63 int left[3], top[3], topleft[3];
66 buffer[0][i]= 1 << (9 - 1);
69 for(y = 0; y <
height; y++) {
70 const int modified_predictor= y ? predictor : 1;
71 uint8_t *ptr = p->
data[0] + (linesize * y);
79 top[i]= left[i]= topleft[i]=
buffer[0][i];
81 for(x = 0; x <
width; x++) {
82 buffer[x][1] = ptr[4*x+0] - ptr[4*x+1] + 0x100;
83 buffer[x][2] = ptr[4*x+2] - ptr[4*x+1] + 0x100;
84 buffer[x][0] = (ptr[4*x+0] + 2*ptr[4*x+1] + ptr[4*x+2])>>2;
89 PREDICT(pred, topleft[i], top[i], left[i], modified_predictor);
96 diff= ((left[i] - pred + 0x100)&0x1FF) - 0x100;
110 for(mb_y = 0; mb_y < mb_height; mb_y++) {
115 for(mb_x = 0; mb_x < mb_width; mb_x++) {
116 if(mb_x==0 || mb_y==0){
119 int x, y, h,
v, linesize;
128 ptr = p->
data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x);
137 pred= ptr[-linesize];
139 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);
153 int x, y, h,
v, linesize;
162 ptr = p->
data[i] + (linesize * (v * mb_y + y)) + (h * mb_x + x);
164 PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor);