Java File Object Create toFile(String line)

Description

to File

License

Apache License

Declaration

public static String toFile(String line)
            throws LineUnavailableException, InterruptedException,
            IOException, UnsupportedAudioFileException 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import javax.sound.sampled.*;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;

public class Main {
    public static final int DOT = 200, DASH = DOT * 3, FREQ = 500;
    static Map<String, String> morseAlphabet = new HashMap<String, String>();

    public static String toFile(String line)
            throws LineUnavailableException, InterruptedException,
            IOException, UnsupportedAudioFileException {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        StringBuilder sb = new StringBuilder();
        for (char c : line.toLowerCase().toCharArray()) {
            String s = String.valueOf(c);
            if (" ".equals(s)) {
                sb.append("/");
                sleep(bos, 7 * 8);//from w w w .  ja v a  2s .  c om
            } else if (morseAlphabet.containsKey(s)) {
                for (char note : morseAlphabet.get(s).toCharArray()) {
                    sb.append(note);

                    for (int i = 0; i < (note == '.' ? DOT : DASH) * 8; i++) {
                        bos.write(
                                new byte[] { (byte) (Math.sin(i
                                        / (16000F / FREQ) * 2.0 * Math.PI) * 127.0) },
                                0, 1);
                    }
                    sleep(bos, 1 * 8);
                }
            }
            sleep(bos, 3 * 8);
            sb.append(" ");
        }
        byte[] b = bos.toByteArray();
        bos.close();
        ByteArrayInputStream bis = new ByteArrayInputStream(b);
        AudioInputStream ais2 = new AudioInputStream(bis, getAudioFormat(),
                b.length);
        File fileOut = new File(DOT + "/" + line + "-" + DOT + ".wav");
        AudioFileFormat.Type fileType = AudioFileFormat.Type.WAVE;
        AudioSystem.write(ais2, fileType, fileOut);
        System.out.println(fileOut.getAbsolutePath());
        ffmpeg(line);
        bis.close();
        ais2.close();
        return sb.toString();
    }

    private static void sleep(SourceDataLine sdl, Integer factor) {
        for (int i = 0; i < (DOT * factor); i++) {
            sdl.write(new byte[] { (byte) (0) }, 0, 1);
        }
    }

    private static void sleep(ByteArrayOutputStream bos, Integer factor) {
        for (int i = 0; i < (DOT * factor); i++) {
            bos.write(new byte[] { (byte) (0) }, 0, 1);
        }
    }

    /**
     * Defines an audio format
     */
    static AudioFormat getAudioFormat() {
        return new AudioFormat(16000F, 8, 1, true, false);
    }

    private static void ffmpeg(String filename) {
        String cmd = "ffmpeg -y -i morse/"
                + DOT
                + "/"
                + filename
                + "-"
                + DOT
                + ".wav -ar 16000 -ab 48k -codec:a libmp3lame -ac 1  morse/"
                + DOT + "/mp3/" + filename + ".mp3";
        try {
            Runtime.getRuntime().exec(cmd);
        } catch (Exception e) {
            e.printStackTrace(System.err);
        }
    }
}

Related

1. toFile(String fileName)
2. toFile(String fileName, String content)
3. toFile(String fileName, String cwd)
4. toFile(String fileName, String txt)
5. toFile(String inFile)
6. toFile(String path)
7. toFile(String path)
8. toFile(String path)
9. toFile(String path)