Commit Graph

298 Commits

Author SHA1 Message Date
Urvang Joshi
38efdc2e9c Simplify the gif2webp tool: move the optimization details to util
Specifically:
- Merge OptimizeAndEncodeFrame with WebPFrameCacheAddFrame: they use the same
  if-else structure.
- Move maintenance of 'prev_canvas' and 'curr_canvas' to util.
- Move ReduceTransparency() and FlattenPixels() calls to SetFrame(): This is in
  preparation for the next patch: which will try try lossless encoding for
  each frame, even when '-lossy' option is given.
- Make most methods static inside util.

No changes to output expected.

Change-Id: I1f65af25246665508cb20f0f6e338f9aaba9367b
2013-10-14 14:39:46 -07:00
skal
d155507cb9 Merge "use HINT_GRAPH as image_hint for gif source" 2013-10-09 02:58:15 -07:00
skal
9c561646ac Merge "only print GIF_DISPOSE_WARNING once" 2013-10-09 02:56:45 -07:00
skal
05879865da use HINT_GRAPH as image_hint for gif source
quite rarely, it gives a different output
then without the HINT, but that's often for
a smaller size (tested with default -m and -m 6)

Change-Id: I51d221ab61f8e007983325031345728e8d80b241
2013-10-09 11:55:51 +02:00
skal
00125196f3 gif2webp: detect and flatten uniformly similar blocks
helps during lossless compression.

10% average saving, but that's mostly on what was previously
'difficult' cases, where the gain is ~30-50% actually.
Non-difficult cases are mostly unchanged.
Tested over ~7k random web gifs.

Change-Id: I09db4560e4ab09105d1cad28e6dbf83842eda8e9
2013-10-08 15:04:52 +02:00
skal
0deaf0fa44 only print GIF_DISPOSE_WARNING once
Change-Id: Iece235a6ee767cc2e3866bb6c9bb1d56d9a9ffb9
2013-10-08 15:02:33 +02:00
skal
5a7533ceb3 small gif2webp fix
the old kmin value was printed instead of the new one.

Change-Id: I0dcf23a29b7ce6bad08013a1980c5ce027b1bfe9
2013-10-04 21:13:35 +02:00
Urvang Joshi
606c4304c4 gif2webp: Improved compression for lossy animated WebP
We reduce transparency by turning some transparent pixels into
corresponding RGB values from previous canvas.

This improves compression by about 23%.

Change-Id: I02d70a43a1d0906ac09a7e2dc510be3b2d38f593
2013-09-30 16:48:39 -07:00
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
skal
5cd43e4316 Add -incremental option to dwebp
useful for testing. Not listed in the man or README, since
it's only useful for testing the incremental decoding
(e.g. measuring the timing difference compared to non-incremental)

Change-Id: I8df8046e031d21006242babb5bcac09f8ff9f710
2013-09-19 13:20:45 +02:00
Urvang Joshi
54b8e3f6e2 webpmux: DisplayInfo(): remove unnecessary error checks.
As WebPMuxCreate() would have succeeded by then, many of the calls
cannot fail.

Change-Id: I3220c59e9aa47c948da9f8741b4098c47b91a8fc
2013-09-18 11:44:24 -07:00
Urvang Joshi
0e6747f88d webpmux -info: display dimensions and has_alpha per frame
Also, more readable dispose and blend methods.

Change-Id: I318431f94dcdee4c5da296a48e6f3762aa254c1f
2013-09-16 15:29:24 -07:00
Urvang Joshi
d78a82c407 Sanity check for underflow
Change-Id: I52dbdcbd02c344c6260f196afad30005d14d3ee0
2013-09-16 13:35:13 -07:00
Pascal Massimino
8498f4bfe2 Merge "remove -Wshadow warnings" 2013-09-16 13:19:39 -07:00
Urvang Joshi
e89c6fc867 Avoid a potential memleak
Change-Id: I76f30fb40743a989bce25b40238cf0db55bd07e0
2013-09-16 13:12:33 -07:00
Pascal Massimino
2f5e893400 remove -Wshadow warnings
"warning: declaration of ‘index’ shadows a global declaration"

Change-Id: I65f079aa4cd300cd1b3887a040b75c6b0f36ca1d
2013-09-14 02:02:09 -07:00
Pascal Massimino
bf3a29b302 Merge "add proper WEBP_HAVE_GIF and WEBP_HAVE_GL flags" 2013-09-14 01:57:36 -07:00
skal
2b0a759335 Merge "fix some warnings from static analysis" 2013-09-13 13:00:12 -07:00
Pascal Massimino
79ff03460a add proper WEBP_HAVE_GIF and WEBP_HAVE_GL flags
...and make gif2webp and vwebp compile without them.

Makefile.vc still to be updated...
Meanwhile the CL environment variable can be supplemented with

set CL=/DWEBP_HAVE_GL /IC:\opt\freeglut\include

Change-Id: I37a60b8c32aafd125bffa98b6cc9f57c022ebbd0
2013-09-13 12:46:41 -07:00
skal
d51f45f047 fix some warnings from static analysis
http://code.google.com/p/webp/issues/detail?id=138

Change-Id: I21470e965357cc14eab356e2c477c7846ff76ef2
2013-09-13 11:33:30 +02:00
Urvang Joshi
d538cea8c2 gif2webp: Support a 'min' and 'max' key frame interval
Change-Id: If910c8849d7210e7227db0f45affa26fce7da102
2013-09-12 13:41:09 -07:00
Pascal Massimino
b11c9d6284 dwebp: use default dct_method
No significant speed diff was observed.
Avoids idct mismatch artifacts.

Change-Id: I9ca64d165d313f23b4aa231e7a97a20213ff86c7
2013-09-03 15:48:41 -07:00
Urvang Joshi
e81fac86dd Add support for "no blend" in webpmux binary
Change-Id: I6d07b120626317df73f1a6f026931c5b9485a340
2013-08-26 18:04:52 -07:00
Urvang Joshi
3b80bc4859 gif2webp: Separate out each step into a method
We now have ReadFrame(), OptimizeFrame(), EncodeFrame() and
DisposeFrame()
methods.

Change-Id: I522834bad18dd6a7a3ddac7c00dfd829c48248f8
2013-08-22 11:14:51 -07:00
James Zern
61405a143d dwebp: enable stdout output with WIC
Change-Id: Ieb73a414784480945bba6cb2687468517e24e755
2013-08-20 19:59:30 -07:00
pascal massimino
e58cc13706 Merge "dwebp: s/unsigned char/uint8_t/" 2013-08-20 15:03:46 -07:00
James Zern
72501d4309 dwebp: s/unsigned char/uint8_t/
Change-Id: I579e9b0a4d03998ca1dd8683d83d30d852551e45
2013-08-20 14:57:35 -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
pascal massimino
ede3602e5d Merge "cosmetics: fix indent" 2013-08-19 17:56:21 -07:00
James Zern
3a65122a53 dwebp: fix stdout related output
logic was incorrect for the error output

Change-Id: I89e665f8065490e12e1bf3d3008087d42daee16b
2013-08-19 17:52:33 -07:00
James Zern
388a7249c9 cosmetics: fix indent
Change-Id: Iad0fce79886bed0d61ddf2510ce133a5355ebc1f
2013-08-19 17:51:04 -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
14dd5e781a fix const-ness
Change-Id: I09c85fdb90b4380c8fc03c8b5652bb9cf29b2021
2013-08-15 00:21:15 -07:00
Urvang Joshi
dcf652223a Support for 'do not blend' option in vwebp
Change-Id: I563e192fa727816d11d8647c559ec407205ef40b
2013-08-14 19:51:46 -07:00
Urvang Joshi
6284854bd5 Support for "Do not blend" in mux and demux libraries
Change-Id: I9566a8e2d059fe1ebd9ca99c7e13311bf3f8f281
2013-08-12 11:49:00 -07:00
Urvang Joshi
8ba1bf61a0 Stricter check for presence of alpha when writing lossless images
Earlier, all lossless images were assumed to contain alpha.
Now, we use the 'alpha_is_used' bit from the VP8L bitstream to determine
the
same.

Detecting an absence of alpha can sometimes lead to much more efficient
rendering, especially for animated images.

Related: refine mux code to read width/height/has_alpha information only
once
per frame/fragment. This avoid frequent calls to VP8(L)GetInfo().

Change-Id: I4e0eef4db7d94425396c7dff6ca5599d5bca8297
2013-07-19 11:55:09 -07:00
James Zern
a34a502989 pngdec: output error messages from libpng
Change-Id: I1981562eeab2ad07eb797cea589a033943e7f21d
2013-07-09 17:33:21 -07:00
James Zern
eeada35cd6 pngdec: add missing include
strcmp -> string.h

Change-Id: I07392d07cbad420f5d4f3abfd3ffde8626f0c0f2
2013-06-25 23:32:19 -07:00
Urvang Joshi
54b65108ad gif2webp: If aligning to even offsets, extra pixels should be transparent
This is to ensure that the output WebP image is consistent with original
GIF when displayed against any background color.

Change-Id: I14218848153eb40358aa4ce331b2543d2fc2e86c
2013-06-24 15:18:35 -07:00
James Zern
ffae9f31e8 wicdec: silence a format warning
from x86_64-w64-mingw32-gcc

examples/wicdec.c: In function ‘ExtractICCP’:
examples/wicdec.c:131:21: warning: format ‘%u’ expects argument of type
‘unsigned int’, but argument 4 has type ‘size_t’ [-Wformat]

Change-Id: I6642dae62265a2276ae9ac96dd8ce6f1e2d37ca5
2013-06-14 18:44:59 -07:00
James Zern
90e2ec5a1b Merge "probe input file and quick-check for WebP format." 2013-06-10 12:29:58 -07:00
Pascal Massimino
830f72b7e9 probe input file and quick-check for WebP format.
Error message is clearer that 'can't create demux object'.

Change-Id: Iec008601892f7cd8399e1948751747ac23305eef
2013-06-10 05:46:22 -07:00
James Zern
d640614d54 update copyright text
rather than symlink the webm/vpx terms, use the same header as libvpx to
reference in-tree files

based on the discussion in:
https://codereview.chromium.org/12771026/

Change-Id: Ia3067ecddefaa7ee01550136e00f7b3f086d4af4
2013-06-06 23:09:14 -07:00
skal
bec11092ca fix EXIF parsing in PNG
'exiftool' puts an 'APP1' chunk for exif, e.g.:
https://metacpan.org/source/EXIFTOOL/Image-ExifTool-5.87/lib/Image/ExifTool/PNG.pm#L305

Change-Id: I313d3e6945898526b8a4baf3d9016a2591a1a817
2013-06-05 10:07:48 +02:00
Pascal Massimino
b6e65f3d35 Merge "fix warnings for vs9 x64" 2013-06-03 22:27:03 -07:00
Pascal Massimino
438946dcc6 fix warnings for vs9 x64
Change-Id: Id022d48a0a898a8bf7dce437b078da6c98afd75c
2013-06-01 22:48:08 -07:00
James Zern
518f2cd738 cosmetics: gif2webp: fix indent
Change-Id: I9b7aaefb33b4101bcb572577ce17fb3953599c2b
2013-05-29 16:00:05 -07:00
skal
764fdffaac fix a memory leak in gif2webp
(rgba->yuv allocates memory)
Also fixed few warning and cleaned the code up.

Change-Id: Id904ad3ad8802ea9fc3d34247d27193dfa7b0b99
2013-05-22 23:49:24 +02:00
skal
3e59a74d72 fix two minor memory leaks in webpmux
(only occur in case of error)

Change-Id: Icab69bb364b77f8eae6cae91047354c27e610602
2013-05-22 00:58:53 +02:00
Pascal Massimino
5199eab516 Merge "add uncompressed TIFF output support" 2013-05-13 08:59:48 -07:00