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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.
*/
#ifndef LIBGAV1_SRC_DSP_COMMON_H_
#define LIBGAV1_SRC_DSP_COMMON_H_
#include <cstdint>
#include "src/dsp/constants.h"
#include "src/utils/constants.h"
#include "src/utils/memory.h"
namespace libgav1 {
enum { kSgrStride = kRestorationUnitWidth + 32 }; // anonymous enum
// Self guided projection filter.
struct SgrProjInfo {
int index;
int multiplier[2];
};
struct WienerInfo {
static const int kVertical = 0;
static const int kHorizontal = 1;
int16_t number_leading_zero_coefficients[2];
alignas(kMaxAlignment) int16_t filter[2][(kWienerFilterTaps + 1) / 2];
};
struct RestorationUnitInfo : public MaxAlignedAllocable {
LoopRestorationType type;
SgrProjInfo sgr_proj_info;
WienerInfo wiener_info;
};
struct SgrBuffer {
alignas(kMaxAlignment) uint16_t sum3[4 * kSgrStride];
alignas(kMaxAlignment) uint16_t sum5[5 * kSgrStride];
alignas(kMaxAlignment) uint32_t square_sum3[4 * kSgrStride];
alignas(kMaxAlignment) uint32_t square_sum5[5 * kSgrStride];
alignas(kMaxAlignment) uint16_t ma343[4 * kRestorationUnitWidth];
alignas(kMaxAlignment) uint16_t ma444[3 * kRestorationUnitWidth];
alignas(kMaxAlignment) uint16_t ma565[2 * kRestorationUnitWidth];
alignas(kMaxAlignment) uint32_t b343[4 * kRestorationUnitWidth];
alignas(kMaxAlignment) uint32_t b444[3 * kRestorationUnitWidth];
alignas(kMaxAlignment) uint32_t b565[2 * kRestorationUnitWidth];
// The following 2 buffers are only used by the C functions. Since SgrBuffer
// is smaller than |wiener_buffer| in RestorationBuffer which is an union,
// it's OK to always keep the following 2 buffers.
alignas(kMaxAlignment) uint8_t ma[kSgrStride]; // [0, 255]
// b is less than 2^16 for 8-bit. However, making it a template slows down the
// C function by 5%. So b is fixed to 32-bit.
alignas(kMaxAlignment) uint32_t b[kSgrStride];
};
union RestorationBuffer {
// For self-guided filter.
SgrBuffer sgr_buffer;
// For wiener filter.
// The array |intermediate| in Section 7.17.4, the intermediate results
// between the horizontal and vertical filters.
alignas(kMaxAlignment) int16_t
wiener_buffer[(kRestorationUnitHeight + kWienerFilterTaps - 1) *
kRestorationUnitWidth];
};
} // namespace libgav1
#endif // LIBGAV1_SRC_DSP_COMMON_H_
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