Function GetHatFit

jni/stasm/hatdesc.cpp:53–83

}

static double GetHatFit( // args same as non CACHE version, see below
    int          x,      // in
    int          y,      // in
    const HatFit hatfit) // in
{
    const double* descbuf = NULL;       // the HAT descriptor
    // for max cache hit rate, x and y should divisible by HAT_SEARCH_RESOL
    CV_DbgAssert(x % HAT_SEARCH_RESOL == 0);
    CV_DbgAssert(y % HAT_SEARCH_RESOL == 0);
    if (TRACE_CACHE)
        ncalls_g++;
    const unsigned key(Key(x, y));
    #pragma omp critical                // prevent OpenMP concurrent access to cache_g
    {
        std::unordered_map<unsigned, VEC>:: const_iterator it(cache_g.find(key));
        if (it != cache_g.end())        // in cache?
        {
            descbuf = Buf(it->second);  // use cached descriptor
            if (TRACE_CACHE)
                nhits_g++;
        }
    }
    if (descbuf == NULL)                // descriptor not in cache?
    {
        const VEC desc(hat_g.Desc_(x, y));
        #pragma omp critical            // prevent OpenMP concurrent access to cache_g
        cache_g[key] = desc;            // remember descriptor for possible re-use
        descbuf = Buf(desc);
    }
    return hatfit(descbuf);
}

#else // not CACHE