x264源码分析--参数deterministic

OPT2("deterministic", "n-deterministic")

        p->b_deterministic = atobool(value);//是否允许非确定性时线程优化

默认是开启的，可以减少多线程的开销。

void x264_slicetype_analyse( x264_t *h, int intra_minigop )
{

for( framecnt = 0; framecnt < i_max_search; framecnt++ )

        frames[framecnt+1] = h->lookahead->next.list[framecnt];

}

/* Where A-F are scenes: AAAAABBCCDDEEFFFFFF
         * If each of BB ... EE are shorter than (maxp1-p0), they are
         * detected as flashes and not considered scenecuts.
         * Instead, the first F frame becomes a scenecut.
         * If the video ends before F, no frame becomes a scenecut. */
        for( int curp0 = p0; curp0 <= maxp1; curp0++ )
            if( origmaxp1 > i_max_search || (curp0 < maxp1 && scenecut_internal( h, a, frames, curp0, maxp1, 0 )) )
                /* If cur_p0 is the p0 of a scenecut, it cannot be the p1 of a scenecut. */

                    frames[curp0]->b_scenecut = 0;