mirror of
https://github.com/RGBCube/serenity
synced 2025-05-21 01:05:08 +00:00
24ae35086d
Errors are now deferred until `finish_decode()` is finished, meaning branches to return errors only need to occur at the end of a ranged decode. If VPX_DEBUG is enabled, a debug message will be printed immediately when an overread occurs. Average decoding times for `Tests/LibGfx/test-inputs/4.webp` improve by about 4.7% with this change, absolute decode times changing from 27.4ms±1.1ms down to 26.1ms±1.0ms.
79 lines
5.4 KiB
C++
79 lines
5.4 KiB
C++
/*
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* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
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* Copyright (c) 2022, Gregory Bertilson <zaggy1024@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include "BooleanDecoder.h"
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#include "ContextStorage.h"
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#include "Enums.h"
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#include "ProbabilityTables.h"
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#include "SyntaxElementCounter.h"
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namespace Video::VP9 {
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class Parser;
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struct BlockContext;
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struct FrameBlockContext;
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struct TokensContext {
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TransformSize m_tx_size;
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bool m_is_uv_plane;
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bool m_is_inter;
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u8 m_band;
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u8 m_context_index;
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};
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class TreeParser {
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public:
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static Partition parse_partition(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, bool has_rows, bool has_columns, BlockSubsize block_subsize, u8 num_8x8, PartitionContextView above_partition_context, PartitionContextView left_partition_context, u32 row, u32 column, bool frame_is_intra);
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static PredictionMode parse_default_intra_mode(BooleanDecoder&, ProbabilityTables const&, BlockSubsize mi_size, FrameBlockContext above, FrameBlockContext left, Array<PredictionMode, 4> const& block_sub_modes, u8 index_x, u8 index_y);
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static PredictionMode parse_default_uv_mode(BooleanDecoder&, ProbabilityTables const&, PredictionMode y_mode);
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static PredictionMode parse_intra_mode(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, BlockSubsize mi_size);
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static PredictionMode parse_sub_intra_mode(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&);
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static PredictionMode parse_uv_mode(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, PredictionMode y_mode);
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static u8 parse_segment_id(BooleanDecoder&, Array<u8, 7> const& probabilities);
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static bool parse_segment_id_predicted(BooleanDecoder&, Array<u8, 3> const& probabilities, u8 above_seg_pred_context, u8 left_seg_pred_context);
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static PredictionMode parse_inter_mode(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 mode_context_for_ref_frame_0);
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static InterpolationFilter parse_interpolation_filter(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, FrameBlockContext above, FrameBlockContext left);
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static bool parse_skip(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, FrameBlockContext above, FrameBlockContext left);
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static TransformSize parse_tx_size(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, TransformSize max_tx_size, FrameBlockContext above, FrameBlockContext left);
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static bool parse_block_is_inter_predicted(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, FrameBlockContext above, FrameBlockContext left);
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static ReferenceMode parse_comp_mode(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, ReferenceFrameType comp_fixed_ref, FrameBlockContext above, FrameBlockContext left);
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static ReferenceIndex parse_comp_ref(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, ReferenceFrameType comp_fixed_ref, ReferenceFramePair comp_var_ref, ReferenceIndex variable_reference_index, FrameBlockContext above, FrameBlockContext left);
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static bool parse_single_ref_part_1(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, FrameBlockContext above, FrameBlockContext left);
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static bool parse_single_ref_part_2(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, FrameBlockContext above, FrameBlockContext left);
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static MvJoint parse_motion_vector_joint(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&);
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static bool parse_motion_vector_sign(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component);
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static MvClass parse_motion_vector_class(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component);
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static bool parse_motion_vector_class0_bit(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component);
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static u8 parse_motion_vector_class0_fr(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component, bool class_0_bit);
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static bool parse_motion_vector_class0_hp(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component, bool use_hp);
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static bool parse_motion_vector_bit(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component, u8 bit_index);
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static u8 parse_motion_vector_fr(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component);
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static bool parse_motion_vector_hp(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, u8 component, bool use_hp);
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static TokensContext get_context_for_first_token(NonZeroTokensView above_non_zero_tokens, NonZeroTokensView left_non_zero_tokens, TransformSize transform_size, u8 plane, u32 sub_block_column, u32 sub_block_row, bool is_inter, u8 band);
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static TokensContext get_context_for_other_tokens(Array<u8, 1024> token_cache, TransformSize transform_size, TransformSet transform_set, u8 plane, u16 token_position, bool is_inter, u8 band);
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static bool parse_more_coefficients(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, TokensContext const& context);
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static Token parse_token(BooleanDecoder&, ProbabilityTables const&, SyntaxElementCounter&, TokensContext const& context);
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};
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struct PartitionTreeContext {
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bool has_rows;
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bool has_columns;
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BlockSubsize block_subsize;
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u8 num_8x8;
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Vector<u8> const& above_partition_context;
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Vector<u8> const& left_partition_context;
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u32 row;
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u32 column;
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bool frame_is_intra;
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};
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}
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