""

svn path=/trunk/; revision=328

1 files changed, 251 insertions, 0 deletions

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 <stdlib.h>
+
+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.;
+}
+