多视点编码软件(JMVM)学习

1、一、JMVM的所有工程Ø 部分工程解释DownConvertStatic file： 进行视频重新采样的工具，可以进行上下采样实验。H264AVCDecoderLibTestStatic file：解码H264AVCEncoderLibTestStatic file：编码MVCBitStreamAssemblerStatic file：把多个视点编出的264文件合成一个多视点264MVCBitStreamExtractorStatic file：从一个多视点的264文件中提取出所需要的视点的264文件PSNRStatic file：统计PSNR图1 基于Hierarchical B

2、Pictures 的多视点编码结构Ø 代码流程以编码部分为例，打开，从H264AVCEncoderLibTest.cpp中的main函数开始，其主线如下：Mbencoder.cppMbEncoder:encodeMacroblock()I帧调用了xEstimateMbIntra16()xEstimateMbIntra8()xEstimateMbIntra4()xEstimateMbPCM()B帧调用了xEstimateMbDirect()xEstimateMbDirect()调用了xCheckBestEstimation()和xCheckInterMbMode8x8()xCheckI

3、nterMbMode8x8()调用了xSetRdCost8x8InterMb()xSetRdCost8x8InterMb()调用了compensateMb()紧接着依次调用了xEstimateMb16x16 ()xEstimateMb16x8 ()xEstimateMb8x16()xEstimateMb16x16 ()调用了xCheckBestEstimation()和xCheckInterMbMode8x8()xCheckInterMbMode8x8()调用了xSetRdCost8x8InterMb()xSetRdCost8x8InterMb()调用了compensateMb()xCheck

4、BestEstimation函数的功能是查找当前最优的宏块模式再次遍历xEstimateMb8x8()在xEstimateMb8x8()中依次调用xEstimateSubMbDirect()xEstimateSubMb8x8() xEstimateSubMb8x4() xEstimateSubMb4x8()xEstimateMbPCM()ReadYuvFile.cpp ErrVal ReadYuvFile:readFrame( UChar *pLum,UChar *pCb,UChar *pCr,UInt uiBufHeight,UInt uiBufWidth,UInt uiBufStride)

5、该函数读取YUV文件的Y、U及其V分量其中每个分量的读取调用了下面的函数ErrVal ReadYuvFile:xReadPlane( UChar *pucDest, UInt uiBufHeight, UInt uiBufWidth, UInt uiBufStride, UInt uiPicHeight, UInt uiPicWidth, UInt uiStartLine, UInt uiEndLine )PicEncoder.cpp图象处理函数ErrValPicEncoder:process( PicBuffer* pcInputPicBuffer, PicBufferList& r

6、cOutputList, PicBufferList& rcUnusedList, ExtBinDataAccessorList& rcExtBinDataAccessorList )上面函数调用了图象编码函数PicEncoder:xEncodePicture( ExtBinDataAccessorList& rcExtBinDataAccessorList, RecPicBufUnit& rcRecPicBufUnit, SliceHeader& rcSliceHeader, Double dLambda, UInt& ruiBits )在图象

7、编码函数中调用了下列函数RNOK ( xGlobalDisparityEstimationMotionSkip (rcSliceHeader, rcRecPicBufUnit, cList0, cList1, gdvL0, gdvL1 ) )RNOK( m_pcSliceEncoder->encodeSlice( rcSliceHeader,rcRecPicBufUnit.getRecFrame(),rcRecPicBufUnit.getMbDataCtrl(),cList0,cList1,m_uiFrameWidthInMb,dLambda,gdvL0,gdvL1,m_uiCodedF

8、rames) )CreaterH264AVCEncoder.cpp图象处理函数ErrValCreaterH264AVCEncoder:process( ExtBinDataAccessorList& rcExtBinDataAccessorList, PicBuffer* apcOriginalPicBuffer MAX_LAYERS,PicBuffer* apcReconstructPicBuffer MAX_LAYERS, PicBufferList* apcPicBufferOutputList, PicBufferList* apcPicBufferUnusedList )H2

9、64AVCEncoderTest.cppH264AVCEncoderTest:go()函数调用了读入YUV内容的函数RNOK( m_apcReadYuvuiLayer->readFrame( *apcOriginalPicBufferuiLayer + m_auiLumOffsetuiLayer, *apcOriginalPicBufferuiLayer + m_auiCbOffset uiLayer, *apcOriginalPicBufferuiLayer + m_auiCrOffset uiLayer, m_auiHeight uiLayer, m_auiWidth uiLayer,m_auiStride uiLayer ) );对读入帧的处理函数RNOK( m_pcH264A