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Diffstat (limited to 'tbext/source/fftgrrev.cpp')
| -rw-r--r-- | tbext/source/fftgrrev.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/tbext/source/fftgrrev.cpp b/tbext/source/fftgrrev.cpp new file mode 100644 index 0000000..fd844f0 --- /dev/null +++ b/tbext/source/fftgrrev.cpp @@ -0,0 +1,160 @@ +/* Copyright (c) 2003 Tim Blechmann. */ +/* For information on usage and redistribution, and for a DISCLAIMER OF ALL */ +/* WARRANTIES, see the file, "COPYING" in this distribution. */ +/* */ +/* */ +/* fftgrshuf divides the incoming fft signal into single grains and reverses */ +/* the samples in every grain */ +/* */ +/* fftgrrev uses the flext C++ layer for Max/MSP and PD externals. */ +/* get it at http://www.parasitaere-kapazitaeten.de/PD/ext */ +/* thanks to Thomas Grill */ +/* */ +/* */ +/* */ +/* This program is free software; you can redistribute it and/or */ +/* modify it under the terms of the GNU General Public License */ +/* as published by the Free Software Foundation; either version 2 */ +/* of the License, or (at your option) any later version. */ +/* */ +/* See file LICENSE for further informations on licensing terms. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program; if not, write to the Free Software */ +/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +/* */ +/* Based on PureData by Miller Puckette and others. */ +/* */ +/* */ +/* */ +/* coded while listening to: Howard Skempton/John Tilbury: Well, well, Cornelius*/ +/* */ +/* */ + + + +#include <flext.h> +#include <algorithm> + +#if !defined(FLEXT_VERSION) || (FLEXT_VERSION < 401) +#error upgrade your flext version!!!!!! +#endif + +class fftgrrev: public flext_dsp +{ + FLEXT_HEADER(fftgrrev,flext_dsp); + +public: // constructor + fftgrrev(int); + +protected: + virtual void m_signal (int n, float *const *in, float *const *out); + void set_grains(t_int); + void set_offset(t_int); + void set_reverse(); + +private: + FLEXT_CALLBACK_1(set_grains,t_int) + FLEXT_CALLBACK_1(set_offset,t_int) + + t_int grains; + t_int grainsize; + t_int offset; + + t_int bs; //blocksize + t_int bs1; //bs+1 + + t_sample * data; //array with data + t_sample * d1; //1. element in array with data + t_sample * dend; //1 element after the last element + + + bool reverse; + +}; + + +FLEXT_LIB_DSP_1("fftgrrev~",fftgrrev,int) + +fftgrrev::fftgrrev(int arg): + grains(1),offset(0) +{ + bs=arg/2; + grainsize=bs; + bs1=bs+1; + post("blocksize: %i",bs); + + data = new t_sample[bs+1]; + + data[0]=0; + d1=data+1; + dend=data+bs+1; + + AddInSignal(); + AddOutSignal(); + FLEXT_ADDMETHOD_I(0,"grains",set_grains); + FLEXT_ADDMETHOD_I(0,"offset",set_offset); +} + +void fftgrrev::m_signal(int n, t_float * const *in, t_float *const *out) +{ + t_sample * ins = in[0]; + t_sample * outs = out[0]; + + if (offset>0) + { + CopySamples(d1+bs-offset,ins,offset); + CopySamples(d1,ins+offset,bs-offset); + } + else if (offset<0) + { + CopySamples(d1-offset,ins,bs+offset); + CopySamples(d1,ins+bs+offset,-offset); + } + else + CopySamples(data,ins,bs1); + + + //grains + + int counter=1; + + while (counter!=grains) + { + std::reverse(d1+grainsize*(counter-1),d1+grainsize*counter); + ++counter; + } + + std::reverse(d1+grainsize*(counter-1),dend); + + CopySamples(outs,data,bs1); +} + +void fftgrrev::set_offset(t_int o) +{ + if (o-bs<0 && o+bs>0) + { + offset=-o; + } + else + post("Offset out of range!"); +} + + +void fftgrrev::set_grains(t_int g) +{ + if ( (g > 0) ) + { + grains=g; + grainsize=(bs)/grains; + } +} + + + + |