fileindextable.h

著名的 helix realplayer 基于手机 symbian 系统的 播放器全套源代码

/* ***** BEGIN LICENSE BLOCK ***** 
 * Version: RCSL 1.0/RPSL 1.0 
 *  
 * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved. 
 *      
 * The contents of this file, and the files included with this file, are 
 * subject to the current version of the RealNetworks Public Source License 
 * Version 1.0 (the "RPSL") available at 
 * http://www.helixcommunity.org/content/rpsl unless you have licensed 
 * the file under the RealNetworks Community Source License Version 1.0 
 * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl, 
 * in which case the RCSL will apply. You may also obtain the license terms 
 * directly from RealNetworks.  You may not use this file except in 
 * compliance with the RPSL or, if you have a valid RCSL with RealNetworks 
 * applicable to this file, the RCSL.  Please see the applicable RPSL or 
 * RCSL for the rights, obligations and limitations governing use of the 
 * contents of the file.  
 *  
 * This file is part of the Helix DNA Technology. RealNetworks is the 
 * developer of the Original Code and owns the copyrights in the portions 
 * it created. 
 *  
 * This file, and the files included with this file, is distributed and made 
 * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 
 * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES, 
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS 
 * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 
 * 
 * Technology Compatibility Kit Test Suite(s) Location: 
 *    http://www.helixcommunity.org/content/tck 
 * 
 * Contributor(s): 
 *  
 * ***** END LICENSE BLOCK ***** */ 

#ifndef _FILEINDEXTABLE_H_
#define _FILEINDEXTABLE_H_

/****************************************************************************
 *  Defines
 */
#define FILEIDXTABLE_TIME_GRANULE   15000   // in milliseconds
#define FILEIDXTABLE_MAX_ENTRIES    2048

/****************************************************************************
 *  Includes
 */
#include "hxresult.h"


/****************************************************************************
 * 
 *  Class:
 *	CStreamIndexTable
 *
 *  Purpose:
 *	Manages mapping of stream index times and file offsets
 *
 */
class CStreamIndexTable
{
public:
    /*
     *	Constructor/Destructor
     */
    CStreamIndexTable(void);

    virtual ~CStreamIndexTable();

    /*
     *	Main Interface
     */
    virtual HX_RESULT Init(UINT32 ulTimeGranularity = FILEIDXTABLE_TIME_GRANULE,
			   UINT32 ulMaxEntries = FILEIDXTABLE_MAX_ENTRIES,
			   BOOL bUseAuxData = FALSE);

    virtual HX_RESULT SetIndex(UINT32 ulTime,
			       UINT32 ulOffset,
			       void* pAuxData = NULL);

    virtual HX_RESULT GetIndex(UINT32& ulTime,		// in & out
			       UINT32& ulOffset,	// out
			       void** ppAuxData = NULL);// out

    virtual BOOL HasIndex(UINT32 ulTime);

    virtual void UpdateGranularity(UINT32 ulTimeGranularity);

    virtual void UpdateTimeRange(UINT32 ulTime);

    virtual void Close(void);


private:
    typedef struct
    {
	UINT32 m_ulTime;
	UINT32 m_ulOffset;
    } IndexEntry;

    void _Close(void);

    IndexEntry* m_pIndexTable;
    void** m_pAuxDataTable;

    UINT32 m_ulMaxEntries;
    UINT32 m_ulTimeGranulairty;
    UINT32 m_ulNumEntries;
    UINT32 m_ulLastTime;
    UINT32 m_ulRangeTime;
};


/****************************************************************************
 * 
 *  Class:
 *	CFileIndexTable
 *
 *  Purpose:
 *	Manages mapping of stream index times and file offsets
 *
 */
class CFileIndexTable
{
public:
    /*
     *	Constructor/Destructor
     */
    CFileIndexTable(void);

    virtual ~CFileIndexTable();

    /*
     *	Main Interface
     */
    virtual HX_RESULT Init(UINT16 uNumStreams,
			   UINT32 ulTimeGranularity = FILEIDXTABLE_TIME_GRANULE,
			   UINT32 ulMaxEntries = FILEIDXTABLE_MAX_ENTRIES,
			   BOOL bUseAuxData = FALSE);

    virtual HX_RESULT SetIndex(UINT16 uStreamNumber,
			       UINT32 ulTime,
			       UINT32 ulOffset,
			       void* pAuxData = NULL);

    virtual HX_RESULT GetIndex(UINT16 uStreamNumber,	// in
			       UINT32& ulTime,		// in & out
			       UINT32& ulOffset,	// out
			       void** ppAuxData = NULL);// out

    virtual BOOL HasIndex(UINT16 uStreamNumber,
			  UINT32 ulTime);

    virtual void UpdateGranularity(UINT32 ulTimeGranularity);

    virtual void UpdateTimeRange(UINT16 uStreamNumber,
				 UINT32 ulTime);

    virtual void Close(void);


private:
    void _Close(void);

    CStreamIndexTable* m_pStreamIndexTable;

    UINT16 m_uNumStreams;
};


#endif  // _FILEINDEXTABLE_H_