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https://github.com/mpv-player/mpv
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474a7c26f2
Rename --enable-preliminary-lgpl2 to --enable-gpl. This concludes the relicensing. Some things are still to do (relicensing some still-GPL optional code), but we consider the code included by --enable-gpl to be fully relicensed. The relicensing was performed by asking every known author for permission for relicensing it to LGPL version 2.1 "or later". If an author could not be contacted or permission could not be obtained, and the contribution was considered relevant for copyright purposes, the affected code was either excluded from LGPL mode (not built), or removed or rewritten. This is the standard in open source relicensing processes. Keep in mind that using LGPL mode is still on the user's own risk. Even though I claim that the relicensing was pretty clean and thorough (measured on the standards of the open source community¹), and I followed the advice of some actual experts, there is still a residual uncertainty due to the fact that I'm not an all-knowing entity (authors could have taken someone else's code and pretend it's their own) nor a lawyer (meaning I might lack associated authority or expertise), and the fact that the judicial system is far from deterministic. The relicensing was performed merely to the best of my knowledge. I reject all responsibility outside of that. This commit also cleans up the "Copyright" file to reflect the finalized relicensing process. ¹ Not to imply that the standards of commercial companies are much higher. Some major tech companies get away with stuff I would not consider clean. See #2033.
120 lines
6.0 KiB
Plaintext
120 lines
6.0 KiB
Plaintext
mpv is a fork of mplayer2, which is a fork of MPlayer.
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mpv as a whole is licensed as GPL version 2 or later (see LICENSE). Most source
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files are GPLv2+, but some files are available under a more liberal license,
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such as LGPLv2.1+, BSD, MIT, ISC, and possibly others. Look at the copyright
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header of each source file, and grep the sources for "Copyright" if you need
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to know details. C source files without Copyright notice are licensed as
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LGPLv2.1+. Also see the list of files with specific licenses below (not all
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files can have a standard license header).
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All new contributions must be LGPLv2.1+ licensed. Using a more liberal license
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compatible to LGPLv2.1+ is also ok.
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If changes are done on GPL code, must come with the implicit agreement that the
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project can relicense the code to LGPLv2.1+ at a later point without asking the
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contributor. This is a safeguard for making potential relicensing of remaining
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GPL code to LGPLv2.1+ easier.
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For information about authors and contributors, consult the git log, which
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contains the complete SVN and CVS history as well.
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"v2.1+" in this context means "version 2.1 or later".
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Some libraries are GPLv2+ or GPLv3+ only. Building mpv with Samba support makes
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it GPLv3+.
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mpv can be built as LGPLv2.1+ with the --enable-lgpl configure option. To add
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a LGPL mode to mpv, MPlayer code had to be relicensed from GPLv2+ to LGPLv2.1+
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by asking the MPlayer authors for permission. Since permission could not be
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obtained from everyone, LGPL mode disables the following features, some of
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them quite central:
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- no audio filtering, which breaks: --volume, --af, replaygain, pitch
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correction, fine control about downmix/upmix/resampling behavior
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- Linux X11 video output
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- Linux audio output via ALSA (PulseAudio works)
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- BSD audio output via OSS
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- NVIDIA/Linux hardware decoding (vdpau, although CUDA usually works)
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- many builtin video filters (use libavfilter instead)
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- automatic rotation and stereoscopic video handling
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- Linux TV input
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- the --frames option
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- the add/cycle and sub-add/audio-add/sub-remove/audio-remove commands
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- video format conversion (if not supported by the VO)
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- minor features: jack, DVD, CDDA, SMB, CACA, legacy direct3d VO
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Some of these will be fixed in the future. The lack of the add/cycle commands
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makes this particularly useless for CLI mode, and most of the appeal of LGPL
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is for libmpv anyway. Thus it's not recommended to build mpv CLI in LGPL mode
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at all.
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The following files are still GPL only (--enable-lgpl disables them):
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audio/filter/* will be replaced with new filter chain
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audio/filter/af_format.c mostly LGPL (except af glue code)
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audio/filter/af_lavc3enc.c as above
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audio/filter/af_lavfi.c as above
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audio/filter/af_scaletempo.c as above
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audio/filter/af_rubberband.c as above
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audio/out/ao_alsa.c chaotic history, one later author did not decide
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audio/out/ao_jack.c will stay GPL
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audio/out/ao_oss.c will stay GPL
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audio/audio.* needed by af code only
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demux/demux_tv.c will stay GPL
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stream/ai_* will stay GPL (TV code)
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stream/audio_in.* will stay GPL (TV code)
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stream/dvb* must stay GPL
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stream/frequencies.* must stay GPL
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stream/stream_cdda.c unknown
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stream/stream_dvb.* must stay GPL
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stream/stream_dvd.c unknown
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stream/stream_dvd_common.* unknown
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stream/stream_dvdnav.c unknown
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stream/stream_smb.c will stay GPLv3
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stream/stream_tv.c will stay GPL
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stream/tv* will stay GPL
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video/filter/vf_crop.c will be deleted
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video/filter/vf_dsize.c will be deleted
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video/filter/vf_expand.c will be deleted
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video/filter/vf_flip.c will be deleted
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video/filter/vf_format.c will be deleted
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video/filter/vf_gradfun.c will be deleted
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video/filter/vf_mirror.c will be deleted
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video/filter/vf_noformat.c will be deleted
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video/filter/vf_pullup.c will be deleted
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video/filter/vf_rotate.c will be deleted
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video/filter/vf_scale.c will be deleted
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video/filter/vf_stereo3d.c will be deleted
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video/filter/vf_sub.c will be deleted
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video/filter/vf_yadif.c will be deleted
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video/out/opengl/hwdec_vaglx.c GPL
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video/out/vo_caca.c unknown
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video/out/vo_direct3d.c unknown
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video/out/vo_vaapi.c probably impossible (some company's code)
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video/out/vo_vdpau.c probably impossible (nVidia's code)
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video/out/vo_x11.c probably impossible
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video/out/vo_xv.c probably impossible
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video/out/x11_common.* probably impossible
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video/vdpau.c hard (GPL-only parts must be ifdefed)
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video/vdpau.h unknown
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video/vdpau_mixer.* actual code must be rewritten
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DOCS/man/ GPLv2+
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bootstrap.py unknown license, probably GPLv2+ or LGPLv2+
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etc/mplayer-input.conf unknown license, probably GPLv2+
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mpv.desktop unknown license, probably GPLv2+
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etc/restore-old-bindings.conf unkniwn license, probably GPLv2+
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The following files contain some optional GPL code (--enable-lgpl disables it):
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input/cmd_list.c potentially some commands
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demux/demux_mkv.c some verbose message
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options/options.c --frames option
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options/parse_commandline.c dvd:// expansion
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player/audio.c libaf glue code
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player/loadfile.c --frames option (minor but probably fatal)
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player/osd.c OSD level 3
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player/command.c add/cycle command, possibly sub-add command
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None of the exceptions listed above affect the final binary if it's built as
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LGPL. Linked libraries still can affect the final license (for example if
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FFmpeg was built as GPL).
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