/* Copyright (C) 2020 Matthias P. Braendli, matthias.braendli@mpb.li http://opendigitalradio.org 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; either version 2 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 for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "ETIDecoder.hpp" #include "buffer_unpack.hpp" #include "crc.h" #include "Log.h" #include #include #include namespace EdiDecoder { using namespace std; ETIDecoder::ETIDecoder(ETIDataCollector& data_collector) : m_data_collector(data_collector), m_dispatcher(std::bind(&ETIDecoder::packet_completed, this)) { using std::placeholders::_1; using std::placeholders::_2; m_dispatcher.register_tag("*ptr", std::bind(&ETIDecoder::decode_starptr, this, _1, _2)); m_dispatcher.register_tag("deti", std::bind(&ETIDecoder::decode_deti, this, _1, _2)); m_dispatcher.register_tag("est", std::bind(&ETIDecoder::decode_estn, this, _1, _2)); m_dispatcher.register_tag("*dmy", std::bind(&ETIDecoder::decode_stardmy, this, _1, _2)); m_dispatcher.register_tagpacket_handler(std::bind(&ETIDecoder::decode_tagpacket, this, _1)); } void ETIDecoder::set_verbose(bool verbose) { m_dispatcher.set_verbose(verbose); } void ETIDecoder::push_bytes(const vector &buf) { m_dispatcher.push_bytes(buf); } void ETIDecoder::push_packet(const vector &buf) { m_dispatcher.push_packet(buf); } void ETIDecoder::setMaxDelay(int num_af_packets) { m_dispatcher.setMaxDelay(num_af_packets); } #define AFPACKET_HEADER_LEN 10 // includes SYNC bool ETIDecoder::decode_starptr(const std::vector& value, const tag_name_t& n) { if (value.size() != 0x40 / 8) { etiLog.log(warn, "Incorrect length %02lx for *PTR", value.size()); return false; } char protocol_sz[5]; protocol_sz[4] = '\0'; copy(value.begin(), value.begin() + 4, protocol_sz); string protocol(protocol_sz); uint16_t major = read_16b(value.begin() + 4); uint16_t minor = read_16b(value.begin() + 6); m_data_collector.update_protocol(protocol, major, minor); return true; } bool ETIDecoder::decode_deti(const std::vector& value, const tag_name_t& n) { /* uint16_t detiHeader = fct | (fcth << 8) | (rfudf << 13) | (ficf << 14) | (atstf << 15); packet.push_back(detiHeader >> 8); packet.push_back(detiHeader & 0xFF); */ uint16_t detiHeader = read_16b(value.begin()); eti_fc_data fc; fc.atstf = (detiHeader >> 15) & 0x1; fc.ficf = (detiHeader >> 14) & 0x1; bool rfudf = (detiHeader >> 13) & 0x1; uint8_t fcth = (detiHeader >> 8) & 0x1F; uint8_t fct = detiHeader & 0xFF; fc.dflc = fcth * 250 + fct; // modulo 5000 counter uint32_t etiHeader = read_32b(value.begin() + 2); uint8_t stat = (etiHeader >> 24) & 0xFF; fc.mid = (etiHeader >> 22) & 0x03; fc.fp = (etiHeader >> 19) & 0x07; uint8_t rfa = (etiHeader >> 17) & 0x3; if (rfa != 0) { etiLog.log(warn, "EDI deti TAG: rfa non-zero"); } bool rfu = (etiHeader >> 16) & 0x1; uint16_t mnsc = rfu ? 0xFFFF : etiHeader & 0xFFFF; const size_t fic_length_words = (fc.ficf ? (fc.mid == 3 ? 32 : 24) : 0); const size_t fic_length = 4 * fic_length_words; const size_t expected_length = 2 + 4 + (fc.atstf ? 1 + 4 + 3 : 0) + fic_length + (rfudf ? 3 : 0); if (value.size() != expected_length) { throw std::logic_error("EDI deti: Assertion error:" "value.size() != expected_length: " + to_string(value.size()) + " " + to_string(expected_length)); } m_data_collector.update_err(stat); m_data_collector.update_mnsc(mnsc); size_t i = 2 + 4; if (fc.atstf) { uint8_t utco = value[i]; i++; uint32_t seconds = read_32b(value.begin() + i); i += 4; m_data_collector.update_edi_time(utco, seconds); m_received_tagpacket.timestamp.utco = utco; m_received_tagpacket.timestamp.seconds = seconds; fc.tsta = read_24b(value.begin() + i); i += 3; } else { // Null timestamp, ETSI ETS 300 799, C.2.2 fc.tsta = 0xFFFFFF; m_received_tagpacket.timestamp.utco = 0; m_received_tagpacket.timestamp.seconds = 0; } m_received_tagpacket.timestamp.tsta = fc.tsta; if (fc.ficf) { vector fic(fic_length); copy( value.begin() + i, value.begin() + i + fic_length, fic.begin()); i += fic_length; m_data_collector.update_fic(move(fic)); } if (rfudf) { uint32_t rfud = read_24b(value.begin() + i); // high 16 bits: RFU in LIDATA EOH // low 8 bits: RFU in TIST (not supported) m_data_collector.update_rfu(rfud >> 8); if ((rfud & 0xFF) != 0xFF) { etiLog.level(warn) << "EDI: RFU in TIST not supported"; } i += 3; } m_data_collector.update_fc_data(fc); return true; } bool ETIDecoder::decode_estn(const std::vector& value, const tag_name_t& name) { uint32_t sstc = read_24b(value.begin()); eti_stc_data stc; const uint8_t n = name[3]; stc.stream_index = n - 1; // n is 1-indexed stc.scid = (sstc >> 18) & 0x3F; stc.sad = (sstc >> 8) & 0x3FF; stc.tpl = (sstc >> 2) & 0x3F; uint8_t rfa = sstc & 0x3; if (rfa != 0) { etiLog.level(warn) << "EDI: rfa field in ESTn tag non-null"; } copy( value.begin() + 3, value.end(), back_inserter(stc.mst)); m_data_collector.add_subchannel(move(stc)); return true; } bool ETIDecoder::decode_stardmy(const std::vector&, const tag_name_t&) { return true; } bool ETIDecoder::decode_tagpacket(const std::vector& value) { m_received_tagpacket.tagpacket = value; return true; } void ETIDecoder::packet_completed() { ReceivedTagPacket tp; swap(tp, m_received_tagpacket); m_data_collector.assemble(move(tp)); } }