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+// This code contains NVIDIA Confidential Information and is disclosed to you
+// under a form of NVIDIA software license agreement provided separately to you.
+//
+// Notice
+// NVIDIA Corporation and its licensors retain all intellectual property and
+// proprietary rights in and to this software and related documentation and
+// any modifications thereto. Any use, reproduction, disclosure, or
+// distribution of this software and related documentation without an express
+// license agreement from NVIDIA Corporation is strictly prohibited.
+//
+// ALL NVIDIA DESIGN SPECIFICATIONS, CODE ARE PROVIDED "AS IS.". NVIDIA MAKES
+// NO WARRANTIES, EXPRESSED, IMPLIED, STATUTORY, OR OTHERWISE WITH RESPECT TO
+// THE MATERIALS, AND EXPRESSLY DISCLAIMS ALL IMPLIED WARRANTIES OF NONINFRINGEMENT,
+// MERCHANTABILITY, AND FITNESS FOR A PARTICULAR PURPOSE.
+//
+// Information and code furnished is believed to be accurate and reliable.
+// However, NVIDIA Corporation assumes no responsibility for the consequences of use of such
+// information or for any infringement of patents or other rights of third parties that may
+// result from its use. No license is granted by implication or otherwise under any patent
+// or patent rights of NVIDIA Corporation. Details are subject to change without notice.
+// This code supersedes and replaces all information previously supplied.
+// NVIDIA Corporation products are not authorized for use as critical
+// components in life support devices or systems without express written approval of
+// NVIDIA Corporation.
+//
+// Copyright (c) 2008-2014 NVIDIA Corporation. All rights reserved.
+// Copyright (c) 2004-2008 AGEIA Technologies, Inc. All rights reserved.
+// Copyright (c) 2001-2004 NovodeX AG. All rights reserved.
+
+#ifndef NV_NVFOUNDATION_NVIO_H
+#define NV_NVFOUNDATION_NVIO_H
+
+/** \addtogroup common
+  @{
+*/
+
+#include "NvSimpleTypes.h"
+
+#if !NV_DOXYGEN
+namespace nvidia
+{
+#endif
+
+/**
+\brief Input stream class for I/O.
+
+The user needs to supply a NvInputStream implementation to a number of methods to allow the SDK to read data.
+*/
+
+class NvInputStream
+{
+  public:
+	/**
+	\brief read from the stream. The number of bytes read may be less than the number requested.
+
+	\param[in] dest the destination address to which the data will be read
+	\param[in] count the number of bytes requested
+
+	\return the number of bytes read from the stream.
+	*/
+
+	virtual uint32_t read(void* dest, uint32_t count) = 0;
+
+	virtual ~NvInputStream()
+	{
+	}
+};
+
+/**
+\brief Input data class for I/O which provides random read access.
+
+The user needs to supply a NvInputData implementation to a number of methods to allow the SDK to read data.
+*/
+
+class NvInputData : public NvInputStream
+{
+  public:
+	/**
+	\brief return the length of the input data
+
+	\return size in bytes of the input data
+	*/
+
+	virtual uint32_t getLength() const = 0;
+
+	/**
+	\brief seek to the given offset from the start of the data.
+
+	\param[in] offset the offset to seek to. 	If greater than the length of the data, this call is equivalent to
+	seek(length);
+	*/
+
+	virtual void seek(uint32_t offset) = 0;
+
+	/**
+	\brief return the current offset from the start of the data
+
+	\return the offset to seek to.
+	*/
+
+	virtual uint32_t tell() const = 0;
+
+	virtual ~NvInputData()
+	{
+	}
+};
+
+/**
+\brief Output stream class for I/O.
+
+The user needs to supply a NvOutputStream implementation to a number of methods to allow the SDK to write data.
+*/
+
+class NvOutputStream
+{
+  public:
+	/**
+	\brief write to the stream. The number of bytes written may be less than the number sent.
+
+	\param[in] src the destination address from which the data will be written
+	\param[in] count the number of bytes to be written
+
+	\return the number of bytes written to the stream by this call.
+	*/
+
+	virtual uint32_t write(const void* src, uint32_t count) = 0;
+
+	virtual ~NvOutputStream()
+	{
+	}
+};
+
+#if !NV_DOXYGEN
+} // namespace nvidia
+#endif
+
+/** @} */
+#endif // #ifndef NV_NVFOUNDATION_NVIO_H