mirror of
https://github.com/RGBCube/serenity
synced 2025-05-18 01:55:07 +00:00
baff94e44d
This patch brings all of the previous work together and starts to actually parse and decode frame information. Currently it only parses the uncompressed header data (section 6.2 of the spec).
108 lines
2.9 KiB
C++
108 lines
2.9 KiB
C++
/*
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* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@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 "BitStream.h"
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#include "LookupTables.h"
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#include "ProbabilityTables.h"
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#include "SyntaxElementCounter.h"
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#include <AK/ByteBuffer.h>
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#include <AK/OwnPtr.h>
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namespace Video::VP9 {
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class Decoder {
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public:
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Decoder();
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bool parse_frame(const ByteBuffer&);
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void dump_info();
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private:
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FrameType read_frame_type()
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{
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if (m_bit_stream->read_bit())
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return NonKeyFrame;
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return KeyFrame;
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}
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ColorRange read_color_range()
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{
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if (m_bit_stream->read_bit())
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return FullSwing;
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return StudioSwing;
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}
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bool uncompressed_header();
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bool frame_sync_code();
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bool color_config();
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bool frame_size();
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bool render_size();
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bool frame_size_with_refs();
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bool compute_image_size();
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bool read_interpolation_filter();
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bool loop_filter_params();
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bool quantization_params();
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i8 read_delta_q();
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bool segmentation_params();
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u8 read_prob();
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bool tile_info();
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u16 calc_min_log2_tile_cols();
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u16 calc_max_log2_tile_cols();
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bool setup_past_independence();
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bool trailing_bits();
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u64 m_start_bit_pos { 0 };
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u8 m_profile { 0 };
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u8 m_frame_to_show_map_index { 0 };
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u16 m_header_size_in_bytes { 0 };
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u8 m_refresh_frame_flags { 0 };
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u8 m_loop_filter_level { 0 };
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u8 m_loop_filter_sharpness { 0 };
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bool m_loop_filter_delta_enabled { false };
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FrameType m_frame_type;
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FrameType m_last_frame_type;
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bool m_show_frame { false };
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bool m_error_resilient_mode { false };
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bool m_frame_is_intra { false };
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u8 m_reset_frame_context { 0 };
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bool m_allow_high_precision_mv { false };
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u8 m_ref_frame_idx[3];
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u8 m_ref_frame_sign_bias[LastFrame + 3];
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bool m_refresh_frame_context { false };
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bool m_frame_parallel_decoding_mode { false };
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u8 m_frame_context_idx { 0 };
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u8 m_bit_depth { 0 };
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ColorSpace m_color_space;
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ColorRange m_color_range;
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bool m_subsampling_x { false };
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bool m_subsampling_y { false };
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u16 m_frame_width { 0 };
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u16 m_frame_height { 0 };
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u16 m_render_width { 0 };
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u16 m_render_height { 0 };
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u16 m_mi_cols { 0 };
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u16 m_mi_rows { 0 };
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u16 m_sb64_cols { 0 };
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u16 m_sb64_rows { 0 };
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InterpolationFilter m_interpolation_filter;
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bool m_lossless { false };
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u8 m_segmentation_tree_probs[7];
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u8 m_segmentation_pred_prob[3];
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bool m_feature_enabled[8][4];
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u8 m_feature_data[8][4];
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bool m_segmentation_abs_or_delta_update { false };
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u16 m_tile_cols_log2 { 0 };
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u16 m_tile_rows_log2 { 0 };
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i8 m_loop_filter_ref_deltas[MAX_REF_FRAMES];
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i8 m_loop_filter_mode_deltas[2];
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OwnPtr<BitStream> m_bit_stream;
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OwnPtr<ProbabilityTables> m_probability_tables;
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OwnPtr<SyntaxElementCounter> m_syntax_element_counter;
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};
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}
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