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415 Commits

Author SHA1 Message Date
Urvang Joshi
fe42739cc8 Use integers for kmin/kmax for simplicity. 
Change-Id: I62237975d663641552107759af8d2d329b70a7c4
 2015-02-03 13:57:52 -08:00
James Zern
2c906c407c vwebp: remove unnecessary static Help() prototype 
all uses occur after its declaration

Change-Id: I775642ce6d1dec3bc6da2fa0d5d87490992c7e6c
 2015-02-02 23:35:01 -08:00
James Zern
0f017b56f3 vwebp/animation: display last frame on end-of-loop 
previously the first frame would be redisplayed, which might be
unexpected if the final frame was meant to be a composite, for example.

Change-Id: I4da795623c71501e2fa426e8fba8fb2ffcbab58a
 2015-02-02 20:05:54 -08:00
Vikas Arora
98c8138663 Enable Near-lossless feature. 
Enable the WebP near-lossless feature by pre-processing the image to smoothen
the pixels.

On a 1000 PNG image corpus, for which WebP lossless (default settings) gets
25% compression gains, following is the performance of near-lossless feature
at various '-near_lossless' levels:
-near_lossless 90: 30% (very very high PSNR 54-60dB)
-near_lossless 75: 38% (very high PSNR 48-54dB)
-near_lossless 50: 45% (high PSNR 42-48dB)
-near_lossless 25: 48% (moderate PSNR 36-42dB)
-near_lossless 10: 50% (PSNR 30-36dB)

WebP near-lossless is specifically useful for discrete-tone images like
line-art, icons etc.

Change-Id: I7d12a2c9362ccd076d09710ea05c85fa64664c38
 2015-01-29 16:10:20 -08:00
pascal massimino
b8c2013512 Merge "wicdec: (msvs) quiet some /analyze warnings" 2015-01-17 12:15:16 -08:00
James Zern
9b228b5416 wicdec: (msvs) quiet some /analyze warnings 
add additional return checks and asserts to avoid:
C6102: Using 'XXX' from failed function call ...

Change-Id: I51f5fa630324e0cd7b2d9fceefecb4f4021474b1
 2015-01-17 11:50:47 -08:00
James Zern
7a191398ca dwebp/WritePNG: mark png variables volatile 
these are used on both sides of the setjmp().

Change-Id: I4a789bfb3a5d56946a22286c5a140008d90e1ba2
 2015-01-16 19:26:32 -08:00
James Zern
775dfad297 dwebp: include setjmp.h w/WEBP_HAVE_PNG 
setjmp() is used in WritePNG().

Change-Id: Iadd836272fc7d368d635c891507ce2a08c4d3dec
 2015-01-16 19:26:21 -08:00
James Zern
47d26be760 dwebp: correct sign in format strings 
width / height are unsigned; fixes a warning with msvs /analyze:
C6340: Mismatch on sign: 'const unsigned int' passed as _Param_(4) when
some signed type is required in call to 'fprintf'.

Change-Id: I5f1fad4c93745baf17d70178a5e66579ccd2b155
 2015-01-16 19:26:20 -08:00
Urvang Joshi
d1c4ffae89 gif2webp: Move GIF decoding related code to a support library. 
Change-Id: Ifa5e663eb0db7e1e08174fe6608bd45950281abb
 2015-01-13 17:07:33 -08:00
Urvang Joshi
0f54f1ec5f Remove gif2webp_util which is no longer needed. 
Change-Id: I5e1237ab250273bc1e6fb4c422fb502f8ca8aeb6
 2015-01-09 13:06:29 -08:00
James Zern
ac79ed19ef webpmux: remove experimental fragment handling 
Change-Id: I1c418b76b43dfb20cbf7f97d7011ca0d76472ba0
 2015-01-08 20:03:51 -08:00
Urvang Joshi
67720c8bde Move over gif2webp to the new AnimEncoder API. 
As frame disposal and blending are GIF specific, they are handled in gif2webp
itself now.

Change-Id: Idcf557bd48edf5c283ce7fef151789c3ffb8ce12
 2015-01-08 03:47:00 -08:00
Urvang Joshi
5cccdadf2e FlattenSimilarBlocks should only be tried when blending is possible. 
This is because, FlattenSimilarBlocks() replaces some opaque pixels by
transparent ones. This results in an equivalent output only if blending
is turned on for the current frame.

Change-Id: I05612c952fdbd4b3a6e0ac9f3a7d49822f0cfb9b
 2014-11-05 10:44:07 -08:00
Urvang Joshi
7489b0e72b gif2webp: Add '-min-size' option to get best compression. 
This disables key-frame insertion and tries both dispose methods for
each frame.

Change-Id: Ib167747198fd1d98cb93321f76826e91228f24d8
 2014-10-30 15:17:09 -07:00
Urvang Joshi
c94ed49efd gif2webp: Use the default hint instead of WEBP_HINT_GRAPH. 
This is much faster and the compression is slightly better too.

Change-Id: Ibf0d10eea83bfabfcc44ee497074767462ff41b1
 2014-10-27 16:41:39 -07:00
Urvang Joshi
65e5eb8a62 gif2webp: Support GIF_DISPOSE_RESTORE_PREVIOUS 
Tweaked the gif2webp_util API to support this.

Requested in: https://code.google.com/p/webp/issues/detail?id=144

Change-Id: I0e8c4edc39227355cd8d3acc55795186e25d0c3a
 2014-10-22 17:02:07 -07:00
Urvang Joshi
e4c829efe9 gif2webp: Handle frames with odd offsets + disposal to background. 
Snapping odd offsets in GIF to even offsets in WebP was causing extra row/column
being disposed in such cases.

Code is rewritten to maintain previous and current canvas (it used to maintain
previous canvas and current frame earlier). And we recompute change rectangles
as those from GIF may no longer apply.
Also, this renders methods like ReduceTransparency() and ConvertToKeyFrame()
redundant, as internally maintained current canvas is always independent of
previous canvases.

Disposal method choice: we pick the disposal method that results in the smallest
change rectangle.

Change-Id: Ic31186d98fe1a2a790a89d1571b17e3abd127e79
 2014-10-22 15:43:26 -07:00
James Zern
54edbf65ff stopwatch.h: fix includes 
WEBP_INLINE -> webp/types.h
memcpy -> string.h

Change-Id: Iab2ea8b553dc98be75eede751de62ab0292d1f97
 2014-10-22 17:25:41 +02:00
Pascal Massimino
f358eeb891 add code for testing random incremental decoding in dwebp 
(protected with WEBP_EXPERIMENTAL_FEATURES flag)

Change-Id: I6cc2488810ce2ccd5d45882bd12f34a3d0c8eab8
 2014-10-16 17:01:32 +02:00
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
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
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
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
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
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
skal
b5a36cc9ad add -near_lossless [0..100] experimental option 
This compresses the uimage using lossless compression and controlable
decimating pre-process.
Code is under WEBP_EXPERIMENTAL_FEATURE while it's being experimented with.

Change-Id: I8b7f4cfcc3c6afc52a556102842bdbb045ed5ee8
 2014-08-05 19:17:10 +02:00
James Zern
29a9fe222a libwebp 0.4.1 
- 7/24/14: version 0.4.1
   This is a binary compatible release.
   * AArch64 (arm64) & MIPS support/optimizations
   * NEON assembly additions:
     - ~25% faster lossy decode / encode (-m 4)
     - ~10% faster lossless decode
     - ~5-10% faster lossless encode (-m 3/4)
   * dwebp/vwebp can read from stdin
   * cwebp/gif2webp can write to stdout
   * cwebp can read webp files; useful if storing sources as webp lossless
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Merge tag 'v0.4.1'

libwebp 0.4.1
- 7/24/14: version 0.4.1
  This is a binary compatible release.
  * AArch64 (arm64) & MIPS support/optimizations
  * NEON assembly additions:
    - ~25% faster lossy decode / encode (-m 4)
    - ~10% faster lossless decode
    - ~5-10% faster lossless encode (-m 3/4)
  * dwebp/vwebp can read from stdin
  * cwebp/gif2webp can write to stdout
  * cwebp can read webp files; useful if storing sources as webp lossless

* tag 'v0.4.1':
  update ChangeLog
  iosbuild.sh: specify optimization flags
  update ChangeLog
  makefile.unix: add vwebp.1 to the dist target
  update ChangeLog
  gif2webp: dust up the help message
  remove -noalphadither option from README/vwebp.1
  update NEWS for the next release
  update AUTHORS
  bump version to 0.4.1
  restore mux API compatibility
  remove the !WEBP_REFERENCE_IMPLEMENTATION tweak in Put8x8uv
  restore encode API compatibility
  restore decode API compatibility
  gif2webp: fix compile with giflib 5.1.0
  gif2webp: simplify giflib version checking

Change-Id: Icf599f29bc6c0db757bc133aaddb3dbbbc316e08
 2014-07-29 18:06:58 -07:00
Vikas Arora
e09e9ff6e5 Record & log the image pre-processing time. 
Change-Id: If0ecec3046e87fe0021446a98f3e94c7e0576bb8
 2014-07-28 16:05:42 -07:00
James Zern
2def1fe635 gif2webp: dust up the help message 
* try to avoid trailing '.'
* rationalize capitalization

missed in:
0a8b886 dust up the help message

Change-Id: I6f80736cc8a2ff4f185f63d463a57d5bbf88a0db
 2014-07-23 20:03:49 -07:00
James Zern
fb668d78b3 remove -noalphadither option from README/vwebp.1 
+ vwebp's -help output

this is a future option; missed in:
793368e restore decode API compatibility

Change-Id: If920df2cf8de57ebad93a6b98830562149396d8d
 2014-07-23 19:54:34 -07:00
James Zern
862d296cf9 restore mux API compatibility 
protect WebPMuxSetCanvasSize w/a WEBP_MUX_ABI_VERSION check

Change-Id: I6b01af55ebb4cc4c860d3cbf43be722077896748
 2014-07-23 16:13:56 -07:00
James Zern
d713a69644 Merge changes If4debc15,I437a5d5f into 0.4.1 
* changes:
  restore encode API compatibility
  restore decode API compatibility
 2014-07-23 13:56:27 -07:00
James Zern
c2fc52e4ec restore encode API compatibility 
protect WebPConfigLosslessPreset/WebPMemoryWriterClear w/a
WEBP_ENCODER_ABI_VERSION check

Change-Id: If4debc15fee172a3f18079bc2bd29eb8447bc14b
 2014-07-22 22:19:55 -07:00
James Zern
793368e8c6 restore decode API compatibility 
protect flip/alpha_dither w/a WEBP_DECODER_ABI_VERSION check

Change-Id: I437a5d5f78800f71b7e7e323faa321f946bf9515
 2014-07-22 20:03:52 -07:00
James Zern
b8984f3151 gif2webp: fix compile with giflib 5.1.0 
DGifCloseFile() added an error code output parameter
http://giflib.sourceforge.net/gif_lib.html#compatibility

fixes issue #209

original patch by grizzly dot nyo at gmail

Change-Id: I5554de2bd70dbfd95fd356424ad5fb800ac94592
 2014-07-22 17:50:30 -07:00
James Zern
222f9b1a9d gif2webp: simplify giflib version checking 
introduce LOCAL_GIF_PREREQ/VERSION similar to the GCC variants in dsp.

Change-Id: I00ba5d523047b3b1c14ade992172e75e69043eb3
 2014-07-22 17:41:55 -07:00
skal
4595b62b7c Merge "use explicit size of kErrorMessages[] arrays" 2014-07-21 13:37:49 -07:00
skal
fbda2f499c JPEG decoder: delay conversion to YUV to WebPEncode() call 
We store the raw RGB samples decoded from JPEG, and avoid precision loss.

Note that this may increase the encoding time reported by
cwebp -v, since RGB->YUV now occur during WebPEncode call
(in case of lossy), instead of ReadJPEG().
This also increases the memory use, since we're carying the
source ARGB samples around.

Change-Id: Ic2180206cfc9f5574f391e91c3b89b9d81695d01
 2014-07-21 22:26:22 +02:00
skal
0b747b1b39 use explicit size of kErrorMessages[] arrays 
Change-Id: If02864e3a07ae37814bf379bf347862cd2871bf4
 2014-07-21 13:21:56 -07:00
Pascal Massimino
257adfb0be remove experimental YUV444 YUV422 and YUV400 code 
(never used)

Change-Id: I12a886703592133939607df05132e9b498f916c1
 2014-07-03 22:26:25 -07:00