Open source, commercial-grade real fast arithmetic coder, I have used in large-scale remote sensing image compression.

FastAC
......\FastAC
......\......\acfile
......\......\......\acfile.cpp
......\......\......\acfile.dsp
......\......\......\acfile.plg
......\......\acwav
......\......\.....\acwav.cpp
......\......\.....\acwav.dsp
......\......\.....\acwav.plg
......\......\AC_Versions
......\......\...........\floating-point
......\......\...........\..............\arithmetic_codec.cpp
......\......\...........\..............\arithmetic_codec.h
......\......\...........\int_32_32
......\......\...........\.........\arithmetic_codec.cpp
......\......\...........\.........\arithmetic_codec.h
......\......\...........\int_32_32_sorted
......\......\...........\................\arithmetic_codec.cpp
......\......\...........\................\arithmetic_codec.h
......\......\...........\int_32_64
......\......\...........\.........\arithmetic_codec.cpp
......\......\...........\.........\arithmetic_codec.h
......\......\arithmetic_codec.cpp
......\......\arithmetic_codec.h
......\......\bin
......\......\...\acfile.exe
......\......\...\acwav.exe
......\......\...\test.exe
......\......\...\test.ilk
......\......\FastAC.dsw
......\......\FastAC.ncb
......\......\FastAC.opt
......\......\FastAC_Comparisons.pdf
......\......\FastAC_QA.pdf
......\......\FastAC_Readme.pdf
......\......\test
......\......\....\codec_test.cpp
......\......\....\Debug
......\......\....\Release
......\......\....\test.dsp
......\......\....\test.plg
......\......\....\test_support.cpp
......\......\....\test_support.h

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