| /* |
| * 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(bool is_global_mv_block, |
| GlobalMotionTransformationType type) { |
| return is_global_mv_block && |
| 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_ |