timebuff.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:8k
- /* ***** 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 ***** */
- #include "hxtypes.h"
- #include "hxresult.h"
- #include "hxcom.h"
- #include "ihxpckts.h"
- #include "hxtbuf.h"
- #include "chxpckts.h"
- #include "timebuff.h"
- #include "hxheap.h"
- #ifdef _DEBUG
- #undef HX_THIS_FILE
- static const char HX_THIS_FILE[] = __FILE__;
- #endif
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::QueryInterface
- // Purpose:
- // Implement this to export the interfaces supported by your
- // object.
- //
- STDMETHODIMP CHXTimeStampedBuffer::QueryInterface(REFIID riid, void** ppvObj)
- {
- QInterfaceList qiList[] =
- {
- { GET_IIDHANDLE(IID_IUnknown), this },
- { GET_IIDHANDLE(IID_IHXBuffer), (IHXBuffer*) this },
- { GET_IIDHANDLE(IID_IHXTimeStampedBuffer), (IHXTimeStampedBuffer*) this },
- };
- return QIFind(qiList, QILISTSIZE(qiList), riid, ppvObj);
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::AddRef
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32) CHXTimeStampedBuffer::AddRef()
- {
- return InterlockedIncrement(&m_lRefCount);
- }
- /////////////////////////////////////////////////////////////////////////
- // Method:
- // IUnknown::Release
- // Purpose:
- // Everyone usually implements this the same... feel free to use
- // this implementation.
- //
- STDMETHODIMP_(ULONG32) CHXTimeStampedBuffer::Release()
- {
- if (InterlockedDecrement(&m_lRefCount) > 0)
- {
- return m_lRefCount;
- }
- delete this;
- return 0;
- }
- STDMETHODIMP_(UINT32) CHXTimeStampedBuffer::GetTimeStamp()
- {
- return m_ulTimeStamp;
- }
- STDMETHODIMP
- CHXTimeStampedBuffer::SetTimeStamp(UINT32 ulTimeStamp)
- {
- m_ulTimeStamp = ulTimeStamp;
- return HXR_OK;
- }
- CHXTimeStampedBuffer::~CHXTimeStampedBuffer()
- {
- if (m_pData)
- {
- delete [] m_pData;
- }
- }
- /*
- * IHXBuffer methods
- */
- /************************************************************************
- * Method:
- * IHXBuffer::Get
- * Purpose:
- * TBD
- */
- STDMETHODIMP CHXTimeStampedBuffer::Get
- (
- REF(UCHAR*) pData,
- REF(ULONG32) ulLength
- )
- {
- // Whenever a COM object is returned out of an
- // interface, it should be AddRef()'d. But this is
- // not a COM object, it is only a buffer...
- pData = m_pData;
- ulLength = m_ulLength;
- return HXR_OK;
- }
- /************************************************************************
- * Method:
- * IHXBuffer::Set
- * Purpose:
- * TBD
- */
- STDMETHODIMP CHXTimeStampedBuffer::Set
- (
- const UCHAR* pData,
- ULONG32 ulLength
- )
- {
- /* We allow changing the packet info when it is owned
- * by atmost one user.
- */
- if (m_lRefCount > 1)
- {
- return HXR_UNEXPECTED;
- }
- if (m_pData)
- {
- delete [] m_pData;
- }
- m_pData = new UCHAR[ulLength];
- if (!m_pData)
- {
- return HXR_OUTOFMEMORY;
- }
- memcpy(m_pData,pData,HX_SAFESIZE_T(ulLength)); /* Flawfinder: ignore */
- m_ulLength = ulLength;
- return HXR_OK;
- }
- /************************************************************************
- * Method:
- * IHXBuffer::SetSize
- * Purpose:
- * TBD
- */
- STDMETHODIMP CHXTimeStampedBuffer::SetSize(ULONG32 ulLength)
- {
- /* We allow changing the packet info when it is owned
- * by atmost one user.
- */
- if (m_lRefCount > 1)
- {
- return HXR_UNEXPECTED;
- }
- if (ulLength > m_ulLength)
- {
- UCHAR* pTemp = NULL;
- if (m_pData)
- {
- pTemp = m_pData;
- }
- m_pData = new UCHAR[ulLength];
- if (!m_pData)
- {
- m_pData = pTemp;
- return HXR_OUTOFMEMORY;
- }
- if (pTemp)
- {
- memcpy(m_pData,pTemp,HX_SAFESIZE_T(m_ulLength)); /* Flawfinder: ignore */
- delete [] pTemp;
- }
- }
- m_ulLength = ulLength;
- return HXR_OK;
- }
- /************************************************************************
- * Method:
- * IHXBuffer::GetSize
- * Purpose:
- * TBD
- */
- STDMETHODIMP_(ULONG32) CHXTimeStampedBuffer::GetSize()
- {
- return m_ulLength;
- }
- /************************************************************************
- * Method:
- * IHXBuffer::GetBuffer
- * Purpose:
- * TBD
- */
- STDMETHODIMP_(UCHAR*) CHXTimeStampedBuffer::GetBuffer()
- {
- // Whenever a COM object is returned out of an
- // interface, it should be AddRef()'d. But this is
- // not a COM object, it is only a buffer...
- return m_pData;
- }
- void
- CHXTimeStampedBuffer::Pack(IHXTimeStampedBuffer* pTimeStampedBuffer, char* pData,
- UINT32 ulDataBufSize, UINT32& ulSize)
- {
- UINT32 ulValue = 0;
- UINT32 ulBufferSize = 0;
- IHXBuffer* pBuffer = NULL;
- if (!pTimeStampedBuffer)
- {
- goto cleanup;
- }
- if (HXR_OK != pTimeStampedBuffer->QueryInterface(IID_IHXBuffer, (void**)&pBuffer))
- {
- goto cleanup;
- }
- ulValue = pTimeStampedBuffer->GetTimeStamp();
- ulBufferSize = pBuffer->GetSize();
- // figure out the size
- if (!pData)
- {
- ulSize = sizeof(UINT32) + ulBufferSize;
- }
- // pack the data
- else
- {
- if (ulDataBufSize >= 4)
- {
- *pData++ = (BYTE) ulValue;
- *pData++ = (BYTE)(ulValue >> 8);
- *pData++ = (BYTE)(ulValue >> 16);
- *pData++ = (BYTE)(ulValue >> 24);
- ulSize += 4;
- }
- if (ulBufferSize <= ulDataBufSize - 4)
- {
- memcpy(pData, (char*)pBuffer->GetBuffer(), ulBufferSize); /* Flawfinder: ignore */
- pData += ulBufferSize;
- ulSize += ulBufferSize;
- }
- }
-
- cleanup:
- HX_RELEASE(pBuffer);
- return;
- }
-
- void
- CHXTimeStampedBuffer::UnPack(IHXTimeStampedBuffer*& pTimeStampedBuffer, char* pData, UINT32 ulSize)
- {
- UINT32 ulValue = 0;
- IHXBuffer* pBuffer = NULL;
- pTimeStampedBuffer = NULL;
- if (!pData || !ulSize)
- {
- goto cleanup;
- }
- ulValue = (BYTE)*pData++; ulValue |= (((BYTE)*pData++) << 8);
- ulValue |= (((BYTE)*pData++) << 16); ulValue |= (((BYTE)*pData++) << 24);
- ulSize -= 4;
- if (ulSize)
- {
- pTimeStampedBuffer = new CHXTimeStampedBuffer();
- pTimeStampedBuffer->AddRef();
-
- pTimeStampedBuffer->SetTimeStamp(ulValue);
- pTimeStampedBuffer->QueryInterface(IID_IHXBuffer, (void**)&pBuffer);
- pBuffer->Set((const UCHAR*)pData, ulSize);
- }
-
- cleanup:
- HX_RELEASE(pBuffer);
- return;
- }