2 * Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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.
14 void vp8_setup_block_dptrs(MACROBLOCKD *x)
18 for (r = 0; r < 4; r++)
20 for (c = 0; c < 4; c++)
22 x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4;
26 for (r = 0; r < 2; r++)
28 for (c = 0; c < 2; c++)
30 x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4;
35 for (r = 0; r < 2; r++)
37 for (c = 0; c < 2; c++)
39 x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4;
44 for (r = 0; r < 25; r++)
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;
52 void vp8_build_block_doffsets(MACROBLOCKD *x)
56 for (block = 0; block < 16; block++) /* y blocks */
58 x->block[block].offset =
59 (block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4;
62 for (block = 16; block < 20; block++) /* U and V blocks */
64 x->block[block+4].offset =
65 x->block[block].offset =
66 ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4;