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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_LOOP_RESTORATION_H_
#define LIBGAV1_SRC_DSP_LOOP_RESTORATION_H_
// Pull in LIBGAV1_DspXXX defines representing the implementation status
// of each function. The resulting value of each can be used by each module to
// determine whether an implementation is needed at compile time.
// IWYU pragma: begin_exports
// ARM:
#include "src/dsp/arm/loop_restoration_neon.h"
// x86:
// Note includes should be sorted in logical order avx2/avx/sse4, etc.
// The order of includes is important as each tests for a superior version
// before setting the base.
// clang-format off
#include "src/dsp/x86/loop_restoration_avx2.h"
#include "src/dsp/x86/loop_restoration_sse4.h"
// clang-format on
// IWYU pragma: end_exports
namespace libgav1 {
namespace dsp {
enum {
// Precision of a division table (mtable)
kSgrProjScaleBits = 20,
kSgrProjReciprocalBits = 12,
// Core self-guided restoration precision bits.
kSgrProjSgrBits = 8,
// Precision bits of generated values higher than source before projection.
kSgrProjRestoreBits = 4
}; // anonymous enum
extern const uint8_t kSgrMaLookup[256];
// Initializes Dsp::loop_restorations. This function is not thread-safe.
void LoopRestorationInit_C();
template <typename T>
void Circulate3PointersBy1(T* p[3]) {
T* const p0 = p[0];
p[0] = p[1];
p[1] = p[2];
p[2] = p0;
}
template <typename T>
void Circulate4PointersBy2(T* p[4]) {
std::swap(p[0], p[2]);
std::swap(p[1], p[3]);
}
template <typename T>
void Circulate5PointersBy2(T* p[5]) {
T* const p0 = p[0];
T* const p1 = p[1];
p[0] = p[2];
p[1] = p[3];
p[2] = p[4];
p[3] = p0;
p[4] = p1;
}
} // namespace dsp
} // namespace libgav1
#endif // LIBGAV1_SRC_DSP_LOOP_RESTORATION_H_
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