ancillarypacket.h

完整的基于Conxant平台的USB电视棒的WIN驱动程序。

/*+++ *******************************************************************\ 
* 
*  Copyright and Disclaimer: 
*  
*     --------------------------------------------------------------- 
*     This software is provided "AS IS" without warranty of any kind, 
*     either expressed or implied, including but not limited to the 
*     implied warranties of noninfringement, merchantability and/or 
*     fitness for a particular purpose.
*     --------------------------------------------------------------- 
*   
*     Copyright (c) 2008 Conexant Systems, Inc. 
*     All rights reserved. 
*
\******************************************************************* ---*/ 
#ifndef _ANCILLARY_PACKET_H_
#define _ANCILLARY_PACKET_H_

extern "C" 
{
#include <wdm.h>
}

#include <windef.h>
#include <ks.h>
#include <ksmedia.h>


#define MAX_ANCILLARY_PACKET_BYTES 64   //Max audio packet is 23
                                        //Max teletext packet is 51 bytes

class AncillaryPacket
{
public:
    AncillaryPacket();

    DWORD submitData(PBYTE p_data, DWORD bytes_available);

    //Check if the current packet is complete
    BOOLEAN isPacketComplete();

    //Get the buffer to give to one of the parse buffer classes
    PBYTE getBuffer(PDWORD p_buffer_size);

    //Clear any part of a buffer left in the class
    VOID  clearData();

    BYTE getDataID();

protected:
    BOOLEAN verifyHeader();


private:
    BYTE   _data_buffer[MAX_ANCILLARY_PACKET_BYTES];
    DWORD  _bytes_in_buffer;
    DWORD  _bytes_expected;
};

#endif