Examples of org.farng.mp3.id3.FrameBodyASPI

org.farng.mp3.id3.FrameBodyTRCK

4.30.   Audio seek point index

   Audio files with variable bit rates are intrinsically difficult to
   deal with in the case of seeking within the file. The ASPI frame
   makes seeking easier by providing a list a seek points within the
   audio file. The seek points are a fractional offset within the audio
   data, providing a starting point from which to find an appropriate

   point to start decoding. The presence of an ASPI frame requires the
   existence of a TLEN frame, indicating the duration of the file in
   milliseconds. There may only be one 'audio seek point index' frame in
   a tag.

     <Header for 'Seek Point Index', ID: "ASPI">
     Indexed data start (S)         $xx xx xx xx
     Indexed data length (L)        $xx xx xx xx
     Number of index points (N)     $xx xx

     Bits per index point (b)       $xx

   Then for every index point the following data is included;

     Fraction at index (Fi)          $xx (xx)

   'Indexed data start' is a byte offset from the beginning of the file.
   'Indexed data length' is the byte length of the audio data being
   indexed. 'Number of index points' is the number of index points, as
   the name implies. The recommended number is 100. 'Bits per index
   point' is 8 or 16, depending on the chosen precision. 8 bits works

   well for short files (less than 5 minutes of audio), while 16 bits is
   advantageous for long files. 'Fraction at index' is the numerator of
   the fraction representing a relative position in the data. The
   denominator is 2 to the power of b.

   Here are the algorithms to be used in the calculation. The known data
   must be the offset of the start of the indexed data (S), the offset
   of the end of the indexed data (E), the number of index points (N),
   the offset at index i (Oi). We calculate the fraction at index i
   (Fi).

   Oi is the offset of the frame whose start is soonest after the point
   for which the time offset is (i/N * duration).

   The frame data should be calculated as follows:

     Fi = Oi/L * 2^b    (rounded down to the nearest integer)

   Offset calculation should be calculated as follows from data in the
   frame:

     Oi = (Fi/2^b)*L    (rounded up to the nearest integer)

@author Eric Farng @version $Revision: 1.5 $

    }


    public void setSongTitle(String songTitle) {
        AbstractID3v2Frame field = getFrame("TIT2");
        if (field == null) {
            field = new ID3v2_3Frame(new FrameBodyTIT2((byte) 0, songTitle.trim()));
            setFrame(field);
        } else {
            ((FrameBodyTIT2) field.getBody()).setText(songTitle.trim());
        }
    }

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                         this.testMusicArray[i].getMp3StartByte());
        }
        MP3File mp3file = new MP3File(new File(this.testMusicDirectory, this.testMusic[1]));
        ID3v2_4 tag = new ID3v2_4();
        ID3v2_4Frame frame = new ID3v2_4Frame();
        FrameBodyTPE1 body = new FrameBodyTPE1((byte) 0, "text");


        //        // save and re-read this to set file/tag alter preservation tags to
        // correct
        //        // values;
        //        mp3file.save();

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        mp3file = new MP3File();
        id3v1 = new ID3v1_1();
        id3v2 = new ID3v2_4();
        lyrics3 = new Lyrics3v2();
        filename = FilenameTagBuilder.createEmptyFilenameTag();
        frame = new ID3v2_4Frame(new FrameBodyTPE1((byte) 0, testString));
        id3v1.setArtist(testString);
        id3v2.setFrame(frame);
        try {
            ((Lyrics3v2) lyrics3).setField(new Lyrics3v2Field(frame));
        } catch (TagException ex) {

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        assertEquals(1, mp3.getUnsynchronizedFragments().size());


        // test two differences
        id3v1.setArtist("<song artist>");
        assertEquals(1, mp3.getUnsynchronizedFragments().size());
        body = new FrameBodyTPE1((byte) 0, "different");
        frame = new ID3v2_4Frame();
        frame.setBody(body);
        filename.setFrame(frame);
        assertEquals(2, mp3.getUnsynchronizedFragments().size());
        body = new FrameBodyTPE1((byte) 0, "<song artist>");
        frame = new ID3v2_4Frame();
        frame.setBody(body);
        filename.setFrame(frame);
        assertEquals(1, mp3.getUnsynchronizedFragments().size());
        lyrics3.setField(new Lyrics3v2Field(new FieldBodyEAR("different")));
        assertEquals(2, mp3.getUnsynchronizedFragments().size());
        lyrics3.setField(new Lyrics3v2Field(new FieldBodyEAR("<song artist>")));
        assertEquals(1, mp3.getUnsynchronizedFragments().size());
        body = new FrameBodyTPE1((byte) 0, "different");
        frame = new ID3v2_4Frame(body);
        id3v2.setFrame(frame);
        assertEquals(2, mp3.getUnsynchronizedFragments().size());
        body = new FrameBodyTPE1((byte) 0, "<song artist>");
        frame = new ID3v2_4Frame(body);
        id3v2.setFrame(frame);
        assertEquals(1, mp3.getUnsynchronizedFragments().size());
        mp3.getMp3file().delete();
    }

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        ((FrameBodyTIT2) mp3file.getFilenameTag().getFrame("TIT2").getBody()).getText().equals(testString);
        mp3file.setID3v1Tag(new ID3v1_1());
        mp3file.setID3v2Tag(new ID3v2_4());
        mp3file.setLyrics3Tag(new Lyrics3v2());
        mp3file.setFilenameTag(FilenameTagBuilder.createEmptyFilenameTag());
        frameBody = new FrameBodyTPE1();
        ((FrameBodyTPE1) frameBody).setText(testString);
        frame.setBody(frameBody);
        mp3file.setFrameAcrossTags(frame);
        mp3file.getID3v1Tag().getArtist().equals(testString);
        ((FrameBodyTPE1) mp3file.getID3v2Tag().getFrame("TPE1").getBody()).getText().equals(testString);

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    public String getLeadArtist() {
        String text = null;
        AbstractID3v2Frame frame = getFrame("TPE1");
        if (frame != null) {
            FrameBodyTPE1 body = (FrameBodyTPE1) frame.getBody();
            text = body.getText();
        }
        return text.trim();
    }

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    }


    public void setLeadArtist(String leadArtist) {
        AbstractID3v2Frame field = getFrame("TPE1");
        if (field == null) {
            field = new ID3v2_3Frame(new FrameBodyTPE1((byte) 0, leadArtist.trim()));
            setFrame(field);
        } else {
            ((FrameBodyTPE1) field.getBody()).setText(leadArtist.trim());
        }
    }

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        mp3file = new MP3File();
        id3v1 = new ID3v1_1();
        id3v2 = new ID3v2_4();
        lyrics3 = new Lyrics3v2();
        filename = FilenameTagBuilder.createEmptyFilenameTag();
        frame = new ID3v2_4Frame(new FrameBodyTRCK((byte) 0, "42"));
        ((ID3v1_1) id3v1).setTrack((byte) 42);
        id3v2.setFrame(frame);
        try {
            ((Lyrics3v2) lyrics3).setField(new Lyrics3v2Field(frame));
            fail("Somehow created a TRCK (track) Lyrics3v2 Field");

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        ((FrameBodyTCON) mp3file.getFilenameTag().getFrame("TCON").getBody()).getText().equals("42");
        mp3file.setID3v1Tag(new ID3v1_1());
        mp3file.setID3v2Tag(new ID3v2_4());
        mp3file.setLyrics3Tag(new Lyrics3v2());
        mp3file.setFilenameTag(FilenameTagBuilder.createEmptyFilenameTag());
        frameBody = new FrameBodyTRCK();
        ((FrameBodyTRCK) frameBody).setText("42");
        frame.setBody(frameBody);
        mp3file.setFrameAcrossTags(frame);
        assertEquals(42, ((ID3v1_1) mp3file.getID3v1Tag()).getTrack());
        ((FrameBodyTRCK) mp3file.getID3v2Tag().getFrame("TRCK").getBody()).getText().equals("42");

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    public String getTrackNumberOnAlbum() {
        String text = null;
        AbstractID3v2Frame frame = getFrame("TRCK");
        if (frame != null) {
            FrameBodyTRCK body = (FrameBodyTRCK) frame.getBody();
            text = body.getText();
        }
        return text.trim();
    }

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Examples of org.farng.mp3.id3.FrameBodyASPI

4.30. Audio seek point index

Related Classes of org.farng.mp3.id3.FrameBodyASPI