/**
* @param header parentHeader info
* @param dataBuffer data of box (doesnt include parentHeader data)
*/
public Mp4NameBox(Mp4BoxHeader header, ByteBuffer dataBuffer) {
this.header = header;
// Double check
if (!header.getId().equals(IDENTIFIER)) {
throw new RuntimeException(
"Unable to process name box because identifier is:" + header.getId());
}
// Make slice so operations here don't effect position of main buffer
this.dataBuffer = dataBuffer.slice();
// issuer
this.name =
Utils.getString(
this.dataBuffer,
PRE_DATA_LENGTH,
header.getDataLength() - PRE_DATA_LENGTH,
header.getEncoding());
}
/**
* @param header parentHeader info
* @param dataBuffer data of box (doesnt include parentHeader data)
*/
public Mp4DataBox(Mp4BoxHeader header, ByteBuffer dataBuffer) {
this.header = header;
// Double check
if (!header.getId().equals(IDENTIFIER)) {
throw new RuntimeException(
"Unable to process data box because identifier is:" + header.getId());
}
// Make slice so operations here don't effect position of main buffer
this.dataBuffer = dataBuffer.slice();
// Type
type =
Utils.getIntBE(
this.dataBuffer, Mp4DataBox.TYPE_POS, Mp4DataBox.TYPE_POS + Mp4DataBox.TYPE_LENGTH - 1);
if (type == Mp4FieldType.TEXT.getFileClassId()) {
content =
Utils.getString(
this.dataBuffer,
PRE_DATA_LENGTH,
header.getDataLength() - PRE_DATA_LENGTH,
header.getEncoding());
} else if (type == Mp4FieldType.NUMERIC.getFileClassId()) {
numbers = new ArrayList<Short>();
for (int i = 0; i < ((header.getDataLength() - PRE_DATA_LENGTH) / NUMBER_LENGTH); i++) {
short number =
Utils.getShortBE(
this.dataBuffer,
PRE_DATA_LENGTH + (i * NUMBER_LENGTH),
PRE_DATA_LENGTH + (i * NUMBER_LENGTH) + (NUMBER_LENGTH - 1));
numbers.add(number);
}
// Make String representation (separate values with slash)
StringBuffer sb = new StringBuffer();
ListIterator<Short> iterator = numbers.listIterator();
while (iterator.hasNext()) {
sb.append(iterator.next());
if (iterator.hasNext()) {
sb.append("/");
}
}
content = sb.toString();
} else if (type == Mp4FieldType.BYTE.getFileClassId()) {
// TODO byte data length seems to be 1 for pgap and cpil but 2 for tmpo ?
// Create String representation for display
content = Utils.getIntBE(this.dataBuffer, PRE_DATA_LENGTH, header.getDataLength() - 1) + "";
// But store data for safer writng back to file
bytedata = new byte[header.getDataLength() - PRE_DATA_LENGTH];
int pos = dataBuffer.position();
dataBuffer.position(pos + PRE_DATA_LENGTH);
dataBuffer.get(bytedata);
dataBuffer.position(pos);
} else if (type == Mp4FieldType.COVERART_JPEG.getFileClassId()) {
content =
Utils.getString(
this.dataBuffer,
PRE_DATA_LENGTH,
header.getDataLength() - PRE_DATA_LENGTH,
header.getEncoding());
}
}
