[Xvid-devel] What is the RefP in SearchData struct

[A.H.C. van den Oever]

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2012/5/26 Chien Tran <chien.study at gmail.com>

> Hi everyone,
> I am doing a research about improving the Mode Decision in P frame. After
> the SearchP method is called to search for the best candidate of each
> macroblock, I want to store the pointer to the Macroblock data (Y
> component) as well as 4 pointers to 4 sub block of the MB candidate.
> Currently, I see that they are using the GetReference method to get the
> pointer to the corresponding location of previous frame based on Motion
> Vectors has found. The GetReference method contains only 3 lines of code
> but it's hard to understand what it does. Could someone please explain to
> me the code in GetReference method (about the bit shifting, etc..)? And I
> don't know what the RefP array is used for? The comment says something
> about reference pictures N, V, H... I guess the H is Horizontal, V is
> vertical, but I have no clue about what N, cU and cV are.
>
> Thanks in advance
> --
> Best wishes,
>
> Tran Xuan Chien
> University of Information Technology
> Phone: (+84) 1692 468 154
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