ref: bdcfdebd68cdd16c98ac17d3eae9029c5215f9b3
dir: /vp8/common/reconintra.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 "vpx_config.h"
#include "vp8_rtcd.h"
#include "vpx_mem/vpx_mem.h"
#include "blockd.h"
void vp8_build_intra_predictors_mby_s_c(MACROBLOCKD *x,
unsigned char * yabove_row,
unsigned char * yleft,
int left_stride,
unsigned char * ypred_ptr,
int y_stride)
{
unsigned char yleft_col[16];
unsigned char ytop_left = yabove_row[-1];
int r, c, i;
for (i = 0; i < 16; i++)
{
yleft_col[i] = yleft[i* left_stride];
}
/* for Y */
switch (x->mode_info_context->mbmi.mode)
{
case DC_PRED:
{
int expected_dc;
int shift;
int average = 0;
if (x->up_available || x->left_available)
{
if (x->up_available)
{
for (i = 0; i < 16; i++)
{
average += yabove_row[i];
}
}
if (x->left_available)
{
for (i = 0; i < 16; i++)
{
average += yleft_col[i];
}
}
shift = 3 + x->up_available + x->left_available;
expected_dc = (average + (1 << (shift - 1))) >> shift;
}
else
{
expected_dc = 128;
}
/*memset(ypred_ptr, expected_dc, 256);*/
for (r = 0; r < 16; r++)
{
memset(ypred_ptr, expected_dc, 16);
ypred_ptr += y_stride;
}
}
break;
case V_PRED:
{
for (r = 0; r < 16; r++)
{
((int *)ypred_ptr)[0] = ((int *)yabove_row)[0];
((int *)ypred_ptr)[1] = ((int *)yabove_row)[1];
((int *)ypred_ptr)[2] = ((int *)yabove_row)[2];
((int *)ypred_ptr)[3] = ((int *)yabove_row)[3];
ypred_ptr += y_stride;
}
}
break;
case H_PRED:
{
for (r = 0; r < 16; r++)
{
memset(ypred_ptr, yleft_col[r], 16);
ypred_ptr += y_stride;
}
}
break;
case TM_PRED:
{
for (r = 0; r < 16; r++)
{
for (c = 0; c < 16; c++)
{
int pred = yleft_col[r] + yabove_row[ c] - ytop_left;
if (pred < 0)
pred = 0;
if (pred > 255)
pred = 255;
ypred_ptr[c] = pred;
}
ypred_ptr += y_stride;
}
}
break;
case B_PRED:
case NEARESTMV:
case NEARMV:
case ZEROMV:
case NEWMV:
case SPLITMV:
case MB_MODE_COUNT:
break;
}
}
void vp8_build_intra_predictors_mbuv_s_c(MACROBLOCKD *x,
unsigned char * uabove_row,
unsigned char * vabove_row,
unsigned char * uleft,
unsigned char * vleft,
int left_stride,
unsigned char * upred_ptr,
unsigned char * vpred_ptr,
int pred_stride)
{
unsigned char uleft_col[8];
unsigned char utop_left = uabove_row[-1];
unsigned char vleft_col[8];
unsigned char vtop_left = vabove_row[-1];
int i, j;
for (i = 0; i < 8; i++)
{
uleft_col[i] = uleft [i* left_stride];
vleft_col[i] = vleft [i* left_stride];
}
switch (x->mode_info_context->mbmi.uv_mode)
{
case DC_PRED:
{
int expected_udc;
int expected_vdc;
int shift;
int Uaverage = 0;
int Vaverage = 0;
if (x->up_available)
{
for (i = 0; i < 8; i++)
{
Uaverage += uabove_row[i];
Vaverage += vabove_row[i];
}
}
if (x->left_available)
{
for (i = 0; i < 8; i++)
{
Uaverage += uleft_col[i];
Vaverage += vleft_col[i];
}
}
if (!x->up_available && !x->left_available)
{
expected_udc = 128;
expected_vdc = 128;
}
else
{
shift = 2 + x->up_available + x->left_available;
expected_udc = (Uaverage + (1 << (shift - 1))) >> shift;
expected_vdc = (Vaverage + (1 << (shift - 1))) >> shift;
}
/*memset(upred_ptr,expected_udc,64);*/
/*memset(vpred_ptr,expected_vdc,64);*/
for (i = 0; i < 8; i++)
{
memset(upred_ptr, expected_udc, 8);
memset(vpred_ptr, expected_vdc, 8);
upred_ptr += pred_stride;
vpred_ptr += pred_stride;
}
}
break;
case V_PRED:
{
for (i = 0; i < 8; i++)
{
memcpy(upred_ptr, uabove_row, 8);
memcpy(vpred_ptr, vabove_row, 8);
upred_ptr += pred_stride;
vpred_ptr += pred_stride;
}
}
break;
case H_PRED:
{
for (i = 0; i < 8; i++)
{
memset(upred_ptr, uleft_col[i], 8);
memset(vpred_ptr, vleft_col[i], 8);
upred_ptr += pred_stride;
vpred_ptr += pred_stride;
}
}
break;
case TM_PRED:
{
for (i = 0; i < 8; i++)
{
for (j = 0; j < 8; j++)
{
int predu = uleft_col[i] + uabove_row[j] - utop_left;
int predv = vleft_col[i] + vabove_row[j] - vtop_left;
if (predu < 0)
predu = 0;
if (predu > 255)
predu = 255;
if (predv < 0)
predv = 0;
if (predv > 255)
predv = 255;
upred_ptr[j] = predu;
vpred_ptr[j] = predv;
}
upred_ptr += pred_stride;
vpred_ptr += pred_stride;
}
}
break;
case B_PRED:
case NEARESTMV:
case NEARMV:
case ZEROMV:
case NEWMV:
case SPLITMV:
case MB_MODE_COUNT:
break;
}
}