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// Copyright 2019 The libgav1 Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "src/dsp/weight_mask.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <cstdint>
#include <string>
#include <type_traits>
#include "src/dsp/dsp.h"
#include "src/utils/common.h"
namespace libgav1 {
namespace dsp {
namespace {
template <int width, int height, int bitdepth, bool mask_is_inverse>
void WeightMask_C(const void* prediction_0, const void* prediction_1,
uint8_t* mask, ptrdiff_t mask_stride) {
using PredType =
typename std::conditional<bitdepth == 8, int16_t, uint16_t>::type;
const auto* pred_0 = static_cast<const PredType*>(prediction_0);
const auto* pred_1 = static_cast<const PredType*>(prediction_1);
static_assert(width >= 8, "");
static_assert(height >= 8, "");
constexpr int rounding_bits = bitdepth - 8 + ((bitdepth == 12) ? 2 : 4);
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
const int difference = RightShiftWithRounding(
std::abs(pred_0[x] - pred_1[x]), rounding_bits);
const auto mask_value =
static_cast<uint8_t>(std::min(DivideBy16(difference) + 38, 64));
mask[x] = mask_is_inverse ? 64 - mask_value : mask_value;
}
pred_0 += width;
pred_1 += width;
mask += mask_stride;
}
}
#define INIT_WEIGHT_MASK(width, height, bitdepth, w_index, h_index) \
dsp->weight_mask[w_index][h_index][0] = \
WeightMask_C<width, height, bitdepth, 0>; \
dsp->weight_mask[w_index][h_index][1] = \
WeightMask_C<width, height, bitdepth, 1>
void Init8bpp() {
Dsp* const dsp = dsp_internal::GetWritableDspTable(8);
assert(dsp != nullptr);
#if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS
INIT_WEIGHT_MASK(8, 8, 8, 0, 0);
INIT_WEIGHT_MASK(8, 16, 8, 0, 1);
INIT_WEIGHT_MASK(8, 32, 8, 0, 2);
INIT_WEIGHT_MASK(16, 8, 8, 1, 0);
INIT_WEIGHT_MASK(16, 16, 8, 1, 1);
INIT_WEIGHT_MASK(16, 32, 8, 1, 2);
INIT_WEIGHT_MASK(16, 64, 8, 1, 3);
INIT_WEIGHT_MASK(32, 8, 8, 2, 0);
INIT_WEIGHT_MASK(32, 16, 8, 2, 1);
INIT_WEIGHT_MASK(32, 32, 8, 2, 2);
INIT_WEIGHT_MASK(32, 64, 8, 2, 3);
INIT_WEIGHT_MASK(64, 16, 8, 3, 1);
INIT_WEIGHT_MASK(64, 32, 8, 3, 2);
INIT_WEIGHT_MASK(64, 64, 8, 3, 3);
INIT_WEIGHT_MASK(64, 128, 8, 3, 4);
INIT_WEIGHT_MASK(128, 64, 8, 4, 3);
INIT_WEIGHT_MASK(128, 128, 8, 4, 4);
#else // !LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS
static_cast<void>(dsp);
#ifndef LIBGAV1_Dsp8bpp_WeightMask_8x8
INIT_WEIGHT_MASK(8, 8, 8, 0, 0);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_8x16
INIT_WEIGHT_MASK(8, 16, 8, 0, 1);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_8x32
INIT_WEIGHT_MASK(8, 32, 8, 0, 2);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_16x8
INIT_WEIGHT_MASK(16, 8, 8, 1, 0);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_16x16
INIT_WEIGHT_MASK(16, 16, 8, 1, 1);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_16x32
INIT_WEIGHT_MASK(16, 32, 8, 1, 2);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_16x64
INIT_WEIGHT_MASK(16, 64, 8, 1, 3);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_32x8
INIT_WEIGHT_MASK(32, 8, 8, 2, 0);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_32x16
INIT_WEIGHT_MASK(32, 16, 8, 2, 1);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_32x32
INIT_WEIGHT_MASK(32, 32, 8, 2, 2);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_32x64
INIT_WEIGHT_MASK(32, 64, 8, 2, 3);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_64x16
INIT_WEIGHT_MASK(64, 16, 8, 3, 1);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_64x32
INIT_WEIGHT_MASK(64, 32, 8, 3, 2);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_64x64
INIT_WEIGHT_MASK(64, 64, 8, 3, 3);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_64x128
INIT_WEIGHT_MASK(64, 128, 8, 3, 4);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_128x64
INIT_WEIGHT_MASK(128, 64, 8, 4, 3);
#endif
#ifndef LIBGAV1_Dsp8bpp_WeightMask_128x128
INIT_WEIGHT_MASK(128, 128, 8, 4, 4);
#endif
#endif // LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS
}
#if LIBGAV1_MAX_BITDEPTH >= 10
void Init10bpp() {
Dsp* const dsp = dsp_internal::GetWritableDspTable(10);
assert(dsp != nullptr);
#if LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS
INIT_WEIGHT_MASK(8, 8, 10, 0, 0);
INIT_WEIGHT_MASK(8, 16, 10, 0, 1);
INIT_WEIGHT_MASK(8, 32, 10, 0, 2);
INIT_WEIGHT_MASK(16, 8, 10, 1, 0);
INIT_WEIGHT_MASK(16, 16, 10, 1, 1);
INIT_WEIGHT_MASK(16, 32, 10, 1, 2);
INIT_WEIGHT_MASK(16, 64, 10, 1, 3);
INIT_WEIGHT_MASK(32, 8, 10, 2, 0);
INIT_WEIGHT_MASK(32, 16, 10, 2, 1);
INIT_WEIGHT_MASK(32, 32, 10, 2, 2);
INIT_WEIGHT_MASK(32, 64, 10, 2, 3);
INIT_WEIGHT_MASK(64, 16, 10, 3, 1);
INIT_WEIGHT_MASK(64, 32, 10, 3, 2);
INIT_WEIGHT_MASK(64, 64, 10, 3, 3);
INIT_WEIGHT_MASK(64, 128, 10, 3, 4);
INIT_WEIGHT_MASK(128, 64, 10, 4, 3);
INIT_WEIGHT_MASK(128, 128, 10, 4, 4);
#else // !LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS
static_cast<void>(dsp);
#ifndef LIBGAV1_Dsp10bpp_WeightMask_8x8
INIT_WEIGHT_MASK(8, 8, 10, 0, 0);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_8x16
INIT_WEIGHT_MASK(8, 16, 10, 0, 1);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_8x32
INIT_WEIGHT_MASK(8, 32, 10, 0, 2);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_16x8
INIT_WEIGHT_MASK(16, 8, 10, 1, 0);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_16x16
INIT_WEIGHT_MASK(16, 16, 10, 1, 1);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_16x32
INIT_WEIGHT_MASK(16, 32, 10, 1, 2);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_16x64
INIT_WEIGHT_MASK(16, 64, 10, 1, 3);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_32x8
INIT_WEIGHT_MASK(32, 8, 10, 2, 0);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_32x16
INIT_WEIGHT_MASK(32, 16, 10, 2, 1);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_32x32
INIT_WEIGHT_MASK(32, 32, 10, 2, 2);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_32x64
INIT_WEIGHT_MASK(32, 64, 10, 2, 3);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_64x16
INIT_WEIGHT_MASK(64, 16, 10, 3, 1);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_64x32
INIT_WEIGHT_MASK(64, 32, 10, 3, 2);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_64x64
INIT_WEIGHT_MASK(64, 64, 10, 3, 3);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_64x128
INIT_WEIGHT_MASK(64, 128, 10, 3, 4);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_128x64
INIT_WEIGHT_MASK(128, 64, 10, 4, 3);
#endif
#ifndef LIBGAV1_Dsp10bpp_WeightMask_128x128
INIT_WEIGHT_MASK(128, 128, 10, 4, 4);
#endif
#endif // LIBGAV1_ENABLE_ALL_DSP_FUNCTIONS
}
#endif
} // namespace
void WeightMaskInit_C() {
Init8bpp();
#if LIBGAV1_MAX_BITDEPTH >= 10
Init10bpp();
#endif
}
} // namespace dsp
} // namespace libgav1
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