ref: 183aeecd7422db5a072aff0eb1be74b31bf789d6
dir: /vp9/common/vp9_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 <stdio.h>
#include "./vpx_config.h"
#include "vp9_rtcd.h"
#include "vp9/common/vp9_reconintra.h"
#include "vpx_mem/vpx_mem.h"
static void d27_predictor(uint8_t *ypred_ptr, int y_stride,
int bw, int bh,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
// first column
for (r = 0; r < bh - 1; ++r) {
ypred_ptr[r * y_stride] = ROUND_POWER_OF_TWO(yleft_col[r] +
yleft_col[r + 1], 1);
}
ypred_ptr[(bh - 1) * y_stride] = yleft_col[bh-1];
ypred_ptr++;
// second column
for (r = 0; r < bh - 2; ++r) {
ypred_ptr[r * y_stride] = ROUND_POWER_OF_TWO(yleft_col[r] +
yleft_col[r + 1] * 2 +
yleft_col[r + 2], 2);
}
ypred_ptr[(bh - 2) * y_stride] = ROUND_POWER_OF_TWO(yleft_col[bh - 2] +
yleft_col[bh - 1] * 3,
2);
ypred_ptr[(bh - 1) * y_stride] = yleft_col[bh-1];
ypred_ptr++;
// rest of last row
for (c = 0; c < bw - 2; ++c) {
ypred_ptr[(bh - 1) * y_stride + c] = yleft_col[bh-1];
}
for (r = bh - 2; r >= 0; --r) {
for (c = 0; c < bw - 2; ++c) {
ypred_ptr[r * y_stride + c] = ypred_ptr[(r + 1) * y_stride + c - 2];
}
}
}
static void d63_predictor(uint8_t *ypred_ptr, int y_stride,
int bw, int bh,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
for (r = 0; r < bh; ++r) {
for (c = 0; c < bw; ++c) {
if (r & 1) {
ypred_ptr[c] = ROUND_POWER_OF_TWO(yabove_row[r/2 + c] +
yabove_row[r/2 + c + 1] * 2 +
yabove_row[r/2 + c + 2], 2);
} else {
ypred_ptr[c] =ROUND_POWER_OF_TWO(yabove_row[r/2 + c] +
yabove_row[r/2+ c + 1], 1);
}
}
ypred_ptr += y_stride;
}
}
static void d45_predictor(uint8_t *ypred_ptr, int y_stride,
int bw, int bh,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
for (r = 0; r < bh; ++r) {
for (c = 0; c < bw; ++c) {
if (r + c + 2 < bw * 2)
ypred_ptr[c] = ROUND_POWER_OF_TWO(yabove_row[r + c] +
yabove_row[r + c + 1] * 2 +
yabove_row[r + c + 2], 2);
else
ypred_ptr[c] = yabove_row[bw * 2 - 1];
}
ypred_ptr += y_stride;
}
}
static void d117_predictor(uint8_t *ypred_ptr, int y_stride,
int bw, int bh,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
// first row
for (c = 0; c < bw; c++)
ypred_ptr[c] = ROUND_POWER_OF_TWO(yabove_row[c - 1] + yabove_row[c], 1);
ypred_ptr += y_stride;
// second row
ypred_ptr[0] = ROUND_POWER_OF_TWO(yleft_col[0] +
yabove_row[-1] * 2 +
yabove_row[0], 2);
for (c = 1; c < bw; c++)
ypred_ptr[c] = ROUND_POWER_OF_TWO(yabove_row[c - 2] +
yabove_row[c - 1] * 2 +
yabove_row[c], 2);
ypred_ptr += y_stride;
// the rest of first col
ypred_ptr[0] = ROUND_POWER_OF_TWO(yabove_row[-1] +
yleft_col[0] * 2 +
yleft_col[1], 2);
for (r = 3; r < bh; ++r)
ypred_ptr[(r-2) * y_stride] = ROUND_POWER_OF_TWO(yleft_col[r - 3] +
yleft_col[r - 2] * 2 +
yleft_col[r - 1], 2);
// the rest of the block
for (r = 2; r < bh; ++r) {
for (c = 1; c < bw; 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 bw, int bh,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
ypred_ptr[0] = ROUND_POWER_OF_TWO(yleft_col[0] +
yabove_row[-1] * 2 +
yabove_row[0], 2);
for (c = 1; c < bw; c++)
ypred_ptr[c] = ROUND_POWER_OF_TWO(yabove_row[c - 2] +
yabove_row[c - 1] * 2 +
yabove_row[c], 2);
ypred_ptr[y_stride] = ROUND_POWER_OF_TWO(yabove_row[-1] +
yleft_col[0] * 2 +
yleft_col[1], 2);
for (r = 2; r < bh - 1; ++r)
ypred_ptr[r * y_stride] = ROUND_POWER_OF_TWO(yleft_col[r - 2] +
yleft_col[r - 1] * 2 +
yleft_col[r + 1], 2);
ypred_ptr[(bh - 1) * y_stride] = ROUND_POWER_OF_TWO(yleft_col[bh - 2] +
yleft_col[bh - 1] * 3,
2);
ypred_ptr += y_stride;
for (r = 1; r < bh; ++r) {
for (c = 1; c < bw; 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 bw, int bh,
uint8_t *yabove_row,
uint8_t *yleft_col) {
int r, c;
ypred_ptr[0] = ROUND_POWER_OF_TWO(yabove_row[-1] + yleft_col[0], 1);
for (r = 1; r < bh; r++)
ypred_ptr[r * y_stride] =
ROUND_POWER_OF_TWO(yleft_col[r - 1] + yleft_col[r], 1);
ypred_ptr++;
ypred_ptr[0] = ROUND_POWER_OF_TWO(yleft_col[0] +
yabove_row[-1] * 2 +
yabove_row[0], 2);
ypred_ptr[y_stride] = ROUND_POWER_OF_TWO(yabove_row[-1] +
yleft_col[0] * 2 +
yleft_col[1], 2);
for (r = 2; r < bh; r++)
ypred_ptr[r * y_stride] = ROUND_POWER_OF_TWO(yleft_col[r - 2] +
yleft_col[r - 1] * 2 +
yleft_col[r], 2);
ypred_ptr++;
for (c = 0; c < bw - 2; c++)
ypred_ptr[c] = ROUND_POWER_OF_TWO(yabove_row[c - 1] +
yabove_row[c] * 2 +
yabove_row[c + 1], 2);
ypred_ptr += y_stride;
for (r = 1; r < bh; ++r) {
for (c = 0; c < bw - 2; c++)
ypred_ptr[c] = ypred_ptr[-y_stride + c - 2];
ypred_ptr += y_stride;
}
}
void vp9_build_intra_predictors(uint8_t *src, int src_stride,
uint8_t *ypred_ptr,
int y_stride, int mode,
int bw, int bh,
int up_available, int left_available,
int right_available) {
int r, c, i;
uint8_t yleft_col[64], yabove_data[129], 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 < bh; i++)
yleft_col[i] = src[i * src_stride - 1];
} else {
vpx_memset(yleft_col, 129, bh);
}
if (up_available) {
uint8_t *yabove_ptr = src - src_stride;
vpx_memcpy(yabove_row, yabove_ptr, bw);
if (bw == 4 && right_available)
vpx_memcpy(yabove_row + bw, yabove_ptr + bw, bw);
else
vpx_memset(yabove_row + bw, yabove_row[bw -1], bw);
ytop_left = left_available ? yabove_ptr[-1] : 129;
} else {
vpx_memset(yabove_row, 127, bw * 2);
ytop_left = 127;
}
yabove_row[-1] = ytop_left;
switch (mode) {
case DC_PRED: {
int i;
int expected_dc = 128;
int average = 0;
int count = 0;
if (up_available || left_available) {
if (up_available) {
for (i = 0; i < bw; i++)
average += yabove_row[i];
count += bw;
}
if (left_available) {
for (i = 0; i < bh; i++)
average += yleft_col[i];
count += bh;
}
expected_dc = (average + (count >> 1)) / count;
}
for (r = 0; r < bh; r++) {
vpx_memset(ypred_ptr, expected_dc, bw);
ypred_ptr += y_stride;
}
}
break;
case V_PRED:
for (r = 0; r < bh; r++) {
vpx_memcpy(ypred_ptr, yabove_row, bw);
ypred_ptr += y_stride;
}
break;
case H_PRED:
for (r = 0; r < bh; r++) {
vpx_memset(ypred_ptr, yleft_col[r], bw);
ypred_ptr += y_stride;
}
break;
case TM_PRED:
for (r = 0; r < bh; r++) {
for (c = 0; c < bw; c++)
ypred_ptr[c] = clip_pixel(yleft_col[r] + yabove_row[c] - ytop_left);
ypred_ptr += y_stride;
}
break;
case D45_PRED:
case D135_PRED:
case D117_PRED:
case D153_PRED:
case D27_PRED:
case D63_PRED:
if (bw == bh) {
switch (mode) {
case D45_PRED:
d45_predictor(ypred_ptr, y_stride, bw, bh, yabove_row, yleft_col);
break;
case D135_PRED:
d135_predictor(ypred_ptr, y_stride, bw, bh, yabove_row, yleft_col);
break;
case D117_PRED:
d117_predictor(ypred_ptr, y_stride, bw, bh, yabove_row, yleft_col);
break;
case D153_PRED:
d153_predictor(ypred_ptr, y_stride, bw, bh, yabove_row, yleft_col);
break;
case D27_PRED:
d27_predictor(ypred_ptr, y_stride, bw, bh, yabove_row, yleft_col);
break;
case D63_PRED:
d63_predictor(ypred_ptr, y_stride, bw, bh, yabove_row, yleft_col);
break;
default:
assert(0);
}
} else if (bw > bh) {
uint8_t pred[64*64];
vpx_memset(yleft_col + bh, yleft_col[bh - 1], bw - bh);
switch (mode) {
case D45_PRED:
d45_predictor(pred, 64, bw, bw, yabove_row, yleft_col);
break;
case D135_PRED:
d135_predictor(pred, 64, bw, bw, yabove_row, yleft_col);
break;
case D117_PRED:
d117_predictor(pred, 64, bw, bw, yabove_row, yleft_col);
break;
case D153_PRED:
d153_predictor(pred, 64, bw, bw, yabove_row, yleft_col);
break;
case D27_PRED:
d27_predictor(pred, 64, bw, bw, yabove_row, yleft_col);
break;
case D63_PRED:
d63_predictor(pred, 64, bw, bw, yabove_row, yleft_col);
break;
default:
assert(0);
}
for (i = 0; i < bh; i++)
vpx_memcpy(ypred_ptr + y_stride * i, pred + i * 64, bw);
} else {
uint8_t pred[64 * 64];
vpx_memset(yabove_row + bw * 2, yabove_row[bw * 2 - 1], (bh - bw) * 2);
switch (mode) {
case D45_PRED:
d45_predictor(pred, 64, bh, bh, yabove_row, yleft_col);
break;
case D135_PRED:
d135_predictor(pred, 64, bh, bh, yabove_row, yleft_col);
break;
case D117_PRED:
d117_predictor(pred, 64, bh, bh, yabove_row, yleft_col);
break;
case D153_PRED:
d153_predictor(pred, 64, bh, bh, yabove_row, yleft_col);
break;
case D27_PRED:
d27_predictor(pred, 64, bh, bh, yabove_row, yleft_col);
break;
case D63_PRED:
d63_predictor(pred, 64, bh, bh, yabove_row, yleft_col);
break;
default:
assert(0);
}
for (i = 0; i < bh; i++)
vpx_memcpy(ypred_ptr + y_stride * i, pred + i * 64, bw);
}
break;
default:
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 bw, int bh) {
// 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 = MAX(bw, bh);
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 < bh; ++i) {
for (j = 0; j < bw; ++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 < bh; ++i) {
for (j = 0; j < bw; ++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 < bh; ++i) {
for (j = 0; j < bw; ++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 < bh; ++i) {
for (j = 0; j < bw; ++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 < bh; ++i) {
for (j = 0; j < bw; ++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 < bh; ++i) {
for (j = 0; j < bw; ++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 < bh; ++i) {
for (j = 0; j < bw; ++j) {
int k = i * interstride + j;
interpred[k] = (interpred[k] + intrapred[i * intrastride + j]) >> 1;
}
}
break;
}
}
void vp9_build_interintra_predictors(MACROBLOCKD *xd,
uint8_t *ypred,
uint8_t *upred,
uint8_t *vpred,
int ystride, int uvstride,
BLOCK_SIZE_TYPE bsize) {
vp9_build_interintra_predictors_sby(xd, ypred, ystride, bsize);
vp9_build_interintra_predictors_sbuv(xd, upred, vpred, uvstride, bsize);
}
void vp9_build_interintra_predictors_sby(MACROBLOCKD *xd,
uint8_t *ypred,
int ystride,
BLOCK_SIZE_TYPE bsize) {
int bwl = mi_width_log2(bsize), bw = MI_SIZE << bwl;
int bhl = mi_height_log2(bsize), bh = MI_SIZE << bhl;
uint8_t intrapredictor[4096];
vp9_build_intra_predictors(
xd->plane[0].dst.buf, xd->plane[0].dst.stride,
intrapredictor, bw,
xd->mode_info_context->mbmi.interintra_mode, bw, bh,
xd->up_available, xd->left_available, xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_mode,
ypred, ystride, intrapredictor, bw, bw, bh);
}
void vp9_build_interintra_predictors_sbuv(MACROBLOCKD *xd,
uint8_t *upred,
uint8_t *vpred,
int uvstride,
BLOCK_SIZE_TYPE bsize) {
int bwl = mi_width_log2(bsize), bw = MI_UV_SIZE << bwl;
int bhl = mi_height_log2(bsize), bh = MI_UV_SIZE << bhl;
uint8_t uintrapredictor[1024];
uint8_t vintrapredictor[1024];
vp9_build_intra_predictors(
xd->plane[1].dst.buf, xd->plane[1].dst.stride,
uintrapredictor, bw,
xd->mode_info_context->mbmi.interintra_uv_mode, bw, bh,
xd->up_available, xd->left_available, xd->right_available);
vp9_build_intra_predictors(
xd->plane[2].dst.buf, xd->plane[1].dst.stride,
vintrapredictor, bw,
xd->mode_info_context->mbmi.interintra_uv_mode, bw, bh,
xd->up_available, xd->left_available, xd->right_available);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
upred, uvstride, uintrapredictor, bw, bw, bh);
combine_interintra(xd->mode_info_context->mbmi.interintra_uv_mode,
vpred, uvstride, vintrapredictor, bw, bw, bh);
}
#endif // CONFIG_COMP_INTERINTRA_PRED
void vp9_build_intra_predictors_sby_s(MACROBLOCKD *xd,
BLOCK_SIZE_TYPE bsize) {
const int bwl = b_width_log2(bsize), bw = 4 << bwl;
const int bhl = b_height_log2(bsize), bh = 4 << bhl;
vp9_build_intra_predictors(xd->plane[0].dst.buf, xd->plane[0].dst.stride,
xd->plane[0].dst.buf, xd->plane[0].dst.stride,
xd->mode_info_context->mbmi.mode,
bw, bh,
xd->up_available, xd->left_available,
0 /*xd->right_available*/);
}
void vp9_build_intra_predictors_sbuv_s(MACROBLOCKD *xd,
BLOCK_SIZE_TYPE bsize) {
const int bwl = b_width_log2(bsize), bw = 2 << bwl;
const int bhl = b_height_log2(bsize), bh = 2 << bhl;
vp9_build_intra_predictors(xd->plane[1].dst.buf, xd->plane[1].dst.stride,
xd->plane[1].dst.buf, xd->plane[1].dst.stride,
xd->mode_info_context->mbmi.uv_mode,
bw, bh, xd->up_available,
xd->left_available, 0 /*xd->right_available*/);
vp9_build_intra_predictors(xd->plane[2].dst.buf, xd->plane[1].dst.stride,
xd->plane[2].dst.buf, xd->plane[1].dst.stride,
xd->mode_info_context->mbmi.uv_mode,
bw, bh, xd->up_available,
xd->left_available, 0 /*xd->right_available*/);
}
#if !CONFIG_SB8X8
void vp9_intra8x8_predict(MACROBLOCKD *xd,
int block4x4_idx,
int mode,
uint8_t *predictor, int pre_stride) {
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(predictor, pre_stride,
predictor, pre_stride,
mode, 8, 8, have_top, have_left,
have_right);
}
#endif
#if !CONFIG_NEWBINTRAMODES
void vp9_intra4x4_predict(MACROBLOCKD *xd,
int block_idx,
int mode,
uint8_t *predictor, int pre_stride) {
const int have_top =
(block_idx >> (2 >> CONFIG_SB8X8)) || xd->up_available;
const int have_left =
(block_idx & (3 >> CONFIG_SB8X8)) || xd->left_available;
const int have_right =
((block_idx & (3 >> CONFIG_SB8X8)) != (3 >> CONFIG_SB8X8));
vp9_build_intra_predictors(predictor, pre_stride,
predictor, pre_stride,
mode, 4, 4, have_top, have_left,
have_right);
}
#endif
#if !CONFIG_SB8X8
void vp9_intra_uv4x4_predict(MACROBLOCKD *xd,
int block4x4_idx,
int mode,
uint8_t *predictor, int pre_stride) {
const int block_idx = block4x4_idx & 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);
vp9_build_intra_predictors(predictor, pre_stride,
predictor, pre_stride,
mode, 4, 4, have_top, have_left,
have_right);
}
#endif