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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_MOTION_VECTOR_H_
#define LIBGAV1_SRC_MOTION_VECTOR_H_
#include <algorithm>
#include <array>
#include <cstdint>
#include "src/buffer_pool.h"
#include "src/obu_parser.h"
#include "src/tile.h"
#include "src/utils/array_2d.h"
#include "src/utils/constants.h"
#include "src/utils/types.h"
namespace libgav1 {
constexpr bool IsGlobalMvBlock(const BlockParameters& bp,
GlobalMotionTransformationType type) {
return (bp.y_mode == kPredictionModeGlobalMv ||
bp.y_mode == kPredictionModeGlobalGlobalMv) &&
!IsBlockDimension4(bp.size) &&
type > kGlobalMotionTransformationTypeTranslation;
}
// The |contexts| output parameter may be null. If the caller does not need
// the |contexts| output, pass nullptr as the argument.
void FindMvStack(const Tile::Block& block, bool is_compound,
MvContexts* contexts); // 7.10.2
void FindWarpSamples(const Tile::Block& block, int* num_warp_samples,
int* num_samples_scanned,
int candidates[kMaxLeastSquaresSamples][4]); // 7.10.4.
// Section 7.9.1 in the spec. But this is done per tile instead of for the whole
// frame.
void SetupMotionField(
const ObuFrameHeader& frame_header, const RefCountedBuffer& current_frame,
const std::array<RefCountedBufferPtr, kNumReferenceFrameTypes>&
reference_frames,
int row4x4_start, int row4x4_end, int column4x4_start, int column4x4_end,
TemporalMotionField* motion_field);
} // namespace libgav1
#endif // LIBGAV1_SRC_MOTION_VECTOR_H_
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