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AAC parser: fix quadratic time during multiplex determination

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part of the fix of #3727
This commit is contained in:
Moritz Bunkus 2024-07-30 20:35:46 +02:00
parent 1b6842a183
commit ae95e11b63
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GPG Key ID: 74AF00ADF2E32C85
1 changed files with 8 additions and 1 deletions
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9
src/common/aac.cpp
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@ -751,6 +751,9 @@ parser_c::determine_multiplex_type(uint8_t const *new_buffer,
return true;
}
if (m_require_frame_at_first_byte)
return false;
std::vector<std::pair<multiplex_type_e, unsigned int>> multiplexes_to_try{ { loas_latm_multiplex, 0u }, { adif_multiplex, 0u } };
for (auto &multiplex : multiplexes_to_try) {
@ -766,8 +769,12 @@ parser_c::determine_multiplex_type(uint8_t const *new_buffer,
auto num_bytes = std::max<std::size_t>(std::min(result.second, remaining_bytes), 1);
position += num_bytes;
if (result.first == success)
if (result.first == success) {
++multiplex.second;
if (m_abort_after_num_frames && (multiplex.second >= m_abort_after_num_frames))
break;
}
}
}