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 #include "blockd.h" 12 vp8_setup_block_dptrs(MACROBLOCKD * x)13void vp8_setup_block_dptrs(MACROBLOCKD *x) { 14 int r, c; 15 16 for (r = 0; r < 4; ++r) { 17 for (c = 0; c < 4; ++c) { 18 x->block[r * 4 + c].predictor = x->predictor + r * 4 * 16 + c * 4; 19 } 20 } 21 22 for (r = 0; r < 2; ++r) { 23 for (c = 0; c < 2; ++c) { 24 x->block[16 + r * 2 + c].predictor = 25 x->predictor + 256 + r * 4 * 8 + c * 4; 26 } 27 } 28 29 for (r = 0; r < 2; ++r) { 30 for (c = 0; c < 2; ++c) { 31 x->block[20 + r * 2 + c].predictor = 32 x->predictor + 320 + r * 4 * 8 + c * 4; 33 } 34 } 35 36 for (r = 0; r < 25; ++r) { 37 x->block[r].qcoeff = x->qcoeff + r * 16; 38 x->block[r].dqcoeff = x->dqcoeff + r * 16; 39 x->block[r].eob = x->eobs + r; 40 } 41 } 42 vp8_build_block_doffsets(MACROBLOCKD * x)43void vp8_build_block_doffsets(MACROBLOCKD *x) { 44 int block; 45 46 for (block = 0; block < 16; ++block) /* y blocks */ 47 { 48 x->block[block].offset = 49 (block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4; 50 } 51 52 for (block = 16; block < 20; ++block) /* U and V blocks */ 53 { 54 x->block[block + 4].offset = x->block[block].offset = 55 ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4; 56 } 57 } 58