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