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fix(denoise): ship the DeepFilterNet 3 worklet as a file so it starts in the desktop app #477

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jared merged 1 commits from fix/dfn-worklet-file into lotus 2026-10-28 20:42:25 -04:00
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Lotus CIandClaude Opus 5.5 e8a04fee20 fix(denoise): ship the DeepFilterNet 3 worklet as a file so it starts in the desktop app
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Reported: DeepFilterNet 3 "did not start" in a desktop call. Console:
"Loading the script blob:http://127.0.0.1:44548/… violates … script-src",
then "[lotus] denoise setProcessor failed … Failed to load worklet module".
deepfilternet3-noise-filter inlines its AudioWorklet as a string and loads it
from a blob: URL; audio worklets fall under script-src, and the desktop CSP
has no blob: there (the web call page has no script-src, so web was fine).

Instead of loosening the CSP, the build now writes the inline worklet to
denoise/deepfilternet/dfn-worklet.js and patches the copied module to load
it by URL (script-src self). The build fails if the library changes shape.

Verified in Chromium under the exact desktop CSP with the built assets:
before, DeepFilterNet fails as reported; after, it creates its node and, fed
4 s of white noise, cuts it by 60 dB (its configured level). RNNoise, Speex
and DTLN load as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5
 2026-10-28 20:19:02 -04:00