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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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34
Userland/Libraries/LibVideo/VP9/Decoder.cpp
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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
*/
@ -14,15 +15,16 @@ Decoder::Decoder()
{
}
bool Decoder::decode_frame(ByteBuffer const& frame_data)
ErrorOr<void> Decoder::decode_frame(ByteBuffer const& frame_data)
{
SAFE_CALL(m_parser->parse_frame(frame_data));
TRY(m_parser->parse_frame(frame_data));
// TODO:
// - #2
// - #3
// - #4
SAFE_CALL(update_reference_frames());
return true;
TRY(update_reference_frames());
return {};
}
void Decoder::dump_frame_info()
@ -49,7 +51,7 @@ u8 Decoder::merge_probs(int const* tree, int index, u8* probs, u8* counts, u8 co
return left_count + right_count;
}
bool Decoder::adapt_coef_probs()
ErrorOr<void> Decoder::adapt_coef_probs()
{
u8 update_factor;
if (m_parser->m_frame_is_intra || m_parser->m_last_frame_type != KeyFrame)
@ -76,7 +78,7 @@ bool Decoder::adapt_coef_probs()
}
}
return true;
return {};
}
#define ADAPT_PROB_TABLE(name, size) \
@ -94,7 +96,7 @@ bool Decoder::adapt_coef_probs()
} \
} while (0)
bool Decoder::adapt_non_coef_probs()
ErrorOr<void> Decoder::adapt_non_coef_probs()
{
auto& probs = *m_parser->m_probability_tables;
auto& counter = *m_parser->m_syntax_element_counter;
@ -137,7 +139,7 @@ bool Decoder::adapt_non_coef_probs()
probs.mv_hp_prob()[i] = adapt_prob(probs.mv_hp_prob()[i], counter.m_counts_mv_hp[i]);
}
}
return true;
return {};
}
void Decoder::adapt_probs(int const* tree, u8* probs, u8* counts)
@ -150,25 +152,25 @@ u8 Decoder::adapt_prob(u8 prob, u8 counts[2])
return merge_prob(prob, counts[0], counts[1], COUNT_SAT, MAX_UPDATE_FACTOR);
}
bool Decoder::predict_intra(size_t, u32, u32, bool, bool, bool, TXSize, u32)
ErrorOr<void> Decoder::predict_intra(size_t, u32, u32, bool, bool, bool, TXSize, u32)
{
// TODO: Implement
return true;
return Error::from_string_literal("predict_intra not implemented");
}
bool Decoder::predict_inter(size_t, u32, u32, u32, u32, u32)
ErrorOr<void> Decoder::predict_inter(size_t, u32, u32, u32, u32, u32)
{
// TODO: Implement
return true;
return Error::from_string_literal("predict_inter not implemented");
}
bool Decoder::reconstruct(size_t, u32, u32, TXSize)
ErrorOr<void> Decoder::reconstruct(size_t, u32, u32, TXSize)
{
// TODO: Implement
return true;
return Error::from_string_literal("reconstruct not implemented");
}
bool Decoder::update_reference_frames()
ErrorOr<void> Decoder::update_reference_frames()
{
for (auto i = 0; i < NUM_REF_FRAMES; i++) {
dbgln("updating frame {}? {}", i, (m_parser->m_refresh_frame_flags & (1 << i)) == 1);
@ -179,7 +181,7 @@ bool Decoder::update_reference_frames()
// TODO: 1.3-1.7
}
// TODO: 2.1-2.2
return true;
return {};
}
}