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Jafz2001andClaude Fable 5
a52361fdda
MemoryBlock::fromBase64Encoding only parses JUCE's proprietary
"<size>.<alphabet>" format and returns false on standard RFC-4648 base64 —
which is what the Python-side plugins (rig_builder) emit for per-slot state.
That silent false meant LoadPresetWorker/SetSlotState never called setState()
for those slots, so IR stages lost their per-stage `gain` (cab loudness makeup,
amp-trim impulse compensation) on every chain load.
Add decodeStateBlob(): JUCE format first (engine-native saves unchanged), then
a standard-base64 fallback via juce::Base64 — gated to IR/NAM slots only, whose
processors take exactly the JSON these states carry ({"irPath","gain"} /
{"modelPath",...}). VST slots keep the JUCE-only decode: their plugin-emitted
blobs are metadata wrappers, not real setStateInformation() chunks.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>