20 lines
6.6 KiB
HTML
20 lines
6.6 KiB
HTML
<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="How big a download is going to be when the server will not say."><title>jellytau_lib::download::estimate - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../../static.files/rustdoc-17e0aaed.css"><meta name="rustdoc-vars" data-root-path="../../../" data-static-root-path="../../../static.files/" data-current-crate="jellytau_lib" data-themes="" data-resource-suffix="" data-rustdoc-version="1.97.1 (8bab26f4f 2026-07-14)" data-channel="1.97.1" data-search-js="search-fd9372ac.js" data-stringdex-js="stringdex-2da4960a.js" data-settings-js="settings-170eb4bf.js" ><script src="../../../static.files/storage-41dd4d93.js"></script><script defer src="../sidebar-items.js"></script><script defer src="../../../static.files/main-fcd733ba.js"></script><noscript><link rel="stylesheet" href="../../../static.files/noscript-f7c3ffd8.css"></noscript><link rel="alternate icon" type="image/png" href="../../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../../static.files/favicon-044be391.svg"></head><body class="rustdoc mod"><a class="skip-main-content" href="#main-content">Skip to main content</a><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Module estimate</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../../jellytau_lib/index.html">jellytau_<wbr>lib</a><span class="version">0.12.2</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Module estimate</a></h2><h3><a href="#structs">Module Items</a></h3><ul class="block"><li><a href="#structs" title="Structs">Structs</a></li><li><a href="#constants" title="Constants">Constants</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="../index.html">In jellytau_<wbr>lib::<wbr>download</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content" tabindex="-1"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../../index.html">jellytau_lib</a>::<wbr><a href="../index.html">download</a></div><h1>Module <span>estimate</span> <button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../../src/jellytau_lib/download/estimate.rs.html#1-181">Source</a> </span></div><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>How big a download is going to be when the server will not say.</p>
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<p>A direct copy answers with <code>Content-Length</code>, and the worker reports exact
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progress from it. A transcode is produced as it is sent — chunked, with no
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length — and the worker used to report <code>progress: 0.0</code> for its whole
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duration: an empty bar and “0%” while the byte count climbed for an hour.
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That is the case every film whose audio must be re-encoded lands in.</p>
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<p>The backend does know enough to estimate. It fetches the item to decide the
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audio policy anyway, and that item carries the source’s size and runtime;
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the preset it chose fixes the bitrate. So the estimate is made where the
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URL is, persisted on the row as its <code>file_size</code>, and used only as a
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fallback: a real <code>Content-Length</code> always wins, and an estimated bar never
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claims completion.</p>
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<p>TRACES: UR-071 | DR-290</p>
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</div></details><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><dl class="item-table"><dt><a class="struct" href="struct.ProgressTotal.html" title="struct jellytau_lib::download::estimate::ProgressTotal">Progress<wbr>Total</a></dt><dd>What the progress bar measures against.</dd></dl><h2 id="constants" class="section-header">Constants<a href="#constants" class="anchor">§</a></h2><dl class="item-table"><dt><a class="constant" href="constant.ESTIMATED_PROGRESS_CEILING.html" title="constant jellytau_lib::download::estimate::ESTIMATED_PROGRESS_CEILING">ESTIMATED_<wbr>PROGRESS_<wbr>CEILING</a></dt><dd>The progress bar never reports more than this from an estimate, so a source
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that encodes a little larger than predicted shows 99% until the last byte
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rather than 104% — completion is the worker’s to announce.</dd><dt><a class="constant" href="constant.TICKS_PER_SECOND.html" title="constant jellytau_lib::download::estimate::TICKS_PER_SECOND">TICKS_<wbr>PER_<wbr>SECOND</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Ticks per second in Jellyfin’s runtime unit.</dd></dl><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.expected_download_bytes.html" title="fn jellytau_lib::download::estimate::expected_download_bytes">expected_<wbr>download_<wbr>bytes</a></dt><dd>The size a download for <code>quality</code> is expected to produce, in bytes.</dd><dt><a class="fn" href="fn.progress_fraction.html" title="fn jellytau_lib::download::estimate::progress_fraction">progress_<wbr>fraction</a></dt><dd>The fraction complete, in <code>0.0..=1.0</code>. An estimated total is capped at
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<a href="constant.ESTIMATED_PROGRESS_CEILING.html" title="constant jellytau_lib::download::estimate::ESTIMATED_PROGRESS_CEILING"><code>ESTIMATED_PROGRESS_CEILING</code></a> so a prediction that ran low never shows a
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finished bar on a download still running.</dd><dt><a class="fn" href="fn.progress_total.html" title="fn jellytau_lib::download::estimate::progress_total">progress_<wbr>total</a></dt><dd>The total to report progress against, given what the response said and what
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was predicted before it was made. The server’s <code>Content-Length</code> always
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wins; the estimate fills in only when the server sent none.</dd></dl></section></div></main></body></html> |