tconverter_fxp.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 _TCONVERT_FXP_H_
- #define _TCONVERT_FXP_H_
- /*****************************************************************************
- * Includes
- */
- #include "hxtypes.h"
- /*****************************************************************************
- * CHXTimestampConverterFXP
- */
- class CHXTimestampConverterFXP
- {
- public:
- /* will use only one of conversion types */
- typedef enum
- {
- FACTORS,
- SAMPLES
- } ConversionType;
- typedef struct
- {
- ULONG32 ulBaseHXA;
- ULONG32 ulBaseRTP;
- } ConversionFactors;
-
- /*
- * constructors/destructor
- */
- CHXTimestampConverterFXP()
- {
- ReInit(FACTORS, 1, 1);
- }
-
- /*
- * if CvtType == FACTORS, ulVal1 is HXA Factor, ulVal2 is RTP Factor
- * if CvtType == SAMPLES, ulVal1 is Sample Rate
- */
- CHXTimestampConverterFXP(ConversionType cvtType,
- UINT32 ulVal1,
- UINT32 ulVal2 = 0)
- {
- ReInit(cvtType, ulVal1, ulVal2);
- }
- CHXTimestampConverterFXP(ConversionFactors convFactors)
- {
- ReInit(FACTORS, convFactors.ulBaseHXA, convFactors.ulBaseRTP);
- }
- ~CHXTimestampConverterFXP()
- {
- ;
- }
- /*
- * reinit
- */
- /*
- * if CvtType == FACTORS, ulVal1 is HXA Factor, ulVal2 is RTP Factor
- * if CvtType == SAMPLES, ulVal1 is Sample Rate
- */
- void ReInit(ConversionType cvtType, UINT32 ulVal1, UINT32 ulVal2 = 0);
- void ReInit(ConversionFactors cvtFactors)
- {
- ReInit(FACTORS, cvtFactors.ulBaseHXA, cvtFactors.ulBaseRTP);
- }
- /*
- * assignment
- */
- CHXTimestampConverterFXP& operator=(const CHXTimestampConverterFXP& lhs);
-
- /*
- * conversions
- */
- UINT32 hxa2rtp(UINT32 ulHxaTS)
- {
- return timeConvert(ulHxaTS, m_hxaTime, m_rtpTime);
- }
- UINT32 rtp2hxa(UINT32 ulRtpTS)
- {
- return timeConvert(ulRtpTS, m_rtpTime, m_hxaTime);
- }
- UINT32 hxa2rtp_raw(UINT32 ulHxaTS)
- {
- return timeConvertRaw(ulHxaTS, m_hxaTime, m_rtpTime);
- }
- UINT32 rtp2hxa_raw(UINT32 ulRtpTS)
- {
- return timeConvertRaw(ulRtpTS, m_rtpTime, m_hxaTime);
- }
-
- /*
- * anchors
- */
- void setHXAnchor(UINT32 ulHXAnchor);
- void setRTPAnchor(UINT32 ulRTPAnchor);
- void setAnchor(UINT32 ulHXAnchor, UINT32 ulRTPAnchor);
- ULONG32 GetRTPAnchor(void)
- {
- return m_hxaTime.ulAnchor;
- }
- ULONG32 GetHXAnchor(void)
- {
- return m_hxaTime.ulAnchor;
- }
- /*
- * factors
- */
- ConversionFactors GetConversionFactors(void)
- {
- ConversionFactors convFactors = {m_hxaTime.ulBase, m_rtpTime.ulBase};
- return convFactors;
- }
- private:
- typedef struct
- {
- LONG32 lQ; // Quant - In Common Base
- LONG32 lR; // Remainder - In Native Base
- ULONG32 ulRef; // Reference (Last Time Stamp) - In Native Base
- ULONG32 ulAnchor; // Anchor (Origin value) - In Native Base
- ULONG32 ulBase; // Native Base - In Ticks per Common Base
- ULONG32 ulHalfBase; // Native Base/2 (for rounding)- In Ticks per Common Base
- } TimeCoordinate;
- ULONG32 timeConvertRaw(ULONG32 ulT1, TimeCoordinate& T1, TimeCoordinate& T2)
- {
- return (ulT1 / T1.ulBase) * T2.ulBase +
- ((ulT1 % T1.ulBase) * T2.ulBase + T1.ulHalfBase) / T1.ulBase;
- }
- ULONG32 timeConvert(ULONG32 ulT1, TimeCoordinate& T1, TimeCoordinate& T2);
- TimeCoordinate m_hxaTime;
- TimeCoordinate m_rtpTime;
- };
- #endif /* _TCONVERT_FXP_H_ */