buffmgr.h
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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 ***** */
- #ifndef _BUFFMGR_H_
- #define _BUFFMGR_H_
- class HXSource;
- typedef enum _buffer_state
- {
- BUFFMGR_READY = 0,
- BUFFMGR_SEEK,
- BUFFMGR_REBUFFER
- } BUFFER_STATE;
- class CBufferManager
- {
- private:
- UINT32 m_ulMaxAdditionalBufferingInMs;
- UINT32 m_ulAdditionalBufferingInMs;
- INT64 m_llHighestTimeStamp;
- UINT32 m_ulTotalPauseTime;
- UINT32 m_ulLastPauseTime;
- UINT32 m_ulBufferingStartTime;
- UINT32 m_ulMinimumInitialAudioPreroll;
- UINT32 m_ulMinimumSourcePreroll;
- BUFFER_STATE m_state;
- HX_BITFIELD m_bLocalPlayback : 1;
- HX_BITFIELD m_bPerfectPlay : 1;
- HX_BITFIELD m_bPaused : 1;
- HX_BITFIELD m_bBufferStartTimeToBeSet : 1;
- HX_BITFIELD m_bFirstResumeDone : 1;
- HX_BITFIELD m_bIsSeekPerformed : 1;
-
- HX_BITFIELD m_bBufferedPlay : 1;
- HX_BITFIELD m_bBufferCalcToBeChanged : 1;
- HX_BITFIELD m_bIsInitialized : 1;
- UINT32 m_ulSeekTime;
- HXSource* m_pParent;
- CHXMapLongToObj* m_pStreamInfoTable;
- protected:
- HX_RESULT Reset(UINT32 ulSeekTime = 0, BOOL bSeekInsideRecordBuffer = FALSE);
- UINT32 GetElapsedTime(UINT32 ulCurrentTime);
- void UpdateHighestTimestamps(INT64 llActualTimeStamp,
- STREAM_INFO* pStreamInfo);
- void UpdateMinimumPreroll(BOOL bModifyStartTime);
- void SetPerfectPlay(BOOL bPerfectPlay);
- public:
- CBufferManager(HXSource* pParent);
- ~CBufferManager();
- // initialization
- HX_RESULT Init(void);
- // set minimum preroll
- HX_RESULT SetMinimumPreroll(BOOL bPerfectPlay, UINT32 ulSourcePreroll,
- UINT32 ulInitialAudioPreroll,
- BOOL bModifyStartTime = TRUE);
- // stop the buffering(i.e. reach the end of source)
- HX_RESULT Stop(void);
- // notify the seek
- HX_RESULT DoSeek(UINT32 ulSeekTime, BOOL bSeekInsideRecordBuffer = FALSE);
- // pause
- HX_RESULT DoPause(void);
- // resume
- HX_RESULT DoResume(void);
- // rebuffer
- HX_RESULT ReBuffer(void);
- // update counters
- HX_RESULT UpdateCounters(IHXPacket* pPacket);
- // get status
- HX_RESULT GetStatus(REF(UINT16) uStatusCode,
- REF(IHXBuffer*) pStatusDesc,
- REF(UINT16) uPercentDone);
- // get remain to buffer
- HX_RESULT GetRemainToBuffer(REF(UINT32) ulRemainToBufferInMs,
- REF(UINT32) ulRemainToBuffer);
- /* Get excess buffer info from Transport layer */
- HX_RESULT GetExcessBufferInfo(REF(UINT32) ulRemainToBufferInMs,
- REF(UINT32) ulRemainToBuffer,
- REF(UINT32) ulExcessBufferInMs,
- REF(UINT32) ulExcessBuffer,
- REF(BOOL) bValidInfo,
- REF(UINT32) ulActualExcessBufferInMs,
- REF(UINT32) ulActualExcessBuffer);
- // get maximum preroll
- HX_RESULT GetMaximumPreroll(REF(UINT32) ulMaximumPrerollInMs);
- void EnterBufferedPlay(void);
- void LeaveBufferedPlay(void);
- };
- #endif /* _BUFFERMGR_H_ */