deblock_horiz_default_filter.c

<VC++视频音频开发>一书的光盘资料。

#include "postprocess_mmx.h"

INLINE void deblock_horiz_default_filter(uint8_t *v, int stride, int QP) {
	int a3_0, a3_1, a3_2, d;
	int q1, q;
	int y;


	for (y=0; y<4; y++) {

		q1 = v[4] - v[5];
		q = q1 / 2;
		if (q) {

			a3_0  = q1;
			a3_0 += a3_0 << 2;
			a3_0 = 2*(v[3]-v[6]) - a3_0;
			
			if (ABS(a3_0) < 8*QP) {
				a3_1  = v[3]-v[2];
				a3_2  = v[7]-v[8];
				a3_1 += a3_1 << 2;
				a3_2 += a3_2 << 2;
				a3_1 += (v[1]-v[4]) << 1;
				a3_2 += (v[5]-v[8]) << 1;
				d = ABS(a3_0) - MIN(ABS(a3_1), ABS(a3_2));
		
				if (d > 0) { 
					d += d<<2;
					d = (d + 32) >> 6; 
	
					if (d > 0) {

			
						if (q > 0) {
							if (a3_0 < 0) {
							
								d = d>q ? q : d;
								v[4] -= d;
								v[5] += d;
							}
						} else {
							if (a3_0 > 0) {
								//d = d>0 ? 0 : d;
								d = (-d)<q ? q : (-d);
								v[4] -= d;
								v[5] += d;
							}
						}
					}
				}
			}
		}

		#ifdef PP_SELF_CHECK
		
		#endif;

		v += stride;
	}


}