+ av_assert0(log2w >= 0 && log2h >= 0);
+
+ index = size2index[log2h][log2w];
+ av_assert0(index >= 0);
+
+ h = 1 << log2h;
+ code = get_vlc2(&f->gb, block_type_vlc[1 - (f->version > 1)][index].table,
+ BLOCK_TYPE_VLC_BITS, 1);
+ av_assert0(code >= 0 && code <= 6);
+
+ start = f->last_frame_buffer;
+ end = start + stride * (f->avctx->height - h + 1) - (1 << log2w);