On Saturday 23 February 2019 17:59:57 Tanu Kaskinen wrote: > On Sat, 2019-02-23 at 16:06 +0100, Pali Rohár wrote: > > Hello, > > > > I would like to discuss about licence problems with usage of LDAC > > encoder libldac in pulseaudio. LDAC is a codec used by some Sony > > bluetooth headsets and it would be nice to have support for it after my > > patch series for Modular API for A2DP codecs is merged. > > > > There is only one released LDAC encoder. It is libldac which can be > > found at: https://android.googlesource.com/platform/external/libldac/ > > It is licensed under Apache License Version 2.0. > > > > If I understood correctly pulseaudio is licensed under LGPL v2.1 or > > later with some exceptions when some optional GPL dependences are > > enabled then server part is licensed under GPL v2 or later. So it can be > > distributed under GPL v3, right? Please correct me if I'm wrong. > > > > According to FSF https://www.gnu.org/licenses/license-list.html#apache2 > > Apache License Version 2.0 is compatible with GPL v3, but is > > incompatible with GPL v2. > > > > So, would it be feasible to write LDAC specific code for pulseaudio > > under GPL v3 license (in separate files) and make compile time option to > > enable/disable GPL v3 LDAC support? When enabled it would mean that > > compiled binary of puleaudio server and server modules are forced to be > > distributed under GPL v3 and thanks to compatibility with Apache License > > Version 2.0, it would be possible to use libdac library. When disabled > > then it would be like before (without LDAC and with license like > > before). Am I correct? > > Yes, I believe you're correct, and at least I am fine with adding LDAC > support via libldac. I asked people in SUSE and I got answer that it should be ok if there is no GPLv2-only code. So has pulseaudio some GPLv2-only code or is all code compatible with GPLv3 (i.e. GPLv2-or-later)? -- Pali Rohár pali.rohar@xxxxxxxxx
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