mpeg_demux.h

这是DVD中伺服部分的核心代码

/*****************************************************************************
******************************************************************************
**                                                                          **
**  Copyright (c) 2006 Videon Central, Inc.                                 **
**  All rights reserved.                                                    **
**                                                                          **
**  The computer program contained herein contains proprietary information  **
**  which is the property of Videon Central, Inc.  The program may be used  **
**  and/or copied only with the written permission of Videon Central, Inc.  **
**  or in accordance with the terms and conditions stipulated in the        **
**  agreement/contract under which the programs have been supplied.         **
**                                                                          **
******************************************************************************
*****************************************************************************/
/**
 * @file mpeg_demux.h
 *
 * MPEG Demux header file.
 *
 * $Id: mpeg_demux.h,v 1.9 2006/10/25 20:09:19 rbehe Exp $
 */

#ifndef MPEG_DEMUX_H
#define MPEG_DEMUX_H

#include "vcitypes.h"
#include "utility.h"
#include "mpgstruct.h"

/******************************************************************************
*******************************************************************************
**                                                                           **
**  MPEG Demux Defines                                                       **
**                                                                           **
*******************************************************************************
******************************************************************************/

/**
 * @def MPEG Demux Update Defines
 * @brief Flags used to update different lengths in the Demux information
 *        structure.
 */
#define UPDATE_NONE                     0x00
#define UPDATE_PDL_PHDL                 0x03
#define UPDATE_PDL                      0x01
#define UPDATE_PHDL                     0x02
#define UPDATE_SCRIDL                   0x04


/******************************************************************************
*******************************************************************************
**                                                                           **
**  MPEG Demux Enumerations                                                  **
**                                                                           **
*******************************************************************************
******************************************************************************/

/**
 * @def MPEG Demux State Enumeration
 * @brief The possible states of the MPEG1 Demux and the MPEG2 Demux.
 */
enum
{
    FIND_START_CODE = 0,
    PACK_HEADER,
    SYSTEM_HEADER,
    PADDING_STREAM,
    PRIVATE_STREAM_1,
    PRIVATE_STREAM_2,
    DATA_STREAM,
    SEND_MESSAGE,
    SKIP_STREAM,
    DEMUX_STOP,
    DEMUX_EXIT
};

/******************************************************************************
*******************************************************************************
**                                                                           **
**  MPEG Demux Information Structure Definition                              **
**                                                                           **
*******************************************************************************
******************************************************************************/

/**
 * @def DEMUXINFO
 * @brief Defines the information structure of the Demux.
 *
 * Records the information of the Demux including the state information and
 * the configuration information.
 */
typedef struct tagDemuxInfo
{
    /* Demux state */
    ULONG   ulDemuxState;

    /* Data pointers */
    BYTE    *pbData;
    BYTE    *pbPack;
    BYTE    *pbPacket;
    BYTE    *pbBypassData;

    /* Data lengths */
    ULONG   ulDataLength;
    ULONG   ulPacketDataLength;
    ULONG   ulPesHeaderDataLength;
    ULONG   ulSCRInfoDataLength;

    /* Start codes and stream IDs */
    ULONG   ulStartCode;
    BYTE    bPesID;
    BYTE    bSubID;

    /* Start of stream variables */
    BOOLEAN fSystemHeaderFound;

    /* Encryption data */
    ENCRYPTION_TYPE tDataEncryption;

    /* Synchronization data */
    ULONG   ulSCRBase;
    ULONG   ulSCRExt;
    BOOLEAN fPtsExisted;
    ULONG   ulPTS;
    BOOLEAN fDtsExisted;
    ULONG   ulDTS;

    /* Copy of current input message */
    DEMUXINPUTMESSAGE tInMessage;

    /* Local copy of the Demux configuration information */
    DEMUXCONFIGINFO tConfigInfo;

    /* Pointer to the Demux configuration information */
    DEMUXCONFIGINFO *pDynamicConfigInfo;

} DEMUXINFO;

/******************************************************************************
*******************************************************************************
**                                                                           **
**  MPEG Demux Function Prototypes                                           **
**                                                                           **
*******************************************************************************
******************************************************************************/

void MPEGFlushPayload(void);

/**
 * MPEGDemuxGetErrorCnt Function. Returns the number of demux errors.
 *
 * @param
 *    None.
 *
 * @retval
 *    ULONG ulDemuxErrorCnt - number of demux errors.
 */
ULONG MPEGDemuxGetErrorCnt( void );

/**
 * MPEG1DemuxThreadProc Function. Implements the state machine of the MPEG1
 * (System Stream) Demux.
 *
 * @param
 *    PVOID pvDemuxInfo - Demux configuration information
 *
 * @retval
 *    None.
 */
ULONG MPEG1DemuxThreadProc(PVOID pvDemuxInfo);

/**
 * MPEG2DemuxThreadProc Function. Implements the state machine of the MPEG2
 * (Program Stream) Demux.
 *
 * @param
 *    PVOID pvDemuxInfo - Demux information
 *
 * @retval
 *    None.
 */
ULONG MPEG2DemuxThreadProc(PVOID pvDemuxInfo);

#endif