+static int rv34_decode_intra_macroblock(RV34DecContext *r, int8_t *intra_types)
+{
+ MpegEncContext *s = &r->s;
+ int cbp, dist;
+ int mb_pos = s->mb_x + s->mb_y * s->mb_stride;
+
+ // Calculate which neighbours are available. Maybe it's worth optimizing too.
+ memset(r->avail_cache, 0, sizeof(r->avail_cache));
+ fill_rectangle(r->avail_cache + 6, 2, 2, 4, 1, 4);
+ dist = (s->mb_x - s->resync_mb_x) + (s->mb_y - s->resync_mb_y) * s->mb_width;
+ if(s->mb_x && dist)
+ r->avail_cache[5] =
+ r->avail_cache[9] = s->current_picture_ptr->f.mb_type[mb_pos - 1];
+ if(dist >= s->mb_width)
+ r->avail_cache[2] =
+ r->avail_cache[3] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride];
+ if(((s->mb_x+1) < s->mb_width) && dist >= s->mb_width - 1)
+ r->avail_cache[4] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride + 1];
+ if(s->mb_x && dist > s->mb_width)
+ r->avail_cache[1] = s->current_picture_ptr->f.mb_type[mb_pos - s->mb_stride - 1];
+
+ s->qscale = r->si.quant;
+ cbp = rv34_decode_intra_mb_header(r, intra_types);
+ r->cbp_luma [mb_pos] = cbp;
+ r->cbp_chroma[mb_pos] = cbp >> 16;
+ r->deblock_coefs[mb_pos] = 0xFFFF;
+ s->current_picture_ptr->f.qscale_table[mb_pos] = s->qscale;
+
+ if(cbp == -1)
+ return -1;
+
+ if(r->is16){
+ rv34_output_i16x16(r, intra_types, cbp);
+ return 0;
+ }
+
+ rv34_output_intra(r, intra_types, cbp);
+ return 0;
+}
+