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fc881ebb
|
2023-03-09T20:55:43
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|
TurboJPEG: Implement 4:4:1 chrominance subsampling
This allows losslessly transposed or rotated 4:1:1 JPEG images to be
losslessly cropped, partially decompressed, or decompressed to planar
YUV images.
Because tj3Transform() allows multiple lossless transformations to be
chained together, all subsampling options need to have a corresponding
transposed subsampling option. (This is why 4:4:0 was originally
implemented as well.) Otherwise, the documentation would be technically
incorrect. It says that images with unknown subsampling types cannot be
losslessly cropped, partially decompressed, or decompressed to planar
YUV images, but it doesn't say anything about images with known
subsampling types whose subsampling type becomes unknown if the image is
rotated or transposed. This is one of those situations in which it is
easier to implement a feature that works around the problem than to
document the problem.
Closes #659
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fc01f467
|
2023-01-05T06:36:46
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TurboJPEG 3 API overhaul
(ChangeLog update forthcoming)
- Prefix all function names with "tj3" and remove version suffixes from
function names. (Future API overhauls will increment the prefix to
"tj4", etc., thus retaining backward API/ABI compatibility without
versioning each individual function.)
- Replace stateless boolean flags (including TJ*FLAG_ARITHMETIC and
TJ*FLAG_LOSSLESS, which were never released) with stateful integer
parameters, the value of which persists between function calls.
* Use parameters for the JPEG quality and subsampling as well, in
order to eliminate the awkwardness of specifying function arguments
that weren't relevant for lossless compression.
* tj3DecompressHeader() now stores all relevant information about the
JPEG image, including the width, height, subsampling type, entropy
coding type, etc. in parameters rather than returning that
information in its arguments.
* TJ*FLAG_LIMITSCANS has been reimplemented as an integer parameter
(TJ*PARAM_SCANLIMIT) that allows the number of scans to be
specified.
- Use the const keyword for all pointer arguments to unmodified
buffers, as well as for both dimensions of 2D pointers. Addresses
#395.
- Use size_t rather than unsigned long to represent buffer sizes, since
unsigned long is a 32-bit type on Windows. Addresses #24.
- Return 0 from all buffer size functions if an error occurs, rather
than awkwardly trying to return -1 in an unsigned data type.
- Implement 12-bit and 16-bit data precision using dedicated
compression, decompression, and image I/O functions/methods.
* Suffix the names of all data-precision-specific functions with 8,
12, or 16.
* Because the YUV functions are intended to be used for video, they
are currently only implemented with 8-bit data precision, but they
can be expanded to 12-bit data precision in the future, if
necessary.
* Extend TJUnitTest and TJBench to test 12-bit and 16-bit data
precision, using a new -precision option.
* Add appropriate regression tests for all of the above to the 'test'
target.
* Extend tjbenchtest to test 12-bit and 16-bit data precision, and
add separate 'tjtest12' and 'tjtest16' targets.
* BufferedImage I/O in the Java API is currently limited to 8-bit
data precision, since the BufferedImage class does not
straightforwardly support higher data precisions.
* Extend the PPM reader to convert 12-bit and 16-bit PBMPLUS files
to grayscale or CMYK pixels, as it already does for 8-bit files.
- Properly accommodate lossless JPEG using dedicated parameters
(TJ*PARAM_LOSSLESS, TJ*PARAM_LOSSLESSPSV, and TJ*PARAM_LOSSLESSPT),
rather than using a flag and awkwardly repurposing the JPEG quality.
Update TJBench to properly reflect whether a JPEG image is lossless.
- Re-organize the TJBench usage screen.
- Update the Java docs using Java 11, to improve the formatting and
eliminate HTML frames.
- Use the accurate integer DCT algorithm by default for both
compression and decompression, since the "fast" algorithm is a legacy
feature, it does not pass the ISO compliance tests, and it is not
actually faster on modern x86 CPUs.
* Remove the -accuratedct option from TJBench and TJExample.
- Re-implement the 'tjtest' target using a CMake script that enables
the appropriate tests, depending on the data precision and whether or
not the Java API is part of the build.
- Consolidate the C and Java versions of tjbenchtest into one script.
- Consolidate the C and Java versions of tjexampletest into one script.
- Combine all initialization functions into a single function
(tj3Init()) that accepts an integer parameter specifying the
subsystems to initialize.
- Enable decompression scaling explicitly, using a new function/method
(tj3SetScalingFactor()/TJDecompressor.setScalingFactor()), rather
than implicitly using awkward "desired width"/"desired height"
parameters.
- Introduce a new macro/constant (TJUNSCALED/TJ.UNSCALED) that maps to
a scaling factor of 1/1.
- Implement partial image decompression, using a new function/method
(tj3SetCroppingRegion()/TJDecompressor.setCroppingRegion()) and
TJBench option (-crop). Extend tjbenchtest to test the new feature.
Addresses #1.
- Allow the JPEG colorspace to be specified explicitly when
compressing, using a new parameter (TJ*PARAM_COLORSPACE). This
allows JPEG images with the RGB and CMYK colorspaces to be created.
- Remove the error/difference image feature from TJBench. Identical
images to the ones that TJBench created can be generated using
ImageMagick with
'magick composite <original_image> <output_image> -compose difference <diff_image>'
- Handle JPEG images with unknown subsampling types. TJ*PARAM_SUBSAMP
is set to TJ*SAMP_UNKNOWN (== -1) for such images, but they can still
be decompressed fully into packed-pixel images or losslessly
transformed (with the exception of lossless cropping.) They cannot
be partially decompressed or decompressed into planar YUV images.
Note also that TJBench, due to its lack of support for imperfect
transforms, requires that the subsampling type be known when
rotating, flipping, or transversely transposing an image. Addresses
#436
- The Java version of TJBench now has identical functionality to the C
version. This was accomplished by (somewhat hackishly) calling the
TurboJPEG C image I/O functions through JNI and copying the pixels
between the C heap and the Java heap.
- Add parameters (TJ*PARAM_RESTARTROWS and TJ*PARAM_RESTARTBLOCKS) and
a TJBench option (-restart) to allow the restart marker interval to
be specified when compressing. Eliminate the undocumented TJ_RESTART
environment variable.
- Add a parameter (TJ*PARAM_OPTIMIZE), a transform option
(TJ*OPT_OPTIMIZE), and a TJBench option (-optimize) to allow
optimized baseline Huffman coding to be specified when compressing.
Eliminate the undocumented TJ_OPTIMIZE environment variable.
- Add parameters (TJ*PARAM_XDENSITY, TJ*PARAM_DENSITY, and
TJ*DENSITYUNITS) to allow the pixel density to be specified when
compressing or saving a Windows BMP image and to be queried when
decompressing or loading a Windows BMP image. Addresses #77.
- Refactor the fuzz targets to use the new API.
* Extend decompression coverage to 12-bit and 16-bit data precision.
* Replace the awkward cjpeg12 and cjpeg16 targets with proper
TurboJPEG-based compress12, compress12-lossless, and
compress16-lossless targets
- Fix innocuous UBSan warnings uncovered by the new fuzzers.
- Implement previous versions of the TurboJPEG API by wrapping the new
functions (tested by running the 2.1.x versions of TJBench, via
tjbenchtest, and TJUnitTest against the new implementation.)
* Remove all JNI functions for deprecated Java methods and implement
the deprecated methods using pure Java wrappers. It should be
understood that backward API compatibility in Java applies only to
the Java classes and that one cannot mix and match a JAR file from
one version of libjpeg-turbo with a JNI library from another
version.
- tj3Destroy() now silently accepts a NULL handle.
- tj3Alloc() and tj3Free() now return/accept void pointers, as malloc()
and free() do.
- The image I/O functions now accept a TurboJPEG instance handle, which
is used to transmit/receive parameters and to receive error
information.
Closes #517
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155a8b03
|
2023-01-16T17:02:01
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|
Merge branch 'main' into dev
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0c0df2d0
|
2023-01-16T16:52:46
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|
TJDecompressor.java: "YUV" = "planar YUV"
(Oversight from 9a146f0f23b01869e1bf7c478e12b43f83d59c32)
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d4589f4f
|
2023-01-14T18:07:53
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|
Merge branch 'main' into dev
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9a146f0f
|
2023-01-06T10:29:10
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|
TurboJPEG: Numerous documentation improvements
- Wordsmithing, formatting, and grammar tweaks
- Various clarifications and corrections, including specifying whether
a particular buffer or image is used as a source or destination
- Accommodate/mention features that were introduced since the API
documentation was created.
- For clarity, use "packed-pixel" to describe uncompressed
source/destination images that are not planar YUV.
- Use "row" rather than "line" to refer to a single horizontal group of
pixels or component values, for consistency with the libjpeg API
documentation. (libjpeg also uses "scanline", which is a more archaic
term.)
- Use "alignment" rather than "padding" to refer to the number of bytes
by which a row's width is evenly divisible. This consistifies the
documention of the YUV functions and tjLoadImage(). ("Padding"
typically refers to the number of bytes added to each row, which is
not the same thing.)
- Remove all references to "the underlying codec." Although the
TurboJPEG API originated as a cross-platform wrapper for the Intel
Integrated Performance Primitives, Sun mediaLib, QuickTime, and
libjpeg, none of those TurboJPEG implementations has been maintained
since 2009. Nothing would prevent someone from implementing the
TurboJPEG API without libjpeg-turbo, but such an implementation would
not necessarily have an "underlying codec." (It could be fully
self-contained.)
- Use "destination image" rather than "output image", for consistency,
or describe the type of image that will be output.
- Avoid the term "image buffer" and instead use "byte buffer" to
refer to buffers that will hold JPEG images, or describe the type of
image that will be contained in the buffer. (The Java documentation
doesn't use "byte buffer", because the buffer arrays literally have
"byte" in front of them, and since Java doesn't have pointers, it is
not possible for mere mortals to store any other type of data in those
arrays.)
- C: Use "unified" to describe YUV images stored in a single buffer, for
consistency with the Java documentation.
- Use "planar YUV" rather than "YUV planar". Is is our convention to
describe images using {component layout} {colorspace/pixel format}
{image function}, e.g. "packed-pixel RGB source image" or "planar YUV
destination image."
- C: Document the TurboJPEG API version in which a particular function
or macro was introduced, and reorder the backward compatibility
function stubs in turbojpeg.h alphabetically by API version.
- C: Use Markdown rather than HTML tags, where possible, in the Doxygen
comments.
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98ff1fd1
|
2022-11-21T20:57:39
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|
TurboJPEG: Add lossless JPEG detection capability
Add a new TurboJPEG C API function (tjDecompressHeader4()) and Java API
method (TJDecompressor.getFlags()) that return the bitwise OR of any
flags that are relevant to the JPEG image being decompressed (currently
TJFLAG_PROGRESSIVE, TJFLAG_ARITHMETIC, TJFLAG_LOSSLESS, and their Java
equivalents.) This allows a calling program to determine whether the
image being decompressed is a lossless JPEG image, which means that the
decompression scaling feature will not be available and that a
full-sized destination buffer should be allocated.
More specifically, this fixes a buffer overrun in TJBench, TJExample,
and the decompress* fuzz targets that occurred when attempting (in vain)
to decompress a lossless JPEG image with decompression scaling enabled.
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25ccad99
|
2022-11-16T15:57:25
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TurboJPEG: 8-bit lossless JPEG support
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6002720c
|
2022-11-15T23:10:35
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TurboJPEG: Opt. enable arithmetic entropy coding
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931884e7
|
2022-08-08T15:41:01
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Java: Remove deprecated fields, ctors, and methods
Most of these have been deprecated since libjpeg-turbo 1.4.x.
It's time.
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ba22c0f7
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2022-06-24T14:03:03
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tjDecompressHeader3(): Accept tables-only streams
Inspired by:
https://github.com/amyspark/libjpeg-turbo/commit/b3b15cfe74cf07914122e26cf1e408a9a9cf3135
Closes #604
Closes #605
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c81e91e8
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2021-04-05T16:08:22
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TurboJPEG: New flag for limiting prog JPEG scans
This also fixes timeouts reported by OSS-Fuzz.
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53bb9418
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2018-05-15T14:51:49
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Java: Reformat code per checkstyle recommendations
... and modify tjbench.c to match the variable name changes made to
TJBench.java
("checkstyle" = http://checkstyle.sourceforge.net, not our regex-based
checkstyle script)
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dc4b9002
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2017-11-16T20:43:12
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TurboJPEG: Add alpha offset array/method
Also, set the red/green/blue offsets for TJPF_GRAY to -1 rather than 0.
It was undefined behavior for an application to use those arrays/methods
with TJPF_GRAY anyhow, and this makes it easier for applications to
programmatically detect whether a given pixel format has red, green, and
blue components.
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dadebcd7
|
2017-06-28T11:43:08
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TurboJPEG: Add "copy none", progressive xform opts
Allow progressive entropy coding to be enabled on a
transform-by-transform basis, and implement a new transform option for
disabling the copying of markers.
Closes #153
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aba6ae59
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2017-06-27T13:24:08
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TurboJPEG: Opt. enable progressive entropy coding
Fulfills part of the feature request in #153. Also paves the way for
SIMD-accelerated progressive Huffman coding (refer to #46.)
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d4092f6b
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2017-06-27T10:54:21
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TurboJPEG: Improve error handling
- Provide a new C API function and TJException method that allows
calling programs to query the severity of a compression/decompression/
transform error.
- Provide a new flag that instructs the library to immediately stop
compressing/decompressing/transforming if a warning is encountered.
Fixes #151
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739edeb8
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2015-07-21T09:34:02
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Further exception cleanup
Use a new checked exception type (TJException) when passing through
errors from the underlying C library. This gives the application a
choice of catching all exceptions or just those from TurboJPEG.
Throw IllegalArgumentException at the JNI level when arguments to the
JNI function are incorrect, and when one of the TurboJPEG "utility"
functions returns an error (because, per the C API specification, those
functions will only return an error if one of their arguments is out of
range.)
Remove "throws Exception" from the signature of any methods that no
longer pass through an error from the TurboJPEG C library.
Credit Viktor for the new code
Code formatting tweaks
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40dd3146
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2014-08-17T12:23:49
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|
Refactored YUVImage Java class so that it supports both unified YUV image buffers as well as separate YUV image planes; modified the JNI functions accordingly and added new helper functions to the TurboJPEG C API (tjPlaneWidth(), tjPlaneHeight(), tjPlaneSizeYUV()) to facilitate those modifications; changed potentially confusing "component width" and "component height" terms to "plane width" and "plane height" and modified variable names in turbojpeg.c to reflect this; numerous other documentation tweaks
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1360 632fc199-4ca6-4c93-a231-07263d6284db
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493be617
|
2014-08-10T20:12:17
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|
Clean up and consolidate notes regarding the YUV image format. This also corrects a factual error regarding the padding of the luminance plane-- because we now support 4:1:1, the component width is not necessarily padded to the nearest multiple of 2 if horizontal subsampling is used.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1342 632fc199-4ca6-4c93-a231-07263d6284db
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7a6ed075
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2014-03-17T11:14:52
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|
Extend YUVImage class to allow reuse of the same buffer with different metadata; port TJBench changes that treat YUV encoding/decoding as an intermediate step of the JPEG compression/decompression pipeline rather than a separate test case; add YUV encode/decode tests to the Java version of tjbenchtest
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1184 632fc199-4ca6-4c93-a231-07263d6284db
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6ffed933
|
2014-03-16T23:12:25
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|
Generate the Java documentation using javadoc 7, to improve readability.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1178 632fc199-4ca6-4c93-a231-07263d6284db
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fc26b657
|
2014-03-16T22:56:26
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|
Extend the YUV decode functionality to the TurboJPEG Java API, and port the TJUnitTest modifications that treat YUV encoding/decoding as an intermediate step of the JPEG compression/decompression pipeline rather than a separate test case; Add the ability to encode YUV images from an arbitrary position in a large image buffer; Significantly refactor the handling of YUV images; numerous doc tweaks; other Java API cleanup and usability improvements
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1176 632fc199-4ca6-4c93-a231-07263d6284db
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aa255e29
|
2014-03-16T18:43:42
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|
Doc tweaks
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1173 632fc199-4ca6-4c93-a231-07263d6284db
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bcb5f023
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2014-03-16T18:00:59
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Go ahead and deprecate the old constructor in 1.3.1 instead of in 1.4, since it uses a deprecated method
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1172 632fc199-4ca6-4c93-a231-07263d6284db
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b1481394
|
2014-03-14T08:53:33
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Streamline the BufferedImage functionality in the compressor so that it works the same way as compressing a "normal" image, and deprecate the old BufferedImage methods and other redundant methods. Eliminate the use of deprecated features in the test programs.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1168 632fc199-4ca6-4c93-a231-07263d6284db
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a15f19f2
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2014-03-11T09:46:50
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Wordsmithing & formatting tweaks
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1154 632fc199-4ca6-4c93-a231-07263d6284db
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07e982d9
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2013-10-31T07:11:39
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Deprecate and undocument the FORCE{MMX|SSE|SSE2|SSE3} flags. These were originally introduced in TurboJPEG/IPP as a way to override the automatic CPU selection in the underlying IPP codec, which was closed source. They are not meaningful anymore, since libjpeg-turbo provides environment variables to accomplish the same thing and since it no longer necessarily uses x86 SIMD code behind the scenes.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1072 632fc199-4ca6-4c93-a231-07263d6284db
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1e67274b
|
2013-10-31T05:04:51
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Extend the TurboJPEG Java API to support compressing JPEG images from YUV planar images
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1071 632fc199-4ca6-4c93-a231-07263d6284db
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aba7ceda
|
2013-08-23T07:13:59
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Oops. Forgot to implement access method for the colorspace & extend TJBench
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1022 632fc199-4ca6-4c93-a231-07263d6284db
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38cb1ec2
|
2013-08-23T04:45:43
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Add CMYK support to the TurboJPEG Java API & clean up a few things in the C API
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1020 632fc199-4ca6-4c93-a231-07263d6284db
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a5830628
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2013-08-18T11:04:21
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Add 4:1:1 subsampling support in the TurboJPEG Java API
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1017 632fc199-4ca6-4c93-a231-07263d6284db
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ae92418c
|
2013-08-18T10:47:07
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Add note regarding the fact that 4:4:0 lacks full SIMD support; Add an option for benchmarking 4:4:0 subsampling in TJBench; Wordsmithing; Disable timestamp in generated HTML files to make diffing and merging easier
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1016 632fc199-4ca6-4c93-a231-07263d6284db
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f82b9f96
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2013-08-18T10:39:30
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Add note regarding the fact that 4:4:0 lacks full SIMD support; Add an option for benchmarking 4:4:0 subsampling in TJBench; Wordsmithing; Disable timestamp in generated HTML files to make diffing and merging easier
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1015 632fc199-4ca6-4c93-a231-07263d6284db
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fef9852d
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2013-04-28T01:32:52
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Extend the TurboJPEG Java API to support generating YUV images with arbitrary padding and to support image scaling when decompressing to YUV
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@975 632fc199-4ca6-4c93-a231-07263d6284db
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65d4a46d
|
2013-04-27T01:06:52
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Java doc tweaks
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@966 632fc199-4ca6-4c93-a231-07263d6284db
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fac3bea8
|
2012-09-24T02:27:55
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Add a Java version of TJBench and extend the TurboJPEG Java API to support it (this involved adding a polymorphic method in TJCompressor that accepts x and y offsets into a larger buffer, similar to the previous modification that had been done to TJDecompressor.)
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@862 632fc199-4ca6-4c93-a231-07263d6284db
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73d74c13
|
2012-06-29T23:46:38
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Add flags to the TurboJPEG API that allow the caller to force the use of either the fast or the accurate DCT/IDCT algorithms in the underlying codec.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@851 632fc199-4ca6-4c93-a231-07263d6284db
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fd3aba35
|
2012-06-29T23:14:48
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Added flags to the TurboJPEG API that allow the caller to force the use of either the fast or the accurate DCT/IDCT algorithms in the underlying codec.
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.2.x@849 632fc199-4ca6-4c93-a231-07263d6284db
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f659f43f
|
2012-06-06T08:41:06
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Add x, y parameters to TJDecompressor so that it can be used to decompress to an arbitrary position in the destination image (TurboVNC needs this.)
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@832 632fc199-4ca6-4c93-a231-07263d6284db
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67ce3b23
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2011-12-19T02:21:03
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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
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80803ae5
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2011-12-15T13:12:59
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"which"="that"
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@730 632fc199-4ca6-4c93-a231-07263d6284db
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f5467110
|
2011-09-20T05:02:19
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Implement custom filter callback in Java
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@707 632fc199-4ca6-4c93-a231-07263d6284db
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9b49f0e4
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2011-07-12T03:17:23
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Re-work TJBUFSIZE() to take into account the level of chrominance subsampling
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@668 632fc199-4ca6-4c93-a231-07263d6284db
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b2f9415a
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2011-04-02T02:09:03
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Slight refactor to put ScalingFactor into its own class (mainly because the $ in the class name was wreaking havoc on the build scripts, but also to add a few convenience methods to it) and to create a separate loader class so we can provide a .jar file with the MinGW distribution that loads the correct DLL
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@557 632fc199-4ca6-4c93-a231-07263d6284db
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2c74e512
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2011-03-16T00:02:53
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More Java API cleanup
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@519 632fc199-4ca6-4c93-a231-07263d6284db
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92549de2
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2011-03-15T20:52:02
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Java code cleanup + Java docs
git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@518 632fc199-4ca6-4c93-a231-07263d6284db
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