/**
* Read v1 tag
*
* @param file
* @param newFile
* @param loadOptions
* @throws IOException
*/
private void readV1Tag(File file, RandomAccessFile newFile, int loadOptions) throws IOException {
if ((loadOptions & LOAD_IDV1TAG) != 0) {
logger.finer("Attempting to read id3v1tags");
try {
id3v1tag = new ID3v11Tag(newFile, file.getName());
} catch (TagNotFoundException ex) {
logger.config("No ids3v11 tag found");
}
try {
if (id3v1tag == null) {
id3v1tag = new ID3v1Tag(newFile, file.getName());
}
} catch (TagNotFoundException ex) {
logger.config("No id3v1 tag found");
}
}
}
/**
* Calculates hash with algorithm "MD5", "SHA-1" or SHA-256". Hash is calculated EXCLUDING
* meta-data, like id3v1 or id3v2
*
* @return byte[] hash value in byte
* @param String algorithm
* @param int buffersize
* @throws IOException
* @throws InvalidAudioFrameException
* @throws NoSuchAlgorithmException
*/
public byte[] getHash(String algorithm, int bufferSize)
throws InvalidAudioFrameException, IOException, NoSuchAlgorithmException {
File mp3File = getFile();
long startByte = getMP3StartByte(mp3File);
int id3v1TagSize = 0;
if (hasID3v1Tag()) {
ID3v1Tag id1tag = getID3v1Tag();
id3v1TagSize = id1tag.getSize();
}
InputStream inStream = Files.newInputStream(Paths.get(mp3File.getAbsolutePath()));
byte[] buffer = new byte[bufferSize];
MessageDigest digest = MessageDigest.getInstance(algorithm);
inStream.skip(startByte);
int read;
long totalSize = mp3File.length() - startByte - id3v1TagSize;
int pointer = buffer.length;
while (pointer <= totalSize) {
read = inStream.read(buffer);
digest.update(buffer, 0, read);
pointer += buffer.length;
}
read = inStream.read(buffer, 0, (int) totalSize - pointer + buffer.length);
digest.update(buffer, 0, read);
byte[] hash = digest.digest();
return hash;
}
/**
* Check can write to file
*
* @param file
* @throws IOException
*/
public void precheck(File file) throws IOException {
if (!file.exists()) {
logger.severe(
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE_FILE_NOT_FOUND.getMsg(file.getName()));
throw new IOException(
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE_FILE_NOT_FOUND.getMsg(file.getName()));
}
if (!file.canWrite()) {
logger.severe(ErrorMessage.GENERAL_WRITE_FAILED.getMsg(file.getName()));
throw new IOException(ErrorMessage.GENERAL_WRITE_FAILED.getMsg(file.getName()));
}
if (file.length() <= MINIMUM_FILESIZE) {
logger.severe(
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE_FILE_IS_TOO_SMALL.getMsg(file.getName()));
throw new IOException(
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE_FILE_IS_TOO_SMALL.getMsg(file.getName()));
}
}
/**
* Saves the tags in this dataType to the file argument. It will be saved as
* TagConstants.MP3_FILE_SAVE_WRITE
*
* @param fileToSave file to save the this dataTypes tags to
* @throws FileNotFoundException if unable to find file
* @throws IOException on any I/O error
*/
public void save(File fileToSave) throws IOException {
// Ensure we are dealing with absolute filepaths not relative ones
File file = fileToSave.getAbsoluteFile();
logger.config("Saving : " + file.getPath());
// Checks before starting write
precheck(file);
RandomAccessFile rfile = null;
try {
// ID3v2 Tag
if (TagOptionSingleton.getInstance().isId3v2Save()) {
if (id3v2tag == null) {
rfile = new RandomAccessFile(file, "rw");
(new ID3v24Tag()).delete(rfile);
(new ID3v23Tag()).delete(rfile);
(new ID3v22Tag()).delete(rfile);
logger.config("Deleting ID3v2 tag:" + file.getName());
rfile.close();
} else {
logger.config("Writing ID3v2 tag:" + file.getName());
final MP3AudioHeader mp3AudioHeader = (MP3AudioHeader) this.getAudioHeader();
final long mp3StartByte = mp3AudioHeader.getMp3StartByte();
final long newMp3StartByte = id3v2tag.write(file, mp3StartByte);
if (mp3StartByte != newMp3StartByte) {
logger.config("New mp3 start byte: " + newMp3StartByte);
mp3AudioHeader.setMp3StartByte(newMp3StartByte);
}
}
}
rfile = new RandomAccessFile(file, "rw");
// Lyrics 3 Tag
if (TagOptionSingleton.getInstance().isLyrics3Save()) {
if (lyrics3tag != null) {
lyrics3tag.write(rfile);
}
}
// ID3v1 tag
if (TagOptionSingleton.getInstance().isId3v1Save()) {
logger.config("Processing ID3v1");
if (id3v1tag == null) {
logger.config("Deleting ID3v1");
(new ID3v1Tag()).delete(rfile);
} else {
logger.config("Saving ID3v1");
id3v1tag.write(rfile);
}
}
} catch (FileNotFoundException ex) {
logger.log(
Level.SEVERE,
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE_FILE_NOT_FOUND.getMsg(file.getName()),
ex);
throw ex;
} catch (IOException iex) {
logger.log(
Level.SEVERE,
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE.getMsg(file.getName(), iex.getMessage()),
iex);
throw iex;
} catch (RuntimeException re) {
logger.log(
Level.SEVERE,
ErrorMessage.GENERAL_WRITE_FAILED_BECAUSE.getMsg(file.getName(), re.getMessage()),
re);
throw re;
} finally {
if (rfile != null) {
rfile.close();
}
}
}
/**
* Read V2tag if exists
*
* <p>TODO:shouldn't we be handing TagExceptions:when will they be thrown
*
* @param file
* @param loadOptions
* @throws IOException
* @throws TagException
*/
private void readV2Tag(File file, int loadOptions, int startByte)
throws IOException, TagException {
// We know where the actual Audio starts so load all the file from start to that point into
// a buffer then we can read the IDv2 information without needing any more File I/O
if (startByte >= AbstractID3v2Tag.TAG_HEADER_LENGTH) {
logger.finer("Attempting to read id3v2tags");
FileInputStream fis = null;
FileChannel fc = null;
ByteBuffer bb;
try {
fis = new FileInputStream(file);
fc = fis.getChannel();
bb = fc.map(FileChannel.MapMode.READ_ONLY, 0, startByte);
}
// #JAUDIOTAGGER-419:If reading networked file map can fail so just copy bytes instead
catch (IOException ioe) {
bb = ByteBuffer.allocate(startByte);
fc.read(bb, 0);
} finally {
if (fc != null) {
fc.close();
}
if (fis != null) {
fis.close();
}
}
try {
bb.rewind();
if ((loadOptions & LOAD_IDV2TAG) != 0) {
logger.config("Attempting to read id3v2tags");
try {
this.setID3v2Tag(new ID3v24Tag(bb, file.getName()));
} catch (TagNotFoundException ex) {
logger.config("No id3v24 tag found");
}
try {
if (id3v2tag == null) {
this.setID3v2Tag(new ID3v23Tag(bb, file.getName()));
}
} catch (TagNotFoundException ex) {
logger.config("No id3v23 tag found");
}
try {
if (id3v2tag == null) {
this.setID3v2Tag(new ID3v22Tag(bb, file.getName()));
}
} catch (TagNotFoundException ex) {
logger.config("No id3v22 tag found");
}
}
} finally {
// Workaround for 4724038 on Windows
bb.clear();
if (bb.isDirect() && !TagOptionSingleton.getInstance().isAndroid()) {
// Reflection substitute for following code:
// ((sun.nio.ch.DirectBuffer) bb).cleaner().clean();
// which causes exception on Android - Sun NIO classes are not available
try {
Class<?> clazz = Class.forName("sun.nio.ch.DirectBuffer");
Method cleanerMethod = clazz.getMethod("cleaner");
Object cleaner = cleanerMethod.invoke(bb); // cleaner = bb.cleaner()
if (cleaner != null) {
Method cleanMethod = cleaner.getClass().getMethod("clean");
cleanMethod.invoke(cleaner); // cleaner.clean()
}
} catch (ClassNotFoundException e) {
logger.severe("Could not load sun.nio.ch.DirectBuffer.");
} catch (NoSuchMethodException e) {
logger.severe("Could not invoke DirectBuffer method - " + e.getMessage());
} catch (InvocationTargetException e) {
logger.severe("Could not invoke DirectBuffer method - target exception");
} catch (IllegalAccessException e) {
logger.severe("Could not invoke DirectBuffer method - illegal access");
}
}
}
} else {
logger.config("Not enough room for valid id3v2 tag:" + startByte);
}
}
