Method loadPlugin

Source/PluginProcessor.cpp:60–124

}

bool PluginProcessor::loadPlugin(double sampleRate, int samplesPerBlock) {
  OwnedArray<PluginDescription> pluginDescriptions;
  KnownPluginList pluginList;
  AudioPluginFormatManager pluginFormatManager;

  pluginFormatManager.addDefaultFormats();

  for (int i = pluginFormatManager.getNumFormats(); --i >= 0;) {
    pluginList.scanAndAddFile(String(myPluginPath), true, pluginDescriptions,
                              *pluginFormatManager.getFormat(i));
  }

  if (myPlugin.get()) {
    myPlugin.get()->releaseResources();
    myPlugin.reset();
  }

  // If there is a problem here first check the preprocessor definitions
  // in the projucer are sensible - is it set up to scan for plugin's?
  if (pluginDescriptions.size() <= 0) {
    throw std::runtime_error("Unable to load plugin.");
  }

  String errorMessage;

  myPlugin = pluginFormatManager.createPluginInstance(
      *pluginDescriptions[0], sampleRate, samplesPerBlock, errorMessage);

  if (myPlugin.get() == nullptr) {
    throw std::runtime_error("PluginProcessor::loadPlugin error: " +
                             errorMessage.toStdString());
  }
  // We loaded the plugin.

  auto outputs = myPlugin->getTotalNumOutputChannels();

  if (outputs == 0) {
    myPlugin->enableAllBuses();
    myPlugin->disableNonMainBuses();
    outputs = myPlugin->getTotalNumOutputChannels();
  }
  auto inputs = myPlugin->getTotalNumInputChannels();

  ProcessorBase::setBusesLayout(myPlugin->getBusesLayout());

  this->setPlayConfigDetails(inputs, outputs, sampleRate, samplesPerBlock);
  myPlugin->prepareToPlay(sampleRate, samplesPerBlock);
  myPlugin->setNonRealtime(true);
  mySampleRate = sampleRate;

  createParameterLayout();

  {
    // Process a block of silence a few times to "warm up" the processor.
    juce::AudioSampleBuffer audioBuffer =
        AudioSampleBuffer(std::max(inputs, outputs), samplesPerBlock);
    MidiBuffer emptyMidiBuffer;
    for (int i = 0; i < 5; i++) {