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); }