mirror of
https://github.com/JvanKatwijk/dab-cmdline
synced 2025-10-06 08:02:52 +02:00
407 lines
11 KiB
C++
407 lines
11 KiB
C++
#
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/*
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* Copyright (C) 2015, 2016
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* Jan van Katwijk (J.vanKatwijk@gmail.com)
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* Lazy Chair Computing
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*
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* This file is part of the DAB-library
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*
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* DAB-library 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 of the License, or
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* (at your option) any later version.
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*
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* DAB-library 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 DAB-library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* E X A M P L E P R O G R A M
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* for the DAB-library
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*/
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#include <unistd.h>
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#include <signal.h>
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#include <getopt.h>
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#include <cstdio>
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#include <iostream>
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#include <vector>
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#include "audiosink.h"
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#include "dab-api.h"
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#include "band-handler.h"
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#ifdef HAVE_SDRPLAY
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#include "sdrplay-handler.h"
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#elif HAVE_AIRSPY
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#include "airspy-handler.h"
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#elif HAVE_RTLSDR
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#include "rtlsdr-handler.h"
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#endif
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#include <atomic>
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using std::cerr;
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using std::endl;
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// we deal with some callbacks, so we have some data that needs
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// to be accessed from global contexts
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static
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std::atomic<bool> run;
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static
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void *theRadio = NULL;
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static
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std::atomic<bool>timeSynced;
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static
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std::atomic<bool>timesyncSet;
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static
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std::atomic<bool>ensembleRecognized;
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static
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audioSink *soundOut = NULL;
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std::string programName = "Classic FM";
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int32_t serviceId = -1;
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static void sighandler (int signum) {
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fprintf (stderr, "Signal caught, terminating!\n");
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run. store (false);
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}
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static
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void syncsignalHandler (bool b, void *userData) {
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timeSynced. store (b);
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timesyncSet. store (true);
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(void)userData;
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}
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//
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// This function is called whenever the dab engine has taken
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// some time to gather information from the FIC bloks
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// the Boolean b tells whether or not an ensemble has been
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// recognized, the names of the programs are in the
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// ensemble
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static
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void ensemblename_Handler (const char *name, int Id, void *userData) {
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fprintf (stderr, "ensemble %s is (%X) recognized\n",
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name, (uint32_t)Id);
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ensembleRecognized. store (true);
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}
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std::vector<std::string> programNames;
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std::vector<int> programSIds;
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static
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void programname_Handler (const char *s, int SId, void *userdata) {
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int16_t i;
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for (std::vector<std::string>::iterator it = programNames.begin();
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it != programNames. end(); ++it)
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if (*it == std::string (s))
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return;
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programNames. push_back (s);
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programSIds . push_back (SId);
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fprintf (stderr, "program %s is part of the ensemble\n", s);
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}
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static
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void programdata_Handler (audiodata *d, void *ctx) {
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(void)ctx;
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fprintf (stderr, "\tstartaddress\t= %d\n", d -> startAddr);
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fprintf (stderr, "\tlength\t\t= %d\n", d -> length);
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fprintf (stderr, "\tsubChId\t\t= %d\n", d -> subchId);
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fprintf (stderr, "\tprotection\t= %d\n", d -> protLevel);
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fprintf (stderr, "\tbitrate\t\t= %d\n", d -> bitRate);
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}
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//
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// The function is called from within the library with
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// a string, the so-called dynamic label
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static
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void dataOut_Handler (const char *dynamicLabel, void *ctx) {
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(void)ctx;
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// fprintf (stderr, "%s\n", dynamicLabel);
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}
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static
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void bytesOut_Handler (uint8_t *data, int16_t amount, uint8_t k, void *ctx) {
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(void)data;
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(void)amount;
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(void)ctx;
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}
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//
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// The function is called from within the library with
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// a buffer full of PCM samples. We pass them on to the
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// audiohandler, based on portaudio.
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static
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void pcmHandler (int16_t *buffer, int size, int rate,
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bool isStereo, void *ctx) {
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static bool isStarted = false;
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(void)isStereo;
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if (!isStarted) {
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soundOut -> restart ();
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isStarted = true;
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}
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soundOut -> audioOut (buffer, size, rate);
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}
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static
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void systemData (bool flag, int16_t snr, int32_t freqOff, void *ctx) {
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// fprintf (stderr, "synced = %s, snr = %d, offset = %d\n",
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// flag? "on":"off", snr, freqOff);
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}
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static
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void fibQuality (int16_t q, void *ctx) {
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// fprintf (stderr, "fic quality = %d\n", q);
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}
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static
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void mscQuality (int16_t fe, int16_t rsE, int16_t aacE, void *ctx) {
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// fprintf (stderr, "msc quality = %d %d %d\n", fe, rsE, aacE);
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}
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int main (int argc, char **argv) {
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// Default values
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uint8_t theMode = 1;
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std::string theChannel = "11C";
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uint8_t theBand = BAND_III;
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int16_t ppmCorrection = 0;
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#ifndef HAVE_SDRPLAY
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int theGain = 35; // scale = 0 .. 100
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#else
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int16_t theGain = 30;
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int16_t lnaState = 2;
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#endif
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std::string soundChannel = "default";
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int16_t latency = 10;
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bool autogain = false;
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int opt;
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struct sigaction sigact;
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bandHandler dabBand;
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deviceHandler *theDevice;
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fprintf (stderr, "dab_cmdline, \
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Copyright 2017 J van Katwijk, Lazy Chair Computing\n");
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timeSynced. store (false);
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timesyncSet. store (false);
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run. store (false);
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while ((opt = getopt (argc, argv, "M:B:C:P:G:A:L:S:Q")) != -1) {
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switch (opt) {
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case 'M':
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theMode = atoi (optarg);
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if (!((theMode == 1) || (theMode == 2) || (theMode == 4)))
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theMode = 1;
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break;
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case 'B':
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theBand = std::string (optarg) == std::string ("L_BAND") ?
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L_BAND : BAND_III;
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break;
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case 'C':
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theChannel = std::string (optarg);
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break;
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case 'P':
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programName = optarg;
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break;
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case 'p':
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ppmCorrection = atoi (optarg);
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break;
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#ifdef HAVE_SDRPLAY
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case 'G':
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theGain = atoi (optarg);
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break;
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case 'L':
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lnaState = atoi (optarg);
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break;
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#else
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case 'G':
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theGain = atoi (optarg);
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break;
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case 'L':
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latency = atoi (optarg);
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break;
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#endif
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case 'Q':
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autogain = true;
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break;
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case 'A':
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soundChannel = optarg;
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break;
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case 'S': {
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std::stringstream ss;
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ss << std::hex << optarg;
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ss >> serviceId;
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break;
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}
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default:
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break;
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}
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}
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//
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sigact.sa_handler = sighandler;
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sigemptyset(&sigact.sa_mask);
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sigact.sa_flags = 0;
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// sigaction(SIGINT, &sigact, NULL);
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// sigaction(SIGTERM, &sigact, NULL);
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// sigaction(SIGQUIT, &sigact, NULL);
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bool err;
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int32_t frequency = dabBand. Frequency (theBand, theChannel);
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try {
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#ifdef HAVE_SDRPLAY
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theDevice = new sdrplayHandler (frequency,
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ppmCorrection,
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theGain,
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lnaState,
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autogain,
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0,
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0);
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#elif HAVE_AIRSPY
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theDevice = new airspyHandler (frequency,
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ppmCorrection,
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theGain, false);
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#elif HAVE_RTLSDR
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theDevice = new rtlsdrHandler (frequency,
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ppmCorrection,
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theGain,
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autogain,
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0);
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#endif
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}
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catch (std::exception& ex) {
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printf("Exception : %s\n", ex.what ());
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fprintf (stderr, "allocating device failed, fatal\n");
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exit (32);
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}
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//
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// We have a device
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soundOut = new audioSink (latency, soundChannel, &err);
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if (err) {
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fprintf (stderr, "no valid sound channel, fatal\n");
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exit (33);
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}
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// and with a sound device we now can create a "backend"
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API_struct interface;
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interface. dabMode = theMode;
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interface. thresholdValue = 10;
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interface. syncsignal_Handler = syncsignalHandler;
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interface. systemdata_Handler = systemData;
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interface. ensemblename_Handler = ensemblename_Handler;
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interface. programname_Handler = programname_Handler;
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interface. fib_quality_Handler = fibQuality;
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interface. audioOut_Handler = pcmHandler;
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interface. dataOut_Handler = dataOut_Handler;
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interface. bytesOut_Handler = bytesOut_Handler;
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interface. programdata_Handler = programdata_Handler;
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interface. program_quality_Handler = mscQuality;
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interface. motdata_Handler = nullptr;
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interface. tii_data_Handler = nullptr;
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interface. timeHandler = nullptr;
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// and with a sound device we now can create a "backend"
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theRadio = dabInit (theDevice,
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&interface,
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nullptr, // no spectrum shown
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nullptr, // no constellations
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nullptr // Ctx
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);
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if (theRadio == NULL) {
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fprintf (stderr, "sorry, no radio available, fatal\n");
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exit (4);
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}
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theDevice -> setGain (theGain);
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if (autogain)
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theDevice -> set_autogain (autogain);
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theDevice -> restartReader (frequency);
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//
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// The device should be working right now
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timesyncSet. store (false);
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ensembleRecognized. store (false);
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dabStartProcessing (theRadio);
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int timeOut = 0;
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while (!timesyncSet. load () && (++timeOut < 5))
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sleep (1);
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if (!timeSynced. load ()) {
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cerr << "There does not seem to be a DAB signal here" << endl;
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theDevice -> stopReader ();
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sleep (1);
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dabExit (theRadio);
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delete theDevice;
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exit (22);
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}
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else
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cerr << "there might be a DAB signal here" << endl;
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if (!ensembleRecognized. load ())
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while (!ensembleRecognized. load () && (++timeOut < latency)) {
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fprintf (stderr, "%d\r", latency - timeOut);
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sleep (1);
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}
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fprintf (stderr, "\n");
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if (!ensembleRecognized. load ()) {
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fprintf (stderr, "no ensemble data found, fatal\n");
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theDevice -> stopReader ();
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sleep (1);
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dabExit (theRadio);
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delete theDevice;
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exit (22);
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}
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run. store (true);
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if (serviceId != -1) {
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char pn [255];
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dab_getserviceName (theRadio, serviceId, pn);
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programName = std::string (pn);
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}
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std::cerr << "we try to start program " <<
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programName << "\n";
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if (!is_audioService (theRadio, programName. c_str ())) {
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std::cerr << "sorry we cannot handle service " <<
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programName << "\n";
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run. store (false);
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}
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audiodata ad;
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if (run. load() ) {
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dataforAudioService (theRadio, programName. c_str (), &ad, 0);
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if (!ad. defined) {
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std::cerr << "sorry we cannot handle service " <<
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programName << "\n";
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run. store (false);
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}
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}
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if (run. load ()) {
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dabReset_msc (theRadio);
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set_audioChannel (theRadio, &ad);
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}
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while (run. load ())
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sleep (1);
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theDevice -> stopReader ();
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dabExit (theRadio);
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}
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