question: public boolean parseMoreData ( final EncodedImage encodedImage ) { if ( mParserState == NOT_A_JPEG ) { return false ; } final int dataBufferSize = encodedImage . getSize ( ) ; if ( dataBufferSize <= mBytesParsed ) { return false ; } final InputStream bufferedDataStream = new PooledByteArrayBufferedInputStream ( encodedImage . getInputStream ( ) , mByteArrayPool . get ( BUFFER_SIZE ) , mByteArrayPool ) ; try { StreamUtil . skip ( bufferedDataStream , mBytesParsed ) ; return doParseMoreData ( bufferedDataStream ) ; } catch ( IOException ioe ) { Throwables . propagate ( ioe ) ; return false ; } finally { Closeables . closeQuietly ( bufferedDataStream ) ; } }
target:  If this is the first time calling this method, the buffer will be checked to make sure it starts with SOI marker (0xffd8). If the image has been identified as a non-JPEG, data will be ignored and false will be returned immediately on all subsequent calls. This object maintains state of the position of the last read byte. On repeated calls to this method, it will continue from where it left off.