BREW 中使用内存中的JPEG创建图像,该怎么处理

/*图像的每一帧都以0101 0101 1010 1010为开始的标志
*开始标志位后面的一个字节表示帧的长度
*然后是帧的内容（主体）
*帧内容（主体）后面的一个字节是校验码，由帧长度与 0x00F0 与而获得
*/
static void HandleRecvData(eMonitor * pMe)
{
    IImage * pIImage = NULL;
    IMemAStream * pIStream = NULL;
    int nFontHeight = 0;

    byte * pFrameBuffer = NULL;        //帧缓冲区
    byte * pFrame = NULL;    //帧缓冲区的指针
    byte * pBuffer = NULL;    //当前指针位置

    int nFrameIndex1; 
    int nFrameIndex2;
    int nParity = 0; //校验位的值
    int nFrameLength = 0;        //帧大小     
    int i = 0; //循环变量

    nFontHeight = IDisplay_GetFontMetrics(pMe->a.m_pIShell, AEE_FONT_NORMAL, NULL, NULL);

    //建立处理JPEG图片格式的 IImage 接口
    if (ISHELL_CreateInstance(pMe->a.m_pIShell, AEECLSID_JPEG, (void **)&pIImage) != SUCCESS)
    {
        DBGPRINTF("Create IImage fall");
        return;
    }

    //MEMCPY(pBuffer, pData, size);
    //建立处理流的 IMenAStream 接口
    if (ISHELL_CreateInstance(pMe->a.m_pIShell, AEECLSID_MEMASTREAM, (void **)&pIStream) != SUCCESS)
    {
        DBGPRINTF("Create IStream fall");
        return;
    }

    //MEMCPY(pMe->m_pbDisplayBuffer, pMe->m_pbRecvBuffer, pMe->m_nRecvSize);
    //pBufferCurrent = pMe->m_pbDisplayBuffer;
    pBuffer = pMe->m_pbRecvBuffer;

    //0101 0101 1010 1010表示一帧图片的开始，后面一个byte表示一帧画面的长度
    while (pBuffer != NULL)
    {
        nFrameIndex1 = * pBuffer;
        //nFrameIndex1 = GetHigh8Bits(* pBufferCurrent);
        nFrameIndex2 = *(++ pBuffer);
        //nFrameIndex2 = GetHigh8Bits(nFrameIndex2);
        //DBGPRINTF("Buffer Current: %x", pBufferCurrent);
        //if (nFrameIndex1 == 0x55 || nFrameIndex2 == 0xaa )
        if ( nFrameIndex2 == 0xaa )
        {
            ++ pBuffer;
            nFrameLength = * pBuffer; //获取帧的长度

            //将图片缓冲的大小设置为图片的长度
            pFrameBuffer = (byte *)MALLOC(nFrameLength * sizeof(byte));

            //从 pBuffer 的后一个位置开始，复制 nFrameLength个byte到pFrameBuffer
            pFrame = pBuffer ++;
            MEMCPY(pFrameBuffer, pFrame, nFrameLength * sizeof(byte));
            pFrame += nFrameLength; //pBuffer 指针后移 nFrameLength 个字节
            nParity = * pFrame; //获取校验位
            if ((nFrameLength & 0x00F0) == nParity)
            {
                //校验正确，显示
                DBGPRINTF("success to get new frame image, size is %d", nFrameLength);
                //格式化数据为存储流
                IMEMASTREAM_Set(pIStream, pFrameBuffer, nFrameLength, 0, FALSE);

                //把流设置为图片数据
                //IIMAGE_SetStream()函数使 IAStream 接口与 IImage 接口对象关联，以使图像数据从文件或套接字流入
                IIMAGE_SetStream(pIImage, pIStream);
                /*IIMAGE_SetStream(pIImage, pFrameBuffer);*/

                IIMAGE_Draw(pIImage, 0, nFontHeight + 10);

                IMEMASTREAM_Release(pIStream);
                //释放变量
                FREEIF(pFrameBuffer);
            }
            else
            {
                //丢弃该帧
                FREEIF(pFrameBuffer);
            }
        }
        pBuffer ++; //缓冲区指针继续往后移动
        i ++;
        /*if (i == 31)
        {
            DBGPRINTF("***%x", pBufferCurrent);
            DBGPRINTF("Find times %d", i);
            return;
        }*/
    }
    DBGPRINTF("***%x", pBuffer);
    DBGPRINTF("Find times %d", i);
}