robert@493: /*
robert@493:  * main.cpp
robert@493:  *
robert@493:  *  Created on: Oct 24, 2014
robert@493:  *      Author: parallels
robert@493:  */
robert@493: 
robert@493: #include <iostream>
robert@493: #include <cstdlib>
robert@493: #include <libgen.h>
robert@493: #include <signal.h>
robert@493: #include <getopt.h>
robert@493: #include <Bela.h>
robert@493: 
robert@493: using namespace std;
robert@493: 
robert@493: int gNumOscillators = 32;
robert@493: int gWavetableLength = 1024;
robert@493: 
robert@493: // Handle Ctrl-C by requesting that the audio rendering stop
robert@493: void interrupt_handler(int var)
robert@493: {
robert@493: 	gShouldStop = true;
robert@493: }
robert@493: 
robert@493: // Print usage information
robert@493: void usage(const char * processName)
robert@493: {
robert@493: 	cerr << "Usage: " << processName << " [options]" << endl;
robert@493: 
robert@493: 	Bela_usage();
robert@493: 
robert@493: 	cerr << "   --num-oscillators [-n] oscs: Set the number of oscillators to use (default: 32)\n";
robert@493: 	cerr << "   --wavetable [-w] length:     Set the wavetable length in samples (default: 1024)\n";
robert@493: 	cerr << "   --help [-h]:                 Print this menu\n";
robert@493: }
robert@493: 
robert@493: int main(int argc, char *argv[])
robert@493: {
robert@493: 	BelaInitSettings settings;	// Standard audio settings
robert@493: 
robert@493: 	struct option customOptions[] =
robert@493: 	{
robert@493: 		{"help", 0, NULL, 'h'},
robert@493: 		{"num-oscillators", 1, NULL, 'n'},
robert@493: 		{"wavetable", 1, NULL, 'w'},
robert@493: 		{NULL, 0, NULL, 0}
robert@493: 	};
robert@493: 
robert@493: 	// Set default settings
robert@493: 	Bela_defaultSettings(&settings);
robert@493: 
robert@493: 	// Parse command-line arguments
robert@493: 	while (1) {
robert@493: 		int c;
robert@493: 		if ((c = Bela_getopt_long(argc, argv, "hn:w:", customOptions, &settings)) < 0)
robert@493: 				break;
robert@493: 		switch (c) {
robert@493: 		case 'h':
robert@493: 				usage(basename(argv[0]));
robert@493: 				exit(0);
robert@493: 		case 'n':
robert@493: 				gNumOscillators = atoi(optarg);
robert@493: 				if(gNumOscillators <= 0) {
robert@493: 					usage(basename(argv[0]));
robert@493: 					exit(0);
robert@493: 				}
robert@493: 				break;
robert@493: 		case 'w':
robert@493: 				gWavetableLength = atoi(optarg);
robert@493: 				if(gWavetableLength < 4)
robert@493: 					gWavetableLength = 4;
robert@493: 				if(gWavetableLength > 16384)
robert@493: 					gWavetableLength = 16384;
robert@493: 				break;
robert@493: 		case '?':
robert@493: 		default:
robert@493: 				usage(basename(argv[0]));
robert@493: 				exit(1);
robert@493: 		}
robert@493: 	}
robert@493: 
robert@493: 	// Initialise the PRU audio device
robert@493: 	if(Bela_initAudio(&settings, 0) != 0) {
robert@493: 		cout << "Error: unable to initialise audio" << endl;
robert@493: 		return -1;
robert@493: 	}
robert@493: 
robert@493: 	if(settings.verbose) {
robert@493: 		cout << "--> Using " << gNumOscillators << " oscillators and wavetable of " << gWavetableLength << " samples\n";
robert@493: 	}
robert@493: 
robert@493: 	// Start the audio device running
robert@493: 	if(Bela_startAudio()) {
robert@493: 		cout << "Error: unable to start real-time audio" << endl;
robert@493: 		return -1;
robert@493: 	}
robert@493: 
robert@493: 	// Set up interrupt handler to catch Control-C and SIGTERM
robert@493: 	signal(SIGINT, interrupt_handler);
robert@493: 	signal(SIGTERM, interrupt_handler);
robert@493: 
robert@493: 	// Run until told to stop
robert@493: 	while(!gShouldStop) {
robert@493: 		usleep(100000);
robert@493: 	}
robert@493: 
robert@493: 	// Stop the audio device
robert@493: 	Bela_stopAudio();
robert@493: 
robert@493: 	// Clean up any resources allocated for audio
robert@493: 	Bela_cleanupAudio();
robert@493: 
robert@493: 	// All done!
robert@493: 	return 0;
robert@493: }