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1577 Commits

Author SHA1 Message Date
Vikas Arora
f864be3b2c Lower the quality settings for Alpha encoding. 
Evaluated the impact of this change over 1000 image corpus.
The compression density is up (on average) by 1.2% and encoding time has
gone down considerably from 716 ms (per file) to 146 ms (per file)
(4.9X improvement in encoding time).

Change-Id: Ida562cc0bfe18c9d6f5f00873c95f8396b480eab
 2012-06-29 16:19:42 +05:30
Urvang Joshi
3ba81bbe8b WebP Decoding error handling: 
- Don't allow any extended chunks (except ALPH) without RIFF & VP8X
chunks.
- Also, don't allow VP8X without RIFF.

Change-Id: I1beba43e617ec637901aeeb93f2f484ec086a75d
 2012-06-29 14:32:21 +05:30
Pascal Massimino
fcc69923b9 add automatic YUVA/ARGB conversion during WebPEncode() 
Adds new methods WebPPictureARGBToYUVA() and WebPPictureYUVAToARGB()
Depending on the value of picture->use_argb_input,
the main call WebPEncode() will convert appropriately.
Note that both conversions are lossy, so it's recommended to:
* use YUVA input for lossy compression (picture->use_argb_input=0)
* use ARGB input for lossless compression (picture->use_argb_input=1)

Change-Id: I8269d607723ee8a1136b9f4999f7ff4e657bbb04
 2012-06-28 00:34:23 -07:00
Pascal Massimino
802e012a18 fix compilation in non-FANCY_UPSAMPLING mode 
Change-Id: Id0b1fad3a4888b6e9563a227412b2e6a656d9a2a
 2012-06-28 00:26:35 -07:00
Pascal Massimino
e012dfd90f make width/height coding match the spec 
* width/height in VP8X chunk is 24bit now
* Added some more constants #defines

Change-Id: I2f8ca7f965a247bccd341dd079ed2abf549c39d7
 2012-06-28 00:20:28 -07:00
James Zern
228d96a538 mark VP8{,L}{GetInfo,CheckSignature} as WEBP_EXTERN 
these functions are used by libwebpmux

Change-Id: Ifcb79e685f3a6b53007c0dc5f220737daba97d47
 2012-06-27 16:07:33 -07:00
Pascal Massimino
637a314f97 remove the now unused *KeepA variants 
Change-Id: I65217f3075e30bc9a7f38a49d09f01c9d7271d6a
 2012-06-27 10:00:48 -07:00
James Zern
b9ae4f0d88 cosmetics after mux changes b74ed6e, b494ad5 
Change-Id: I8f693b1ba2537de89bda1dfbcf3b95abd17e420a
 2012-06-22 14:30:01 -07:00
Urvang Joshi
b494ad5096 Mux: only allow adding frame/tiles at the end. 
Change-Id: I5d685628da8c8ac85144cee2e5808b30ec79fef9
 2012-06-22 11:18:18 -07:00
pascal massimino
2c341b0eed Merge "Added image characteristic hint for the codec." 2012-06-22 02:54:51 -07:00
Vikas Arora
d373076a53 Added image characteristic hint for the codec. 
This image type hint is used by codec to apply appropriate set of
transform filters to the image.

Change-Id: Ibb24e47ba14c40fa7f9f2c50ae86e03f2b29e9a6
 2012-06-22 14:03:46 +05:30
pascal massimino
2ed2adb5ba Merge "msvc: add intrinsic based BitsLog2Floor" 2012-06-22 00:13:47 -07:00
James Zern
e595e7c552 Merge "add demux.c to the makefiles" 2012-06-21 23:44:44 -07:00
James Zern
da47b5bda7 Merge "demux: add {Next,Prev}Chunk" 2012-06-21 23:43:03 -07:00
James Zern
e5f467420d add demux.c to the makefiles 
Change-Id: If98c0ea859c845261218196df35e905589f09e76
 2012-06-21 23:21:41 -07:00
James Zern
4708393c3b demux: add {Next,Prev}Chunk 
replaces WebPDemuxSetChunk(). makes this consistent with the Frame
interface.

Change-Id: Ia2b1b98cc290f35b41fd14ee35a2a17cecac7ba8
 2012-06-21 23:18:39 -07:00
James Zern
e8a0a821d2 demux: quiet msvc warnings 
min_size is safe to be a uint32_t so avoid the size_t -> uint32_t
conversion

Change-Id: Ib53fe58d313b55dfcf3bee35d0cad48f210d07bf
 2012-06-21 23:09:38 -07:00
Pascal Massimino
31b68fe639 cleanup WebPPicture struct and API 
* add a real proper pointer for holding memory chunk pointer
  (instead of using y and argb fields)
* polish the doc with details
* add a WebPPictureView() that extract a view from a picture
  without any copy (kind of a fast-crop).
* properly snap the top-left corner for Crop/View. Previously,
  the luma position was not snapped, and was off compared to the chroma.

Change-Id: I8a3620c7f5fc6f7d1f8dd89d9da167c91e237439
 2012-06-21 00:30:43 -07:00
Pascal Massimino
9144a18643 add overflow check before calling malloc() 
It's preferable to be over-strict and paranoid here.

Change-Id: Ia928b279b753fa8f836d17decb17a35e6dc441b3
 2012-06-20 23:58:43 -07:00
Pascal Massimino
81720c9139 consistency cosmetics 
Change-Id: Ie8e372ddcdd6e48527478f70bf716953ed18292a
 2012-06-20 23:56:11 -07:00
James Zern
7144308402 enc/vp8l.c: fix build 
broken since:
233a589 take picture->argb_stride into account for lossless coding

Change-Id: I9ecbbf65f3048be3077d28c3a20dfc0e1afa10be
 2012-06-20 14:44:39 -07:00
pascal massimino
8de9a0847b Merge "Mux API change:" 2012-06-20 11:11:49 -07:00
Urvang Joshi
b74ed6e766 Mux API change: 
'Set' and 'Get' methods for images take/return a bitstream as input,
instead of separate 'image' and 'alpha' arguments.

Also,
- Make WebPDataCopy() a public API
- Use WebPData for storing data in WebPChunk.
- Fix a potential memleak.

Change-Id: I4bf5ee6b39971384cb124b5b43921c27e9aabf3e
 2012-06-20 11:00:42 -07:00
Pascal Massimino
233a589ea9 take picture->argb_stride into account for lossless coding 
analysis phase was assuming flat layout...

Change-Id: I96681f6d76aa3faabc51dd2ee3dffbe77ff90d36
 2012-06-20 10:13:04 -07:00
James Zern
69d022176d cosmetics: add missing const 
Change-Id: I0c0e89bbe826961b02a40ada5a6f89e02abee378
 2012-06-19 22:28:34 -07:00
James Zern
5b08318b57 cosmetics: remove unimplemented function proto 
Change-Id: I580fcc756d161cebbabf753ee68c09d189628d7f
 2012-06-19 22:27:56 -07:00
James Zern
e1f769fe1c msvc: add intrinsic based BitsLog2Floor 
Change-Id: Ic0c7d2f03e300c6699e130916a759403e672f9d8
 2012-06-19 16:14:54 -07:00
Vikas Arora
8a69c7d8af Bug-fix: Clamp backward dist to 1. 
Check for valid bounds on the 'dist' in backward reference case.
Clamp it to 1 in case of zero and negative values.

Change-Id: I78e956d4595955efa02b1f9628b475093f6ee001
 2012-06-19 16:44:03 +05:30
James Zern
b5b6ac979f Merge "Bring the special writer 'WebPMemoryWriter' to public API" 2012-06-18 16:22:17 -07:00
pascal massimino
a6a1909fff Merge "Fix floating point exception with cwebp -progress" 2012-06-18 16:11:53 -07:00
James Zern
f2cee06708 Fix floating point exception with cwebp -progress 
Adds a test of enc->mb_h_ to VP8IteratorProgress() to avoid a division
by zero. Fixes issue #121.

Original patch from even rouault (even dot rouault at gmail dot com).

Change-Id: Ie5fcc1821860c0a9366d5aa11f3aded4f5b98ed7
 2012-06-18 15:43:28 -07:00
Pascal Massimino
91b7a8c754 Bring the special writer 'WebPMemoryWriter' to public API 
=> WebPMemoryWriter, WebPMemoryWriterInit(), WebPMemoryWrite()

Change-Id: I142fb22b0290ece7a6f6d74f00964a2e9e58ec9b
 2012-06-18 15:42:56 -07:00
Pascal Massimino
310e297205 support resize and crop for RGBA input 
Change-Id: I19eac3fb4f8ecb973ff5872ac3a921f8947054bf
 2012-06-18 15:20:46 -07:00
pascal massimino
ce614c0caf Merge "dec/vp8: avoid setting decoder status twice" 2012-06-18 14:12:21 -07:00
James Zern
900285dac3 dec/vp8: avoid setting decoder status twice 
Has the potential of returning confusing USER_ABORT for bitstream errors
in some cases.

Change-Id: I358fdb0b36549179df6dc2a95c09a872bd35aa24
 2012-06-18 14:10:01 -07:00
James Zern
dcda59c12d Merge "demux: rename SetTile to SelectTile" 2012-06-18 13:50:45 -07:00
James Zern
622ef12ea5 demux: rename SetTile to SelectTile 
Change-Id: I52b0b30578aeb77b71069f355c6b00901b948634
 2012-06-18 13:49:41 -07:00
pascal massimino
81ebd37505 Merge "demux: add {Next,Prev}Frame" 2012-06-18 13:41:42 -07:00
James Zern
02dd37a2a3 demux: add {Next,Prev}Frame 
Replaces WebPDemuxSetFrame().

Change-Id: I38cef0ebeabb5c2f164322502abe1780f7a65e06
 2012-06-18 13:37:16 -07:00
pascal massimino
4b79fa5923 Merge "Limit the maximum size of huffman Image to 16MB." 2012-06-17 00:20:26 -07:00
James Zern
18cae37b91 msvc: silence some build warnings 
these are related to the removal of USE_LOSSLESS_ENCODER

Change-Id: Ib0ca5bc2766c351130507bc2e657a034c8455b34
 2012-06-13 13:51:50 -07:00
Vikas Arora
b3923084b9 Limit the maximum size of huffman Image to 16MB. 
This limit corresponds to default histo_bits=3 for images upto sizes 400x400.
Any image higher than this dimension will bump up the histo_bits to 4 internally.

Change-Id: Ic8ba3dcd50e9c588cbbc4a0457289086498ff4ee
 2012-06-13 13:27:43 +05:30
pascal massimino
f180df2afd Merge "libwebp/demux: add Frame/Chunk iteration" 2012-06-13 00:29:29 -07:00
James Zern
2bbe1c9aa0 Merge "Enable lossless encoder code" 2012-06-13 00:28:42 -07:00
pascal massimino
d0601b0107 Merge changes I1d97a633,I81c59093 
* changes:
  libwebp/demux: add WebPDemuxGetI
  libwebp/demux: add extended format parsing
 2012-06-13 00:28:25 -07:00
Pascal Massimino
78f3e34504 Enable lossless encoder code 
Remove USE_LOSSLESS_ENCODER compile flag
Update Makefile.am and makefile.unix

Change-Id: If7080c4d8f37994c7c784730c5e547bb0a851455
 2012-06-13 00:26:58 -07:00
pascal massimino
d974a9cc15 Merge "libwebp/demux: add simple format parsing" 2012-06-13 00:03:37 -07:00
pascal massimino
26bf223280 Merge "libwebp: add WebPDemux stub functions" 2012-06-12 23:57:18 -07:00
James Zern
2f66668882 Merge "modify WebPParseHeaders to allow reuse by GetFeatures" 2012-06-12 23:51:55 -07:00
James Zern
b402b1fbb9 libwebp/demux: add Frame/Chunk iteration 
Change-Id: I2da68611b375de48391adcf446df31a93450c7d8
 2012-06-12 23:45:11 -07:00