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/*
* 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 "vp9/common/vp9_blockd.h"
typedef enum {
PRED = 0,
DEST = 1
} BLOCKSET;
static void setup_block
(
BLOCKD *b,
int mv_stride,
unsigned char **base,
unsigned char **base2,
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;
b->base_second_pre = base2;
}
}
static void setup_macroblock(MACROBLOCKD *xd, BLOCKSET bs) {
int block;
unsigned char **y, **u, **v;
unsigned char **y2, **u2, **v2;
BLOCKD *blockd = xd->block;
int stride;
if (bs == DEST) {
y = &xd->dst.y_buffer;
u = &xd->dst.u_buffer;
v = &xd->dst.v_buffer;
} else {
y = &xd->pre.y_buffer;
u = &xd->pre.u_buffer;
v = &xd->pre.v_buffer;
y2 = &xd->second_pre.y_buffer;
u2 = &xd->second_pre.u_buffer;
v2 = &xd->second_pre.v_buffer;
}
stride = xd->dst.y_stride;
for (block = 0; block < 16; block++) { /* y blocks */
setup_block(&blockd[block], stride, y, y2, stride,
(block >> 2) * 4 * stride + (block & 3) * 4, bs);
}
stride = xd->dst.uv_stride;
for (block = 16; block < 20; block++) { /* U and V blocks */
setup_block(&blockd[block], stride, u, u2, stride,
((block - 16) >> 1) * 4 * stride + (block & 1) * 4, bs);
setup_block(&blockd[block + 4], stride, v, v2, stride,
((block - 16) >> 1) * 4 * stride + (block & 1) * 4, bs);
}
}
void vp9_setup_block_dptrs(MACROBLOCKD *xd) {
int r, c;
BLOCKD *blockd = xd->block;
for (r = 0; r < 4; r++) {
for (c = 0; c < 4; c++) {
blockd[r * 4 + c].diff = &xd->diff[r * 4 * 16 + c * 4];
blockd[r * 4 + c].predictor = xd->predictor + r * 4 * 16 + c * 4;
}
}
for (r = 0; r < 2; r++) {
for (c = 0; c < 2; c++) {
blockd[16 + r * 2 + c].diff = &xd->diff[256 + r * 4 * 8 + c * 4];
blockd[16 + r * 2 + c].predictor =
xd->predictor + 256 + r * 4 * 8 + c * 4;
}
}
for (r = 0; r < 2; r++) {
for (c = 0; c < 2; c++) {
blockd[20 + r * 2 + c].diff = &xd->diff[320 + r * 4 * 8 + c * 4];
blockd[20 + r * 2 + c].predictor =
xd->predictor + 320 + r * 4 * 8 + c * 4;
}
}
blockd[24].diff = &xd->diff[384];
for (r = 0; r < 25; r++) {
blockd[r].qcoeff = xd->qcoeff + r * 16;
blockd[r].dqcoeff = xd->dqcoeff + r * 16;
}
}
void vp9_build_block_doffsets(MACROBLOCKD *xd) {
/* handle the destination pitch features */
setup_macroblock(xd, DEST);
setup_macroblock(xd, PRED);
}
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