Import CPR changes from experimental branch.

cpr.h

@@ -0,0 +1,39 @@
+// Part of dump1090, a Mode S message decoder for RTLSDR devices.
+//
+// cpr.h - Compact Position Reporting prototypes
+//
+// Copyright (c) 2014,2015 Oliver Jowett <oliver@mutability.co.uk>
+//
+// This file is free software: you may copy, redistribute 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 file 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, see <http://www.gnu.org/licenses/>.
+
+#ifndef DUMP1090_CPR_H
+#define DUMP1090_CPR_H
+
+int decodeCPRairborne(int even_cprlat, int even_cprlon,
+                      int odd_cprlat, int odd_cprlon,
+                      int fflag,
+                      double *out_lat, double *out_lon);
+
+int decodeCPRsurface(double reflat, double reflon,
+                     int even_cprlat, int even_cprlon,
+                     int odd_cprlat, int odd_cprlon,
+                     int fflag,
+                     double *out_lat, double *out_lon);
+
+int decodeCPRrelative(double reflat, double reflon,
+                      int cprlat, int cprlon,
+                      int fflag, int surface,
+                      double *out_lat, double *out_lon);
+
+#endif