From 900871454af06db1d751e28cea56f59dc43d3c17 Mon Sep 17 00:00:00 2001 From: Thomas Grill Date: Wed, 8 Jan 2003 04:37:20 +0000 Subject: "" svn path=/trunk/; revision=328 --- externals/grill/fftease/src/ether~.cpp | 251 +++++++++++++++++++++++++++++++++ 1 file changed, 251 insertions(+) create mode 100644 externals/grill/fftease/src/ether~.cpp (limited to 'externals/grill/fftease/src/ether~.cpp') diff --git a/externals/grill/fftease/src/ether~.cpp b/externals/grill/fftease/src/ether~.cpp new file mode 100644 index 00000000..16fbaaff --- /dev/null +++ b/externals/grill/fftease/src/ether~.cpp @@ -0,0 +1,251 @@ +/* + +FFTease - A set of Live Spectral Processors +Originally written by Eric Lyon and Christopher Penrose for the Max/MSP platform + +Copyright (c)Thomas Grill (xovo@gmx.net) +For information on usage and redistribution, and for a DISCLAIMER OF ALL +WARRANTIES, see the file, "license.txt," in this distribution. + +*/ + +#include "main.h" +#include + +class ether: + public flext_dsp +{ + FLEXT_HEADER_S(ether,flext_dsp,setup) + +public: + ether(I argc,const t_atom *argv); + ~ether(); + +protected: + + virtual V m_dsp(I n,S *const *in,S *const *out); + virtual V m_signal(I n,S *const *in,S *const *out); + + I blsz; + F smprt; + + F *_input1,*_input2; + F *_buffer1,*_buffer2; + F *_channel1,*_channel2; + F *_output; + F *_trigland; + I *_bitshuffle; + F *_Wanal,*_Wsyn,*_Hwin; + + I _inCount,_nmult; + + // ----------------------------- + + BL _qual,_invert; + F _threshMult; + +private: + V Clear(); + V Delete(); + + static V setup(t_classid c); + + + FLEXT_ATTRVAR_B(_invert) + FLEXT_ATTRVAR_F(_threshMult) +}; + +FLEXT_LIB_DSP_V("fftease, ether~",ether) + + +V ether::setup(t_classid c) +{ + FLEXT_CADDATTR_VAR1(c,"invert",_invert); + FLEXT_CADDATTR_VAR1(c,"thresh",_threshMult); +} + + +ether::ether(I argc,const t_atom *argv): + blsz(0),smprt(0), + _qual(false),_threshMult(0),_invert(false) +{ + /* parse and set object's options given */ + if(argc >= 1) { + if(CanbeBool(argv[0])) + _qual = GetABool(argv[0]); + else + post("%s - Quality must be a boolean value - set to %0i",thisName(),_qual?1:0); + } + + _nmult = _qual?4:2; + + Clear(); + + AddInSignal("Messages and input signal"); + AddInSignal("Reference signal"); + AddOutSignal("Transformed signal"); +} + +ether::~ether() +{ + Delete(); +} + +V ether::Clear() +{ + _input1 = _input2 = NULL; + _buffer1 = _buffer2 = NULL; + _channel1 = _channel2 = NULL; + _output = NULL; + + _bitshuffle = NULL; + _trigland = NULL; + + _Hwin = NULL; + _Wanal = _Wsyn = NULL; + + // ----------------------------- +} + +V ether::Delete() +{ + if(_input1) delete[] _input1; + if(_buffer1) delete[] _buffer1; + if(_channel1) delete[] _channel1; + + if(_input2) delete[] _input2; + if(_buffer2) delete[] _buffer2; + if(_channel2) delete[] _channel2; + + if(_output) delete[] _output; + + if(_bitshuffle) delete[] _bitshuffle; + if(_trigland) delete[] _trigland; + + if(_Wanal) delete[] _Wanal; + if(_Wsyn) delete[] _Wsyn; + if(_Hwin) delete[] _Hwin; + + // ----------------------------- + +} + + +V ether::m_dsp(I n,S *const *in,S *const *out) +{ + const I _D = Blocksize(); + const F _R = Samplerate(); + + if(_D != blsz || _R != smprt) { + blsz = _D; + smprt = _R; + + Delete(); + // --------------------------------------------- + + const int _N = _D*_nmult,_Nw = _N,_Nw2 = _Nw>>1,_N2 = _N>>1; + + _inCount = -_Nw; + + _input1 = new F[_Nw]; + _buffer1 = new F[_N]; + _channel1 = new F[_N+2]; + + _input2 = new F[_Nw]; + _buffer2 = new F[_N]; + _channel2 = new F[_N+2]; + + _output = new F[_Nw]; + + _bitshuffle = new I[_N*2]; + _trigland = new F[_N*2]; + + _Wanal = new F[_Nw]; + _Wsyn = new F[_Nw]; + _Hwin = new F[_Nw]; + + init_rdft( _N, _bitshuffle, _trigland); + + if(_qual) + makewindows( _Hwin, _Wanal, _Wsyn, _Nw, _N, _D, 0); + else + makehanning( _Hwin, _Wanal, _Wsyn, _Nw, _N, _D, 0,0); + } +} + +V ether::m_signal(I n,S *const *in,S *const *out) +{ + /* declare working variables */ + I i, j; + const I _D = blsz,_N = _D*_nmult,_Nw = _N,_N2 = _N/2,_Nw2 = _Nw/2; + + _inCount += _D; + + for ( j = 0 ; j < _N-_D ; j++ ) { + _input1[j] = _input1[j+_D]; + _input2[j] = _input2[j+_D]; + } + for (i = 0; j < _N; j++,i++ ) { + _input1[j] = in[0][i]; + _input2[j] = in[1][i]; + } + + fold( _input1, _Wanal, _Nw, _buffer1, _N, _inCount ); + fold( _input2, _Wanal, _Nw, _buffer2, _N, _inCount ); + + rdft( _N, 1, _buffer1, _bitshuffle, _trigland ); + rdft( _N, 1, _buffer2, _bitshuffle, _trigland ); + + // ---- BEGIN -------------------------------- + + F threshMult = _threshMult; + if (threshMult == 0. ) threshMult = 1; + + for ( i = 0; i <= _N2; i++ ) { + int even = i<<1,odd = even + 1; + + /* convert to polar coordinates from complex values */ + register F a,b; + + a = ( i == _N2 ? _buffer1[1] : _buffer1[even] ); + b = ( i == 0 || i == _N2 ? 0. : _buffer1[odd] ); + + _channel1[even] = hypot( a, b ); + _channel1[odd] = -atan2( b, a ); + + a = ( i == _N2 ? _buffer2[1] : _buffer2[even] ); + b = ( i == 0 || i == _N2 ? 0. : _buffer2[odd] ); + + _channel2[even] = hypot( a, b ); + _channel2[odd] = -atan2( b, a ); + + /* use simple threshold for inverse compositing */ + + if(_invert?(_channel1[even] > _channel2[even]*threshMult):(_channel1[even] < _channel2[even]*threshMult) ) + _channel1[even] = _channel2[even]; + + if (_channel1[odd] == 0. ) _channel1[odd] = _channel2[odd]; + + + /* convert back to complex form, read for the inverse fft */ + _buffer1[even] = _channel1[even] * cos( _channel1[odd] ); + + if (i != _N2 ) + _buffer1[odd] = -_channel1[even] * sin( _channel1[odd] ); + } + + // ---- END -------------------------------- + + rdft( _N, -1, _buffer1, _bitshuffle, _trigland ); + overlapadd( _buffer1, _N, _Wsyn, _output, _Nw, _inCount); + + const F mult = 1./_N; + for ( j = 0; j < _D; j++ ) + out[0][j] = _output[j] * mult; + + for ( j = 0; j < _N-_D; j++ ) + _output[j] = _output[j+_D]; + for (; j < _N; j++ ) + _output[j] = 0.; +} + -- cgit v1.2.1