Module events 

Available on crate feature analysis only.

ASS dialogue event analysis and processing

Provides comprehensive analysis capabilities for ASS dialogue events including timing validation, overlap detection, text analysis, and performance impact assessment. Designed for zero-copy efficiency with lifetime-generic references.

Features

• Timing Analysis: Overlap detection using O(n log n) sweep-line algorithm
• Text Processing: Override tag parsing and Unicode complexity detection
• Performance Scoring: Animation complexity and rendering impact assessment
• Zero-Copy Design: Minimal allocations via lifetime-generic spans
• Standards Compliance: Full ASS v4+ and libass 0.17.4+ compatibility

Performance Targets

• Event analysis: <1ms per dialogue event
• Overlap detection: <1ms for 1000 events
• Text parsing: <0.5ms per event text
• Memory usage: ~1.1x input size via zero-copy spans

Quick Start

use ass_core::analysis::events::{DialogueInfo, find_overlapping_events};
use ass_core::parser::Event;

let event = Event {
    start: "0:00:00.00",
    end: "0:00:05.00",
    text: "Hello {\\b1}world{\\b0}!",
    ..Default::default()
};

let info = DialogueInfo::analyze(&event)?;
println!("Duration: {}ms", info.duration_ms());
println!("Animation score: {}/10", info.animation_score());
println!("Performance impact: {:?}", info.performance_impact());

Module Organization

• dialogue_info - Individual event analysis and timing validation
• text_analysis - Text content parsing and Unicode complexity detection
• overlap - Efficient timing overlap detection algorithms
• utils - Collection operations like sorting and duration calculations

Re-exports

pub use dialogue_info::DialogueInfo;

pub use dialogue_info::TimingRelation;

pub use overlap::count_overlapping_events;

pub use overlap::find_overlapping_event_refs;

pub use overlap::find_overlapping_events;

pub use scoring::calculate_animation_score;

pub use scoring::calculate_complexity_score;

pub use scoring::get_performance_impact;

pub use scoring::PerformanceImpact;

pub use tags::calculate_tag_complexity;

pub use tags::parse_override_block;

pub use tags::DiagnosticKind;

pub use tags::OverrideTag;

pub use tags::TagDiagnostic;

pub use text_analysis::TextAnalysis;

pub use utils::calculate_average_duration;

pub use utils::calculate_total_duration;

pub use utils::count_overlapping_dialogue_events;

pub use utils::find_events_in_range;

pub use utils::find_overlapping_dialogue_events;

pub use utils::sort_events_by_time;

Modules

dialogue_info

Dialogue event analysis and information extraction

overlap

Event timing overlap detection using sweep-line algorithm

scoring

Complexity scoring algorithms for ASS events

tags

Override tag parsing and complexity analysis

text_analysis

Text content analysis for ASS dialogue events

utils

Utility functions for dialogue event analysis