mirror of
https://github.com/JvanKatwijk/dab-cmdline
synced 2025-10-05 23:52:50 +02:00
350 lines
9.4 KiB
C++
350 lines
9.4 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 Programming
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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 "audiosink.h"
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#include "dab-class.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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dabClass *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 serviceIdentifier = -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 ensemblenameHandler (std::string name, int Id, void *userData) {
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fprintf (stderr, "ensemble %s is (%X) recognized\n",
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name. c_str (), (uint32_t)Id);
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ensembleRecognized. store (true);
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}
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static
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void programnameHandler (std::string s, int SId, void * userdata) {
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fprintf (stderr, "%s (%X) is part of the ensemble\n", s. c_str (), SId);
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}
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static
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void programdataHandler (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 (std::string dynamicLabel, void *ctx) {
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(void)ctx;
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// fprintf (stderr, "%s\n", dynamicLabel. c_str ());
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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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int theGain = 35; // scale = 0 .. 100
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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");
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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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fprintf (stderr, "opt = %c\n", opt);
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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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case 'G':
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theGain = atoi (optarg);
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break;
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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 'L':
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latency = atoi (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 >> serviceIdentifier;
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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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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);
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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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#endif
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}
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catch (int e) {
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fprintf (stderr, "allocating device failed (%d), fatal\n", e);
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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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//
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// and a sound device
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theRadio = new dabClass (theDevice,
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theMode,
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NULL, // no spectrum shown
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NULL, // no constellations
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syncsignalHandler,
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systemData,
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ensemblenameHandler,
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programnameHandler,
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fibQuality,
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pcmHandler,
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dataOut_Handler,
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programdataHandler,
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mscQuality,
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NULL
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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 -> setVFOFrequency (frequency);
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theDevice -> restartReader ();
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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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theRadio -> startProcessing ();
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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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theRadio -> stop ();
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delete 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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theRadio -> reset ();
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delete theRadio;
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delete theDevice;
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exit (22);
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}
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fprintf (stderr, "going to start program %s\n", programName. c_str ());
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run. store (true);
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if (serviceIdentifier != -1)
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programName = theRadio -> dab_getserviceName (serviceIdentifier);
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if (theRadio -> dab_service (programName) < 0) {
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fprintf (stderr, "sorry we cannot handle service %s\n",
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programName. c_str ());
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run. store (false);
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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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theRadio -> reset ();
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delete theRadio;
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delete theDevice;
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}
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