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| 1 libjpeg-turbo is a JPEG image codec that uses SIMD instructions (MMX, SSE2, NEON
, AltiVec) to accelerate baseline JPEG compression and decompression on x86, x86
-64, ARM, and PowerPC systems. On such systems, libjpeg-turbo is generally 2-6x
as fast as libjpeg, all else being equal. On other types of systems, libjpeg-t
urbo can still outperform libjpeg by a significant amount, by virtue of its high
ly-optimized Huffman coding routines. In many cases, the performance of libjpeg
-turbo rivals that of proprietary high-speed JPEG codecs. |
| 2 |
| 3 libjpeg-turbo implements both the traditional libjpeg API as well as the less po
werful but more straightforward TurboJPEG API. libjpeg-turbo also features colo
rspace extensions that allow it to compress from/decompress to 32-bit and big-en
dian pixel buffers (RGBX, XBGR, etc.), as well as a full-featured Java interface
. |
| 4 |
| 5 libjpeg-turbo was originally based on libjpeg/SIMD, an MMX-accelerated derivativ
e of libjpeg v6b developed by Miyasaka Masaru. The TigerVNC and VirtualGL proje
cts made numerous enhancements to the codec in 2009, and in early 2010, libjpeg-
turbo spun off into an independent project, with the goal of making high-speed J
PEG compression/decompression technology available to a broader range of users a
nd developers. |
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