/*
DataEventFormatter.java
(c) 2012-2013 Edward Swartz
All rights reserved. This program and the accompanying materials
are made available under the terms of the Eclipse Public License v1.0
which accompanies this distribution, and is available at
http://www.eclipse.org/legal/epl-v10.html
*/
package v9t9.engine.demos.format;
import java.io.IOException;
import java.util.Arrays;
import v9t9.common.demos.IDemoEvent;
import v9t9.common.demos.IDemoInputEventBuffer;
import v9t9.common.demos.IDemoOutputEventBuffer;
import v9t9.engine.demos.events.WriteDataBlock;
/**
* @author ejs
*
*/
public abstract class DataEventFormatter extends BaseEventFormatter {
/**
* @param videoData
*/
public DataEventFormatter(String bufferId, String eventId) {
super(bufferId, eventId);
}
/* (non-Javadoc)
* @see v9t9.common.demo.IDemoEventFormatter#readEvent(v9t9.common.demo.IDemoInputEventBuffer)
*/
@Override
public IDemoEvent readEvent(IDemoInputEventBuffer buffer)
throws IOException {
int addr = ((DemoInputEventBuffer) buffer).readVar();
int chunkLength = ((DemoInputEventBuffer) buffer).readVar();
if (chunkLength < 0) {
// RLE repeat
byte[] chunk = new byte[-chunkLength];
int val = buffer.read();
//System.err.println("RLE: " + Integer.toHexString(regOrAddr) +" @ " + Integer.toHexString(-chunkLength) + " = " + Integer.toHexString(val));
Arrays.fill(chunk, (byte) val);
return createWriteDataEvent(addr, chunk);
} else {
// real data
//System.err.println("Data: " + Integer.toHexString(regOrAddr) +" @ " + Integer.toHexString(chunkLength));
byte[] data = buffer.readData(chunkLength);
return createWriteDataEvent(addr, data);
}
}
protected abstract IDemoEvent createWriteDataEvent(int addr, byte[] data);
/* (non-Javadoc)
* @see v9t9.common.demo.IDemoEventFormatter#writeEvent(v9t9.common.demo.IDemoOutputEventBuffer, v9t9.common.demo.IDemoEvent)
*/
@Override
public void writeEvent(IDemoOutputEventBuffer buffer, IDemoEvent event)
throws IOException {
WriteDataBlock we = (WriteDataBlock) event;
((DemoOutputEventBuffer) buffer).pushRleMemoryWriteData(8, we.getAddress(),
we.getData(), we.getOffset(), we.getLength());
}
}