C++ Frame::GetFparams方法代码示例

void MotionCompensator::CompensateComponent( Frame& picframe ,
        const Frame &ref1frame ,
        const Frame& ref2frame ,
        const MvData& mv_data ,
        const CompSort cs)
{
    // Set up references to pictures and references
    PicArray& pic_data_out = picframe.Data( cs );

    // Size of frame component being motion compensated

    const PicArray& ref1up = ref1frame.UpData( cs );
    const PicArray& ref2up = ref2frame.UpData( cs );

    // Set up a row of blocks which will contain the MC data, which
    // we'll add or subtract to pic_data_out
    TwoDArray<ValueType> pic_data(m_bparams.Yblen(), pic_data_out.LengthX(), 0 );

    // Factors to compensate for subsampling of chroma
    int xscale_shift = 0;
    int yscale_shift = 0;
    if ( cs != Y_COMP )
    {
        if (m_cformat == format420)
        {
            xscale_shift = 1;
            yscale_shift = 1;
        }
        else if (m_cformat == format422)
        {
            xscale_shift = 1;
            yscale_shift = 0;
        }
    }

    ImageCoords orig_pic_size(picframe.GetFparams().OrigXl(), picframe.GetFparams().OrigYl());
    if ( cs != Y_COMP )
    {
        orig_pic_size.x = picframe.GetFparams().OrigChromaXl();
        orig_pic_size.y = picframe.GetFparams().OrigChromaYl();
    }


    // Reference to the relevant DC array
    const TwoDArray<ValueType>& dcarray = mv_data.DC( cs );

    // Set up references to the vectors
    const int num_refs = picframe.GetFparams().Refs().size();
    const MvArray* mv_array1;
    const MvArray* mv_array2;
    mv_array1 = &mv_data.Vectors(1);
    if (num_refs ==2 )
        mv_array2 = &mv_data.Vectors(2);
    else
        mv_array2 = &mv_data.Vectors(1);

    ReConfig();//set all the weighting blocks up

    //Blocks are listed left to right, line by line.
    MVector mv1,mv2;
    PredMode block_mode;

    //Coords of the top-left corner of a block
    ImageCoords pos;

    //Loop for each block in the output image.
    //The CompensateBlock function will use the image pointed to by ref1up
    //and add the compensated pixels to the image pointed to by pic_data.
    size_t wgt_idx;

    int save_from_row = m_bparams.Ybsep()-m_bparams.Yoffset();

    // unpadded picture dimensions
    const int x_end_data = pic_data_out.FirstX() + std::min(pic_data_out.LengthX(), orig_pic_size.x );
    const int y_end_data = pic_data_out.FirstY() + std::min(pic_data_out.LengthY(), orig_pic_size.y );

    const int blocks_per_mb_row = m_cparams.XNumBlocks()/m_cparams.XNumMB();
    const int blocks_per_sb_row = blocks_per_mb_row>>1;

    // The picture does not contain integral number of blocks. So not all
    // blocks need to be processed. Compute the relevant blocks to be
    // processed using the original picturesize and not the padded pic size
    int y_num_blocks = NUM_USED_BLKS(orig_pic_size.y,m_bparams.Ybsep(),m_bparams.Yblen());
    int x_num_blocks = NUM_USED_BLKS(orig_pic_size.x,m_bparams.Xbsep(),m_bparams.Xblen());

    //Loop over all the block rows
    pos.y = -m_bparams.Yoffset();
    for(int yblock = 0; yblock < y_num_blocks; ++yblock)
    {
        pos.x = -m_bparams.Xoffset();
        int xincr, xb_incr = 0;
        //loop over all the blocks in a row
        for(int xblock = 0 ; xblock < x_num_blocks; xblock+=xb_incr)
        {
            int split_mode =  mv_data.MBSplit()[yblock/blocks_per_mb_row][xblock/blocks_per_mb_row];

            int blk_len_x, blk_len_y = m_bparams.Yblen();

            switch (split_mode)
            {
//.........这里部分代码省略.........

void MotionCompensator::CompensateComponent(Frame& picframe, const Frame &ref1frame, const Frame& ref2frame,
    const MvData& mv_data,const CompSort cs)
{
    // Set up references to pictures and references
    PicArray& pic_data_out = picframe.Data( cs );

    const PicArray& ref1up = ref1frame.UpData( cs );
    const PicArray& ref2up = ref2frame.UpData( cs );

    // Set up another picture which will contain the MC data, which
    // we'll add or subtract to pic_data_out
    TwoDArray<CalcValueType> pic_data(pic_data_out.LengthY(), pic_data_out.LengthX() , 0);

    // Factors to compensate for subsampling of chroma
    int xscale_factor = 1;
    int yscale_factor = 1;

    if ( cs != Y_COMP )
    {
        if (m_cformat == format420)
        {
            xscale_factor = 2;
            yscale_factor = 2;
        }
        else if (m_cformat == format422)
        {
            xscale_factor = 2;
            yscale_factor = 1;
        }
        else if (m_cformat == format411)
        {
            xscale_factor = 4;
            yscale_factor = 1;
        }

    } 

    // Reference to the relevant DC array
    const TwoDArray<ValueType>& dcarray = mv_data.DC( cs );

    // Set up references to the vectors
    const int num_refs = picframe.GetFparams().Refs().size();
    const MvArray* mv_array1; 
    const MvArray* mv_array2;
    mv_array1 = &mv_data.Vectors(1);
    if (num_refs ==2 )
        mv_array2 = &mv_data.Vectors(2);
    else
        mv_array2 = &mv_data.Vectors(1);

    ReConfig();//set all the weighting blocks up    

    //Blocks are listed left to right, line by line.
    MVector mv1,mv2;
    PredMode block_mode;
    ValueType dc;

    //Coords of the top-left corner of a block
    ImageCoords pos;

    //Loop for each block in the output image.
    //The CompensateBlock function will use the image pointed to by ref1up
    //and add the compensated pixels to the image pointed to by pic_data.
    size_t wgt_idx;

    //Loop over all the block rows

    pos.y = -m_bparams.Yoffset();
    for(int yblock = 0; yblock < m_cparams.YNumBlocks(); ++yblock)
    {
        pos.x = -m_bparams.Xoffset();
        //loop over all the blocks in a row
        for(int xblock = 0 ; xblock < m_cparams.XNumBlocks(); ++xblock)
        {

            //Decide which weights to use.
            if((xblock != 0)&&(xblock < m_cparams.XNumBlocks() - 1))
            {
                if((yblock != 0)&&(yblock < m_cparams.YNumBlocks() - 1))    
                    wgt_idx = 4;
                else if(yblock == 0) 
                    wgt_idx = 1;
                else 
                    wgt_idx= 7;
            }
            else if(xblock == 0)
            {
                if((yblock != 0)&&(yblock < m_cparams.YNumBlocks() - 1))    
                    wgt_idx = 3;
                else if(yblock == 0) 
                    wgt_idx = 0;
                else 
                    wgt_idx = 6;
            }
            else
            {
                if((yblock != 0)&&(yblock < m_cparams.YNumBlocks() - 1))    
                    wgt_idx = 5;
                else if(yblock == 0) 
                    wgt_idx = 2;
//.........这里部分代码省略.........