fileindextable.cpp
上传用户:zhongxx05
上传日期:2007-06-06
资源大小:33641k
文件大小:10k
- /* ***** 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 ***** */
- /****************************************************************************
- * Defines
- */
- /****************************************************************************
- * Includes
- */
- #include "hxresult.h"
- #include "fileindextable.h"
- /****************************************************************************
- * Class CFileIndexTable
- */
- /****************************************************************************
- * Constructor/Destructor
- */
- CFileIndexTable::CFileIndexTable(void)
- : m_uNumStreams(0)
- , m_pStreamIndexTable(NULL)
- {
- ;
- }
- CFileIndexTable::~CFileIndexTable()
- {
- _Close();
- }
- /****************************************************************************
- * Main Interface
- */
- /****************************************************************************
- * Init
- */
- HX_RESULT CFileIndexTable::Init(UINT16 uNumStreams,
- UINT32 ulTimeGranularity,
- UINT32 ulMaxEntries,
- BOOL bUseAuxData)
- {
- UINT32 ulIdx;
- HX_RESULT retVal = HXR_OK;
- _Close();
- m_uNumStreams = uNumStreams;
- if (m_uNumStreams != 0)
- {
- m_pStreamIndexTable = new CStreamIndexTable [m_uNumStreams];
- retVal = HXR_OUTOFMEMORY;
- if (m_pStreamIndexTable)
- {
- retVal = HXR_OK;
- }
- }
- for (ulIdx = 0; SUCCEEDED(retVal) && (ulIdx < uNumStreams); ulIdx++)
- {
- retVal = m_pStreamIndexTable[ulIdx].Init(ulTimeGranularity,
- ulMaxEntries,
- bUseAuxData);
- }
-
- return retVal;
- }
- /****************************************************************************
- * SetIndex
- */
- HX_RESULT CFileIndexTable::SetIndex(UINT16 uStreamNumber,
- UINT32 ulTime,
- UINT32 ulOffset,
- void* pAuxData)
- {
- if (uStreamNumber >= m_uNumStreams)
- {
- return HXR_FAIL;
- }
- return m_pStreamIndexTable[uStreamNumber].SetIndex(ulTime,
- ulOffset,
- pAuxData);
- }
- /****************************************************************************
- * GetIndex
- */
- HX_RESULT CFileIndexTable::GetIndex(UINT16 uStreamNumber,
- UINT32& ulTime,
- UINT32& ulOffset,
- void** ppAuxData)
- {
- if (uStreamNumber >= m_uNumStreams)
- {
- return HXR_FAIL;
- }
- return m_pStreamIndexTable[uStreamNumber].GetIndex(ulTime,
- ulOffset,
- ppAuxData);
- }
- /****************************************************************************
- * HasIndex
- */
- BOOL CFileIndexTable::HasIndex(UINT16 uStreamNumber,
- UINT32 ulTime)
- {
- if (uStreamNumber >= m_uNumStreams)
- {
- return FALSE;
- }
- return m_pStreamIndexTable[uStreamNumber].HasIndex(ulTime);
- }
- /****************************************************************************
- * UpdateGranularity
- */
- void CFileIndexTable::UpdateGranularity(UINT32 ulTimeGranularity)
- {
- UINT16 ulIdx;
- for (ulIdx = 0; ulIdx < m_uNumStreams; ulIdx++)
- {
- m_pStreamIndexTable[ulIdx].UpdateGranularity(ulTimeGranularity);
- }
- }
- /****************************************************************************
- * UpdateTimeRange
- */
- void CFileIndexTable::UpdateTimeRange(UINT16 uStreamNumber, UINT32 ulTime)
- {
- if (uStreamNumber < m_uNumStreams)
- {
- m_pStreamIndexTable[uStreamNumber].UpdateTimeRange(ulTime);
- }
- }
- /****************************************************************************
- * Close
- */
- void CFileIndexTable::Close(void)
- {
- _Close();
- }
- /****************************************************************************
- * Private Methods
- */
- /****************************************************************************
- * _Close
- */
- void CFileIndexTable::_Close(void)
- {
- m_uNumStreams = 0;
-
- HX_VECTOR_DELETE(m_pStreamIndexTable);
- }
- /****************************************************************************
- * Class CStreamIndexTable
- */
- /****************************************************************************
- * Constructor/Destructor
- */
- CStreamIndexTable::CStreamIndexTable(void)
- : m_pIndexTable(NULL)
- , m_pAuxDataTable(NULL)
- , m_ulMaxEntries(0)
- , m_ulTimeGranulairty(0)
- , m_ulLastTime(0)
- , m_ulRangeTime(0)
- {
- ;
- }
- CStreamIndexTable::~CStreamIndexTable()
- {
- _Close();
- }
- /****************************************************************************
- * Main Interface
- */
- /****************************************************************************
- * Init
- */
- HX_RESULT CStreamIndexTable::Init(UINT32 ulTimeGranularity,
- UINT32 ulMaxEntries,
- BOOL bUseAuxData)
- {
- HX_RESULT retVal = HXR_OK;
- _Close();
- m_ulMaxEntries = ulMaxEntries;
- m_ulTimeGranulairty = ulTimeGranularity;
- if (m_ulMaxEntries != 0)
- {
- m_pIndexTable = new IndexEntry [m_ulMaxEntries];
- retVal = HXR_OUTOFMEMORY;
- if (m_pIndexTable)
- {
- retVal = HXR_OK;
- }
-
- if (SUCCEEDED(retVal) && bUseAuxData)
- {
- m_pAuxDataTable = new void* [m_ulMaxEntries];
- retVal = HXR_OUTOFMEMORY;
- if (m_pAuxDataTable)
- {
- retVal = HXR_OK;
- }
- }
- }
- return retVal;
- }
- /****************************************************************************
- * SetIndex
- */
- HX_RESULT CStreamIndexTable::SetIndex(UINT32 ulTime,
- UINT32 ulOffset,
- void* pAuxData)
- {
- HX_RESULT retVal = HXR_FAIL;
- if (m_ulNumEntries >= m_ulMaxEntries)
- {
- return HXR_FAIL;
- }
- if ((m_ulNumEntries == 0) ||
- ((ulTime > m_ulLastTime) &&
- ((ulTime - m_ulLastTime) >= m_ulTimeGranulairty)))
- {
- m_ulLastTime = ulTime;
- if (m_ulLastTime > m_ulRangeTime)
- {
- m_ulRangeTime = m_ulLastTime;
- }
- m_pIndexTable[m_ulNumEntries].m_ulTime = ulTime;
- m_pIndexTable[m_ulNumEntries].m_ulOffset = ulOffset;
- if (m_pAuxDataTable)
- {
- m_pAuxDataTable[m_ulNumEntries] = pAuxData;
- }
- m_ulNumEntries++;
- retVal = HXR_OK;
- }
- return retVal;
- }
- /****************************************************************************
- * GetIndex
- */
- HX_RESULT CStreamIndexTable::GetIndex(UINT32& ulTime,
- UINT32& ulOffset,
- void** ppAuxData)
- {
- HX_RESULT retVal = HXR_OK;
- ULONG32 ulTargetTime = ulTime;
- ULONG32 ulTableIdx;
-
- // Estimate Table Index to search from
- ulTableIdx = ulTargetTime / m_ulTimeGranulairty;
- if (m_ulNumEntries == 0)
- {
- retVal = HXR_FAIL;
- }
- if (ulTableIdx >= m_ulNumEntries)
- {
- ulTableIdx = m_ulNumEntries - 1;
- }
- // Scan Forward
- while (((ulTableIdx + 1) < (m_ulNumEntries - 1)) &&
- (m_pIndexTable[ulTableIdx + 1].m_ulTime < ulTargetTime))
- {
- ulTableIdx++;
- }
- // Scan Backwards
- while ((ulTableIdx > 0) &&
- (m_pIndexTable[ulTableIdx].m_ulTime > ulTargetTime))
- {
- ulTableIdx--;
- }
- // Report results
- ulTime = m_pIndexTable[ulTableIdx].m_ulTime;
- ulOffset = m_pIndexTable[ulTableIdx].m_ulOffset;
- if (m_pAuxDataTable)
- {
- if (ppAuxData)
- {
- *ppAuxData = m_pAuxDataTable[ulTableIdx];
- }
- }
-
- retVal = (m_ulRangeTime < ulTargetTime) ? HXR_AT_END : HXR_OK;
- return retVal;
- }
- /****************************************************************************
- * HasIndex
- */
- BOOL CStreamIndexTable::HasIndex(UINT32 ulTime)
- {
- return (ulTime <= m_ulLastTime);
- }
- /****************************************************************************
- * UpdateGranularity
- */
- void CStreamIndexTable::UpdateGranularity(UINT32 ulTimeGranularity)
- {
- m_ulTimeGranulairty = ulTimeGranularity;
- }
- /****************************************************************************
- * UpdateTimeRange
- */
- void CStreamIndexTable::UpdateTimeRange(UINT32 ulTime)
- {
- if (m_ulRangeTime < ulTime)
- {
- m_ulRangeTime = ulTime;
- }
- }
- /****************************************************************************
- * Close
- */
- void CStreamIndexTable::Close(void)
- {
- _Close();
- }
- /****************************************************************************
- * Private Methods
- */
- /****************************************************************************
- * _Close
- */
- void CStreamIndexTable::_Close(void)
- {
- m_ulNumEntries = 0;
- m_ulMaxEntries = 0;
- m_ulLastTime = 0;
- m_ulRangeTime = 0;
-
- HX_VECTOR_DELETE(m_pIndexTable);
- HX_VECTOR_DELETE(m_pAuxDataTable);
- }