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* qatar/master: (22 commits) g723.1: do not pass large structs by value g723.1: do not bounce intermediate values via memory g723.1: declare a variable in the block it is used g723.1: avoid saving/restoring excitation g723.1: avoid unnecessary memcpy() in residual_interp() g723.1: make postfilter write directly to output buffer g723.1: drop unnecessary variable buf_ptr in formant_postfilter() g723.1: make scale_vector() output to a separate buffer g723.1: make autocorr_max() work on an arbitrary buffer g723.1: do not needlessly use int64_t g723.1: use saturating addition functions g723.1: optimise scale_vector() g723.1: remove useless uses of MUL64() g723.1: remove unnecessary argument 'shift' from dot_product() g723.1: deobfuscate "(x << 4) - x" to "15 * x" celp: optimise ff_celp_lp_synthesis_filter() libavutil: add saturating addition functions cllc: Implement ARGB support cllc: Add support for QRGB cllc: Rename some funcs to represent what they actually do ... Conflicts: LICENSE libavcodec/g723_1.c libavcodec/x86/Makefile Merged-by: Michael Niedermayer <michaelni@gmx.at>
79 lines
3.0 KiB
Plaintext
79 lines
3.0 KiB
Plaintext
FFmpeg:
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Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
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or later (LGPL v2.1+). Read the file COPYING.LGPLv2.1 for details. Some other
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files have MIT/X11/BSD-style licenses. In combination the LGPL v2.1+ applies to
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FFmpeg.
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Some optional parts of FFmpeg are licensed under the GNU General Public License
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version 2 or later (GPL v2+). See the file COPYING.GPLv2 for details. None of
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these parts are used by default, you have to explicitly pass --enable-gpl to
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configure to activate them. In this case, FFmpeg's license changes to GPL v2+.
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Specifically, the GPL parts of FFmpeg are
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- libpostproc
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- libmpcodecs
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- optional x86 optimizations in the files
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libavcodec/x86/idct_mmx.c
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- libutvideo encoding/decoding wrappers in
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libavcodec/libutvideo*.cpp
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- the X11 grabber in libavdevice/x11grab.c
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- the swresample test app in
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libswresample/swresample-test.c
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- the texi2pod.pl tool
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- the following filters in libavfilter:
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- vf_blackframe.c
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- vf_boxblur.c
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- vf_colormatrix.c
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- vf_cropdetect.c
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- vf_delogo.c
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- vf_hqdn3d.c
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- vf_mp.c
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- vf_super2xsai.c
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- vf_tinterlace.c
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- vf_yadif.c
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- vsrc_mptestsrc.c
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There are a handful of files under other licensing terms, namely:
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* The files libavcodec/jfdctfst.c, libavcodec/jfdctint_template.c and
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libavcodec/jrevdct.c are taken from libjpeg, see the top of the files for
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licensing details. Specifically note that you must credit the IJG in the
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documentation accompanying your program if you only distribute executables.
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You must also indicate any changes including additions and deletions to
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those three files in the documentation.
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Should you, for whatever reason, prefer to use version 3 of the (L)GPL, then
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the configure parameter --enable-version3 will activate this licensing option
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for you. Read the file COPYING.LGPLv3 or, if you have enabled GPL parts,
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COPYING.GPLv3 to learn the exact legal terms that apply in this case.
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external libraries
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==================
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FFmpeg can be combined with a number of external libraries, which sometimes
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affect the licensing of binaries resulting from the combination.
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compatible libraries
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--------------------
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The libcdio, libx264, libxavs and libxvid libraries are under GPL. When
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combining them with FFmpeg, FFmpeg needs to be licensed as GPL as well by
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passing --enable-gpl to configure.
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The OpenCORE and VisualOn libraries are under the Apache License 2.0. That
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license is incompatible with the LGPL v2.1 and the GPL v2, but not with
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version 3 of those licenses. So to combine these libraries with FFmpeg, the
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license version needs to be upgraded by passing --enable-version3 to configure.
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incompatible libraries
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----------------------
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The Fraunhofer AAC library, FAAC and aacplus are under licenses incompatible
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with all (L)GPL versions. Thus, unfortunately, since both licenses cannot be
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satisfied simultaneously, binaries resulting from the combination of FFmpeg
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with these libraries are nonfree und unredistributable. If you wish to enable
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any of these libraries nonetheless, pass --enable-nonfree to configure.
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