plectrum

Plectrum: instrument tuner for Android
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FFMPEGDownloader.java (3407B)

      1 package be.tarsos.dsp.util;
      2 
      3 import java.io.File;
      4 import java.io.FileOutputStream;
      5 import java.io.IOException;
      6 import java.net.MalformedURLException;
      7 import java.net.URL;
      8 import java.nio.channels.Channels;
      9 import java.nio.channels.ReadableByteChannel;
     10 import java.util.logging.Logger;
     11 
     12 /**
     13  * Downloads a static ffmpeg binary for several platforms:
     14  * Windows x64 and x32
     15  * Max OS X x64
     16  * Linux x32 and x64
     17  * The code tries to determine the correct platform and downloads it to 
     18  * the temporary directory <code>System.getProperty("java.io.tmpdir")</code>.
     19  * 
     20  * After downloading it makes the binary executable.
     21  * The location of the downloaded binary is returned by <code>ffmpegBinary();</code>
     22  * 
     23  * @author Joren Six
     24  */
     25 public class FFMPEGDownloader {
     26 	
     27 	private static String url = "https://0110.be/releases/TarsosDSP/TarsosDSP-static-ffmpeg/";
     28 	
     29 	private final String ffmpegBinary;
     30 	
     31 	private final static Logger LOG = Logger.getLogger(FFMPEGDownloader.class.getName());
     32 	
     33 	public FFMPEGDownloader(){
     34 		String filename = operatingSystemName() + "_" + processorArchitecture() + "_ffmpeg" + suffix();
     35 		url = url + filename;
     36 	
     37 		String tempDirectory = System.getProperty("java.io.tmpdir");
     38 		String saveTo = new File(tempDirectory,filename).getAbsolutePath();
     39 		
     40 		if(new File(saveTo).exists()){
     41 			LOG.info("Found an already download ffmpeg static binary: " + saveTo);
     42 			ffmpegBinary = saveTo;
     43 		}else{
     44 			LOG.info("Started downloading an ffmpeg static binary from  " + url);
     45 			downloadExecutable(saveTo);
     46 			
     47 			if(new File(saveTo).exists()){
     48 				LOG.info("Downloaded an ffmpeg static binary. Stored at: " + saveTo);
     49 				//make it executable
     50 				new File(saveTo).setExecutable(true);
     51 				ffmpegBinary = saveTo;
     52 			}else{
     53 				//Unable to download or unknown architecture
     54 				LOG.warning("Unable to find or download an ffmpeg static binary.  " + filename);
     55 				ffmpegBinary = null;
     56 			}
     57 		}	
     58 	}
     59 	
     60 	public String ffmpegBinary(){
     61 		if(ffmpegBinary!=null){
     62 			return ffmpegBinary.replace(suffix(), "");
     63 		}
     64 		return null;
     65 	} 
     66 	
     67 	private void downloadExecutable(String saveTo){
     68 		try{
     69 			URL website = new URL(url);
     70 			ReadableByteChannel rbc = Channels.newChannel(website.openStream());
     71 			FileOutputStream fos = new FileOutputStream(saveTo);
     72 			fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
     73 			fos.close();
     74 		}catch(MalformedURLException e){
     75 			e.printStackTrace();
     76 		} catch (IOException e) {
     77 			
     78 			e.printStackTrace();
     79 		}
     80 	}
     81 	
     82 	private String operatingSystemName(){
     83 		String name;
     84 		String operatingSystem = System.getProperty("os.name").toLowerCase();
     85 		if(operatingSystem.indexOf("indows") > 0 ){
     86 			name = "windows";
     87 		}else if(operatingSystem.indexOf("nux") >= 0){
     88 			name="linux";
     89 		}else if(operatingSystem.indexOf("mac") >= 0){
     90 			name="mac_os_x";
     91 		}else{
     92 			name = null;
     93 		}
     94 		return name;
     95 	}
     96 	
     97 	private String processorArchitecture(){
     98 		boolean is64bit = false;
     99 		if (System.getProperty("os.name").contains("Windows")) {
    100 		    is64bit = (System.getenv("ProgramFiles(x86)") != null);
    101 		} else {
    102 		    is64bit = (System.getProperty("os.arch").indexOf("64") != -1);
    103 		}
    104 		if(is64bit){
    105 			return "64_bits";
    106 		}else{
    107 			return "32_bits";
    108 		}
    109 	}
    110 	
    111 	private String suffix(){
    112 		String suffix = "";
    113 		if (System.getProperty("os.name").contains("Windows")) {
    114 		    suffix = ".exe";
    115 		}
    116 		return suffix;
    117 	}
    118 	
    119 	public static void main(String...strings){
    120 		new FFMPEGDownloader();
    121 	}
    122 }