blkenc.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
- 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:
- blkEnc.hpp
- Abstract:
- Block encoder, derived from CBlock
- Revision History:
- Add mpeg mode (wchen) 8-April-1996
- *************************************************************************/
- #ifndef __BLKENC_HPP_
- #define __BLKENC_HPP_
- Class CBlockEncoder : public CBlock
- {
- public:
- // Constructors
- ~CBlockEncoder ();
- CBlockEncoder (
- const CIntImage* pfiSrc, // the source data
- const CIntImage* pfiAlpha,
- const BlockNum thisBlockNum,
- const VOLMode& volmd,
- CMBMode* pmbmd, // coding mode for the current block
- CEntropyEncoderSet* pencset
- );
- // Attributes
- const Float* dctCoeff () const {return m_rgfltDCTcoef;}// unquantized DCT coefficients
- // Operations
- Void quantize (); // return the quantized block
- Void DCACPredictionAndZigzag (const CBlock* pblkencPredictor); //reset CBPY as well
- UInt encode ();
- ///////////////// implementation /////////////////
- private:
- own CIntImage* m_pfiTexture; // texture data (padded)
- CEntropyEncoderSet* m_pencset;
- own Float* m_rgfltDCTcoef; // unquantized DCT coefficients
- own CFDCT* m_pfdct;
- // Operations
- UInt encodeMPEG ();// mpeg-style encoding
- Void dct ();
- Void quantizeDCTcoef (); // quantization of DCT coeffs
- Void quantizeDCTcoefMPEG (); // mpeg2 method
- UInt sendDCTcoef ();
- UInt sendIntraDCmpeg (); //send intra-dc: mpeg2 method
- Int findVLCtableIndexOfNonLastEvent (UInt uiRun, UInt uiLevel);
- Int findVLCtableIndexOfLastEvent (UInt uiRun, UInt uiLevel);
- Int findVLCtableIndexOfIntra (Bool bIsLastRun, UInt uiRun, UInt uiLevel);
- UInt sendTCOEF ();
- UInt putBitsOfTCOEF (UInt uiRun, Int iLevel, Bool bIsLastRun);
- };
- #endif // __BLKENC_HPP_