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// P25 Decoder (C) Copyright 2013, 2014, 2015, 2016, 2017 Max H. Parke KA1RBI
//
// This file is part of OP25
//
// OP25 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 3, or (at your option)
// any later version.
//
// OP25 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 OP25; see the file COPYING. If not, write to the Free
// Software Foundation, Inc., 51 Franklin Street, Boston, MA
// 02110-1301, USA.
#ifndef INCLUDED_RX_SYNC_H
#define INCLUDED_RX_SYNC_H
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <string>
#include <iostream>
#include <deque>
#include <assert.h>
#include "bit_utils.h"
#include "check_frame_sync.h"
#include "p25p2_vf.h"
#include "mbelib.h"
#include "ambe.h"
#include "ysf_const.h"
#include "dmr_const.h"
#include "p25_frame.h"
#include "op25_imbe_frame.h"
#include "software_imbe_decoder.h"
#include "op25_audio.h"
namespace gr{
namespace op25_repeater{
static const uint64_t DSTAR_FRAME_SYNC_MAGIC = 0x444445101440LL; // expanded into dibits
enum rx_types {
RX_TYPE_NONE=0,
RX_TYPE_P25,
RX_TYPE_DMR,
RX_TYPE_DSTAR,
RX_TYPE_YSF,
RX_N_TYPES
}; // also used as array index
static const struct _mode_data {
const char * type;
int sync_len;
int sync_offset;
int fragment_len; // symbols
int expiration;
uint64_t sync;
} MODE_DATA[RX_N_TYPES] = {
{"NONE", 0,0,0,0,0},
{"P25", 48,0,864,1728, P25_FRAME_SYNC_MAGIC},
{"DMR", 48,66,144,1728, DMR_VOICE_SYNC_MAGIC},
{"DSTAR", 48,72,96,2016*2, DSTAR_FRAME_SYNC_MAGIC},
{"YSF", 40,0,480,480*2, YSF_FRAME_SYNC_MAGIC}
}; // index order must match rx_types enum
enum codeword_types {
CODEWORD_P25P1,
CODEWORD_P25P2,
CODEWORD_DMR,
CODEWORD_DSTAR,
CODEWORD_YSF_FULLRATE,
CODEWORD_YSF_HALFRATE
};
class rx_sync {
public:
void rx_sym(const uint8_t sym);
void sync_reset(void);
rx_sync(const char * options, int debug);
~rx_sync();
private:
void cbuf_insert(const uint8_t c);
void dmr_sync(const uint8_t bitbuf[], int& current_slot, bool& unmute);
void ysf_sync(const uint8_t dibitbuf[], bool& ysf_fullrate, bool& unmute);
void codeword(const uint8_t* cw, const enum codeword_types codeword_type, int slot_id);
void output(int16_t * samp_buf, const ssize_t slot_id);
static const int CBUF_SIZE=864;
static const int NSAMP_OUTPUT = 160;
unsigned int d_symbol_count;
uint64_t d_sync_reg;
uint8_t d_cbuf[CBUF_SIZE*2];
unsigned int d_cbuf_idx;
enum rx_types d_current_type;
int d_threshold;
int d_rx_count;
unsigned int d_expires;
int d_shift_reg;
unsigned int d_unmute_until[2];
p25p2_vf interleaver;
mbe_parms cur_mp[2];
mbe_parms prev_mp[2];
mbe_parms enh_mp[2];
software_imbe_decoder d_software_decoder[2];
std::deque<int16_t> d_output_queue[2];
bool d_stereo;
int d_debug;
op25_audio d_audio;
};
} // end namespace op25_repeater
} // end namespace gr
#endif // INCLUDED_RX_SYNC_H
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