Android Open Source - FPlayAndroid Song

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The source code is released under:
Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the followin...
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Java Source Code

//
// FPlayAndroid is distributed under the FreeBSD License
////from   w  ww .j  a  v a2 s .  co m
// Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.
//
// https://github.com/carlosrafaelgn/FPlayAndroid
//
package br.com.carlosrafaelgn.fplay.list;

import android.media.MediaMetadataRetriever;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import br.com.carlosrafaelgn.fplay.playback.MetadataExtractor;
import br.com.carlosrafaelgn.fplay.util.Serializer;

public final class Song extends BaseItem {
  public static final int EXTRA_ARTIST = 0;
  public static final int EXTRA_ALBUM = 1;
  public static final int EXTRA_TRACK_ARTIST = 2;
  public static final int EXTRA_TRACK_ALBUM = 3;
  public static final int EXTRA_TRACK_ARTIST_ALBUM = 4;
  public static final int EXTRA_ARTIST_ALBUM = 5;
  public static int extraInfoMode;
  public final String path;
  public final boolean isHttp;
  public String title, artist, album, extraInfo;
  public int track, lengthMS, year;
  public String length;
  public Song possibleNextSong;
  public boolean alreadyPlayed, selected;
  
  private Song(String path, String title, String artist, String album, int track, int lengthMS, int year) {
    this.path = path;
    this.isHttp = (path.startsWith("http://") || path.startsWith("https://"));
    this.title = title;
    this.artist = artist;
    this.album = album;
    this.track = track;
    this.lengthMS = lengthMS;
    this.year = year;
    validateFields(null);
  }
  
  public Song(String url, String title) {
    this.path = url.trim();
    this.isHttp = true;
    this.title = title.trim();
    validateFields(null);
  }
  
  public Song(FileSt fileSt, byte[][] tmpPtr) {
    this.path = fileSt.path;
    this.isHttp = false;
    
    //MediaMetadataRetriever simply returns null for all keys, except METADATA_KEY_DURATION,
    //on several devices, even though the file has the metadata... :(
    //So, trust our MetadataExtractor, and only call MediaMetadataRetriever for unsupported file types
    
    final String[] fields = MetadataExtractor.extract(fileSt, tmpPtr);
    
    if (fields != null) {
      this.title = fields[MetadataExtractor.TITLE];
      this.artist = fields[MetadataExtractor.ARTIST];
      this.album = fields[MetadataExtractor.ALBUM];
      if (fields[MetadataExtractor.TRACK] != null) {
        try {
          this.track = Integer.parseInt(fields[MetadataExtractor.TRACK]);
        } catch (Throwable ex) { }
      }
      if (fields[MetadataExtractor.YEAR] != null) {
        try {
          this.year = Integer.parseInt(fields[MetadataExtractor.YEAR]);
        } catch (Throwable ex) { }
      }
      if (fields[MetadataExtractor.LENGTH] != null) {
        try {
          this.lengthMS = Integer.parseInt(fields[MetadataExtractor.LENGTH]);
        } catch (Throwable ex) { }
      }
    }
    if (fields == null || this.lengthMS <= 0) {
      final MediaMetadataRetriever retr = new MediaMetadataRetriever();
      try {
        retr.setDataSource(fileSt.path);
        String s;
        if (fields == null) {
          try {
            this.title = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_TITLE);
          } catch (Throwable ex) { }
          try {
            this.artist = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ARTIST);
          } catch (Throwable ex) { }
          try {
            this.album = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_ALBUM);
          } catch (Throwable ex) { }
          try {
            s = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_CD_TRACK_NUMBER);
            if (s != null && s.length() > 0)
              this.track = Integer.parseInt(s);
          } catch (Throwable ex) { }
          try {
            s = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_YEAR);
            if (s != null && s.length() > 0)
              this.year = Integer.parseInt(s);
          } catch (Throwable ex) { }
        }
        try {
          s = retr.extractMetadata(MediaMetadataRetriever.METADATA_KEY_DURATION);
          if (s != null && s.length() > 0)
            this.lengthMS = Integer.parseInt(s);
        } catch (Throwable ex) { }
      } catch (Throwable ex) { }
      retr.release();
    }
    validateFields(fileSt.name);
  }
  
  private void validateFields(String fileName) {
    if (title == null || title.length() == 0) {
      if (fileName != null) {
        final int i = fileName.lastIndexOf('.');
        title = ((i > 0) ? fileName.substring(0, i) : fileName);
      }
    }
    if (title == null) {
      title = "-";
    } else {
      if (fileName != null)
        title = title.trim();
      if (title.length() == 0)
        title = "-";
    }
    if (artist == null) {
      artist = "-";
    } else {
      if (fileName != null)
        artist = artist.trim();
      if (artist.length() == 0)
        artist = "-";
    }
    if (album == null) {
      album = "-";
    } else {
      if (fileName != null)
        album = album.trim();
      if (album.length() == 0)
        album = "-";
    }
    updateExtraInfo();
    if (track <= 0)
      track = -1;
    if (lengthMS <= 0)
      lengthMS = -1;
    if (year <= 0)
      year = -1;
    if (isHttp)
      length = "";
    else
      length = formatTime(lengthMS);
  }
  
  @Override
  public String toString() {
    return title;
  }
  
  public void updateExtraInfo() {
    if (isHttp) {
      extraInfo = "";
    } else {
      switch (extraInfoMode) {
      case EXTRA_ARTIST:
        extraInfo = artist;
        break;
      case EXTRA_ALBUM:
        extraInfo = album;
        break;
      case EXTRA_TRACK_ARTIST:
        extraInfo = ((track > 0) ? (track + " / " + artist) : artist);
        break;
      case EXTRA_TRACK_ALBUM:
        extraInfo = ((track > 0) ? (track + " / " + album) : album);
        break;
      case EXTRA_TRACK_ARTIST_ALBUM:
        extraInfo = ((track > 0) ? (track + " / " + artist + " / " + album) : (artist + " / " + album));
        break;
      default:
        extraInfo = artist + " / " + album;
        break;
      }
    }
  }
  
  public void serialize(OutputStream os) throws IOException {
    //NEVER change this order! (changing will destroy existing lists)
    Serializer.serializeString(os, path);
    Serializer.serializeString(os, title);
    Serializer.serializeString(os, artist);
    Serializer.serializeString(os, album);
    Serializer.serializeInt(os, track);
    Serializer.serializeInt(os, lengthMS);
    Serializer.serializeInt(os, year);
    Serializer.serializeInt(os, 0); //flags
  }
  
  public static Song deserialize(InputStream is) throws IOException {
    String path, title, artist, album;
    int track, lengthMS, year;
    //NEVER change this order! (changing will destroy existing lists)
    path = Serializer.deserializeString(is);
    title = Serializer.deserializeString(is);
    artist = Serializer.deserializeString(is);
    album = Serializer.deserializeString(is);
    track = Serializer.deserializeInt(is);
    lengthMS = Serializer.deserializeInt(is);
    year = Serializer.deserializeInt(is);
    Serializer.deserializeInt(is); //flags
    return new Song(path, title, artist, album, track, lengthMS, year);
  }
  
  public static String formatTime(int timeMS) {
    final StringBuilder sb = new StringBuilder(8);
    formatTime(timeMS, sb);
    return sb.toString();
  }
  
  public static void formatTime(int timeMS, StringBuilder buf) {
    buf.delete(0, buf.length());
    if (timeMS < 0) {
      buf.append('-');
      return;
    }
    int timeS = timeMS / 1000;
    buf.append(timeS / 60);
    buf.append('\'');
    timeS %= 60;
    if (timeS < 10) buf.append('0');
    buf.append(timeS);
    buf.append('\"');
  }
  
  public static void formatTimeSec(int timeS, StringBuilder buf) {
    buf.delete(0, buf.length());
    if (timeS < 0) {
      buf.append('-');
      return;
    }
    buf.append(timeS / 60);
    buf.append('\'');
    timeS %= 60;
    if (timeS < 10) buf.append('0');
    buf.append(timeS);
    buf.append('\"');
  }
}
Java Source Code List
