/**
* if the ID3v2.4 tag header's values have been modified, then resize the raw binary buffer and
* store the new values there. When finished, reset the dirty flag to indicate that the buffer is
* up to date, and the tag header is now ready to be saved to the .mp3 file.
*/
public void setBuffer() {
System.arraycopy(version.getIdBytes(), 0, header, 0, ID3TagVersion.NUM_ID_BYTES);
header[5] =
(byte)
(unsynchronization
? header[5] | TAG_HEADER_UNSYNCHRONIZATION_MASK
: header[5] & ~TAG_HEADER_UNSYNCHRONIZATION_MASK);
header[5] =
(byte)
(extendedHeaderPresent
? header[5] | TAG_HEADER_EXTENDED_HEADER_PRESENT_MASK
: header[5] & ~TAG_HEADER_EXTENDED_HEADER_PRESENT_MASK);
header[5] =
(byte)
(experimentalIndicator
? header[5] | TAG_HEADER_EXPERIMENTAL_INDICATOR_MASK
: header[5] & ~TAG_HEADER_EXPERIMENTAL_INDICATOR_MASK);
header[5] =
(byte)
(footerPresent
? header[5] | TAG_HEADER_FOOTER_PRESENT_MASK
: header[5] & ~TAG_HEADER_FOOTER_PRESENT_MASK);
System.arraycopy(ID3v24FrameBodyUtility.synchsafeIntToBytes(tagSize), 0, header, 6, 4);
dirty = false;
}
/**
* The default constructor is called when creating a new ID3v2.4 tag header. The default values
* used are:
*
* <ul>
* <li>tag size is 0 bytes
* <li>unsynchronization
* <li>no extended header present
* <li>experimental indicator is false
* <li>no footer present
* </ul>
*/
public ID3v24TagHeader() {
header = new byte[TAG_HEADER_SIZE];
version = ID3TagVersion.ID3V2_4;
tagSize = 0;
unsynchronization = true;
extendedHeaderPresent = false;
experimentalIndicator = false;
footerPresent = false;
dirty =
true; // the tag header has been created, but the values have not yet been written to the
// raw binary buffer
System.arraycopy(version.getIdBytes(), 0, header, 0, ID3TagVersion.NUM_ID_BYTES);
}