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basgroup.h：源码内容
							/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: basgroup.h,v 1.1.20.1 2004/07/09 02:05:57 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
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 * the file under the current version of the RealNetworks Community
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 * terms of the GNU General Public License Version 2 or later (the
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 * this file only under the terms of the GPL, and not to allow others
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#ifndef _BASICGROUP_H_
#define _BASICGROUP_H_
struct	IHXValues;
struct	IHXGroup;
struct	IHXGroupManager;
struct	IHXGroupSink;
struct	IHXTrack;
struct	IHXStreamSource;
class	CHXSimpleList;
class	HXBasicGroup;
class	HXBasicGroupManager;
class   HXPlayer;
class	CHXMapStringToOb;
class	HXBasicTrack;
class   HXMasterTAC;
class HXBasicTrack :  public IHXTrack
{
protected:
    LONG32		    m_lRefCount;
    HXBasicGroup*           m_pHXGroup;
    IHXValues*		    m_pValues;
    IHXValues*		    m_pValuesInRequest;
    BOOL		    m_bActive;
    virtual		    ~HXBasicTrack();
    PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
    friend class HXBasicGroup;
public:
			    HXBasicTrack(HXBasicGroup*	pHXGroup);
    UINT16		    m_uTrackIndex;
    /*
     *  IUnknown methods
     */
    STDMETHOD(QueryInterface)       (THIS_
				    REFIID riid,
				    void** ppvObj);
    STDMETHOD_(ULONG32,AddRef)      (THIS);
    STDMETHOD_(ULONG32,Release)     (THIS);
    /*
     *  IHXTrack methods
     */
    /************************************************************************
    *  Method:
    *	    IHXTrack::Begin()
    *  Purpose:
    *	    start the track
    */
    STDMETHOD(Begin)	(THIS);
    /************************************************************************
    *  Method:
    *	    IHXTrack::Pause()
    *  Purpose:
    *	    pause the track
    */
    STDMETHOD(Pause)	(THIS);
    /************************************************************************
    *  Method:
    *	    IHXTrack::Seek()
    *  Purpose:
    *	    seek the track
    */
    STDMETHOD(Seek)	(THIS_
			UINT32 ulSeekTime);
    /************************************************************************
    *  Method:
    *	    IHXTrack::Stop()
    *  Purpose:
    *	    stop the track
    */
    STDMETHOD(Stop)	(THIS);
    /************************************************************************
    *  Method:
    *	    IHXTrack::AddRepeat()
    *  Purpose:
    *	    add repeat tracks
    */
    STDMETHOD(AddRepeat)(THIS_
			IHXValues* pValues);
    /************************************************************************
    *  Method:
    *	    IHXTrack::GetTrackProperties()
    *  Purpose:
    *	    get track properties
    */
    STDMETHOD(GetTrackProperties)(THIS_
				 REF(IHXValues*) pValues,
				 REF(IHXValues*) pValuesInRequest);
    /************************************************************************
     *	Method:
     *	    IHXTrack::GetSource
     *	Purpose:
     *	    Returns the Nth source instance supported by this player.
     */
    STDMETHOD(GetSource)	(THIS_
				REF(IHXStreamSource*)	pStreamSource);
    /************************************************************************
    *  Method:
    *	    IHXTrack::SetSoundLevel()
    *  Purpose:
    *	    Set Audio Level
    */
    STDMETHOD(SetSoundLevel)(THIS_
			    UINT16 uSoundLevel);
    /************************************************************************
    *  Method:
    *	    IHXTrack::GetSoundLevel()
    *  Purpose:
    *	    Get Audio Level
    */
    STDMETHOD_(UINT16, GetSoundLevel)(THIS);
    /************************************************************************
    *  Method:
    *	    IHXTrack::BeginSoundLevelAnimation()
    *  Purpose:
    *	    notify the start of soundlevel animation
    */
    STDMETHOD(BeginSoundLevelAnimation)(THIS_
					UINT16 uSoundLevelBeginWith);
    /************************************************************************
    *  Method:
    *	    IHXTrack::EndSoundLevelAnimation()
    *  Purpose:
    *	    notify the stop of soundlevel animation
    */
    STDMETHOD(EndSoundLevelAnimation)(THIS_
				      UINT16 uSoundLevelEndWith);
    virtual HX_RESULT	SetTrackProperties(IHXValues* pValues,
				           IHXValues* pValuesInRequest);    
    virtual void        Close(void);
};
class HXBasicGroup :  public IHXGroup
{
protected:
    LONG32		    m_lRefCount;
    HXBasicGroupManager*    m_pGroupManager;
    HXPlayer*		    m_pPlayer;
    BOOL		    m_bToNotifyTrack;    
    UINT16		    m_uTrackCount;
    CHXMapLongToObj*	    m_pTrackMap;
    virtual		    ~HXBasicGroup();
    PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
    HX_RESULT       DoGetTrack(UINT16 uTrackIndex, 
                               REF(IHXValues*) pTrack, 
                               REF(IHXValues*) pTrackPropInRequest);
    HX_RESULT       DoAddTrack(IHXValues* pTrack,
                               IHXValues* pTrackPropInRequest,
                               HXBasicTrack* pHXTrack);
        
    void	    StartTrackNotification(void);
    friend class HXBasicTrack;
    friend class HXBasicGroupManager;
    friend class HXPlayer;
#if defined(HELIX_FEATURE_ADVANCEDGROUPMGR)
    friend class HXAdvancedTrack;
    friend class HXAdvancedGroupManager;
#endif /* HELIX_FEATURE_ADVANCEDGROUPMGR */
public:
    UINT16		    m_uGroupIndex;
			    HXBasicGroup(HXBasicGroupManager* pManager);
    /*
     *  IUnknown methods
     */
    STDMETHOD(QueryInterface)       (THIS_
				    REFIID riid,
				    void** ppvObj);
    STDMETHOD_(ULONG32,AddRef)      (THIS);
    STDMETHOD_(ULONG32,Release)     (THIS);
    /*
     *  IHXGroup methods
     */
    /************************************************************************
    *  Method:
    *      IHXGroup::SetGroupProperties
    *  Purpose:
    *		Set any group specific information like Title Author 
    *		Copyright etc. 
    */
    STDMETHOD(SetGroupProperties)   (THIS_
				     IHXValues*  /*IN*/ pProperties);
    /************************************************************************
    *  Method:
    *      IHXGroup::GetGroupProperties
    *  Purpose:
    *		Get any group specific information. May return NULL.
    */
    STDMETHOD_(IHXValues*, GetGroupProperties)   (THIS);
    /************************************************************************
    *  Method:
    *      IHXGroup::GetTrackCount
    *  Purpose:
    *		Get the number of tracks within this group.
    */
    STDMETHOD_(UINT16,GetTrackCount)    (THIS);
    /************************************************************************
    *  Method:
    *      IHXGroup::GetTrack
    *  Purpose:
    *		Call this to hook audio data after all audio streams in this
    *		have been mixed.
    */
    STDMETHOD(GetTrack)	(THIS_
			UINT16 	    /*IN*/ uTrackIndex,
			REF(IHXValues*)  /*OUT*/ pTrack);
    /************************************************************************
    *  Method:
    *      IHXGroup::AddTrack
    *  Purpose:
    *		Add Tracks to the group.
    */
    STDMETHOD(AddTrack)	(THIS_
			IHXValues*	/*IN*/ pTrack);
    /************************************************************************
    *  Method:
    *      IHXGroup::RemoveTrack
    *  Purpose:
    *		Remove an already added track
    */
    STDMETHOD(RemoveTrack)  (THIS_
			    UINT16	/*IN*/ uTrackIndex);
    /* Other public fuctions */
    virtual HX_RESULT	CurrentGroupSet(void);
    virtual void	Close(void);
};
class HXBasicGroupManager : public IHXGroupManager,
			    public IHXPreCacheGroupMgr
{
protected:
    LONG32		m_lRefCount;
    CHXMapLongToObj*	m_pGroupMap;
    CHXSimpleList*	m_pSinkList;
    IHXValues*		m_pPresentationProperties;
    
    // required for precache support
    UINT16	    m_uGroupCount;
    UINT16	    m_uCurrentGroup;
    UINT16 	    m_uNextGroup;
    BOOL 	    m_bDefaultNextGroup;
    BOOL	    m_bCurrentGroupInitialized;
    HXPlayer*	    m_pPlayer;
    virtual	    ~HXBasicGroupManager();
    PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
    HX_RESULT	    TrackAdded	(UINT16 uGroupIndex, UINT16 uTrackIndex, IHXValues* pTrack);
    HX_RESULT	    TrackRemoved(UINT16 uGroupIndex, UINT16 uTrackIndex, IHXValues* pTrack);
    void 	    RemoveAllGroup(void);
    friend class HXBasicGroup;
    friend class HXPlayer;
#if defined(HELIX_FEATURE_ADVANCEDGROUPMGR)
    friend class HXAdvancedGroup;
#endif /* HELIX_FEATURE_ADVANCEDGROUPMGR */
public:
		    HXBasicGroupManager(HXPlayer* pPlayer = NULL);
    /*
     *  IUnknown methods
     */
    STDMETHOD(QueryInterface)       (THIS_
				    REFIID riid,
				    void** ppvObj);
    STDMETHOD_(ULONG32,AddRef)      (THIS);
    STDMETHOD_(ULONG32,Release)     (THIS);
    /*
     *  IHXGroupManager methods
     */
    /************************************************************************
    *  Method:
    *      IHXGroupManager::CreateGroup
    *  Purpose:
    *		Create a group
    */
    STDMETHOD(CreateGroup)    (REF(IHXGroup*) pGroup);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::GetGroupCount
    *  Purpose:
    *		Get the number of groups within the presentation.
    */
    STDMETHOD_(UINT16,GetGroupCount)    (THIS);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::GetGroup
    *  Purpose:
    *		Get ith group in the presentation
    */
    STDMETHOD(GetGroup)	(THIS_
			UINT16 		  /*IN*/  uGroupIndex,
			REF(IHXGroup*)  /*OUT*/ pGroup);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::SetCurrentGroup
    *  Purpose:
    *		Play this group in the presentation.
    */
    STDMETHOD(SetCurrentGroup)	(THIS_
				UINT16 	    /*IN*/ uGroupIndex);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::GetCurrentGroup
    *  Purpose:
    *		Get current group index
    */
    STDMETHOD(GetCurrentGroup)	(THIS_
				REF(UINT16) /*OUT*/ uGroupIndex);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::AddGroup
    *  Purpose:
    *		Add a group to the presentation.
    */
    STDMETHOD(AddGroup)	(THIS_
			IHXGroup*	    /*IN*/ pGroup);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::RemoveGroup
    *  Purpose:
    *		Remove an already added group
    */
    STDMETHOD(RemoveGroup)  (THIS_
			    UINT16 	/*IN*/ uGroupIndex);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::AddSink
    *  Purpose:
    *		Add a sink to get notifications about any tracks or groups
    *		being added to the presentation.
    */
    STDMETHOD(AddSink)	(THIS_
			IHXGroupSink* /*IN*/ pGroupSink);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::RemoveSink
    *  Purpose:
    *		Remove Sink
    */
    STDMETHOD(RemoveSink)   (THIS_
			    IHXGroupSink* /*IN*/ pGroupSink);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::SetPresentationProperties
    *  Purpose:
    *		Set any presentation information like Title Author 
    *		Copyright etc. 
    */
    STDMETHOD(SetPresentationProperties)   (THIS_
					    IHXValues*  /*IN*/ pProperties);
    /************************************************************************
    *  Method:
    *      IHXGroupManager::GetPresentationProperties
    *  Purpose:
    *		Get any presentation information. May return NULL.
    */
    STDMETHOD_(IHXValues*, GetPresentationProperties)   (THIS);
    /************************************************************************
    *  Method:
    *      IHXPreCacheGroupMgr::SetNextGroup
    *  Purpose:
    *		Play this as the next group in the presentation.
    */
    STDMETHOD(SetNextGroup)	(THIS_
				UINT16 	    /*IN*/ uGroupIndex);
                
    /************************************************************************
    *  Method:
    *      IHXPreCacheGroupMgr::GetNextGroup
    *  Purpose:
    *		Get the next group to be played in the presentation.
    */
    STDMETHOD(GetNextGroup)	(THIS_ REF(UINT16) uGroupIndex);
    /************************************************************************
    *  Method:
    *      IHXPreCacheGroupMgr::DefaultNextGroup
    *  Purpose:
    *		Reset to default the next group to play in the presentation.
    */
    STDMETHOD(DefaultNextGroup)	(THIS);
    virtual void	    SetMasterTAC(HXMasterTAC* pMasterTAC);
    virtual HX_RESULT	    TrackStarted(UINT16 uGroupIndex, UINT16 uTrackIndex);
    virtual HX_RESULT	    TrackStopped(UINT16 uGroupIndex, UINT16 uTrackIndex);
    virtual void	    PersistentComponentAdded(UINT16 uGroupIndex, UINT16 uTrackIndex);
    virtual void	    PersistentComponentRemoved(UINT16 uGroupIndex, UINT16 uTrackIndex);
    virtual HX_RESULT	    InsertGroupAt(UINT16 uGroupIndex, IHXGroup* pGroup);
    virtual void            Close(void);
};
#endif /*_BASICGROUP_H_*/

						