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diff --git a/indra/llkdu/llkdumem.h b/indra/llkdu/llkdumem.h
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+++ b/indra/llkdu/llkdumem.h
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+/** 
+ * @file llkdumem.h
+ * @brief Helper class for kdu memory management
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_LLKDUMEM_H
+#define LL_LLKDUMEM_H
+
+// Support classes for reading and writing from memory buffers in KDU
+#include "kdu_image.h"
+#include "kdu_elementary.h"
+#include "kdu_messaging.h"
+#include "kdu_params.h"
+#include "kdu_compressed.h"
+#include "kdu_sample_processing.h"
+#include "image_local.h"
+#include "stdtypes.h"
+
+class LLKDUMemSource: public kdu_compressed_source
+{
+public: // Member functions
+	LLKDUMemSource(U8 *input_buffer, U32 size)
+	{
+		mData = input_buffer;
+		mSize = size;
+		mCurPos = 0;
+	}
+
+    ~LLKDUMemSource()
+	{
+	}
+
+    int read(kdu_byte *buf, int num_bytes)
+	{
+		U32 num_out;
+		num_out = num_bytes;
+
+		if ((mSize - mCurPos) < (U32)num_bytes)
+		{
+			num_out = mSize -mCurPos;
+		}
+		memcpy(buf, mData + mCurPos, num_out);
+		mCurPos += num_out;
+		return num_out;
+	}
+
+	void reset()
+	{
+		mCurPos = 0;
+	}
+
+private: // Data
+	U8 *mData;
+	U32 mSize;
+	U32 mCurPos;
+};
+
+class LLKDUMemTarget: public kdu_compressed_target
+{
+public: // Member functions
+	LLKDUMemTarget(U8 *output_buffer, U32 &output_size, const U32 buffer_size)
+	{
+		mData = output_buffer;
+		mSize = buffer_size;
+		mCurPos = 0;
+		mOutputSize = &output_size;
+	}
+
+    ~LLKDUMemTarget()
+    {
+	}
+
+    bool write(const kdu_byte *buf, int num_bytes)
+	{
+		U32 num_out;
+		num_out = num_bytes;
+
+		if ((mSize - mCurPos) < (U32)num_bytes)
+		{
+			num_out = mSize - mCurPos;
+			memcpy(mData + mCurPos, buf, num_out);
+			return false;
+		}
+		memcpy(mData + mCurPos, buf, num_out);
+		mCurPos += num_out;
+		*mOutputSize = mCurPos;
+		return true;
+	}
+	
+private: // Data
+	U8 *mData;
+	U32 mSize;
+	U32 mCurPos;
+	U32 *mOutputSize;
+};
+
+class LLKDUMemIn : public kdu_image_in_base
+{
+public: // Member functions
+    LLKDUMemIn(const U8 *data,
+				const U32 size,
+				const U16 rows,
+				const U16 cols,
+				U8 in_num_components,
+				siz_params *siz);
+    ~LLKDUMemIn();
+
+    bool get(int comp_idx, kdu_line_buf &line, int x_tnum);
+
+private: // Data
+	const U8 *mData;
+    int first_comp_idx;
+    int num_components;
+    int rows, cols;
+    int alignment_bytes; // Number of 0's at end of each line.
+    int precision[3];
+    image_line_buf *incomplete_lines; // Each "sample" represents a full pixel
+    image_line_buf *free_lines;
+    int num_unread_rows;
+
+	U32 mCurPos;
+	U32 mDataSize;
+};
+#endif