| Methods Summary |
|---|
| public java.nio.ByteBuffer | destroy()
is_paused = true;
destroyed = true;
header_reader.destroy();
if( payload_buffer != null ) {
payload_buffer.returnToPool();
payload_buffer = null;
}
for( int i=0; i < messages_last_read.size(); i++ ) {
Message msg = (Message)messages_last_read.get( i );
msg.destroy();
}
messages_last_read.clear();
return null; //NOTE: we don't bother returning any already-read data
|
| public int | getDataBytesDecoded() return data_bytes_last_read;
|
| public int | getPercentDoneOfCurrentMessage()
return percent_complete;
|
| public int | getProtocolBytesDecoded() return protocol_bytes_last_read;
|
| public void | pauseDecoding()
is_paused = true;
|
| public int | performStreamDecode(com.aelitis.azureus.core.networkmanager.Transport transport, int max_bytes)
protocol_bytes_last_read = 0;
data_bytes_last_read = 0;
int bytes_remaining = max_bytes;
while( bytes_remaining > 0 ) {
if( destroyed ) {
Debug.out( "ADV decoder already destroyed: " +transport.getDescription() );
break;
}
if( is_paused ) {
Debug.out( "ADV decoder paused" );
break;
}
int bytes_possible = preReadProcess( bytes_remaining );
if( bytes_possible < 1 ) {
Debug.out( "ERROR ADV: bytes_possible < 1" );
break;
}
if( reading_length_mode ) {
transport.read( decode_array, 1, 1 ); //only read into length buffer
}
else {
transport.read( decode_array, 0, 2 ); //read payload buffer, and possibly next message length buffer
}
int bytes_read = postReadProcess();
bytes_remaining -= bytes_read;
if( bytes_read < bytes_possible ) {
break;
}
}
return max_bytes - bytes_remaining;
|
| private int | postReadProcess()
int bytes_read = 0;
if( !reading_length_mode && !destroyed ) { //reading payload data mode
//ensure-restore proper buffer limits
payload_buffer.limit( SS, message_length );
bytes_read += payload_buffer.position( SS ) - pre_read_start_position;
if( !payload_buffer.hasRemaining( SS ) && !is_paused ) { //full message received!
payload_buffer.position( SS, 0 ); //prepare for use
DirectByteBuffer ref_buff = payload_buffer;
payload_buffer = null;
try {
header_reader.getMessageID();
header_reader.getMessageSubID();
Message msg = null;//AZMessageFactory.createAZMessage( ref_buff ); //TODO
if( false ) throw new MessageException( "" ); //TODO remove
messages_last_read.add( msg );
//we only learn what type of message it is AFTER we are done decoding it, so we probably need to work off the count post-hoc
if( msg.getType() == Message.TYPE_DATA_PAYLOAD ) {
data_bytes_owed += message_length;
}
}
catch( MessageException me ) {
ref_buff.returnToPool();
throw new IOException( "ADV message decode failed: " + me.getMessage() );
}
reading_length_mode = true; //see if we've already read the next message's length
percent_complete = -1; //reset receive percentage
}
else { //only partial received so far
percent_complete = (payload_buffer.position( SS ) * 100) / message_length; //compute receive percentage
}
}
if( reading_length_mode && !destroyed ) {
bytes_read += (pre_read_start_buffer == 1) ? decode_array[1].position() - pre_read_start_position : decode_array[1].position();
if( header_reader.isHeaderReadComplete() ) { //done reading the length and message id header
reading_length_mode = false;
message_length = header_reader.getMessageLength();
if( message_length > MAX_MESSAGE_LENGTH ) {
throw new IOException( "Invalid message length given for ADV message decode: " + message_length );
}
payload_buffer = DirectByteBufferPool.getBuffer( DirectByteBuffer.AL_MSG_AZ_PAYLOAD, message_length );
}
}
if( bytes_read < data_bytes_owed ) {
data_bytes_last_read += bytes_read;
data_bytes_owed -= bytes_read;
}
else { //bytes_read >= data_bytes_owed
data_bytes_last_read += data_bytes_owed;
data_bytes_owed = 0;
protocol_bytes_last_read += bytes_read - data_bytes_owed;
}
return bytes_read;
|
| private int | preReadProcess(int allowed)
if( allowed < 1 ) {
Debug.out( "allowed < 1" );
}
decode_array[ 0 ] = payload_buffer == null ? null : payload_buffer.getBuffer( SS ); //ensure the decode array has the latest payload pointer
decode_array[ 1 ] = header_reader.getReadBuffer(); //ensure it has the latest header buffer ref
int bytes_available = 0;
boolean shrink_remaining_buffers = false;
int start_buff = reading_length_mode ? 1 : 0;
boolean marked = false;
for( int i = start_buff; i < 2; i++ ) { //set buffer limits according to bytes allowed
ByteBuffer bb = decode_array[ i ];
if( bb == null ) {
Debug.out( "preReadProcess:: bb["+i+"] == null, decoder destroyed=" +destroyed );
}
if( shrink_remaining_buffers ) {
bb.limit( 0 ); //ensure no read into this next buffer is possible
}
else {
int remaining = bb.remaining();
if( remaining < 1 ) continue; //skip full buffer
if( !marked ) {
pre_read_start_buffer = i;
pre_read_start_position = bb.position();
marked = true;
}
if( remaining > allowed ) { //read only part of this buffer
bb.limit( bb.position() + allowed ); //limit current buffer
bytes_available += bb.remaining();
shrink_remaining_buffers = true; //shrink any tail buffers
}
else { //full buffer is allowed to be read
bytes_available += remaining;
allowed -= remaining; //count this buffer toward allowed and move on to the next
}
}
}
return bytes_available;
|
| public Message[] | removeDecodedMessages()
if( messages_last_read.isEmpty() ) return null;
Message[] msgs = (Message[])messages_last_read.toArray( new Message[messages_last_read.size()] );
messages_last_read.clear();
return msgs;
|
| public void | resumeDecoding()
is_paused = false;
|
