00001 #ifndef NOISEGENERATOR_H 00002 #define NOISEGENERATOR_H 00003 /* 00004 * This is the Loris C++ Class Library, implementing analysis, 00005 * manipulation, and synthesis of digitized sounds using the Reassigned 00006 * Bandwidth-Enhanced Additive Sound Model. 00007 * 00008 * Loris is Copyright (c) 1999-2010 by Kelly Fitz and Lippold Haken 00009 * 00010 * This program is free software; you can redistribute it and/or modify 00011 * it under the terms of the GNU General Public License as published by 00012 * the Free Software Foundation; either version 2 of the License, or 00013 * (at your option) any later version. 00014 * 00015 * This program is distributed in the hope that it will be useful, 00016 * but WITHOUT ANY WARRANTY, without even the implied warranty of 00017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00018 * GNU General Public License for more details. 00019 * 00020 * You should have received a copy of the GNU General Public License 00021 * along with this program; if not, write to the Free Software 00022 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00023 * 00024 * 00025 * NoiseGenerator.h 00026 * 00027 * Definition of a class representing a gaussian noise generator, filtered and 00028 * used as a modulator in bandwidth-enhanced synthesis. 00029 * 00030 * Kelly Fitz, 5 June 2003 00031 * revised 11 October 2009 00032 * loris@cerlsoundgroup.org 00033 * 00034 * http://www.cerlsoundgroup.org/Loris/ 00035 * 00036 */ 00037 00038 // begin namespace 00039 namespace Loris { 00040 00041 // --------------------------------------------------------------------------- 00042 // class NoiseGenerator 00043 // 00044 class NoiseGenerator 00045 { 00046 // --- interface --- 00047 00048 public: 00049 00054 explicit NoiseGenerator( double initSeed = 1.0 ); 00055 00056 00057 // copy and assign are free 00058 00059 00063 void seed( double newSeed ); 00064 00065 // sample 00066 // 00073 double sample( void ); 00074 00078 double operator() ( void ) { return sample(); } 00079 00080 00081 // --- implementation --- 00082 private: 00083 00084 // random number generation helpers 00085 inline double uniform( void ); 00086 inline double gaussian_normal( void ); 00087 00088 00089 // random number generator state variables 00090 double m_useed; 00091 double m_gset; 00092 bool m_iset; 00093 00094 }; 00095 00096 00097 } // end of namespace Loris 00098 00099 #endif /* ndef NOISEGENERATOR_H */
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