Fixed dropped MIDI messages in AudioProcessorGraph with large buffer sizes

modules/juce_audio_processors/processors/juce_AudioProcessorGraph.cpp

@@ -47,18 +47,21 @@ struct GraphRenderSequence
 
         if (numSamples > maxSamples)
         {
-            // being asked to render more samples than our buffers have, so slice things up...
-            tempMIDI.clear();
-            tempMIDI.addEvents (midiMessages, maxSamples, numSamples, -maxSamples);
-
+            // Being asked to render more samples than our buffers have, so divide the buffer into chunks
+            int chunkStartSample = 0;
+            while (chunkStartSample < numSamples)
             {
-                AudioBuffer<FloatType> startAudio (buffer.getArrayOfWritePointers(), buffer.getNumChannels(), maxSamples);
-                midiMessages.clear (maxSamples, numSamples);
-                perform (startAudio, midiMessages, audioPlayHead);
+                auto chunkSize = jmin (maxSamples, numSamples - chunkStartSample);
+
+                AudioBuffer<FloatType> audioChunk (buffer.getArrayOfWritePointers(), buffer.getNumChannels(), chunkStartSample, chunkSize);
+                midiChunk.clear();
+                midiChunk.addEvents (midiMessages, chunkStartSample, chunkSize, -chunkStartSample);
+
+                perform (audioChunk, midiChunk, audioPlayHead);
+
+                chunkStartSample += maxSamples;
             }
 
-            AudioBuffer<FloatType> endAudio (buffer.getArrayOfWritePointers(), buffer.getNumChannels(), maxSamples, numSamples - maxSamples);
-            perform (endAudio, tempMIDI, audioPlayHead);
             return;
         }
 
@@ -145,7 +148,7 @@ struct GraphRenderSequence
 
         const int defaultMIDIBufferSize = 512;
 
-        tempMIDI.ensureSize (defaultMIDIBufferSize);
+        midiChunk.ensureSize (defaultMIDIBufferSize);
 
         for (auto&& m : midiBuffers)
             m.ensureSize (defaultMIDIBufferSize);
@@ -170,7 +173,7 @@ struct GraphRenderSequence
     MidiBuffer currentMidiOutputBuffer;
 
     Array<MidiBuffer> midiBuffers;
-    MidiBuffer tempMIDI;
+    MidiBuffer midiChunk;
 
 private:
     //==============================================================================