nestbuff.h

linux下的一款播放器

/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: nestbuff.h,v 1.1.1.1.50.3 2004/07/09 01:45:51 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 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