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103 Commits

Author SHA1 Message Date
DRC
b775351012 Convert tabs to spaces in the libjpeg code and the SIMD code (TurboJPEG retains the use of tabs for historical reasons. They were annoying in the libjpeg code primarily because they were not consistently used and because they were used to format as well as indent the code. In the case of TurboJPEG, tabs are used just to indent the code, so even if the editor assumes a different tab width, the code will still be readable.) 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1285 632fc199-4ca6-4c93-a231-07263d6284db
 2014-05-11 09:36:25 +00:00
DRC
e45363d7c2 Convert tabs to spaces in the libjpeg code and the SIMD code (TurboJPEG retains the use of tabs for historical reasons. They were annoying in the libjpeg code primarily because they were not consistently used and because they were used to format as well as indent the code. In the case of TurboJPEG, tabs are used just to indent the code, so even if the editor assumes a different tab width, the code will still be readable.) 2014-05-09 18:00:32 +00:00
Frank Bossen
13e2115054 Add option to have single DC scan 
Add option to have a single DC scan wherein all components are
interleaved when using progressive mode. This may resolve compatibility
issues raised in #29 and #48.
This option is available through -onedcscan in cjpeg
 2014-05-08 17:33:14 -04:00
Frank Bossen
8a99fcac80 Correct comment 2014-05-08 17:00:53 -04:00
Frank Bossen
c88aade31c Revert type change 
Revert type of use_moz_defaults to boolean
 2014-04-30 14:54:18 -04:00
Frank Bossen
b03b5797f4 Add optimization of quantization matrix 
Optimizes quantization matrix by minimizing reconstruction error based
on quantized coefficients.
Feature is controlled by cinfo->trellis_q_opt; disabled by default.
 2014-04-28 16:28:05 -04:00
DRC
fe9c907b45 Minor comment correction (we support the full range of IDCT scaling factors now.) 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1250 632fc199-4ca6-4c93-a231-07263d6284db
 2014-04-18 07:58:29 +00:00
DRC
682c2b69f9 Minor comment correction (we support the full range of IDCT scaling factors now.) 2014-04-18 07:57:48 +00:00
Frank Bossen
1733487e17 Add option to perform multiple trellis quantization iterations 
Multiple trellis iterations may improve coding performance as Huffman
tables are updated with each iteration. In practice the benefit appears
to be very minimal
 2014-04-01 23:14:29 +02:00
Frank Bossen
2012e32f19 Update trellis quantization to support progressive coding mode 
Trellis quantization is modified:
- to work on the configurable spectral range Ss to Se
- to optionally optimize runs of EOBs
- to optionally split optimization between 2 spectral ranges
In trellis quantization passes Huffman table code optimization is
modified such as to generable a valid code length for each possible
symbol by resetting frequency counters to 1 instead of 0
 2014-04-01 20:14:37 +02:00
Frank Bossen
2de8e97989 Add option to use lambda weighting table 
Different lambda values may be used for each frequency in DCT domain.
The weighting table is currently not configurable but can be
enabled/disabled with cinfo-> use_lambda_weight_tbl
 2014-03-26 00:06:07 +01:00
Frank Bossen
758ed27a05 Add option to use flat quantization table 
Set cinfo->use_flat_quant_tbl to TRUE to use flat quantization table or
-flat option in cjpeg
 2014-03-24 16:30:56 +01:00
Frank Bossen
d200b2c144 Initial implementation of trellis quantization 
A new pass type trellis_pass is added. It defines a pass where trellis
quantization is done in the quantize_trellis() function.
Trellis quantization can be enabled by setting use_moz_defaults to 2 or
by using the -trellis option in cjpeg
Note that trellis does currently not work with scan optimization. Scan
optimization is disabled when trellis is enabled.
 2014-03-23 21:06:01 +01:00
fbossen
b346a5cc31 Move field 2014-02-19 16:49:57 -05:00
fbossen
3d26a0a343 Regroup copying of scan buffers 2014-02-19 15:38:20 -05:00
fbossen
579d16b032 Add pruning of frequency split selection 
Skip passes for frequency splitting if they are unlikely to provide
better results.
Moved related fields from cinfo to master object.
 2014-02-19 15:12:23 -05:00
fbossen
09fde9eaf6 Clean up scan optimisation code 
Remove hard coded values and restructure code.
 2014-02-14 17:11:56 -05:00
fbossen
71f953d0be Clean up scan optimisation code 
Lessen use of hardcoded values in luma search
 2014-02-13 19:09:32 -05:00
fbossen
16c3cdb956 Initial version of scan optimisation 
First implementation of scan optimisation as done by jpgcrush. Many
parameters are currently hardcoded which should be changed.
Implementation is missing for monochrome.
 2014-02-13 16:55:56 -05:00
fbossen
52925cfff2 Add fast jpgcrush mode 
Add the fast mode of jpgcrush where:
- Huffman table optimisation is enabled
- Progressive coding mode is enabled
- New default scans are defined for progressive coding
 2014-02-11 11:09:37 -05:00
Josh Aas
72b66f9c77 Initial commit of libjpeg-turbo plus readme edits. 2014-01-13 18:28:20 -06:00
DRC
ba4a6c32f8 Implement in-memory source/destination managers even when not emulating the libjpeg v8 API/ABI 2013-01-18 23:42:31 +00:00
DRC
ab70623eb2 Implement in-memory source/destination managers even when not emulating the libjpeg v8 API/ABI 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@913 632fc199-4ca6-4c93-a231-07263d6284db
 2013-01-18 23:42:31 +00:00
DRC
de30fe9460 Change the copyright notices to make it clear that our modified files are not part of the IJG's software. 2012-12-31 02:42:18 +00:00
DRC
a73e870ad0 Change the copyright notices to make it clear that our modified files are not part of the IJG's software. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.2.x@873 632fc199-4ca6-4c93-a231-07263d6284db
 2012-12-31 02:52:30 +00:00
DRC
c1e4151607 Added new alpha channel colorspace constants/pixel formats, so applications can specify that they need the unused byte in a 4-component RGB output buffer set to 0xFF when decompressing. 2011-12-19 02:21:03 +00:00
DRC
67ce3b2352 Added new alpha channel colorspace constants/pixel formats, so applications can specify that they need the unused byte in a 4-component RGB output buffer set to 0xFF when decompressing. 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@732 632fc199-4ca6-4c93-a231-07263d6284db
 2011-12-19 02:21:03 +00:00
DRC
39ea562c07 Document new v7/v8 features; .doc = .txt 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@252 632fc199-4ca6-4c93-a231-07263d6284db
 2010-10-12 01:55:31 +00:00
Guido Vollbeding
989630f70c The Independent JPEG Group's JPEG software v8 2015-07-27 13:45:31 -05:00
Guido Vollbeding
5996a25e2f The Independent JPEG Group's JPEG software v7 2015-07-27 13:44:25 -05:00
Thomas G. Lane
5ead57a34a The Independent JPEG Group's JPEG software v6b 2015-07-27 13:43:00 -05:00
Thomas G. Lane
489583f516 The Independent JPEG Group's JPEG software v6a 2015-07-29 15:32:35 -05:00
Thomas G. Lane
bc79e0680a The Independent JPEG Group's JPEG software v6 2015-07-29 15:31:30 -05:00
Thomas G. Lane
9ba2f5ed36 The Independent JPEG Group's JPEG software v5a 2015-07-29 15:29:17 -05:00
Thomas G. Lane
36a4ccccd3 The Independent JPEG Group's JPEG software v5 2015-07-29 15:28:00 -05:00
DRC
7e08d60891 Document new v7/v8 features; .doc = .txt 2010-10-12 01:55:31 +00:00
DRC
10acd811d0 Remove comments describing DCT scaling feature 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@240 632fc199-4ca6-4c93-a231-07263d6284db
 2010-10-09 19:24:28 +00:00
DRC
ba825db7ad Remove comments describing DCT scaling feature 2010-10-09 19:24:28 +00:00
DRC
36a6eec932 Added optional emulation of the jpeg-7 or jpeg-8b API/ABI's 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@236 632fc199-4ca6-4c93-a231-07263d6284db
 2010-10-08 08:05:44 +00:00
DRC
d0d0f09d40 Added optional emulation of the jpeg-7 or jpeg-8b API/ABI's 2010-10-08 08:05:44 +00:00
DRC
3cd2e503c6 Fix compiler warning about ending struct with a comma 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@146 632fc199-4ca6-4c93-a231-07263d6284db
 2010-02-23 21:43:21 +00:00
DRC
dafd6e3e76 Fix compiler warning about ending struct with a comma 2010-02-23 21:43:21 +00:00
DRC
ca3cebbaef Compile properly with C++ 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@142 632fc199-4ca6-4c93-a231-07263d6284db
 2010-02-23 08:12:38 +00:00
DRC
9f90f4835e Compile properly with C++ 2010-02-23 08:12:38 +00:00
DRC
a1a5989d85 Update copyrights to indicate files modified with colorspace extensions 2009-08-06 08:32:00 +00:00
DRC
8ece7fef15 Update copyrights to indicate files modified with colorspace extensions 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@57 632fc199-4ca6-4c93-a231-07263d6284db
 2009-08-06 08:32:00 +00:00
DRC
f7e0f6d5f5 Implement new colorspaces to allow directly compressing from/decompressing to RGB/RGBX/BGR/BGRX/XBGR/XRGB without conversion 2009-04-03 12:00:51 +00:00
DRC
f25c071eb7 Implement new colorspaces to allow directly compressing from/decompressing to RGB/RGBX/BGR/BGRX/XBGR/XRGB without conversion 
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@35 632fc199-4ca6-4c93-a231-07263d6284db
 2009-04-03 12:00:51 +00:00
Thomas G. Lane
41f55c093a The Independent JPEG Group's JPEG software v6b 2014-09-07 20:00:00 +01:00
Thomas G. Lane
16c97143f3 The Independent JPEG Group's JPEG software v6a 2014-09-07 20:00:00 +01:00