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4/8/2013

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libjpeg-turbo

1.2.1.201304081

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This package was approved by moderator mwrock on 10/26/2014.

libjpeg-turbo is a derivative of libjpeg that uses SIMD instructions (MMX, SSE2, NEON) to accelerate baseline JPEG compression and decompression on x86, x86-64, and ARM systems. On such systems, libjpeg-turbo is generally 2-4x as fast as the unmodified version of libjpeg, all else being equal.

libjpeg-turbo was originally based on libjpeg/SIMD by Miyasaka Masaru, but the TigerVNC and VirtualGL projects made numerous enhancements to the codec in 2009, including improved support for Mac OS X, 64-bit support, support for 32-bit and big-endian pixel formats (RGBX, XBGR, etc.), accelerated Huffman encoding/decoding, and various bug fixes. The goal was to produce a fully open-source codec that could replace the partially closed-source TurboJPEG/IPP codec used by VirtualGL and TurboVNC. libjpeg-turbo generally achieves 80-120% of the performance of TurboJPEG/IPP. It is faster in some areas but slower in others.

To install libjpeg-turbo, run the following command from the command line or from PowerShell:

C:\> choco install libjpeg-turbo

To upgrade libjpeg-turbo, run the following command from the command line or from PowerShell:

C:\> choco upgrade libjpeg-turbo

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Dependencies

This package has no dependencies.

Package Maintainer(s)

Software Author(s)

  • D. R. Commander

Copyright

D. R. Commander 2010-2012

Tags

Release Notes

A build issue encountered when using YASM on Unix systems was fixed.
An out-of-bounds read in the SSE2 SIMD code was fixed.
New colorspace extension constants that allow applications to specify that the unused byte in a 4-byte RGB buffer should be treated as an alpha channel when decompressing were added.
A regression issue encountered when building DevIL with libjpeg-turbo was fixed.
iOS support was added to the libjpeg-turbo SDK for Mac.

Version History

Version Downloads Last updated Status
libjpeg-turbo 1.2.1.20130404 281 Thursday, April 4, 2013  
libjpeg-turbo 1.2.1 3221 Thursday, September 13, 2012  

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