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LibVideo: Move parsing of Partition to its own TreeParser function

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This adds a tree-parsing function that can be called statically from
specific trees' implementations in TreeParser, of which Partition is
the first. This way, all calls to tree parses will take the context
they need to be able to select a tree and probabilities, which will
allow removal of the state dependence in TreeParser on fields from
itself and Parser.
This commit is contained in:
Zaggy1024 2022-11-06 15:02:24 -06:00 • committed by Andrew Kaster
parent 69e6feaf32
commit 6192a33e79
3 changed files with 91 additions and 50 deletions
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2
Userland/Libraries/LibVideo/VP9/Parser.cpp
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@ -916,7 +916,7 @@ DecoderErrorOr<void> Parser::decode_partition(u32 row, u32 col, BlockSubsize blo
m_has_cols = (col + half_block_8x8) < m_mi_cols;
m_row = row;
m_col = col;
auto partition = TRY_READ(m_tree_parser->parse_tree(SyntaxElementType::Partition));
auto partition = TRY_READ(TreeParser::parse_partition(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, m_has_rows, m_has_cols, m_block_subsize, m_num_8x8, m_above_partition_context, m_left_partition_context, row, col, m_frame_is_intra));
auto subsize = subsize_lookup[partition][block_subsize];
if (subsize < Block_8x8 || partition == PartitionNone) {