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LibVideo: Parameterize segment ID parsing for the VP9 decoder
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parent
568e2fc1f2
commit
10ba956066
3 changed files with 21 additions and 28 deletions
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@ -1064,7 +1064,7 @@ DecoderErrorOr<void> Parser::intra_frame_mode_info()
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DecoderErrorOr<void> Parser::intra_segment_id()
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{
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if (m_segmentation_enabled && m_segmentation_update_map)
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m_segment_id = TRY_READ(m_tree_parser->parse_tree<u8>(SyntaxElementType::SegmentID));
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m_segment_id = TRY_READ(TreeParser::parse_segment_id(*m_bit_stream, m_segmentation_tree_probs));
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else
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m_segment_id = 0;
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return {};
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@ -1128,15 +1128,15 @@ DecoderErrorOr<void> Parser::inter_segment_id()
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return {};
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}
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if (!m_segmentation_temporal_update) {
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m_segment_id = TRY_READ(m_tree_parser->parse_tree<u8>(SyntaxElementType::SegmentID));
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m_segment_id = TRY_READ(TreeParser::parse_segment_id(*m_bit_stream, m_segmentation_tree_probs));
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return {};
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}
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auto seg_id_predicted = TRY_READ(m_tree_parser->parse_tree<bool>(SyntaxElementType::SegIDPredicted));
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auto seg_id_predicted = TRY_READ(TreeParser::parse_segment_id_predicted(*m_bit_stream, m_segmentation_pred_prob, m_left_seg_pred_context[m_mi_row], m_above_seg_pred_context[m_mi_col]));
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if (seg_id_predicted)
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m_segment_id = predicted_segment_id;
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else
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m_segment_id = TRY_READ(m_tree_parser->parse_tree<u8>(SyntaxElementType::SegmentID));
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m_segment_id = TRY_READ(TreeParser::parse_segment_id(*m_bit_stream, m_segmentation_tree_probs));
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for (size_t i = 0; i < num_8x8_blocks_wide_lookup[m_mi_size]; i++) {
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auto index = m_mi_col + i;
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@ -187,6 +187,21 @@ ErrorOr<PredictionMode> TreeParser::parse_uv_mode(BitStream& bit_stream, Probabi
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return value;
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}
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ErrorOr<u8> TreeParser::parse_segment_id(BitStream& bit_stream, u8 const probabilities[7])
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{
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auto value = TRY(parse_tree_new<u8>(bit_stream, { segment_tree }, [&](u8 node) { return probabilities[node]; }));
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// Segment ID is not counted.
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return value;
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}
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ErrorOr<bool> TreeParser::parse_segment_id_predicted(BitStream& bit_stream, u8 const probabilities[3], u8 above_seg_pred_context, u8 left_seg_pred_context)
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{
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auto context = left_seg_pred_context + above_seg_pred_context;
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auto value = TRY(parse_tree_new<bool>(bit_stream, { binary_tree }, [&](u8) { return probabilities[context]; }));
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// Segment ID prediction is not counted.
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return value;
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}
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ErrorOr<PredictionMode> TreeParser::parse_inter_mode(BitStream& bit_stream, ProbabilityTables const& probability_table, SyntaxElementCounter& counter, u8 mode_context_for_ref_frame_0)
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{
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// Tree
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@ -235,10 +250,7 @@ ErrorOr<InterpolationFilter> TreeParser::parse_interpolation_filter(BitStream& b
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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::SegmentID:
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return { segment_tree };
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case SyntaxElementType::Skip:
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case SyntaxElementType::SegIDPredicted:
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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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@ -281,12 +293,8 @@ 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::SegmentID:
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return calculate_segment_id_probability(node);
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case SyntaxElementType::Skip:
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return calculate_skip_probability();
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case SyntaxElementType::SegIDPredicted:
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return calculate_seg_id_predicted_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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@ -342,11 +350,6 @@ 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_segment_id_probability(u8 node)
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{
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return m_decoder.m_segmentation_tree_probs[node];
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}
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u8 TreeParser::calculate_skip_probability()
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{
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m_ctx = 0;
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@ -357,12 +360,6 @@ u8 TreeParser::calculate_skip_probability()
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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_seg_id_predicted_probability()
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{
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m_ctx = m_decoder.m_left_seg_pred_context[m_decoder.m_mi_row] + m_decoder.m_above_seg_pred_context[m_decoder.m_mi_col];
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return m_decoder.m_segmentation_pred_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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@ -779,10 +776,6 @@ void TreeParser::count_syntax_element(SyntaxElementType type, int value)
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case SyntaxElementType::MoreCoefs:
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increment(m_decoder.m_syntax_element_counter->m_counts_more_coefs[m_tx_size][m_plane > 0][m_decoder.m_is_inter][m_band][m_ctx][value]);
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return;
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case SyntaxElementType::SegmentID:
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case SyntaxElementType::SegIDPredicted:
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// No counting required
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return;
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default:
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break;
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}
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@ -68,6 +68,8 @@ public:
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static ErrorOr<PredictionMode> parse_intra_mode(BitStream&, ProbabilityTables const&, SyntaxElementCounter&, BlockSubsize mi_size);
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static ErrorOr<PredictionMode> parse_sub_intra_mode(BitStream&, ProbabilityTables const&, SyntaxElementCounter&);
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static ErrorOr<PredictionMode> parse_uv_mode(BitStream&, ProbabilityTables const&, SyntaxElementCounter&, PredictionMode y_mode);
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static ErrorOr<u8> parse_segment_id(BitStream&, u8 const probabilities[7]);
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static ErrorOr<bool> parse_segment_id_predicted(BitStream&, u8 const probabilities[3], u8 above_seg_pred_context, u8 left_seg_pred_context);
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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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@ -103,9 +105,7 @@ public:
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}
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private:
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u8 calculate_segment_id_probability(u8 node);
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u8 calculate_skip_probability();
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u8 calculate_seg_id_predicted_probability();
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u8 calculate_is_inter_probability();
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u8 calculate_comp_mode_probability();
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u8 calculate_comp_ref_probability();
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