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1 /*
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2 * main.cpp
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3 *
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4 * Created on: Oct 24, 2014
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5 * Author: parallels
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6 */
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7
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8 #include <iostream>
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9 #include <cstdlib>
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10 #include <libgen.h>
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11 #include <signal.h>
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12 #include "../../include/RTAudio.h"
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13
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14 using namespace std;
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15
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16 // Handle Ctrl-C by requesting that the audio rendering stop
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17 void interrupt_handler(int var)
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18 {
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19 gShouldStop = true;
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20 }
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21
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22 // Print usage information
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23 void usage(const char * processName)
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24 {
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25 cerr << "Usage: " << processName << " [-h] [-v] [-p period] [-f frequency]" << endl;
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26 cerr << " -h: Print this menu\n";
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27 cerr << " -v: Enable verbose messages\n";
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28 cerr << " -p period: Set the period (hardware buffer) size in sensor frames\n";
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29 cerr << " -f frequency: Set the frequency of the oscillator\n";
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30 cerr << " -m: Enable the matrix (ADC and DAC) as well as audio\n";
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31 }
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32
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33 int main(int argc, char *argv[])
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34 {
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35 int periodSize = 8; // Period size in sensor frames
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36 int verbose = 0; // Verbose printing level
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37 float frequency = 440.0; // Frequency of oscillator
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38 int useMatrix = 0; // Whether to use the matrix or just audio
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39
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40 // Parse command-line arguments
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41 while (1) {
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42 int c;
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43 if ((c = getopt(argc, argv, "hp:vf:m")) < 0)
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44 break;
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45 switch (c) {
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46 case 'h':
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47 usage(basename(argv[0]));
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48 exit(0);
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49 case 'p':
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50 periodSize = atoi(optarg);
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51 if(periodSize < 1)
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52 periodSize = 1;
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53 break;
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54 case 'v':
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55 verbose = 1;
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56 break;
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57 case 'f':
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58 frequency = atof(optarg);
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59 break;
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60 case 'm':
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61 useMatrix = 1;
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62 break;
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63 case '?':
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64 default:
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65 usage(basename(argv[0]));
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66 exit(1);
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67 }
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68 }
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69
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70
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71 // Set verbose logging information (optional by using value > 0; default is 0)
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72 setVerboseLevel(verbose);
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73
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74 if(verbose) {
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75 cout << "Starting with period size " << periodSize << " and frequency " << frequency << endl;
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76 if(useMatrix)
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77 cout << "Matrix enabled\n";
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78 else
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79 cout << "Matrix disabled\n";
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80 }
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81
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82 // Initialise the PRU audio device
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83 if(initAudio(periodSize, useMatrix, &frequency) != 0) {
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84 cout << "Error: unable to initialise audio" << endl;
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85 return -1;
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86 }
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87
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88 // Start the audio device running
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89 if(startAudio()) {
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90 cout << "Error: unable to start real-time audio" << endl;
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91 return -1;
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92 }
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93
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94 // Set up interrupt handler to catch Control-C
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95 signal(SIGINT, interrupt_handler);
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96
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97 // Run until told to stop
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98 while(!gShouldStop) {
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99 usleep(100000);
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100 }
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101
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102 // Stop the audio device
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103 stopAudio();
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104
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105 if(verbose) {
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106 cout << "Cleaning up..." << endl;
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107 }
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108
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109 // Clean up any resources allocated for audio
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110 cleanupAudio();
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111
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112 // All done!
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113 return 0;
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114 }
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