static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){ int i, mb_x, mb_y; const int nb_components=3; for(mb_y = 0; mb_y < s->mb_height; mb_y++) { for(mb_x = 0; mb_x < s->mb_width; mb_x++) { if (s->restart_interval && !s->restart_count) s->restart_count = s->restart_interval; if(mb_x==0 || mb_y==0 || s->interlaced){ for(i=0;i<nb_components;i++) { uint8_t *ptr; int n, h, v, x, y, c, j, linesize; n = s->nb_blocks[i]; c = s->comp_index[i]; h = s->h_scount[i]; v = s->v_scount[i]; x = 0; y = 0; linesize= s->linesize[c]; for(j=0; j<n; j++) { int pred; ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap if(y==0 && mb_y==0){ if(x==0 && mb_x==0){ pred= 128 << point_transform; }else{ pred= ptr[-1]; } }else{ if(x==0 && mb_x==0){ pred= ptr[-linesize]; }else{ PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); } } if (s->interlaced && s->bottom_field) ptr += linesize >> 1; *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform); if (++x == h) { x = 0; y++; } } } }else{ for(i=0;i<nb_components;i++) { uint8_t *ptr; int n, h, v, x, y, c, j, linesize; n = s->nb_blocks[i]; c = s->comp_index[i]; h = s->h_scount[i]; v = s->v_scount[i]; x = 0; y = 0; linesize= s->linesize[c]; for(j=0; j<n; j++) { int pred; ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x); //FIXME optimize this crap PREDICT(pred, ptr[-linesize-1], ptr[-linesize], ptr[-1], predictor); *ptr= pred + (mjpeg_decode_dc(s, s->dc_index[i]) << point_transform); if (++x == h) { x = 0; y++; } } } } if (s->restart_interval && !--s->restart_count) { align_get_bits(&s->gb); skip_bits(&s->gb, 16); /* skip RSTn */ } } } return 0; }
static int ljpeg_decode_yuv_scan(MJpegDecodeContext *s, int predictor, int point_transform){ int i, mb_x, mb_y; const int nb_components=3; for(mb_y = 0; mb_y < s->mb_height; mb_y++) { for(mb_x = 0; mb_x < s->mb_width; mb_x++) { if (s->restart_interval && !s->restart_count) s->restart_count = s->restart_interval; if(mb_x==0 || mb_y==0 || s->interlaced){ for(i=0;i<nb_components;i++) { uint8_t *ptr; int n, h, v, x, y, c, j, linesize; n = s->nb_blocks[i]; c = s->comp_index[i]; h = s->h_scount[i]; v = s->v_scount[i]; x = 0; y = 0; linesize= s->linesize[c]; for(j=0; j<n; j++) { int pred; ptr = s->picture.data[c] + (linesize * (v * mb_y + y)) + (h * mb_x + x);  