Bela: Support for analog inputs

modules/juce_audio_devices/native/juce_linux_Bela.cpp

@@ -89,6 +89,11 @@ public:
         return devices;
     }
 
+    void pushMidiMessage (juce::MidiMessage& message)
+    {
+        concatenator.pushMidiData (message.getRawData(), message.getRawDataSize(), Time::getMillisecondCounter() * 0.001, midiInput, *midiCallback);
+    }
+
 private:
     void pushMidiData (int length)
     {
@@ -182,6 +187,9 @@ public:
                                           BelaAudioIODevice::belaTypeName)
     {
         Bela_defaultSettings (&defaultSettings);
+
+        if (includeAnalogSupport)
+            analogInputs.resize (8);
     }
 
     ~BelaAudioIODevice()
@@ -213,7 +221,7 @@ public:
         auto numIns = getNumContiguousSetBits (inputChannels);
         auto numOuts = getNumContiguousSetBits (outputChannels);
 
-        settings.useAnalog            = 0;
+        settings.useAnalog            = includeAnalogSupport ? 1 : 0;
         settings.useDigital           = 0;
         settings.numAudioInChannels   = numIns;
         settings.numAudioOutChannels  = numOuts;
@@ -353,6 +361,7 @@ public:
     static const char* const belaTypeName;
 
 private:
+
     //==============================================================================
     bool setup (BelaContext& context)
     {
@@ -377,6 +386,9 @@ private:
 
         ScopedLock lock (callbackLock);
 
+        if (includeAnalogSupport)
+            updateAnalogInputs (context);
+
         // Check for and process and midi
         for (auto midiInput : BelaMidiInput::midiInputs)
             midiInput->poll();
@@ -448,6 +460,39 @@ private:
             callback->audioDeviceStopped();
     }
 
+    void updateAnalogInputs (BelaContext& context)
+    {
+        for (size_t i = 0; i < 8; i++)
+        {
+            auto v = analogRead (&context, 0, static_cast<int> (i));
+
+            if (fabs (analogInputs[i].previousInput - v) > 1.0f/512.0f)
+            {
+                auto controlValue = int (v * 127.0);
+
+                if (analogInputs[i].previousControlValue != controlValue)
+                {
+                    // Consider this to have moved
+                    analogInputs[i].previousInput        = v;
+                    analogInputs[i].previousControlValue = controlValue;
+
+                    auto message = MidiMessage::controllerEvent (1, 16 + i, controlValue);
+
+                    for (auto midiInput : BelaMidiInput::midiInputs)
+                        midiInput->pushMidiMessage (message);
+                }
+            }
+        }
+    }
+
+    struct AnalogInput
+    {
+        float previousInput        = 0;
+        int   previousControlValue = 0;
+    };
+
+    std::vector<AnalogInput> analogInputs;
+
 
     //==============================================================================
     uint64_t expectedElapsedAudioSamples = 0;
@@ -494,6 +539,8 @@ private:
     HeapBlock<const float*> channelInBuffer;
     HeapBlock<float*> channelOutBuffer;
 
+    bool includeAnalogSupport = true;
+
     JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BelaAudioIODevice)
 };