static void h261_loop_filter_c(uint8_t *src, int stride){
    int x,y,xy,yz;
    int temp[64];
    for(x=0; x<8; x++){
        temp[x      ] = 4*src[x           ];
        temp[x + 7*8] = 4*src[x + 7*stride];
    }
    for(y=1; y<7; y++){
        for(x=0; x<8; x++){
            xy = y * stride + x;
            yz = y * 8 + x;
            temp[yz] = src[xy - stride] + 2*src[xy] + src[xy + stride];
        }
    }
    for(y=0; y<8; y++){
        src[  y*stride] = (temp[  y*8] + 2)>>2;
        src[7+y*stride] = (temp[7+y*8] + 2)>>2;
        for(x=1; x<7; x++){
            xy = y * stride + x;
            yz = y * 8 + x;
            src[xy] = (temp[yz-1] + 2*temp[yz] + temp[yz+1] + 8)>>4;
        }
    }
}
['static void h261_loop_filter_c(uint8_t *src, int stride){\n    int x,y,xy,yz;\n    int temp[64];\n    for(x=0; x<8; x++){\n        temp[x      ] = 4*src[x           ];\n        temp[x + 7*8] = 4*src[x + 7*stride];\n    }\n    for(y=1; y<7; y++){\n        for(x=0; x<8; x++){\n            xy = y * stride + x;\n            yz = y * 8 + x;\n            temp[yz] = src[xy - stride] + 2*src[xy] + src[xy + stride];\n        }\n    }\n    for(y=0; y<8; y++){\n        src[  y*stride] = (temp[  y*8] + 2)>>2;\n        src[7+y*stride] = (temp[7+y*8] + 2)>>2;\n        for(x=1; x<7; x++){\n            xy = y * stride + x;\n            yz = y * 8 + x;\n            src[xy] = (temp[yz-1] + 2*temp[yz] + temp[yz+1] + 8)>>4;\n        }\n    }\n}']