1 files changed, 36 insertions, 0 deletions
diff --git a/isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/objectdescriptors/.svn/text-base/BitWriterBuffer.java.svn-base b/isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/objectdescriptors/.svn/text-base/BitWriterBuffer.java.svn-base
new file mode 100644
index 0000000..e6ea67f
--- /dev/null
+++ b/isoparser/src/main/java/com/googlecode/mp4parser/boxes/mp4/objectdescriptors/.svn/text-base/BitWriterBuffer.java.svn-base
@@ -0,0 +1,36 @@
+package com.googlecode.mp4parser.boxes.mp4.objectdescriptors;
+
+import java.nio.ByteBuffer;
+
+public class BitWriterBuffer {
+
+    private ByteBuffer buffer;
+    int initialPos;
+    int position = 0;
+
+    public BitWriterBuffer(ByteBuffer buffer) {
+        this.buffer = buffer;
+        this.initialPos = buffer.position();
+    }
+
+    public void writeBits(int i, int numBits) {
+        assert i <= ((1 << numBits)-1): String.format("Trying to write a value bigger (%s) than the number bits (%s) allows. " +
+                "Please mask the value before writing it and make your code is really working as intended.", i, (1<<numBits)-1);
+
+        int left = 8 - position % 8;
+        if (numBits <= left) {
+            int current = (buffer.get(initialPos + position / 8));
+            current = current < 0 ? current + 256 : current;
+            current += i << (left - numBits);
+            buffer.put(initialPos + position / 8, (byte) (current > 127 ? current - 256 : current));
+            position += numBits;
+        } else {
+            int bitsSecondWrite = numBits - left;
+            writeBits(i >> bitsSecondWrite, left);
+            writeBits(i & (1 << bitsSecondWrite) - 1, bitsSecondWrite);
+        }
+        buffer.position(initialPos + position / 8 + ((position % 8 > 0) ? 1 : 0));
+    }
+
+
+}