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Add .aupreset support #171

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23 changes: 22 additions & 1 deletion pedalboard/ExternalPlugin.h
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Original file line number Diff line number Diff line change
Expand Up @@ -423,6 +423,23 @@ template <typename ExternalPluginType> class ExternalPlugin : public Plugin {
presetFilePath);
}
}

void visitAudioUnitClient(
const juce::ExtensionsVisitor::AudioUnitClient &client) override {
juce::File presetFile(presetFilePath);
juce::MemoryBlock presetData;

if (!presetFile.loadFileAsData(presetData)) {
throw std::runtime_error("Failed to read preset file: " +
presetFilePath);
}

if (!client.setPreset(presetData)) {
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I don't know that this will work - the JUCE code doesn't seem to have a setPreset method on AudioUnitClient:

    struct AudioUnitClient
    {
        virtual ~AudioUnitClient() = default;
        virtual AudioUnit getAudioUnitHandle() const noexcept = 0;
    };

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Older thread:

And more specific feature request thread that I just opened for this:

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@0xdevalias 0xdevalias May 16, 2024 •
edited
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Related technical docs:

  • https://developer.apple.com/documentation/audiotoolbox/auaudiounitpreset

    • AUAudioUnitPreset

    • The AUAudioUnitPreset class describes an interface for custom parameter settings provided by the audio unit developer. These presets often produce a useful sound or starting point.

    • For more details on working with Audio Unit presets, see Audio Units - How to correctly save and restore Audio Unit presets. Note that the version 3 fullState property is bridged to the version 2 kAudioUnitProperty_ClassInfo API. Similarly, the version 3 fullStateForDocument property is bridged to the version 2 kAudioUnitProperty_ClassInfoFromDocument API.

  • https://developer.apple.com/library/archive/technotes/tn2157/_index.html

    • Technical Note TN2157
      Audio Units - How to correctly save and restore Audio Unit presets.

throw std::runtime_error(
"Plugin returned an error when loading data from preset file: " +
presetFilePath);
}
}
};

void loadPresetData(std::string presetFilePath) {
Expand Down Expand Up @@ -1067,6 +1084,10 @@ inline void init_external_plugins(py::module &m) {
ss << ">";
return ss.str();
})
.def("load_preset",
&ExternalPlugin<juce::AudioUnitPluginFormat>::loadPresetData,
"Load a Audio Unit preset file in .aupreset format.",
py::arg("preset_file_path"))
.def_static(
"get_plugin_names_for_file",
[](std::string filename) {
Expand Down Expand Up @@ -1110,4 +1131,4 @@ inline void init_external_plugins(py::module &m) {
#endif
}

} // namespace Pedalboard
} // namespace Pedalboard
175 changes: 175 additions & 0 deletions tests/presets/DEX.aupreset
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Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,175 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
<key>data</key>
<data>
AAAAAAAAAAAAAACbAAAAMD+AAAAAAAAxAAAAAAAAADI/gAAAAAAAMz8AAAAAAAA0P4AA
AAAAADU/gAAAAAAANj+AAAAAAAA3PrUClgAAADgAAAAAAAAAOQAAAAAAAAYfAAAAAAAA
BiA/gAAAAAAGIQAAAAAAAAYiPwAAAAAABiM+2223AAAGJD+AAAAAAAYlP4AAAAAABiY/
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AAAAAAZkAAAAAAAABmUAAAAAAAAGZgAAAAAAAAZ8AAAAAAAABn0AAAAAAAAGfgAAAAAA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</data>
<key>element-name</key>
<dict>
<key>2</key>
<dict>
<key>0</key>
<string>Output</string>
</dict>
</dict>
<key>jucePluginState</key>
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</data>
<key>manufacturer</key>
<integer>1145525058</integer>
<key>name</key>
<string>Default-1</string>
<key>subtype</key>
<integer>1147500644</integer>
<key>type</key>
<integer>1635085685</integer>
<key>version</key>
<integer>0</integer>
</dict>
</plist>
25 changes: 25 additions & 0 deletions tests/test_external_plugins.py
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -233,6 +233,31 @@ def test_preset_parameters(plugin_filename: str, plugin_preset: str):
actual != default
), f"Expected attribute {name} to be different from default ({default}), but was {actual}"

@pytest.mark.parametrize(
"plugin_filename,plugin_preset",
[
(plugin, os.path.join(TEST_PRESET_BASE_PATH, plugin + ".aupreset"))
for plugin in AVAILABLE_PLUGINS_IN_TEST_ENVIRONMENT
if os.path.isfile(os.path.join(TEST_PRESET_BASE_PATH, plugin + ".aupreset"))
],
)
def test_preset_parameters(plugin_filename: str, plugin_preset: str):
# plugin with default params.
plugin = load_test_plugin(plugin_filename)

default_params = {k: v.raw_value for k, v in plugin.parameters.items() if v.type == float}

# load preset file
plugin.load_preset(plugin_preset)

for name, default in default_params.items():
actual = getattr(plugin, name)
if math.isnan(actual):
continue
assert (
actual != default
), f"Expected attribute {name} to be different from default ({default}), but was {actual}"


@pytest.mark.parametrize("plugin_filename", AVAILABLE_PLUGINS_IN_TEST_ENVIRONMENT)
def test_initial_parameters(plugin_filename: str):
Expand Down