ref: 9b769e47f411ab30303cf8f0ca67723e5f915c49
dir: /vpx_dsp/intrapred.c/
/*
* Copyright (c) 2015 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_dsp_rtcd.h"
#include "vpx_dsp/vpx_dsp_common.h"
#include "vpx_mem/vpx_mem.h"
#define DST(x, y) dst[(x) + (y) * stride]
#define AVG3(a, b, c) (((a) + 2 * (b) + (c) + 2) >> 2)
#define AVG2(a, b) (((a) + (b) + 1) >> 1)
static INLINE void d207_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r, c;
(void) above;
// first column
for (r = 0; r < bs - 1; ++r)
dst[r * stride] = AVG2(left[r], left[r + 1]);
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// second column
for (r = 0; r < bs - 2; ++r)
dst[r * stride] = AVG3(left[r], left[r + 1], left[r + 2]);
dst[(bs - 2) * stride] = AVG3(left[bs - 2], left[bs - 1], left[bs - 1]);
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// rest of last row
for (c = 0; c < bs - 2; ++c)
dst[(bs - 1) * stride + c] = left[bs - 1];
for (r = bs - 2; r >= 0; --r)
for (c = 0; c < bs - 2; ++c)
dst[r * stride + c] = dst[(r + 1) * stride + c - 2];
}
static INLINE void d63_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r, c;
int size;
(void)left;
for (c = 0; c < bs; ++c) {
dst[c] = AVG2(above[c], above[c + 1]);
dst[stride + c] = AVG3(above[c], above[c + 1], above[c + 2]);
}
for (r = 2, size = bs - 2; r < bs; r += 2, --size) {
memcpy(dst + (r + 0) * stride, dst + (r >> 1), size);
memset(dst + (r + 0) * stride + size, above[bs - 1], bs - size);
memcpy(dst + (r + 1) * stride, dst + stride + (r >> 1), size);
memset(dst + (r + 1) * stride + size, above[bs - 1], bs - size);
}
}
static INLINE void d45_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
const uint8_t above_right = above[bs - 1];
const uint8_t *const dst_row0 = dst;
int x, size;
(void)left;
for (x = 0; x < bs - 1; ++x) {
dst[x] = AVG3(above[x], above[x + 1], above[x + 2]);
}
dst[bs - 1] = above_right;
dst += stride;
for (x = 1, size = bs - 2; x < bs; ++x, --size) {
memcpy(dst, dst_row0 + x, size);
memset(dst + size, above_right, x + 1);
dst += stride;
}
}
static INLINE void d117_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r, c;
// first row
for (c = 0; c < bs; c++)
dst[c] = AVG2(above[c - 1], above[c]);
dst += stride;
// second row
dst[0] = AVG3(left[0], above[-1], above[0]);
for (c = 1; c < bs; c++)
dst[c] = AVG3(above[c - 2], above[c - 1], above[c]);
dst += stride;
// the rest of first col
dst[0] = AVG3(above[-1], left[0], left[1]);
for (r = 3; r < bs; ++r)
dst[(r - 2) * stride] = AVG3(left[r - 3], left[r - 2], left[r - 1]);
// the rest of the block
for (r = 2; r < bs; ++r) {
for (c = 1; c < bs; c++)
dst[c] = dst[-2 * stride + c - 1];
dst += stride;
}
}
static INLINE void d135_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r, c;
dst[0] = AVG3(left[0], above[-1], above[0]);
for (c = 1; c < bs; c++)
dst[c] = AVG3(above[c - 2], above[c - 1], above[c]);
dst[stride] = AVG3(above[-1], left[0], left[1]);
for (r = 2; r < bs; ++r)
dst[r * stride] = AVG3(left[r - 2], left[r - 1], left[r]);
dst += stride;
for (r = 1; r < bs; ++r) {
for (c = 1; c < bs; c++)
dst[c] = dst[-stride + c - 1];
dst += stride;
}
}
static INLINE void d153_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r, c;
dst[0] = AVG2(above[-1], left[0]);
for (r = 1; r < bs; r++)
dst[r * stride] = AVG2(left[r - 1], left[r]);
dst++;
dst[0] = AVG3(left[0], above[-1], above[0]);
dst[stride] = AVG3(above[-1], left[0], left[1]);
for (r = 2; r < bs; r++)
dst[r * stride] = AVG3(left[r - 2], left[r - 1], left[r]);
dst++;
for (c = 0; c < bs - 2; c++)
dst[c] = AVG3(above[c - 1], above[c], above[c + 1]);
dst += stride;
for (r = 1; r < bs; ++r) {
for (c = 0; c < bs - 2; c++)
dst[c] = dst[-stride + c - 2];
dst += stride;
}
}
static INLINE void v_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r;
(void) left;
for (r = 0; r < bs; r++) {
memcpy(dst, above, bs);
dst += stride;
}
}
static INLINE void h_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r;
(void) above;
for (r = 0; r < bs; r++) {
memset(dst, left[r], bs);
dst += stride;
}
}
static INLINE void tm_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r, c;
int ytop_left = above[-1];
for (r = 0; r < bs; r++) {
for (c = 0; c < bs; c++)
dst[c] = clip_pixel(left[r] + above[c] - ytop_left);
dst += stride;
}
}
static INLINE void dc_128_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int r;
(void) above;
(void) left;
for (r = 0; r < bs; r++) {
memset(dst, 128, bs);
dst += stride;
}
}
static INLINE void dc_left_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above,
const uint8_t *left) {
int i, r, expected_dc, sum = 0;
(void) above;
for (i = 0; i < bs; i++)
sum += left[i];
expected_dc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++) {
memset(dst, expected_dc, bs);
dst += stride;
}
}
static INLINE void dc_top_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int i, r, expected_dc, sum = 0;
(void) left;
for (i = 0; i < bs; i++)
sum += above[i];
expected_dc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++) {
memset(dst, expected_dc, bs);
dst += stride;
}
}
static INLINE void dc_predictor(uint8_t *dst, ptrdiff_t stride, int bs,
const uint8_t *above, const uint8_t *left) {
int i, r, expected_dc, sum = 0;
const int count = 2 * bs;
for (i = 0; i < bs; i++) {
sum += above[i];
sum += left[i];
}
expected_dc = (sum + (count >> 1)) / count;
for (r = 0; r < bs; r++) {
memset(dst, expected_dc, bs);
dst += stride;
}
}
void vpx_d207_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const int I = left[0];
const int J = left[1];
const int K = left[2];
const int L = left[3];
(void)above;
DST(0, 0) = AVG2(I, J);
DST(2, 0) = DST(0, 1) = AVG2(J, K);
DST(2, 1) = DST(0, 2) = AVG2(K, L);
DST(1, 0) = AVG3(I, J, K);
DST(3, 0) = DST(1, 1) = AVG3(J, K, L);
DST(3, 1) = DST(1, 2) = AVG3(K, L, L);
DST(3, 2) = DST(2, 2) =
DST(0, 3) = DST(1, 3) = DST(2, 3) = DST(3, 3) = L;
}
void vpx_d63_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const int A = above[0];
const int B = above[1];
const int C = above[2];
const int D = above[3];
const int E = above[4];
const int F = above[5];
const int G = above[6];
(void)left;
DST(0, 0) = AVG2(A, B);
DST(1, 0) = DST(0, 2) = AVG2(B, C);
DST(2, 0) = DST(1, 2) = AVG2(C, D);
DST(3, 0) = DST(2, 2) = AVG2(D, E);
DST(3, 2) = AVG2(E, F); // differs from vp8
DST(0, 1) = AVG3(A, B, C);
DST(1, 1) = DST(0, 3) = AVG3(B, C, D);
DST(2, 1) = DST(1, 3) = AVG3(C, D, E);
DST(3, 1) = DST(2, 3) = AVG3(D, E, F);
DST(3, 3) = AVG3(E, F, G); // differs from vp8
}
void vpx_d45_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const int A = above[0];
const int B = above[1];
const int C = above[2];
const int D = above[3];
const int E = above[4];
const int F = above[5];
const int G = above[6];
const int H = above[7];
(void)stride;
(void)left;
DST(0, 0) = AVG3(A, B, C);
DST(1, 0) = DST(0, 1) = AVG3(B, C, D);
DST(2, 0) = DST(1, 1) = DST(0, 2) = AVG3(C, D, E);
DST(3, 0) = DST(2, 1) = DST(1, 2) = DST(0, 3) = AVG3(D, E, F);
DST(3, 1) = DST(2, 2) = DST(1, 3) = AVG3(E, F, G);
DST(3, 2) = DST(2, 3) = AVG3(F, G, H);
DST(3, 3) = H; // differs from vp8
}
void vpx_d117_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const int I = left[0];
const int J = left[1];
const int K = left[2];
const int X = above[-1];
const int A = above[0];
const int B = above[1];
const int C = above[2];
const int D = above[3];
DST(0, 0) = DST(1, 2) = AVG2(X, A);
DST(1, 0) = DST(2, 2) = AVG2(A, B);
DST(2, 0) = DST(3, 2) = AVG2(B, C);
DST(3, 0) = AVG2(C, D);
DST(0, 3) = AVG3(K, J, I);
DST(0, 2) = AVG3(J, I, X);
DST(0, 1) = DST(1, 3) = AVG3(I, X, A);
DST(1, 1) = DST(2, 3) = AVG3(X, A, B);
DST(2, 1) = DST(3, 3) = AVG3(A, B, C);
DST(3, 1) = AVG3(B, C, D);
}
void vpx_d135_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const int I = left[0];
const int J = left[1];
const int K = left[2];
const int L = left[3];
const int X = above[-1];
const int A = above[0];
const int B = above[1];
const int C = above[2];
const int D = above[3];
(void)stride;
DST(0, 3) = AVG3(J, K, L);
DST(1, 3) = DST(0, 2) = AVG3(I, J, K);
DST(2, 3) = DST(1, 2) = DST(0, 1) = AVG3(X, I, J);
DST(3, 3) = DST(2, 2) = DST(1, 1) = DST(0, 0) = AVG3(A, X, I);
DST(3, 2) = DST(2, 1) = DST(1, 0) = AVG3(B, A, X);
DST(3, 1) = DST(2, 0) = AVG3(C, B, A);
DST(3, 0) = AVG3(D, C, B);
}
void vpx_d153_predictor_4x4_c(uint8_t *dst, ptrdiff_t stride,
const uint8_t *above, const uint8_t *left) {
const int I = left[0];
const int J = left[1];
const int K = left[2];
const int L = left[3];
const int X = above[-1];
const int A = above[0];
const int B = above[1];
const int C = above[2];
DST(0, 0) = DST(2, 1) = AVG2(I, X);
DST(0, 1) = DST(2, 2) = AVG2(J, I);
DST(0, 2) = DST(2, 3) = AVG2(K, J);
DST(0, 3) = AVG2(L, K);
DST(3, 0) = AVG3(A, B, C);
DST(2, 0) = AVG3(X, A, B);
DST(1, 0) = DST(3, 1) = AVG3(I, X, A);
DST(1, 1) = DST(3, 2) = AVG3(J, I, X);
DST(1, 2) = DST(3, 3) = AVG3(K, J, I);
DST(1, 3) = AVG3(L, K, J);
}
#if CONFIG_VP9_HIGHBITDEPTH
static INLINE void highbd_d207_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
(void) above;
(void) bd;
// First column.
for (r = 0; r < bs - 1; ++r) {
dst[r * stride] = AVG2(left[r], left[r + 1]);
}
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// Second column.
for (r = 0; r < bs - 2; ++r) {
dst[r * stride] = AVG3(left[r], left[r + 1], left[r + 2]);
}
dst[(bs - 2) * stride] = AVG3(left[bs - 2], left[bs - 1], left[bs - 1]);
dst[(bs - 1) * stride] = left[bs - 1];
dst++;
// Rest of last row.
for (c = 0; c < bs - 2; ++c)
dst[(bs - 1) * stride + c] = left[bs - 1];
for (r = bs - 2; r >= 0; --r) {
for (c = 0; c < bs - 2; ++c)
dst[r * stride + c] = dst[(r + 1) * stride + c - 2];
}
}
static INLINE void highbd_d63_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
(void) left;
(void) bd;
for (r = 0; r < bs; ++r) {
for (c = 0; c < bs; ++c) {
dst[c] = r & 1 ? AVG3(above[(r >> 1) + c], above[(r >> 1) + c + 1],
above[(r >> 1) + c + 2])
: AVG2(above[(r >> 1) + c], above[(r >> 1) + c + 1]);
}
dst += stride;
}
}
static INLINE void highbd_d45_predictor(uint16_t *dst, ptrdiff_t stride, int bs,
const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
(void) left;
(void) bd;
for (r = 0; r < bs; ++r) {
for (c = 0; c < bs; ++c) {
dst[c] = r + c + 2 < bs * 2 ? AVG3(above[r + c], above[r + c + 1],
above[r + c + 2])
: above[bs * 2 - 1];
}
dst += stride;
}
}
static INLINE void highbd_d117_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
(void) bd;
// first row
for (c = 0; c < bs; c++)
dst[c] = AVG2(above[c - 1], above[c]);
dst += stride;
// second row
dst[0] = AVG3(left[0], above[-1], above[0]);
for (c = 1; c < bs; c++)
dst[c] = AVG3(above[c - 2], above[c - 1], above[c]);
dst += stride;
// the rest of first col
dst[0] = AVG3(above[-1], left[0], left[1]);
for (r = 3; r < bs; ++r)
dst[(r - 2) * stride] = AVG3(left[r - 3], left[r - 2], left[r - 1]);
// the rest of the block
for (r = 2; r < bs; ++r) {
for (c = 1; c < bs; c++)
dst[c] = dst[-2 * stride + c - 1];
dst += stride;
}
}
static INLINE void highbd_d135_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
(void) bd;
dst[0] = AVG3(left[0], above[-1], above[0]);
for (c = 1; c < bs; c++)
dst[c] = AVG3(above[c - 2], above[c - 1], above[c]);
dst[stride] = AVG3(above[-1], left[0], left[1]);
for (r = 2; r < bs; ++r)
dst[r * stride] = AVG3(left[r - 2], left[r - 1], left[r]);
dst += stride;
for (r = 1; r < bs; ++r) {
for (c = 1; c < bs; c++)
dst[c] = dst[-stride + c - 1];
dst += stride;
}
}
static INLINE void highbd_d153_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
(void) bd;
dst[0] = AVG2(above[-1], left[0]);
for (r = 1; r < bs; r++)
dst[r * stride] = AVG2(left[r - 1], left[r]);
dst++;
dst[0] = AVG3(left[0], above[-1], above[0]);
dst[stride] = AVG3(above[-1], left[0], left[1]);
for (r = 2; r < bs; r++)
dst[r * stride] = AVG3(left[r - 2], left[r - 1], left[r]);
dst++;
for (c = 0; c < bs - 2; c++)
dst[c] = AVG3(above[c - 1], above[c], above[c + 1]);
dst += stride;
for (r = 1; r < bs; ++r) {
for (c = 0; c < bs - 2; c++)
dst[c] = dst[-stride + c - 2];
dst += stride;
}
}
static INLINE void highbd_v_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r;
(void) left;
(void) bd;
for (r = 0; r < bs; r++) {
memcpy(dst, above, bs * sizeof(uint16_t));
dst += stride;
}
}
static INLINE void highbd_h_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r;
(void) above;
(void) bd;
for (r = 0; r < bs; r++) {
vpx_memset16(dst, left[r], bs);
dst += stride;
}
}
static INLINE void highbd_tm_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r, c;
int ytop_left = above[-1];
(void) bd;
for (r = 0; r < bs; r++) {
for (c = 0; c < bs; c++)
dst[c] = clip_pixel_highbd(left[r] + above[c] - ytop_left, bd);
dst += stride;
}
}
static INLINE void highbd_dc_128_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int r;
(void) above;
(void) left;
for (r = 0; r < bs; r++) {
vpx_memset16(dst, 128 << (bd - 8), bs);
dst += stride;
}
}
static INLINE void highbd_dc_left_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int i, r, expected_dc, sum = 0;
(void) above;
(void) bd;
for (i = 0; i < bs; i++)
sum += left[i];
expected_dc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++) {
vpx_memset16(dst, expected_dc, bs);
dst += stride;
}
}
static INLINE void highbd_dc_top_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int i, r, expected_dc, sum = 0;
(void) left;
(void) bd;
for (i = 0; i < bs; i++)
sum += above[i];
expected_dc = (sum + (bs >> 1)) / bs;
for (r = 0; r < bs; r++) {
vpx_memset16(dst, expected_dc, bs);
dst += stride;
}
}
static INLINE void highbd_dc_predictor(uint16_t *dst, ptrdiff_t stride,
int bs, const uint16_t *above,
const uint16_t *left, int bd) {
int i, r, expected_dc, sum = 0;
const int count = 2 * bs;
(void) bd;
for (i = 0; i < bs; i++) {
sum += above[i];
sum += left[i];
}
expected_dc = (sum + (count >> 1)) / count;
for (r = 0; r < bs; r++) {
vpx_memset16(dst, expected_dc, bs);
dst += stride;
}
}
#endif // CONFIG_VP9_HIGHBITDEPTH
// This serves as a wrapper function, so that all the prediction functions
// can be unified and accessed as a pointer array. Note that the boundary
// above and left are not necessarily used all the time.
#define intra_pred_sized(type, size) \
void vpx_##type##_predictor_##size##x##size##_c(uint8_t *dst, \
ptrdiff_t stride, \
const uint8_t *above, \
const uint8_t *left) { \
type##_predictor(dst, stride, size, above, left); \
}
#if CONFIG_VP9_HIGHBITDEPTH
#define intra_pred_highbd_sized(type, size) \
void vpx_highbd_##type##_predictor_##size##x##size##_c( \
uint16_t *dst, ptrdiff_t stride, const uint16_t *above, \
const uint16_t *left, int bd) { \
highbd_##type##_predictor(dst, stride, size, above, left, bd); \
}
#define intra_pred_allsizes(type) \
intra_pred_sized(type, 4) \
intra_pred_sized(type, 8) \
intra_pred_sized(type, 16) \
intra_pred_sized(type, 32) \
intra_pred_highbd_sized(type, 4) \
intra_pred_highbd_sized(type, 8) \
intra_pred_highbd_sized(type, 16) \
intra_pred_highbd_sized(type, 32)
#define intra_pred_no_4x4(type) \
intra_pred_sized(type, 8) \
intra_pred_sized(type, 16) \
intra_pred_sized(type, 32) \
intra_pred_highbd_sized(type, 4) \
intra_pred_highbd_sized(type, 8) \
intra_pred_highbd_sized(type, 16) \
intra_pred_highbd_sized(type, 32)
#else
#define intra_pred_allsizes(type) \
intra_pred_sized(type, 4) \
intra_pred_sized(type, 8) \
intra_pred_sized(type, 16) \
intra_pred_sized(type, 32)
#define intra_pred_no_4x4(type) \
intra_pred_sized(type, 8) \
intra_pred_sized(type, 16) \
intra_pred_sized(type, 32)
#endif // CONFIG_VP9_HIGHBITDEPTH
intra_pred_no_4x4(d207)
intra_pred_no_4x4(d63)
intra_pred_no_4x4(d45)
intra_pred_no_4x4(d117)
intra_pred_no_4x4(d135)
intra_pred_no_4x4(d153)
intra_pred_allsizes(v)
intra_pred_allsizes(h)
intra_pred_allsizes(tm)
intra_pred_allsizes(dc_128)
intra_pred_allsizes(dc_left)
intra_pred_allsizes(dc_top)
intra_pred_allsizes(dc)
#undef intra_pred_allsizes