andrewm@0: /*
andrewm@0:  * main.cpp
andrewm@0:  *
andrewm@0:  *  Created on: Oct 24, 2014
andrewm@0:  *      Author: parallels
andrewm@0:  */
andrewm@0: 
andrewm@0: #include <iostream>
andrewm@0: #include <cstdlib>
andrewm@0: #include <libgen.h>
andrewm@0: #include <signal.h>
andrewm@5: #include <getopt.h>
giuliomoro@301: #include <Bela.h>
andrewm@0: 
andrewm@0: using namespace std;
andrewm@0: 
andrewm@0: int gNumOscillators = 32;
andrewm@0: int gWavetableLength = 1024;
andrewm@0: 
andrewm@0: // Handle Ctrl-C by requesting that the audio rendering stop
andrewm@0: void interrupt_handler(int var)
andrewm@0: {
andrewm@0: 	gShouldStop = true;
andrewm@0: }
andrewm@0: 
andrewm@0: // Print usage information
andrewm@0: void usage(const char * processName)
andrewm@0: {
andrewm@5: 	cerr << "Usage: " << processName << " [options]" << endl;
andrewm@5: 
giuliomoro@301: 	Bela_usage();
andrewm@5: 
andrewm@5: 	cerr << "   --num-oscillators [-n] oscs: Set the number of oscillators to use (default: 32)\n";
andrewm@5: 	cerr << "   --wavetable [-w] length:     Set the wavetable length in samples (default: 1024)\n";
andrewm@5: 	cerr << "   --help [-h]:                 Print this menu\n";
andrewm@0: }
andrewm@0: 
andrewm@0: int main(int argc, char *argv[])
andrewm@0: {
giuliomoro@301: 	BelaInitSettings settings;	// Standard audio settings
andrewm@5: 
andrewm@5: 	struct option customOptions[] =
andrewm@5: 	{
andrewm@5: 		{"help", 0, NULL, 'h'},
andrewm@5: 		{"num-oscillators", 1, NULL, 'n'},
andrewm@5: 		{"wavetable", 1, NULL, 'w'},
andrewm@5: 		{NULL, 0, NULL, 0}
andrewm@5: 	};
andrewm@5: 
andrewm@5: 	// Set default settings
giuliomoro@301: 	Bela_defaultSettings(&settings);
andrewm@0: 
andrewm@0: 	// Parse command-line arguments
andrewm@0: 	while (1) {
andrewm@0: 		int c;
giuliomoro@301: 		if ((c = Bela_getopt_long(argc, argv, "hn:w:", customOptions, &settings)) < 0)
andrewm@0: 				break;
andrewm@0: 		switch (c) {
andrewm@0: 		case 'h':
andrewm@0: 				usage(basename(argv[0]));
andrewm@0: 				exit(0);
andrewm@0: 		case 'n':
andrewm@0: 				gNumOscillators = atoi(optarg);
andrewm@0: 				if(gNumOscillators <= 0) {
andrewm@0: 					usage(basename(argv[0]));
andrewm@0: 					exit(0);
andrewm@0: 				}
andrewm@0: 				break;
andrewm@0: 		case 'w':
andrewm@0: 				gWavetableLength = atoi(optarg);
andrewm@0: 				if(gWavetableLength < 4)
andrewm@0: 					gWavetableLength = 4;
andrewm@0: 				if(gWavetableLength > 16384)
andrewm@0: 					gWavetableLength = 16384;
andrewm@0: 				break;
andrewm@0: 		case '?':
andrewm@0: 		default:
andrewm@0: 				usage(basename(argv[0]));
andrewm@0: 				exit(1);
andrewm@0: 		}
andrewm@0: 	}
andrewm@0: 
andrewm@0: 	// Initialise the PRU audio device
giuliomoro@301: 	if(Bela_initAudio(&settings, 0) != 0) {
andrewm@0: 		cout << "Error: unable to initialise audio" << endl;
andrewm@0: 		return -1;
andrewm@0: 	}
andrewm@0: 
andrewm@5: 	if(settings.verbose) {
andrewm@5: 		cout << "--> Using " << gNumOscillators << " oscillators and wavetable of " << gWavetableLength << " samples\n";
andrewm@5: 	}
andrewm@5: 
andrewm@0: 	// Start the audio device running
giuliomoro@301: 	if(Bela_startAudio()) {
andrewm@0: 		cout << "Error: unable to start real-time audio" << endl;
andrewm@0: 		return -1;
andrewm@0: 	}
andrewm@0: 
andrewm@15: 	// Set up interrupt handler to catch Control-C and SIGTERM
andrewm@0: 	signal(SIGINT, interrupt_handler);
andrewm@15: 	signal(SIGTERM, interrupt_handler);
andrewm@0: 
andrewm@0: 	// Run until told to stop
andrewm@0: 	while(!gShouldStop) {
andrewm@0: 		usleep(100000);
andrewm@0: 	}
andrewm@0: 
andrewm@0: 	// Stop the audio device
giuliomoro@301: 	Bela_stopAudio();
andrewm@0: 
andrewm@0: 	// Clean up any resources allocated for audio
giuliomoro@301: 	Bela_cleanupAudio();
andrewm@0: 
andrewm@0: 	// All done!
andrewm@0: 	return 0;
andrewm@0: }