tconverter_fxp.h
上传用户:dangjiwu
上传日期:2013-07-19
资源大小:42019k
文件大小:6k
- /* ***** BEGIN LICENSE BLOCK *****
- * Source last modified: $Id: tconverter_fxp.h,v 1.2.36.3 2004/07/09 01:48:09 hubbe Exp $
- *
- * Portions Copyright (c) 1995-2004 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 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the current version of the RealNetworks Community
- * Source License (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.
- *
- * Alternatively, the contents of this file may be used under the
- * terms of the GNU General Public License Version 2 or later (the
- * "GPL") in which case the provisions of the GPL are applicable
- * instead of those above. If you wish to allow use of your version of
- * this file only under the terms of the GPL, and not to allow others
- * to use your version of this file under the terms of either the RPSL
- * or RCSL, indicate your decision by deleting the provisions above
- * and replace them with the notice and other provisions required by
- * the GPL. If you do not delete the provisions above, a recipient may
- * use your version of this file under the terms of any one of the
- * RPSL, the RCSL or the GPL.
- *
- * 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_ */