/*
* Copyright 2006-2007 Columbia University.
*
* This file is part of MEAPsoft.
*
* MEAPsoft is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* MEAPsoft is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MEAPsoft; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* See the file "COPYING" for the text of the license.
*/
package com.meapsoft.composers;
import gnu.getopt.Getopt;
import java.io.IOException;
import java.util.Iterator;
import java.util.Vector;
import com.meapsoft.EDLChunk;
import com.meapsoft.EDLFile;
import com.meapsoft.FeatChunk;
import com.meapsoft.FeatFile;
import com.meapsoft.ParserException;
/**
*
* @author Douglas Repetto
*/
public class IntraChunkShuffleComposer extends Composer
{
public static String description = "IntraChunkShuffleComposer chops each chunk up into small pieces " +
"and rearranges them. This keeps the meta chunks intact but scrambles " +
"them on a local level.";
String outFileName = "shuffle.edl";
FeatFile featFile;
boolean debug = false;
int numSubChunks = 4;
public IntraChunkShuffleComposer(String featFN, String outFN, int chunks)
{
this(new FeatFile(featFN), new EDLFile(outFN), chunks);
}
public IntraChunkShuffleComposer(FeatFile featFN, EDLFile outFN, int chunks)
{
if (featFN == null || outFN == null)
return;
featFile = featFN;
outFile = outFN;
numSubChunks = chunks;
if (numSubChunks <= 1)
numSubChunks = 2;
if(outFile == null)
outFile = new EDLFile("");
}
public void printUsageAndExit()
{
System.out.println("Usage: IntraChunkShuffleComposer [-options] features.feat \n\n" +
" where options include:\n" +
" -o output_file the file to write the output to (defaults to shuffle.edl)\n" +
" -n num_chunks the number of subchunks to divide each chunk into\n" +
" -g debug mode (prints out chunk features on each line of output file)");
System.out.println();
System.exit(0);
}
public IntraChunkShuffleComposer(String[] args)
{
if(args.length == 0)
printUsageAndExit();
Vector features = new Vector();
// Parse arguments
String argString = "o:n:g";
Getopt opt = new Getopt("IntraChunkShuffleComposer", args, argString);
opt.setOpterr(false);
int c = -1;
while ((c =opt.getopt()) != -1)
{
switch(c)
{
case 'o':
outFileName = opt.getOptarg();
break;
case 'n':
numSubChunks = new Integer(opt.getOptarg()).intValue();
if (numSubChunks <= 1)
numSubChunks = 2;
case 'g':
debug = true;
break;
case '?':
printUsageAndExit();
break;
default:
System.out.print("getopt() returned " + c + "\n");
}
}
// parse arguments
int ind = opt.getOptind();
if(ind > args.length)
printUsageAndExit();
featFile = new FeatFile(args[args.length-1]);
outFile = new EDLFile(outFileName);
System.out.println("Composing " + outFileName +
" from " + args[args.length-1] + ".");
}
public void setup() throws IOException, ParserException
{
super.setup();
if(!featFile.haveReadFile)
featFile.readFile();
if(featFile.chunks.size() == 0)
throw new ParserException(featFile.filename, "No chunks found");
progress.setMaximum(featFile.chunks.size());
}
public EDLFile compose()
{
Iterator c = featFile.chunks.iterator();
double currTime = 0;
//iterate through all the chunks that the segmenter found
while(c.hasNext())
{
//your current features chunk
FeatChunk ch = (FeatChunk)c.next();
double length = ch.length/numSubChunks;
double localStartTime = ch.startTime;
for (int i = numSubChunks - 1; i >= 0; i--)
{
//make a new EDL chunk from the current features chunk
//EDLChunk original = new EDLChunk(ch, currTime);
EDLChunk chunk = new EDLChunk(ch.srcFile,
localStartTime + (i * length), length, currTime);
//EDLChunk blip = new EDLChunk("data" +
// System.getProperty("file.separator") + "blip.wav",
// 0, 0.1, currTime);
//write both chunks out to the new EDL file
outFile.chunks.add(chunk);
//Increment currTime by twice the length of the chunk
//since we've added two chunks.
currTime += length;
}
progress.setValue(progress.getValue()+1);
}
// outFile now contains some chunks.
outFile.haveReadFile = true;
return outFile;
}
public static void main(String[] args)
{
IntraChunkShuffleComposer m = new IntraChunkShuffleComposer(args);
long startTime = System.currentTimeMillis();
m.run();
System.out.println("Done. Took " +
((System.currentTimeMillis() - startTime)/1000.0)
+ "s");
System.exit(0);
}
}