shpenc.hpp
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上传日期:2007-02-02
资源大小:6116k
文件大小:3k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*************************************************************************
- This software module was originally developed by
- Wei-ge Chen (wchen@microsoft.com), Microsoft Corporation
- (April, 1997)
- in the course of development of the MPEG-4 Video (ISO/IEC 14496-2).
- This software module is an implementation of a part of one or more MPEG-4 Video tools
- as specified by the MPEG-4 Video.
- ISO/IEC gives users of the MPEG-4 Video free license to this software module or modifications
- thereof for use in hardware or software products claiming conformance to the MPEG-4 Video.
- Those intending to use this software module in hardware or software products are advised that its use may infringe existing patents.
- The original developer of this software module and his/her company,
- the subsequent editors and their companies,
- and ISO/IEC have no liability for use of this software module or modifications thereof in an implementation.
- Copyright is not released for non MPEG-4 Video conforming products.
- Microsoft retains full right to use the code for his/her own purpose,
- assign or donate the code to a third party and to inhibit third parties from using the code for non <MPEG standard> conforming products.
- This copyright notice must be included in all copies or derivative works.
- Copyright (c) 1996, 1997.
- Module Name:
- caenc.hpp
- Abstract:
- binary shape encoder with context-based arithmatic coder
- Revision History:
- *************************************************************************/
- #ifndef __SHPENC_HPP_
- #define __SHPENC_HPP_
- Class CShapeEncoder : public CShapeCodec
- {
- public:
- // Constructors
- ~CShapeEncoder ();
- CShapeEncoder(CVOPofMBsEncoder* pvmenc);
- UInt encode (Int iMB, const ShapeMode& shpmdColocatedMB);
- Bool isErrorLarge (const CIntImage* pfiCurrRecon, Int iAlphaTH);
- // Operations
- ShapeMode quantizeIntra (Int iMB, const ShapeMode& shpmdColocatedMB, Int iAlphaTH); //to be called before quantizeInter
- ShapeMode quantizeInter (Int iMB, const ShapeMode& shpmdColocatedMB, Int iAlphaTH, //assume quantizeIntra has been done
- const CIntImage* pfiPred, const CVector& vctShapeMVD, Bool bHas4MV);
- private:
- own CIntImage* m_pfiShape;
- own CIntImage* m_pfiShapeDown2;
- own CIntImage* m_pfiShapeDown4;
- UInt m_nBitsIfIntra, m_nBitsIfInter;
- Bool m_bHas4MV; //whether this MB has 4 mv (for lossy shape hack)
- CEntropyEncoderSet* m_pentenc;
- COutBitStream* m_pobstrm;
- UInt codeShapeMode (Int iMB, const ShapeMode& shpmdColocatedMB, ShapeMode shpmd = UNKNOWN, Bool bDontSendBits = FALSE);
- Void round (Int iAlphaTH); //rounding of each MB
- UInt encodeCAE (CAEScanDirection msdir = UNKNOWN_DIR, ShapeMode shpmd = UNKNOWN,
- Bool bDontSendBits = FALSE);
- UInt codeCrAndSt (Bool bDontSendBits = FALSE);
- UInt encodeMVDS (Bool bDontSendBits = FALSE);
- Bool sameBlockTranspStatus (const CIntImage* pfiSrc, const CIntImage* pfiCurrRecon); //for inter lossy shape
- Void readyCurrData ();
- }; //
- #endif