/* Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011 Her Majesty the Queen in Right of Canada (Communications Research Center Canada) Copyright (C) 2017 Matthias P. Braendli, matthias.braendli@mpb.li http://opendigitalradio.org */ /* This file is part of ODR-DabMod. ODR-DabMod 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 of the License, or (at your option) any later version. ODR-DabMod 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 ODR-DabMod. If not, see . */ #include "TII.h" #include "PcDebug.h" #include #include #include typedef std::complex complexf; /* TII pattern for TM I, II, IV */ const int pattern_tm1_2_4[][8] = { // {{{ {0,0,0,0,1,1,1,1}, {0,0,0,1,0,1,1,1}, {0,0,0,1,1,0,1,1}, {0,0,0,1,1,1,0,1}, {0,0,0,1,1,1,1,0}, {0,0,1,0,0,1,1,1}, {0,0,1,0,1,0,1,1}, {0,0,1,0,1,1,0,1}, {0,0,1,0,1,1,1,0}, {0,0,1,1,0,0,1,1}, {0,0,1,1,0,1,0,1}, {0,0,1,1,0,1,1,0}, {0,0,1,1,1,0,0,1}, {0,0,1,1,1,0,1,0}, {0,0,1,1,1,1,0,0}, {0,1,0,0,0,1,1,1}, {0,1,0,0,1,0,1,1}, {0,1,0,0,1,1,0,1}, {0,1,0,0,1,1,1,0}, {0,1,0,1,0,0,1,1}, {0,1,0,1,0,1,0,1}, {0,1,0,1,0,1,1,0}, {0,1,0,1,1,0,0,1}, {0,1,0,1,1,0,1,0}, {0,1,0,1,1,1,0,0}, {0,1,1,0,0,0,1,1}, {0,1,1,0,0,1,0,1}, {0,1,1,0,0,1,1,0}, {0,1,1,0,1,0,0,1}, {0,1,1,0,1,0,1,0}, {0,1,1,0,1,1,0,0}, {0,1,1,1,0,0,0,1}, {0,1,1,1,0,0,1,0}, {0,1,1,1,0,1,0,0}, {0,1,1,1,1,0,0,0}, {1,0,0,0,0,1,1,1}, {1,0,0,0,1,0,1,1}, {1,0,0,0,1,1,0,1}, {1,0,0,0,1,1,1,0}, {1,0,0,1,0,0,1,1}, {1,0,0,1,0,1,0,1}, {1,0,0,1,0,1,1,0}, {1,0,0,1,1,0,0,1}, {1,0,0,1,1,0,1,0}, {1,0,0,1,1,1,0,0}, {1,0,1,0,0,0,1,1}, {1,0,1,0,0,1,0,1}, {1,0,1,0,0,1,1,0}, {1,0,1,0,1,0,0,1}, {1,0,1,0,1,0,1,0}, {1,0,1,0,1,1,0,0}, {1,0,1,1,0,0,0,1}, {1,0,1,1,0,0,1,0}, {1,0,1,1,0,1,0,0}, {1,0,1,1,1,0,0,0}, {1,1,0,0,0,0,1,1}, {1,1,0,0,0,1,0,1}, {1,1,0,0,0,1,1,0}, {1,1,0,0,1,0,0,1}, {1,1,0,0,1,0,1,0}, {1,1,0,0,1,1,0,0}, {1,1,0,1,0,0,0,1}, {1,1,0,1,0,0,1,0}, {1,1,0,1,0,1,0,0}, {1,1,0,1,1,0,0,0}, {1,1,1,0,0,0,0,1}, {1,1,1,0,0,0,1,0}, {1,1,1,0,0,1,0,0}, {1,1,1,0,1,0,0,0}, {1,1,1,1,0,0,0,0} }; // }}} TII::TII(unsigned int dabmode, const tii_config_t& tii_config, unsigned phase) : ModCodec(), RemoteControllable("tii"), m_dabmode(dabmode), m_conf(tii_config) { PDEBUG("TII::TII(%u) @ %p\n", dabmode, this); RC_ADD_PARAMETER(enable, "enable TII [0-1]"); RC_ADD_PARAMETER(comb, "TII comb number [0-23]"); RC_ADD_PARAMETER(pattern, "TII pattern number [0-69]"); RC_ADD_PARAMETER(old_variant, "select old TII variant for old (buggy) receivers [0-1]"); switch (m_dabmode) { case 1: m_carriers = 1536; m_insert = (phase & 0x40) ? false : true; if (not(0 <= m_conf.pattern and m_conf.pattern <= 69) ) { throw TIIError("TII::TII pattern not valid!"); } break; case 2: m_carriers = 384; m_insert = (phase & 0x01) ? false : true; if (not(0 <= m_conf.pattern and m_conf.pattern <= 69) ) { throw TIIError("TII::TII pattern not valid!"); } break; /* unsupported case 3: m_carriers = 192; break; case 4: d_dabmode = 0; case 0: */ default: std::stringstream ss_exception; ss_exception << "TII::TII DAB mode " << m_dabmode << " not valid!"; throw TIIError(ss_exception.str()); } if (not(0 <= m_conf.comb and m_conf.comb <= 23) ) { throw TIIError("TII::TII comb not valid!"); } m_enabled_carriers.clear(); m_enabled_carriers.resize(m_carriers); prepare_pattern(); } TII::~TII() { PDEBUG("TII::~TII() @ %p\n", this); } const char* TII::name() { // Calculate name on demand because comb and pattern are // modifiable through RC std::stringstream ss; ss << "TII(comb:" << m_conf.comb << ", pattern:" << m_conf.pattern << ", variant:" << (m_conf.old_variant ? "old" : "new") << ")"; m_name = ss.str(); return m_name.c_str(); } int TII::process(Buffer* dataIn, Buffer* dataOut) { PDEBUG("TII::process(dataOut: %p)\n", dataOut); if ( (dataIn == NULL) or (dataIn->getLength() != m_carriers * sizeof(complexf))) { throw TIIError("TII::process input size not valid!"); } dataOut->setLength(m_carriers * sizeof(complexf)); bzero(dataOut->getData(), dataOut->getLength()); if (m_conf.enable and m_insert) { boost::mutex::scoped_lock lock(m_enabled_carriers_mutex); complexf* in = reinterpret_cast(dataIn->getData()); complexf* out = reinterpret_cast(dataOut->getData()); if ((m_enabled_carriers.size() % 2) != 0) { throw std::logic_error("odd number of enabled carriers"); } /* Normalise the TII carrier power according to ETSI TR 101 496-3 * Clause 5.4.2.2 Paragraph 7: * * > The ratio of carriers in a TII symbol to a normal DAB symbol * > is 1:48 for all Modes, so that the signal power in a TII symbol is * > 16 dB below the signal power of the other symbols. * * We need to normalise to the square root of 48 because we touch I and * Q separately. */ const float normalise_factor = 0.14433756729740644112f; // = 1/sqrt(48) for (size_t i = 0; i < m_enabled_carriers.size(); i+=2) { // See header file for an explanation of the old variant if (m_enabled_carriers[i]) { out[i] = normalise_factor * (m_conf.old_variant ? in[i+1] : in[i]); } if (m_enabled_carriers[i+1]) { out[i+1] = normalise_factor * in[i+1]; } } } // Align with frames containing the right data (when FC.fp is first quarter) m_insert = not m_insert; return 1; } void TII::enable_carrier(int k) { int ix = m_carriers/2 + k; if (ix < 0 or ix+1 >= (ssize_t)m_enabled_carriers.size()) { throw TIIError("TII::enable_carrier invalid k!"); } m_enabled_carriers[ix] = true; // NULL frequency is never enabled. if (ix > 1 and (ix-1 != 768)) { m_enabled_carriers[ix-1] = true; } } void TII::prepare_pattern() { int comb = m_conf.comb; // Convert from unsigned to signed boost::mutex::scoped_lock lock(m_enabled_carriers_mutex); // Clear previous pattern for (size_t i = 0; i < m_enabled_carriers.size(); i++) { m_enabled_carriers[i] = false; } // This could be written more efficiently, but since it is // not performance-critial, it makes sense to write it // in the same way as the specification in // ETSI EN 300 401 Clause 14.8 if (m_dabmode == 1) { for (int k = -768; k < -384; k++) { for (int b = 0; b < 8; b++) { if ( k == -768 + 2 * comb + 48 * b and pattern_tm1_2_4[m_conf.pattern][b]) { enable_carrier(k); } } } for (int k = -384; k < -0; k++) { for (int b = 0; b < 8; b++) { if ( k == -384 + 2 * comb + 48 * b and pattern_tm1_2_4[m_conf.pattern][b]) { enable_carrier(k); } } } for (int k = 1; k <= 384; k++) { for (int b = 0; b < 8; b++) { if ( k == 1 + 2 * comb + 48 * b and pattern_tm1_2_4[m_conf.pattern][b]) { enable_carrier(k); } } } for (int k = 384; k <= 768; k++) { for (int b = 0; b < 8; b++) { if ( k == 385 + 2 * comb + 48 * b and pattern_tm1_2_4[m_conf.pattern][b]) { enable_carrier(k); } } } } else if (m_dabmode == 2) { for (int k = -192; k <= 192; k++) { for (int b = 0; b < 4; b++) { if ( k == -192 + 2 * comb + 48 * b and pattern_tm1_2_4[m_conf.pattern][b]) { enable_carrier(k); } } for (int b = 4; b < 8; b++) { if ( k == -191 + 2 * comb + 48 * b and pattern_tm1_2_4[m_conf.pattern][b]) { enable_carrier(k); } } } } else { throw TIIError("TII::TII DAB mode not valid!"); } } void TII::set_parameter(const std::string& parameter, const std::string& value) { using namespace std; stringstream ss(value); ss.exceptions ( stringstream::failbit | stringstream::badbit ); if (parameter == "enable") { ss >> m_conf.enable; } else if (parameter == "pattern") { int new_pattern; ss >> new_pattern; if ( (m_dabmode == 1 or m_dabmode == 2) and not(0 <= new_pattern and new_pattern <= 69) ) { throw TIIError("TII pattern not valid!"); } m_conf.pattern = new_pattern; prepare_pattern(); } else if (parameter == "comb") { int new_comb; ss >> new_comb; if (not(0 <= new_comb and new_comb <= 23) ) { throw TIIError("TII comb not valid!"); } m_conf.comb = new_comb; prepare_pattern(); } else if (parameter == "old_variant") { ss >> m_conf.old_variant; } else { stringstream ss; ss << "Parameter '" << parameter << "' is not exported by controllable " << get_rc_name(); throw ParameterError(ss.str()); } } const std::string TII::get_parameter(const std::string& parameter) const { using namespace std; stringstream ss; if (parameter == "enable") { ss << (m_conf.enable ? 1 : 0); } else if (parameter == "pattern") { ss << m_conf.pattern; } else if (parameter == "comb") { ss << m_conf.comb; } else if (parameter == "old_variant") { ss << (m_conf.old_variant ? 1 : 0); } else { ss << "Parameter '" << parameter << "' is not exported by controllable " << get_rc_name(); throw ParameterError(ss.str()); } return ss.str(); }