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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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16
Userland/Libraries/LibVideo/VP9/Decoder.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
*/
@ -8,6 +9,7 @@
#include "Parser.h"
#include <AK/ByteBuffer.h>
#include <AK/Error.h>
namespace Video::VP9 {
@ -16,27 +18,27 @@ class Decoder {
public:
Decoder();
bool decode_frame(ByteBuffer const&);
ErrorOr<void> decode_frame(ByteBuffer const&);
void dump_frame_info();
private:
/* (8.4) Probability Adaptation Process */
u8 merge_prob(u8 pre_prob, u8 count_0, u8 count_1, u8 count_sat, u8 max_update_factor);
u8 merge_probs(int const* tree, int index, u8* probs, u8* counts, u8 count_sat, u8 max_update_factor);
bool adapt_coef_probs();
bool adapt_non_coef_probs();
ErrorOr<void> adapt_coef_probs();
ErrorOr<void> adapt_non_coef_probs();
void adapt_probs(int const* tree, u8* probs, u8* counts);
u8 adapt_prob(u8 prob, u8 counts[2]);
/* (8.5) Prediction Processes */
bool predict_intra(size_t plane, u32 x, u32 y, bool have_left, bool have_above, bool not_on_right, TXSize tx_size, u32 block_index);
bool predict_inter(size_t plane, u32 x, u32 y, u32 w, u32 h, u32 block_index);
ErrorOr<void> predict_intra(size_t plane, u32 x, u32 y, bool have_left, bool have_above, bool not_on_right, TXSize tx_size, u32 block_index);
ErrorOr<void> predict_inter(size_t plane, u32 x, u32 y, u32 w, u32 h, u32 block_index);
/* (8.6) Reconstruction and Dequantization */
bool reconstruct(size_t plane, u32 x, u32 y, TXSize size);
ErrorOr<void> reconstruct(size_t plane, u32 x, u32 y, TXSize size);
/* (8.10) Reference Frame Update Process */
bool update_reference_frames();
ErrorOr<void> update_reference_frames();
NonnullOwnPtr<Parser> m_parser;
};