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vpx/vp9/common/vp9_reconintra.c
Tero Rintaluoma 56e6c66b49 Avoid division in intra prediction 
- Using multiplication and shifting instead of division in
  intra prediction.
- Maximum absolute difference is 1 for division statements
  in d45, d27, d63 prediction modes. However, errors can
  cumulate for large block sizes when using already predicted
  values.
- Maximum number of non-matching result values in loops using
  division are:
  4x4        0/16
  8x8        0/64
  16x16     10/256
  32x32     13/1024
  64x64    122/4096

  Overall PSNR
  derf:     0.005
  yt:      -0.022
  std-hd:   0.021
  hd:      -0.006

Change-Id: I3979a02eb6351636442c1af1e23d6c4e6ec1d01d
2013-02-20 10:37:36 +02:00

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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 <stdio.h>
#include "./vpx_config.h"
#include "vp9_rtcd.h"
#include "vp9/common/vp9_reconintra.h"
#include "vpx_mem/vpx_mem.h"
/* For skip_recon_mb(), add vp9_build_intra_predictors_mby_s(MACROBLOCKD *xd)
* and vp9_build_intra_predictors_mbuv_s(MACROBLOCKD *xd).
*/
/* Using multiplication and shifting instead of division in diagonal prediction.
* iscale table is calculated from ((1<<16) + (i+2)/2) / (i+2) and used as
* ((A + B) * iscale[i] + (1<<15)) >> 16;
* where A and B are weighted pixel values.
*/
static const unsigned int iscale[64] = {
32768, 21845, 16384, 13107, 10923, 9362, 8192, 7282,
6554, 5958, 5461, 5041, 4681, 4369, 4096, 3855,
3641, 3449, 3277, 3121, 2979, 2849, 2731, 2621,
2521, 2427, 2341, 2260, 2185, 2114, 2048, 1986,
1928, 1872, 1820, 1771, 1725, 1680, 1638, 1598,
1560, 1524, 1489, 1456, 1425, 1394, 1365, 1337,
1311, 1285, 1260, 1237, 1214, 1192, 1170, 1150,
1130, 1111, 1092, 1074, 1057, 1040, 1024, 1008,
};
static void d27_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c, h, w, v;
int a, b;
r = 0;
for (c = 0; c < n - 2; c++) {
if (c & 1)
a = yleft_col[r + 1];
else
a = (yleft_col[r] + yleft_col[r + 1] + 1) >> 1;
b = yabove_row[c + 2];
ypred_ptr[c] = ((2 * a + (c + 1) * b) * iscale[1+c] + (1<<15)) >> 16;
}
for (r = 1; r < n / 2 - 1; r++) {
for (c = 0; c < n - 2 - 2 * r; c++) {
if (c & 1)
a = yleft_col[r + 1];
else
a = (yleft_col[r] + yleft_col[r + 1] + 1) >> 1;
b = ypred_ptr[(r - 1) * y_stride + c + 2];
ypred_ptr[r * y_stride + c] =
((2 * a + (c + 1) * b) * iscale[1+c] + (1<<15)) >> 16;
}
}
for (; r < n - 1; ++r) {
for (c = 0; c < n; c++) {
v = (c & 1 ? yleft_col[r + 1] : (yleft_col[r] + yleft_col[r + 1] + 1) >> 1);
h = r - c / 2;
ypred_ptr[h * y_stride + c] = v;
}
}
c = 0;
r = n - 1;
ypred_ptr[r * y_stride] = (ypred_ptr[(r - 1) * y_stride] +
yleft_col[r] + 1) >> 1;
for (r = n - 2; r >= n / 2; --r) {
w = c + (n - 1 - r) * 2;
ypred_ptr[r * y_stride + w] = (ypred_ptr[(r - 1) * y_stride + w] +
ypred_ptr[r * y_stride + w - 1] + 1) >> 1;
}
for (c = 1; c < n; c++) {
for (r = n - 1; r >= n / 2 + c / 2; --r) {
w = c + (n - 1 - r) * 2;
ypred_ptr[r * y_stride + w] = (ypred_ptr[(r - 1) * y_stride + w] +
ypred_ptr[r * y_stride + w - 1] + 1) >> 1;
}
}
}
static void d63_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c, h, w, v;
int a, b;
c = 0;
for (r = 0; r < n - 2; r++) {
if (r & 1)
a = yabove_row[c + 1];
else
a = (yabove_row[c] + yabove_row[c + 1] + 1) >> 1;
b = yleft_col[r + 2];
ypred_ptr[r * y_stride] = ((2 * a + (r + 1) * b) * iscale[1+r] +
(1<<15)) >> 16;
}
for (c = 1; c < n / 2 - 1; c++) {
for (r = 0; r < n - 2 - 2 * c; r++) {
if (r & 1)
a = yabove_row[c + 1];
else
a = (yabove_row[c] + yabove_row[c + 1] + 1) >> 1;
b = ypred_ptr[(r + 2) * y_stride + c - 1];
ypred_ptr[r * y_stride + c] = ((2 * a + (c + 1) * b) * iscale[1+c] +
(1<<15)) >> 16;
}
}
for (; c < n - 1; ++c) {
for (r = 0; r < n; r++) {
v = (r & 1 ? yabove_row[c + 1] : (yabove_row[c] + yabove_row[c + 1] + 1) >> 1);
w = c - r / 2;
ypred_ptr[r * y_stride + w] = v;
}
}
r = 0;
c = n - 1;
ypred_ptr[c] = (ypred_ptr[(c - 1)] + yabove_row[c] + 1) >> 1;
for (c = n - 2; c >= n / 2; --c) {
h = r + (n - 1 - c) * 2;
ypred_ptr[h * y_stride + c] = (ypred_ptr[h * y_stride + c - 1] +
ypred_ptr[(h - 1) * y_stride + c] + 1) >> 1;
}
for (r = 1; r < n; r++) {
for (c = n - 1; c >= n / 2 + r / 2; --c) {
h = r + (n - 1 - c) * 2;
ypred_ptr[h * y_stride + c] = (ypred_ptr[h * y_stride + c - 1] +
ypred_ptr[(h - 1) * y_stride + c] + 1) >> 1;
}
}
}
static void d45_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
for (r = 0; r < n - 1; ++r) {
for (c = 0; c <= r; ++c) {
ypred_ptr[(r - c) * y_stride + c] =
((yabove_row[r + 1] * (c + 1) +
yleft_col[r + 1] * (r - c + 1)) * iscale[r] + (1<<15)) >> 16;
}
}
for (c = 0; c <= r; ++c) {
int yabove_ext = yabove_row[r]; // clip_pixel(2 * yabove_row[r] -
// yabove_row[r - 1]);
int yleft_ext = yleft_col[r]; // clip_pixel(2 * yleft_col[r] -
// yleft_col[r-1]);
ypred_ptr[(r - c) * y_stride + c] =
((yabove_ext * (c + 1) +
yleft_ext * (r - c + 1)) * iscale[r] + (1<<15)) >> 16;
}
for (r = 1; r < n; ++r) {
for (c = n - r; c < n; ++c) {
const int yabove_ext = ypred_ptr[(r - 1) * y_stride + c];
const int yleft_ext = ypred_ptr[r * y_stride + c - 1];
ypred_ptr[r * y_stride + c] = (yabove_ext + yleft_ext + 1) >> 1;
}
}
}
static void d117_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
for (c = 0; c < n; c++)
ypred_ptr[c] = (yabove_row[c - 1] + yabove_row[c] + 1) >> 1;
ypred_ptr += y_stride;
for (c = 0; c < n; c++)
ypred_ptr[c] = yabove_row[c - 1];
ypred_ptr += y_stride;
for (r = 2; r < n; ++r) {
ypred_ptr[0] = yleft_col[r - 2];
for (c = 1; c < n; c++)
ypred_ptr[c] = ypred_ptr[-2 * y_stride + c - 1];
ypred_ptr += y_stride;
}
}
static void d135_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
ypred_ptr[0] = yabove_row[-1];
for (c = 1; c < n; c++)
ypred_ptr[c] = yabove_row[c - 1];
for (r = 1; r < n; ++r)
ypred_ptr[r * y_stride] = yleft_col[r - 1];
ypred_ptr += y_stride;
for (r = 1; r < n; ++r) {
for (c = 1; c < n; c++) {
ypred_ptr[c] = ypred_ptr[-y_stride + c - 1];
}
ypred_ptr += y_stride;
}
}
static void d153_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
ypred_ptr[0] = (yabove_row[-1] + yleft_col[0] + 1) >> 1;
for (r = 1; r < n; r++)
ypred_ptr[r * y_stride] = (yleft_col[r - 1] + yleft_col[r] + 1) >> 1;
ypred_ptr++;
ypred_ptr[0] = yabove_row[-1];
for (r = 1; r < n; r++)
ypred_ptr[r * y_stride] = yleft_col[r - 1];
ypred_ptr++;
for (c = 0; c < n - 2; c++)
ypred_ptr[c] = yabove_row[c];
ypred_ptr += y_stride;
for (r = 1; r < n; ++r) {
for (c = 0; c < n - 2; c++)
ypred_ptr[c] = ypred_ptr[-y_stride + c - 2];
ypred_ptr += y_stride;
}
}
static void corner_predictor(uint8_t *ypred_ptr, int y_stride, int n,
uint8_t *yabove_row,
uint8_t *yleft_col) {
int mh, mv, maxgradh, maxgradv, x, y, nx, ny;
int i, j;
int top_left = yabove_row[-1];
mh = mv = 0;
maxgradh = yabove_row[1] - top_left;
maxgradv = yleft_col[1] - top_left;
for (i = 2; i < n; ++i) {
int gh = yabove_row[i] - yabove_row[i - 2];
int gv = yleft_col[i] - yleft_col[i - 2];
if (gh > maxgradh) {
maxgradh = gh;
mh = i - 1;
}
if (gv > maxgradv) {
maxgradv = gv;
mv = i - 1;
}
}
nx = mh + mv + 3;
ny = 2 * n + 1 - nx;
x = top_left;
for (i = 0; i <= mh; ++i) x += yabove_row[i];
for (i = 0; i <= mv; ++i) x += yleft_col[i];
x += (nx >> 1);
x /= nx;
y = 0;
for (i = mh + 1; i < n; ++i) y += yabove_row[i];
for (i = mv + 1; i < n; ++i) y += yleft_col[i];
y += (ny >> 1);
y /= ny;
for (i = 0; i < n; ++i) {
for (j = 0; j < n; ++j)
ypred_ptr[j] = (i <= mh && j <= mv ? x : y);
ypred_ptr += y_stride;
}
}
void vp9_recon_intra_mbuv(MACROBLOCKD *xd) {
int i;
for (i = 16; i < 24; i += 2) {
BLOCKD *b = &xd->block[i];
vp9_recon2b(b->predictor, b->diff, *(b->base_dst) + b->dst, b->dst_stride);
}
}
void vp9_build_intra_predictors_internal(uint8_t *src, int src_stride,
uint8_t *ypred_ptr,
int y_stride, int mode, int bsize,
int up_available, int left_available,
int right_available) {
int r, c, i;
uint8_t yleft_col[64], yabove_data[65], ytop_left;
uint8_t *yabove_row = yabove_data + 1;
/*
* 127 127 127 .. 127 127 127 127 127 127
* 129 A B .. Y Z
* 129 C D .. W X
* 129 E F .. U V
* 129 G H .. S T T T T T
* ..
*/
if (left_available) {
for (i = 0; i < bsize; i++)
yleft_col[i] = src[i * src_stride - 1];
} else {
vpx_memset(yleft_col, 129, bsize);
}
if (up_available) {
uint8_t *yabove_ptr = src - src_stride;
vpx_memcpy(yabove_row, yabove_ptr, bsize);
if (left_available) {
ytop_left = yabove_ptr[-1];
} else {
ytop_left = 127;
}
} else {
vpx_memset(yabove_row, 127, bsize);
ytop_left = 127;
}
yabove_row[-1] = ytop_left;
/* for Y */
switch (mode) {
case DC_PRED: {
int expected_dc;
int i;
int shift;
int average = 0;
int log2_bsize_minus_1;
assert(bsize == 4 || bsize == 8 || bsize == 16 || bsize == 32 ||
bsize == 64);
if (bsize == 4) {
log2_bsize_minus_1 = 1;
} else if (bsize == 8) {
log2_bsize_minus_1 = 2;
} else if (bsize == 16) {
log2_bsize_minus_1 = 3;
} else if (bsize == 32) {
log2_bsize_minus_1 = 4;
} else {
assert(bsize == 64);
log2_bsize_minus_1 = 5;
}
if (up_available || left_available) {
if (up_available) {
for (i = 0; i < bsize; i++) {
average += yabove_row[i];
}
}
if (left_available) {
for (i = 0; i < bsize; i++) {
average += yleft_col[i];
}
}
shift = log2_bsize_minus_1 + up_available + left_available;
expected_dc = (average + (1 << (shift - 1))) >> shift;
} else {
expected_dc = 128;
}
for (r = 0; r < bsize; r++) {
vpx_memset(ypred_ptr, expected_dc, bsize);
ypred_ptr += y_stride;
}
}
break;
case V_PRED: {
for (r = 0; r < bsize; r++) {
memcpy(ypred_ptr, yabove_row, bsize);
ypred_ptr += y_stride;
}
}
break;
case H_PRED: {
for (r = 0; r < bsize; r++) {
vpx_memset(ypred_ptr, yleft_col[r], bsize);
ypred_ptr += y_stride;
}
}
break;
case TM_PRED: {
for (r = 0; r < bsize; r++) {
for (c = 0; c < bsize; c++) {
ypred_ptr[c] = clip_pixel(yleft_col[r] + yabove_row[c] - ytop_left);
}
ypred_ptr += y_stride;
}
}
break;
case D45_PRED: {
d45_predictor(ypred_ptr, y_stride, bsize, yabove_row, yleft_col);
}
break;
case D135_PRED: {
d135_predictor(ypred_ptr, y_stride, bsize, yabove_row, yleft_col);
}
break;
case D117_PRED: {
d117_predictor(ypred_ptr, y_stride, bsize, yabove_row, yleft_col);
}
break;
case D153_PRED: {
d153_predictor(ypred_ptr, y_stride, bsize, yabove_row, yleft_col);
}
break;
case D27_PRED: {
d27_predictor(ypred_ptr, y_stride, bsize, yabove_row, yleft_col);
}
break;
case D63_PRED: {
d63_predictor(ypred_ptr, y_stride, bsize, yabove_row, yleft_col);
}
break;
case I8X8_PRED:
case B_PRED:
case NEARESTMV:
case NEARMV:
case ZEROMV:
case NEWMV:
case SPLITMV:
case MB_MODE_COUNT:
break;
}
}
#if CONFIG_COMP_INTERINTRA_PRED
static void combine_interintra(MB_PREDICTION_MODE mode,
uint8_t *interpred,
int interstride,
uint8_t *intrapred,
int intrastride,
int size) {
// TODO(debargha): Explore different ways of combining predictors
// or designing the tables below
static const int scale_bits = 8;
static const int scale_max = 256; // 1 << scale_bits;
static const int scale_round = 127; // (1 << (scale_bits - 1));
// This table is a function A + B*exp(-kx), where x is hor. index
static const int weights1d[64] = {
128, 125, 122, 119, 116, 114, 111, 109,
107, 105, 103, 101, 99, 97, 96, 94,
93, 91, 90, 89, 88, 86, 85, 84,
83, 82, 81, 81, 80, 79, 78, 78,
77, 76, 76, 75, 75, 74, 74, 73,
73, 72, 72, 71, 71, 71, 70, 70,
70, 70, 69, 69, 69, 69, 68, 68,
68, 68, 68, 67, 67, 67, 67, 67,
};
int size_scale = (size >= 64 ? 1:
size == 32 ? 2 :
size == 16 ? 4 :
size == 8 ? 8 : 16);
int i, j;
switch (mode) {
case V_PRED:
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
int scale = weights1d[i * size_scale];
interpred[k] =
((scale_max - scale) * interpred[k] +
scale * intrapred[i * intrastride + j] + scale_round)
>> scale_bits;
}
}
break;
case H_PRED:
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
int scale = weights1d[j * size_scale];
interpred[k] =
((scale_max - scale) * interpred[k] +
scale * intrapred[i * intrastride + j] + scale_round)
>> scale_bits;
}
}
break;
case D63_PRED:
case D117_PRED:
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
int scale = (weights1d[i * size_scale] * 3 +
weights1d[j * size_scale]) >> 2;
interpred[k] =
((scale_max - scale) * interpred[k] +
scale * intrapred[i * intrastride + j] + scale_round)
>> scale_bits;
}
}
break;
case D27_PRED:
case D153_PRED:
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
int scale = (weights1d[j * size_scale] * 3 +
weights1d[i * size_scale]) >> 2;
interpred[k] =
((scale_max - scale) * interpred[k] +
scale * intrapred[i * intrastride + j] + scale_round)
>> scale_bits;
}
}
break;
case D135_PRED:
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
int scale = weights1d[(i < j ? i : j) * size_scale];
interpred[k] =
((scale_max - scale) * interpred[k] +
scale * intrapred[i * intrastride + j] + scale_round)
>> scale_bits;
}
}
break;
case D45_PRED:
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
int scale = (weights1d[i * size_scale] +
weights1d[j * size_scale]) >> 1;
interpred[k] =
((scale_max - scale) * interpred[k] +
scale * intrapred[i * intrastride + j] + scale_round)
>> scale_bits;
}
}
break;
case TM_PRED:
case DC_PRED:
default:
// simple average
for (i = 0; i < size; ++i) {
for (j = 0; j < size; ++j) {
int k = i * interstride + j;
interpred[k] = (interpred[k] + intrapred[i * intrastride + j]) >> 1;
}
}
break;
}
}
void vp9_build_interintra_16x16_predictors_mb(MACROBLOCKD *xd,
uint8_t *ypred,
uint8_t *upred,
uint8_t *vpred,
int ystride, int uvstride) {
vp9_build_interintra_16x16_predictors_mby(xd, ypred, ystride);
vp9_build_interintra_16x16_predictors_mbuv(xd, upred, vpred, uvstride);
}
void vp9_build_interintra_16x16_predictors_mby(MACROBLOCKD *xd,
uint8_t *ypred,
int ystride) {
uint8_t intrapredictor[256];
vp9_build_intra_predictors_internal(
xd->dst.y_buffer, xd->dst.y_stride,
intrapredictor, 16,
xd->mode_info_context->mbmi.interintra_mode, 16,
xd->up_available, xd->left_available, xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_mode,
ypred, ystride, intrapredictor, 16, 16);
}
void vp9_build_interintra_16x16_predictors_mbuv(MACROBLOCKD *xd,
uint8_t *upred,
uint8_t *vpred,
int uvstride) {
uint8_t uintrapredictor[64];
uint8_t vintrapredictor[64];
vp9_build_intra_predictors_internal(
xd->dst.u_buffer, xd->dst.uv_stride,
uintrapredictor, 8,
xd->mode_info_context->mbmi.interintra_uv_mode, 8,
xd->up_available, xd->left_available, xd->right_available);
vp9_build_intra_predictors_internal(
xd->dst.v_buffer, xd->dst.uv_stride,
vintrapredictor, 8,
xd->mode_info_context->mbmi.interintra_uv_mode, 8,
xd->up_available, xd->left_available, xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
upred, uvstride, uintrapredictor, 8, 8);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
vpred, uvstride, vintrapredictor, 8, 8);
}
void vp9_build_interintra_32x32_predictors_sby(MACROBLOCKD *xd,
uint8_t *ypred,
int ystride) {
uint8_t intrapredictor[1024];
vp9_build_intra_predictors_internal(
xd->dst.y_buffer, xd->dst.y_stride,
intrapredictor, 32,
xd->mode_info_context->mbmi.interintra_mode, 32,
xd->up_available, xd->left_available, xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_mode,
ypred, ystride, intrapredictor, 32, 32);
}
void vp9_build_interintra_32x32_predictors_sbuv(MACROBLOCKD *xd,
uint8_t *upred,
uint8_t *vpred,
int uvstride) {
uint8_t uintrapredictor[256];
uint8_t vintrapredictor[256];
vp9_build_intra_predictors_internal(
xd->dst.u_buffer, xd->dst.uv_stride,
uintrapredictor, 16,
xd->mode_info_context->mbmi.interintra_uv_mode, 16,
xd->up_available, xd->left_available, xd->right_available);
vp9_build_intra_predictors_internal(
xd->dst.v_buffer, xd->dst.uv_stride,
vintrapredictor, 16,
xd->mode_info_context->mbmi.interintra_uv_mode, 16,
xd->up_available, xd->left_available, xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
upred, uvstride, uintrapredictor, 16, 16);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
vpred, uvstride, vintrapredictor, 16, 16);
}
void vp9_build_interintra_32x32_predictors_sb(MACROBLOCKD *xd,
uint8_t *ypred,
uint8_t *upred,
uint8_t *vpred,
int ystride,
int uvstride) {
vp9_build_interintra_32x32_predictors_sby(xd, ypred, ystride);
vp9_build_interintra_32x32_predictors_sbuv(xd, upred, vpred, uvstride);
}
void vp9_build_interintra_64x64_predictors_sby(MACROBLOCKD *xd,
uint8_t *ypred,
int ystride) {
uint8_t intrapredictor[4096];
const int mode = xd->mode_info_context->mbmi.interintra_mode;
vp9_build_intra_predictors_internal(xd->dst.y_buffer, xd->dst.y_stride,
intrapredictor, 64, mode, 64,
xd->up_available, xd->left_available,
xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_mode,
ypred, ystride, intrapredictor, 64, 64);
}
void vp9_build_interintra_64x64_predictors_sbuv(MACROBLOCKD *xd,
uint8_t *upred,
uint8_t *vpred,
int uvstride) {
uint8_t uintrapredictor[1024];
uint8_t vintrapredictor[1024];
const int mode = xd->mode_info_context->mbmi.interintra_uv_mode;
vp9_build_intra_predictors_internal(xd->dst.u_buffer, xd->dst.uv_stride,
uintrapredictor, 32, mode, 32,
xd->up_available, xd->left_available,
xd->right_available);
vp9_build_intra_predictors_internal(xd->dst.v_buffer, xd->dst.uv_stride,
vintrapredictor, 32, mode, 32,
xd->up_available, xd->left_available,
xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
upred, uvstride, uintrapredictor, 32, 32);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
vpred, uvstride, vintrapredictor, 32, 32);
}
void vp9_build_interintra_64x64_predictors_sb(MACROBLOCKD *xd,
uint8_t *ypred,
uint8_t *upred,
uint8_t *vpred,
int ystride,
int uvstride) {
vp9_build_interintra_64x64_predictors_sby(xd, ypred, ystride);
vp9_build_interintra_64x64_predictors_sbuv(xd, upred, vpred, uvstride);
}
#endif // CONFIG_COMP_INTERINTRA_PRED
void vp9_build_intra_predictors_mby(MACROBLOCKD *xd) {
vp9_build_intra_predictors_internal(xd->dst.y_buffer, xd->dst.y_stride,
xd->predictor, 16,
xd->mode_info_context->mbmi.mode, 16,
xd->up_available, xd->left_available,
xd->right_available);
}
void vp9_build_intra_predictors_mby_s(MACROBLOCKD *xd) {
vp9_build_intra_predictors_internal(xd->dst.y_buffer, xd->dst.y_stride,
xd->dst.y_buffer, xd->dst.y_stride,
xd->mode_info_context->mbmi.mode, 16,
xd->up_available, xd->left_available,
xd->right_available);
}
void vp9_build_intra_predictors_sby_s(MACROBLOCKD *xd) {
vp9_build_intra_predictors_internal(xd->dst.y_buffer, xd->dst.y_stride,
xd->dst.y_buffer, xd->dst.y_stride,
xd->mode_info_context->mbmi.mode, 32,
xd->up_available, xd->left_available,
xd->right_available);
}
void vp9_build_intra_predictors_sb64y_s(MACROBLOCKD *xd) {
vp9_build_intra_predictors_internal(xd->dst.y_buffer, xd->dst.y_stride,
xd->dst.y_buffer, xd->dst.y_stride,
xd->mode_info_context->mbmi.mode, 64,
xd->up_available, xd->left_available,
xd->right_available);
}
void vp9_build_intra_predictors_mbuv_internal(MACROBLOCKD *xd,
uint8_t *upred_ptr,
uint8_t *vpred_ptr,
int uv_stride,
int mode, int bsize) {
vp9_build_intra_predictors_internal(xd->dst.u_buffer, xd->dst.uv_stride,
upred_ptr, uv_stride, mode, bsize,
xd->up_available, xd->left_available,
xd->right_available);
vp9_build_intra_predictors_internal(xd->dst.v_buffer, xd->dst.uv_stride,
vpred_ptr, uv_stride, mode, bsize,
xd->up_available, xd->left_available,
xd->right_available);
}
void vp9_build_intra_predictors_mbuv(MACROBLOCKD *xd) {
vp9_build_intra_predictors_mbuv_internal(xd, &xd->predictor[256],
&xd->predictor[320], 8,
xd->mode_info_context->mbmi.uv_mode,
8);
}
void vp9_build_intra_predictors_mbuv_s(MACROBLOCKD *xd) {
vp9_build_intra_predictors_mbuv_internal(xd, xd->dst.u_buffer,
xd->dst.v_buffer,
xd->dst.uv_stride,
xd->mode_info_context->mbmi.uv_mode,
8);
}
void vp9_build_intra_predictors_sbuv_s(MACROBLOCKD *xd) {
vp9_build_intra_predictors_mbuv_internal(xd, xd->dst.u_buffer,
xd->dst.v_buffer, xd->dst.uv_stride,
xd->mode_info_context->mbmi.uv_mode,
16);
}
void vp9_build_intra_predictors_sb64uv_s(MACROBLOCKD *xd) {
vp9_build_intra_predictors_mbuv_internal(xd, xd->dst.u_buffer,
xd->dst.v_buffer, xd->dst.uv_stride,
xd->mode_info_context->mbmi.uv_mode,
32);
}
void vp9_intra8x8_predict(MACROBLOCKD *xd,
BLOCKD *b,
int mode,
uint8_t *predictor) {
const int block4x4_idx = (b - xd->block);
const int block_idx = (block4x4_idx >> 2) | !!(block4x4_idx & 2);
const int have_top = (block_idx >> 1) || xd->up_available;
const int have_left = (block_idx & 1) || xd->left_available;
const int have_right = !(block_idx & 1) || xd->right_available;
vp9_build_intra_predictors_internal(*(b->base_dst) + b->dst,
b->dst_stride, predictor, 16,
mode, 8, have_top, have_left,
have_right);
}
void vp9_intra_uv4x4_predict(MACROBLOCKD *xd,
BLOCKD *b,
int mode,
uint8_t *predictor) {
const int block_idx = (b - xd->block) & 3;
const int have_top = (block_idx >> 1) || xd->up_available;
const int have_left = (block_idx & 1) || xd->left_available;
const int have_right = !(block_idx & 1) || xd->right_available;
vp9_build_intra_predictors_internal(*(b->base_dst) + b->dst,
b->dst_stride, predictor, 8,
mode, 4, have_top, have_left,
have_right);
}
/* TODO: try different ways of use Y-UV mode correlation
Current code assumes that a uv 4x4 block use same mode
as corresponding Y 8x8 area
*/
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