| All PulseAudio source files, except as noted below, are licensed under the GNU |
| Lesser General Public License. (see file LGPL for details) |
| |
| However, the server side has optional GPL dependencies. These include the |
| libsamplerate and gdbm (core libraries), LIRC (lirc module) and FFTW (equalizer |
| module), although others may also be included in the future. If PulseAudio is |
| compiled with these optional components, this effectively downgrades the |
| license of the server part to GPL (see the file GPL for details), exercising |
| section 3 of the LGPL. In such circumstances, you should treat the client |
| library (libpulse) of PulseAudio as being LGPL licensed and the server part |
| (libpulsecore) as being GPL licensed. Since the PulseAudio daemon, tests, |
| various utilities/helpers and the modules link to libpulsecore and/or the afore |
| mentioned optional GPL dependencies they are of course also GPL licensed also |
| in this scenario. |
| |
| In addition to this, if D-Bus support is enabled, the PulseAudio client library |
| (libpulse) MAY need to be licensed under the GPL, depending on the license |
| adopted for libdbus. libdbus is licensed under either of the Academic Free |
| License 2.1 or GPL 2.0 or above. Which of these applies is your choice, and the |
| result affects the licensing of libpulse and thus, potentially, all programs |
| that link to libpulse. |
| |
| Andre Adrian's echo cancellation implementation is licensed under a less |
| restrictive license - see src/modules/echo-cancel/adrian-license.txt for |
| details. |
| |
| Some other files pulled into PA source (i.e. reference implementations that are |
| considered too small and stable to be considered as an external library) use the |
| more permissive MIT license. These include the device reservation DBus protocol |
| and realtime kit implementations. |
| |
| A more permissive BSD-style license is used for LFE filters, see |
| src/pulsecore/filter/LICENSE.WEBKIT for details. |
| |
| Additionally, a more permissive Sun license is used for code that performs |
| u-law, A-law and linear PCM conversions. |
| |
| While we attempt to provide a summary here, it is the ultimate responsibility of |
| the packager to ensure the components they use in their build of PulseAudio |
| meets their license requirements. |