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AU Client: Tweak saved version number of presets before restoring to allow restoring AUv3 state

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reuk 2023-08-09 20:30:06 +01:00
parent d47a7d18c1
commit d7f7bf98fa
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1 changed files with 21 additions and 0 deletions
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21
modules/juce_audio_plugin_client/juce_audio_plugin_client_AU_1.mm
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@ -785,6 +785,27 @@ public:
// Remove the data entry from the state to prevent the superclass loading the parameters
CFUniquePtr<CFMutableDictionaryRef> copyWithoutData (CFDictionaryCreateMutableCopy (nullptr, 0, (CFDictionaryRef) inData));
CFDictionaryRemoveValue (copyWithoutData.get(), CFSTR (kAUPresetDataKey));
auto* originalVersion = static_cast<CFNumberRef> (CFDictionaryGetValue (copyWithoutData.get(), CFSTR (kAUPresetVersionKey)));
if (originalVersion != nullptr && CFGetTypeID (originalVersion) == CFNumberGetTypeID())
{
SInt32 value = 0;
CFNumberGetValue (originalVersion, kCFNumberSInt32Type, &value);
// Data with a version of "1" is generated by AUv3 plug-ins.
// This data appears to be compatible with RestoreState below, but RestoreState
// fails when "version" is not 0.
// We only overwrite the version if it is 1 so that if future preset versions are
// completely incompatible, RestoreState will be bypassed rather than passed data
// which could put the plugin into a broken state.
if (value == 1)
{
const SInt32 zero = 0;
CFUniquePtr<CFNumberRef> newVersion (CFNumberCreate (nullptr, kCFNumberSInt32Type, &zero));
CFDictionarySetValue (copyWithoutData.get(), CFSTR (kAUPresetVersionKey), newVersion.get());
}
}
ComponentResult err = MusicDeviceBase::RestoreState (copyWithoutData.get());
if (err != noErr)