316 lines
9.4 KiB
C
316 lines
9.4 KiB
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_ports/config.h"
|
|
#include "recon.h"
|
|
#include "vpx_mem/vpx_mem.h"
|
|
#include "reconintra.h"
|
|
|
|
void vp8_intra4x4_predict(BLOCKD *x,
|
|
int b_mode,
|
|
unsigned char *predictor)
|
|
{
|
|
int i, r, c;
|
|
|
|
unsigned char *Above = *(x->base_dst) + x->dst - x->dst_stride;
|
|
unsigned char Left[4];
|
|
unsigned char top_left = Above[-1];
|
|
|
|
Left[0] = (*(x->base_dst))[x->dst - 1];
|
|
Left[1] = (*(x->base_dst))[x->dst - 1 + x->dst_stride];
|
|
Left[2] = (*(x->base_dst))[x->dst - 1 + 2 * x->dst_stride];
|
|
Left[3] = (*(x->base_dst))[x->dst - 1 + 3 * x->dst_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++)
|
|
{
|
|
predictor[c] = expected_dc;
|
|
}
|
|
|
|
predictor += 16;
|
|
}
|
|
}
|
|
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;
|
|
|
|
predictor[c] = pred;
|
|
}
|
|
|
|
predictor += 16;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case B_VE_PRED:
|
|
{
|
|
|
|
unsigned int ap[4];
|
|
ap[0] = Above[0];
|
|
ap[1] = Above[1];
|
|
ap[2] = Above[2];
|
|
ap[3] = Above[3];
|
|
|
|
for (r = 0; r < 4; r++)
|
|
{
|
|
for (c = 0; c < 4; c++)
|
|
{
|
|
|
|
predictor[c] = ap[c];
|
|
}
|
|
|
|
predictor += 16;
|
|
}
|
|
|
|
}
|
|
break;
|
|
|
|
|
|
case B_HE_PRED:
|
|
{
|
|
|
|
unsigned int lp[4];
|
|
lp[0] = Left[0];
|
|
lp[1] = Left[1];
|
|
lp[2] = Left[2];
|
|
lp[3] = Left[3];
|
|
|
|
for (r = 0; r < 4; r++)
|
|
{
|
|
for (c = 0; c < 4; c++)
|
|
{
|
|
predictor[c] = lp[r];
|
|
}
|
|
|
|
predictor += 16;
|
|
}
|
|
}
|
|
break;
|
|
case B_LD_PRED:
|
|
{
|
|
unsigned char *ptr = Above;
|
|
predictor[0 * 16 + 0] = (ptr[0] + ptr[1] * 2 + ptr[2] + 2) >> 2;
|
|
predictor[0 * 16 + 1] =
|
|
predictor[1 * 16 + 0] = (ptr[1] + ptr[2] * 2 + ptr[3] + 2) >> 2;
|
|
predictor[0 * 16 + 2] =
|
|
predictor[1 * 16 + 1] =
|
|
predictor[2 * 16 + 0] = (ptr[2] + ptr[3] * 2 + ptr[4] + 2) >> 2;
|
|
predictor[0 * 16 + 3] =
|
|
predictor[1 * 16 + 2] =
|
|
predictor[2 * 16 + 1] =
|
|
predictor[3 * 16 + 0] = (ptr[3] + ptr[4] * 2 + ptr[5] + 2) >> 2;
|
|
predictor[1 * 16 + 3] =
|
|
predictor[2 * 16 + 2] =
|
|
predictor[3 * 16 + 1] = (ptr[4] + ptr[5] * 2 + ptr[6] + 2) >> 2;
|
|
predictor[2 * 16 + 3] =
|
|
predictor[3 * 16 + 2] = (ptr[5] + ptr[6] * 2 + ptr[7] + 2) >> 2;
|
|
predictor[3 * 16 + 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];
|
|
|
|
predictor[3 * 16 + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
|
|
predictor[3 * 16 + 1] =
|
|
predictor[2 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
|
|
predictor[3 * 16 + 2] =
|
|
predictor[2 * 16 + 1] =
|
|
predictor[1 * 16 + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
|
|
predictor[3 * 16 + 3] =
|
|
predictor[2 * 16 + 2] =
|
|
predictor[1 * 16 + 1] =
|
|
predictor[0 * 16 + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
|
|
predictor[2 * 16 + 3] =
|
|
predictor[1 * 16 + 2] =
|
|
predictor[0 * 16 + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
|
|
predictor[1 * 16 + 3] =
|
|
predictor[0 * 16 + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
|
|
predictor[0 * 16 + 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];
|
|
|
|
|
|
predictor[3 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
|
|
predictor[2 * 16 + 0] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
|
|
predictor[3 * 16 + 1] =
|
|
predictor[1 * 16 + 0] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
|
|
predictor[2 * 16 + 1] =
|
|
predictor[0 * 16 + 0] = (pp[4] + pp[5] + 1) >> 1;
|
|
predictor[3 * 16 + 2] =
|
|
predictor[1 * 16 + 1] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
|
|
predictor[2 * 16 + 2] =
|
|
predictor[0 * 16 + 1] = (pp[5] + pp[6] + 1) >> 1;
|
|
predictor[3 * 16 + 3] =
|
|
predictor[1 * 16 + 2] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
|
|
predictor[2 * 16 + 3] =
|
|
predictor[0 * 16 + 2] = (pp[6] + pp[7] + 1) >> 1;
|
|
predictor[1 * 16 + 3] = (pp[6] + pp[7] * 2 + pp[8] + 2) >> 2;
|
|
predictor[0 * 16 + 3] = (pp[7] + pp[8] + 1) >> 1;
|
|
|
|
}
|
|
break;
|
|
case B_VL_PRED:
|
|
{
|
|
|
|
unsigned char *pp = Above;
|
|
|
|
predictor[0 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1;
|
|
predictor[1 * 16 + 0] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
|
|
predictor[2 * 16 + 0] =
|
|
predictor[0 * 16 + 1] = (pp[1] + pp[2] + 1) >> 1;
|
|
predictor[1 * 16 + 1] =
|
|
predictor[3 * 16 + 0] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
|
|
predictor[2 * 16 + 1] =
|
|
predictor[0 * 16 + 2] = (pp[2] + pp[3] + 1) >> 1;
|
|
predictor[3 * 16 + 1] =
|
|
predictor[1 * 16 + 2] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
|
|
predictor[0 * 16 + 3] =
|
|
predictor[2 * 16 + 2] = (pp[3] + pp[4] + 1) >> 1;
|
|
predictor[1 * 16 + 3] =
|
|
predictor[3 * 16 + 2] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
|
|
predictor[2 * 16 + 3] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
|
|
predictor[3 * 16 + 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];
|
|
|
|
|
|
predictor[3 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1;
|
|
predictor[3 * 16 + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
|
|
predictor[2 * 16 + 0] =
|
|
predictor[3 * 16 + 2] = (pp[1] + pp[2] + 1) >> 1;
|
|
predictor[2 * 16 + 1] =
|
|
predictor[3 * 16 + 3] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
|
|
predictor[2 * 16 + 2] =
|
|
predictor[1 * 16 + 0] = (pp[2] + pp[3] + 1) >> 1;
|
|
predictor[2 * 16 + 3] =
|
|
predictor[1 * 16 + 1] = (pp[2] + pp[3] * 2 + pp[4] + 2) >> 2;
|
|
predictor[1 * 16 + 2] =
|
|
predictor[0 * 16 + 0] = (pp[3] + pp[4] + 1) >> 1;
|
|
predictor[1 * 16 + 3] =
|
|
predictor[0 * 16 + 1] = (pp[3] + pp[4] * 2 + pp[5] + 2) >> 2;
|
|
predictor[0 * 16 + 2] = (pp[4] + pp[5] * 2 + pp[6] + 2) >> 2;
|
|
predictor[0 * 16 + 3] = (pp[5] + pp[6] * 2 + pp[7] + 2) >> 2;
|
|
}
|
|
break;
|
|
|
|
|
|
case B_HU_PRED:
|
|
{
|
|
unsigned char *pp = Left;
|
|
predictor[0 * 16 + 0] = (pp[0] + pp[1] + 1) >> 1;
|
|
predictor[0 * 16 + 1] = (pp[0] + pp[1] * 2 + pp[2] + 2) >> 2;
|
|
predictor[0 * 16 + 2] =
|
|
predictor[1 * 16 + 0] = (pp[1] + pp[2] + 1) >> 1;
|
|
predictor[0 * 16 + 3] =
|
|
predictor[1 * 16 + 1] = (pp[1] + pp[2] * 2 + pp[3] + 2) >> 2;
|
|
predictor[1 * 16 + 2] =
|
|
predictor[2 * 16 + 0] = (pp[2] + pp[3] + 1) >> 1;
|
|
predictor[1 * 16 + 3] =
|
|
predictor[2 * 16 + 1] = (pp[2] + pp[3] * 2 + pp[3] + 2) >> 2;
|
|
predictor[2 * 16 + 2] =
|
|
predictor[2 * 16 + 3] =
|
|
predictor[3 * 16 + 0] =
|
|
predictor[3 * 16 + 1] =
|
|
predictor[3 * 16 + 2] =
|
|
predictor[3 * 16 + 3] = pp[3];
|
|
}
|
|
break;
|
|
|
|
|
|
}
|
|
}
|
|
/* copy 4 bytes from the above right down so that the 4x4 prediction modes using pixels above and
|
|
* to the right prediction have filled in pixels to use.
|
|
*/
|
|
void vp8_intra_prediction_down_copy(MACROBLOCKD *x)
|
|
{
|
|
unsigned char *above_right = *(x->block[0].base_dst) + x->block[0].dst - x->block[0].dst_stride + 16;
|
|
|
|
unsigned int *src_ptr = (unsigned int *)above_right;
|
|
unsigned int *dst_ptr0 = (unsigned int *)(above_right + 4 * x->block[0].dst_stride);
|
|
unsigned int *dst_ptr1 = (unsigned int *)(above_right + 8 * x->block[0].dst_stride);
|
|
unsigned int *dst_ptr2 = (unsigned int *)(above_right + 12 * x->block[0].dst_stride);
|
|
|
|
*dst_ptr0 = *src_ptr;
|
|
*dst_ptr1 = *src_ptr;
|
|
*dst_ptr2 = *src_ptr;
|
|
}
|
|
|
|
|