hxsm.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: hxsm.h,v 1.6.2.1 2004/07/09 02:05:40 hubbe Exp $
 * 
 * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
 * http://www.helixcommunity.org/content/rpsl unless you have licensed
 * the file under the current version of the RealNetworks Community
 * Source License (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.
 * 
 * Alternatively, the contents of this file may be used under the
 * terms of the GNU General Public License Version 2 or later (the
 * "GPL") in which case the provisions of the GPL are applicable
 * instead of those above. If you wish to allow use of your version of
 * this file only under the terms of the GPL, and not to allow others
 * to use your version of this file under the terms of either the RPSL
 * or RCSL, indicate your decision by deleting the provisions above
 * and replace them with the notice and other provisions required by
 * the GPL. If you do not delete the provisions above, a recipient may
 * use your version of this file under the terms of any one of the
 * RPSL, the RCSL or the GPL.
 * 
 * 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 _HXSM_H_
#define _HXSM_H_

#include "hxtypes.h"
#include "hxcom.h"
#include "hxsmbw.h"
#include "hxslist.h"

class CHXSimpleList;
class ASMRuleBook;
struct IHXSourceBandwidthInfo;
struct IHXErrorMessages;

class ASMStreamInfo;
class ASMSourceInfo;
class HXSM;
struct IHXValues;

#define NUM_REPORTS_NEEDED_TO_UPSHIFT 4
#define BW_DETECTION_DATA_POINTS 1024
#define TCP_BANDWIDTH_WINDOW 20000

class ASMSourceInfo : public IHXBandwidthManagerInput
{
public:
    UINT32	m_ulLastReportTime;
    UINT32	m_ulIncomingBandwidth;
    UINT32	m_ulRateBeforeDeAccel;
    INT32	m_lTimeDiffBase;  //this must be signed !!!
    UINT32	m_ulBytesBehind;
    INT32	m_lLastBehindTime;
    UINT32	m_ulLastSetDelivery;
    UINT32	m_ulSubscribedBw;
    UINT32	m_ulMaxSubscribedBw;
    UINT32	m_ulMasterOffer;
    HX_BITFIELD	m_bBehind : 1;
    HX_BITFIELD	m_bLossBehind : 1;
    HX_BITFIELD	m_bSlightlyBehind : 1;
    HX_BITFIELD	m_bTimeStampDelivery : 1;
    HX_BITFIELD m_bPendingChill : 1;
    HX_BITFIELD m_bInvalidUpReport : 1;
    HX_BITFIELD	m_bPerfectPlay : 1;
    HX_BITFIELD m_bIsDone : 1;
    HX_BITFIELD m_bMayBeAccelerated : 1;
    HX_BITFIELD m_bTryToUpShift : 1;
    HX_BITFIELD	m_bAdjustBandwidth : 1;
    UINT32	m_ulLowestBandwidthBeforeTimeStamp;

    /*
     * The following are switches used in load testing only to control
     * whether or not any fall forward or fall back rate negotiation
     * goes on. There is a master switch, m_bDisableBothAccelDecel,
     * in the HXSM class that effects both of these swiches, globaly,
     * for ALL sources regardless of URL option switches.
     * 
     * Option switches are: "DoAccel", "DoDecel"
     *
     * NOTE: DoAccel and DoDecel control both Accelleration/Deceleration
     *       and upshifting and downshifting of SureStream sources.
     */
    HX_BITFIELD m_bSourceAccelAllowed : 1;
    HX_BITFIELD m_bSourceDecelAllowed : 1;

private:
    HX_BITFIELD m_bSlidingBwWindowReady : 1;

public:
    ASMRuleBook*    m_pMasterRuleBook;
    ASMStreamInfo** m_pStreams;
    CHXSimpleList   m_SubscriptionChanges;

    UINT32  GetBandwidthSince(UINT32 ulTime, UINT32 ulNow);
    UINT32  GetBandwidth();

    TRANSPORT_TYPE			m_TransportType;

    ASMSourceInfo(HXSource* pSource, HXSM* pHXASM);
    ~ASMSourceInfo();
    void Done();
    STDMETHOD (QueryInterface ) (THIS_ REFIID ID, void** ppInterfaceObj);
    STDMETHOD_(UINT32, AddRef ) (THIS);
    STDMETHOD_(UINT32, Release) (THIS);

    /*
     *	IHXBandwidthManagerInput methods
     */
    STDMETHOD(ReportDataPacket)		(THIS_
					UINT32 ulTimeStamp,
					UINT32 ulArrivedTimeStamp,
					UINT32 ulSize);

    STDMETHOD(ReportUpshiftInfo)	(THIS_
					UINT32 ulTimeStamp,
					UINT32 ulSize);

    STDMETHOD(ReportLatency)		(THIS_
					UINT32 ulServerTime,
					UINT32 ulClientTime);

    STDMETHOD(SetCongestionFactor)	(THIS_
					UINT32 ulFactor);

    STDMETHOD(SetTransportType)		(THIS_
					TRANSPORT_TYPE type);


    HXSource*				m_pSource;
    IHXSourceBandwidthInfo*		m_pSBI;

    /* If the source has enough data, it may tell the bandwidth
     * manager to cut down on accelerated buffering.
     */
    void    ChangeAccelerationStatus	(BOOL      bMayBeAccelerated,
					 BOOL	   bUseAccelerationFactor,
					 UINT32	   ulAccelerationFactor);

private:
    UINT32				THRESHOLD;
    INT32				m_lOuterThreshold;

    INT32				CalcBackup(UINT32, UINT32);

    INT32				m_lRefCount;

    typedef struct _BwDetectionData
    {
	UINT32	    m_ulSize;
	UINT32	    m_ulTimeStamp;
	UINT32	    m_ulATime;
    } BwDetectionData;

    
    /* For Bandwidth Detection */
    BwDetectionData*			m_pBwDetectionData;
    UINT32				m_ulBwDetectionDataLen;
    UINT32				m_ulSlidingWindowLocation;
    UINT32				m_ulBwDetectionDataCount;
    HXSM*				m_pHXASM;

private:
    BOOL				AllocBWDetectionData(UINT32 ulReqSize);
};

class ASMStreamInfo
{
public:
    BOOL				m_bTimeStampDelivery;
    void				NotifyTimeStampDelivery();
    void				NotifyLimitBandwidth(UINT32 ulBandwidth);
    void				NotifyNewBandwidth();
    void				SetLastBandwidth(UINT32 ulOffer);
    ASMStreamInfo();
    ~ASMStreamInfo();

    ASMSourceInfo*			m_pASMSourceInfo;
    IHXStreamBandwidthNegotiator*	m_pNegotiator;
    IHXStreamBandwidthBias*		m_pBias;
    IHXAtomicRuleGather*		m_pRuleGather;
    UINT32				m_ulFixedBandwidth;
    UINT32				m_ulLastBandwidth;
    float*				m_pThreshold;
    UINT32				m_ulNumThresholds;
    UINT32				m_ulThresholdPosition;
    UINT32				m_ulResistanceToLower;
    UINT32				m_ulOffer;
    UINT32				m_ulMasterRuleBookSetOffer;
    UINT32				m_ulMaxEffectiveThreshold;
    UINT32                              m_ulStreamNumber;
};

class HXSM : public IHXBandwidthManager
{
public:
    HXSM();
    ~HXSM();

    STDMETHOD (QueryInterface ) (THIS_ REFIID ID, void** ppInterfaceObj);
    STDMETHOD_(UINT32, AddRef ) (THIS);
    STDMETHOD_(UINT32, Release) (THIS);

    /*
     *	IHXBandwidthManager methods
     */
    STDMETHOD(RegisterSource)	(THIS_
				HXSource* pSource,
				IUnknown* pUnknown);

    STDMETHOD(RegisterSourcesDone)	(THIS);

    STDMETHOD_(BOOL, NotEnoughBandwidth)(THIS);

    STDMETHOD(UnRegisterSource)	(THIS_
				HXSource* pSource);

    /* If the source has enough data, it may tell the bandwidth
     * manager to cut down on accelerated buffering.
     */
    STDMETHOD(ChangeAccelerationStatus)	(THIS_
				HXSource* pSource,
				BOOL	   bMayBeAccelerated,
				BOOL	   bUseAccelerationFactor,
				UINT32	   ulAccelerationFactor);

    void UpShiftInfo(UINT32 ulTimeStamp, UINT32 ulSize);

    /* Called by HXPlayer at end of each presentation */
    STDMETHOD(PresentationDone)	(THIS);

    STDMETHOD(ChangeBW) (THIS_ 
		UINT32 newBW, HXSource* pSource);

    typedef enum { HX_NONE, CONGESTION, INIT, INIT_REDIST, REDIST, REDO_ACCEL, CHILL_BUFFERING } RState;
    RState		m_State;
private:
    INT32		m_lRefCount;
    IHXValues*		m_pSubscriptionVariables;
    CHXSimpleList*	m_pASMSourceInfo;
    CHXSimpleList*	m_pASMStreamInfo;
    UINT32		m_ulOriginalHighestBandwidthAvail;
    UINT32		m_ulHighestBandwidthAvail;
    UINT32		m_ulPeakUsedBandwidth;
    UINT32		m_ulUpShiftTimes[5];
    UINT32		m_ulUpShiftSizes[5];
    UINT32		m_ulUpShiftRingPos;
    UINT32		m_ulUpShiftBandwidthAvail;
    UINT32		m_ulNumSources;
    UINT32		m_ulMaxAccelBitRate;
    UINT32		m_ulResistanceBitRate;
    UINT32		m_ulOriginalResistanceBitRate;
    INT32		m_ulNumReportsSinceUpShift;
    UINT32		m_ulLastStableBandwidth;
    UINT32		m_ulUpShiftTestPointScaleFactor;
    UINT32		m_ulOfferToRecalc;
    UINT32		m_ulNextPacketWindow;
    INT32		m_lPacketCounter;
    UINT32		m_ulUpShiftPastResistanceCount;
    INT16		m_lLoss : 16;
    HX_BITFIELD		m_bInitialHighBwAvail : 1;
    HX_BITFIELD		m_bPipeFull : 1;
    HX_BITFIELD		m_bUpShiftInfoReady : 1;
    HX_BITFIELD		m_bDidOfferUpShiftToRecalc : 1;
    HX_BITFIELD         m_bEnableSDB : 1;

    /****************************************************************
     * The following are switches used in load testing only to control
     *  whether or not any fall forward or fall back rate negotiation
     *  goes on. The acceleration or deceleration can be controled with
     *  the m_bDoAccel and m_bDoDecel switches.  All rate changes can
     *  be turned off with the m_bDisableBothAccelDecel switch which
     *  overrides any values in the m_bDoAccel and m_bDoDecel switches.
     *  if the m_bDisableBothAccelDecel switch is FALSE(0) then it has
     *  no effect.
     * 
     * Preference Keys are:
     *                       DoAccel, DoDecel, LoadTest,
     *                       DisableBothAccelDecel
     *****************************************************************/
    BOOL    m_bLoadTest;
    BOOL    m_bDoAccel;
    BOOL    m_bDoDecel;
    BOOL    m_bDisableBothAccelDecel;
    HXFLOAT m_fAccelerationFactor;

#ifndef GOLD
    IHXErrorMessages*	m_pEM;
#endif

    void Recalc();
    void RecalcAccel();
 
    friend class ASMSourceInfo;
};

#endif  /* ifndef _HXSM_H_ */