umc_fifo_buf.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 __FIFO_BUFFER_CLASS_H__
#define __FIFO_BUFFER_CLASS_H__

#include <string.h> //  for memset function
#include "vm_debug.h"
#include "vm_types.h"
#include "umc_semaphore.h"
#include "umc_mutex.h"
#include "umc_structures.h"
#include "umc_dynamic_cast.h"

namespace UMC
{
    class FifoBuffer
    {
        DYNAMIC_CAST_DECL_BASE(FifoBuffer)
   protected:
        vm_byte* m_pcBuffers;
        vm_var32 m_uiBufSize;
        vm_var32 m_uiBufNum;
        vm_var32 m_uiHead;
        vm_var32 m_uiTail;
        vm_var32 m_uiBufInFifo;

        Semaphore m_InBufSema;
        Semaphore m_OutBufSema;
        Mutex m_AccessMut;

        bool m_bInBufLocked;
        bool m_bOutBufLocked;

        struct sFrmHdr{
            vm_var32 uiSize;
            vm_sizet ullIndex;
        };

    public:
        FifoBuffer():
            m_pcBuffers(NULL),
            m_uiBufSize(0),
            m_uiBufNum(0),
            m_uiHead(0),
            m_uiTail(0),
            m_uiBufInFifo(0),
            m_bInBufLocked(false),
            m_bOutBufLocked(false)
        {}

        ~FifoBuffer();
        Status Init( const vm_var32 uiBufSize, const vm_var32 uiBufNum );
        Status GetInBuf(vm_byte** ppucHead);
        Status ReleaseInBuf(vm_var32 uiBufSize, vm_sizet ullIndex);
        Status GetOutBuf(vm_byte** ppucTail,
                             vm_var32& ruiDataSize,
                             vm_sizet& rullIndex);
        Status ReleaseOutBuf();
        inline vm_var32 GetBufSize();
        inline vm_var32 GetFreeBufNum();
        inline vm_var32 GetFilledBufNum();
        void Close();
        Status Reset();
    };
}  //  namespace UMC

vm_var32
UMC::FifoBuffer::GetBufSize()
{    return m_uiBufSize - sizeof(vm_var32);    }

vm_var32
UMC::FifoBuffer::GetFreeBufNum()
{
    m_AccessMut.Lock();
    vm_var32 uiRes = m_uiBufNum - m_uiBufInFifo - 2;
    m_AccessMut.Unlock();
    return uiRes;
}

vm_var32
UMC::FifoBuffer::GetFilledBufNum()
{
    m_AccessMut.Lock();
    vm_var32 uiRes = m_uiBufInFifo;
    m_AccessMut.Unlock();
    return uiRes;
}

#endif    //    __FIFO_BUFFER_CLASS_H__