1 files changed, 90 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/coremedia/iso/.svn/text-base/ChannelHelper.java.svn-base b/isoparser/src/main/java/com/coremedia/iso/.svn/text-base/ChannelHelper.java.svn-base
new file mode 100644
index 0000000..2ec1d05
--- /dev/null
+++ b/isoparser/src/main/java/com/coremedia/iso/.svn/text-base/ChannelHelper.java.svn-base
@@ -0,0 +1,90 @@
+/*
+ * 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.coremedia.iso;
+
+import java.io.EOFException;
+import java.io.IOException;
+import java.nio.ByteBuffer;
+import java.nio.channels.FileChannel;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.SelectionKey;
+import java.nio.channels.WritableByteChannel;
+
+import static com.googlecode.mp4parser.util.CastUtils.l2i;
+
+
+public class ChannelHelper {
+    public static ByteBuffer readFully(final ReadableByteChannel channel, long size) throws IOException {
+
+        if (channel instanceof FileChannel && size > 1024 * 1024) {
+            ByteBuffer bb = ((FileChannel) channel).map(FileChannel.MapMode.READ_ONLY, ((FileChannel) channel).position(), size);
+            ((FileChannel) channel).position(((FileChannel) channel).position() + size);
+            return bb;
+        } else {
+            ByteBuffer buf = ByteBuffer.allocate(l2i(size));
+            readFully(channel, buf, buf.limit());
+            buf.rewind();
+            assert buf.limit() == size;
+
+            return buf;
+        }
+
+    }
+
+
+    public static void readFully(final ReadableByteChannel channel, final ByteBuffer buf)
+            throws IOException {
+        readFully(channel, buf, buf.remaining());
+    }
+
+    public static int readFully(final ReadableByteChannel channel, final ByteBuffer buf, final int length)
+            throws IOException {
+        int n, count = 0;
+        while (-1 != (n = channel.read(buf))) {
+            count += n;
+            if (count == length) {
+                break;
+            }
+        }
+        if (n == -1) {
+            throw new EOFException("End of file. No more boxes.");
+        }
+        return count;
+    }
+
+
+    public static void writeFully(final WritableByteChannel channel, final ByteBuffer buf)
+            throws IOException {
+        do {
+            int written = channel.write(buf);
+            if (written < 0) {
+                throw new EOFException();
+            }
+        } while (buf.hasRemaining());
+    }
+
+
+    public static void close(SelectionKey key) {
+        try {
+            key.channel().close();
+        } catch (IOException e) {
+            // nop
+        }
+
+    }
+
+
+}
+\ No newline at end of file