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bfrag.h
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Symbian

Development Platform:

Visual C++

bfrag.h：Code Content
  1. /****************************************************************************
  2.  * 
  3.  *  $Id: bfrag.h,v 1.3 2003/07/31 17:23:44 jbloedow Exp $
  4.  *
  5.  *  Copyright (C) 1995-1999 RealNetworks, Inc. All rights reserved.
  6.  *  
  7.  *  http://www.real.com/devzone
  8.  *
  9.  *  This program contains proprietary 
  10.  *  information of Progressive Networks, Inc, and is licensed
  11.  *  subject to restrictions on use and distribution.
  12.  *
  13.  *
  14.  *  Buffer Fragment Class
  15.  *
  16.  */
  18. #ifndef _BFRAG_H_
  19. #define _BFRAG_H_
  21. /****************************************************************************
  22.  *  Defines
  23.  */
  25. /****************************************************************************
  26.  *  Includes
  27.  */
  28. #include "hxtypes.h"
  29. #include "hxcom.h"
  30. #include "hxcomm.h"
  31. #include "ihxpckts.h"
  32. #include "qtffrefcounter.h"
  35. class CBufferFragmentFactory;
  38. /****************************************************************************
  39.  * 
  40.  *  Class:
  41.  * CBufferFragment
  42.  *
  43.  *  Purpose:
  44.  * Provides for containment of buffer fragments under IHXBuffer API
  45.  *
  46.  */
  47. class CBufferFragment : public IHXBuffer
  48. {
  49. public:
  50.     /*
  51.      * Constructor/Destructor
  52.      */
  53. #ifdef QTCONFIG_BFRAG_FACTORY
  54.     CBufferFragment(void)
  55. : m_pBuffer(NULL)
  56. , m_pData(NULL)
  57. , m_ulSize(0)
  58. , m_lRefCount(0)
  59. , m_pBufferFragmentFactory(NULL)
  60.     {
  61.     }
  62. #else // QTCONFIG_BFRAG_FACTORY
  63.     CBufferFragment(IHXBuffer* pBuffer,
  64.     ULONG32 ulOffset,
  65.     ULONG32 ulSize)
  66. : m_pBuffer(pBuffer)
  67. , m_ulSize(ulSize)
  68. , m_lRefCount(0)
  69.     {
  71. pBuffer->AddRef();
  72. m_pData = pBuffer->GetBuffer() + ulOffset;
  73. m_ulSize = ulSize;
  74.     }
  75. #endif // QTCONFIG_BFRAG_FACTORY
  77.     /*
  78.      * IUnknown methods
  79.      */
  80.     STDMETHOD(QueryInterface) (THIS_
  81. REFIID riid,
  82. void** ppvObj);
  84.     STDMETHOD_(ULONG32,AddRef) (THIS);
  86.     STDMETHOD_(ULONG32,Release) (THIS);
  88.     /*
  89.      * CBufferFragment methods
  90.      */
  91. #ifdef QTCONFIG_BFRAG_FACTORY
  92.     void Link (CBufferFragmentFactory* pBufferFragmentFactory);
  94.     inline void Unlink(void);
  96.     void Init (IHXBuffer* pBuffer,
  97.  ULONG32 ulOffset,
  98.  ULONG32 ulSize, 
  99.  CBufferFragmentFactory* pBufferFragmentFactory)
  100.     {
  101. if (m_pBuffer)
  102. {
  103.     m_pBuffer->Release();
  104. }
  105. Link(pBufferFragmentFactory);
  106. m_pBuffer = pBuffer;
  107. pBuffer->AddRef();
  108. m_pData = pBuffer->GetBuffer() + ulOffset;
  109. m_ulSize = ulSize;
  110.     }
  111. #endif // QTCONFIG_BFRAG_FACTORY
  113.     /*
  114.      * IHXBuffer methods
  115.      */
  116.     STDMETHOD(Get) (THIS_
  117. REF(UCHAR*) pData, 
  118. REF(ULONG32) ulLength);
  120.     STDMETHOD(Set) (THIS_
  121. const UCHAR* pData, 
  122. ULONG32 ulLength);
  124.     STDMETHOD(SetSize) (THIS_
  125. ULONG32 ulLength);
  127.     STDMETHOD_(ULONG32,GetSize) (THIS);
  129.     STDMETHOD_(UCHAR*,GetBuffer)(THIS);
  132. private:
  133.     IHXBuffer* m_pBuffer;
  134.     UINT8* m_pData;
  135.     UINT32 m_ulSize;
  136. #ifdef QTCONFIG_BFRAG_FACTORY
  137.     CBufferFragmentFactory* m_pBufferFragmentFactory;
  138. #endif // QTCONFIG_BFRAG_FACTORY
  140.     LONG32 m_lRefCount;
  142.     ~CBufferFragment();
  144.     PRIVATE_DESTRUCTORS_ARE_NOT_A_CRIME
  145. };
  147. #endif  // _BFRAG_H_