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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, uint8_t **base, uint8_t **base2,
int stride, int offset, BLOCKSET bs) {
if (bs == DEST) {
b->dst_stride = stride;
b->dst = offset;
b->base_dst = base;
}
}
static void setup_macroblock(MACROBLOCKD *mb, BLOCKSET bs) {
BLOCKD *blockd = mb->block;
uint8_t **y, **u, **v, **y2, **u2, **v2;
int i, stride;
if (bs == DEST) {
y = &mb->plane[0].dst.buf;
u = &mb->plane[1].dst.buf;
v = &mb->plane[2].dst.buf;
y2 = NULL;
u2 = NULL;
v2 = NULL;
}
// luma
stride = mb->plane[0].dst.stride;
for (i = 0; i < 16; ++i) {
const int offset = (i >> 2) * 4 * stride + (i & 3) * 4;
setup_block(&blockd[i], y, y2, stride, offset, bs);
}
// chroma
stride = mb->plane[1].dst.stride;
for (i = 16; i < 20; i++) {
const int offset = ((i - 16) >> 1) * 4 * stride + (i & 1) * 4;
setup_block(&blockd[i], u, u2, stride, offset, bs);
setup_block(&blockd[i + 4], v, v2, stride, offset, bs);
}
}
void vp9_setup_block_dptrs(MACROBLOCKD *mb) {
int i;
for (i = 0; i < MAX_MB_PLANE; i++) {
mb->plane[i].plane_type = i ? PLANE_TYPE_UV : PLANE_TYPE_Y_WITH_DC;
mb->plane[i].subsampling_x = !!i;
mb->plane[i].subsampling_y = !!i;
}
}
void vp9_build_block_doffsets(MACROBLOCKD *mb) {
// handle the destination pitch features
setup_macroblock(mb, DEST);
}
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