chris@543: /*
chris@543:  ____  _____ _        _    
chris@543: | __ )| ____| |      / \   
chris@543: |  _ \|  _| | |     / _ \  
chris@543: | |_) | |___| |___ / ___ \ 
chris@543: |____/|_____|_____/_/   \_\
chris@543: 
chris@543: The platform for ultra-low latency audio and sensor processing
chris@543: 
chris@543: http://bela.io
chris@543: 
chris@543: A project of the Augmented Instruments Laboratory within the
chris@543: Centre for Digital Music at Queen Mary University of London.
chris@543: http://www.eecs.qmul.ac.uk/~andrewm
chris@543: 
chris@543: (c) 2016 Augmented Instruments Laboratory: Andrew McPherson,
chris@543: 	Astrid Bin, Liam Donovan, Christian Heinrichs, Robert Jack,
chris@543: 	Giulio Moro, Laurel Pardue, Victor Zappi. All rights reserved.
chris@543: 
chris@543: The Bela software is distributed under the GNU Lesser General Public License
chris@543: (LGPL 3.0), available here: https://www.gnu.org/licenses/lgpl-3.0.txt
chris@543: */
chris@543: 
chris@543: #include <unistd.h>
chris@543: #include <iostream>
chris@543: #include <cstdlib>
chris@543: #include <libgen.h>
chris@543: #include <signal.h>
chris@543: #include <getopt.h>
chris@543: #include <Bela.h>
chris@543: 
chris@543: using namespace std;
chris@543: 
chris@543: // Handle Ctrl-C by requesting that the audio rendering stop
chris@543: void interrupt_handler(int var)
chris@543: {
chris@543: 	gShouldStop = true;
chris@543: }
chris@543: 
chris@543: // Print usage information
chris@543: void usage(const char * processName)
chris@543: {
chris@543: 	cerr << "Usage: " << processName << " [options]" << endl;
chris@543: 
chris@543: 	Bela_usage();
chris@543: 
chris@543: 	cerr << "   --frequency [-f] frequency: Set the frequency of the oscillator\n";
chris@543: 	cerr << "   --help [-h]:                Print this menu\n";
chris@543: }
chris@543: 
chris@543: int main(int argc, char *argv[])
chris@543: {
chris@543: 	BelaInitSettings settings;	// Standard audio settings
chris@543: 	float frequency = 440.0;	// Frequency of oscillator
chris@543: 
chris@543: 	struct option customOptions[] =
chris@543: 	{
chris@543: 		{"help", 0, NULL, 'h'},
chris@543: 		{"frequency", 1, NULL, 'f'},
chris@543: 		{NULL, 0, NULL, 0}
chris@543: 	};
chris@543: 
chris@543: 	// Set default settings
chris@543: 	Bela_defaultSettings(&settings);
chris@543: 
chris@543: 	// Parse command-line arguments
chris@543: 	while (1) {
chris@543: 		int c;
chris@543: 		if ((c = Bela_getopt_long(argc, argv, "hf:", customOptions, &settings)) < 0)
chris@543: 				break;
chris@543: 		switch (c) {
chris@543: 		case 'h':
chris@543: 				usage(basename(argv[0]));
chris@543: 				exit(0);
chris@543: 		case 'f':
chris@543: 				frequency = atof(optarg);
chris@543: 				break;
chris@543: 		case '?':
chris@543: 		default:
chris@543: 				usage(basename(argv[0]));
chris@543: 				exit(1);
chris@543: 		}
chris@543: 	}
chris@543: 
chris@543: 	// Initialise the PRU audio device
chris@543: 
chris@543: 	/* 
chris@543: 	 *  Note how we are passing the frequency parameter so that it
chris@543: 	 *  can be read from the setup() function inside render.cpp
chris@543: 	 */
chris@543: 
chris@543: 	if(Bela_initAudio(&settings, &frequency) != 0) {
chris@543: 		cout << "Error: unable to initialise audio" << endl;
chris@543: 		return -1;
chris@543: 	}
chris@543: 
chris@543: 	// Start the audio device running
chris@543: 	if(Bela_startAudio()) {
chris@543: 		cout << "Error: unable to start real-time audio" << endl;
chris@543: 		return -1;
chris@543: 	}
chris@543: 
chris@543: 	// Set up interrupt handler to catch Control-C and SIGTERM
chris@543: 	signal(SIGINT, interrupt_handler);
chris@543: 	signal(SIGTERM, interrupt_handler);
chris@543: 
chris@543: 	// Run until told to stop
chris@543: 	while(!gShouldStop) {
chris@543: 		usleep(100000);
chris@543: 	}
chris@543: 
chris@543: 	// Stop the audio device
chris@543: 	Bela_stopAudio();
chris@543: 
chris@543: 	// Clean up any resources allocated for audio
chris@543: 	Bela_cleanupAudio();
chris@543: 
chris@543: 	// All done!
chris@543: 	return 0;
chris@543: }