0a0f8a3bc47ab92ac65
 2014-09-09 14:53:36 +02:00
Djordje Pesut
24e1072aac MIPS: dspr2: added optimization for TransformDC 
Change-Id: Iee69758f6442ea9c80ddaa32cea8d00dda4c6252
 2014-09-09 14:15:04 +02:00
Pascal Massimino
c0e84df8e8 Merge "Slightly faster lossless decoding (1%)" 2014-09-09 03:55:00 -07:00
Pascal Massimino
8dd28bb560 Slightly faster lossless decoding (1%) 
-> introduce special case 64b pattern-copy, similar to the 8b one for alpha.
-> use mempcy() for non-overlapping areas
+ cosmetics and homogenezation of the code

Change-Id: I0e65e04b96fec94c009a4614137dfba2a0f98561
 2014-09-09 11:18:30 +02:00
Djordje Pesut
f0103595dd MIPS: dspr2: added optimization for ColorIndexInverseTransforms 
Change-Id: I5b6094ce489d4f896bc4b8f575142eb3c5054beb
 2014-09-08 17:22:59 +02:00
Pascal Massimino
d3242aee16 make VP8LSetBitPos() set br->eos_ flag 
ReadSymbol() finishes with a VP8LSetBitPos() call only and could miss an eos_ during the decode loop.

Things are faster because of inlining too.

Change-Id: I2d2a275f38834ba005bc767d45c5de72d032103e
 2014-09-06 08:40:20 +02:00
Pascal Massimino
a9decb5584 Lossless decoding: fix eos_ flag condition 
eos_ needs to be set only when superfluous bits have actually
been requested.
Earlier, we were assuming pre-mature end-of-stream to be an error.
Now, more precisely, we mark error when we have encountered end-of-stream *and*
we attempt to read more bits after that.

This handles cases where image data requires no bits to be read

Change-Id: I628e2c39c64f10c443fb51f86b1f5919cc9fd299
 2014-09-05 20:21:50 +02:00
Pascal Massimino
3fea6a28da fix erroneous dec->status_ setting 
We only need to set BITSTREAM_ERROR if !ok.

Change-Id: I5bd13e64797e8bc509477edb29158abb39cb0ee1
 2014-09-05 19:48:11 +02:00
Djordje Pesut
80b8099fd8 MIPS: dspr2: add some specific mips code to commit I2c3f2b12f8df15b785fad5a9c56316e954ae0c53 
added some C-code tuning also

Change-Id: I67ce70a063ef6b5821b9158a4defd6987eccbb9a
 2014-09-04 13:42:39 +02:00
skal
e564062522 Merge "further refine the COPY_PATTERN optim for DecodeAlpha" 2014-09-04 03:43:55 -07:00
James Zern
854509fec0 enc/histogram.c: reindent after f4059d0 
fixes indent in HistogramRemap after:
f4059d0 Code cleanup for HistogramRemap.

Change-Id: I9f53a088749e9100a70331bda1662488666c5156
 2014-09-03 16:58:49 -07:00
skal
344219645b Merge "~3-5% faster encoding optimizing PickBestIntra*()" 2014-09-03 15:53:32 -07:00
skal
865069c12e further refine the COPY_PATTERN optim for DecodeAlpha 
* use functions instead of MACRO
* adjust var's name

Overall, same speed, with more readible code

Change-Id: I2c3f2b12f8df15b785fad5a9c56316e954ae0c53
 2014-09-04 00:25:27 +02:00
Djordje Pesut
a59562283f added C-level optimization for DecodeAlphaData function 
Copies with short distances of 1,2 and 4 are specialized.

up to 10-14% faster alpha decoding.

Change-Id: I9708e98193910bfaf8ef43091f3fdea73b63896d
 2014-09-03 16:49:17 +02:00
skal
187d379db6 add a fallback to ALPHA_NO_COMPRESSION 
if ALPHA_LOSSLESS_COMPRESSION produces a too big file (very rare!),
we fall-back to no-compression automatically.

Change-Id: I5f3f509c635ce43a5e7c23f5d0f0c8329a5f24b7
 2014-09-02 21:55:13 +02:00
skal
a48a2d7635 ~3-5% faster encoding optimizing PickBestIntra*() 
* Add early-out check for Intra16
* replace some memcpy() by pointer swap

Change-Id: I5edc5f7fbc8e39984deb48e6c045c97c61418589
 2014-09-01 14:40:25 +02:00
James Zern
a6140194ff ExUtilReadFromStdin: (windows) open stdin in bin mode 
fixes input/decode from stdin in the examples

Change-Id: Ie8052da758a9ef64477501b709408236d258da82
 2014-08-29 19:25:46 -07:00
James Zern
e80eab1fbc webpmux: (windows) open stdout in binary mode 
prevents corrupt output. related to issue #217

Change-Id: I6f0dac8131127717ba72b0709fb35d421ab41acb
 2014-08-29 19:25:45 -07:00
James Zern
e9bfb1166d cwebp: (windows) open stdout in binary mode 
prevents corrupt output. fixes issue #217

Change-Id: If90afb441636144300da66d64f0e7f78505b4060
 2014-08-29 19:11:41 -07:00
James Zern
5927e15bc7 example_util: add ExUtilSetBinaryMode 
use it in dwebp when dealing with 'stdout'

Change-Id: I8b8a0b0de9e73731e913ac3c83b5e2b33c693175
 2014-08-29 19:07:17 -07:00
Urvang Joshi
30f3b75b33 webpmux man page: Clarify some title, descriptions and examples 
Based on the feedback here:
https://groups.google.com/a/webmproject.org/d/msg/webp-discuss/qY6rWJLqRTY/pF8oSj8DOGYJ

Change-Id: I9119ea8e211ffb269026010e3c590385bc6a9f17
 2014-08-29 14:30:53 -07:00
skal
77d4c7e337 address cosmetic comments from patch #71380 
Change-Id: Iaba301b9e77aa4febe0efe1e6016fab42d5589f3
 2014-08-28 18:08:00 -07:00
skal
f75dfbf23d Speed up Huffman decoding for lossless 
speed-up is ~1.6% for photographic image to 10% for graphical image
(1000 images corpus was sped up by 5.8 %)

Code by akramarz@google.com and jyrki@google.com

Change-Id: Iceb2e50e6cc761b9315a3865d22ec9d19b8011c6
 2014-08-28 12:28:04 -07:00
James Zern
637b388809 dsp/lossless: workaround gcc-4.9 bug on arm 
force Sub3() to not be inlined, otherwise the code in Select() will be
incorrect.
https://android-review.googlesource.com/#/c/102511

Change-Id: I90ae58bf3e6cc92ca9897f69974733d562e29aaf
 2014-08-27 20:31:21 -07:00
James Zern
8323a9038d dsp.h: collect gcc/clang version test macros 
endian_inl.h already relies on dsp.h, grab the definitions from there.

Change-Id: I445f7d0631723043c55da1070498f89965bec7b1
 2014-08-27 19:33:09 -07:00
skal
e6c4b52f28 move static initialization of WebPYUV444Converters[] to the Init function. 
Split initialization of YUV444Converters[] out of Upsamplers init.

update test for NULL function pointers

Change-Id: I9603f54250f90c85a12ffbecfd6c59e9b06c47e0
 2014-08-27 11:36:37 -07:00
skal
49911d4df2 Merge "fix indentation" 2014-08-27 07:52:36 -07:00