mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-24 19:00:36 -05:00
65 lines
2.6 KiB
C++
65 lines
2.6 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
|
|
// Copyright (C) 2015 F4EXB //
|
|
// written by Edouard Griffiths //
|
|
// //
|
|
// 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 as version 3 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 V3 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 PLUGINS_CHANNEL_BFM_RDSDECODER_H_
|
|
#define PLUGINS_CHANNEL_BFM_RDSDECODER_H_
|
|
|
|
class RDSDecoder
|
|
{
|
|
public:
|
|
RDSDecoder();
|
|
~RDSDecoder();
|
|
|
|
bool frameSync(bool bit);
|
|
unsigned int *getGroup() { return m_group; }
|
|
bool synced() const { return m_sync == SYNC; }
|
|
|
|
float m_qua;
|
|
|
|
protected:
|
|
unsigned int calc_syndrome(unsigned long message, unsigned char mlen);
|
|
void enter_sync(unsigned int sync_block_number);
|
|
void enter_no_sync();
|
|
|
|
private:
|
|
unsigned long m_reg;
|
|
enum { NO_SYNC, SYNC } m_sync;
|
|
bool m_presync;
|
|
unsigned long m_lastseenOffsetCounter;
|
|
unsigned long m_bitCounter;
|
|
unsigned char m_lastseenOffset;
|
|
unsigned int m_blockBitCounter;
|
|
unsigned int m_wrongBlocksCounter;
|
|
unsigned int m_blocksCounter;
|
|
unsigned int m_groupGoodBlocksCounter;
|
|
unsigned char m_blockNumber;
|
|
bool m_groupAssemblyStarted;
|
|
bool m_goodBlock;
|
|
unsigned int m_group[4];
|
|
|
|
/* see page 59, Annex C, table C.1 in the standard
|
|
* offset word C' has been put at the end */
|
|
static const unsigned int offset_pos[5];
|
|
static const unsigned int offset_word[5];
|
|
static const unsigned int syndrome[5];
|
|
};
|
|
|
|
|
|
|
|
#endif /* PLUGINS_CHANNEL_BFM_RDSDECODER_H_ */
|