""

svn path=/trunk/; revision=328

1 files changed, 227 insertions, 0 deletions

diff --git a/externals/grill/fftease/src/drown~.cpp b/externals/grill/fftease/src/drown~.cpp
new file mode 100644
index 00000000..0e4ee4a8
--- /dev/null
+++ b/externals/grill/fftease/src/drown~.cpp
@@ -0,0 +1,227 @@
+/*
+
+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 drown:
+	public flext_dsp
+{
+	FLEXT_HEADER_S(drown,flext_dsp,setup)
+	
+public:
+	drown(I argc,const t_atom *argv);
+	~drown();
+
+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;
+
+	// -----------------------------
+
+private:
+	V Clear();
+	V Delete();
+
+	static V setup(t_classid c);
+};
+
+FLEXT_LIB_DSP_V("fftease, drown~",drown)
+
+
+V drown::setup(t_classid c)
+{
+}
+
+
+drown::drown(I argc,const t_atom *argv):
+	blsz(0),smprt(0),_nmult(4)
+{
+	Clear();
+
+	AddInSignal("Messages and input signal");
+	AddInSignal("Threshold generator signal");
+	AddInSignal("Multiplier signal for weak bins");
+	AddOutSignal("Transformed signal");
+}
+
+drown::~drown()
+{
+	Delete();
+}
+
+V drown::Clear()
+{
+	_input1 = _input2 = NULL;
+	_buffer1 = _buffer2 = NULL;
+	_channel1 = _channel2 = NULL;
+	_output = NULL;
+/*
+	_bitshuffle = NULL;
+	_trigland = NULL;
+*/
+	_Hwin = NULL;
+	_Wanal = _Wsyn = NULL;
+
+	// -----------------------------
+
+}
+
+V drown::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 drown::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];
+		init_rdft( _N, _bitshuffle, _trigland);
+		*/
+
+		_Wanal = new F[_Nw];	
+		_Wsyn = new F[_Nw];	
+		_Hwin = new F[_Nw];
+		makewindows( _Hwin, _Wanal, _Wsyn, _Nw, _N, _D, 0);
+	}
+}
+
+
+/* helper function */
+static void nudist( float *_S, float *_C, float threshold, float fmult, int N2 )
+{
+  int real, imag, amp, phase;
+  int i;
+  float maxamp = 1.;
+  for ( i = 0; i <= N2; i++ ) {
+    imag = phase = ( real = amp = i<<1 ) + 1;
+    F a = ( i == N2 ? _S[1] : _S[real] );
+    F b = ( i == 0 || i == N2 ? 0. : _S[imag] );
+
+    _C[amp] = hypot( a, b );
+    if( _C[amp] < threshold) _C[amp] *= fmult;
+
+    _C[phase] = -atan2( b, a );
+  }
+
+  for ( i = 0; i <= N2; i++ ) {
+    imag = phase = ( real = amp = i<<1 ) + 1;
+    _S[real] = _C[amp] * cos( _C[phase] );
+    if ( i != N2 )
+      _S[imag] = -_C[amp] * sin( _C[phase] );
+  }
+}
+
+
+V drown::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];
+	for (i = 0; j < _N; j++,i++ )
+		_input1[j] = in[0][i];
+
+	fold( _input1, _Wanal, _Nw, _buffer1, _N, _inCount );		
+
+//	rdft( _N, 1, _buffer1, _bitshuffle, _trigland );
+	rfft( _buffer1, _N2, 1);
+
+	// ---- BEGIN --------------------------------
+
+	{
+		// only first value of the signal vectors
+		const F thresh = in[1][0],mult = in[2][0];
+
+		nudist( _buffer1, _channel1, thresh, mult, _N2 );
+	}
+
+	// ---- END --------------------------------
+
+	rfft( _buffer1, _N2, 0);
+//	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.;
+}
+
+