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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 int gNumOscillators = 32;
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17 int gWavetableLength = 1024;
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18
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19
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20 // Handle Ctrl-C by requesting that the audio rendering stop
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21 void interrupt_handler(int var)
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22 {
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23 gShouldStop = true;
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24 }
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25
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26 // Print usage information
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27 void usage(const char * processName)
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28 {
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29 cerr << "Usage: " << processName << " [-h] [-v] [-p period] [-f input] [-a input]" << endl;
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30 cerr << " -h: Print this menu\n";
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31 cerr << " -v: Enable verbose messages\n";
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32 cerr << " -p period: Set the period (hardware buffer) size in sensor frames\n";
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33 cerr << " -n oscs: Set the number of oscillators to use (default: 32)\n";
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34 cerr << " -w length: Set the wavetable length in samples (default: 1024)\n";
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35 cerr << " -m: Enable the matrix (ADC and DAC) for controlling parameters\n";
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36 }
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37
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38 int main(int argc, char *argv[])
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39 {
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40 int periodSize = 8; // Period size in sensor frames
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41 int verbose = 0; // Verbose printing level
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42 int useMatrix = 0;
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43
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44 // Parse command-line arguments
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45 while (1) {
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46 int c;
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47 if ((c = getopt(argc, argv, "hp:vn:w:m")) < 0)
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48 break;
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49 switch (c) {
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50 case 'h':
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51 usage(basename(argv[0]));
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52 exit(0);
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53 case 'p':
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54 periodSize = atoi(optarg);
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55 if(periodSize < 1)
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56 periodSize = 1;
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57 break;
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58 case 'v':
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59 verbose = 1;
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60 break;
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61 case 'n':
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62 gNumOscillators = atoi(optarg);
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63 if(gNumOscillators <= 0) {
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64 usage(basename(argv[0]));
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65 exit(0);
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66 }
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67 break;
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68 case 'w':
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69 gWavetableLength = atoi(optarg);
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70 if(gWavetableLength < 4)
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71 gWavetableLength = 4;
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72 if(gWavetableLength > 16384)
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73 gWavetableLength = 16384;
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74 break;
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75 case 'm':
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76 useMatrix = 1;
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77 break;
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78 case '?':
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79 default:
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80 usage(basename(argv[0]));
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81 exit(1);
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82 }
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83 }
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84
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85
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86 // Set verbose logging information (optional by using value > 0; default is 0)
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87 setVerboseLevel(verbose);
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88
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89 if(verbose) {
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90 cout << "Starting with period size " << periodSize << endl;
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91 cout << "--> Using " << gNumOscillators << " oscillators and wavetable of " << gWavetableLength << " samples\n";
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92 cout << "--> Matrix ";
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93 if(useMatrix) cout << "enabled\n";
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94 else cout << "disabled\n";
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95 }
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96
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97 // Initialise the PRU audio device
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98 if(initAudio(periodSize, useMatrix, 0) != 0) {
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99 cout << "Error: unable to initialise audio" << endl;
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100 return -1;
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101 }
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102
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103 // Start the audio device running
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104 if(startAudio()) {
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105 cout << "Error: unable to start real-time audio" << endl;
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106 return -1;
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107 }
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108
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109 // Set up interrupt handler to catch Control-C
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110 signal(SIGINT, interrupt_handler);
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111
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112 // Run until told to stop
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113 while(!gShouldStop) {
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114 usleep(100000);
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115 }
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116
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117 // Stop the audio device
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118 stopAudio();
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119
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120 if(verbose) {
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121 cout << "Cleaning up..." << endl;
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122 }
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123
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124 // Clean up any resources allocated for audio
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125 cleanupAudio();
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126
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127 // All done!
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128 return 0;
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129 }
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