mp3queue.cpp
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上传日期:2007-06-06
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文件大小:6k
- /* ***** 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 "hlxclib/string.h"
- #include "mp3format.h"
- #include "mp3queue.h"
- CMp3Queue::CMp3Queue(CMp3Format* pFmt, int nEntries)
- : m_ulDataBytes(0),
- m_ulQueueSize(nEntries),
- m_ulEntries(0),
- m_ulHead(0),
- m_ulAddIndex(0),
- m_ulHeadDataRemnant(0),
- m_ulNext(0),
- m_pQueue(NULL),
- m_pFmt(pFmt)
- {
- m_pQueue = new tFrameInfo[m_ulQueueSize];
- memset(m_pQueue, 0, sizeof(tFrameInfo) * m_ulQueueSize);
- m_ulNext = m_ulHead + 1;
- }
- CMp3Queue::~CMp3Queue()
- {
- RemoveAll();
- if (m_pQueue)
- delete [] m_pQueue;
- }
- int CMp3Queue::AddEntry(IHXPacket* pPacket)
- {
- if (!pPacket)
- return -1;
- IHXBuffer *pBuf = pPacket->GetBuffer();
-
- m_pQueue[m_ulAddIndex].pPacket = pPacket;
- m_pQueue[m_ulAddIndex].pPacket->AddRef();
- m_pQueue[m_ulAddIndex].ulSize = pBuf->GetSize();
- m_pQueue[m_ulAddIndex].pBuffer = pBuf->GetBuffer();
- //m_pQueue[m_ulAddIndex].pBuffer = new UCHAR[pBuf->GetSize()];
- //memcpy(m_pQueue[m_ulAddIndex].pBuffer, pBuf->GetBuffer(), pBuf->GetSize());
-
- m_pQueue[m_ulAddIndex].ulTime = pPacket->GetTime();
- if (GenerateFrameInfo(&m_pQueue[m_ulAddIndex]))
- {
- int nOffset = m_ulAddIndex;
- if (++m_ulAddIndex >= m_ulQueueSize)
- m_ulAddIndex -= m_ulQueueSize;
- ++m_ulEntries;
- m_ulDataBytes += m_pQueue[nOffset].ulDataSize;
- return nOffset;
- }
- else
- return -1;
- }
- tFrameInfo* CMp3Queue::GetHead()
- {
- m_ulNext = m_ulHead + 1;
- if (m_ulNext >= m_ulQueueSize)
- m_ulNext -= m_ulQueueSize;
- return &m_pQueue[m_ulHead];
- }
- tFrameInfo* CMp3Queue::GetIndex(int nIndex)
- {
- return &m_pQueue[nIndex];
- }
- tFrameInfo* CMp3Queue::Next()
- {
- int nIndex = m_ulNext;
- if (++m_ulNext >= m_ulQueueSize)
- m_ulNext -= m_ulQueueSize;
- return &m_pQueue[nIndex];
- }
- void CMp3Queue::RemoveAll()
- {
- for (UINT32 i=0; i<m_ulQueueSize; i++)
- {
- HX_RELEASE(m_pQueue[i].pPacket);
- //if (m_pQueue[i].pBuffer)
- //{
- // delete [] m_pQueue[i].pBuffer;
- // m_pQueue[i].pBuffer = 0;
- //}
- }
- m_ulHead = 0;
- m_ulNext = m_ulHead + 1;
- m_ulAddIndex = m_ulHead;
- m_ulEntries = 0;
- m_ulDataBytes = 0;
- }
- void CMp3Queue::RemoveHead()
- {
- m_ulNext = m_ulHead + 1;
- HX_RELEASE(m_pQueue[m_ulHead].pPacket);
- //if (m_pQueue[m_ulHead].pBuffer)
- // delete [] m_pQueue[m_ulHead].pBuffer;
- memset(&m_pQueue[m_ulHead], 0, sizeof(m_pQueue[m_ulHead]));
- m_ulHead = m_ulNext;
- if (m_ulHead >= m_ulQueueSize)
- m_ulHead -= m_ulQueueSize;
- if (++m_ulNext >= m_ulQueueSize)
- m_ulNext -= m_ulQueueSize;
- --m_ulEntries;
- }
- UCHAR CMp3Queue::GenerateFrameInfo(tFrameInfo* pInfo)
- {
- UCHAR *pBuffer = pInfo->pBuffer;
- UINT32 ulSize = pInfo->ulSize;
- if (!pBuffer || !ulSize)
- return 0;
-
- if (m_ulHead == m_ulAddIndex)
- m_pFmt->Init(pBuffer, ulSize);
- int nFrameSize,
- nHdrSize,
- nDataOffset;
- m_pFmt->GetDataOffset(pBuffer,
- ulSize,
- nFrameSize,
- nHdrSize,
- nDataOffset);
- pInfo->pHdr = pBuffer;
- pInfo->ulHdrSize = nHdrSize;
- pInfo->pData = pBuffer + nHdrSize;
- pInfo->ulDataSize = ulSize - nHdrSize;
-
- // If main_data_begin on the head entry was greater than
- // its data, skip the remaining data in future frames.
- if (m_ulHeadDataRemnant)
- {
- int nCopy = min(m_ulHeadDataRemnant, pInfo->ulDataSize);
-
- pInfo->pData += nCopy;
- pInfo->ulDataSize -= nCopy;
- m_ulHeadDataRemnant -= nCopy;
- }
- // If this is the first frame in the queue, ensure pData points the
- // the first byte of data for this syncword.
- if (m_ulHead == m_ulAddIndex)
- {
- if ((UINT32)nDataOffset > pInfo->ulDataSize)
- {
- m_ulHeadDataRemnant = nDataOffset - pInfo->ulDataSize;
- pInfo->pData += pInfo->ulDataSize;
- pInfo->ulDataSize = 0;
- }
- else
- {
- pInfo->pData += nDataOffset;
- pInfo->ulDataSize -= nDataOffset;
- }
- }
- pInfo->ulFrameSize = nFrameSize;
- pInfo->ulOffset = nDataOffset;
- return 1;
- }