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<div class="brand" aria-label="DVIDIA">
<svg width="36" height="36" viewBox="0 0 64 64" aria-hidden="true"><rect width="64" height="64" rx="16" fill="#20231f"/><g fill="#f8f7f3"><rect x="8" y="20" width="4.6" height="24" rx="1.2" opacity=".28"/><rect x="14.1" y="20" width="4.6" height="24" rx="1.2" opacity=".38"/><rect x="20.2" y="20" width="4.6" height="24" rx="1.2" opacity=".48"/><rect x="26.3" y="20" width="4.6" height="24" rx="1.2" opacity=".58"/><rect x="32.4" y="20" width="4.6" height="24" rx="1.2" opacity=".68"/><rect x="38.5" y="20" width="4.6" height="24" rx="1.2" opacity=".78"/><rect x="44.6" y="20" width="4.6" height="24" rx="1.2" opacity=".9"/></g><rect x="50.7" y="20" width="4.6" height="24" rx="1.2" fill="#7394ff"/></svg>
<div><div class="wordmark">DVIDIA</div><small>Applied physical AI</small></div>
</div>
<div class="local"><span class="dot" aria-hidden="true"></span><span>Synthetic demo · Edits stay in your browser</span></div>
</header>
<main>
<div class="page-heading">
<div class="heading-copy"><div class="eyebrow">From footage to reviewed evidence</div><h1>Observation lab</h1><p id="episode-title">Loading the synthetic demo…</p></div>
<nav class="episode-nav" aria-label="Episode navigation"><span class="episode-count" id="episode-count">— / —</span><button id="previous" aria-label="Previous episode" disabled>←</button><button id="next" aria-label="Next episode" disabled>→</button></nav>
</div>
<div class="notice" id="error-notice" role="alert" hidden><p id="error-text"></p><button id="retry">Try again</button></div>
<details id="run-failures" class="failure-notice" hidden><summary id="failure-summary"></summary><ul id="failure-list"></ul></details>
<section class="demo-intro" aria-label="Synthetic demonstration scope">
<h2>Try the review workflow</h2>
<p>These two schematic clips and their sample boxes were authored for this demo. No detector, VLM or robot policy runs here. Play, edit, approve or reject an event, then save and download your review.</p>
<p id="demo-storage-status" role="status">Saved demo revisions stay in this browser. No footage or edits are uploaded.</p>
<nav aria-label="Observation Lab resources"><a href="https://github.com/Dvidia-Inference/dvidia-training/blob/observation-lab-v0.1.0/docs/observations.md" target="_blank" rel="noopener noreferrer">Install the local tool</a><a href="https://github.com/Dvidia-Inference/dvidia-training/blob/observation-lab-v0.1.0/benchmarks/observation-20261010/README.md" target="_blank" rel="noopener noreferrer">Read the actual pilot</a><a href="https://github.com/Dvidia-Inference/dvidia-training/blob/observation-lab-v0.1.0/docs/observation-models.md" target="_blank" rel="noopener noreferrer">Models and licenses</a><button id="reset-demo" type="button">Reset this browser’s demo</button></nav>
</section>
<div class="workspace" id="workspace" aria-busy="true">
<div class="footage-column">
<section class="video-card" aria-label="Episode footage and spatial observations">
<div class="video-stage" id="video-stage">
<video id="video" preload="metadata" playsinline aria-label="Episode footage"></video>
<div id="video-empty" class="video-state"><svg width="40" height="40" viewBox="0 0 40 40" fill="none" aria-hidden="true"><rect x="5" y="8" width="30" height="24" rx="5" stroke="currentColor" stroke-width="1.5"/><path d="m17 15 9 5-9 5V15Z" stroke="currentColor" stroke-width="1.5"/></svg><strong id="video-empty-title">A schematic clip, ready to review.</strong><p id="video-empty-text">Loading authored demonstration annotations.</p></div>
<div class="overlay" id="overlay" aria-hidden="true"></div>
<div class="video-tag" id="video-tag" hidden><span class="dot"></span><span id="video-tag-text">Sampled observations</span></div>
</div>
<div class="player-controls">
<button id="play" class="play-control" aria-label="Play episode" disabled>▶ Play</button>
<span id="time-readout" class="time-readout">0:00 / 0:00</span>
<span class="player-spacer"></span>
<label class="box-toggle"><input id="show-boxes" type="checkbox" checked> Boxes</label>
<label class="sr-only" for="speed">Playback speed</label><select id="speed" class="playback-speed"><option value="0.5">0.5×</option><option value="1" selected>1×</option><option value="1.5">1.5×</option><option value="2">2×</option></select>
</div>
</section>
<section class="timeline-card" aria-labelledby="timeline-heading">
<div class="section-head"><h2 id="timeline-heading">One shared timeline</h2><span class="small" id="box-summary">No sampled boxes yet</span></div>
<div class="seek-wrap"><label class="sr-only" for="seek">Seek episode in seconds</label><input id="seek" type="range" min="0" max="1" value="0" step="0.01" disabled></div>
<div class="timeline" aria-label="Timeline of raw observations and accepted draft events">
<div class="timeline-lane"><span class="lane-label">Authored</span><div id="raw-track" class="lane-track"></div></div>
<div class="timeline-lane"><span class="lane-label">Accepted</span><div id="accepted-track" class="lane-track"></div></div>
<div class="timeline-ticks" id="timeline-ticks"><span>0:00</span><span>—</span><span>—</span><span>—</span></div>
</div>
<p class="timeline-note">Boxes are sampled image annotations. Demo boxes were authored; no object detector or hand model ran.</p>
</section>
<section class="raw-section" aria-labelledby="raw-heading">
<div class="section-head"><div><h2 id="raw-heading">Authored observations <span id="raw-count" class="count">0</span></h2><p>Authored sample proposals. Select an event to review.</p></div><button id="add-event" disabled>+ Add missed event</button></div>
<div id="raw-events" class="chips"></div>
<p id="raw-empty" class="empty">No observations loaded.</p>
<div id="manual-section" hidden><h3 style="margin-top:20px">Added by reviewer</h3><div id="manual-events" class="chips"></div></div>
</section>
</div>
<aside class="review-column" aria-label="Event review">
<section class="panel">
<div class="panel-head"><h2>Review the moment</h2><p>Watch, adjust, then make a decision.</p></div>
<div class="panel-body">
<p id="editor-empty" class="small">Select a sample annotation or add an event you can verify.</p>
<form id="event-form" hidden>
<div class="editor-meta"><span id="event-origin" class="pill">Authored sample</span><span id="decision-pill" class="pill pending">Pending</span></div>
<div class="field"><label class="label" for="event-label">Event label</label><input id="event-label" maxlength="240" required autocomplete="off"></div>
<div class="time-fields"><div class="field"><label class="label" for="event-start">Start · seconds</label><input id="event-start" type="number" min="0" step="any" required inputmode="decimal"></div><div class="field"><label class="label" for="event-end">End · seconds</label><input id="event-end" type="number" min="0" step="any" required inputmode="decimal"></div></div>
<p id="timing-help" class="field-help">Use the timeline to check the boundaries.</p>
<div class="decision-buttons"><button id="approve" type="button" aria-pressed="false">✓ Approve</button><button id="reject" type="button" aria-pressed="false">× Reject</button></div>
<button id="reset-decision" type="button" class="reset-decision" hidden>Return to pending</button>
<button id="remove-manual" type="button" class="reset-decision" hidden>Remove this new event</button>
<p class="original-note" id="original-note"></p>
</form>
</div>
</section>
<section class="panel">
<div class="panel-body">
<div class="section-head"><h2>Accepted events <span id="accepted-count" class="count">0</span></h2><span id="draft-pill" class="pill">Saved</span></div>
<p id="accepted-empty" class="small" style="margin-top:11px">Nothing accepted yet.</p><div id="accepted-events" class="accepted-list"></div>
<div class="outcome-field"><label class="label" for="outcome">Observed outcome</label><select id="outcome" disabled><option value="unknown">Unknown</option><option value="visible_completion">Visible completion</option><option value="incomplete">Incomplete</option></select><p class="field-help">A reviewer’s visual assessment of this episode.</p></div>
<label class="completion-check"><input id="review-complete" type="checkbox" disabled><span>I have reviewed every event.<br><span class="small" id="pending-count">No episode loaded</span></span></label>
<button id="save" class="primary save-button" disabled>Save revision</button><p id="save-message" class="save-message" role="status" aria-live="polite">Waiting for an episode</p>
<button id="download" class="download-button" disabled>↓ Download saved review</button>
</div>
</section>
</aside>
<details class="evidence"><summary>Source, analysis and limitations</summary><dl id="provenance"></dl><p class="small">Accuracy has not been measured on this episode. An accepted visual event is not evidence of robot skill or task success.</p></details>
</div>
</main>
<footer class="footer"><span>DVIDIA · Synthetic workflow demo</span><span>Human review required · Accuracy not measured · Robot capability not evaluated</span></footer>
</div>
<dialog id="leave-dialog" aria-labelledby="leave-heading"><h2 id="leave-heading">Keep your review changes?</h2><p>Your current edits have not been saved to a revision.</p><div class="dialog-actions"><button id="stay">Keep reviewing</button><button id="discard">Discard edits</button><button id="save-leave" class="primary">Save & continue</button></div></dialog>
<script src="demo-adapter.js"></script>
<script>
(() => {
'use strict';
const $ = id => document.getElementById(id);
const state = { episodes:[], index:-1, episode:null, events:[], outcome:'unknown', complete:false, selected:null, dirty:false, loading:false, saving:false, targetIndex:null };
const copy = value => JSON.parse(JSON.stringify(value));
const finite = value => Number.isFinite(Number(value)) ? Number(value) : 0;
const duration = () => finite(state.episode?.duration_seconds) > 0 ? finite(state.episode.duration_seconds) : Math.max(0,Number.isFinite($('video').duration) ? $('video').duration : 0);
const stamp = value => { const s = Math.max(0, finite(value)); return `${Math.floor(s / 60)}:${String(Math.floor(s % 60)).padStart(2,'0')}`; };
const precise = value => `${finite(value).toFixed(2)}s`;
const setText = (id,value) => { $(id).textContent = String(value ?? ''); };
const node = (tag,text,className) => { const el = document.createElement(tag); if (text !== undefined) el.textContent = String(text); if (className) el.className = className; return el; };
const selected = () => state.events.find(event => event.id === state.selected);
const observation = event => (state.episode?.observations || []).find(raw => raw.id === (event.observation_id || event.id));
const api = window.DvidiaObservationDemo;
function error(message) { setText('error-text', message); setText('retry',state.episode ? 'Dismiss' : 'Try again'); $('error-notice').hidden = false; }
function clearError() { $('error-notice').hidden = true; }
function setBusy(value) { state.loading = value; $('workspace').setAttribute('aria-busy',String(value)); $('workspace').classList.toggle('busy',value); updateControls(); }
function updateControls() {
const loaded = !!state.episode, blocked = state.loading || state.saving;
$('previous').disabled = blocked || state.index <= 0;
$('next').disabled = blocked || state.index < 0 || state.index >= state.episodes.length - 1;
for (const id of ['add-event','outcome','review-complete']) $(id).disabled = !loaded || blocked;
$('save').disabled = !loaded || !state.dirty || blocked;
$('download').disabled = !loaded || state.dirty || blocked;
$('save-leave').disabled = blocked;
setText('save',state.saving ? 'Saving revision…' : 'Save revision');
}
function markDirty() {
state.dirty = true;
setText('save-message','Unsaved changes · Save to keep this review');
renderReviewSummary(); updateControls();
}
function eventChip(event,index,isRaw) {
const button = node('button',undefined,'event-chip'); button.type = 'button';
const eventId = isRaw ? state.events.find(item => item.observation_id === event.id || item.id === event.id)?.id : event.id;
button.setAttribute('aria-pressed',String(eventId === state.selected));
const label = event.label || 'Unlabeled observation';
button.setAttribute('aria-label',`${index + 1}. ${label}, ${precise(event.start_seconds)} to ${precise(event.end_seconds)}${isRaw ? ', authored sample' : ', added by reviewer'}`);
button.append(node('span',String(index + 1).padStart(2,'0'),'chip-number'));
const text = node('span',undefined,'chip-copy'); text.append(node('span',label,'chip-title'),node('span',`${precise(event.start_seconds)} — ${precise(event.end_seconds)}`,'chip-time')); button.append(text);
button.addEventListener('click',() => selectEvent(eventId,true)); return button;
}
function renderEvents() {
const raw = state.episode?.observations || [];
$('raw-events').replaceChildren(...raw.map((event,index) => eventChip(event,index,true)));
setText('raw-count',raw.length); $('raw-empty').hidden = raw.length > 0;
setText('raw-empty',state.episode ? 'No event observations were produced. Watch the footage and add any events you can verify.' : 'No observations loaded.');
const manual = state.events.filter(event => !observation(event));
$('manual-section').hidden = manual.length === 0;
$('manual-events').replaceChildren(...manual.map((event,index) => eventChip(event,index,false)));
}
function renderTimeline() {
const total = duration() || 1;
for (const [id,events,approved] of [['raw-track',state.episode?.observations || [],false],['accepted-track',state.events.filter(event => event.decision === 'approved'),true]]) {
const track = $(id); track.replaceChildren();
for (const event of events) {
const block = node('span',undefined,`timeline-segment${approved ? ' approved' : ''}`);
const start = Math.max(0,Math.min(total,finite(event.start_seconds))), end = Math.max(start,Math.min(total,finite(event.end_seconds)));
block.style.left = `${start / total * 100}%`; block.style.width = `${(end - start) / total * 100}%`;
block.title = `${event.label}: ${precise(start)} – ${precise(end)}`; track.append(block);
}
track.append(node('span',undefined,'timeline-cursor'));
}
$('timeline-ticks').replaceChildren(...[0,total / 3,total * 2 / 3,total].map(time => node('span',stamp(time))));
updatePlayback();
}
function renderReviewSummary() {
const approved = state.events.filter(event => event.decision === 'approved');
setText('accepted-count',approved.length); $('accepted-empty').hidden = approved.length > 0;
$('accepted-events').replaceChildren(...approved.map(event => {
const row = node('button',undefined,'accepted-row'); row.type = 'button'; row.append(node('strong',event.label),node('span',`${precise(event.start_seconds)}–${precise(event.end_seconds)}`)); row.addEventListener('click',() => selectEvent(event.id,true)); return row;
}));
setText('draft-pill',state.dirty ? 'Unsaved draft' : 'Saved');
const pending = state.events.filter(event => event.decision === 'pending').length;
const rejected = state.events.filter(event => event.decision === 'rejected').length;
setText('pending-count',`${pending} pending · ${rejected} rejected`);
renderTimeline();
}
function renderEditor() {
const event = selected(); $('event-form').hidden = !event; $('editor-empty').hidden = !!event;
if (!event) return;
const raw = observation(event);
setText('event-origin',raw ? 'Authored sample' : 'Added by reviewer');
setText('decision-pill',event.decision.charAt(0).toUpperCase() + event.decision.slice(1));
$('decision-pill').className = `pill ${event.decision}`;
$('event-label').value = event.label; $('event-start').value = finite(event.start_seconds); $('event-end').value = finite(event.end_seconds);
$('event-start').max = $('event-end').max = duration() || '';
$('approve').setAttribute('aria-pressed',String(event.decision === 'approved')); $('reject').setAttribute('aria-pressed',String(event.decision === 'rejected')); $('reset-decision').hidden = event.decision === 'pending';
$('remove-manual').hidden = !!raw || (state.episode.review?.events || []).some(saved => saved.id === event.id);
const confidence = raw && Number.isFinite(raw.confidence) ? ` · Authored example score ${raw.confidence.toFixed(2)} (uncalibrated)` : '';
setText('original-note',raw ? `Original: ${raw.label || 'Unlabeled observation'} · ${precise(raw.start_seconds)}–${precise(raw.end_seconds)}${confidence}. This original record stays unchanged.` : 'This event was added during human review. It has no detector score or generated bounding box.');
$('event-label').setCustomValidity(''); $('event-end').setCustomValidity('');
}
function selectEvent(id,seek) {
if (!id) return;
if (id !== state.selected && !captureEditor()) { $('event-form').reportValidity(); return; }
state.selected = id; renderEvents(); renderEditor();
if (seek && selected()) { $('video').currentTime = Math.min(duration(),finite(selected().start_seconds)); updatePlayback(); }
if (seek && window.matchMedia('(max-width:820px)').matches) document.querySelector('.review-column').scrollIntoView({block:'start',behavior:'auto'});
}
function captureEditor() {
const event = selected(); if (!event) return true;
const label = $('event-label').value.trim(), start = $('event-start').valueAsNumber, end = $('event-end').valueAsNumber;
$('event-label').setCustomValidity(label ? '' : 'Enter a label for this event.');
$('event-end').setCustomValidity(Number.isFinite(end) && end > start ? '' : 'End must be later than start.');
if (!$('event-form').checkValidity()) return false;
const changed = event.label !== label || event.start_seconds !== start || event.end_seconds !== end;
Object.assign(event,{label,start_seconds:start,end_seconds:end});
if (changed) { state.complete = false; $('review-complete').checked = false; markDirty(); renderEvents(); }
return true;
}
function decide(decision) {
if (!captureEditor()) { $('event-form').reportValidity(); return; }
const event = selected(); if (!event) return; event.decision = decision; state.complete = false; $('review-complete').checked = false;
markDirty(); renderEditor(); setText('save-message',`${decision === 'approved' ? 'Approved in draft' : decision === 'rejected' ? 'Rejected in draft' : 'Returned to pending'} · Save to keep this review`);
}
function renderProvenance() {
const episode = state.episode, source = episode.source || {}, recipe = episode.recipe || {}, metrics = episode.metrics || {};
const kind = {public:'Public source',synthetic:'Synthetic fixture',user_authorized:'User-authorized footage'}[source.kind] || source.kind || 'Not supplied';
const model = recipe.model, modelLabel = typeof model === 'string' ? model : model?.kind || 'Not supplied';
const rows = [['Source',kind],['Credit',source.credit || 'Not supplied'],['License',source.license || 'Not supplied'],['Source hash',source.sha256 || 'Not supplied'],['Recipe',recipe.id || 'Not supplied'],['Model',modelLabel],['Analysis',`${Number.isFinite(metrics.frames) ? metrics.frames + ' sampled frames' : 'Frame count not supplied'}${Number.isFinite(metrics.detected_frames) ? ' · ' + metrics.detected_frames + ' with detections' : ''}${Number.isFinite(metrics.elapsed_seconds) ? ' · ' + metrics.elapsed_seconds.toFixed(1) + 's elapsed' : ''}`],['Review',`Revision ${episode.review?.revision ?? 0} · ${episode.review?.status || 'unreviewed'}`]];
if (source.source_url) rows.push(['Source page',source.source_url]);
if (Array.isArray(model?.models)) for (const asset of model.models) rows.push([asset.role || 'Model file',`${asset.name || 'Name not supplied'} · ${asset.license || 'License not supplied'}`]);
if (recipe.notes) rows.push(['Notes',typeof recipe.notes === 'string' ? recipe.notes : JSON.stringify(recipe.notes)]);
$('provenance').replaceChildren(...rows.flatMap(([key,value]) => [node('dt',key),node('dd',value)]));
}
function acceptEpisode(episode,index,keepTime) {
const oldTime = $('video').currentTime || 0, oldId = state.episode?.id;
const raw = Array.isArray(episode.observations) ? episode.observations : [];
episode.observations = raw;
const existing = Array.isArray(episode.review?.events) ? episode.review.events : [];
state.events = copy(existing);
for (const item of raw) if (!state.events.some(event => event.observation_id === item.id || event.id === item.id)) state.events.push({id:item.id,observation_id:item.id,label:item.label || '',start_seconds:finite(item.start_seconds),end_seconds:finite(item.end_seconds),decision:'pending'});
state.events.forEach(event => { if (!['pending','approved','rejected'].includes(event.decision)) event.decision = 'pending'; });
state.episode = episode; state.index = index; state.outcome = ['unknown','visible_completion','incomplete'].includes(episode.review?.outcome) ? episode.review.outcome : 'unknown'; state.complete = episode.review?.status === 'reviewed'; state.dirty = false;
state.selected = state.events.some(event => event.id === state.selected) ? state.selected : state.events[0]?.id || null;
setText('episode-title',`${episode.source?.kind === 'synthetic' ? 'Synthetic fixture · ' : ''}${episode.title || episode.id}`); setText('episode-count',`${index + 1} / ${state.episodes.length} episodes`);
setText('video-tag-text',episode.source?.kind === 'synthetic' ? 'Synthetic fixture · Authored boxes' : 'Authored sample annotations');
$('outcome').value = state.outcome; $('review-complete').checked = state.complete;
const url = episode.video_url;
if (typeof url === 'string' && url) {
const parsed = new URL(url,location.href);
if (parsed.origin !== location.origin) throw new Error('The demo only plays its included same-origin synthetic clips.');
if (oldId !== episode.id || !$('video').getAttribute('src')) { $('video').src = parsed.href; $('video').load(); }
else if (keepTime) $('video').currentTime = oldTime;
$('video-empty').hidden = true; $('video-tag').hidden = false;
} else { $('video').removeAttribute('src'); $('video').load(); $('video-empty').hidden = false; $('video-tag').hidden = true; setText('video-empty-title','No playable footage in this episode.'); setText('video-empty-text','The observation record is available for inspection.'); }
renderEvents(); renderEditor(); renderReviewSummary(); renderProvenance(); updateControls();
setText('save-message',`Revision ${episode.review?.revision ?? 0} · ${state.complete ? 'Review complete' : 'Human review required'}`);
}
async function loadEpisode(index) {
setBusy(true); clearError(); $('video').pause();
try { const episode = await api.episode(state.episodes[index].id); acceptEpisode(episode,index,false); }
catch (err) { error(err.message); }
finally { setBusy(false); }
}
async function initialize() {
setBusy(true); clearError();
try {
const result = await api.list(); state.episodes = Array.isArray(result) ? result : result.episodes || [];
const failures = Array.isArray(result.failures) ? result.failures : [];
$('run-failures').hidden = failures.length === 0;
setText('failure-summary',`${failures.length} ${failures.length === 1 ? 'episode could' : 'episodes could'} not be analyzed · View failures`);
$('failure-list').replaceChildren(...failures.map(failure => node('li',`${failure.id || 'Episode'}: ${failure.error || 'Analysis failed; inspect the local run receipt.'}`)));
if (!state.episodes.length) { setText('episode-title','No episodes available yet.'); setText('video-empty-title','Your next review starts with footage.'); setText('video-empty-text','Add an episode through the local observation workflow, then refresh this page.'); setText('raw-empty','No model output or review data has been loaded.'); setText('save-message','No episode to review'); setText('episode-count','0 episodes'); return; }
const wanted = new URLSearchParams(location.search).get('episode'); const index = Math.max(0,state.episodes.findIndex(episode => episode.id === wanted));
const episode = await api.episode(state.episodes[index].id); acceptEpisode(episode,index,false);
} catch (err) { error(err.message); setText('episode-title','The synthetic demo could not be loaded.'); setText('video-empty-title','Unable to load this episode.'); setText('video-empty-text','Refresh the demo, then try again.'); }
finally { setBusy(false); }
}
async function save() {
if (!captureEditor()) { $('event-form').reportValidity(); return false; }
if (!state.episode || state.saving) return false;
const invalid = state.events.find(event => !event.label.trim() || !Number.isFinite(event.start_seconds) || !Number.isFinite(event.end_seconds) || event.start_seconds < 0 || event.end_seconds <= event.start_seconds || event.end_seconds > duration() + .01);
if (invalid) { selectEvent(invalid.id,false); error('Check each event label and timing. Events must fit within this episode.'); return false; }
if (state.complete && state.events.some(event => event.decision === 'pending')) { error('Decide on every event before marking this review complete. You can save an unfinished review with the checkbox cleared.'); return false; }
state.saving = true; clearError(); updateControls();
try {
await api.save(state.episode.id,{base_revision:state.episode.review?.revision ?? 0,events:copy(state.events),outcome:state.outcome,status:state.complete ? 'reviewed' : 'in_review'});
const episode = await api.episode(state.episode.id); acceptEpisode(episode,state.index,true);
setText('save-message',`Saved in this browser · Revision ${episode.review?.revision ?? 0} · ${state.complete ? 'Review complete' : 'Review in progress'}`); return true;
} catch (err) { error(err.message); setText('save-message','Could not verify a saved revision · Edits kept here'); return false; }
finally { state.saving = false; updateControls(); }
}
function navigate(index) {
if (index < 0 || index >= state.episodes.length) return;
captureEditor();
if (state.dirty) { state.targetIndex = index; $('leave-dialog').showModal(); return; }
loadEpisode(index);
}
function fitOverlay() {
const video = $('video'), stage = $('video-stage'), ratio = video.videoWidth / video.videoHeight;
if (!Number.isFinite(ratio) || !ratio) { $('overlay').replaceChildren(); return; }
let width = stage.clientWidth, height = width / ratio;
if (height > stage.clientHeight) { height = stage.clientHeight; width = height * ratio; }
Object.assign($('overlay').style,{width:`${width}px`,height:`${height}px`,left:`${(stage.clientWidth-width)/2}px`,top:`${(stage.clientHeight-height)/2}px`});
}
function renderBoxes() {
const overlay = $('overlay'); overlay.replaceChildren();
if (!state.episode || !$('show-boxes').checked) { setText('box-summary',$('show-boxes').checked ? 'No sampled boxes yet' : 'Boxes hidden'); return; }
const time = $('video').currentTime || 0, samples = [];
for (const raw of state.episode.observations) {
const boxes = Array.isArray(raw.boxes) ? raw.boxes : [];
const nearest = boxes.reduce((best,box) => Math.abs(finite(box.time_seconds) - time) < Math.abs(finite(best?.time_seconds ?? -10000) - time) ? box : best,null);
if (!nearest || Math.abs(finite(nearest.time_seconds) - time) > .25) continue;
for (const box of boxes.filter(box => Math.abs(finite(box.time_seconds) - finite(nearest.time_seconds)) < .001)) samples.push({...box,label:box.label || raw.label});
}
const seen = new Set(); let visible = 0;
for (const sample of samples) {
if (!Array.isArray(sample.xyxy) || sample.xyxy.length !== 4 || !sample.xyxy.every(Number.isFinite)) continue;
const [x1,y1,x2,y2] = sample.xyxy.map(value => Math.min(1,Math.max(0,value))); if (x2 <= x1 || y2 <= y1) continue;
const key = [x1,y1,x2,y2,sample.label].join('|'); if (seen.has(key)) continue; seen.add(key);
const box = node('div',undefined,`bounding-box${sample.accepted ? ' accepted' : ''}${y1 < .1 ? ' near-top' : ''}`);
Object.assign(box.style,{left:`${x1*100}%`,top:`${y1*100}%`,width:`${(x2-x1)*100}%`,height:`${(y2-y1)*100}%`}); box.append(node('span',sample.label || 'Detected object','box-label')); overlay.append(box); visible++;
}
setText('box-summary',visible ? `${visible} sampled ${visible === 1 ? 'box' : 'boxes'} · ${stamp(time)}` : 'No sampled boxes at this time');
}
function updatePlayback() {
const video = $('video'), total = duration(), time = video.currentTime || 0;
setText('time-readout',`${stamp(time)} / ${stamp(total)}`); $('seek').max = total || 1; $('seek').value = time; $('seek').disabled = !total; $('seek').setAttribute('aria-valuetext',`${precise(time)} of ${precise(total)}`);
$('play').disabled = !video.getAttribute('src') || !total;
setText('play',video.paused ? '▶ Play' : 'Ⅱ Pause'); $('play').setAttribute('aria-label',video.paused ? 'Play episode' : 'Pause episode');
for (const cursor of document.querySelectorAll('.timeline-cursor')) cursor.style.left = `${total ? Math.min(100,time / total * 100) : 0}%`;
renderBoxes();
}
$('play').addEventListener('click',async () => { const video = $('video'); if (video.paused) { try { await video.play(); } catch { error('This browser could not play the synthetic video. The observation record is still available for review.'); } } else video.pause(); });
$('seek').addEventListener('input',() => { $('video').currentTime = finite($('seek').value); updatePlayback(); });
$('speed').addEventListener('change',() => { $('video').playbackRate = finite($('speed').value); });
$('show-boxes').addEventListener('change',renderBoxes);
for (const name of ['timeupdate','play','pause','ended']) $('video').addEventListener(name,updatePlayback);
let frameRequest = null;
const frameVideo = $('video');
function stopFrames() { if (frameRequest !== null) { if (frameVideo.cancelVideoFrameCallback) frameVideo.cancelVideoFrameCallback(frameRequest); else cancelAnimationFrame(frameRequest); frameRequest = null; } }
function nextFrame() { if (frameVideo.paused || frameVideo.ended) { frameRequest = null; return; } renderBoxes(); frameRequest = frameVideo.requestVideoFrameCallback ? frameVideo.requestVideoFrameCallback(nextFrame) : requestAnimationFrame(nextFrame); }
frameVideo.addEventListener('play',() => { stopFrames(); nextFrame(); }); frameVideo.addEventListener('pause',stopFrames); frameVideo.addEventListener('ended',stopFrames);
$('video').addEventListener('loadedmetadata',() => { fitOverlay(); renderTimeline(); updatePlayback(); });
$('video').addEventListener('error',() => { if (!$('video').getAttribute('src')) return; $('video-empty').hidden = false; setText('video-empty-title','This video could not be played.'); setText('video-empty-text','Try a browser with MP4/H.264 playback; the sample annotation remains available.'); $('play').disabled = true; });
if ('ResizeObserver' in window) new ResizeObserver(() => { fitOverlay(); renderBoxes(); }).observe($('video-stage')); else window.addEventListener('resize',fitOverlay);
$('event-form').addEventListener('submit',event => event.preventDefault());
for (const id of ['event-label','event-start','event-end']) { $(id).addEventListener('input',() => { if (!state.dirty) markDirty(); state.complete = false; $('review-complete').checked = false; }); $(id).addEventListener('change',captureEditor); }
$('approve').addEventListener('click',() => decide('approved')); $('reject').addEventListener('click',() => decide('rejected')); $('reset-decision').addEventListener('click',() => decide('pending'));
$('remove-manual').addEventListener('click',() => {
const event = selected(); if (!event || observation(event) || (state.episode.review?.events || []).some(saved => saved.id === event.id)) return;
state.events = state.events.filter(item => item.id !== event.id); state.selected = state.events[0]?.id || null;
state.complete = false; $('review-complete').checked = false; markDirty(); renderEvents(); renderEditor();
});
$('add-event').addEventListener('click',() => {
if (!captureEditor()) { $('event-form').reportValidity(); return; }
const total = duration(); if (total <= 0) { error('The episode duration is unavailable. Load playable footage before adding an event.'); return; }
const start = Math.min(Math.max(0,total-.01),Number(($('video').currentTime || 0).toFixed(2))), id = `manual-${crypto.randomUUID()}`;
state.events.push({id,observation_id:null,label:'',start_seconds:start,end_seconds:Math.min(total,Number((start+1).toFixed(2))),decision:'pending'});
state.complete = false; $('review-complete').checked = false; state.selected = id; markDirty(); renderEvents(); renderEditor(); $('event-label').focus();
});
$('outcome').addEventListener('change',() => { state.outcome = $('outcome').value; markDirty(); });
$('review-complete').addEventListener('change',() => { state.complete = $('review-complete').checked; markDirty(); });
$('save').addEventListener('click',save);
$('download').addEventListener('click',() => {
if (!state.episode || state.dirty) return;
const receipt = {episode_id:state.episode.id,source_sha256:state.episode.source?.sha256 || null,review:state.episode.review || {revision:0,status:'unreviewed',outcome:'unknown',events:[]}};
const url = URL.createObjectURL(new Blob([JSON.stringify(receipt,null,2)+'\n'],{type:'application/json'})), link = node('a'); link.href = url; link.download = `${String(state.episode.id).replace(/[^a-z0-9_-]/gi,'-')}.review-r${state.episode.review?.revision ?? 0}.json`; document.body.append(link); link.click(); link.remove(); setTimeout(() => URL.revokeObjectURL(url),1000);
});
$('previous').addEventListener('click',() => navigate(state.index-1)); $('next').addEventListener('click',() => navigate(state.index+1));
$('stay').addEventListener('click',() => $('leave-dialog').close()); $('discard').addEventListener('click',() => { $('leave-dialog').close(); loadEpisode(state.targetIndex); }); $('save-leave').addEventListener('click',async () => { if (await save()) { $('leave-dialog').close(); loadEpisode(state.targetIndex); } });
$('retry').addEventListener('click',() => { if (state.episode) clearError(); else initialize(); });
window.addEventListener('beforeunload',event => { if (state.dirty) { event.preventDefault(); event.returnValue = ''; } });
$('reset-demo').addEventListener('click',async () => {
if (!confirm('Reset only this browser’s demo reviews? Download saved reviews first if you want to keep them.')) return;
await api.reset(); location.reload();
});
initialize();
})();
</script>
</body>
</html>
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