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注：问号以及未注释部分 会在x265-1.8版本内更新 

/****************************************************************************** Copyright (C) 2013 x265 project** Author: Steve Borho 
   
    ** This program is free software; you can redistribute it and/or modify* it under the terms of the GNU General Public License as published by* the Free Software Foundation; either version 2 of the License, or* (at your option) any later version.** This program is distributed in the hope that it will be useful,* but WITHOUT ANY WARRANTY; without even the implied warranty of* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the* GNU General Public License for more details.** You should have received a copy of the GNU General Public License* along with this program; if not, write to the Free Software* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02111, USA.** This program is also available under a commercial proprietary license.* For more information, contact us at license @ x265.com.*****************************************************************************/#ifndef X265_FRAMEDATA_H#define X265_FRAMEDATA_H#include "common.h"#include "slice.h"#include "cudata.h"namespace x265 {// private namespaceclass PicYuv;class JobProvider;/* Per-frame data that is used during encodes and referenced while the picture * is available for reference. A FrameData instance is attached to a Frame as it * comes out of the lookahead. Frames which are not being encoded do not have a * FrameData instance. These instances are re-used once the encoded frame has * no active references. They hold the Slice instance and the 'official' CTU * data structures. They are maintained in a free-list pool along together with * a reconstructed image PicYuv in order to conserve memory. */class FrameData{public:    Slice*         m_slice; //slice数据，在本类中会实例化    SAOParam*      m_saoParam;    x265_param*    m_param;  //配置参数    FrameData*     m_freeListNext;    PicYuv*        m_reconPic;     //重构帧数据首地址 （只是指针，指向 frame->m_reconPic）    bool           m_bHasReferences; // 表示是否有帧参考它（如果后向帧不再参考它设为false） 如果是X265_TYPE_B（不可参考B帧） 设置为false 否则为true 在新来帧计算RPS时会用到（对已经确定RPS的帧，其状态是不可靠的） /* used during DPB/RPS updates */    int            m_frameEncoderID; //当前任务的job id  /* the ID of the FrameEncoder encoding this frame */    JobProvider*   m_jobProvider;   //当前帧所在的线程位置    CUDataMemPool  m_cuMemPool;  //存储一帧CTU的全部空间    CUData*        m_picCTU;     //存储当前帧的全部CTU （空间为一帧CTU个数,在本类中会实例化）    /* Rate control data used during encode and by references */    struct RCStatCU    {        uint32_t totalBits;     /* total bits to encode this CTU */        uint32_t vbvCost;       /* sum of lowres costs for 16x16 sub-blocks */        uint32_t intraVbvCost;  /* sum of lowres intra costs for 16x16 sub-blocks */        uint64_t avgCost[4];    /* stores the avg cost of CU's in frame for each depth */        uint32_t count[4];      /* count and avgCost only used by Analysis at RD0..4 */        double   baseQp;        /* Qp of Cu set from RateControl/Vbv (only used by frame encoder) */    };        struct RCStatRow//只在FrameData类中应用    {        uint32_t numEncodedCUs; /* ctuAddr of last encoded CTU in row */        uint32_t encodedBits;   /* sum of 'totalBits' of encoded CTUs */        uint32_t satdForVbv;    //在Lookahead::getEstimatedPictureCost函数中存储每个CTU行对应所有8x8块的cost累加值 /* sum of lowres (estimated) costs for entire row */        uint32_t intraSatdForVbv;//在Lookahead::getEstimatedPictureCost函数中存储每个CTU行对应所有8x8块的intracost累加值  /* sum of lowres (estimated) intra costs for entire row */        uint32_t diagSatd;        uint32_t diagIntraSatd;        double   diagQp;        double   diagQpScale;        double   sumQpRc;        double   sumQpAq;    };    RCStatCU*      m_cuStat; //申请空间为一帧CTU个数？？？    RCStatRow*     m_rowStat;//申请空间为一帧CTU行数？？？    double         m_avgQpRc;    /* avg QP as decided by rate-control */    double         m_avgQpAq;    /* avg QP as decided by AQ in addition to rate-control */    double         m_rateFactor; /* calculated based on the Frame QP */    /** 函数功能    ：初始化    /*  调用范围    ：只在Frame::allocEncodeData函数中被调用    */    FrameData();    /** 函数功能    ：申请一帧CTU的存储空间，初始化CTU、初始化统计信息    /*  调用范围    ：只在Frame::allocEncodeData函数中被调用    * \返回值       ：申请空间成功为ture，否则为false    */    bool create(x265_param *param, const SPS& sps);    /** 函数功能    ：初始化统计信息为0    /*  调用范围    ：只在FrameData::create和Frame::reinit函数中被调用    * \返回值       ：null    */    void reinit(const SPS& sps);    /** 函数功能    ：释放内存    /*  调用范围    ：只在Frame::destroy()和DPB::~DPB()函数中被调用    */    void destroy();    /** 函数功能    ：获取在当前帧对应号的CTU       * \参数  ctuAddr： CTU在帧中的编号 */    CUData* getPicCTU(uint32_t ctuAddr) { return &m_picCTU[ctuAddr]; }};}#endif // ifndef X265_FRAMEDATA_H
   

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