Commit Graph

80 Commits

Author SHA1 Message Date
James Zern
f307f98b21 Merge "webpmux: let -- stop parameter parsing" 2013-12-18 11:05:43 -08:00
James Zern
6f36ade926 manpage pedantry
from man-pages (7):
provides a comma-separated list of related man pages, ordered by section
number and then alphabetically by name, possibly followed by other
related pages or documents. Do not terminate this with a period.

Change-Id: I6763b3b3a89f3c2e9ed5c1a4e9d05fb9ce85dd40
2013-12-17 23:30:34 -08:00
James Zern
b4fa0a47ea webpmux: let -- stop parameter parsing
this enables webpmux to accept input files starting with '-' when using
-get/-set/-strip; -info & -frame expect an input file as one of their
parameters so no changes are necessary there.

Change-Id: I154eb6dc388258a7fb743ec76ba869bf9589be1b
2013-12-17 20:50:46 -08:00
Urvang Joshi
a9a20acfa6 gif2webp: Add a multi-threaded encode option
Change-Id: If16a5f434e0ab2965a7ac9392633ecaf8c4aff46
2013-12-17 17:01:59 -08:00
James Zern
7f9de0b948 Merge changes I994a5587,I8467bb71,I13b50688,I1e2c9c7b
* changes:
  gif2webp: let -- stop parameter parsing
  vwebp: let -- stop parameter parsing
  cwebp: let -- stop parameter parsing
  dwebp: let -- stop parameter parsing
2013-12-16 16:53:27 -08:00
James Zern
5459030be0 gif2webp: let -- stop parameter parsing
this enables gif2webp to accept input files starting with '-'

Change-Id: I994a5587e16e3af83ca45bfda8caf2dc39068b6c
2013-12-16 15:15:20 -08:00
James Zern
98af68fe26 cwebp: let -- stop parameter parsing
this enables cwebp to accept input files starting with '-'

Change-Id: I13b506886c3df8a4e8fb350f3d365eaf7e072a4a
2013-12-16 15:13:54 -08:00
James Zern
a33831e21a dwebp: let -- stop parameter parsing
this enables dwebp to accept input files starting with '-'

Change-Id: I1e2c9c7bc2963d77be039c99e72f744560f0b0a2
2013-12-16 15:13:32 -08:00
James Zern
f64535591c dwebp.1: fix typo
ICM4 -> IMC4

Change-Id: I065a1ac0dfd0b60efa782bc1a4df1adcb28b90e4
2013-12-12 20:38:23 -08:00
Urvang Joshi
4c617d3286 gif2webp: Disable output of ICC profile by default
This is to discourage generation of animated WebP images with ICC
profile, as
the real-world use-case for such images is rare at best.

Output of ICC/XMP metadata is now controlled by the '-metadata' option.

Change-Id: I8e3e29878c32bf46cbc661f50661bac602603c43
2013-12-10 14:53:06 -08:00
James Zern
c12e2369d8 cosmetics: fix a few typos
Change-Id: I73b1900b2d960c4c57ef7078df137c776b321a1b
2013-12-03 22:36:29 -08:00
skal
cbdd3e6e53 add a -dither dithering option to the decoder
Even at high quality setting, the U/V quantizer step is limited
to 4 which can lead to banding on gradient.
This option allows to selectively apply some randomness to
potentially flattened-out U/V blocks and attenuate the banding.

This option is off by default in 'dwebp', but set to -dither 50
by default in 'vwebp'.

Note: depending on the number of blocks selectively dithered,
we can have up to a 10% slow-down in decoding speed it seems.

Change-Id: Icc2446007f33ddacb60b3a80a9e63f2d5ad162de
2013-11-27 00:57:51 -08:00
Urvang Joshi
73f52133a1 gif2webp: Add a mixed compression mode
When '-mixed' option is given, each frame would be heuristically chosen
to be
encoded using lossy or lossless compression.

The heuristic is based on the number of colors in the image:
- If num_colors <= 31, pick lossless compression
- If num_colors >= 194, pick lossy compression
- Otherwise, try both and pick the one that compresses better.

Change-Id: I908c73493ddc38e8db35b7b1959300569e6d3a97
2013-11-17 18:04:07 -08:00
Pascal Massimino
5d6c5bd2a5 add entry for '-resize' option in cwebp's man
Change-Id: I04b2853825527b03cfa73377004b1a2a40b4c94f
2013-10-23 02:22:15 -07:00
skal
0b2b05049f Use deterministic random-dithering during RGB->YUV conversion
-> helps debanding (sky, gradients, etc.)

This dithering can only be triggered when using -preset photo
or -pre 2 (as a preprocessing). Everything is unchanged otherwise.

Note that this change is likely to make the perceived PSNR/SSIM drop
since we're altering the input internally.

Change-Id: Id8d4326245d9b828141de162c94ba381b1fa5813
2013-10-17 22:36:49 +02:00
Urvang Joshi
fb887f7fe6 gif2webp: Different kmin/kmax defaults for lossy and lossless
These were the best values found considering the compression gain and
decoding speed.

Change-Id: Iddae4c5b78c6aa42b1f8a034d1c1b93843071a81
2013-09-30 14:25:58 -07:00
Urvang Joshi
d538cea8c2 gif2webp: Support a 'min' and 'max' key frame interval
Change-Id: If910c8849d7210e7227db0f45affa26fce7da102
2013-09-12 13:41:09 -07:00
Urvang Joshi
e81fac86dd Add support for "no blend" in webpmux binary
Change-Id: I6d07b120626317df73f1a6f026931c5b9485a340
2013-08-26 18:04:52 -07:00
James Zern
61405a143d dwebp: enable stdout output with WIC
Change-Id: Ieb73a414784480945bba6cb2687468517e24e755
2013-08-20 19:59:30 -07:00
Urvang Joshi
f0d6a14b64 gif2webp: Insert independent frames at regular intervals.
We use the 'do not blend' option for creating independent frames.
We also mark the already independent frames as 'do not blend'.

This bounds the maximum number of frames that need to be decoded to
decode a given frame, thus leading to a much better decoding performance.

Change-Id: I7cef98af2b53751ec36993fd2bd54f7f4c4aad2b
2013-08-20 11:47:48 -07:00
skal
a5e8afafcb output to stdout if file name is "-"
Doesn't work with WIC

+ redirect some info messages from stdout to stderr
+ fix the error reporting upon output-writing error

Change-Id: I92b8bd7a15e656a3f3cdfbf56299f024e39453f8
2013-08-19 13:30:27 -07:00
Pascal Massimino
a3aede9739 add uncompressed TIFF output support
new option: 'dwebp -tiff ...'
This is a very simple uncompressed-tiff writing method.

Change-Id: Ie2182c8498bce570de3cde363abe1099e18596cb
2013-05-11 01:46:24 -07:00
Pascal Massimino
b66caee410 dwebp: add support for BMP output
Supports alpha output too.

Change-Id: I42ea0bf7b6bbb420f0e537d372a3b13fe00528a9
2013-04-09 18:52:34 -07:00
Pascal Massimino
e7d9548c9b add WebPBlendAlpha() function to blend colors against background
new option: -blend_alpha 0xrrggbb
also: don't force picture.use_argb value for lossless. Instead,
delay the YUVA<->ARGB conversion till WebPEncode() is called.
This make the blending more accurate when source is ARGB
and lossy compression is used (YUVA).
This has an effect on cropping/rescaling. E.g. for PNG, these
are now done in ARGB colorspace instead of YUV when lossy compression
is used.

Change-Id: I18571f1b1179881737a8dbd23ad0aa8cddae3c6b
2013-04-02 19:14:30 -07:00
James Zern
0d6927d3cd Merge "Mark fragment options as experimental in webpmux" into 0.3.0 2013-03-16 10:45:52 -07:00
Urvang Joshi
5dbd403029 Mark fragment options as experimental in webpmux
This is to disallow any accidental creation/parsing of fragmented images
by users.

Change-Id: I970a4bd5ec5a522867b24a0c9efb45164ae67047
2013-03-16 04:07:19 -07:00
James Zern
d8dc72a039 examples: normalize icc related program arguments
use 'icc' rather than 'iccp'.

Change-Id: I9667f286bfa1cfeb0ac49148ba341d268b051b98
2013-03-14 19:05:22 -07:00
skal
9bfbdd144f 1.5x-2x faster encoding for method 3 and up
using token-buffer (that is: slightly more memory. O(output_size))

This change is ON by default. To return to previous behaviour, use
'cwebp -low_memory' or set config.low_memory to true.

Side-effect of this new mode: it forces 1 partition only (which was
default anyway), and makes some statistics about the bitstream
no longer available. cwebp will no longer report 'intra4-coeffs', etc.

This mode also doesn't work (yet) with multi-pass, and -low_memory
is currently forced for multi-pass.

also: reversed the flag: USE_TOKEN_BUFFER -> DISABLE_TOKEN_BUFFER
also: fixed the kAverageBytesPerMB estimate

Change-Id: I4ea80382038d6df4309663e0cb7bd88d9bca9cf1
2013-03-11 17:01:33 -07:00
skal
f817930a55 multi-threaded alpha encoding for lossy
new option: 'cwebp -mt ...'
new config flag: config.thread_level
(allowed thread_level are 0 or 1 for now. Maybe more later...)
If -mt is activated (and WEBP_USE_THREAD is used for compile), the alpha-compression
will be done in parallel to RGB coding for lossy. Can save quite a bit of latency...
Has no effect for lossless encoding.

Change-Id: I769d0bf90e7380cf99344ad62cd77277f4df5a46
2013-03-01 10:04:08 +01:00
Urvang Joshi
a5042a3240 GetVersion() methods for mux and demux
Also use the same in example binaries.

Change-Id: Id4bb4c4231a6b8fe9ed4370a6f46567c52a04a17
2013-02-26 14:22:06 -08:00
Pascal Massimino
92668da6f2 change default filtering parameters:
* type is now 'strong'
  * strength is now '60'

These help with gradients and blocking

Change-Id: Ie1c8265c557306ef5e9ccefacf43e10946e55370
2013-02-15 01:09:32 -08:00
skal
e895059a05 add a -jpeg_like option
This option remaps internal parameters to better match
the expected compression curve of JPEG and produce output files
of similar size, but with better quality.

Change-Id: I96a1cbb480b1f6a0c6845a23c33dfd63f197b689
2013-02-06 14:19:16 +01:00
James Zern
14c3820038 manpages: italicize option parameters
Change-Id: Id7e4edde2a1c91fe4fbf96ddc280a06132e9986a
2013-02-01 20:35:58 -08:00
Pascal Massimino
12d6cecfbd fix extra space in dwebp.1 man
Change-Id: Ifa3d91c73e0efeecb02365bc2168c830a01c759a
2013-01-30 04:50:03 -08:00
skal
66c810bc3c add a -yuv option to dwebp (very similar to -pgm)
It will decode to raw (flat) YUV format, similar to what
cwebp can take as input. Makes the PSNR/SSIM calculation easier.

Change-Id: Iebfaedfc0bedc70c169b24ae4aabc701488d0644
2013-01-28 23:22:14 +01:00
skal
d8f21e0bab add link to SSIM description on Wikipedia
+ a brief description of LSIM

Change-Id: I4344f3e3b28d8bc4109b729dec9000e9c8fcbdbb
2013-01-18 13:13:56 +01:00
James Zern
7eaee9f1ac cwebp: add -metadata option
currently has no effect except to disable metadata extraction from the
input when the value is 'none'.

Change-Id: Ic50d4c9d634cc1f6b72ae4e130e99736c85a6477
2013-01-14 17:44:54 -08:00
Urvang Joshi
90e5e3190c dwebp manual: point to webpmux, gif2webp.
Change-Id: If140e3021ee1b60d6afa355883574be07e65b10c
2012-11-16 10:25:16 -08:00
Urvang Joshi
d1edf697b2 cwebp man page: meaning of '-q' for lossy/lossless
Change-Id: I00b1e6a4f35c6c191072b3c30077166e7b143f56
2012-11-15 15:57:50 -08:00
Urvang Joshi
79efa1d006 Add man page for gif2webp utility
Change-Id: Ia4826134db4e97427ab27977af7cc358b26e2b86
2012-11-15 15:55:06 -08:00
skal
4860008483 Change the order of -frame argument to be more natural
Now, its: +duration+xoffset+yoffset+disposal
+disposal can be omitted and will default to +0 (NONE)
additionally, +xoffset+yoffset can be omitted and will default to +0+0

Change-Id: I62138c9f675d4fc4408305babbcd485cb32b73d3
2012-11-14 06:19:31 +01:00
Urvang Joshi
fa30c86323 Update mux code to match the spec wrt animation
- Allow a duration of 0
- Rename LOOP chunk to ANIM and add the background color field to it.
- Add a disposal method field for each animation frame.
- Modify webpmux.c binary interface to allow the input of background color
  and disposal methods. Also make '-loop' and '-bgcolor' arguments optional
  with some default values.

Change-Id: I807372a61cdb8a0d3080ae3552caf2848070bf4d
2012-11-07 11:43:06 -08:00
Urvang Joshi
a00a3daf5b Use 'frgm' instead of 'tile' in webpmux parameters
- Also, use the term 'fragments' instead of 'tiling' in code
- This makes code consistent with the spec.

Change-Id: Ibeccffc35db23bbedb88cc5e18e29e51621931f8
2012-11-06 16:09:10 -08:00
Urvang Joshi
f903cbab9a Chunk fourCCs for XMP/EXIF
Use separate fourCCs "XMP " and "EXIF" instead of a common "META"
Also, some refactorization in webpmux.c

Change-Id: Iad3337e5c1b81e785c60670ce28b1f536dd7ee31
2012-11-06 14:53:21 -08:00
Pascal Massimino
f86e6abe1f add LSIM metric to WebPPictureDistortion()
LSIM stands for "local similarity": before matching
a compressed pixel to the source, we search around in the source
and minimise the squared error. So, this is close to PSNR calculation,
but mitigates some of its limitations (pure translation and noise for instance).

There's a new -print_lsim option to cwebp too.

Change-Id: Ia38561034c7a90e71d2ea0f55bb1de527eda245b
2012-10-19 06:48:11 -07:00
Urvang Joshi
f6c096aad3 webpmux binary: Rename 'xmp' option to 'meta'
Change-Id: I00d7d2aa43ccb1e86b58e75e8677ea8ef7e1226e
2012-08-29 22:24:10 -07:00
Urvang Joshi
ddfe871a51 webpmux help correction
Clarify 'SET_OPTIONS'

Change-Id: I623ea955beb2a800709412b914a257abd95266cc
2012-08-29 22:23:12 -07:00
James Zern
c9ae57f596 man/dwebp.1: add links to output file format details
Change-Id: I30e3e52e428c9e68ba2ec263024a1edc56ad6741
2012-08-02 15:10:31 -07:00
Vikas Arora
dd1c3873fe Add image-hint for low-color images.
For low-color images, it may be better to not use color-palettes.
Users should treat this as one another hint (as with Photo &
Picture) and another parameter for tuning the compression density.
The optimum compression can still be obtained by running (outer loop)
compression with all possible tunable parameters.

Change-Id: Icb1a4face2a84774e16e801aee4a8ae97e232e8a
2012-07-31 23:11:19 -07:00
pascal massimino
3bc3f7c0ee Merge "dwebp: add PAM output support" into 0.2.0 2012-07-20 19:09:45 -07:00