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osctrl.h

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+/*	osctrl.h
+
+This file is part of a program that implements a Software-Defined Radio.
+
+Copyright (C) 2014 Warren Pratt, NR0V
+
+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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+The author can be reached by email at
+
+warren@wpratt.com
+
+*/
+
+// This file is part of the implementation of the Overshoot Controller from
+// "Controlled Envelope Single Sideband" by David L. Hershberger, W9GR, in
+// the November/December 2014 issue of QEX.
+
+#ifndef _osctrl_h
+#define _osctrl_h
+
+typedef struct _osctrl
+{
+	int run;						// 1 to run; 0 otherwise
+	int size;						// buffer size
+	double *inbuff;					// input buffer
+	double *outbuff;				// output buffer
+	int rate;						// sample rate
+	double osgain;					// gain applied to overshoot "clippings"
+	double bw;						// bandwidth
+	int pn;							// "peak stretcher" window, samples
+	int dl_len;						// delay line length, samples
+	double* dl;						// delay line for complex samples
+	double* dlenv;					// delay line for envelope values
+	int in_idx;						// input index for dl
+	int out_idx;					// output index for dl
+	double max_env;					// maximum env value in env delay line
+	double env_out;
+} osctrl, *OSCTRL;
+
+extern void xosctrl (OSCTRL a);
+
+extern OSCTRL create_osctrl (
+				int run,
+				int size,
+				double* inbuff,
+				double* outbuff,
+				int rate,
+				double osgain );
+
+extern void destroy_osctrl (OSCTRL a);
+
+extern void flush_osctrl (OSCTRL a);
+
+extern void setBuffers_osctrl (OSCTRL a, double* in, double* out);
+
+extern void setSamplerate_osctrl (OSCTRL a, int rate);
+
+extern void setSize_osctrl (OSCTRL a, int size);
+
+#endif