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 14 void 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 52 void 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
