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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 "blockd.h"
typedef enum
{
PRED = 0,
DEST = 1
} BLOCKSET;
static void 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;
}
}
static void 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 */
{
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 */
{
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);
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 */
setup_macroblock(x, DEST);
setup_macroblock(x, PRED);
}
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