comparison vamp-sdk/hostext/PluginInputDomainAdapter.cpp @ 103:2cb46126ef59

* Attempt to clarify licensing implications of HAVE_FFTW3

     An API for audio analysis and feature extraction plugins.
 
     Centre for Digital Music, Queen Mary, University of London.
     Copyright 2006-2007 Chris Cannam and QMUL.
   
+    This file is based in part on Don Cross's public domain FFT
+    implementation.
+
     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

 /**
  * If you want to compile using FFTW instead of the built-in FFT
  * implementation for the PluginInputDomainAdapter, define HAVE_FFTW3
  * in the Makefile.
  *
- * Remember that FFTW is licensed under the GPL (unlike this SDK, which
- * is licensed liberally in order to permit closed-source usage), so
- * you should not define this symbol unless your code is also under the
- * GPL.  Also, parties redistributing this SDK for use in other
- * programs should be careful _not_ to define this symbol in order not
- * to affect the stated license of this SDK.
+ * Be aware that FFTW is licensed under the GPL -- unlike this SDK,
+ * which is provided under a more liberal BSD license in order to
+ * permit use in closed source applications.  The use of FFTW would
+ * mean that your code would need to be licensed under the GPL as
+ * well.  Do not define this symbol unless you understand and accept
+ * the implications of this.
+ *
+ * Parties such as Linux distribution packagers who redistribute this
+ * SDK for use in other programs should _not_ define this symbol, as
+ * it would change the effective licensing terms under which the SDK
+ * was available to third party developers.
+ *
+ * The default is not to use FFTW, and to use the built-in FFT instead.
  * 
- * Note: This code uses FFTW_MEASURE, and will perform badly on its
- * first invocation unless the host has saved and restored FFTW wisdom
- * (see the FFTW documentation).
+ * Note: The FFTW code uses FFTW_MEASURE, and so will perform badly on
+ * its first invocation unless the host has saved and restored FFTW
+ * wisdom (see the FFTW documentation).
  */
 #ifdef HAVE_FFTW3
 #include <fftw3.h>
 #endif