| 1 | package org.farng.mp3.id3; |
| 2 | |
| 3 | /** |
| 4 | * <h3>4.6. MPEG location lookup table</h3> |
| 5 | * <p/> |
| 6 | * <p> To increase performance and accuracy of jumps within a MPEG [MPEG]<br> |
| 7 | * <p/> |
| 8 | * audio file, frames with time codes in different locations in the file<br> might be useful. |
| 9 | * This ID3v2 frame includes references that the<br> software can use to calculate positions in the file. |
| 10 | * After the frame<br> header follows a descriptor of how much the 'frame counter' should be<br> |
| 11 | * increased for every reference. If this value is two then the first<br> |
| 12 | * <p/> |
| 13 | * reference points out the second frame, the 2nd reference the 4th<br> frame, the 3rd |
| 14 | * reference the 6th frame etc. In a similar way the<br> 'bytes between reference' and 'milliseconds |
| 15 | * between reference' points<br> out bytes and milliseconds respectively.</p> |
| 16 | * <p/> |
| 17 | * <p> Each reference consists of two parts; a certain number of bits, as<br> defined in 'bits |
| 18 | * for bytes deviation', that describes the difference<br> between what is said in 'bytes between |
| 19 | * reference' and the reality and<br> a certain number of bits, as defined in 'bits for milliseconds<br> |
| 20 | * deviation', that describes the difference between what is said in<br> |
| 21 | * <p/> |
| 22 | * 'milliseconds between reference' and the reality. The number of bits<br> in every |
| 23 | * reference, i.e. 'bits for bytes deviation'+'bits for<br> milliseconds deviation', must be a multiple of |
| 24 | * four. There may only<br> be one "MLLT" frame in each tag.</p> |
| 25 | * <p/> |
| 26 | * <p> <Header for 'Location lookup table', ID: "MLLT"><br> |
| 27 | * MPEG frames between reference $xx xx<br> Bytes between |
| 28 | * reference $xx xx xx<br> |
| 29 | * <p/> |
| 30 | * Milliseconds between reference $xx xx xx<br> Bits for bytes |
| 31 | * deviation $xx<br> Bits for milliseconds |
| 32 | * dev. $xx</p> |
| 33 | * <p/> |
| 34 | * <p> Then for every reference the following data is included;</p> |
| 35 | * <p/> |
| 36 | * <p> Deviation in bytes %xxx....<br> |
| 37 | * Deviation in milliseconds %xxx....<br> </p> |
| 38 | * |
| 39 | * @author Eric Farng |
| 40 | * @version $Revision: 1.3 $ |
| 41 | */ |
| 42 | public class FrameBodyMLLT extends AbstractID3v2FrameBody { |
| 43 | |
| 44 | /** |
| 45 | * Creates a new FrameBodyMLLT object. |
| 46 | */ |
| 47 | public FrameBodyMLLT() { |
| 48 | super(); |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Creates a new FrameBodyMLLT object. |
| 53 | */ |
| 54 | public FrameBodyMLLT(final FrameBodyMLLT body) { |
| 55 | super(body); |
| 56 | } |
| 57 | |
| 58 | protected void setupObjectList() { |
| 59 | throw new UnsupportedOperationException("This frame has not been implemented."); |
| 60 | } |
| 61 | |
| 62 | public String getIdentifier() { |
| 63 | throw new UnsupportedOperationException("This frame has not been implemented."); |
| 64 | } |
| 65 | } |