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LibVideo: Parameterize coefficient skip parsing for VP9
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10ba956066
commit
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3 changed files with 20 additions and 20 deletions
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@ -244,13 +244,25 @@ ErrorOr<InterpolationFilter> TreeParser::parse_interpolation_filter(BitStream& b
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return value;
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}
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ErrorOr<bool> TreeParser::parse_skip(BitStream& bit_stream, ProbabilityTables const& probability_table, SyntaxElementCounter& counter, Optional<bool> const& above_skip, Optional<bool> const& left_skip)
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{
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// Probabilities
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u8 context = 0;
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context += static_cast<u8>(above_skip.value_or(false));
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context += static_cast<u8>(left_skip.value_or(false));
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u8 probability = probability_table.skip_prob()[context];
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auto value = TRY(parse_tree_new<bool>(bit_stream, { binary_tree }, [&](u8) { return probability; }));
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increment_counter(counter.m_counts_skip[context][value]);
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return value;
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}
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/*
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* Select a tree value based on the type of syntax element being parsed, as well as some parser state, as specified in section 9.3.1
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*/
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TreeParser::TreeSelection TreeParser::select_tree(SyntaxElementType type)
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{
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switch (type) {
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case SyntaxElementType::Skip:
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case SyntaxElementType::IsInter:
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case SyntaxElementType::CompMode:
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case SyntaxElementType::CompRef:
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@ -293,8 +305,6 @@ TreeParser::TreeSelection TreeParser::select_tree(SyntaxElementType type)
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u8 TreeParser::select_tree_probability(SyntaxElementType type, u8 node)
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{
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switch (type) {
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case SyntaxElementType::Skip:
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return calculate_skip_probability();
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case SyntaxElementType::IsInter:
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return calculate_is_inter_probability();
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case SyntaxElementType::CompMode:
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@ -350,16 +360,6 @@ u8 TreeParser::select_tree_probability(SyntaxElementType type, u8 node)
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#define ABOVE_SINGLE m_decoder.m_above_single
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#define LEFT_SINGLE m_decoder.m_left_single
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u8 TreeParser::calculate_skip_probability()
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{
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m_ctx = 0;
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if (AVAIL_U)
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m_ctx += m_decoder.m_skips[(m_decoder.m_mi_row - 1) * m_decoder.m_mi_cols + m_decoder.m_mi_col];
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if (AVAIL_L)
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m_ctx += m_decoder.m_skips[m_decoder.m_mi_row * m_decoder.m_mi_cols + m_decoder.m_mi_col - 1];
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return m_decoder.m_probability_tables->skip_prob()[m_ctx];
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}
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u8 TreeParser::calculate_is_inter_probability()
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{
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if (AVAIL_U && AVAIL_L) {
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@ -718,9 +718,6 @@ void TreeParser::count_syntax_element(SyntaxElementType type, int value)
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increment_counter(count);
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};
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switch (type) {
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case SyntaxElementType::Skip:
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increment(m_decoder.m_syntax_element_counter->m_counts_skip[m_ctx][value]);
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return;
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case SyntaxElementType::IsInter:
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increment(m_decoder.m_syntax_element_counter->m_counts_is_inter[m_ctx][value]);
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return;
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