private void ProcessBuffer(boolean bFinalize) throws IOException {
if (m_pBuffer == null) throw new JMACException("Error Undefined");
// process as much as possible
int nThreshold = (bFinalize) ? 0 : m_spAPECompressCreate.GetFullFrameBytes();
while ((m_nBufferTail - m_nBufferHead) >= nThreshold) {
int nFrameBytes =
Math.min(m_spAPECompressCreate.GetFullFrameBytes(), m_nBufferTail - m_nBufferHead);
if (nFrameBytes == 0) break;
pByteReader.reset(m_pBuffer, m_nBufferHead);
m_spAPECompressCreate.EncodeFrame(pByteReader, nFrameBytes);
m_nBufferHead += nFrameBytes;
}
// shift the buffer
if (m_nBufferHead != 0) {
int nBytesLeft = m_nBufferTail - m_nBufferHead;
if (nBytesLeft != 0) System.arraycopy(m_pBuffer, m_nBufferHead, m_pBuffer, 0, nBytesLeft);
m_nBufferTail -= m_nBufferHead;
m_nBufferHead = 0;
}
}
public static ID3Tag read(final File file) throws IOException {
long offset = file.length() - ID3_TAG_BYTES;
if (offset < 0) return null;
file.seek(offset);
try {
final ID3Tag tag = new ID3Tag();
final ByteArrayReader reader = new ByteArrayReader(file, ID3_TAG_BYTES);
tag.Header = reader.readString(3, defaultEncoding);
tag.Title = reader.readString(30, defaultEncoding);
tag.Artist = reader.readString(30, defaultEncoding);
tag.Album = reader.readString(30, defaultEncoding);
tag.Year = reader.readString(4, defaultEncoding);
tag.Comment = reader.readString(29, defaultEncoding);
tag.Track = reader.readUnsignedByte();
tag.Genre = reader.readUnsignedByte();
return tag.Header.equals("TAG") ? tag : null;
} catch (EOFException e) {
return null;
}
}