robert@464: /*
robert@464:  * main.cpp
robert@464:  *
robert@464:  *  Created on: Oct 24, 2014
robert@464:  *      Author: parallels
robert@464:  */
robert@464: 
robert@464: #include <iostream>
robert@464: #include <cstdlib>
robert@464: #include <libgen.h>
robert@464: #include <signal.h>
robert@464: #include <getopt.h>
robert@464: #include <sndfile.h>
robert@464: #include <Bela.h>
robert@464: 
robert@464: extern int gScreenFramesPerSecond;
robert@464: 
robert@464: float *gMusicBuffer = 0;
robert@464: int gMusicBufferLength = 0;
robert@464: float *gSoundBoomBuffer = 0;
robert@464: int gSoundBoomBufferLength = 0;
robert@464: float *gSoundHitBuffer = 0;
robert@464: int gSoundHitBufferLength = 0;
robert@464: 
robert@464: 
robert@464: using namespace std;
robert@464: 
robert@464: // Load a sound sample from file
robert@464: int loadSoundFile(const string& path, float **buffer, int *bufferLength)
robert@464: {
robert@464: 	SNDFILE *sndfile ;
robert@464: 	SF_INFO sfinfo ;
robert@464: 
robert@464: 	if (!(sndfile = sf_open (path.c_str(), SFM_READ, &sfinfo))) {
robert@464: 		cout << "Couldn't open file " << path << endl;
robert@464: 		return 1;
robert@464: 	}
robert@464: 
robert@464: 	int numChan = sfinfo.channels;
robert@464: 	if(numChan != 1)
robert@464: 	{
robert@464: 		cout << "Error: " << path << " is not a mono file" << endl;
robert@464: 		return 1;
robert@464: 	}
robert@464: 
robert@464: 	*bufferLength = sfinfo.frames * numChan;
robert@464: 	*buffer = new float[*bufferLength];
robert@464: 	if(*buffer == 0){
robert@464: 		cout << "Could not allocate buffer" << endl;
robert@464: 		return 1;
robert@464: 	}
robert@464: 
robert@464: 	int subformat = sfinfo.format & SF_FORMAT_SUBMASK;
robert@464: 	int readcount = sf_read_float(sndfile, *buffer, *bufferLength);
robert@464: 
robert@464: 	// Pad with zeros in case we couldn't read whole file
robert@464: 	for(int k = readcount; k < *bufferLength; k++)
robert@464: 		(*buffer)[k] = 0;
robert@464: 
robert@464: 	sf_close(sndfile);
robert@464: 	return 0;
robert@464: }
robert@464: 
robert@464: // Handle Ctrl-C by requesting that the audio rendering stop
robert@464: void interrupt_handler(int var)
robert@464: {
robert@464: 	gShouldStop = true;
robert@464: }
robert@464: 
robert@464: // Print usage information
robert@464: void usage(const char * processName)
robert@464: {
robert@464: 	cerr << "Usage: " << processName << " [options]" << endl;
robert@464: 
robert@464: 	Bela_usage();
robert@464: 
robert@464: 	cerr << "   --fps [-f] value:           Set target frames per second\n";
robert@464: 	cerr << "   --help [-h]:                Print this menu\n";
robert@464: }
robert@464: 
robert@464: int main(int argc, char *argv[])
robert@464: {
robert@464: 	BelaInitSettings settings;	// Standard audio settings
robert@464: 	string musicFileName = "music.wav";
robert@464: 	string soundBoomFileName = "boom.wav";
robert@464: 	string soundHitFileName = "hit.wav";
robert@464: 	
robert@464: 	struct option customOptions[] =
robert@464: 	{
robert@464: 		{"help", 0, NULL, 'h'},
robert@464: 		{"fps", 1, NULL, 'f'},
robert@464: 		{NULL, 0, NULL, 0}
robert@464: 	};
robert@464: 
robert@464: 	// Set default settings
robert@464: 	Bela_defaultSettings(&settings);
robert@464: 
robert@464: 	// Parse command-line arguments
robert@464: 	while (1) {
robert@464: 		int c;
robert@464: 		if ((c = Bela_getopt_long(argc, argv, "hf:", customOptions, &settings)) < 0)
robert@464: 				break;
robert@464: 		switch (c) {
robert@464: 		case 'f':
robert@464: 				gScreenFramesPerSecond = atoi(optarg);
robert@464: 				if(gScreenFramesPerSecond < 1)
robert@464: 					gScreenFramesPerSecond = 1;
robert@464: 				if(gScreenFramesPerSecond > 100)
robert@464: 					gScreenFramesPerSecond = 100;
robert@464: 				break;
robert@464: 		case 'h':
robert@464: 				usage(basename(argv[0]));
robert@464: 				exit(0);
robert@464: 		case '?':
robert@464: 		default:
robert@464: 				usage(basename(argv[0]));
robert@464: 				exit(1);
robert@464: 		}
robert@464: 	}
robert@464: 
robert@464: 	// Load the sound files
robert@464: 	if(loadSoundFile(musicFileName, &gMusicBuffer, &gMusicBufferLength) != 0) {
robert@464: 		cout << "Warning: unable to load sound file " << musicFileName << endl;
robert@464: 	}
robert@464: 	if(loadSoundFile(soundBoomFileName, &gSoundBoomBuffer, &gSoundBoomBufferLength) != 0) {
robert@464: 		cout << "Warning: unable to load sound file " << soundBoomFileName << endl;
robert@464: 	}
robert@464: 	if(loadSoundFile(soundHitFileName, &gSoundHitBuffer, &gSoundHitBufferLength) != 0) {
robert@464: 		cout << "Warning: unable to load sound file " << soundHitFileName << endl;
robert@464: 	}
robert@464: 	
robert@464: 	// Initialise the PRU audio device
robert@464: 	if(Bela_initAudio(&settings, 0) != 0) {
robert@464: 		cout << "Error: unable to initialise audio" << endl;
robert@464: 		return -1;
robert@464: 	}
robert@464: 
robert@464: 	// Start the audio device running
robert@464: 	if(Bela_startAudio()) {
robert@464: 		cout << "Error: unable to start real-time audio" << endl;
robert@464: 		return -1;
robert@464: 	}
robert@464: 
robert@464: 	// Set up interrupt handler to catch Control-C and SIGTERM
robert@464: 	signal(SIGINT, interrupt_handler);
robert@464: 	signal(SIGTERM, interrupt_handler);
robert@464: 
robert@464: 	// Run until told to stop
robert@464: 	while(!gShouldStop) {
robert@464: 		usleep(100000);
robert@464: 	}
robert@464: 
robert@464: 	// Stop the audio device
robert@464: 	Bela_stopAudio();
robert@464: 
robert@464: 	// Clean up any resources allocated for audio
robert@464: 	Bela_cleanupAudio();
robert@464: 
robert@464: 	// Release sound files
robert@464: 	if(gMusicBuffer != 0)
robert@464: 		free(gMusicBuffer);
robert@464: 	if(gSoundBoomBuffer != 0)
robert@464: 		free(gSoundBoomBuffer);
robert@464: 	if(gSoundHitBuffer != 0)
robert@464: 		free(gSoundHitBuffer);
robert@464: 	
robert@464: 	// All done!
robert@464: 	return 0;
robert@464: }