140 lines
5.0 KiB
C++
140 lines
5.0 KiB
C++
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/*
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* Copyright (C) 2015 Jared Boone, ShareBrained Technology, Inc.
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* Copyright (C) 2016 Furrtek
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __PROC_RDS_H__
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#define __PROC_RDS_H__
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#include "baseband_processor.hpp"
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#include "baseband_thread.hpp"
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#define SAMPLES_PER_BIT 192
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#define FILTER_SIZE 576
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#define SAMPLE_BUFFER_SIZE SAMPLES_PER_BIT + FILTER_SIZE
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class RDSProcessor : public BasebandProcessor {
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public:
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void execute(const buffer_c8_t& buffer) override;
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void on_message(const Message* const msg) override;
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private:
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uint32_t * rdsdata { };
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BasebandThread baseband_thread { 2280000, this, NORMALPRIO + 20, baseband::Direction::Transmit };
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uint16_t message_length { 0 };
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int8_t re { 0 }, im { 0 };
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uint8_t mphase { 0 }, s { 0 };
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uint32_t bit_pos { 0 };
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int32_t sample_buffer[SAMPLE_BUFFER_SIZE] = {0};
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int32_t val { 0 };
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uint8_t prev_output { 0 };
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uint8_t cur_output { 0 };
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uint8_t cur_bit { 0 };
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int sample_count = SAMPLES_PER_BIT;
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int in_sample_index = 0;
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int32_t sample { 0 };
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int out_sample_index = SAMPLE_BUFFER_SIZE - 1;
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uint32_t phase { 0 }, sphase { 0 };
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int32_t delta { 0 };
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bool configured { false };
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const int32_t waveform_biphase[576] = {
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165,167,168,168,167,166,163,160,
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157,152,147,141,134,126,118,109,
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99,88,77,66,53,41,27,14,
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0,-14,-29,-44,-59,-74,-89,-105,
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-120,-135,-150,-165,-179,-193,-206,-218,
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-231,-242,-252,-262,-271,-279,-286,-291,
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-296,-299,-301,-302,-302,-300,-297,-292,
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-286,-278,-269,-259,-247,-233,-219,-202,
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-185,-166,-145,-124,-101,-77,-52,-26,
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0,27,56,85,114,144,175,205,
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236,266,296,326,356,384,412,439,
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465,490,513,535,555,574,590,604,
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616,626,633,637,639,638,633,626,
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616,602,586,565,542,515,485,451,
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414,373,329,282,232,178,121,62,
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0,-65,-132,-202,-274,-347,-423,-500,
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-578,-656,-736,-815,-894,-973,-1051,-1128,
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-1203,-1276,-1347,-1415,-1479,-1540,-1596,-1648,
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-1695,-1736,-1771,-1799,-1820,-1833,-1838,-1835,
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-1822,-1800,-1767,-1724,-1670,-1605,-1527,-1437,
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-1334,-1217,-1087,-943,-785,-611,-423,-219,
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0,235,487,755,1040,1341,1659,1994,
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2346,2715,3101,3504,3923,4359,4811,5280,
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5764,6264,6780,7310,7856,8415,8987,9573,
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10172,10782,11404,12036,12678,13329,13989,14656,
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15330,16009,16694,17382,18074,18767,19461,20155,
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20848,21539,22226,22909,23586,24256,24918,25571,
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26214,26845,27464,28068,28658,29231,29787,30325,
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30842,31339,31814,32266,32694,33097,33473,33823,
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34144,34437,34699,34931,35131,35299,35434,35535,
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35602,35634,35630,35591,35515,35402,35252,35065,
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34841,34579,34279,33941,33566,33153,32702,32214,
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31689,31128,30530,29897,29228,28525,27788,27017,
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26214,25379,24513,23617,22693,21740,20761,19755,
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18725,17672,16597,15501,14385,13251,12101,10935,
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9755,8563,7360,6148,4927,3701,2470,1235,
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0,-1235,-2470,-3701,-4927,-6148,-7360,-8563,
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-9755,-10935,-12101,-13251,-14385,-15501,-16597,-17672,
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-18725,-19755,-20761,-21740,-22693,-23617,-24513,-25379,
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-26214,-27017,-27788,-28525,-29228,-29897,-30530,-31128,
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-31689,-32214,-32702,-33153,-33566,-33941,-34279,-34579,
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-34841,-35065,-35252,-35402,-35515,-35591,-35630,-35634,
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-35602,-35535,-35434,-35299,-35131,-34931,-34699,-34437,
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-34144,-33823,-33473,-33097,-32694,-32266,-31814,-31339,
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-30842,-30325,-29787,-29231,-28658,-28068,-27464,-26845,
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-26214,-25571,-24918,-24256,-23586,-22909,-22226,-21539,
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-20848,-20155,-19461,-18767,-18074,-17382,-16694,-16009,
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-15330,-14656,-13989,-13329,-12678,-12036,-11404,-10782,
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-10172,-9573,-8987,-8415,-7856,-7310,-6780,-6264,
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-5764,-5280,-4811,-4359,-3923,-3504,-3101,-2715,
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-2346,-1994,-1659,-1341,-1040,-755,-487,-235,
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0,219,423,611,785,943,1087,1217,
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1334,1437,1527,1605,1670,1724,1767,1800,
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1822,1835,1838,1833,1820,1799,1771,1736,
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1695,1648,1596,1540,1479,1415,1347,1276,
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1203,1128,1051,973,894,815,736,656,
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578,500,423,347,274,202,132,65,
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0,-62,-121,-178,-232,-282,-329,-373,
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-414,-451,-485,-515,-542,-565,-586,-602,
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-616,-626,-633,-638,-639,-637,-633,-626,
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-616,-604,-590,-574,-555,-535,-513,-490,
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-465,-439,-412,-384,-356,-326,-296,-266,
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-236,-205,-175,-144,-114,-85,-56,-27,
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0,26,52,77,101,124,145,166,
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185,202,219,233,247,259,269,278,
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286,292,297,300,302,302,301,299,
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296,291,286,279,271,262,252,242,
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231,218,206,193,179,165,150,135,
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120,105,89,74,59,44,29,14,
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0,-14,-27,-41,-53,-66,-77,-88,
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-99,-109,-118,-126,-134,-141,-147,-152,
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-157,-160,-163,-166,-167,-168,-168,-167
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};
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};
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#endif
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