comparison examples/10-Instruments/tank_wars/main.cpp @ 464:8fcfbfb32aa0 prerelease

Examples reorder with subdirectories. Added header to each project. Moved Doxygen to bottom of render.cpp.

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