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authorDiego Biurrun <diego@biurrun.de>2009-03-25 14:05:20 +0000
committerDiego Biurrun <diego@biurrun.de>2009-03-25 14:05:20 +0000
commitaae9c405c750f87798030a3be3ef4b41d9c27cb7 (patch)
treed3dc3fbe7b7e992d448239075cd8b7f96a6d7ac8
parente03b46184251ed469354f4f053b342be5a79980d (diff)
downloadffmpeg-aae9c405c750f87798030a3be3ef4b41d9c27cb7.tar.gz
Move licensing information into a separate file called LICENSE and
rewrite it for greater clarity in the process. Originally committed as revision 18185 to svn://svn.ffmpeg.org/ffmpeg/trunk
-rw-r--r--LICENSE37
-rw-r--r--README33
2 files changed, 38 insertions, 32 deletions
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000000..61a080778d
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,37 @@
+Most files in FFmpeg are under the GNU Lesser General Public License version 2.1
+or later (LGPL v2.1+). Read the file COPYING.LGPL for details. Some other files
+have a MIT/X11/BSD-style license. In combination the LGPL v2.1+ applies to
+FFmpeg.
+
+Some optional parts of FFmpeg are licensed under the GNU General Public License
+version 2 or later (GPL v2+). See the file COPYING.GPL for details. None of
+these parts are used by default, you have to explicitly pass --enable-gpl to
+configure to activate them. In this case, FFmpeg's license changes to GPL v2+.
+
+Specifically, the GPL parts of FFmpeg are
+
+- libpostproc
+- some x86 and AltiVec optimizations in libswscale
+- optional x86 optimizations in the files
+ libavcodec/x86/h264_deblock_sse2.asm
+ libavcodec/x86/h264_idct_sse2.asm
+ libavcodec/x86/idct_mmx.c
+- the AC-3 decoder in libavcodec/ac3dec.c
+- the X11 grabber in libavdevice/x11grab.c
+
+Some external libraries, e.g. libx264, are under GPL and can be used in
+conjunction with FFmpeg. They require --enable-gpl to be passed to configure
+as well.
+
+The nonfree external libraries libamrnb and libamrwb can be hooked up in FFmpeg.
+You need to pass --enable-nonfree to configure to enable them. Employ this
+option with care as FFmpeg then beomes nonfree and unredistributable.
+
+There are a handful of files under other licensing terms, namely:
+
+* The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c
+ are taken from libjpeg, see the top of the files for licensing details.
+
+* The file libavcodec/fdctref.c is copyrighted by the MPEG Software Simulation
+ Group with all rights reserved. It is only used to create a DCT test program
+ and not compiled into libavcodec.
diff --git a/README b/README
index 7f3be6dcce..e907e90223 100644
--- a/README
+++ b/README
@@ -9,35 +9,4 @@ FFmpeg README
2) Licensing
------------
-* Read the file COPYING.LGPL. FFmpeg and the associated libraries EXCEPT
- for libpostproc are licensed under the GNU Lesser General Public License
- version 2.1 or later.
-
-* libpostproc is distributed under the GNU General Public License version 2
- or later, see the file COPYING.GPL for details. Its compilation and use in
- FFmpeg is optional.
-
-* libswscale contains some optional processor-specific optimizations that are
- distributed under the GNU General Public License version 2 or later.
-
-* The files libavcodec/x86/idct_mmx.c, libavcodec/x86/h264_deblock_sse2.asm
- and libavcodec/x86/h264_idct_sse2.asm are distributed under the GNU General
- Public License version 2 or later. They are strictly optimizations and
- their use is optional.
-
-* The file libavcodec/ac3dec.c is distributed under the GNU General Public
- License version 2 or later. In order for (E-)AC-3 decoding to work you
- need to enable GPL components.
-
-* The file libavdevice/x11grab.c is distributed under the GNU General
- Public License version 2 or later. X11 grabbing is optional.
-
-* The files libavcodec/jfdctfst.c, libavcodec/jfdctint.c, libavcodec/jrevdct.c
- are taken from libjpeg, see the top of the files for licensing details.
-
-* The file libavcodec/fdctref.c is copyrighted by the MPEG Software Simulation
- Group with all rights reserved. It is only used to create a DCT test program
- and not compiled into libavcodec.
-
-* Some external libraries are under GPL. If you wish to use them with FFmpeg,
- you have to configure FFmpeg as GPL as well.
+* See the LICENSE file.