umc_avi_chunk.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 87 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 __UMC_AVI_CHUNK_H__
#define __UMC_AVI_CHUNK_H__

#include "umc_avi_types.h"
#include "lockable_data_reader.h"

#define MAX_AVI_CHUNK_DEPTH (6)

namespace UMC
{

    class AVIChunk
    {
    public:
        AVIChunk();
        Status Init(LockableDataReaderRef Reader);
        Status DescendChunk(tFOURCC chnkName);
        inline Status DescendLIST(tFOURCC chnkName);
        inline Status DescendRIFF(tFOURCC chnkName);
        inline void GoChunkHead();
        Status Ascend();
        inline vm_var32 GetChunkHead();
        inline tFOURCC GetChunkFOURCC();
        inline vm_var32 GetChunkSize();
        Status GetData(vm_byte* pbBuffer, vm_var32 uiBufSize);
        static bool CmpChunkNames(const tFOURCC chnkName1, const tFOURCC chnkName2);
        Status JumpToFilePos(const vm_sizet uiFilePos);

        virtual ~AVIChunk(){}
    protected:
        Status DescendChunkList(tFOURCC chnkName, tFOURCC listName);

        class CChnkInfo
        {
        public:
            tFOURCC m_chnkName;
            vm_sizet m_stSize;
            vm_sizet m_stFilePos;
            CChnkInfo():m_chnkName(0),m_stSize(0),m_stFilePos(0){}
        };

        CChnkInfo m_ChnkStack[MAX_AVI_CHUNK_DEPTH];
        unsigned long m_ulStackPos;
        LockableDataReaderRef m_Reader;
    };

}  //  namespace UMC

UMC::Status
UMC::AVIChunk::DescendLIST(tFOURCC chnkName)
{   return DescendChunkList(AVI_FOURCC_LIST, chnkName); }

UMC::Status
UMC::AVIChunk::DescendRIFF(tFOURCC chnkName)
{   return DescendChunkList(AVI_FOURCC_RIFF, chnkName); }

void
UMC::AVIChunk::GoChunkHead()
{   m_Reader.SetPosition(m_ChnkStack[m_ulStackPos].m_stFilePos);    }

vm_var32
UMC::AVIChunk::GetChunkHead()
{   return (vm_var32)m_ChnkStack[m_ulStackPos].m_stFilePos; }

tFOURCC
UMC::AVIChunk::GetChunkFOURCC()
{   return m_ChnkStack[m_ulStackPos].m_chnkName;    }

vm_var32
UMC::AVIChunk::GetChunkSize()
{
    vm_sizet stSize = m_ChnkStack[m_ulStackPos].m_stSize;
    assert(stSize == (vm_var32)stSize);
    return (vm_var32)stSize;
}
#endif  //   __UMC_AVI_CHUNK_H__