5f386111ad
Pays the debt from the truncated audit. The census prints population, coverage and skips in the same output, and ends with an explicit END line, so a cut-short run cannot be read as a complete one. POPULATION 104 movies; COVERAGE 95 resolved, 9 unresolved, 0 unreadable 70 one-chunk regions, 25 three-chunk regions The port's 25 was right; my '8 of 10' was not a count. Cross-referenced against the fix's own sweep, which also ran to completion (78 + 17 + 9 = 104): all 17 changed regions are three-chunk, none is one-chunk, and 8 three-chunk regions were never affected -- which the 1.5 MB cap predicts, since a region only trips the filter if its span exceeds it. So 'the defect is specific to the multichannel regions' survives with complete populations on both sides, while 'all three-chunk regions were broken' does not. The original 8-of-10 was wrong in its denominator and coincidentally shares a digit with the 8 that are unaffected, which is the kind of resemblance that carries a dead number into a later document. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Wuu56cE8vJGTBtn1ppsk8v
51 lines
2.5 KiB
Rust
51 lines
2.5 KiB
Rust
//! How many voice regions hold three chunks? A COUNT, stated with its population.
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//!
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//! `voice-region-starts-late.md` published "8 of 10 three-chunk regions start
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//! mid-stream". The port agent counts **25** three-chunk regions. Mine was not a
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//! count: the audit that produced it was cut short and I read a partial file as a
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//! complete one — it ends mid-list with no summary line.
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//!
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//! This does the cheap half properly. It does not step backwards looking for the
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//! clip; it resolves each region once and counts its chunks, and it prints the
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//! population, the coverage and the skips **in the same output** so a truncated run
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//! cannot be mistaken for a complete one.
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//!
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//! cargo run -p sylpheed-formats --example voice_region_chunk_census
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use sylpheed_formats::media::{self, DirectorySource, DiscSource};
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use sylpheed_formats::movie_manifest;
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use sylpheed_formats::slb::{self, VoiceLang};
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use std::collections::BTreeMap;
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fn main() {
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let disc = std::env::var("SYLPHEED_DISC").expect("SYLPHEED_DISC");
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let src = DirectorySource::new(std::path::PathBuf::from(&disc));
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let tpak = src.open_pak("dat/tables.pak").expect("tables.pak");
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let manifest = tpak
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.entries().iter()
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.find_map(|e| tpak.read(e).ok().filter(|b| movie_manifest::is_manifest(b)))
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.expect("manifest");
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let movies: Vec<String> = movie_manifest::parse(&manifest).into_iter().map(|m| m.movie).collect();
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let total = movies.len();
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let mut hist: BTreeMap<usize, Vec<String>> = BTreeMap::new();
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let (mut resolved, mut unresolved, mut unreadable) = (0, 0, 0);
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for movie in movies {
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let Some((start, end)) = media::resolve_movie_voice_region(&src, &movie, VoiceLang::English)
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else { unresolved += 1; continue };
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let Ok(b) = src.read_segment_range("dat/sound", start, (end - start) as usize)
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else { unreadable += 1; continue };
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resolved += 1;
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hist.entry(slb::to_xma_riffs(&b).len()).or_default().push(movie);
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}
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println!("POPULATION: {total} movies in the manifest");
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println!("COVERAGE: {resolved} resolved and read, {unresolved} unresolved, {unreadable} unreadable");
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println!(" {} accounted for\n", resolved + unresolved + unreadable);
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for (n, ms) in &hist {
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println!(" {n} chunk(s): {:>3} region(s) {}", ms.len(),
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ms.iter().cloned().collect::<Vec<_>>().join(" "));
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}
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println!("\nTHREE-CHUNK REGIONS: {}", hist.get(&3).map(|v| v.len()).unwrap_or(0));
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println!("--- END OF CENSUS (if this line is missing, the run did not finish) ---");
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}
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