michael@0: /*
michael@0:  *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
michael@0:  *
michael@0:  *  Use of this source code is governed by a BSD-style license
michael@0:  *  that can be found in the LICENSE file in the root of the source
michael@0:  *  tree. An additional intellectual property rights grant can be found
michael@0:  *  in the file PATENTS.  All contributing project authors may
michael@0:  *  be found in the AUTHORS file in the root of the source tree.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "blockd.h"
michael@0: 
michael@0: void vp8_setup_block_dptrs(MACROBLOCKD *x)
michael@0: {
michael@0:     int r, c;
michael@0: 
michael@0:     for (r = 0; r < 4; r++)
michael@0:     {
michael@0:         for (c = 0; c < 4; c++)
michael@0:         {
michael@0:             x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4;
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     for (r = 0; r < 2; r++)
michael@0:     {
michael@0:         for (c = 0; c < 2; c++)
michael@0:         {
michael@0:             x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4;
michael@0: 
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     for (r = 0; r < 2; r++)
michael@0:     {
michael@0:         for (c = 0; c < 2; c++)
michael@0:         {
michael@0:             x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4;
michael@0: 
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     for (r = 0; r < 25; r++)
michael@0:     {
michael@0:         x->block[r].qcoeff  = x->qcoeff  + r * 16;
michael@0:         x->block[r].dqcoeff = x->dqcoeff + r * 16;
michael@0:         x->block[r].eob     = x->eobs + r;
michael@0:     }
michael@0: }
michael@0: 
michael@0: void vp8_build_block_doffsets(MACROBLOCKD *x)
michael@0: {
michael@0:     int block;
michael@0: 
michael@0:     for (block = 0; block < 16; block++) /* y blocks */
michael@0:     {
michael@0:         x->block[block].offset =
michael@0:             (block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4;
michael@0:     }
michael@0: 
michael@0:     for (block = 16; block < 20; block++) /* U and V blocks */
michael@0:     {
michael@0:         x->block[block+4].offset =
michael@0:         x->block[block].offset =
michael@0:             ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4;
michael@0:     }
michael@0: }