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a4425135a5
Some of the license wording was less than clear. Try to clarify the different GPL 'downgrade' scenarios but also be generic to ensure that those packagers where GPL is a problem check thoroughly before they ship. Inspired by comments from Brian Cameron @ Oracle via fdo#41822
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1.6 KiB
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30 lines
1.6 KiB
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All PulseAudio source files are licensed under the GNU Lesser General Public
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License. (see file LGPL for details)
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However, the server side has optional GPL dependencies. These include the
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libsamplerate (for core libraries) and bluez (for the bluetooth proximity helper
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program) libraries, although others may also be included in the future. If
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PulseAudio is compiled with these optional components, this effectively
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downgrades the license of the server part to GPL (see file GPL for details),
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exercising section 3 of the LGPL. In such circumstances, you should treat the
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client library (libpulse) of PulseAudio as being LGPL licensed and the server
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part (libpulsecore) as being GPL licensed. Since the PulseAudio daemon, tests,
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various utilities/helpers and the modules link to libpulsecore and/or the
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afore mentioned optional GPL dependencies they are of course also GPL licensed
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also in this scenario.
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Andre Adrian's echo cancellation implementation is licensed under a less
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restrictive license - see src/modules/echo-cancel/adrian-license.txt for
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details.
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Some other files pulled into PA source (i.e. reference implementations that are
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considered too small and stable to be considered as an external library) use the
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more permissive MIT license. This include the device reservation DBus protocol
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and realtime kit implementations.
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Additionally, a more permissive Sun license is used for code that performs
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u-law, A-law and linear PCM conversions.
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While we attempt to provide a summary here, it is the ultimate responsibility of
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the packager to ensure the components they use in their build of PulseAudio
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meets their license requirements.
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