Field Detail

• GIF_87A_VERSION_IDENTIFIER

  private static final java.lang.String GIF_87A_VERSION_IDENTIFIER

  See Also:

  Constant Field Values

• GIF_89A_VERSION_IDENTIFIER

  private static final java.lang.String GIF_89A_VERSION_IDENTIFIER

  See Also:

  Constant Field Values

Constructor Detail

• GifReader

  public GifReader()

Method Detail

• extract

  public void extract​(MetadataExtractor.SequentialReader reader,
                      MetadataExtractor.Metadata metadata)

• readGifHeader

  private MetadataExtractor.GifHeaderDirectory readGifHeader​(MetadataExtractor.SequentialReader reader)
                                                      throws java.io.IOException

  Throws:

  java.io.IOException

• readGifExtensionBlock

  private void readGifExtensionBlock​(MetadataExtractor.SequentialReader reader,
                                     MetadataExtractor.Metadata metadata)
                              throws java.io.IOException

  Throws:

  java.io.IOException

• readPlainTextBlock

  private MetadataExtractor.Directory readPlainTextBlock​(MetadataExtractor.SequentialReader reader,
                                                         int blockSizeBytes)
                                                  throws java.io.IOException

  Throws:

  java.io.IOException

• readCommentBlock

  private MetadataExtractor.GifCommentDirectory readCommentBlock​(MetadataExtractor.SequentialReader reader,
                                                                 int blockSizeBytes)
                                                          throws java.io.IOException

  Throws:

  java.io.IOException

• readApplicationExtensionBlock

  private void readApplicationExtensionBlock​(MetadataExtractor.SequentialReader reader,
                                             int blockSizeBytes,
                                             MetadataExtractor.Metadata metadata)
                                      throws java.io.IOException

  Throws:

  java.io.IOException

• readControlBlock

  private MetadataExtractor.GifControlDirectory readControlBlock​(MetadataExtractor.SequentialReader reader)
                                                          throws java.io.IOException

  Throws:

  java.io.IOException

• readImageBlock

  private MetadataExtractor.GifImageDirectory readImageBlock​(MetadataExtractor.SequentialReader reader)
                                                      throws java.io.IOException

  Throws:

  java.io.IOException

• gatherBytes

  private byte[] gatherBytes​(MetadataExtractor.SequentialReader reader)
                      throws java.io.IOException

  Throws:

  java.io.IOException

• gatherBytes

  private byte[] gatherBytes​(MetadataExtractor.SequentialReader reader,
                             int firstLength)
                      throws java.io.IOException

  Throws:

  java.io.IOException

• skipBlocks

  private void skipBlocks​(MetadataExtractor.SequentialReader reader)
                   throws java.io.IOException

  Throws:

  java.io.IOException