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@0: #include "../../include/RTAudio.h"
andrewm@0: 
andrewm@0: using namespace std;
andrewm@0: 
andrewm@0: int gNumOscillators = 32;
andrewm@0: int gWavetableLength = 1024;
andrewm@0: 
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@0: 	cerr << "Usage: " << processName << " [-h] [-v] [-p period] [-f input] [-a input]" << endl;
andrewm@0: 	cerr << "   -h:           Print this menu\n";
andrewm@0: 	cerr << "   -v:           Enable verbose messages\n";
andrewm@0: 	cerr << "   -p period:    Set the period (hardware buffer) size in sensor frames\n";
andrewm@0:     cerr << "   -n oscs:      Set the number of oscillators to use (default: 32)\n";
andrewm@0:     cerr << "   -w length:    Set the wavetable length in samples (default: 1024)\n";
andrewm@0: 	cerr << "   -m:           Enable the matrix (ADC and DAC) for controlling parameters\n";
andrewm@0: }
andrewm@0: 
andrewm@0: int main(int argc, char *argv[])
andrewm@0: {
andrewm@0: 	int periodSize = 8;			// Period size in sensor frames
andrewm@0: 	int verbose = 0;			// Verbose printing level
andrewm@0: 	int useMatrix = 0;
andrewm@0: 
andrewm@0: 	// Parse command-line arguments
andrewm@0: 	while (1) {
andrewm@0: 		int c;
andrewm@0: 		if ((c = getopt(argc, argv, "hp:vn:w:m")) < 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 'p':
andrewm@0: 				periodSize = atoi(optarg);
andrewm@0: 				if(periodSize < 1)
andrewm@0: 					periodSize = 1;
andrewm@0: 				break;
andrewm@0: 		case 'v':
andrewm@0: 				verbose = 1;
andrewm@0: 				break;
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 'm':
andrewm@0: 				useMatrix = 1;
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: 
andrewm@0: 	// Set verbose logging information (optional by using value > 0; default is 0)
andrewm@0: 	setVerboseLevel(verbose);
andrewm@0: 
andrewm@0: 	if(verbose) {
andrewm@0: 		cout << "Starting with period size " << periodSize << endl;
andrewm@0: 		cout << "--> Using " << gNumOscillators << " oscillators and wavetable of " << gWavetableLength << " samples\n";
andrewm@0: 		cout << "--> Matrix ";
andrewm@0: 		if(useMatrix) cout << "enabled\n";
andrewm@0: 		else cout << "disabled\n";
andrewm@0: 	}
andrewm@0: 
andrewm@0: 	// Initialise the PRU audio device
andrewm@0: 	if(initAudio(periodSize, useMatrix, 0) != 0) {
andrewm@0: 		cout << "Error: unable to initialise audio" << endl;
andrewm@0: 		return -1;
andrewm@0: 	}
andrewm@0: 
andrewm@0: 	// Start the audio device running
andrewm@0: 	if(startAudio()) {
andrewm@0: 		cout << "Error: unable to start real-time audio" << endl;
andrewm@0: 		return -1;
andrewm@0: 	}
andrewm@0: 
andrewm@0: 	// Set up interrupt handler to catch Control-C
andrewm@0: 	signal(SIGINT, 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
andrewm@0: 	stopAudio();
andrewm@0: 
andrewm@0: 	if(verbose) {
andrewm@0: 		cout << "Cleaning up..." << endl;
andrewm@0: 	}
andrewm@0: 
andrewm@0: 	// Clean up any resources allocated for audio
andrewm@0: 	cleanupAudio();
andrewm@0: 
andrewm@0: 	// All done!
andrewm@0: 	return 0;
andrewm@0: }