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LibVideo: Allow bit stream reads to throw errors

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Errors are propagated to the user of the decoder so that they can be
aware of specific places where a read failed.
This commit is contained in:
Zaggy1024 2022-10-08 19:13:02 -05:00 • committed by Andrew Kaster
parent af0584ea53
commit b37ea6b414
10 changed files with 529 additions and 509 deletions
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129
Userland/Libraries/LibVideo/VP9/Parser.h
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@ -1,5 +1,6 @@
/*
* Copyright (c) 2021, Hunter Salyer <thefalsehonesty@gmail.com>
* Copyright (c) 2022, Gregory Bertilson <zaggy1024@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -26,20 +27,20 @@ class Parser {
public:
explicit Parser(Decoder&);
~Parser();
bool parse_frame(ByteBuffer const&);
ErrorOr<void> parse_frame(ByteBuffer const&);
void dump_info();
private:
FrameType read_frame_type()
ErrorOr<FrameType> read_frame_type()
{
if (m_bit_stream->read_bit())
if (TRY(m_bit_stream->read_bit()))
return NonKeyFrame;
return KeyFrame;
}
ColorRange read_color_range()
ErrorOr<ColorRange> read_color_range()
{
if (m_bit_stream->read_bit())
if (TRY(m_bit_stream->read_bit()))
return FullSwing;
return StudioSwing;
}
@ -52,83 +53,83 @@ private:
/* (6.1) Frame Syntax */
bool trailing_bits();
bool refresh_probs();
ErrorOr<void> refresh_probs();
/* (6.2) Uncompressed Header Syntax */
bool uncompressed_header();
bool frame_sync_code();
bool color_config();
bool frame_size();
bool render_size();
bool frame_size_with_refs();
bool compute_image_size();
bool read_interpolation_filter();
bool loop_filter_params();
bool quantization_params();
i8 read_delta_q();
bool segmentation_params();
u8 read_prob();
bool tile_info();
ErrorOr<void> uncompressed_header();
ErrorOr<void> frame_sync_code();
ErrorOr<void> color_config();
ErrorOr<void> frame_size();
ErrorOr<void> render_size();
ErrorOr<void> frame_size_with_refs();
void compute_image_size();
ErrorOr<void> read_interpolation_filter();
ErrorOr<void> loop_filter_params();
ErrorOr<void> quantization_params();
ErrorOr<i8> read_delta_q();
ErrorOr<void> segmentation_params();
ErrorOr<u8> read_prob();
ErrorOr<void> tile_info();
u16 calc_min_log2_tile_cols();
u16 calc_max_log2_tile_cols();
bool setup_past_independence();
void setup_past_independence();
/* (6.3) Compressed Header Syntax */
bool compressed_header();
bool read_tx_mode();
bool tx_mode_probs();
u8 diff_update_prob(u8 prob);
u8 decode_term_subexp();
ErrorOr<void> compressed_header();
ErrorOr<void> read_tx_mode();
ErrorOr<void> tx_mode_probs();
ErrorOr<u8> diff_update_prob(u8 prob);
ErrorOr<u8> decode_term_subexp();
u8 inv_remap_prob(u8 delta_prob, u8 prob);
u8 inv_recenter_nonneg(u8 v, u8 m);
bool read_coef_probs();
bool read_skip_prob();
bool read_inter_mode_probs();
bool read_interp_filter_probs();
bool read_is_inter_probs();
bool frame_reference_mode();
bool frame_reference_mode_probs();
bool read_y_mode_probs();
bool read_partition_probs();
bool mv_probs();
u8 update_mv_prob(u8 prob);
bool setup_compound_reference_mode();
ErrorOr<void> read_coef_probs();
ErrorOr<void> read_skip_prob();
ErrorOr<void> read_inter_mode_probs();
ErrorOr<void> read_interp_filter_probs();
ErrorOr<void> read_is_inter_probs();
ErrorOr<void> frame_reference_mode();
ErrorOr<void> frame_reference_mode_probs();
ErrorOr<void> read_y_mode_probs();
ErrorOr<void> read_partition_probs();
ErrorOr<void> mv_probs();
ErrorOr<u8> update_mv_prob(u8 prob);
void setup_compound_reference_mode();
/* (6.4) Decode Tiles Syntax */
bool decode_tiles();
bool clear_above_context();
ErrorOr<void> decode_tiles();
void clear_above_context();
u32 get_tile_offset(u32 tile_num, u32 mis, u32 tile_size_log2);
bool decode_tile();
bool clear_left_context();
bool decode_partition(u32 row, u32 col, u8 block_subsize);
bool decode_block(u32 row, u32 col, u8 subsize);
bool mode_info();
bool intra_frame_mode_info();
bool intra_segment_id();
bool read_skip();
ErrorOr<void> decode_tile();
void clear_left_context();
ErrorOr<void> decode_partition(u32 row, u32 col, u8 block_subsize);
ErrorOr<void> decode_block(u32 row, u32 col, u8 subsize);
ErrorOr<void> mode_info();
ErrorOr<void> intra_frame_mode_info();
ErrorOr<void> intra_segment_id();
ErrorOr<void> read_skip();
bool seg_feature_active(u8 feature);
bool read_tx_size(bool allow_select);
bool inter_frame_mode_info();
bool inter_segment_id();
ErrorOr<void> read_tx_size(bool allow_select);
ErrorOr<void> inter_frame_mode_info();
ErrorOr<void> inter_segment_id();
u8 get_segment_id();
bool read_is_inter();
bool intra_block_mode_info();
bool inter_block_mode_info();
bool read_ref_frames();
bool assign_mv(bool is_compound);
bool read_mv(u8 ref);
i32 read_mv_component(u8 component);
bool residual();
ErrorOr<void> read_is_inter();
ErrorOr<void> intra_block_mode_info();
ErrorOr<void> inter_block_mode_info();
ErrorOr<void> read_ref_frames();
ErrorOr<void> assign_mv(bool is_compound);
ErrorOr<void> read_mv(u8 ref);
ErrorOr<i32> read_mv_component(u8 component);
ErrorOr<void> residual();
TXSize get_uv_tx_size();
BlockSubsize get_plane_block_size(u32 subsize, u8 plane);
bool tokens(size_t plane, u32 x, u32 y, TXSize tx_size, u32 block_index);
ErrorOr<bool> tokens(size_t plane, u32 x, u32 y, TXSize tx_size, u32 block_index);
u32 const* get_scan(size_t plane, TXSize tx_size, u32 block_index);
u32 read_coef(Token token);
ErrorOr<i32> read_coef(Token token);
/* (6.5) Motion Vector Prediction */
bool find_mv_refs(ReferenceFrame, int block);
bool find_best_ref_mvs(int ref_list);
bool append_sub8x8_mvs(u8 block, u8 ref_list);
ErrorOr<void> find_mv_refs(ReferenceFrame, int block);
ErrorOr<void> find_best_ref_mvs(int ref_list);
ErrorOr<void> append_sub8x8_mvs(u8 block, u8 ref_list);
bool use_mv_hp(MV const& delta_mv);
u8 m_profile { 0 };