Keep valid 4K startup through playlist timestamp round-off

docs/media-showcase.md

@@ -16,8 +16,8 @@ The recording label sits with the source caption below the player. It does
 not cover the picture or Safari’s native fullscreen control when controls
 appear.
 
-The player pins RelaySwarm source `7cef698203e03b2a1038d135590375caacfed922`
-([source change](https://github.com/forgesworn/relayswarm/commit/7cef698203e03b2a1038d135590375caacfed922)).
+The player pins RelaySwarm source `45616b8141987f88e6054e2fdfbeae34710e714b`
+([source change](https://github.com/forgesworn/relayswarm/commit/45616b8141987f88e6054e2fdfbeae34710e714b)).
 It retains the successful peer receipt's stats when hls.js disposes of the
 losing HTTP loader, covered by ten regressions using the actual hls.js 1.7.3
 loaders. It also retains a fully verified contiguous future prefix before considering
@@ -31,6 +31,11 @@ the original first-fragment load entry, clipped to a shorter parent load
 deadline; ordinary speculative requests keep their eight-second expiry.
 Authority checks and explicit refusal for insufficient capacity remain. The Rust/WASM
 binary is unchanged.
+Parsed fragment start positions can differ by floating-point roundoff between
+playlist revisions. Startup now accepts that difference within a bounded machine-precision
+tolerance, capped at one nanosecond, instead of falsely cancelling a matching context; sequence,
+continuity, level, key, size and duration checks remain authoritative. This
+correction does not establish stall-free or sustained 4K playback.
 When an owned whole-source response finishes and its key is already known,
 eligible retained bytes are announced with HAVE before its FETCH claim is
 withdrawn, including synchronous hls.js disposal. Unknown keys do not delay

scripts/build-media-peer-demo.mjs

@@ -7,7 +7,7 @@ import { tmpdir } from 'node:os';
 import { dirname, join, resolve } from 'node:path';
 import { fileURLToPath, pathToFileURL } from 'node:url';
 
-const SOURCE = '7cef698203e03b2a1038d135590375caacfed922';
+const SOURCE = '45616b8141987f88e6054e2fdfbeae34710e714b';
 const sha = bytes => createHash('sha256').update(bytes).digest('hex');
 const root = fileURLToPath(new URL('../', import.meta.url));
 

site/live-media.html

@@ -123,6 +123,6 @@
   </main>
   <!-- SHOWCASE_END -->
   <footer class="site-footer"><div class="page-wrap"><div class="footer-inner"><a class="brand" href="/">Forge<span>Sworn</span></a><div class="footer-links"><a href="https://github.com/forgesworn">GitHub</a><a href="/live-media-benchmarks.html">Measured results</a><a href="https://github.com/sponsors/TheCryptoDonkey">Support the work ↗</a></div></div><p class="footer-note">Open-source media software, yours to run.  The supplied mix is licensed for this demonstration; its media rights are separate from the MIT code.  <a href="/media/dejavu-preview/NOTICE.txt">Media permission</a> · <a href="/llms.txt">For developers and LLMs</a></p></div></footer>
-  <script type="module" src="/media-lab.mjs?v=20261027-startup-budget"></script>
+  <script type="module" src="/media-lab.mjs?v=20261027-position-roundoff"></script>
 </body>
 </html>

site/media-lab.html

@@ -123,6 +123,6 @@
   </main>
   <!-- SHOWCASE_END -->
   <footer class="site-footer"><div class="page-wrap"><div class="footer-inner"><a class="brand" href="/">Forge<span>Sworn</span></a><div class="footer-links"><a href="https://github.com/forgesworn">GitHub</a><a href="/live-media-benchmarks.html">Measured results</a><a href="https://github.com/sponsors/TheCryptoDonkey">Support the work ↗</a></div></div><p class="footer-note">Open-source media software, yours to run.  The supplied mix is licensed for this demonstration; its media rights are separate from the MIT code.  <a href="/media/dejavu-preview/NOTICE.txt">Media permission</a> · <a href="/llms.txt">For developers and LLMs</a></p></div></footer>
-  <script type="module" src="/media-lab.mjs?v=20261027-startup-budget"></script>
+  <script type="module" src="/media-lab.mjs?v=20261027-position-roundoff"></script>
 </body>
 </html>

site/media-lab.mjs

@@ -424,7 +424,7 @@ async function initialise() {
     publicRoom?.stop(); publicRoom = null;
     const pending = (async () => {
       const [{ createListenerSession }, { PUBLIC_SWARM_SOURCE_SHA256, PUBLIC_SWARM_RELAYS }] = await Promise.all([
-        import('./media-listener-session.mjs?v=20261027-startup-budget'), import('./media-public-swarm.mjs?v=20261027-startup-budget'),
+        import('./media-listener-session.mjs?v=20261027-position-roundoff'), import('./media-public-swarm.mjs?v=20261027-position-roundoff'),
       ]);
       if (request !== publicRoomRequest || pageAbort.signal.aborted) return null;
       const clock = createListenerSession({ room: `forgesworn-dejavu-listening-v${quality === 'full' ? 2 : 1}-${quality}`, source: PUBLIC_SWARM_SOURCE_SHA256,
@@ -1522,7 +1522,7 @@ async function initialise() {
       if (player) {
         let peer, setupEpoch;
         try {
-          const { createPublicSwarm, prepareRecordedSource, createRecordedLive } = await import('./media-public-swarm.mjs?v=20261027-startup-budget');
+          const { createPublicSwarm, prepareRecordedSource, createRecordedLive } = await import('./media-public-swarm.mjs?v=20261027-position-roundoff');
           if (!owns() || s.hls !== player) return;
           // These two exports share the exact helper module/recording brand.
           // A cold first room prepares locally before publishing its clock.

site/media-listener-session.mjs

@@ -1,7 +1,7 @@
 // Signed, short-lived observations of a shared listening clock. This is an
 // experimental public addressable event (NIP-01), not NIP-78 private app storage.
 // Relay partitions and dishonest clients prevent an authoritative audience count.
-import { finalizeEvent, generateSecretKey, verifyEvent } from './vendor/media-peer-demo.js?v=20261027-startup-budget';
+import { finalizeEvent, generateSecretKey, verifyEvent } from './vendor/media-peer-demo.js?v=20261027-position-roundoff';
 
 export const LISTENER_SESSION_KIND = 30378;
 export const LISTENER_TELEMETRY_KIND = 20378;

site/media-public-swarm.mjs

@@ -3,7 +3,7 @@
 // A receiver's ephemeral key wraps that digest for the existing live-commitment
 // verifier; this is local attestation, not a live broadcaster signing service.
 import { createHlsSwarm, commitmentContent, commitmentPieceSize, segmentMediaContext, KIND_SEGMENT_COMMITMENT, finalizeEvent,
-  generateSecretKey, relayswarmBuild } from './vendor/media-peer-demo.js?v=20261027-startup-budget';
+  generateSecretKey, relayswarmBuild } from './vendor/media-peer-demo.js?v=20261027-position-roundoff';
 import { observeOriginLoader } from './media-transfer-stats.mjs?v=20261027-visual-provenance';
 import { createPublicTurnCredentials } from './media-turn-credentials.mjs?v=20261025-prepared-room';
 import { parseRecordedManifest, createRecordedLive } from './media-recorded-live.mjs?v=20261025-prepared-room';
@@ -479,7 +479,7 @@ export function createPublicSwarm({ Hls, hls, video, playlistUrl, quality, signa
         swarm = createSwarm({ mode: 'peer-first', swarmId: plan.swarmId, relays: [...PUBLIC_SWARM_RELAYS],
           streamEvent, getCommitment, serve: true, serveOnCellular: false,
           coreWasm: new URL('./vendor/relayswarm-core.wasm?v=20261026-prepared-adoption', import.meta.url), multiHolder: true,
-          transferWorkerUrl: new URL('./vendor/relayswarm-transfer-worker.js?v=20261027-startup-budget', import.meta.url),
+          transferWorkerUrl: new URL('./vendor/relayswarm-transfer-worker.js?v=20261027-position-roundoff', import.meta.url),
           zeroBudgetPeerRace: true, lateHaveRace: true, sustainablePeerWait: true,
           warmAhead: false,
           startupBufferTarget: needsStartupBuffer ? () => {

site/template.html

@@ -1985,6 +1985,6 @@ <h2 class="reveal">Pick a block and start</h2>
       });
     });
   </script>
-  <script type="module" src="/media-lab.mjs?v=20261027-startup-budget"></script>
+  <script type="module" src="/media-lab.mjs?v=20261027-position-roundoff"></script>
 </body>
 </html>

site/vendor/media-peer-demo.NOTICE.txt

@@ -1,5 +1,5 @@
 RelaySwarm 0.4.4
-https://github.com/forgesworn/relayswarm/tree/7cef698203e03b2a1038d135590375caacfed922
+https://github.com/forgesworn/relayswarm/tree/45616b8141987f88e6054e2fdfbeae34710e714b
 
 MIT License
 

site/vendor/media-peer-demo.build.json

@@ -1,17 +1,17 @@
 {
   "schema": 1,
   "project": "https://github.com/forgesworn/relayswarm",
-  "sourceCommit": "7cef698203e03b2a1038d135590375caacfed922",
+  "sourceCommit": "45616b8141987f88e6054e2fdfbeae34710e714b",
   "version": "0.4.4",
-  "sourceArchiveSha256": "9af7459d83bb7a0102e3bbbd67d8482d05d10d018c9ab9dd6cb57e31d974a577",
+  "sourceArchiveSha256": "2a9f76f0f6f2e4144dd0988977b8383bb06403ffa79e08c11d1e6efaec1e2f7e",
   "packageLockSha256": "18a91b8d697ebcab1d259d4de876167dcbd4d47fc3c82196d179c4c490adca4a",
   "bundle": "media-peer-demo.js",
-  "bundleSha256": "f14a225beb6815344279dfa3bb983c3e00ffc6439d42a4e304164a3d08456bf2",
-  "bundleBytes": 261034,
+  "bundleSha256": "80a80ff9da3ef355afbf20afd9b0b9a409cd25698019e77e0f41745074b83c3f",
+  "bundleBytes": 261139,
   "transferWorker": {
     "file": "relayswarm-transfer-worker.js",
     "bytes": 7074,
-    "sha256": "0768f344604df39ad6805f0f8ac48fada171919ad05512a36ac83868002e3e7d",
+    "sha256": "1355ba213ac3f3e6934d01719c4f6ec98761dd7c796cbedf2056c1c5a20ba563",
     "source": "src/browser/core-transfer-worker-runtime.mjs"
   },
   "sourceMap": false,

site/vendor/relayswarm-core.NOTICE.txt

@@ -1,5 +1,5 @@
 RelaySwarm Rust/WebAssembly core
-https://github.com/forgesworn/relayswarm/tree/7cef698203e03b2a1038d135590375caacfed922
+https://github.com/forgesworn/relayswarm/tree/45616b8141987f88e6054e2fdfbeae34710e714b
 
 MIT License