127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
/*
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* Copyright (c) 2010 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "blockd.h"
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typedef enum
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{
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PRED = 0,
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DEST = 1
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} BLOCKSET;
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static void setup_block
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(
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BLOCKD *b,
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int mv_stride,
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unsigned char **base,
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int Stride,
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int offset,
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BLOCKSET bs
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)
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{
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if (bs == DEST)
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{
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b->dst_stride = Stride;
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b->dst = offset;
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b->base_dst = base;
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}
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else
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{
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b->pre_stride = Stride;
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b->pre = offset;
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b->base_pre = base;
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}
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}
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static void setup_macroblock(MACROBLOCKD *x, BLOCKSET bs)
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{
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int block;
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unsigned char **y, **u, **v;
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if (bs == DEST)
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{
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y = &x->dst.y_buffer;
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u = &x->dst.u_buffer;
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v = &x->dst.v_buffer;
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}
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else
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{
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y = &x->pre.y_buffer;
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u = &x->pre.u_buffer;
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v = &x->pre.v_buffer;
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}
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for (block = 0; block < 16; block++) /* y blocks */
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{
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setup_block(&x->block[block], x->dst.y_stride, y, x->dst.y_stride,
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(block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4, bs);
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}
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for (block = 16; block < 20; block++) /* U and V blocks */
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{
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setup_block(&x->block[block], x->dst.uv_stride, u, x->dst.uv_stride,
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((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs);
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setup_block(&x->block[block+4], x->dst.uv_stride, v, x->dst.uv_stride,
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((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs);
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}
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}
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void vp8_setup_block_dptrs(MACROBLOCKD *x)
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{
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int r, c;
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for (r = 0; r < 4; r++)
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{
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for (c = 0; c < 4; c++)
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{
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x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4;
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}
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}
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for (r = 0; r < 2; r++)
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{
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for (c = 0; c < 2; c++)
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{
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x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4;
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}
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}
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for (r = 0; r < 2; r++)
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{
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for (c = 0; c < 2; c++)
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{
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x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4;
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}
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}
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for (r = 0; r < 25; r++)
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{
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x->block[r].qcoeff = x->qcoeff + r * 16;
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x->block[r].dqcoeff = x->dqcoeff + r * 16;
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x->block[r].eob = x->eobs + r;
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}
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}
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void vp8_build_block_doffsets(MACROBLOCKD *x)
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{
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/* handle the destination pitch features */
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setup_macroblock(x, DEST);
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setup_macroblock(x, PRED);
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}
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