LICENSE

Valve, the Valve logo, Half-Life, the Half-Life logo, the Lambda logo, Steam,
the Steam logo, Team Fortress, the Team Fortress logo, Opposing Force, Day of
Defeat, the Day of Defeat logo, Counter-Strike, the Counter-Strike logo, Source,
the Source logo, Counter-Strike: Condition Zero, Portal, the Portal logo, Dota,
the Dota 2 logo, and Defense of the Ancients are trademarks and/or registered
trademarks of Valve Corporation. All other trademarks are property of their
respective owners. See https://store.steampowered.com/legal for Valve Corporation legal details.

The Source 1 license applies to all parts of repository that are not explicitly
marked with other licenses or externally maintained libraries.

"""
     SOURCE 1 SDK LICENSE

  Source SDK Copyright(c) Valve Corp.  

  THIS DOCUMENT DESCRIBES A CONTRACT BETWEEN YOU AND VALVE 
  CORPORATION ("Valve").  PLEASE READ IT BEFORE DOWNLOADING OR USING 
  THE SOURCE ENGINE SDK ("SDK"). BY DOWNLOADING AND/OR USING THE 
  SOURCE ENGINE SDK YOU ACCEPT THIS LICENSE. IF YOU DO NOT AGREE TO 
  THE TERMS OF THIS LICENSE PLEASE DON'T DOWNLOAD OR USE THE SDK.  

  You may, free of charge, download and use the SDK to develop a modified Valve game 
  running on the Source engine.  You may distribute your modified Valve game in source and 
  object code form, but only for free. Terms of use for Valve games are found in the Steam 
  Subscriber Agreement located here: https://store.steampowered.com/subscriber_agreement/

  You may copy, modify, and distribute the SDK and any modifications you make to the 
  SDK in source and object code form, but only for free.  Any distribution of this SDK must 
  include this LICENSE file and thirdpartylegalnotices.txt.  

  Any distribution of the SDK or a substantial portion of the SDK must include the above 
  copyright notice and the following: 

      DISCLAIMER OF WARRANTIES.  THE SOURCE SDK AND ANY 
      OTHER MATERIAL DOWNLOADED BY LICENSEE IS PROVIDED 
      "AS IS".  VALVE AND ITS SUPPLIERS DISCLAIM ALL 
      WARRANTIES WITH RESPECT TO THE SDK, EITHER EXPRESS 
      OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, IMPLIED 
      WARRANTIES OF MERCHANTABILITY, NON-INFRINGEMENT, 
      TITLE AND FITNESS FOR A PARTICULAR PURPOSE.  

      LIMITATION OF LIABILITY.  IN NO EVENT SHALL VALVE OR 
      ITS SUPPLIERS BE LIABLE FOR ANY SPECIAL, INCIDENTAL, 
      INDIRECT, OR CONSEQUENTIAL DAMAGES WHATSOEVER 
      (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF 
      BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF 
      BUSINESS INFORMATION, OR ANY OTHER PECUNIARY LOSS) 
      ARISING OUT OF THE USE OF OR INABILITY TO USE THE 
      ENGINE AND/OR THE SDK, EVEN IF VALVE HAS BEEN 
      ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.  

  If you would like to use the SDK for a commercial purpose, please contact Valve at 
  sourceengine@valvesoftware.com.
"""

Externally maintained by Source 1 libraries are:

- bink2 located at thirdparty/bink is licensed as:
"""
  RAD Game Tools.

  See https://www.radgametools.com/bnkmain.htm
"""

- bzip2 located at thirdparty/bzip2 is licensed as:
"""
  This program, "bzip2", the associated library "libbzip2", and all
  documentation, are copyright (C) 1996-2019 Julian R Seward.  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
     notice, this list of conditions and the following disclaimer.

  2. The origin of this software must not be misrepresented; you must 
     not claim that you wrote the original software.  If you use this 
     software in a product, an acknowledgment in the product 
     documentation would be appreciated but is not required.

  3. Altered source versions must be plainly marked as such, and must
     not be misrepresented as being the original software.

  4. The name of the author may not be used to endorse or promote 
     products derived from this software without specific prior written 
     permission.

  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  Julian Seward, jseward@acm.org
  bzip2/libbzip2 version 1.0.8 of 13 July 2019
"""

- celt located at thirdparty/celt is licensed as:
"""
  Copyright 2001-2009 Jean-Marc Valin, Timothy B. Terriberry,
                    CSIRO, and other contributors

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  
  - Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
  
  - Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

- cryptopp located at thirdparty/cryptopp is licensed as:
"""
  Compilation Copyright (c) 1995-2019 by Wei Dai.  All rights reserved.
  This copyright applies only to this software distribution package
  as a compilation, and does not imply a copyright on any particular
  file in the package.
  
  All individual files in this compilation are placed in the public domain by
  Wei Dai and other contributors.
  
  I would like to thank the following authors for placing their works into
  the public domain:
  
  Joan Daemen - 3way.cpp
  Leonard Janke - cast.cpp, seal.cpp
  Steve Reid - cast.cpp
  Phil Karn - des.cpp
  Andrew M. Kuchling - md2.cpp, md4.cpp
  Colin Plumb - md5.cpp
  Seal Woods - rc6.cpp
  Chris Morgan - rijndael.cpp
  Paulo Baretto - rijndael.cpp, skipjack.cpp, square.cpp
  Richard De Moliner - safer.cpp
  Matthew Skala - twofish.cpp
  Kevin Springle - camellia.cpp, shacal2.cpp, ttmac.cpp, whrlpool.cpp, ripemd.cpp
  Ronny Van Keer - sha3.cpp
  Aumasson, Neves, Wilcox-O'Hearn and Winnerlein - blake2.cpp, blake2b_simd.cpp, blake2s_simd.cpp
  Aaram Yun - aria.cpp, aria_simd.cpp
  Han Lulu, Markku-Juhani O. Saarinen - sm4.cpp sm4_simd.cpp
  Daniel J. Bernstein, Jack Lloyd - chacha.cpp, chacha_simd.cpp, chacha_avx.cpp
  Andrew Moon - ed25519, x25519, donna_32.cpp, donna_64.cpp, donna_sse.cpp
  
  The Crypto++ Library uses portions of Andy Polyakov's CRYPTOGAMS on Linux
  for 32-bit ARM with files aes_armv4.S, sha1_armv4.S and sha256_armv4.S.
  CRYPTOGAMS is dual licensed with a permissive BSD-style license. The
  CRYPTOGAMS license is reproduced below. You can disable Cryptogams code by
  undefining the relevant macros in config_asm.h.
  
  The Crypto++ Library uses portions of Jack Lloyd's Botan for ChaCha SSE2 and
  AVX. Botan placed the code in public domain for Crypto++ to use.
  
  The Crypto++ Library (as a compilation) is currently licensed under the Boost
  Software License 1.0 (http://www.boost.org/users/license.html).
  
  Boost Software License - Version 1.0 - August 17th, 2003
  
  Permission is hereby granted, free of charge, to any person or organization
  obtaining a copy of the software and accompanying documentation covered by
  this license (the "Software") to use, reproduce, display, distribute,
  execute, and transmit the Software, and to prepare derivative works of the
  Software, and to permit third-parties to whom the Software is furnished to
  do so, all subject to the following:
  
  The copyright notices in the Software and this entire statement, including
  the above license grant, this restriction and the following disclaimer,
  must be included in all copies of the Software, in whole or in part, and
  all derivative works of the Software, unless such copies or derivative
  works are solely in the form of machine-executable object code generated by
  a source language processor.
  
  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, TITLE AND NON-INFRINGEMENT. IN NO EVENT
  SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
  FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  DEALINGS IN THE SOFTWARE.
  
  CRYPTOGAMS License
  
  Copyright (c) 2006-2017, CRYPTOGAMS by <appro@openssl.org>
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  
  * Redistributions of source code must retain copyright notices,
    this list of conditions and the following disclaimer.
  * Redistributions in binary form must reproduce the above
    copyright notice, this list of conditions and the following
    disclaimer in the documentation and/or other materials
    provided with the distribution.
  * Neither the name of the CRYPTOGAMS nor the names of its copyright
    holder and contributors may be used to endorse or promote products
    derived from this software without specific prior written permission.
"""

- DirectXMath located at thirdparty/DirectXMath is licensed as:
"""
  MIT License
  
  Copyright (c) Microsoft Corporation.
  
  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
"""

- libjpeg-turbo located at thirdparty/libjpeg-turbo is licensed as:
"""
  libjpeg-turbo Licenses
  ======================
  
  libjpeg-turbo is covered by three compatible BSD-style open source licenses:
  
  - The IJG (Independent JPEG Group) License, which is listed in
    [README.ijg](README.ijg)
  
    This license applies to the libjpeg API library and associated programs
    (any code inherited from libjpeg, and any modifications to that code.)
  
  - The Modified (3-clause) BSD License, which is listed below
  
    This license covers the TurboJPEG API library and associated programs, as
    well as the build system.
  
  - The [zlib License](https://opensource.org/licenses/Zlib)
  
    This license is a subset of the other two, and it covers the libjpeg-turbo
    SIMD extensions.
  
  
  Complying with the libjpeg-turbo Licenses
  =========================================
  
  This section provides a roll-up of the libjpeg-turbo licensing terms, to the
  best of our understanding.
  
  1.  If you are distributing a modified version of the libjpeg-turbo source,
      then:
  
      1.  You cannot alter or remove any existing copyright or license notices
          from the source.
  
          **Origin**
          - Clause 1 of the IJG License
          - Clause 1 of the Modified BSD License
          - Clauses 1 and 3 of the zlib License
  
      2.  You must add your own copyright notice to the header of each source
          file you modified, so others can tell that you modified that file (if
          there is not an existing copyright header in that file, then you can
          simply add a notice stating that you modified the file.)
  
          **Origin**
          - Clause 1 of the IJG License
          - Clause 2 of the zlib License
  
      3.  You must include the IJG README file, and you must not alter any of the
          copyright or license text in that file.
  
          **Origin**
          - Clause 1 of the IJG License
  
  2.  If you are distributing only libjpeg-turbo binaries without the source, or
      if you are distributing an application that statically links with
      libjpeg-turbo, then:
  
      1.  Your product documentation must include a message stating:
  
          This software is based in part on the work of the Independent JPEG
          Group.
  
          **Origin**
          - Clause 2 of the IJG license
  
      2.  If your binary distribution includes or uses the TurboJPEG API, then
          your product documentation must include the text of the Modified BSD
          License (see below.)
  
          **Origin**
          - Clause 2 of the Modified BSD License
  
  3.  You cannot use the name of the IJG or The libjpeg-turbo Project or the
      contributors thereof in advertising, publicity, etc.
  
      **Origin**
      - IJG License
      - Clause 3 of the Modified BSD License
  
  4.  The IJG and The libjpeg-turbo Project do not warrant libjpeg-turbo to be
      free of defects, nor do we accept any liability for undesirable
      consequences resulting from your use of the software.
  
      **Origin**
      - IJG License
      - Modified BSD License
      - zlib License
  
  
  The Modified (3-clause) BSD License
  ===================================
  
  Copyright (C)2009-2023 D. R. Commander.  All Rights Reserved.<br>
  Copyright (C)2015 Viktor Szathmry.  All Rights Reserved.
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are met:
  
  - Redistributions of source code must retain the above copyright notice,
    this list of conditions and the following disclaimer.
  - Redistributions in binary form must reproduce the above copyright notice,
    this list of conditions and the following disclaimer in the documentation
    and/or other materials provided with the distribution.
  - Neither the name of the libjpeg-turbo Project nor the names of its
    contributors may be used to endorse or promote products derived from this
    software without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS",
  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.
  
  
  Why Three Licenses?
  ===================
  
  The zlib License could have been used instead of the Modified (3-clause) BSD
  License, and since the IJG License effectively subsumes the distribution
  conditions of the zlib License, this would have effectively placed
  libjpeg-turbo binary distributions under the IJG License.  However, the IJG
  License specifically refers to the Independent JPEG Group and does not extend
  attribution and endorsement protections to other entities.  Thus, it was
  desirable to choose a license that granted us the same protections for new code
  that were granted to the IJG for code derived from their software.
"""

- libpng located at thirdparty/libpng is licensed as:
"""
  COPYRIGHT NOTICE, DISCLAIMER, and LICENSE
  =========================================
  
  PNG Reference Library License version 2
  ---------------------------------------
  
   * Copyright (c) 1995-2023 The PNG Reference Library Authors.
   * Copyright (c) 2018-2023 Cosmin Truta.
   * Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson.
   * Copyright (c) 1996-1997 Andreas Dilger.
   * Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
  
  The software is supplied "as is", without warranty of any kind,
  express or implied, including, without limitation, the warranties
  of merchantability, fitness for a particular purpose, title, and
  non-infringement.  In no event shall the Copyright owners, or
  anyone distributing the software, be liable for any damages or
  other liability, whether in contract, tort or otherwise, arising
  from, out of, or in connection with the software, or the use or
  other dealings in the software, even if advised of the possibility
  of such damage.
  
  Permission is hereby granted to use, copy, modify, and distribute
  this software, or portions hereof, for any purpose, without fee,
  subject to the following restrictions:
  
   1. The origin of this software must not be misrepresented; you
      must not claim that you wrote the original software.  If you
      use this software in a product, an acknowledgment in the product
      documentation would be appreciated, but is not required.
  
   2. Altered source versions must be plainly marked as such, and must
      not be misrepresented as being the original software.
  
   3. This Copyright notice may not be removed or altered from any
      source or altered source distribution.
  
  
  PNG Reference Library License version 1 (for libpng 0.5 through 1.6.35)
  -----------------------------------------------------------------------
  
  libpng versions 1.0.7, July 1, 2000, through 1.6.35, July 15, 2018 are
  Copyright (c) 2000-2002, 2004, 2006-2018 Glenn Randers-Pehrson, are
  derived from libpng-1.0.6, and are distributed according to the same
  disclaimer and license as libpng-1.0.6 with the following individuals
  added to the list of Contributing Authors:
  
      Simon-Pierre Cadieux
      Eric S. Raymond
      Mans Rullgard
      Cosmin Truta
      Gilles Vollant
      James Yu
      Mandar Sahastrabuddhe
      Google Inc.
      Vadim Barkov
  
  and with the following additions to the disclaimer:
  
      There is no warranty against interference with your enjoyment of
      the library or against infringement.  There is no warranty that our
      efforts or the library will fulfill any of your particular purposes
      or needs.  This library is provided with all faults, and the entire
      risk of satisfactory quality, performance, accuracy, and effort is
      with the user.
  
  Some files in the "contrib" directory and some configure-generated
  files that are distributed with libpng have other copyright owners, and
  are released under other open source licenses.
  
  libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
  Copyright (c) 1998-2000 Glenn Randers-Pehrson, are derived from
  libpng-0.96, and are distributed according to the same disclaimer and
  license as libpng-0.96, with the following individuals added to the
  list of Contributing Authors:
  
      Tom Lane
      Glenn Randers-Pehrson
      Willem van Schaik
  
  libpng versions 0.89, June 1996, through 0.96, May 1997, are
  Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
  and are distributed according to the same disclaimer and license as
  libpng-0.88, with the following individuals added to the list of
  Contributing Authors:
  
      John Bowler
      Kevin Bracey
      Sam Bushell
      Magnus Holmgren
      Greg Roelofs
      Tom Tanner
  
  Some files in the "scripts" directory have other copyright owners,
  but are released under this license.
  
  libpng versions 0.5, May 1995, through 0.88, January 1996, are
  Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
  
  For the purposes of this copyright and license, "Contributing Authors"
  is defined as the following set of individuals:
  
      Andreas Dilger
      Dave Martindale
      Guy Eric Schalnat
      Paul Schmidt
      Tim Wegner
  
  The PNG Reference Library is supplied "AS IS".  The Contributing
  Authors and Group 42, Inc. disclaim all warranties, expressed or
  implied, including, without limitation, the warranties of
  merchantability and of fitness for any purpose.  The Contributing
  Authors and Group 42, Inc. assume no liability for direct, indirect,
  incidental, special, exemplary, or consequential damages, which may
  result from the use of the PNG Reference Library, even if advised of
  the possibility of such damage.
  
  Permission is hereby granted to use, copy, modify, and distribute this
  source code, or portions hereof, for any purpose, without fee, subject
  to the following restrictions:
  
   1. The origin of this source code must not be misrepresented.
  
   2. Altered versions must be plainly marked as such and must not
      be misrepresented as being the original source.
  
   3. This Copyright notice may not be removed or altered from any
      source or altered source distribution.
  
  The Contributing Authors and Group 42, Inc. specifically permit,
  without fee, and encourage the use of this source code as a component
  to supporting the PNG file format in commercial products.  If you use
  this source code in a product, acknowledgment is not required but would
  be appreciated.
"""

- Miles Sound System 8.0b located at thirdparty/mss is licensed as:
"""
  Author: John Miles

  Contact RAD Game Tools at 425-893-4300 for technical support.
"""

- minimp3 located at thirdparty/minimp3 is licensed as:
"""
  CC0 1.0 Universal

  Statement of Purpose

  The laws of most jurisdictions throughout the world automatically confer
  exclusive Copyright and Related Rights (defined below) upon the creator and
  subsequent owner(s) (each and all, an "owner") of an original work of
  authorship and/or a database (each, a "Work").
  
  Certain owners wish to permanently relinquish those rights to a Work for the
  purpose of contributing to a commons of creative, cultural and scientific
  works ("Commons") that the public can reliably and without fear of later
  claims of infringement build upon, modify, incorporate in other works, reuse
  and redistribute as freely as possible in any form whatsoever and for any
  purposes, including without limitation commercial purposes. These owners may
  contribute to the Commons to promote the ideal of a free culture and the
  further production of creative, cultural and scientific works, or to gain
  reputation or greater distribution for their Work in part through the use and
  efforts of others.
  
  For these and/or other purposes and motivations, and without any expectation
  of additional consideration or compensation, the person associating CC0 with a
  Work (the "Affirmer"), to the extent that he or she is an owner of Copyright
  and Related Rights in the Work, voluntarily elects to apply CC0 to the Work
  and publicly distribute the Work under its terms, with knowledge of his or her
  Copyright and Related Rights in the Work and the meaning and intended legal
  effect of CC0 on those rights.
  
  1. Copyright and Related Rights. A Work made available under CC0 may be
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    ii. moral rights retained by the original author(s) and/or performer(s);
  
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    depicted in a Work;
  
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    subject to the limitations in paragraph 4(a), below;
  
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    vi. database rights (such as those arising under Directive 96/9/EC of the
    European Parliament and of the Council of 11 March 1996 on the legal
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    vii. other similar, equivalent or corresponding rights throughout the world
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  2. Waiver. To the greatest extent permitted by, but not in contravention of,
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  any other legal or equitable action to disrupt the quiet enjoyment of the Work
  by the public as contemplated by Affirmer's express Statement of Purpose.
  
  3. Public License Fallback. Should any part of the Waiver for any reason be
  judged legally invalid or ineffective under applicable law, then the Waiver
  shall be preserved to the maximum extent permitted taking into account
  Affirmer's express Statement of Purpose. In addition, to the extent the Waiver
  is so judged Affirmer hereby grants to each affected person a royalty-free,
  non transferable, non sublicensable, non exclusive, irrevocable and
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  the Work (i) in all territories worldwide, (ii) for the maximum duration
  provided by applicable law or treaty (including future time extensions), (iii)
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  of the date CC0 was applied by Affirmer to the Work. Should any part of the
  License for any reason be judged legally invalid or ineffective under
  applicable law, such partial invalidity or ineffectiveness shall not
  invalidate the remainder of the License, and in such case Affirmer hereby
  affirms that he or she will not (i) exercise any of his or her remaining
  Copyright and Related Rights in the Work or (ii) assert any associated claims
  and causes of action with respect to the Work, in either case contrary to
  Affirmer's express Statement of Purpose.
  
  4. Limitations and Disclaimers.
  
    a. No trademark or patent rights held by Affirmer are waived, abandoned,
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    b. Affirmer offers the Work as-is and makes no representations or warranties
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    c. Affirmer disclaims responsibility for clearing rights of other persons
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    d. Affirmer understands and acknowledges that Creative Commons is not a
    party to this document and has no duty or obligation with respect to this
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  For more information, please see
  <http://creativecommons.org/publicdomain/zero/1.0/>
"""

- mpaheaderinfo 2.2 located at thirdparty/mpaheaderinfo is licensed as:
"""
  GNU LESSER GENERAL PUBLIC LICENSE
  Version 3, 29 June 2007

  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>

  Everyone is permitted to copy and distribute verbatim copies of this license
  document, but changing it is not allowed.

  This version of the GNU Lesser General Public License incorporates the terms and
  conditions of version 3 of the GNU General Public License, supplemented by the
  additional permissions listed below.
"""

- openvr 0.9.11 located at thirdparty/openvr is licensed as:
"""
  Copyright (c) 2015, Valve Corporation
  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 notice, this
  list of conditions and the following disclaimer.

  2. Redistributions in binary form must reproduce the above copyright notice,
  this list of conditions and the following disclaimer in the documentation and/or
  other materials provided with the distribution.

  3. Neither the name of the copyright holder nor the names of its contributors
  may be used to endorse or promote products derived from this software without
  specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

- protobuf 2.6.1 located at thirdparty/protobuf-2.6.1 is licensed as:
"""
  Copyright 2008, Google Inc.
  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:

      * Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
      * Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following disclaimer
  in the documentation and/or other materials provided with the
  distribution.
      * Neither the name of Google Inc. nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  Code generated by the Protocol Buffer compiler is owned by the owner
  of the input file used when generating it.  This code is not
  standalone and requires a support library to be linked with it.  This
  support library is itself covered by the above license.
"""

- sdl3 located at thirdparty/sdl is licensed as:
"""
  Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
  
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.

  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:

  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required. 
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
"""

- snappy located at thirdparty/snappy is licensed as:
"""
  Copyright 2005 and onwards Google Inc.
 
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions are
  met:
 
      * Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
      * Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the following disclaimer
  in the documentation and/or other materials provided with the
  distribution.
      * Neither the name of Google Inc. nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.
 
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
  A light-weight compression algorithm.  It is designed for speed of
  compression and decompression, rather than for the utmost in space
  savings.
 
  For getting better compression ratios when you are compressing data
  with long repeated sequences or compressing data that is similar to
  other data, while still compressing fast, you might look at first
  using BMDiff and then compressing the output of BMDiff with
  Snappy.
"""

- speex located at thirdparty/speex is licensed as:
"""
  Copyright 2002-2008 	Xiph.org Foundation
  Copyright 2002-2008 	Jean-Marc Valin
  Copyright 2005-2007	Analog Devices Inc.
  Copyright 2005-2008	Commonwealth Scientific and Industrial Research
                          Organisation (CSIRO)
  Copyright 1993, 2002, 2006 David Rowe
  Copyright 2003 		EpicGames
  Copyright 1992-1994	Jutta Degener, Carsten Bormann
  
  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:
  
  - Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.
  
  - Redistributions in binary form must reproduce the above copyright
  notice, this list of conditions and the following disclaimer in the
  documentation and/or other materials provided with the distribution.
  
  - Neither the name of the Xiph.org Foundation nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
"""

- stb located at thirdparty/stb is licensed as:
"""
  This software is available under 2 licenses -- choose whichever you prefer.
  ------------------------------------------------------------------------------
  ALTERNATIVE A - MIT License
  Copyright (c) 2017 Sean Barrett
  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.
  ------------------------------------------------------------------------------
  ALTERNATIVE B - Public Domain (www.unlicense.org)
  This is free and unencumbered software released into the public domain.
  Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
  software, either in source code form or as a compiled binary, for any purpose,
  commercial or non-commercial, and by any means.
  In jurisdictions that recognize copyright laws, the author or authors of this
  software dedicate any and all copyright interest in the software to the public
  domain. We make this dedication for the benefit of the public at large and to
  the detriment of our heirs and successors. We intend this dedication to be an
  overt act of relinquishment in perpetuity of all present and future rights to
  this software under copyright law.
  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 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.
"""

- zlib located at thirdparty/zlib is licensed as:
"""
  Copyright notice:
  
  (C) 1995-2022 Jean-loup Gailly and Mark Adler
  
  This software is provided 'as-is', without any express or implied
  warranty.  In no event will the authors be held liable for any damages
  arising from the use of this software.
  
  Permission is granted to anyone to use this software for any purpose,
  including commercial applications, and to alter it and redistribute it
  freely, subject to the following restrictions:
  
  1. The origin of this software must not be misrepresented; you must not
     claim that you wrote the original software. If you use this software
     in a product, an acknowledgment in the product documentation would be
     appreciated but is not required.
  2. Altered source versions must be plainly marked as such, and must not be
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
  
  Jean-loup Gailly        Mark Adler
  jloup@gzip.org          madler@alumni.caltech.edu
"""