1/*
2 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11
12#include "blockd.h"
13
14void vp8_setup_block_dptrs(MACROBLOCKD *x)
15{
16    int r, c;
17
18    for (r = 0; r < 4; r++)
19    {
20        for (c = 0; c < 4; c++)
21        {
22            x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4;
23        }
24    }
25
26    for (r = 0; r < 2; r++)
27    {
28        for (c = 0; c < 2; c++)
29        {
30            x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4;
31
32        }
33    }
34
35    for (r = 0; r < 2; r++)
36    {
37        for (c = 0; c < 2; c++)
38        {
39            x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4;
40
41        }
42    }
43
44    for (r = 0; r < 25; r++)
45    {
46        x->block[r].qcoeff  = x->qcoeff  + r * 16;
47        x->block[r].dqcoeff = x->dqcoeff + r * 16;
48        x->block[r].eob     = x->eobs + r;
49    }
50}
51
52void vp8_build_block_doffsets(MACROBLOCKD *x)
53{
54    int block;
55
56    for (block = 0; block < 16; block++) /* y blocks */
57    {
58        x->block[block].offset =
59            (block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4;
60    }
61
62    for (block = 16; block < 20; block++) /* U and V blocks */
63    {
64        x->block[block+4].offset =
65        x->block[block].offset =
66            ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4;
67    }
68}
69