Fixed some issues with IO channel counts in the StandaloneFilterWindow

examples/audio plugin demo/Source/PluginProcessor.cpp

@@ -134,6 +134,12 @@ void JuceDemoPluginAudioProcessor::process (AudioBuffer<FloatType>& buffer,
 {
     const int numSamples = buffer.getNumSamples();
 
+    // In case we have more outputs than inputs, we'll clear any output
+    // channels that didn't contain input data, (because these aren't
+    // guaranteed to be empty - they may contain garbage).
+    for (int i = getTotalNumInputChannels(); i < getTotalNumOutputChannels(); ++i)
+        buffer.clear (i, 0, numSamples);
+
     // Now pass any incoming midi messages to our keyboard state object, and let it
     // add messages to the buffer if the user is clicking on the on-screen keys
     keyboardState.processNextMidiBuffer (midiMessages, 0, numSamples, true);
@@ -144,12 +150,6 @@ void JuceDemoPluginAudioProcessor::process (AudioBuffer<FloatType>& buffer,
     // Apply our delay effect to the new output..
     applyDelay (buffer, delayBuffer);
 
-    // In case we have more outputs than inputs, we'll clear any output
-    // channels that didn't contain input data, (because these aren't
-    // guaranteed to be empty - they may contain garbage).
-    for (int i = getTotalNumInputChannels(); i < getTotalNumOutputChannels(); ++i)
-        buffer.clear (i, 0, numSamples);
-
     applyGain (buffer, delayBuffer); // apply our gain-change to the outgoing data..
 
     // Now ask the host for the current time so we can store it to be displayed later...

modules/juce_audio_basics/synthesisers/juce_Synthesiser.h

@@ -523,13 +523,17 @@ public:
                                  const MidiBuffer& inputMidi,
                                  int startSample,
                                  int numSamples)
-        { processNextBlock (outputAudio, inputMidi, startSample, numSamples); }
+    {
+        processNextBlock (outputAudio, inputMidi, startSample, numSamples);
+    }
 
     inline void renderNextBlock (AudioBuffer<double>& outputAudio,
                                  const MidiBuffer& inputMidi,
                                  int startSample,
                                  int numSamples)
-        { processNextBlock (outputAudio, inputMidi, startSample, numSamples); }
+    {
+        processNextBlock (outputAudio, inputMidi, startSample, numSamples);
+    }
 
     /** Returns the current target sample rate at which rendering is being done.
         Subclasses may need to know this so that they can pitch things correctly.

modules/juce_audio_plugin_client/Standalone/juce_StandaloneFilterWindow.h

@@ -247,21 +247,40 @@ public:
     {
         DialogWindow::LaunchOptions o;
 
-        auto totalInChannels  = processor->getMainBusNumInputChannels();
-        auto totalOutChannels = processor->getMainBusNumOutputChannels();
+        int minNumInputs  = std::numeric_limits<int>::max(), maxNumInputs  = 0,
+            minNumOutputs = std::numeric_limits<int>::max(), maxNumOutputs = 0;
 
         if (channelConfiguration.size() > 0)
         {
             auto defaultConfig = channelConfiguration.getReference (0);
-            totalInChannels  = defaultConfig.numIns;
-            totalOutChannels = defaultConfig.numOuts;
+            minNumInputs  = jmin (minNumInputs,  (int) defaultConfig.numIns);
+            maxNumInputs  = jmax (maxNumInputs,  (int) defaultConfig.numIns);
+            minNumOutputs = jmin (minNumOutputs, (int) defaultConfig.numOuts);
+            maxNumOutputs = jmax (maxNumOutputs, (int) defaultConfig.numOuts);
         }
 
+        if (auto* bus = processor->getBus (true, 0))
+        {
+            auto defaultNumChannels = bus->getDefaultLayout().size();
+            minNumInputs = jmin (minNumInputs, defaultNumChannels);
+            maxNumInputs = jmax (maxNumInputs, defaultNumChannels);
+        }
+
+        if (auto* bus = processor->getBus (false, 0))
+        {
+            auto defaultNumChannels = bus->getDefaultLayout().size();
+            minNumOutputs = jmin (minNumOutputs, defaultNumChannels);
+            maxNumOutputs = jmax (maxNumOutputs, defaultNumChannels);
+        }
+
+        minNumInputs  = jmin (minNumInputs,  maxNumInputs);
+        minNumOutputs = jmin (minNumOutputs, maxNumOutputs);
+
         o.content.setOwned (new SettingsComponent (*this, deviceManager,
-                                                          totalInChannels,
-                                                          totalInChannels,
-                                                          totalOutChannels,
-                                                          totalOutChannels));
+                                                          minNumInputs,
+                                                          maxNumInputs,
+                                                          minNumOutputs,
+                                                          maxNumOutputs));
         o.content->setSize (500, 550);
 
         o.dialogTitle                   = TRANS("Audio/MIDI Settings");

modules/juce_audio_processors/processors/juce_AudioProcessor.h

@@ -357,7 +357,7 @@ public:
 
         //==============================================================================
         /** The bus's current layout. This will be AudioChannelSet::disabled() if the current
-            layout is dfisabled.
+            layout is disabled.
             @see AudioChannelSet
         */
         const AudioChannelSet& getCurrentLayout() const noexcept        { return layout; }