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Jafz2001andClaude Opus 4.8
23047291e3
A sandboxed (out-of-process) VST3 exposes no host-side JUCE parameter proxies, so SignalChain::getParameters returned an empty list for it. That left the renderer with no way to read a plugin's live values — the plugin's own editor window could not be mirrored back into the in-app UI, and "Capture state" was a no-op for sandboxed gear. - vst-host/main.cpp: implement the (already-declared) op::kListParameters handler, replying with each parameter's index/name/value(0..1)/label/text from the child's live AudioProcessor. - SandboxedProcessor::listSandboxedParameters(): blocking control-pipe round-trip returning the reply's params array. - SignalChain::getParameters: resolve the slot under the audio lock, then do the sandboxed IPC AFTER releasing it (a blocking round-trip must not stall processBlock) — same discipline getStateInformation() already uses. In-process plugins still read their JUCE proxies directly under the lock. Verified end-to-end against a bundled VST3: getParameters now returns live values and setParameter -> getParameters round-trips. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>