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LibVideo: Parameterize TXSize parsing for the VP9 decoder
This commit is contained in:
Zaggy1024
Andrew Kaster
parent
cc735a7001
commit
93caa1e19d
3 changed files with 41 additions and 37 deletions
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@ -1090,10 +1090,15 @@ bool Parser::seg_feature_active(u8 feature)
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DecoderErrorOr<void> Parser::read_tx_size(bool allow_select)
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{
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m_max_tx_size = max_txsize_lookup[m_mi_size];
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if (allow_select && m_tx_mode == TXModeSelect && m_mi_size >= Block_8x8)
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m_tx_size = TRY_READ(m_tree_parser->parse_tree<TXSize>(SyntaxElementType::TXSize));
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else
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if (allow_select && m_tx_mode == TXModeSelect && m_mi_size >= Block_8x8) {
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Optional<bool> above_skip = m_available_u ? m_skips[get_image_index(m_mi_row - 1, m_mi_col)] : Optional<bool>();
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Optional<bool> left_skip = m_available_l ? m_skips[get_image_index(m_mi_row, m_mi_col - 1)] : Optional<bool>();
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Optional<TXSize> above_tx_size = m_available_u ? m_tx_sizes[get_image_index(m_mi_row - 1, m_mi_col)] : Optional<TXSize>();
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Optional<TXSize> left_tx_size = m_available_l ? m_tx_sizes[get_image_index(m_mi_row, m_mi_col - 1)] : Optional<TXSize>();
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m_tx_size = TRY_READ(TreeParser::parse_tx_size(*m_bit_stream, *m_probability_tables, *m_syntax_element_counter, m_max_tx_size, above_skip, left_skip, above_tx_size, left_tx_size));
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} else {
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m_tx_size = min(m_max_tx_size, tx_mode_to_biggest_tx_size[m_tx_mode]);
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}
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return {};
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}
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@ -257,6 +257,38 @@ ErrorOr<bool> TreeParser::parse_skip(BitStream& bit_stream, ProbabilityTables co
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return value;
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}
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ErrorOr<TXSize> TreeParser::parse_tx_size(BitStream& bit_stream, ProbabilityTables const& probability_table, SyntaxElementCounter& counter, TXSize max_tx_size, Optional<bool> above_skip, Optional<bool> left_skip, Optional<TXSize> above_tx_size, Optional<TXSize> left_tx_size)
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{
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// FIXME: Above and left contexts should be in structs.
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// Tree
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TreeParser::TreeSelection tree { tx_size_8_tree };
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if (max_tx_size == TX_16x16)
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tree = { tx_size_16_tree };
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if (max_tx_size == TX_32x32)
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tree = { tx_size_32_tree };
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// Probabilities
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auto above = max_tx_size;
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auto left = max_tx_size;
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if (above_skip.has_value() && !above_skip.value()) {
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above = above_tx_size.value();
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}
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if (left_skip.has_value() && !left_skip.value()) {
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left = left_tx_size.value();
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}
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if (!left_skip.has_value())
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left = above;
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if (!above_skip.has_value())
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above = left;
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auto context = (above + left) > max_tx_size;
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u8 const* probabilities = probability_table.tx_probs()[max_tx_size][context];
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auto value = TRY(parse_tree_new<TXSize>(bit_stream, tree, [&](u8 node) { return probabilities[node]; }));
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increment_counter(counter.m_counts_tx_size[max_tx_size][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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@ -273,12 +305,6 @@ TreeParser::TreeSelection TreeParser::select_tree(SyntaxElementType type)
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case SyntaxElementType::MVBit:
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case SyntaxElementType::MoreCoefs:
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return { binary_tree };
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case SyntaxElementType::TXSize:
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if (m_decoder.m_max_tx_size == TX_32x32)
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return { tx_size_32_tree };
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if (m_decoder.m_max_tx_size == TX_16x16)
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return { tx_size_16_tree };
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return { tx_size_8_tree };
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case SyntaxElementType::MVJoint:
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return { mv_joint_tree };
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case SyntaxElementType::MVClass:
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@ -322,8 +348,6 @@ u8 TreeParser::select_tree_probability(SyntaxElementType type, u8 node)
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case SyntaxElementType::MVBit:
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VERIFY(m_mv_bit < MV_OFFSET_BITS);
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return m_decoder.m_probability_tables->mv_bits_prob()[m_mv_component][m_mv_bit];
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case SyntaxElementType::TXSize:
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return calculate_tx_size_probability(node);
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case SyntaxElementType::MVJoint:
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return m_decoder.m_probability_tables->mv_joint_probs()[node];
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case SyntaxElementType::MVClass:
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@ -619,28 +643,6 @@ u8 TreeParser::calculate_single_ref_p2_probability()
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return m_decoder.m_probability_tables->single_ref_prob()[m_ctx][1];
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}
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u8 TreeParser::calculate_tx_size_probability(u8 node)
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{
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auto above = m_decoder.m_max_tx_size;
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auto left = m_decoder.m_max_tx_size;
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if (AVAIL_U) {
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auto u_pos = (m_decoder.m_mi_row - 1) * m_decoder.m_mi_cols + m_decoder.m_mi_col;
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if (!m_decoder.m_skips[u_pos])
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above = m_decoder.m_tx_sizes[u_pos];
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}
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if (AVAIL_L) {
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auto l_pos = m_decoder.m_mi_row * m_decoder.m_mi_cols + m_decoder.m_mi_col - 1;
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if (!m_decoder.m_skips[l_pos])
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left = m_decoder.m_tx_sizes[l_pos];
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}
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if (!AVAIL_L)
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left = above;
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if (!AVAIL_U)
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above = left;
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m_ctx = (above + left) > m_decoder.m_max_tx_size;
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return m_decoder.m_probability_tables->tx_probs()[m_decoder.m_max_tx_size][m_ctx][node];
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}
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void TreeParser::set_tokens_variables(u8 band, u32 c, u32 plane, TXSize tx_size, u32 pos)
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{
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m_band = band;
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@ -744,9 +746,6 @@ void TreeParser::count_syntax_element(SyntaxElementType type, int value)
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increment(m_decoder.m_syntax_element_counter->m_counts_mv_bits[m_mv_component][m_mv_bit][value]);
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m_mv_bit = 0xFF;
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return;
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case SyntaxElementType::TXSize:
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increment(m_decoder.m_syntax_element_counter->m_counts_tx_size[m_decoder.m_max_tx_size][m_ctx][value]);
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return;
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case SyntaxElementType::MVJoint:
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increment(m_decoder.m_syntax_element_counter->m_counts_mv_joint[value]);
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return;
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@ -73,6 +73,7 @@ public:
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static ErrorOr<PredictionMode> parse_inter_mode(BitStream&, ProbabilityTables const&, SyntaxElementCounter&, u8 mode_context_for_ref_frame_0);
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static ErrorOr<InterpolationFilter> parse_interpolation_filter(BitStream&, ProbabilityTables const&, SyntaxElementCounter&, Optional<ReferenceFrameType> above_ref_frame, Optional<ReferenceFrameType> left_ref_frame, Optional<InterpolationFilter> above_interpolation_filter, Optional<InterpolationFilter> left_interpolation_filter);
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static ErrorOr<bool> parse_skip(BitStream&, ProbabilityTables const&, SyntaxElementCounter&, Optional<bool> const& above_skip, Optional<bool> const& left_skip);
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static ErrorOr<TXSize> parse_tx_size(BitStream&, ProbabilityTables const&, SyntaxElementCounter&, TXSize max_tx_size, Optional<bool> above_skip, Optional<bool> left_skip, Optional<TXSize> above_tx_size, Optional<TXSize> left_tx_size);
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void set_default_intra_mode_variables(u8 idx, u8 idy)
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{
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@ -111,7 +112,6 @@ private:
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u8 calculate_comp_ref_probability();
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u8 calculate_single_ref_p1_probability();
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u8 calculate_single_ref_p2_probability();
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u8 calculate_tx_size_probability(u8 node);
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u8 calculate_token_probability(u8 node);
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u8 calculate_more_coefs_probability();
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