[Ffmpeg-cvslog] [ffmpeg]: r5417 - in /trunk: libavcodec/snow.c libavcodec/snow.h tests/ffmpeg.regression.ref tests/rotozoom.regression.ref

[Romain DEGEZ]

lorenm at natsuki.mplayerhq.hu wrote:
> Author: lorenm
> Date: Sun May 28 23:44:47 2006
> New Revision: 5417
> 
> Log:
> Snow multiple reference frames
> (bitstream is not backwards compatible, even if refs aren't used)
> +    int mx_context= av_log2(2*ABS(left->mx - top->mx)) + 16*!!b->ref;
> +    int my_context= av_log2(2*ABS(left->my - top->my)) + 16*!!b->ref;

Wow, never see that.
What does '!!' mean ?

-- 
Romain DEGEZ

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