amr_rs_itr.cpp
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上传日期:2007-06-06
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- /* ***** 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 "amr_rs_itr.h"
- #include "amr_toc.h"
- #include "amr_frame_info.h"
- AMRRobustSortingItr::AMRRobustSortingItr() :
- m_bMore(FALSE),
- m_ulFrameIndex(0),
- m_ulOffset(0),
- m_ulFrameCount(0),
- m_pFrameInfo(0)
- {}
- AMRRobustSortingItr::~AMRRobustSortingItr()
- {
- delete [] m_pFrameInfo;
- m_pFrameInfo = 0;
- }
- BOOL AMRRobustSortingItr::Init(AMRFlavor flavor, ULONG32 ulChannels,
- ULONG32 ulStartBlock, ULONG32 ulBlockInc,
- const AMRTOCInfo& tocInfo)
- {
- m_bMore = FALSE;
- m_ulFrameCount = tocInfo.EntryCount();
- m_ulFrameIndex = 0;
- m_ulOffset = 0;
- if (m_ulFrameCount)
- {
- delete [] m_pFrameInfo;
- m_pFrameInfo = new FrameInfo[m_ulFrameCount];
-
- ULONG32 ulBlockCount = m_ulFrameCount / ulChannels;
- if (m_pFrameInfo && ulBlockCount)
- {
- ULONG32 ulFrameIndex = 0;
- ULONG32 ulBlockIndex = ulStartBlock;
-
- for (ULONG32 i = 0; i < ulBlockCount; i++)
- {
- ULONG32 ulOffset = 0;
-
- for(ULONG32 j = 0; j < ulChannels; ulFrameIndex++, j++)
- {
- ULONG32 frameType = tocInfo.GetType(ulFrameIndex);
- ULONG32 ulFrameBits = CAMRFrameInfo::FrameBits(flavor,
- frameType);
- ULONG32 ulFrameBytes = 1 + ((ulFrameBits + 7) >> 3);
-
- m_pFrameInfo[ulFrameIndex].Init(ulBlockIndex, ulOffset,
- ulFrameBytes);
-
- ulOffset += ulFrameBytes;
- }
- ulBlockIndex += ulBlockInc;
- }
- m_bMore = TRUE;
- }
- }
- return m_bMore;
- }
- ULONG32 AMRRobustSortingItr::Block() const
- {
- return m_pFrameInfo[m_ulFrameIndex].Block();
- }
- ULONG32 AMRRobustSortingItr::Offset() const
- {
- return m_ulOffset + m_pFrameInfo[m_ulFrameIndex].Offset();
- }
- BOOL AMRRobustSortingItr::More() const
- {
- return m_bMore;
- }
- void AMRRobustSortingItr::Next()
- {
- if (m_bMore)
- {
- m_pFrameInfo[m_ulFrameIndex].DecSize();
- ULONG32 ulStartIdx = m_ulFrameIndex;
- IncFrameIndex();
-
- // Find the next valid index
- while((m_ulFrameIndex != ulStartIdx) &&
- (m_pFrameInfo[m_ulFrameIndex].Size() == 0))
- {
- IncFrameIndex();
- }
-
- // Determine if we have more to go
- m_bMore = (m_pFrameInfo[m_ulFrameIndex].Size() != 0);
- }
- }
- void AMRRobustSortingItr::IncFrameIndex()
- {
- m_ulFrameIndex++;
- // See if we need to loop
- if (m_ulFrameIndex >= m_ulFrameCount)
- {
- m_ulFrameIndex = 0;
- // Increment the offset since we have looped
- m_ulOffset++;
- }
- }
- AMRRobustSortingItr::FrameInfo::FrameInfo()
- {}
- void AMRRobustSortingItr::FrameInfo::Init(ULONG32 ulBlock,
- ULONG32 ulOffset,
- ULONG32 ulSize)
- {
- m_ulBlock = ulBlock;
- m_ulOffset = ulOffset;
- m_ulSize = ulSize;
- }
- ULONG32 AMRRobustSortingItr::FrameInfo::Block() const
- {
- return m_ulBlock;
- }
- ULONG32 AMRRobustSortingItr::FrameInfo::Offset() const
- {
- return m_ulOffset;
- }
- ULONG32 AMRRobustSortingItr::FrameInfo::Size() const
- {
- return m_ulSize;
- }
- void AMRRobustSortingItr::FrameInfo::DecSize()
- {
- m_ulSize--;
- }