umc_avi_channel.h

来自「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」· C头文件 代码 · 共 71 行

/*//////////////////////////////////////////////////////////////////////////////
//
//                  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 __AVI_CHANNEL_H__
#define __AVI_CHANNEL_H__

#include "umc_avi_chunk.h"

namespace UMC
{
    class AVIChannel
    {
    public:
        AVIChannel();
        virtual ~AVIChannel();
        Status Init(LockableDataReaderRef Reader,
                    tFOURCC     fourccCode,
                    bool        bRecPresent);

        virtual Status ReadFrame(vm_byte* pcBuffer,
                                 const vm_var32 uiBufSize,
                                 vm_var32& ruiDataRead);
        virtual Status JumpToFrame(vm_var32 uiFrameIndex);
        virtual Status JumpToBytePos(vm_sizet& rullBytePos);
        Status JumpToFilePos(const vm_sizet uiFilePos,
                               const vm_var32 uiCurFrame,
                               const vm_sizet ullCurStreamByte);

        inline vm_var32 GetCurFrameInd();
        inline vm_sizet GetCurStreamPos();
        void            GetChunkInfo(vm_var32 uiChunkNum,
                                     vm_var32& uiPos,
                                     vm_var32& uiSize,
                                     tFOURCC& fourCC);
        inline tFOURCC  GetFourCCCode();

        void Close();

    protected:
        AVIChunk m_ChunkRdr;
        tFOURCC m_FourccCode;
        bool m_bRecPresent;
        vm_var32 m_uiCurFrame;
        vm_sizet m_ullCurStreamByte;

        Status FindNextChunk();
    };

    tFOURCC
    AVIChannel::GetFourCCCode()
    { return m_FourccCode;}

    vm_var32
    AVIChannel::GetCurFrameInd()
    {   return m_uiCurFrame - 1;    }

    vm_sizet
    AVIChannel::GetCurStreamPos()
    {   return m_ullCurStreamByte;  }

}  //  namespace UMC

#endif  //  __AVI_CHANNEL_H__