1 files changed, 75 insertions, 0 deletions
diff --git a/src/pareq.h b/src/pareq.h
new file mode 100644
index 0000000..85ea7f9
--- /dev/null
+++ b/src/pareq.h
@@ -0,0 +1,75 @@
+// ----------------------------------------------------------------------
+//
+//  Copyright (C) 2010-2013 Fons Adriaensen <fons@linuxaudio.org>
+//    
+//  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.
+//
+//  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., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// ----------------------------------------------------------------------
+
+
+#ifndef __PAREQ_H
+#define __PAREQ_H
+
+
+#include <stdint.h>
+#include <math.h>
+
+
+class Pareq
+{
+public:
+
+    Pareq (void);
+    ~Pareq (void);
+    
+    void setfsamp (float fsamp);
+    void setparam (float f, float g)
+    {
+	_f0 = f;
+	_g0 = powf (10.0f, 0.05f * g);
+	_touch0++;
+    }
+    void reset (void);
+    void prepare (int nsamp);
+    void process (int nsamp, int nchan, float *data[])
+    {
+	if (_state != BYPASS) process1 (nsamp, nchan, data);
+    }
+
+private:
+
+    enum { BYPASS, STATIC, SMOOTH, MAXCH = 4 };
+
+    void calcpar1 (int nsamp, float g, float f);
+    void process1 (int nsamp, int nchan, float *data[]);
+
+    volatile int16_t  _touch0;
+    volatile int16_t  _touch1;
+    bool              _bypass;
+    int               _state;
+    float             _fsamp;
+
+    float             _g0, _g1;
+    float             _f0, _f1;
+    float             _c1, _dc1;
+    float             _c2, _dc2;
+    float             _gg, _dgg;
+
+    float             _z1 [MAXCH];
+    float             _z2 [MAXCH];
+};
+
+
+#endif