private void createMp4Field(Mp4Tag tag, Mp4BoxHeader header, ByteBuffer raw) throws UnsupportedEncodingException {
//Reverse Dns Atom
if (header.getId().equals(Mp4TagReverseDnsField.IDENTIFIER)) {
//
try {
TagField field = new Mp4TagReverseDnsField(header, raw);
tag.addField(field);
} catch (Exception e) {
//logger.warning(ErrorMessage.MP4_UNABLE_READ_REVERSE_DNS_FIELD.getMsg(e.getMessage()));
TagField field = new Mp4TagRawBinaryField(header, raw);
tag.addField(field);
}
}
//Normal Parent with Data atom
else {
int currentPos = raw.position();
boolean isDataIdentifier = Utils.getString(raw, Mp4BoxHeader.IDENTIFIER_POS, Mp4BoxHeader.IDENTIFIER_LENGTH, "ISO-8859-1").equals(Mp4DataBox.IDENTIFIER);
raw.position(currentPos);
if (isDataIdentifier) {
//Need this to decide what type of Field to create
int type = Utils.getIntBE(raw, Mp4DataBox.TYPE_POS_INCLUDING_HEADER, Mp4DataBox.TYPE_POS_INCLUDING_HEADER + Mp4DataBox.TYPE_LENGTH - 1);
Mp4FieldType fieldType = Mp4FieldType.getFieldType(type);
//logger.info("Box Type id:" + header.getId() + ":type:" + fieldType);
//Special handling for some specific identifiers otherwise just base on class id
if (header.getId().equals(Mp4FieldKey.TRACK.getFieldName())) {
TagField field = new Mp4TrackField(header.getId(), raw);
tag.addField(field);
} else if (header.getId().equals(Mp4FieldKey.DISCNUMBER.getFieldName())) {
TagField field = new Mp4DiscNoField(header.getId(), raw);
tag.addField(field);
} else if (header.getId().equals(Mp4FieldKey.GENRE.getFieldName())) {
TagField field = new Mp4GenreField(header.getId(), raw);
tag.addField(field);
} else if (header.getId().equals(Mp4FieldKey.ARTWORK.getFieldName()) || Mp4FieldType.isCoverArtType(fieldType)) {
int processedDataSize = 0;
int imageCount = 0;
//The loop should run for each image (each data atom)
while (processedDataSize < header.getDataLength()) {
//There maybe a mixture of PNG and JPEG images so have to check type
//for each subimage (if there are more than one image)
if (imageCount > 0) {
type = Utils.getIntBE(raw, processedDataSize + Mp4DataBox.TYPE_POS_INCLUDING_HEADER,
processedDataSize + Mp4DataBox.TYPE_POS_INCLUDING_HEADER + Mp4DataBox.TYPE_LENGTH - 1);
fieldType = Mp4FieldType.getFieldType(type);
}
Mp4TagCoverField field = new Mp4TagCoverField(raw, fieldType);
tag.addField(field);
processedDataSize += field.getDataAndHeaderSize();
imageCount++;
}
} else if (fieldType == Mp4FieldType.TEXT) {
TagField field = new Mp4TagTextField(header.getId(), raw);
tag.addField(field);
} else if (fieldType == Mp4FieldType.IMPLICIT) {
TagField field = new Mp4TagTextNumberField(header.getId(), raw);
tag.addField(field);
} else if (fieldType == Mp4FieldType.INTEGER) {
TagField field = new Mp4TagByteField(header.getId(), raw);
tag.addField(field);
} else {
boolean existingId = false;
for (Mp4FieldKey key : Mp4FieldKey.values()) {
if (key.getFieldName().equals(header.getId())) {
//The parentHeader is a known id but its field type is not one of the expected types so
//this field is invalid. i.e I received a file with the TMPO set to 15 (Oxf) when it should
//be 21 (ox15) so looks like somebody got their decimal and hex numbering confused
//So in this case best to ignore this field and just write a warning
existingId = true;
//logger.warning("Known Field:" + header.getId() + " with invalid field type of:" + type + " is ignored");
break;
}
}
//Unknown field id with unknown type so just create as binary
if (!existingId) {
//logger.warning("UnKnown Field:" + header.getId() + " with invalid field type of:" + type + " created as binary");
TagField field = new Mp4TagBinaryField(header.getId(), raw);
tag.addField(field);
}
}
}
//Special Cases
else {
//MediaMonkey 3 CoverArt Attributes field, does not have data items so just
//copy parent and child as is without modification
if (header.getId().equals(Mp4NonStandardFieldKey.AAPR.getFieldName())) {
TagField field = new Mp4TagRawBinaryField(header, raw);
tag.addField(field);
}
//Default case
else {
TagField field = new Mp4TagRawBinaryField(header, raw);
tag.addField(field);
}
}
}