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https://github.com/storytold/craft-libs.git
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Dylan M. Taylor
58b02d4e6a
Carved from FilmCraft's filmcraft-captions (crates/captions at 4bec22bd): the file readers and writers, CEA-608/708 coding, format detection and the cue document. Rendering and the mapping onto FilmCraft's caption tracks stay there. - time: the crate has its own exact Tick (1/254016000000 s) and rational FrameRate, the subset of filmcraft-time the formats use. - TTML is read through craft-xml instead of roxmltree: no entity expansion, nesting bounded by the reader (128 levels, as before). - parse refuses input over 64 MiB and keeps at most 1,000,000 cues. - MCC and EBU STL name the caller's program (WriteOptions::program). - plain_text (inline tag stripping) moves with the SCC/MCC writers that need it.
40 lines
2.0 KiB
Rust
40 lines
2.0 KiB
Rust
use craft_captions::{Cue, Document, Format, TICKS_PER_SECOND, Tick, WriteOptions, parse, write};
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fn cue() -> Cue {
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Cue { start: Tick(TICKS_PER_SECOND), end: Tick(2 * TICKS_PER_SECOND), text: "Olá".into(), ..Default::default() }
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}
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/// TTML and DFXP exports write the document's language as `xml:lang`.
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#[test]
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fn ttml_and_dfxp_write_the_document_language() {
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let doc = Document { cues: vec![cue()], language: Some("pt-BR".into()), ..Default::default() };
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for format in [Format::Ttml, Format::Dfxp] {
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let xml = String::from_utf8(write(&doc, format, WriteOptions::default())).unwrap();
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assert!(xml.contains(r#"xml:lang="pt-BR""#), "{format:?}: {xml}");
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// and the language comes back on import
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let back = parse(xml.as_bytes(), format).unwrap();
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assert_eq!(back.language.as_deref(), Some("pt-BR"), "{format:?}");
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}
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// a document with no language still writes a valid tag
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let doc = Document { cues: vec![cue()], ..Default::default() };
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let xml = String::from_utf8(write(&doc, Format::Ttml, WriteOptions::default())).unwrap();
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assert!(xml.contains(r#"xml:lang="en""#), "{xml}");
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}
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/// An `xml:lang` that is empty or not a language tag leaves the language unknown.
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#[test]
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fn ttml_import_ignores_a_bad_xml_lang() {
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let tt =
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|lang: &str| format!(r#"<tt xmlns="http://www.w3.org/ns/ttml" xml:lang="{lang}"><body><div><p begin="1s" end="2s">Hi</p></div></body></tt>"#);
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let doc = parse(tt(" fr-CA ").as_bytes(), Format::Ttml).unwrap();
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assert_eq!((doc.language.as_deref(), doc.warnings.len()), (Some("fr-CA"), 0));
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let doc = parse(tt("").as_bytes(), Format::Ttml).unwrap();
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assert_eq!((doc.language, doc.warnings.len()), (None, 0));
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for bad in ["pt BR", "<x>", &"a".repeat(36)] {
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let doc = parse(tt(bad).as_bytes(), Format::Ttml).unwrap();
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assert_eq!(doc.language, None, "{bad}");
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assert_eq!(doc.warnings, ["ignored xml:lang: not a language tag"], "{bad}");
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assert_eq!(doc.cues.len(), 1);
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}
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}
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