ref: b21fe3b27818826b2e5d687da22a90ad40c459f3
dir: /vp8/common/mbpitch.c/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include "blockd.h" typedef enum { PRED = 0, DEST = 1 } BLOCKSET; void vp8_setup_block ( BLOCKD *b, int mv_stride, unsigned char **base, int Stride, int offset, BLOCKSET bs ) { if (bs == DEST) { b->dst_stride = Stride; b->dst = offset; b->base_dst = base; } else { b->pre_stride = Stride; b->pre = offset; b->base_pre = base; } } void vp8_setup_macroblock(MACROBLOCKD *x, BLOCKSET bs) { int block; unsigned char **y, **u, **v; if (bs == DEST) { y = &x->dst.y_buffer; u = &x->dst.u_buffer; v = &x->dst.v_buffer; } else { y = &x->pre.y_buffer; u = &x->pre.u_buffer; v = &x->pre.v_buffer; } for (block = 0; block < 16; block++) /* y blocks */ { vp8_setup_block(&x->block[block], x->dst.y_stride, y, x->dst.y_stride, (block >> 2) * 4 * x->dst.y_stride + (block & 3) * 4, bs); } for (block = 16; block < 20; block++) /* U and V blocks */ { vp8_setup_block(&x->block[block], x->dst.uv_stride, u, x->dst.uv_stride, ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs); vp8_setup_block(&x->block[block+4], x->dst.uv_stride, v, x->dst.uv_stride, ((block - 16) >> 1) * 4 * x->dst.uv_stride + (block & 1) * 4, bs); } } void vp8_setup_block_dptrs(MACROBLOCKD *x) { int r, c; for (r = 0; r < 4; r++) { for (c = 0; c < 4; c++) { x->block[r*4+c].diff = &x->diff[r * 4 * 16 + c * 4]; x->block[r*4+c].predictor = x->predictor + r * 4 * 16 + c * 4; } } for (r = 0; r < 2; r++) { for (c = 0; c < 2; c++) { x->block[16+r*2+c].diff = &x->diff[256 + r * 4 * 8 + c * 4]; x->block[16+r*2+c].predictor = x->predictor + 256 + r * 4 * 8 + c * 4; } } for (r = 0; r < 2; r++) { for (c = 0; c < 2; c++) { x->block[20+r*2+c].diff = &x->diff[320+ r * 4 * 8 + c * 4]; x->block[20+r*2+c].predictor = x->predictor + 320 + r * 4 * 8 + c * 4; } } x->block[24].diff = &x->diff[384]; for (r = 0; r < 25; r++) { x->block[r].qcoeff = x->qcoeff + r * 16; x->block[r].dqcoeff = x->dqcoeff + r * 16; } } void vp8_build_block_doffsets(MACROBLOCKD *x) { /* handle the destination pitch features */ vp8_setup_macroblock(x, DEST); vp8_setup_macroblock(x, PRED); }