1 files changed, 114 insertions, 0 deletions

diff --git a/isoparser/src/main/java/com/coremedia/iso/boxes/.svn/text-base/FreeBox.java.svn-base b/isoparser/src/main/java/com/coremedia/iso/boxes/.svn/text-base/FreeBox.java.svn-base
new file mode 100644
index 0000000..636c9a7
--- /dev/null
+++ b/isoparser/src/main/java/com/coremedia/iso/boxes/.svn/text-base/FreeBox.java.svn-base
@@ -0,0 +1,114 @@
+/*  
+ * Copyright 2008 CoreMedia AG, Hamburg
+ *
+ * Licensed under the Apache License, Version 2.0 (the License); 
+ * you may not use this file except in compliance with the License. 
+ * You may obtain a copy of the License at 
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0 
+ * 
+ * Unless required by applicable law or agreed to in writing, software 
+ * distributed under the License is distributed on an AS IS BASIS, 
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ * See the License for the specific language governing permissions and 
+ * limitations under the License. 
+ */
+
+package com.coremedia.iso.boxes;
+
+
+import com.coremedia.iso.BoxParser;
+import com.coremedia.iso.ChannelHelper;
+import com.coremedia.iso.IsoTypeWriter;
+import com.googlecode.mp4parser.AbstractBox;
+
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.WritableByteChannel;
+import java.util.LinkedList;
+import java.util.List;
+
+import static com.googlecode.mp4parser.util.CastUtils.l2i;
+
+/**
+ * A free box. Just a placeholder to enable editing without rewriting the whole file.
+ */
+public class FreeBox implements Box {
+    public static final String TYPE = "free";
+    ByteBuffer data;
+    List<Box> replacers = new LinkedList<Box>();
+    private ContainerBox parent;
+
+    public FreeBox() {
+    }
+
+    public FreeBox(int size) {
+        this.data = ByteBuffer.allocate(size);
+    }
+
+
+    public ByteBuffer getData() {
+        return data;
+    }
+
+    public void setData(ByteBuffer data) {
+        this.data = data;
+    }
+
+    public void getBox(WritableByteChannel os) throws IOException {
+        for (Box replacer : replacers) {
+            replacer.getBox(os);
+        }
+        ByteBuffer header = ByteBuffer.allocate(8);
+        IsoTypeWriter.writeUInt32(header, 8 + data.limit());
+        header.put(TYPE.getBytes());
+        header.rewind();
+        os.write(header);
+        data.rewind();
+        os.write(data);
+
+    }
+
+    public ContainerBox getParent() {
+        return parent;
+    }
+
+    public void setParent(ContainerBox parent) {
+        this.parent = parent;
+    }
+
+    public long getSize() {
+        long size = 8;
+        for (Box replacer : replacers) {
+            size += replacer.getSize();
+        }
+        size += data.limit();
+        return size;
+    }
+
+    public String getType() {
+        return TYPE;
+    }
+
+    public void parse(ReadableByteChannel readableByteChannel, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException {
+        if (readableByteChannel instanceof FileChannel && contentSize > 1024 * 1024) {
+            // It's quite expensive to map a file into the memory. Just do it when the box is larger than a MB.
+            data = ((FileChannel) readableByteChannel).map(FileChannel.MapMode.READ_ONLY, ((FileChannel) readableByteChannel).position(), contentSize);
+            ((FileChannel) readableByteChannel).position(((FileChannel) readableByteChannel).position() + contentSize);
+        } else {
+            assert contentSize < Integer.MAX_VALUE;
+            data = ChannelHelper.readFully(readableByteChannel, contentSize);
+        }
+    }
+
+
+    public void addAndReplace(Box box) {
+        data.position(l2i(box.getSize()));
+        data = data.slice();
+        replacers.add(box);
+    }
+
+
+}
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