mbenc.hpp
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:6k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*************************************************************************
- This software module was originally developed by
- Ming-Chieh Lee (mingcl@microsoft.com), Microsoft Corporation
- Wei-ge Chen (wchen@microsoft.com), Microsoft Corporation
- Bruce Lin (blin@microsoft.com), Microsoft Corporation
- Chuang Gu (chuanggu@microsoft.com), Microsoft Corporation
- (date: March, 1996)
- 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:
- MBenc.hpp
- Abstract:
- MacroBlock encoder
- Revision History:
- *************************************************************************/
- #ifndef __MBENC_HPP_
- #define __MBENC_HPP_
- Class CMacroBlockEncoder : public CMacroBlock
- {
- friend class CVOPofMBsEncoder;
- public:
- // Constructors
- ~CMacroBlockEncoder ();
- CMacroBlockEncoder (
- Time tBCounter, // B-VOP counter
- const CVOPIntYUVBA* pvopfCurr, // original VOP
- UInt indexX, // index is the indexTH macroblock of vopF
- UInt indexY, // index is the indexTH macroblock of vopF
- const VOLMode& volmd, // VOL mode
- const VOPMode& vopmd, // VOP mode
- const CVOPIntYUVBA* pvopfMRef0, // reference VOP in a previous time for motion estimation
- const CVOPIntYUVBA* pvopfMRef1, // reference VOP in a later time for motion estimation
- const CVOPIntYUVBA* pvopfRef0, // reference VOP in a previous time
- const CVOPIntYUVBA* pvopfRef1, // reference VOP in a later time
- COutBitStream* pbitstrmOut, // output bitstream
- CEntropyEncoderSet* pentrencSet // collection of entropy encoders
- );
- // Attributes
- const CVOPIntYUVBA* pvopfPred () const {return m_pvopfPred;}
- const CVOPIntYUVBA* pvopfText () const {return m_pvopfTexture;}
- const CStatistics& statistics () const {return m_stat;} // return statistics
- // Operations
- Void setPredMB (const CVOPIntYUVBA* pvopfPred); // set the predicted MB data
- Double motionEsti (
- Bool bInBoundRef1, // these data are for direct mode
- const CMBMode* pmbmdRef1 = NULL,
- const CMotionVector* rgmvRef1 = NULL,
- Time tBCounter = 0
- ); // find MV and set some of the modes
- CMotionVector motionEstiForShape (const CMotionVector& mvPredictor);
- // find MV for binary shape MB
- Void textureQuantize (); // DCT and quantize DCT coefficients
- Void zigZagScanAndIntraDCACPrediction (const CMacroBlock* pmbPredLeft,
- const CMacroBlock* pmbPredTop,
- const CMacroBlock* pmbPredLeftTop);
- Void dctTextureCoeffCompress (); // compress DCT coefficients
- Void dctAlphaCoeffCompress (); // compress DCT coefficients for gray alpha
- Void codeOverhead (Int iPart = 0, const CMBMode* pmbmdColocatedRef1 = NULL); //can be split into two parts by iPart
- Void codeMotionOverhead (const CMBMode* pmbmdColocatedRef1 = NULL);
- Void codeTextureOverhead (const CMBMode* pmbmdColocatedRef1 = NULL);
- Void codeAlphaOverhead ();
- Void decideSkipMB (); // decide whether to skip the MB
- Void setMVStat (UInt nbitsForMV) // set number of bits for MV from vopMBs
- {m_stat.nBitsMV = nbitsForMV;}
- Void addMVStat (UInt nbitsForMV) // add number of bits for MV from vopMBs
- {m_stat.nBitsMV += nbitsForMV;}
- ///////////////// implementation /////////////////
- private:
- const CVOPIntYUVBA* m_pvopfMRef0;
- const CVOPIntYUVBA* m_pvopfMRef1;
- own CVOPIntYUVBA* m_pvopfPred; // predicted MB (only for inter MB)
- own CVOPIntYUVBA* m_pvopfTexture; // texture data to be coded
- own CIntImage* m_pfiBYOrig;
- own CIntImage* m_pfiBUVOrig;
- COutBitStream* m_pbitstrmOut; // output bitstream
- CEntropyEncoderSet* m_pentrencSet;
- CEntropyEncoder* m_pentrencDCT; // collection huffman encoder
- CEntropyEncoder* m_pentrencMCBPCinter; // entropy coder for MCBPC
- CEntropyEncoder* m_pentrencMCBPCintra; // entropy coder for MCBPC
- CEntropyEncoder* m_pentrencMbTypeBVOP; // entropy coder for MBtype (BVOP)
- CStatistics m_stat;
- Double blockMatch (Bool bForward, Bool bApply8x8); // perform forward or backward block match
- Double interpolateMC () const; // compute the SAD for the interpolate mode
- Double directMC () const; // compute the SAD for the interpolate mode
- Void decideDCTMode (Double sadInter);
- Void setBlkToQuanMB (const CIntImage* pfiBlkQ, BlockNum blkNum); // overlay a quantized block to currQ
- Bool zeroMotionV (MBType mbType) const; // check whether the MV's are all zero
- Void computeDirectDeltaMV (const CMBMode* pmbmdRef1, const CMotionVector* rgmvRef1, Time tBCounter);
- Void decideCODA (); // decide the skip mode of alpha plane
- Void storeOriginalBianry (); // original shape is for texture coding
- };
- #endif // __MBENC_HPP_