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GrAtscFieldSyncMux.h

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00001 /* -*- c++ -*- */
00002 /*
00003  * Copyright 2002 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00020  * Boston, MA 02111-1307, USA.
00021  */
00022 
00023 #ifndef _GRATSCFIELDSYNCMUX_H_
00024 #define _GRATSCFIELDSYNCMUX_H_
00025 
00026 #include <VrHistoryProc.h>
00027 #include <atsc_types.h>
00028 
00033 class GrAtscFieldSyncMux : public VrHistoryProc<atsc_data_segment, atsc_data_segment>
00034 {
00035 
00036 public:
00037 
00038   GrAtscFieldSyncMux ();
00039   ~GrAtscFieldSyncMux ();
00040 
00041   const char *name () { return "GrAtscFieldSyncMux"; }
00042 
00043   int work (VrSampleRange output, void *o[],
00044             VrSampleRange inputs[], void *i[]);
00045 
00046   int forecast (VrSampleRange output, VrSampleRange inputs[]);
00047 
00048   void pre_initialize ();
00049   
00050   static const int      N_SAVED_SYMBOLS = 12;
00051 
00052 protected:
00053   VrSampleIndex         d_current_index;
00054   bool                  d_already_output_field_sync;
00055   unsigned char         d_saved_symbols[N_SAVED_SYMBOLS];
00056 };
00057 
00058 #endif /* _GRATSCFIELDSYNCMUX_H_ */

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