ref: 204d1b70587ef3698bcce1e337da934532dd65b5
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 "vp9/common/vp9_onyxc_int.h"
#include "vpx_mem/vpx_mem.h"
const TX_TYPE mode2txfm_map[MB_MODE_COUNT] = {
DCT_DCT, // DC
ADST_DCT, // V
DCT_ADST, // H
DCT_DCT, // D45
ADST_ADST, // D135
ADST_DCT, // D117
DCT_ADST, // D153
DCT_ADST, // D27
ADST_DCT, // D63
ADST_ADST, // TM
DCT_DCT, // NEARESTMV
DCT_DCT, // NEARMV
DCT_DCT, // ZEROMV
DCT_DCT // NEWMV
};
void vp9_d27_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
// first column
for (r = 0; r < bs - 1; ++r) {
ypred_ptr[r * y_stride] = ROUND_POWER_OF_TWO(yleft_col[r] +
yleft_col[r + 1], 1);
}
ypred_ptr[(bs - 1) * y_stride] = yleft_col[bs - 1];
ypred_ptr++;
// second column
for (r = 0; r < bs - 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[(bs - 2) * y_stride] = ROUND_POWER_OF_TWO(yleft_col[bs - 2] +
yleft_col[bs - 1] * 3,
2);
ypred_ptr[(bs - 1) * y_stride] = yleft_col[bs - 1];
ypred_ptr++;
// rest of last row
for (c = 0; c < bs - 2; ++c) {
ypred_ptr[(bs - 1) * y_stride + c] = yleft_col[bs - 1];
}
for (r = bs - 2; r >= 0; --r) {
for (c = 0; c < bs - 2; ++c) {
ypred_ptr[r * y_stride + c] = ypred_ptr[(r + 1) * y_stride + c - 2];
}
}
}
void vp9_d63_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
for (r = 0; r < bs; ++r) {
for (c = 0; c < bs; ++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;
}
}
void vp9_d45_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
for (r = 0; r < bs; ++r) {
for (c = 0; c < bs; ++c) {
if (r + c + 2 < bs * 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[bs * 2 - 1];
}
ypred_ptr += y_stride;
}
}
void vp9_d117_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
// first row
for (c = 0; c < bs; 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 < bs; 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 < bs; ++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 < bs; ++r) {
for (c = 1; c < bs; c++)
ypred_ptr[c] = ypred_ptr[-2 * y_stride + c - 1];
ypred_ptr += y_stride;
}
}
void vp9_d135_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
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 < bs; 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 < bs; ++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 += y_stride;
for (r = 1; r < bs; ++r) {
for (c = 1; c < bs; c++)
ypred_ptr[c] = ypred_ptr[-y_stride + c - 1];
ypred_ptr += y_stride;
}
}
void vp9_d153_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
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 < bs; 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 < bs; 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 < bs - 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 < bs; ++r) {
for (c = 0; c < bs - 2; c++)
ypred_ptr[c] = ypred_ptr[-y_stride + c - 2];
ypred_ptr += y_stride;
}
}
void vp9_v_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r;
for (r = 0; r < bs; r++) {
vpx_memcpy(ypred_ptr, yabove_row, bs);
ypred_ptr += y_stride;
}
}
void vp9_h_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r;
for (r = 0; r < bs; r++) {
vpx_memset(ypred_ptr, yleft_col[r], bs);
ypred_ptr += y_stride;
}
}
void vp9_tm_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r, c;
int ytop_left = yabove_row[-1];
for (r = 0; r < bs; r++) {
for (c = 0; c < bs; c++)
ypred_ptr[c] = clip_pixel(yleft_col[r] + yabove_row[c] - ytop_left);
ypred_ptr += y_stride;
}
}
void vp9_dc_128_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int r;
for (r = 0; r < bs; r++) {
vpx_memset(ypred_ptr, 128, bs);
ypred_ptr += y_stride;
}
}
void vp9_dc_left_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int i, r;
int expected_dc = 128;
int average = 0;
const int count = bs;
for (i = 0; i < bs; i++)
average += yleft_col[i];
expected_dc = (average + (count >> 1)) / count;
for (r = 0; r < bs; r++) {
vpx_memset(ypred_ptr, expected_dc, bs);
ypred_ptr += y_stride;
}
}
void vp9_dc_top_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int i, r;
int expected_dc = 128;
int average = 0;
const int count = bs;
for (i = 0; i < bs; i++)
average += yabove_row[i];
expected_dc = (average + (count >> 1)) / count;
for (r = 0; r < bs; r++) {
vpx_memset(ypred_ptr, expected_dc, bs);
ypred_ptr += y_stride;
}
}
void vp9_dc_predictor_c(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col) {
int i, r;
int expected_dc = 128;
int average = 0;
const int count = 2 * bs;
for (i = 0; i < bs; i++)
average += yabove_row[i];
for (i = 0; i < bs; i++)
average += yleft_col[i];
expected_dc = (average + (count >> 1)) / count;
for (r = 0; r < bs; r++) {
vpx_memset(ypred_ptr, expected_dc, bs);
ypred_ptr += y_stride;
}
}
typedef void (*intra_pred_fn)(uint8_t *ypred_ptr, int y_stride, int bs,
uint8_t *yabove_row, uint8_t *yleft_col);
static void build_intra_predictors(uint8_t *src, int src_stride,
uint8_t *ypred_ptr, int y_stride,
MB_PREDICTION_MODE mode, int bs,
int up_available, int left_available,
int right_available) {
int i;
DECLARE_ALIGNED_ARRAY(16, uint8_t, yleft_col, 64);
DECLARE_ALIGNED_ARRAY(16, uint8_t, yabove_data, 128 + 16);
uint8_t *yabove_row = yabove_data + 16;
static const intra_pred_fn pred[VP9_INTRA_MODES] = {
NULL, vp9_v_predictor, vp9_h_predictor, vp9_d45_predictor,
vp9_d135_predictor, vp9_d117_predictor, vp9_d153_predictor,
vp9_d27_predictor, vp9_d63_predictor, vp9_tm_predictor
};
// 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 < bs; i++)
yleft_col[i] = src[i * src_stride - 1];
} else {
vpx_memset(yleft_col, 129, bs);
}
if (up_available) {
uint8_t *yabove_ptr = src - src_stride;
if (bs == 4 && right_available && left_available) {
yabove_row = yabove_ptr;
} else {
vpx_memcpy(yabove_row, yabove_ptr, bs);
if (bs == 4 && right_available)
vpx_memcpy(yabove_row + bs, yabove_ptr + bs, bs);
else
vpx_memset(yabove_row + bs, yabove_row[bs - 1], bs);
yabove_row[-1] = left_available ? yabove_ptr[-1] : 129;
}
} else {
vpx_memset(yabove_row, 127, bs * 2);
yabove_row[-1] = 127;
}
if (mode == DC_PRED) {
if (left_available) {
if (up_available) {
vp9_dc_predictor(ypred_ptr, y_stride, bs, yabove_row, yleft_col);
} else {
vp9_dc_left_predictor(ypred_ptr, y_stride, bs, yabove_row, yleft_col);
}
} else if (up_available) {
vp9_dc_top_predictor(ypred_ptr, y_stride, bs, yabove_row, yleft_col);
} else {
vp9_dc_128_predictor(ypred_ptr, y_stride, bs, yabove_row, yleft_col);
}
} else {
pred[mode](ypred_ptr, y_stride, bs, yabove_row, yleft_col);
}
}
void vp9_predict_intra_block(MACROBLOCKD *xd,
int block_idx,
int bwl_in,
TX_SIZE tx_size,
int mode,
uint8_t *reference, int ref_stride,
uint8_t *predictor, int pre_stride) {
const int bwl = bwl_in - tx_size;
const int wmask = (1 << bwl) - 1;
const int have_top = (block_idx >> bwl) || xd->up_available;
const int have_left = (block_idx & wmask) || xd->left_available;
const int have_right = ((block_idx & wmask) != wmask);
const int txfm_block_size = 4 << tx_size;
assert(bwl >= 0);
build_intra_predictors(reference, ref_stride,
predictor, pre_stride,
mode,
txfm_block_size,
have_top, have_left,
have_right);
}