Add licensing information

See https://github.com/fluendo/docs.gstreamer.com/blob/master/README
for the licensing of the tutorial code and the documentation that
comes from the former sdk project.

6 files changed, 1062 insertions, 0 deletions

diff --git a/LICENSE.BSD b/LICENSE.BSD
new file mode 100644
index 0000000..52a1372
--- /dev/null
+++ b/LICENSE.BSD
@@ -0,0 +1,25 @@
+Copyright (C) GStreamer developers
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+1. Redistributions of source code must retain the above copyright
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diff --git a/LICENSE.CC-BY-SA-4.0 b/LICENSE.CC-BY-SA-4.0
new file mode 100644
index 0000000..1513d41
--- /dev/null
+++ b/LICENSE.CC-BY-SA-4.0
@@ -0,0 +1,348 @@
+Creative Commons Attribution-ShareAlike 4.0 International Public License
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diff --git a/LICENSE.LGPL-2.1 b/LICENSE.LGPL-2.1
new file mode 100644
index 0000000..e5ab03e
--- /dev/null
+++ b/LICENSE.LGPL-2.1
@@ -0,0 +1,502 @@
+                  GNU LESSER GENERAL PUBLIC LICENSE
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+  To apply these terms, attach the following notices to the library.  It is
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+
+    This library is free software; you can redistribute it and/or
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+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
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+    Lesser General Public License for more details.
+
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+
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+
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+  Ty Coon, President of Vice
+
+That's all there is to it!
diff --git a/LICENSE.MIT b/LICENSE.MIT
new file mode 100644
index 0000000..3f269e7
--- /dev/null
+++ b/LICENSE.MIT
@@ -0,0 +1,19 @@
+Copyright (C) GStreamer developers
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.
diff --git a/LICENSE.OPL b/LICENSE.OPL
new file mode 100644
index 0000000..503f851
--- /dev/null
+++ b/LICENSE.OPL
@@ -0,0 +1,137 @@
+Open Publication License
+v1.0, 8 June 1999
+
+
+I. REQUIREMENTS ON BOTH UNMODIFIED AND MODIFIED VERSIONS
+
+The Open Publication works may be reproduced and distributed in whole or in
+part, in any medium physical or electronic, provided that the terms of this
+license are adhered to, and that this license or an incorporation of it by
+reference (with any options elected by the author(s) and/or publisher) is
+displayed in the reproduction.
+
+Proper form for an incorporation by reference is as follows:
+
+    Copyright (c) <year> by <author's name or designee>. This material
+    may be distributed only subject to the terms and conditions set
+    forth in the Open Publication License, vX.Y or later (the latest
+    version is presently available at http://www.opencontent.org/openpub/).
+
+The reference must be immediately followed with any options elected by the
+author(s) and/or publisher of the document (see section VI).
+
+Commercial redistribution of Open Publication-licensed material is permitted.
+
+Any publication in standard (paper) book form shall require the citation of
+the original publisher and author. The publisher and author's names shall
+appear on all outer surfaces of the book. On all outer surfaces of the book
+the original publisher's name shall be as large as the title of the work
+and cited as possessive with respect to the title.
+
+
+II. COPYRIGHT
+
+The copyright to each Open Publication is owned by its author(s) or designee.
+
+
+III. SCOPE OF LICENSE
+
+The following license terms apply to all Open Publication works, unless
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+Mere aggregation of Open Publication works or a portion of an Open Publication
+work with other works or programs on the same media shall not cause this
+license to apply to those other works. The aggregate work shall contain a
+notice specifying the inclusion of the Open Publication material and
+appropriate copyright notice.
+
+SEVERABILITY. If any part of this license is found to be unenforceable in any
+jurisdiction, the remaining portions of the license remain in force.
+
+NO WARRANTY. Open Publication works are licensed and provided "as is" without
+warranty of any kind, express or implied, including, but not limited to, the
+implied warranties of merchantability and fitness for a particular purpose or
+a warranty of non-infringement.
+
+
+IV. REQUIREMENTS ON MODIFIED WORKS
+
+All modified versions of documents covered by this license, including
+translations, anthologies, compilations and partial documents, must meet
+the following requirements:
+
+    1. The modified version must be labeled as such.
+
+    2. The person making the modifications must be identified and the
+       modifications dated.
+
+    3. Acknowledgement of the original author and publisher if applicable
+       must be retained according to normal academic citation practices.
+
+    4. The location of the original unmodified document must be identified.
+
+    5. The original author's (or authors') name(s) may not be used to assert
+       or imply endorsement of the resulting document without the original
+       author's (or authors') permission.
+
+
+V. GOOD-PRACTICE RECOMMENDATIONS
+
+In addition to the requirements of this license, it is requested from and
+strongly recommended of redistributors that:
+
+    1. If you are distributing Open Publication works on hardcopy or CD-ROM,
+       you provide email notification to the authors of your intent to
+       redistribute at least thirty days before your manuscript or media freeze,
+       to give the authors time to provide updated documents. This notification
+       should describe modifications, if any, made to the document.
+
+    2. All substantive modifications (including deletions) be either clearly
+       marked up in the document or else described in an attachment to the
+       document.
+
+    3. Finally, while it is not mandatory under this license, it is considered
+       good form to offer a free copy of any hardcopy and CD-ROM expression of
+       an Open Publication-licensed work to its author(s).
+
+
+VI. LICENSE OPTIONS
+
+The author(s) and/or publisher of an Open Publication-licensed document may
+elect certain options by appending language to the reference to or copy of the
+license. These options are considered part of the license instance and must be
+included with the license (or its incorporation by reference) in derived works.
+
+A. To prohibit distribution of substantively modified versions without the
+explicit permission of the author(s). "Substantive modification" is defined
+as a change to the semantic content of the document, and excludes mere changes
+in format or typographical corrections.
+
+To accomplish this, add the phrase `Distribution of substantively modified
+versions of this document is prohibited without the explicit permission of
+the copyright holder.' to the license reference or copy.
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+in part in standard (paper) book form for commercial purposes is prohibited
+unless prior permission is obtained from the copyright holder.
+
+To accomplish this, add the phrase 'Distribution of the work or derivative of
+the work in any standard (paper) book form is prohibited unless prior
+permission is obtained from the copyright holder.' to the license reference
+or copy.
+
+
+OPEN PUBLICATION POLICY APPENDIX:
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+(This is not considered part of the license.)
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+Open Publication works are available in source format via the Open Publication
+home page at http://works.opencontent.org/.
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+Open Publication authors who want to include their own license on Open
+Publication works may do so, as long as their terms are not more restrictive
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+If you have questions about the Open Publication License, please contact
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+via email.
diff --git a/README.md b/README.md
index 9312211..26aff75 100644
--- a/README.md
+++ b/README.md
@@ -56,3 +56,34 @@ make
 ```
 xdg-open built_doc/html/index.html
 ```
+
+## Licensing
+
+The content of this module comes from a number of different sources and is
+licensed in different ways:
+
+### Tutorial source code
+
+All tutorial code is licensed under any of the following licenses (your choice):
+
+ - 2-clause BSD license ("simplified BSD license") (`LICENSE.BSD`)
+ - MIT license (`LICENSE.MIT`)
+ - LGPL v2.1 (`LICENSE.LGPL-2.1`)
+
+This means developers have maximum flexibility and can pick the right license
+for any derivative work.
+
+### Application Developer Manual and Plugin Writer's Guide
+
+These are licensed under the [Open Publication License v1.0][op-license]
+(`LICENSE.OPL`), for historical reasons.
+
+[op-license]: http://www.opencontent.org/openpub/
+
+### Documentation
+
+Mostly licensed under the [Creative Commons CC-BY-SA-4.0 license][cc-by-sa-4.0],
+but some parts of the documentation may still be licensed differently
+(e.g. LGPLv2.1) for historical reasons.
+
+[cc-by-sa-4.0]: https://creativecommons.org/licenses/by-sa/4.0/