Small png cleaning.

src/core/streams/BitStream.cpp

@@ -19,6 +19,14 @@ unsigned char BitStream::getCurrentByte()
     return mCurrentByte;
 }
 
+void BitStream::write(uint32_t data)
+{
+    unsigned num_bytes = sizeof(uint32_t);
+    for(unsigned idx=0; idx<num_bytes;idx++)
+    {
+        writeByte(ByteUtils::getByteN(data, idx));
+    }
+}
 
 int BitStream::getCurrentByteOffset() const
 {

src/core/streams/BitStream.h

@@ -27,6 +27,8 @@ public:
 
     virtual void writeByte(unsigned char data) = 0;
 
+    void write(uint32_t data);
+
     virtual void writeBytes(const std::vector<unsigned char> data) = 0;
 
 protected:

src/core/streams/BufferBitStream.h

@@ -27,6 +27,12 @@ public:
         return mBuffer;
     }
 
+    void resetOffsets()
+    {
+        mByteOffset = 0;
+        mBitOffset = 0;
+    }
+
 private:
     std::vector<unsigned char> mBuffer;
 };