umc_fio_reader.h

这是在PCA下的基于IPP库示例代码例子,在网上下了IPP的库之后,设置相关参数就可以编译该代码.

/*
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2003-2005 Intel Corporation. All Rights Reserved.
//
*/

#ifndef __UMC_FIO_READER_H__
#define __UMC_FIO_READER_H__

#include "umc_defs.h"
#if defined (UMC_ENABLE_FIO_READER)

#include "umc_file_reader.h"
#include <stdio.h>

namespace UMC
{
    class FIOReader : public DataReader
    {
        DYNAMIC_CAST_DECL(FIOReader, DataReader);
    public:


        //////////////////////////////////////////////////////////////////////////////
        //  Name:           Init
        //
        //  Purpose:        Create and map first portion from file
        //
        //  Parameters:
        //    InitParams    Pointer to the init (for filereader it's vm_char file_name[255] and portion_size
        //
        //
        //  Return:
        //    UMC_OK
        //    UMC_FAILED_TO_OPEN_DEVICE         file was not open
        //    UMC_FAILED_TO_ALLOCATE_BUFFER     mapping was not create
        //
        //
        //  Notes:      default value of portion_size is 0. After open portion = 1
        //
        ////////////////////////////////////////////////////////////////////////////////
        virtual Status      Init            (DataReaderParams *InitParams);


        //////////////////////////////////////////////////////////////////////////////
        //  Name:           Close
        //
        //  Purpose:        Close file
        //
        //  Return:
        //    UMC_OK
        //
        //  Notes:
        //
        ////////////////////////////////////////////////////////////////////////////////
        virtual Status      Close           ();


        //////////////////////////////////////////////////////////////////////////////
        //  Name:           Reset
        //
        //  Purpose:        Reset all internal parameters
        //
        //  Parameters:
        //
        //  Return:
        //    UMC_OK
        //    UMC_NOT_INITIALIZED           - object was not initialize
        //    UMC_FAILED_TO_ALLOCATE_BUFFER - mapping was not create
        //
        //  Notes:
        //
        ////////////////////////////////////////////////////////////////////////////////
        virtual Status      Reset           ();


        //////////////////////////////////////////////////////////////////////////////
        //  Name:           ReadData
        //
        //  Purpose:        Read nsize bytes and copy to data (return number bytes which was copy)
        //                  Cache data in case of small nsize
        //
        //  Parameters:
        //    data          pointer to the data where copy nsize byte from stream
        //    nsize         integer - number bytes
        //
        //
        //  Return:
        //    UMC_OK
        //    UMC_NOT_INITIALIZED           - object was not initialize
        //    UMC_END_OF_STREAM             - end of stream
        //
        //
        //
        ////////////////////////////////////////////////////////////////////////////////

        virtual Status      ReadData         (void *data,vm_var32 *nsize)        ;


        //////////////////////////////////////////////////////////////////////////////
        //  Name:           MovePosition
        //
        //  Purpose:        Move position on npos bytes
        //
        //  Parameters:
        //    npos          integer (+/-) bytes
        //
        //
        //  Return:
        //    UMC_OK
        //    UMC_NOT_INITIALIZED           - object was not initialize
        //    UMC_END_OF_STREAM             - end of stream
        //
        //
        //  Notes:
        //
        ////////////////////////////////////////////////////////////////////////////////
        virtual Status              MovePosition            (vm_sizet npos)     ;


        virtual Status      CacheData       (void *data, vm_var32 *nsize, int how_far);

        //////////////////////////////////////////////////////////////////////////////
        //  Name:           SetPosition
        //
        //  Purpose:        Set position
        //
        //  Parameters:
        //    pos           double (0:1.0)
        //
        //  Return:
        //    OK
        //    ERR_MAP    Error map next portion
        //
        //  Notes: set position in the stream (file size * pos)
        //
        ////////////////////////////////////////////////////////////////////////////////
        virtual Status                  SetPosition     (double pos);


            // return position in the stream
        virtual vm_sizet                GetPosition     ();

            // return file_size
        virtual vm_sizet                GetSize         ();



        FIOReader();
        virtual ~FIOReader();


    protected:

        FILE*               m_pFile;

        vm_sizet            m_stFileSize;               // file size
        vm_sizet            m_stPos;                    // position in current portion of file
    };

}//namespace UMC

#endif //(UMC_ENABLE_FILE_READER)

#endif /* __UMC_FIO_READER_H__ */