TrackAnalyzer(String[] args) throws Exception {
JCommander jcommander = new JCommander(c, args);
jcommander.setProgramName("TrackAnalyzer");
if ((c.filenames.size() == 0 && Utils.isEmpty(c.filelist)) || c.help) {
jcommander.usage();
System.exit(-1);
}
if (c.debug) {
Logger.getLogger(TrackAnalyzer.class.getName()).setLevel(Level.ALL);
} else {
Logger.getLogger(TrackAnalyzer.class.getName()).setLevel(Level.WARNING);
}
// we have a list, read all the filenames in the list and
// collect them in 'filenames'
if (!Utils.isEmpty(c.filelist)) {
try {
// use buffering, reading one line at a time
// FileReader always assumes default encoding is OK!
BufferedReader input = new BufferedReader(new FileReader(new File(c.filelist)));
try {
String line = null; // not declared within while loop
/*
* readLine is a bit quirky :
* it returns the content of a line MINUS the newline.
* it returns null only for the END of the stream.
* it returns an empty String if two newlines appear in a row.
*/
while ((line = input.readLine()) != null) {
filenames.add(line);
}
} finally {
input.close();
}
} catch (IOException ex) {
ex.printStackTrace();
System.exit(-1);
}
}
// add filenames from command line
filenames.addAll(c.filenames);
if (!Utils.isEmpty(c.writeList)) {
try {
writeListWriter = new BufferedWriter(new FileWriter(c.writeList));
} catch (IOException ex) {
Logger.getLogger(TrackAnalyzer.class.getName()).log(Level.SEVERE, null, ex);
}
}
k = new KeyFinder();
p = new Parameters();
p.setHopSize(8192);
}
/**
* This is the main loop of the program. For every file in the filenames list, the file gets
* decoded and downsampled to a 4410 hz mono wav file. Then key and bpm detectors are run, the
* result is logged in a txt file and written to the tag if possible.
*/
public void run() throws ExecutionException {
int nThreads = Runtime.getRuntime().availableProcessors();
ExecutorService threadPool = Executors.newFixedThreadPool(nThreads);
CompletionService<Boolean> pool;
pool = new ExecutorCompletionService<Boolean>(threadPool);
nextFile:
for (String filename : filenames) {
// new worker thread
pool.submit(new WorkTrack(filename));
}
for (int i = 0; i < filenames.size(); i++) {
Boolean result;
// Compute the result
try {
result = pool.take().get();
} catch (InterruptedException e) {
Logger.getLogger(TrackAnalyzer.class.getName()).log(Level.SEVERE, null, e);
}
}
threadPool.shutdown();
if (!Utils.isEmpty(c.writeList)) {
try {
writeListWriter.close();
} catch (IOException ex) {
Logger.getLogger(TrackAnalyzer.class.getName()).log(Level.SEVERE, null, ex);
}
}
System.exit(0);
}
/**
* this writes a line to a txt file with the result of the detection process for one file.
*
* @param filename the filename of the audio file we just processed
* @param key the result of the key detector (or "-")
* @param bpm the result of the bpm detector (or "-")
* @param wroteTags true if tags were written successfully
*/
public void logDetectionResult(String filename, String key, String bpm, boolean wroteTags) {
if (!Utils.isEmpty(c.writeList)) {
try {
writeListWriter.write(filename + ";" + key + ";" + bpm + ";" + wroteTags);
writeListWriter.newLine();
writeListWriter.flush();
} catch (IOException ex) {
Logger.getLogger(TrackAnalyzer.class.getName()).log(Level.SEVERE, null, ex);
}
}
}