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LibVideo/VP9: Select and read motion vectors without fields in Parser

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Candidate vector selections are only used to calculate the new vectors
for the current block, so we only need to keep those for the duration
of the inter_block_mode_info() call.

Candidate vectors are now stored in BlockMotionVectorCandidates, which
contains the fields necessary to choose the vector to use to sample
from the selected reference frame.

Most functions related to motion vectors were renamed to more verbose
but meaningful names.
This commit is contained in:
Zaggy1024 2022-11-23 20:00:58 -06:00 • committed by Andreas Kling
parent 368687a74f
commit ea7a6f343b
3 changed files with 124 additions and 113 deletions
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29
Userland/Libraries/LibVideo/VP9/Parser.h
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@ -114,27 +114,21 @@ private:
DecoderErrorOr<void> intra_block_mode_info(BlockContext&);
DecoderErrorOr<void> inter_block_mode_info(BlockContext&, FrameBlockContext above_context, FrameBlockContext left_context);
DecoderErrorOr<void> read_ref_frames(BlockContext&, FrameBlockContext above_context, FrameBlockContext left_context);
DecoderErrorOr<MotionVectorPair> assign_mv(BlockContext const&);
DecoderErrorOr<MotionVector> read_mv(BlockContext const&, u8 ref);
DecoderErrorOr<i32> read_mv_component(u8 component);
DecoderErrorOr<MotionVectorPair> get_motion_vector(BlockContext const&, BlockMotionVectorCandidates const&);
DecoderErrorOr<MotionVector> read_motion_vector(BlockContext const&, BlockMotionVectorCandidates const&, u8 reference_index);
DecoderErrorOr<i32> read_single_motion_vector_component(u8 component);
DecoderErrorOr<bool> residual(BlockContext&, bool has_block_above, bool has_block_left);
DecoderErrorOr<bool> tokens(BlockContext&, size_t plane, u32 x, u32 y, TXSize tx_size, u32 block_index);
u32 const* get_scan(BlockContext const&, size_t plane, TXSize tx_size, u32 block_index);
DecoderErrorOr<i32> read_coef(u8 bit_depth, Token token);
/* (6.5) Motion Vector Prediction */
void find_mv_refs(BlockContext&, ReferenceFrameType, i32 block);
void find_best_ref_mvs(BlockContext&, u8 ref_list);
bool use_mv_hp(MotionVector const& delta_mv);
void append_sub8x8_mvs(BlockContext&, i32 block, u8 ref_list);
void clamp_mv_ref(BlockContext const&, u8 i);
MotionVector clamp_mv(BlockContext const&, MotionVector vector, i32 border);
MotionVectorPair find_reference_motion_vectors(BlockContext const&, ReferenceFrameType, i32 block);
void select_best_sub_block_reference_motion_vectors(BlockContext const&, BlockMotionVectorCandidates&, i32 block, u8 ref_list);
size_t get_image_index(FrameContext const&, u32 row, u32 column) const;
void get_block_mv(BlockContext const&, MotionVector candidate_vector, u8 ref_list, bool use_prev);
void if_same_ref_frame_add_mv(BlockContext const&, MotionVector candidate_vector, ReferenceFrameType ref_frame, bool use_prev);
void if_diff_ref_frame_add_mv(BlockContext const&, MotionVector candidate_vector, ReferenceFrameType ref_frame, bool use_prev);
void scale_mv(FrameContext const&, u8 ref_list, ReferenceFrameType ref_frame);
void add_mv_ref_list(u8 ref_list);
MotionVectorCandidate get_motion_vector_from_current_or_previous_frame(BlockContext const&, MotionVector candidate_vector, u8 ref_list, bool use_prev);
void add_motion_vector_if_reference_frame_type_is_same(BlockContext const&, MotionVector candidate_vector, ReferenceFrameType ref_frame, Vector<MotionVector, 2>& list, bool use_prev);
void add_motion_vector_if_reference_frame_type_is_different(BlockContext const&, MotionVector candidate_vector, ReferenceFrameType ref_frame, Vector<MotionVector, 2>& list, bool use_prev);
Gfx::Point<size_t> get_decoded_point_for_plane(FrameContext const&, u32 row, u32 column, u8 plane);
Gfx::Size<size_t> get_decoded_size_for_plane(FrameContext const&, u8 plane);
@ -163,9 +157,6 @@ private:
Vector<u8> m_above_partition_context;
Vector<u8> m_left_partition_context;
MotionVectorPair m_near_mv;
MotionVectorPair m_nearest_mv;
MotionVectorPair m_best_mv;
// FIXME: Move these to a struct to store together in one array.
Gfx::Size<u32> m_ref_frame_size[NUM_REF_FRAMES];
bool m_ref_subsampling_x[NUM_REF_FRAMES];
@ -183,10 +174,6 @@ private:
ReferenceFrameType m_comp_fixed_ref;
ReferenceFramePair m_comp_var_ref;
MotionVectorPair m_candidate_mv;
ReferenceFramePair m_candidate_frame;
u8 m_ref_mv_count { 0 };
MotionVectorPair m_ref_list_mv;
bool m_use_prev_frame_mvs;
Vector2D<PersistentBlockContext> m_previous_block_contexts;
// Indexed by ReferenceFrame enum.