www in docker support

decompiled-libs/www/acxent-videoj-1.0.0/org/jcodec/movtool/Undo.java

@@ -0,0 +1,82 @@
+package org.jcodec.movtool;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.ArrayList;
+import java.util.List;
+import org.jcodec.common.io.IOUtils;
+import org.jcodec.common.io.NIOUtils;
+import org.jcodec.common.io.SeekableByteChannel;
+import org.jcodec.containers.mp4.BoxFactory;
+import org.jcodec.containers.mp4.BoxUtil;
+import org.jcodec.containers.mp4.MP4Util;
+import org.jcodec.containers.mp4.boxes.Box;
+import org.jcodec.containers.mp4.boxes.Header;
+import org.jcodec.containers.mp4.boxes.NodeBox;
+
+public class Undo {
+  public static void main1(String[] args) throws IOException {
+    if (args.length < 1) {
+      System.err.println("Syntax: qt-undo [-l] <movie>");
+      System.err.println("\t-l\t\tList all the previous versions of this movie.");
+      System.exit(-1);
+    } 
+    Undo undo = new Undo();
+    if ("-l".equals(args[0])) {
+      List<MP4Util.Atom> list = undo.list(args[1]);
+      System.out.println("" + list.size() - 1 + " versions.");
+    } else {
+      undo.undo(args[0]);
+    } 
+  }
+  
+  private void undo(String fineName) throws IOException {
+    List<MP4Util.Atom> versions = list(fineName);
+    if (versions.size() < 2) {
+      System.err.println("Nowhere to rollback.");
+      return;
+    } 
+    RandomAccessFile raf = null;
+    try {
+      raf = new RandomAccessFile(new File(fineName), "rw");
+      raf.seek(versions.get(versions.size() - 2).getOffset() + 4L);
+      raf.write(new byte[] { (byte)109, (byte)111, (byte)111, (byte)118 });
+      raf.seek(versions.get(versions.size() - 1).getOffset() + 4L);
+      raf.write(new byte[] { (byte)102, (byte)114, (byte)101, (byte)101 });
+    } finally {
+      IOUtils.closeQuietly(raf);
+    } 
+  }
+  
+  private List<MP4Util.Atom> list(String fileName) throws IOException {
+    ArrayList<MP4Util.Atom> result = new ArrayList<>();
+    SeekableByteChannel is = null;
+    try {
+      is = NIOUtils.readableChannel(new File(fileName));
+      int version = 0;
+      for (MP4Util.Atom atom : MP4Util.getRootAtoms(is)) {
+        if ("free".equals(atom.getHeader().getFourcc()) && isMoov(is, atom))
+          result.add(atom); 
+        if ("moov".equals(atom.getHeader().getFourcc())) {
+          result.add(atom);
+          break;
+        } 
+      } 
+    } finally {
+      IOUtils.closeQuietly(is);
+    } 
+    return result;
+  }
+  
+  private boolean isMoov(SeekableByteChannel is, MP4Util.Atom atom) throws IOException {
+    is.setPosition(atom.getOffset() + atom.getHeader().headerSize());
+    try {
+      Box mov = BoxUtil.parseBox(NIOUtils.fetchFromChannel(is, (int)atom.getHeader().getSize()), Header.createHeader("moov", 
+            atom.getHeader().getSize()), BoxFactory.getDefault());
+      return (mov instanceof org.jcodec.containers.mp4.boxes.MovieBox && BoxUtil.containsBox((NodeBox)mov, "mvhd"));
+    } catch (Throwable t) {
+      return false;
+    } 
+  }
+}