nestbuff.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 NESTBUFF_H
#define NESTBUFF_H

// Forward declarations
class                         CHXBaseCountingObject;
typedef _INTERFACE IHXBuffer IHXBuffer;

class CHXNestedBuffer : public CHXBaseCountingObject,
                        public IHXBuffer
{
public:
    CHXNestedBuffer();
    virtual ~CHXNestedBuffer();

    // IUnknown methods
    STDMETHOD(QueryInterface)  (THIS_ REFIID riid, void** ppvObj);
    STDMETHOD_(UINT32,AddRef)  (THIS);
    STDMETHOD_(UINT32,Release) (THIS);

    // IHXBuffer methods
    STDMETHOD(Get)               (THIS_ REF(UCHAR*) pData, REF(ULONG32) ulLength);
    STDMETHOD(Set)               (THIS_ const UCHAR* pData, ULONG32 ulLength);
    STDMETHOD(SetSize)           (THIS_ ULONG32 ulLength);
    STDMETHOD_(ULONG32,GetSize)  (THIS);
    STDMETHOD_(UCHAR*,GetBuffer) (THIS);

    // CHXNestedBuffer methods
    STDMETHOD(Init)              (THIS_ IHXBuffer* pBuffer, UINT32 ulOffset, UINT32 ulSize);
    // CUnknownIMP left-over method to support
    static HX_RESULT CreateObject(CHXNestedBuffer** ppObj);
    // One-shot creation method
    static HX_RESULT CreateNestedBuffer(IHXBuffer* pBuffer, UINT32 ulOffset,
                                        UINT32 ulSize, REF(IHXBuffer*) rpNestedBuffer);
protected:
    INT32       m_lRefCount;
    IHXBuffer* m_pBuffer;
    UINT32      m_ulOffset;
    UINT32      m_ulSize;
};

#endif