beginning of pager decoder

This commit is contained in:
AlexandreRouma
2024-01-31 23:34:40 +01:00
parent 4b6835141e
commit 3fc893568a
9 changed files with 571 additions and 2 deletions

View File

@ -0,0 +1,48 @@
#pragma once
#include <string>
#include <stdint.h>
#include <utils/new_event.h>
#define POCSAG_SYNC_DIST 4
#define POCSAG_BATCH_CODEWORD_COUNT 16
namespace pocsag {
enum CodewordType {
CODEWORD_TYPE_IDLE = -1,
CODEWORD_TYPE_ADDRESS = 0,
CODEWORD_TYPE_MESSAGE = 1
};
enum MessageType {
MESSAGE_TYPE_NUMERIC = 0b00,
MESSAGE_TYPE_ALPHANUMERIC = 0b11
};
using Codeword = uint32_t;
using Address = uint32_t;
class Decoder {
public:
void process(uint8_t* symbols, int count);
NewEvent<Address, MessageType, const std::string&> onMessage;
private:
static int distance(uint32_t a, uint32_t b);
bool correctCodeword(Codeword in, Codeword& out);
void flushMessage();
void decodeBatch();
uint32_t syncSR = 0;
bool synced = false;
int batchOffset = 0;
Codeword batch[POCSAG_BATCH_CODEWORD_COUNT];
Address addr;
MessageType msgType;
std::string msg;
uint32_t lastMsgData;
};
}