1 files changed, 50 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/authoring/builder/.svn/text-base/ByteBufferHelper.java.svn-base b/isoparser/src/main/java/com/googlecode/mp4parser/authoring/builder/.svn/text-base/ByteBufferHelper.java.svn-base
new file mode 100644
index 0000000..ad21b11
--- /dev/null
+++ b/isoparser/src/main/java/com/googlecode/mp4parser/authoring/builder/.svn/text-base/ByteBufferHelper.java.svn-base
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2012 Sebastian Annies, 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.googlecode.mp4parser.authoring.builder;
+
+import java.nio.ByteBuffer;
+import java.nio.MappedByteBuffer;
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Used to merge adjacent byte buffers.
+ */
+public class ByteBufferHelper {
+    public static List<ByteBuffer> mergeAdjacentBuffers(List<ByteBuffer> samples) {
+        ArrayList<ByteBuffer> nuSamples = new ArrayList<ByteBuffer>(samples.size());
+        for (ByteBuffer buffer : samples) {
+            int lastIndex = nuSamples.size() - 1;
+            if (lastIndex >= 0 && buffer.hasArray() && nuSamples.get(lastIndex).hasArray() && buffer.array() == nuSamples.get(lastIndex).array() &&
+                    nuSamples.get(lastIndex).arrayOffset() + nuSamples.get(lastIndex).limit() == buffer.arrayOffset()) {
+                ByteBuffer oldBuffer = nuSamples.remove(lastIndex);
+                ByteBuffer nu = ByteBuffer.wrap(buffer.array(), oldBuffer.arrayOffset(), oldBuffer.limit() + buffer.limit()).slice();
+                // We need to slice here since wrap([], offset, length) just sets position and not the arrayOffset.
+                nuSamples.add(nu);
+            } else if (lastIndex >= 0 &&
+                    buffer instanceof MappedByteBuffer && nuSamples.get(lastIndex) instanceof MappedByteBuffer &&
+                    nuSamples.get(lastIndex).limit() == nuSamples.get(lastIndex).capacity() - buffer.capacity()) {
+                // This can go wrong - but will it?
+                ByteBuffer oldBuffer = nuSamples.get(lastIndex);
+                oldBuffer.limit(buffer.limit() + oldBuffer.limit());
+            } else {
+                buffer.rewind();
+                nuSamples.add(buffer);
+            }
+        }
+        return nuSamples;
+    }
+}