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542 Commits

Author SHA1 Message Date
Pascal Massimino
48b39eb17a fix underflow for very short bitstreams 
+ hardened the asserts

Change-Id: Ie798ef2f9d848c131f6f84a35ea28ef254822d1e
 2012-07-09 16:47:34 -07:00
James Zern
7e622984bb cosmetics: param alignment, manpage wording 
after eb6f9b8, c0e8859

Change-Id: I79bcea77d65eb6d1abf1156796996f3b9909b62b
 2012-07-07 10:37:26 -07:00
Urvang Joshi
c0e8859d81 Get rid of image_info_ from WebPChunk struct. 
The image_info_ was used only in GetImageCanvasWidthHeight(). So, now
we infer it from data there.
This removal fixes a bug: earlier, 'image_info' wasn't initialized in
the WebPMuxCreate() flow, and so the canvas width/height were being
calculated to be zero.

Also, a related refactoring: Combine CreateImageInfo() and
CreateDataFromImageInfo() into a single function CreateFrameTileData().

Change-Id: I7b0afb0d36dc6e13b9d6a1135fb027aa4e03716c
 2012-07-04 18:49:56 +05:30
Pascal Massimino
0fa844fb8f cosmetic fixes on assert and 'const' where applicable 
Change-Id: Iede15b8464be453e7d12929513ed82183921265c
 2012-07-03 05:50:36 -07:00
Pascal Massimino
7f22bd2596 check limit of width * height is 32 bits 
Update the RIFF-specs file too

Change-Id: I113a7e25da2f7a19c1344c1dc5d496127cfe2596
 2012-07-03 05:42:13 -07:00
pascal massimino
88a510ff53 Merge "fix big-endian VP8LWriteBits" 2012-07-02 14:38:32 -07:00
James Zern
f56a369ab0 fix big-endian VP8LWriteBits 
bits would be lost if n_bits was > 17

Change-Id: Id315d075075338a08e10c04faa91cab347a53591
 2012-07-02 14:30:41 -07:00
pascal massimino
4691407bb3 Merge changes If39ab7f5,I3658b5ae 
* changes:
  WebPMuxCreate() error handling:
  Fix a memleak in WebPMuxCreate()
 2012-07-02 01:46:17 -07:00
Vikas Arora
cca7c7b81b Fixed nit: 10 -> 10.f 
Change-Id: I0cdb096525460b27f3adcb9f802f6dc193d5f590
 2012-07-02 11:29:01 +05:30
Urvang Joshi
5d09a244b7 WebPMuxCreate() error handling: 
Directly return NULL if no allocation is done yet.

Change-Id: If39ab7f5a55833263d3372fa0a5d9b0a600cb9ed
 2012-07-02 11:20:09 +05:30
Urvang Joshi
777341c3d0 Fix a memleak in WebPMuxCreate() 
Change-Id: I3658b5ae487082aef28989eb8abc274c207fef0f
 2012-07-02 10:19:21 +05:30
James Zern
4c3975792b Merge "mark VP8{,L}{GetInfo,CheckSignature} as WEBP_EXTERN" 2012-06-29 10:31:26 -07:00
pascal massimino
e4e36cc6c6 Merge "Mux: Allow only some frames/tiles to have alpha." 2012-06-29 05:17:26 -07:00
pascal massimino
ad2aad3c21 Merge "WebP Decoding error handling:" 2012-06-29 05:15:55 -07:00
Urvang Joshi
97649c8f6b Mux: Allow only some frames/tiles to have alpha. 
And related const fixes.

Change-Id: I79f6f1b9f8c6faac8cc4ef24b58edff6d90de045
 2012-06-29 17:17:19 +05:30
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