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/*
* Copyright 2020 Google LLC
*
*/
/*
* Copyright (c) 2020, Alliance for Open Media. All rights reserved
*
* This source code is subject to the terms of the BSD 2 Clause License and
* the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
* was not distributed with this source code in the LICENSE file, you can
* obtain it at www.aomedia.org/license/software. If the Alliance for Open
* Media Patent License 1.0 was not distributed with this source code in the
* PATENTS file, you can obtain it at www.aomedia.org/license/patent.
*/
#include "inter_common.h"
#define SubblockW 4
#define SubblockH 4
#define OutputShift 7
#define OffsetBits 21
#define OutputRoundAdd ((1 << (OutputShift - 1)) + (1 << OffsetBits))
#define OutputSub ((1 << (OffsetBits - OutputShift)) + (1 << (OffsetBits - OutputShift - 1)))
#define RoundFinal 4
#define DistBits 4
#define PixelMax 1023
#define LocalStride 20
int blend(int src0, int src1, int coef0, int coef1) {
src0 = (src0 + OutputRoundAdd) >> OutputShift;
src1 = (src1 + OutputRoundAdd) >> OutputShift;
int result = (src0 * coef0 + src1 * coef1) >> DistBits;
result = (result - OutputSub + (1 << (RoundFinal - 1))) >> RoundFinal;
return clamp(result, 0, PixelMax);
}
groupshared int intermediate_buffer[64 * LocalStride];
[numthreads(64, 1, 1)] void main(uint3 thread
: SV_DispatchThreadID) {
if (thread.x >= cb_wi_count) return;
const int w_log = cb_width_log2;
const int h_log = cb_height_log2;
const int subblock = (thread.x >> 2) & ((1 << (w_log + h_log)) - 1);
const int block_index = cb_pass_offset + (thread.x >> (w_log + h_log + 2));
uint4 block = pred_blocks.Load4(block_index * 16);
// block.x - pos xy
// block.y - flags:
// 2 plane
// 3 ref
// 4 filter_x
// 4 filter_y
// 1 skip
// 3 ref1
//
const int plane = block.y & 3;
const int noskip = block.y & NoSkipFlag;
const int wi = thread.x & 3;
const int dx = SubblockW * (subblock & ((1 << w_log) - 1));
const int dy = SubblockH * (subblock >> w_log);
int mbx = SubblockW * (block.x & 0xffff);
int mby = SubblockH * (block.x >> 16);
int ref_frm = (block.y >> 2) & 7;
int refplane = ref_frm * 3 + plane;
int ref_offset = cb_refplanes[refplane].y;
int ref_stride = cb_refplanes[refplane].x;
int ref_w = cb_refplanes[refplane].z;
int ref_h = cb_refplanes[refplane].w;
int4 scale = cb_scale[ref_frm + 1];
int mv = block.z;
int mvx = scale_value((mbx << SUBPEL_BITS) + (mv >> 16), scale.x) + SCALE_EXTRA_OFF;
int mvy = scale_value((mby << SUBPEL_BITS) + ((mv << 16) >> 16), scale.z) + SCALE_EXTRA_OFF;
mvx += (dx + wi) * scale.y;
mvy += dy * scale.w;
int x0 = clamp((mvx >> SCALE_SUBPEL_BITS) - 3, -11, ref_w) << 1;
int y0 = (mvy >> SCALE_SUBPEL_BITS) - 3;
mvx &= SCALE_SUBPEL_MASK;
mvy &= SCALE_SUBPEL_MASK;
int filter_h = (((block.y >> 5) & 15) << 4) + (mvx >> SCALE_EXTRA_BITS);
int lines = 8 + ((3 * scale.w + mvy) >> SCALE_SUBPEL_BITS);
int4 kernel_h0 = cb_kernels[filter_h][0];
int4 kernel_h1 = cb_kernels[filter_h][1];
int local_base = (thread.x & 63) * LocalStride;
int i;
for (i = 0; i < lines; ++i) {
int ref_addr = ref_offset + ref_stride * clamp(y0 + i, 0, ref_h) + x0;
const uint shift = (ref_addr & 2) * 8;
ref_addr &= ~3;
uint4 l = dst_frame.Load4(ref_addr);
uint l5 = dst_frame.Load(ref_addr + 16);
l.x = (l.x >> shift) | ((l.y << (24 - shift)) << 8);
l.y = (l.y >> shift) | ((l.z << (24 - shift)) << 8);
l.z = (l.z >> shift) | ((l.w << (24 - shift)) << 8);
l.w = (l.w >> shift) | ((l5 << (24 - shift)) << 8);
int sum = 0;
sum += kernel_h0.x * (int)((l.x >> 0) & 0xffff);
sum += kernel_h0.y * (int)((l.x >> 16) & 0xffff);
sum += kernel_h0.z * (int)((l.y >> 0) & 0xffff);
sum += kernel_h0.w * (int)((l.y >> 16) & 0xffff);
sum += kernel_h1.x * (int)((l.z >> 0) & 0xffff);
sum += kernel_h1.y * (int)((l.z >> 16) & 0xffff);
sum += kernel_h1.z * (int)((l.w >> 0) & 0xffff);
sum += kernel_h1.w * (int)((l.w >> 16) & 0xffff);
intermediate_buffer[local_base + i] = (sum + FilterLineAdd10bit) >> FilterLineShift;
}
GroupMemoryBarrier();
mvy += wi * scale.w;
int filter_v = (((block.y >> 9) & 15) << 4) + ((mvy & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS);
int4 kernel_v0 = cb_kernels[filter_v][0];
int4 kernel_v1 = cb_kernels[filter_v][1];
local_base = (mvy >> SCALE_SUBPEL_BITS) + (thread.x & 60) * LocalStride;
int output[4]; /// int4???
for (i = 0; i < 4; ++i) {
int sum = 0;
int loc_addr = local_base + i * LocalStride;
sum += kernel_v0.x * intermediate_buffer[loc_addr + 0];
sum += kernel_v0.y * intermediate_buffer[loc_addr + 1];
sum += kernel_v0.z * intermediate_buffer[loc_addr + 2];
sum += kernel_v0.w * intermediate_buffer[loc_addr + 3];
sum += kernel_v1.x * intermediate_buffer[loc_addr + 4];
sum += kernel_v1.y * intermediate_buffer[loc_addr + 5];
sum += kernel_v1.z * intermediate_buffer[loc_addr + 6];
sum += kernel_v1.w * intermediate_buffer[loc_addr + 7];
output[i] = sum;
}
GroupMemoryBarrier();
ref_frm = (block.y >> 14) & 7;
refplane = ref_frm * 3 + plane;
ref_offset = cb_refplanes[refplane].y;
ref_stride = cb_refplanes[refplane].x;
ref_w = cb_refplanes[refplane].z;
ref_h = cb_refplanes[refplane].w;
scale = cb_scale[ref_frm + 1];
mv = block.w;
mvx = scale_value((mbx << SUBPEL_BITS) + (mv >> 16), scale.x) + SCALE_EXTRA_OFF;
mvy = scale_value((mby << SUBPEL_BITS) + ((mv << 16) >> 16), scale.z) + SCALE_EXTRA_OFF;
mvx += (dx + wi) * scale.y;
mvy += dy * scale.w;
x0 = clamp((mvx >> SCALE_SUBPEL_BITS) - 3, -11, ref_w) << 1;
y0 = (mvy >> SCALE_SUBPEL_BITS) - 3;
mvx &= SCALE_SUBPEL_MASK;
mvy &= SCALE_SUBPEL_MASK;
filter_h = (((block.y >> 5) & 15) << 4) + (mvx >> SCALE_EXTRA_BITS);
lines = 8 + ((3 * scale.w + mvy) >> SCALE_SUBPEL_BITS);
kernel_h0 = cb_kernels[filter_h][0];
kernel_h1 = cb_kernels[filter_h][1];
local_base = (thread.x & 63) * LocalStride;
for (i = 0; i < lines; ++i) {
int ref_addr = ref_offset + ref_stride * clamp(y0 + i, 0, ref_h) + x0;
const uint shift = (ref_addr & 2) * 8;
ref_addr &= ~3;
uint4 l = dst_frame.Load4(ref_addr);
uint l5 = dst_frame.Load(ref_addr + 16);
l.x = (l.x >> shift) | ((l.y << (24 - shift)) << 8);
l.y = (l.y >> shift) | ((l.z << (24 - shift)) << 8);
l.z = (l.z >> shift) | ((l.w << (24 - shift)) << 8);
l.w = (l.w >> shift) | ((l5 << (24 - shift)) << 8);
int sum = 0;
sum += kernel_h0.x * (int)((l.x >> 0) & 0xffff);
sum += kernel_h0.y * (int)((l.x >> 16) & 0xffff);
sum += kernel_h0.z * (int)((l.y >> 0) & 0xffff);
sum += kernel_h0.w * (int)((l.y >> 16) & 0xffff);
sum += kernel_h1.x * (int)((l.z >> 0) & 0xffff);
sum += kernel_h1.y * (int)((l.z >> 16) & 0xffff);
sum += kernel_h1.z * (int)((l.w >> 0) & 0xffff);
sum += kernel_h1.w * (int)((l.w >> 16) & 0xffff);
intermediate_buffer[local_base + i] = (sum + FilterLineAdd10bit) >> FilterLineShift;
}
GroupMemoryBarrier();
mvy += wi * scale.w;
filter_v = (((block.y >> 9) & 15) << 4) + ((mvy & SCALE_SUBPEL_MASK) >> SCALE_EXTRA_BITS);
kernel_v0 = cb_kernels[filter_v][0];
kernel_v1 = cb_kernels[filter_v][1];
local_base = (mvy >> SCALE_SUBPEL_BITS) + (thread.x & 60) * LocalStride;
int coef0 = (block.y >> 17) & 15;
int coef1 = (block.y >> 21) & 15;
for (i = 0; i < 4; ++i) {
int sum = 0;
int loc_addr = local_base + i * LocalStride;
sum += kernel_v0.x * intermediate_buffer[loc_addr + 0];
sum += kernel_v0.y * intermediate_buffer[loc_addr + 1];
sum += kernel_v0.z * intermediate_buffer[loc_addr + 2];
sum += kernel_v0.w * intermediate_buffer[loc_addr + 3];
sum += kernel_v1.x * intermediate_buffer[loc_addr + 4];
sum += kernel_v1.y * intermediate_buffer[loc_addr + 5];
sum += kernel_v1.z * intermediate_buffer[loc_addr + 6];
sum += kernel_v1.w * intermediate_buffer[loc_addr + 7];
output[i] = blend(output[i], sum, coef0, coef1);
}
mbx = (mbx + dx) << 1;
mby += dy + wi;
if (noskip) {
const int res_addr = cb_planes[plane].w + mbx + mby * cb_planes[plane].z;
int2 r = (int2)residuals.Load2(res_addr);
output[0] = clamp(output[0] + ((r.x << 16) >> 16), 0, PixelMax);
output[1] = clamp(output[1] + (r.x >> 16), 0, PixelMax);
output[2] = clamp(output[2] + ((r.y << 16) >> 16), 0, PixelMax);
output[3] = clamp(output[3] + (r.y >> 16), 0, PixelMax);
}
const int output_addr = cb_planes[plane].y + mbx + mby * cb_planes[plane].x;
dst_frame.Store2(output_addr, uint2(output[0] | (output[1] << 16), output[2] | (output[3] << 16)));
}