ref: e2d329fbeb0084432041782902a82f9cea884cbe
dir: /src/ipred.c/
/*
* Copyright © 2018, VideoLAN and dav1d authors
* Copyright © 2018, Two Orioles, LLC
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "common/intops.h"
#include "src/ipred.h"
#define sz_grid(l_fn) \
l_fn( 4, 4) \
l_fn( 4, 8) \
l_fn( 4, 16) \
l_fn( 8, 4) \
l_fn( 8, 8) \
l_fn( 8, 16) \
l_fn( 8, 32) \
l_fn(16, 4) \
l_fn(16, 8) \
l_fn(16, 16) \
l_fn(16, 32) \
l_fn(16, 64) \
l_fn(32, 8) \
l_fn(32, 16) \
l_fn(32, 32) \
l_fn(32, 64) \
l_fn(64, 16) \
l_fn(64, 32) \
l_fn(64, 64)
static __attribute__((noinline)) void
splat_dc_c(pixel *dst, const ptrdiff_t stride,
const int w, const int h, const unsigned dc)
{
assert(dc <= (1 << BITDEPTH) - 1);
#if BITDEPTH == 8
if (w > 4) {
const uint64_t dcN = dc * 0x0101010101010101ULL;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x += sizeof(dcN))
*((uint64_t *) &dst[x]) = dcN;
dst += PXSTRIDE(stride);
}
} else {
const unsigned dcN = dc * 0x01010101U;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x += sizeof(dcN))
*((unsigned *) &dst[x]) = dcN;
dst += PXSTRIDE(stride);
}
}
#else
const uint64_t dcN = dc * 0x0001000100010001ULL;
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x += sizeof(dcN) >> 1)
*((uint64_t *) &dst[x]) = dcN;
dst += PXSTRIDE(stride);
}
#endif
}
#define dc_lfn(w, h, dir, dc_gen) \
static void dc##dir##_##w##x##h##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, const int a) \
{ \
dc_gen; \
splat_dc_c(dst, stride, w, h, dc); \
}
#define dc1d_lfns(width, height, sh1, sh2) \
dc_lfn(width, height, top, unsigned dc = width >> 1; \
for (int i = 0; i < width; i++) \
dc += topleft[1 + i]; \
dc >>= sh1) \
dc_lfn(width, height, left, unsigned dc = height >> 1; \
for (int i = 0; i < height; i++) \
dc += topleft[-(1 + i)]; \
dc >>= sh2)
dc1d_lfns( 4, 4, 2, 2)
dc1d_lfns( 4, 8, 2, 3)
dc1d_lfns( 4, 16, 2, 4)
dc1d_lfns( 8, 4, 3, 2)
dc1d_lfns( 8, 8, 3, 3)
dc1d_lfns( 8, 16, 3, 4)
dc1d_lfns( 8, 32, 3, 5)
dc1d_lfns(16, 4, 4, 2)
dc1d_lfns(16, 8, 4, 3)
dc1d_lfns(16, 16, 4, 4)
dc1d_lfns(16, 32, 4, 5)
dc1d_lfns(16, 64, 4, 6)
dc1d_lfns(32, 8, 5, 3)
dc1d_lfns(32, 16, 5, 4)
dc1d_lfns(32, 32, 5, 5)
dc1d_lfns(32, 64, 5, 6)
dc1d_lfns(64, 16, 6, 4)
dc1d_lfns(64, 32, 6, 5)
dc1d_lfns(64, 64, 6, 6)
#define dc2d_lfn(width, height, dc_gen) \
dc_lfn(width, height,, unsigned dc = (width + height) >> 1; \
for (int i = 0; i < width; i++) \
dc += topleft[i + 1]; \
for (int i = 0; i < height; i++) \
dc += topleft[-(i + 1)]; \
dc_gen)
#if BITDEPTH == 8
#define MULTIPLIER_1x2 0x5556
#define MULTIPLIER_1x4 0x3334
#define BASE_SHIFT 16
#else
#define MULTIPLIER_1x2 0xAAAB
#define MULTIPLIER_1x4 0x6667
#define BASE_SHIFT 17
#endif
dc2d_lfn( 4, 4, dc >>= 3)
dc2d_lfn( 4, 8, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 2)))
dc2d_lfn( 4, 16, dc = iclip_pixel(MULTIPLIER_1x4 * dc >> (BASE_SHIFT + 2)))
dc2d_lfn( 8, 4, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 2)))
dc2d_lfn( 8, 8, dc >>= 4)
dc2d_lfn( 8, 16, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 3)))
dc2d_lfn( 8, 32, dc = iclip_pixel(MULTIPLIER_1x4 * dc >> (BASE_SHIFT + 3)))
dc2d_lfn(16, 4, dc = iclip_pixel(MULTIPLIER_1x4 * dc >> (BASE_SHIFT + 2)))
dc2d_lfn(16, 8, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 3)))
dc2d_lfn(16, 16, dc >>= 5)
dc2d_lfn(16, 32, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 4)))
dc2d_lfn(16, 64, dc = iclip_pixel(MULTIPLIER_1x4 * dc >> (BASE_SHIFT + 4)))
dc2d_lfn(32, 8, dc = iclip_pixel(MULTIPLIER_1x4 * dc >> (BASE_SHIFT + 3)))
dc2d_lfn(32, 16, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 4)))
dc2d_lfn(32, 32, dc >>= 6)
dc2d_lfn(32, 64, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 5)))
dc2d_lfn(64, 16, dc = iclip_pixel(MULTIPLIER_1x4 * dc >> (BASE_SHIFT + 4)))
dc2d_lfn(64, 32, dc = iclip_pixel(MULTIPLIER_1x2 * dc >> (BASE_SHIFT + 5)))
dc2d_lfn(64, 64, dc >>= 7)
#undef MULTIPLIER_1x2
#undef MULTIPLIER_1x4
#undef BASE_SHIFT
#define dc128_lfn(width, height) \
dc_lfn(width, height, 128, const unsigned dc = (1 << BITDEPTH) >> 1)
sz_grid(dc128_lfn)
static __attribute__((noinline)) void
v_c(pixel *dst, const ptrdiff_t stride,
const pixel *const topleft, const int width, const int height)
{
for (int y = 0; y < height; y++) {
pixel_copy(dst, topleft + 1, width);
dst += PXSTRIDE(stride);
}
}
#define v_lfn(width, height) \
static void v_##width##x##height##_##c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, const int a) \
{ \
v_c(dst, stride, topleft, width, height); \
}
sz_grid(v_lfn)
static __attribute__((noinline)) void
h_c(pixel *dst, const ptrdiff_t stride,
const pixel *const topleft, const int width, const int height)
{
for (int y = 0; y < height; y++) {
pixel_set(dst, topleft[-(1 + y)], width);
dst += PXSTRIDE(stride);
}
}
#define h_lfn(width, height) \
static void h_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, const int a) \
{ \
h_c(dst, stride, topleft, width, height); \
}
sz_grid(h_lfn)
static __attribute__((noinline)) void
paeth_c(pixel *dst, const ptrdiff_t stride, const pixel *const tl_ptr,
const int width, const int height)
{
const int topleft = tl_ptr[0];
for (int y = 0; y < height; y++) {
const int left = tl_ptr[-(y + 1)];
for (int x = 0; x < width; x++) {
const int top = tl_ptr[1 + x];
const int base = left + top - topleft;
const int ldiff = abs(left - base);
const int tdiff = abs(top - base);
const int tldiff = abs(topleft - base);
dst[x] = ldiff <= tdiff && ldiff <= tldiff ? left :
tdiff <= tldiff ? top : topleft;
}
dst += PXSTRIDE(stride);
}
}
#define paeth_lfn(width, height) \
static void paeth_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int a) \
{ \
paeth_c(dst, stride, topleft, width, height); \
}
sz_grid(paeth_lfn)
static const uint8_t sm_weight_arrays[] = {
// Unused, because we always offset by bs, which is at least 2.
0, 0,
// bs = 2
255, 128,
// bs = 4
255, 149, 85, 64,
// bs = 8
255, 197, 146, 105, 73, 50, 37, 32,
// bs = 16
255, 225, 196, 170, 145, 123, 102, 84, 68, 54, 43, 33, 26, 20, 17, 16,
// bs = 32
255, 240, 225, 210, 196, 182, 169, 157, 145, 133, 122, 111, 101, 92, 83, 74,
66, 59, 52, 45, 39, 34, 29, 25, 21, 17, 14, 12, 10, 9, 8, 8,
// bs = 64
255, 248, 240, 233, 225, 218, 210, 203, 196, 189, 182, 176, 169, 163, 156,
150, 144, 138, 133, 127, 121, 116, 111, 106, 101, 96, 91, 86, 82, 77, 73, 69,
65, 61, 57, 54, 50, 47, 44, 41, 38, 35, 32, 29, 27, 25, 22, 20, 18, 16, 15,
13, 12, 10, 9, 8, 7, 6, 6, 5, 5, 4, 4, 4,
};
static __attribute__((noinline)) void
smooth_c(pixel *dst, const ptrdiff_t stride, const pixel *const topleft,
const int width, const int height)
{
const uint8_t *const weights_hor = &sm_weight_arrays[width];
const uint8_t *const weights_ver = &sm_weight_arrays[height];
const int right = topleft[width], bottom = topleft[-height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
const int pred = weights_ver[y] * topleft[1 + x] +
(256 - weights_ver[y]) * bottom +
weights_hor[x] * topleft[-(1 + y)] +
(256 - weights_hor[x]) * right;
dst[x] = (pred + 256) >> 9;
}
dst += PXSTRIDE(stride);
}
}
#define smooth_lfn(width, height) \
static void smooth_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int a) \
{ \
smooth_c(dst, stride, topleft, width, height); \
}
sz_grid(smooth_lfn)
static __attribute__((noinline)) void
smooth_v_c(pixel *dst, const ptrdiff_t stride, const pixel *const topleft,
const int width, const int height)
{
const uint8_t *const weights_ver = &sm_weight_arrays[height];
const int bottom = topleft[-height];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
const int pred = weights_ver[y] * topleft[1 + x] +
(256 - weights_ver[y]) * bottom;
dst[x] = (pred + 128) >> 8;
}
dst += PXSTRIDE(stride);
}
}
#define smooth_v_lfn(width, height) \
static void smooth_v_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int a) \
{ \
smooth_v_c(dst, stride, topleft, width, height); \
}
sz_grid(smooth_v_lfn)
static __attribute__((noinline)) void
smooth_h_c(pixel *dst, const ptrdiff_t stride, const pixel *const topleft,
const int width, const int height)
{
const uint8_t *const weights_hor = &sm_weight_arrays[width];
const int right = topleft[width];
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
const int pred = weights_hor[x] * topleft[-(y + 1)] +
(256 - weights_hor[x]) * right;
dst[x] = (pred + 128) >> 8;
}
dst += PXSTRIDE(stride);
}
}
#define smooth_h_lfn(width, height) \
static void smooth_h_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int a) \
{ \
smooth_h_c(dst, stride, topleft, width, height); \
}
sz_grid(smooth_h_lfn)
static const int16_t dr_intra_derivative[90] = {
// More evenly spread out angles and limited to 10-bit
// Values that are 0 will never be used
// Approx angle
0, 0, 0, //
1023, 0, 0, // 3, ...
547, 0, 0, // 6, ...
372, 0, 0, 0, 0, // 9, ...
273, 0, 0, // 14, ...
215, 0, 0, // 17, ...
178, 0, 0, // 20, ...
151, 0, 0, // 23, ... (113 & 203 are base angles)
132, 0, 0, // 26, ...
116, 0, 0, // 29, ...
102, 0, 0, 0, // 32, ...
90, 0, 0, // 36, ...
80, 0, 0, // 39, ...
71, 0, 0, // 42, ...
64, 0, 0, // 45, ... (45 & 135 are base angles)
57, 0, 0, // 48, ...
51, 0, 0, // 51, ...
45, 0, 0, 0, // 54, ...
40, 0, 0, // 58, ...
35, 0, 0, // 61, ...
31, 0, 0, // 64, ...
27, 0, 0, // 67, ... (67 & 157 are base angles)
23, 0, 0, // 70, ...
19, 0, 0, // 73, ...
15, 0, 0, 0, 0, // 76, ...
11, 0, 0, // 81, ...
7, 0, 0, // 84, ...
3, 0, 0, // 87, ...
};
static int get_filter_strength(const unsigned blk_wh, const unsigned d,
const int type)
{
int strength = 0;
if (type == 0) {
if (blk_wh <= 8) {
if (d >= 56) strength = 1;
} else if (blk_wh <= 12) {
if (d >= 40) strength = 1;
} else if (blk_wh <= 16) {
if (d >= 40) strength = 1;
} else if (blk_wh <= 24) {
if (d >= 8) strength = 1;
if (d >= 16) strength = 2;
if (d >= 32) strength = 3;
} else if (blk_wh <= 32) {
if (d >= 1) strength = 1;
if (d >= 4) strength = 2;
if (d >= 32) strength = 3;
} else {
if (d >= 1) strength = 3;
}
} else {
if (blk_wh <= 8) {
if (d >= 40) strength = 1;
if (d >= 64) strength = 2;
} else if (blk_wh <= 16) {
if (d >= 20) strength = 1;
if (d >= 48) strength = 2;
} else if (blk_wh <= 24) {
if (d >= 4) strength = 3;
} else {
if (d >= 1) strength = 3;
}
}
return strength;
}
static void filter_edge(pixel *const out, const int sz,
const pixel *const in, const int from, const int to,
const unsigned strength)
{
const uint8_t kernel[3][5] = {
{ 0, 4, 8, 4, 0 },
{ 0, 5, 6, 5, 0 },
{ 2, 4, 4, 4, 2 }
};
assert(strength > 0);
for (int i = 0; i < sz; i++) {
int s = 0;
for (int j = 0; j < 5; j++)
s += in[iclip(i - 2 + j, from, to - 1)] * kernel[strength - 1][j];
out[i] = (s + 8) >> 4;
}
}
static int get_upsample(const int blk_wh, const unsigned d, const int type) {
if (d >= 40) return 0;
return type ? (blk_wh <= 8) : (blk_wh <= 16);
}
static void upsample_edge(pixel *const out, const int hsz,
const pixel *const in, const int from, const int to)
{
const int8_t kernel[4] = { -1, 9, 9, -1 };
int i;
for (i = 0; i < hsz - 1; i++) {
out[i * 2] = in[iclip(i, from, to - 1)];
int s = 0;
for (int j = 0; j < 4; j++)
s += in[iclip(i + j - 1, from, to - 1)] * kernel[j];
out[i * 2 + 1] = iclip_pixel((s + 8) >> 4);
}
out[i * 2] = in[iclip(i, from, to - 1)];
}
static __attribute__((noinline)) void
z1_c(pixel *dst, const ptrdiff_t stride, const pixel *const topleft_in,
int angle, const int width, const int height)
{
const int is_sm = angle >> 9;
angle &= 511;
assert(angle < 90);
const int dx = dr_intra_derivative[angle];
pixel top_out[(64 + 64) * 2];
const pixel *top;
int max_base_x;
const int upsample_above = get_upsample(width + height, 90 - angle, is_sm);
if (upsample_above) {
upsample_edge(top_out, width + height,
&topleft_in[1], -1, width + imin(width, height));
top = top_out;
max_base_x = 2 * (width + height) - 2;
} else {
const int filter_strength =
get_filter_strength(width + height, 90 - angle, is_sm);
if (filter_strength) {
filter_edge(top_out, width + height,
&topleft_in[1], -1, width + imin(width, height),
filter_strength);
top = top_out;
max_base_x = width + height - 1;
} else {
top = &topleft_in[1];
max_base_x = width + imin(width, height) - 1;
}
}
const int frac_bits = 6 - upsample_above;
const int base_inc = 1 << upsample_above;
for (int y = 0, xpos = dx; y < height;
y++, dst += PXSTRIDE(stride), xpos += dx)
{
int base = xpos >> frac_bits;
const int frac = ((xpos << upsample_above) & 0x3F) >> 1;
for (int x = 0; x < width; x++, base += base_inc) {
if (base < max_base_x) {
const int v = top[base] * (32 - frac) + top[base + 1] * frac;
dst[x] = iclip_pixel((v + 16) >> 5);
} else {
pixel_set(&dst[x], top[max_base_x], width - x);
break;
}
}
}
}
#define z1_lfn(width, height) \
static void z1_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int angle) \
{ \
z1_c(dst, stride, topleft, angle, width, height); \
}
sz_grid(z1_lfn)
static __attribute__((noinline)) void
z2_c(pixel *dst, const ptrdiff_t stride, const pixel *const topleft_in,
int angle, const int width, const int height)
{
const int is_sm = angle >> 9;
angle &= 511;
assert(angle > 90 && angle < 180);
const int dy = dr_intra_derivative[angle - 90];
const int dx = dr_intra_derivative[180 - angle];
const int upsample_left = get_upsample(width + height, 180 - angle, is_sm);
const int upsample_above = get_upsample(width + height, angle - 90, is_sm);
pixel edge[64 * 2 + 64 * 2 + 1];
pixel *const topleft = &edge[height * 2];
if (upsample_above) {
upsample_edge(topleft, width + 1, topleft_in, 0, width + 1);
} else {
const int filter_strength =
get_filter_strength(width + height, angle - 90, is_sm);
if (filter_strength) {
filter_edge(&topleft[1], width, &topleft_in[1], -1, width,
filter_strength);
} else {
pixel_copy(&topleft[1], &topleft_in[1], width);
}
}
if (upsample_left) {
upsample_edge(edge, height + 1, &topleft_in[-height], 0, height + 1);
} else {
const int filter_strength =
get_filter_strength(width + height, 180 - angle, is_sm);
if (filter_strength) {
filter_edge(&topleft[-height], height, &topleft_in[-height],
0, height + 1, filter_strength);
} else {
pixel_copy(&topleft[-height], &topleft_in[-height], height);
}
}
*topleft = *topleft_in;
const int min_base_x = -(1 << upsample_above);
const int frac_bits_y = 6 - upsample_left, frac_bits_x = 6 - upsample_above;
const int base_inc_x = 1 << upsample_above;
const pixel *const left = &topleft[-(1 << upsample_left)];
const pixel *const top = &topleft[1 << upsample_above];
for (int y = 0, xpos = -dx; y < height;
y++, xpos -= dx, dst += PXSTRIDE(stride))
{
int base_x = xpos >> frac_bits_x;
const int frac_x = ((xpos * (1 << upsample_above)) & 0x3F) >> 1;
for (int x = 0, ypos = (y << 6) - dy; x < width;
x++, base_x += base_inc_x, ypos -= dy)
{
int v;
if (base_x >= min_base_x) {
v = top[base_x] * (32 - frac_x) + top[base_x + 1] * frac_x;
} else {
const int base_y = ypos >> frac_bits_y;
assert(base_y >= -(1 << upsample_left));
const int frac_y = ((ypos * (1 << upsample_left)) & 0x3F) >> 1;
v = left[-base_y] * (32 - frac_y) + left[-(base_y + 1)] * frac_y;
}
dst[x] = iclip_pixel((v + 16) >> 5);
}
}
}
#define z2_lfn(width, height) \
static void z2_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int angle) \
{ \
z2_c(dst, stride, topleft, angle, width, height); \
}
sz_grid(z2_lfn)
static __attribute__((noinline)) void
z3_c(pixel *dst, const ptrdiff_t stride, const pixel *const topleft_in,
int angle, const int width, const int height)
{
const int is_sm = angle >> 9;
angle &= 511;
assert(angle > 180);
const int dy = dr_intra_derivative[270 - angle];
pixel left_out[(64 + 64) * 2];
const pixel *left;
int max_base_y;
const int upsample_left = get_upsample(width + height, angle - 180, is_sm);
if (upsample_left) {
upsample_edge(left_out, width + height,
&topleft_in[-(width + height)],
imax(width - height, 0), width + height + 1);
left = &left_out[2 * (width + height) - 2];
max_base_y = 2 * (width + height) - 2;
} else {
const int filter_strength =
get_filter_strength(width + height, angle - 180, is_sm);
if (filter_strength) {
filter_edge(left_out, width + height,
&topleft_in[-(width + height)],
imax(width - height, 0), width + height + 1,
filter_strength);
left = &left_out[width + height - 1];
max_base_y = width + height - 1;
} else {
left = &topleft_in[-1];
max_base_y = height + imin(width, height) - 1;
}
}
const int frac_bits = 6 - upsample_left;
const int base_inc = 1 << upsample_left;
for (int x = 0, ypos = dy; x < width; x++, ypos += dy) {
int base = ypos >> frac_bits;
const int frac = ((ypos << upsample_left) & 0x3F) >> 1;
for (int y = 0; y < height; y++, base += base_inc) {
if (base < max_base_y) {
const int v = left[-base] * (32 - frac) +
left[-(base + 1)] * frac;
dst[y * PXSTRIDE(stride) + x] = iclip_pixel((v + 16) >> 5);
} else {
do {
dst[y * PXSTRIDE(stride) + x] = left[-max_base_y];
} while (++y < height);
break;
}
}
}
}
#define z3_lfn(width, height) \
static void z3_##width##x##height##_c(pixel *dst, const ptrdiff_t stride, \
const pixel *const topleft, \
const int angle) \
{ \
z3_c(dst, stride, topleft, angle, width, height); \
}
sz_grid(z3_lfn)
static const int8_t av1_filter_intra_taps[5][8][8] = {
{
{ -6, 10, 0, 0, 0, 12, 0, 0 },
{ -5, 2, 10, 0, 0, 9, 0, 0 },
{ -3, 1, 1, 10, 0, 7, 0, 0 },
{ -3, 1, 1, 2, 10, 5, 0, 0 },
{ -4, 6, 0, 0, 0, 2, 12, 0 },
{ -3, 2, 6, 0, 0, 2, 9, 0 },
{ -3, 2, 2, 6, 0, 2, 7, 0 },
{ -3, 1, 2, 2, 6, 3, 5, 0 },
}, {
{ -10, 16, 0, 0, 0, 10, 0, 0 },
{ -6, 0, 16, 0, 0, 6, 0, 0 },
{ -4, 0, 0, 16, 0, 4, 0, 0 },
{ -2, 0, 0, 0, 16, 2, 0, 0 },
{ -10, 16, 0, 0, 0, 0, 10, 0 },
{ -6, 0, 16, 0, 0, 0, 6, 0 },
{ -4, 0, 0, 16, 0, 0, 4, 0 },
{ -2, 0, 0, 0, 16, 0, 2, 0 },
}, {
{ -8, 8, 0, 0, 0, 16, 0, 0 },
{ -8, 0, 8, 0, 0, 16, 0, 0 },
{ -8, 0, 0, 8, 0, 16, 0, 0 },
{ -8, 0, 0, 0, 8, 16, 0, 0 },
{ -4, 4, 0, 0, 0, 0, 16, 0 },
{ -4, 0, 4, 0, 0, 0, 16, 0 },
{ -4, 0, 0, 4, 0, 0, 16, 0 },
{ -4, 0, 0, 0, 4, 0, 16, 0 },
}, {
{ -2, 8, 0, 0, 0, 10, 0, 0 },
{ -1, 3, 8, 0, 0, 6, 0, 0 },
{ -1, 2, 3, 8, 0, 4, 0, 0 },
{ 0, 1, 2, 3, 8, 2, 0, 0 },
{ -1, 4, 0, 0, 0, 3, 10, 0 },
{ -1, 3, 4, 0, 0, 4, 6, 0 },
{ -1, 2, 3, 4, 0, 4, 4, 0 },
{ -1, 2, 2, 3, 4, 3, 3, 0 },
}, {
{ -12, 14, 0, 0, 0, 14, 0, 0 },
{ -10, 0, 14, 0, 0, 12, 0, 0 },
{ -9, 0, 0, 14, 0, 11, 0, 0 },
{ -8, 0, 0, 0, 14, 10, 0, 0 },
{ -10, 12, 0, 0, 0, 0, 14, 0 },
{ -9, 1, 12, 0, 0, 0, 12, 0 },
{ -8, 0, 0, 12, 0, 1, 11, 0 },
{ -7, 0, 0, 1, 12, 1, 9, 0 },
},
};
static __attribute__((noinline)) void
filter_intra_c(pixel *dst, const ptrdiff_t stride,
const pixel *const topleft_in,
int filt_idx, const int width, const int height)
{
filt_idx &= 511;
assert(filt_idx < 5);
const int8_t (*const filter)[8] = av1_filter_intra_taps[filt_idx];
int x, y;
ptrdiff_t left_stride;
const pixel *left, *topleft, *top;
top = &topleft_in[1];
for (y = 0; y < height; y += 2) {
topleft = &topleft_in[-y];
left = &topleft[-1];
left_stride = -1;
for (x = 0; x < width; x += 4) {
const int p0 = *topleft;
const int p1 = top[0], p2 = top[1], p3 = top[2], p4 = top[3];
const int p5 = left[0 * left_stride], p6 = left[1 * left_stride];
pixel *ptr = &dst[x];
const int8_t (*flt_ptr)[8] = filter;
for (int yy = 0; yy < 2; yy++) {
for (int xx = 0; xx < 4; xx++, flt_ptr++) {
int acc = flt_ptr[0][0] * p0 + flt_ptr[0][1] * p1 +
flt_ptr[0][2] * p2 + flt_ptr[0][3] * p3 +
flt_ptr[0][4] * p4 + flt_ptr[0][5] * p5 +
flt_ptr[0][6] * p6;
ptr[xx] = iclip_pixel((acc + 8) >> 4);
}
ptr += PXSTRIDE(stride);
}
left = &dst[x + 4 - 1];
left_stride = PXSTRIDE(stride);
top += 4;
topleft = &top[-1];
}
top = &dst[PXSTRIDE(stride)];
dst = &dst[PXSTRIDE(stride) * 2];
}
}
#define filter_lfn(width, height) \
static void filter_##width##x##height##_c(pixel *const dst, \
const ptrdiff_t stride, \
const pixel *const topleft, \
const int filt_idx) \
{ \
filter_intra_c(dst, stride, topleft, filt_idx, width, height); \
}
filter_lfn( 4, 4)
filter_lfn( 8, 4)
filter_lfn(16, 4)
filter_lfn( 4, 8)
filter_lfn( 8, 8)
filter_lfn(16, 8)
filter_lfn(32, 8)
filter_lfn( 4, 16)
filter_lfn( 8, 16)
filter_lfn(16, 16)
filter_lfn(32, 16)
filter_lfn( 8, 32)
filter_lfn(16, 32)
filter_lfn(32, 32)
static __attribute__((noinline)) void
cfl_ac_c(int16_t *ac, const pixel *ypx, const ptrdiff_t stride,
const int w_pad, const int h_pad, const int width, const int height,
const int ss_hor, const int ss_ver, const int log2sz)
{
int y, x;
int16_t *const ac_orig = ac;
assert(w_pad >= 0 && w_pad * 4 < width);
assert(h_pad >= 0 && h_pad * 4 < height);
for (y = 0; y < height - 4 * h_pad; y++) {
for (x = 0; x < width - 4 * w_pad; x++) {
int ac_sum = ypx[x << ss_hor];
if (ss_hor) ac_sum += ypx[x * 2 + 1];
if (ss_ver) {
ac_sum += ypx[(x << ss_hor) + PXSTRIDE(stride)];
if (ss_hor) ac_sum += ypx[x * 2 + 1 + PXSTRIDE(stride)];
}
ac[x] = ac_sum << (1 + !ss_ver + !ss_hor);
}
for (; x < width; x++)
ac[x] = ac[x - 1];
ac += width;
ypx += PXSTRIDE(stride) << ss_ver;
}
for (; y < height; y++) {
memcpy(ac, &ac[-width], width * sizeof(*ac));
ac += width;
}
int sum = (1 << log2sz) >> 1;
for (ac = ac_orig, y = 0; y < height; y++) {
for (x = 0; x < width; x++)
sum += ac[x];
ac += width;
}
sum >>= log2sz;
// subtract DC
for (ac = ac_orig, y = 0; y < height; y++) {
for (x = 0; x < width; x++)
ac[x] -= sum;
ac += width;
}
}
#define cfl_ac_fn(lw, lh, cw, ch, ss_hor, ss_ver, log2sz) \
static void cfl_ac_##lw##x##lh##_to_##cw##x##ch##_c(int16_t *const ac, \
const pixel *const ypx, \
const ptrdiff_t stride, \
const int w_pad, \
const int h_pad) \
{ \
cfl_ac_c(ac, ypx, stride, w_pad, h_pad, cw, ch, ss_hor, ss_ver, log2sz); \
}
cfl_ac_fn( 8, 8, 4, 4, 1, 1, 4)
cfl_ac_fn( 8, 16, 4, 8, 1, 1, 5)
cfl_ac_fn( 8, 32, 4, 16, 1, 1, 6)
cfl_ac_fn(16, 8, 8, 4, 1, 1, 5)
cfl_ac_fn(16, 16, 8, 8, 1, 1, 6)
cfl_ac_fn(16, 32, 8, 16, 1, 1, 7)
cfl_ac_fn(32, 8, 16, 4, 1, 1, 6)
cfl_ac_fn(32, 16, 16, 8, 1, 1, 7)
cfl_ac_fn(32, 32, 16, 16, 1, 1, 8)
cfl_ac_fn( 8, 4, 4, 4, 1, 0, 4)
cfl_ac_fn( 8, 8, 4, 8, 1, 0, 5)
cfl_ac_fn(16, 4, 8, 4, 1, 0, 5)
cfl_ac_fn(16, 8, 8, 8, 1, 0, 6)
cfl_ac_fn(16, 16, 8, 16, 1, 0, 7)
cfl_ac_fn(32, 8, 16, 8, 1, 0, 7)
cfl_ac_fn(32, 16, 16, 16, 1, 0, 8)
cfl_ac_fn(32, 32, 16, 32, 1, 0, 9)
cfl_ac_fn( 4, 4, 4, 4, 0, 0, 4)
cfl_ac_fn( 4, 8, 4, 8, 0, 0, 5)
cfl_ac_fn( 4, 16, 4, 16, 0, 0, 6)
cfl_ac_fn( 8, 4, 8, 4, 0, 0, 5)
cfl_ac_fn( 8, 8, 8, 8, 0, 0, 6)
cfl_ac_fn( 8, 16, 8, 16, 0, 0, 7)
cfl_ac_fn( 8, 32, 8, 32, 0, 0, 8)
cfl_ac_fn(16, 4, 16, 4, 0, 0, 6)
cfl_ac_fn(16, 8, 16, 8, 0, 0, 7)
cfl_ac_fn(16, 16, 16, 16, 0, 0, 8)
cfl_ac_fn(16, 32, 16, 32, 0, 0, 9)
cfl_ac_fn(32, 8, 32, 8, 0, 0, 8)
cfl_ac_fn(32, 16, 32, 16, 0, 0, 9)
cfl_ac_fn(32, 32, 32, 32, 0, 0, 10)
static __attribute__((noinline)) void
cfl_pred_c(pixel *dstU, pixel *dstV, const ptrdiff_t stride,
const int16_t *ac, const pixel *const dc_pred,
const int8_t *const alphas, const int width, const int height)
{
for (int y = 0; y < height; y++) {
for (int x = 0; x < width; x++) {
const int diff1 = alphas[0] * ac[x];
dstU[x] = iclip_pixel(dc_pred[ 0] + apply_sign((abs(diff1) + 32) >> 6,
diff1));
const int diff2 = alphas[1] * ac[x];
dstV[x] = iclip_pixel(dc_pred[32] + apply_sign((abs(diff2) + 32) >> 6,
diff2));
}
ac += width;
dstU += PXSTRIDE(stride);
dstV += PXSTRIDE(stride);
}
}
#define cfl_pred_fn(width) \
static void cfl_pred_##width##xN_c(pixel *const dstU, \
pixel *const dstV, \
const ptrdiff_t stride, \
const int16_t *const ac, \
const pixel *const dc_pred, \
const int8_t *const alphas, \
const int height) \
{ \
cfl_pred_c(dstU, dstV, stride, ac, dc_pred, alphas, width, height); \
}
cfl_pred_fn( 4)
cfl_pred_fn( 8)
cfl_pred_fn(16)
cfl_pred_fn(32)
static void pal_pred_c(pixel *dst, const ptrdiff_t stride,
const uint16_t *const pal, const uint8_t *idx,
const int w, const int h)
{
for (int y = 0; y < h; y++) {
for (int x = 0; x < w; x++)
dst[x] = pal[idx[x]];
idx += w;
dst += PXSTRIDE(stride);
}
}
void bitfn(dav1d_intra_pred_dsp_init)(Dav1dIntraPredDSPContext *const c) {
#define assign_lfn(w, h, p1, p2, pfx) \
c->intra_pred[pfx##TX_##w##X##h][p1##_PRED] = p2##_##w##x##h##_c
#define assign_fns(p1, p2) \
assign_lfn( 4, 4, p1, p2,); \
assign_lfn( 4, 8, p1, p2, R); \
assign_lfn( 4, 16, p1, p2, R); \
assign_lfn( 8, 4, p1, p2, R); \
assign_lfn( 8, 8, p1, p2,); \
assign_lfn( 8, 16, p1, p2, R); \
assign_lfn( 8, 32, p1, p2, R); \
assign_lfn(16, 4, p1, p2, R); \
assign_lfn(16, 8, p1, p2, R); \
assign_lfn(16, 16, p1, p2,); \
assign_lfn(16, 32, p1, p2, R); \
assign_lfn(16, 64, p1, p2, R); \
assign_lfn(32, 8, p1, p2, R); \
assign_lfn(32, 16, p1, p2, R); \
assign_lfn(32, 32, p1, p2,); \
assign_lfn(32, 64, p1, p2, R); \
assign_lfn(64, 16, p1, p2, R); \
assign_lfn(64, 32, p1, p2, R); \
assign_lfn(64, 64, p1, p2,); \
assign_fns(DC, dc);
assign_fns(DC_128, dc128);
assign_fns(TOP_DC, dctop);
assign_fns(LEFT_DC, dcleft);
assign_fns(HOR, h);
assign_fns(VERT, v);
assign_fns(PAETH, paeth);
assign_fns(SMOOTH, smooth);
assign_fns(SMOOTH_V, smooth_v);
assign_fns(SMOOTH_H, smooth_h);
assign_fns(Z1, z1);
assign_fns(Z2, z2);
assign_fns(Z3, z3);
assign_lfn( 4, 4, FILTER, filter,);
assign_lfn( 8, 4, FILTER, filter, R);
assign_lfn(16, 4, FILTER, filter, R);
assign_lfn( 4, 8, FILTER, filter, R);
assign_lfn( 8, 8, FILTER, filter,);
assign_lfn(16, 8, FILTER, filter, R);
assign_lfn(32, 8, FILTER, filter, R);
assign_lfn( 4, 16, FILTER, filter, R);
assign_lfn( 8, 16, FILTER, filter, R);
assign_lfn(16, 16, FILTER, filter,);
assign_lfn(32, 16, FILTER, filter, R);
assign_lfn( 8, 32, FILTER, filter, R);
assign_lfn(16, 32, FILTER, filter, R);
assign_lfn(32, 32, FILTER, filter,);
// cfl functions are split per chroma subsampling type
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][ TX_4X4 ] = cfl_ac_8x8_to_4x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][RTX_4X8 ] = cfl_ac_8x16_to_4x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][RTX_4X16 ] = cfl_ac_8x32_to_4x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][RTX_8X4 ] = cfl_ac_16x8_to_8x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][ TX_8X8 ] = cfl_ac_16x16_to_8x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][RTX_8X16 ] = cfl_ac_16x32_to_8x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][RTX_16X4 ] = cfl_ac_32x8_to_16x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][RTX_16X8 ] = cfl_ac_32x16_to_16x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I420 - 1][ TX_16X16] = cfl_ac_32x32_to_16x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][ TX_4X4 ] = cfl_ac_8x4_to_4x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][RTX_4X8 ] = cfl_ac_8x8_to_4x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][RTX_8X4 ] = cfl_ac_16x4_to_8x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][ TX_8X8 ] = cfl_ac_16x8_to_8x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][RTX_8X16 ] = cfl_ac_16x16_to_8x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][RTX_16X8 ] = cfl_ac_32x8_to_16x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][ TX_16X16] = cfl_ac_32x16_to_16x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I422 - 1][RTX_16X32] = cfl_ac_32x32_to_16x32_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][ TX_4X4 ] = cfl_ac_4x4_to_4x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_4X8 ] = cfl_ac_4x8_to_4x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_4X16 ] = cfl_ac_4x16_to_4x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_8X4 ] = cfl_ac_8x4_to_8x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][ TX_8X8 ] = cfl_ac_8x8_to_8x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_8X16 ] = cfl_ac_8x16_to_8x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_8X32 ] = cfl_ac_8x32_to_8x32_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_16X4 ] = cfl_ac_16x4_to_16x4_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_16X8 ] = cfl_ac_16x8_to_16x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][ TX_16X16] = cfl_ac_16x16_to_16x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_16X32] = cfl_ac_16x32_to_16x32_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_32X8 ] = cfl_ac_32x8_to_32x8_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][RTX_32X16] = cfl_ac_32x16_to_32x16_c;
c->cfl_ac[DAV1D_PIXEL_LAYOUT_I444 - 1][ TX_32X32] = cfl_ac_32x32_to_32x32_c;
c->cfl_pred[0] = cfl_pred_4xN_c;
c->cfl_pred[1] = cfl_pred_8xN_c;
c->cfl_pred[2] = cfl_pred_16xN_c;
c->cfl_pred[3] = cfl_pred_32xN_c;
c->pal_pred = pal_pred_c;
}