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vpx/vp8/common/reconintra4x4.c
Scott LaVarnway bcba86e2e9 Eliminated reconintra_mt.c 
Reworked the code to use vp8_build_intra_predictors_mby_s,
vp8_intra_prediction_down_copy, and vp8_intra4x4_predict_d_c
functions instead.  vp8_intra4x4_predict_d_c is a decoder-only
version of vp8_intra4x4_predict.  Future commits will fix this
code duplication.

Change-Id: Ifb4507103b7c83f8b94a872345191c49240154f5
2012-02-28 14:12:30 -05:00

309 lines
9.5 KiB
C
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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 "vpx_config.h"
#include "vpx_rtcd.h"
#include "blockd.h"
void vp8_intra4x4_predict_d_c(unsigned char *Above,
unsigned char *yleft, int left_stride,
int b_mode,
unsigned char *dst, int dst_stride,
unsigned char top_left)
{
int i, r, c;
unsigned char Left[4];
Left[0] = yleft[0];
Left[1] = yleft[left_stride];
Left[2] = yleft[2 * left_stride];
Left[3] = yleft[3 * left_stride];
switch (b_mode)
{
case B_DC_PRED:
{
int expected_dc = 0;
for (i = 0; i < 4; i++)
{
expected_dc += Above[i];
expected_dc += Left[i];
}
expected_dc = (expected_dc + 4) >> 3;
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
dst[c] = expected_dc;
}
dst += dst_stride;
}
}
break;
case B_TM_PRED:
{
/* prediction similar to true_motion prediction */
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
int pred = Above[c] - top_left + Left[r];
if (pred < 0)
pred = 0;
if (pred > 255)
pred = 255;
dst[c] = pred;
}
dst += dst_stride;
}
}
break;
case B_VE_PRED:
{
unsigned int ap[4];
ap[0] = (top_left + 2 * Above[0] + Above[1] + 2) >> 2;
ap[1] = (Above[0] + 2 * Above[1] + Above[2] + 2) >> 2;
ap[2] = (Above[1] + 2 * Above[2] + Above[3] + 2) >> 2;
ap[3] = (Above[2] + 2 * Above[3] + Above[4] + 2) >> 2;
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
dst[c] = ap[c];
}
dst += dst_stride;
}
}
break;
case B_HE_PRED:
{
unsigned int lp[4];
lp[0] = (top_left + 2 * Left[0] + Left[1] + 2) >> 2;
lp[1] = (Left[0] + 2 * Left[1] + Left[2] + 2) >> 2;
lp[2] = (Left[1] + 2 * Left[2] + Left[3] + 2) >> 2;
lp[3] = (Left[2] + 2 * Left[3] + Left[3] + 2) >> 2;
for (r = 0; r < 4; r++)
{
for (c = 0; c < 4; c++)
{
dst[c] = lp[r];
}
dst += dst_stride;
}
}
break;
case B_LD_PRED:
{
unsigned char *ptr = Above;
dst[0 * dst_stride + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2;
dst[0 * dst_stride + 1] =
dst[1 * dst_stride + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2;
dst[0 * dst_stride + 2] =
dst[1 * dst_stride + 1] =
dst[2 * dst_stride + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2;
dst[0 * dst_stride + 3] =
dst[1 * dst_stride + 2] =
dst[2 * dst_stride + 1] =
dst[3 * dst_stride + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2;
dst[1 * dst_stride + 3] =
dst[2 * dst_stride + 2] =
dst[3 * dst_stride + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2;
dst[2 * dst_stride + 3] =
dst[3 * dst_stride + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2;
dst[3 * dst_stride + 3] = (ptr[6] + ptr[7] * 2 + ptr[7] + 2) >> 2;
}
break;
case B_RD_PRED:
{
unsigned char pp[9];
pp[0] = Left[3];
pp[1] = Left[2];
pp[2] = Left[1];
pp[3] = Left[0];
pp[4] = top_left;
pp[5] = Above[0];
pp[6] = Above[1];
pp[7] = Above[2];
pp[8] = Above[3];
dst[3 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
dst[3 * dst_stride + 1] =
dst[2 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
dst[3 * dst_stride + 2] =
dst[2 * dst_stride + 1] =
dst[1 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
dst[3 * dst_stride + 3] =
dst[2 * dst_stride + 2] =
dst[1 * dst_stride + 1] =
dst[0 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
dst[2 * dst_stride + 3] =
dst[1 * dst_stride + 2] =
dst[0 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
dst[1 * dst_stride + 3] =
dst[0 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
dst[0 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
}
break;
case B_VR_PRED:
{
unsigned char pp[9];
pp[0] = Left[3];
pp[1] = Left[2];
pp[2] = Left[1];
pp[3] = Left[0];
pp[4] = top_left;
pp[5] = Above[0];
pp[6] = Above[1];
pp[7] = Above[2];
pp[8] = Above[3];
dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
dst[2 * dst_stride + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
dst[3 * dst_stride + 1] =
dst[1 * dst_stride + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
dst[2 * dst_stride + 1] =
dst[0 * dst_stride + 0] = (pp[4] + pp[5] + 1) >> 1;
dst[3 * dst_stride + 2] =
dst[1 * dst_stride + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
dst[2 * dst_stride + 2] =
dst[0 * dst_stride + 1] = (pp[5] + pp[6] + 1) >> 1;
dst[3 * dst_stride + 3] =
dst[1 * dst_stride + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
dst[2 * dst_stride + 3] =
dst[0 * dst_stride + 2] = (pp[6] + pp[7] + 1) >> 1;
dst[1 * dst_stride + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
dst[0 * dst_stride + 3] = (pp[7] + pp[8] + 1) >> 1;
}
break;
case B_VL_PRED:
{
unsigned char *pp = Above;
dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
dst[1 * dst_stride + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
dst[2 * dst_stride + 0] =
dst[0 * dst_stride + 1] = (pp[1] + pp[2] + 1) >> 1;
dst[1 * dst_stride + 1] =
dst[3 * dst_stride + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
dst[2 * dst_stride + 1] =
dst[0 * dst_stride + 2] = (pp[2] + pp[3] + 1) >> 1;
dst[3 * dst_stride + 1] =
dst[1 * dst_stride + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
dst[0 * dst_stride + 3] =
dst[2 * dst_stride + 2] = (pp[3] + pp[4] + 1) >> 1;
dst[1 * dst_stride + 3] =
dst[3 * dst_stride + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
dst[2 * dst_stride + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
dst[3 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
}
break;
case B_HD_PRED:
{
unsigned char pp[9];
pp[0] = Left[3];
pp[1] = Left[2];
pp[2] = Left[1];
pp[3] = Left[0];
pp[4] = top_left;
pp[5] = Above[0];
pp[6] = Above[1];
pp[7] = Above[2];
pp[8] = Above[3];
dst[3 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
dst[3 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
dst[2 * dst_stride + 0] =
dst[3 * dst_stride + 2] = (pp[1] + pp[2] + 1) >> 1;
dst[2 * dst_stride + 1] =
dst[3 * dst_stride + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
dst[2 * dst_stride + 2] =
dst[1 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1;
dst[2 * dst_stride + 3] =
dst[1 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
dst[1 * dst_stride + 2] =
dst[0 * dst_stride + 0] = (pp[3] + pp[4] + 1) >> 1;
dst[1 * dst_stride + 3] =
dst[0 * dst_stride + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
dst[0 * dst_stride + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
dst[0 * dst_stride + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
}
break;
case B_HU_PRED:
{
unsigned char *pp = Left;
dst[0 * dst_stride + 0] = (pp[0] + pp[1] + 1) >> 1;
dst[0 * dst_stride + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
dst[0 * dst_stride + 2] =
dst[1 * dst_stride + 0] = (pp[1] + pp[2] + 1) >> 1;
dst[0 * dst_stride + 3] =
dst[1 * dst_stride + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
dst[1 * dst_stride + 2] =
dst[2 * dst_stride + 0] = (pp[2] + pp[3] + 1) >> 1;
dst[1 * dst_stride + 3] =
dst[2 * dst_stride + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2;
dst[2 * dst_stride + 2] =
dst[2 * dst_stride + 3] =
dst[3 * dst_stride + 0] =
dst[3 * dst_stride + 1] =
dst[3 * dst_stride + 2] =
dst[3 * dst_stride + 3] = pp[3];
}
break;
}
}
void vp8_intra4x4_predict_c(unsigned char *src, int src_stride,
int b_mode,
unsigned char *dst, int dst_stride)
{
unsigned char *Above = src - src_stride;
vp8_intra4x4_predict_d_c(Above,
src - 1, src_stride,
b_mode,
dst, dst_stride,
Above[-1]);
}
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