Fixed MIDI track init

Author: FangCunWuChang

src/audioCore/graph/SeqSourceProcessor.cpp

@@ -334,6 +334,16 @@ void SeqSourceProcessor::applyMIDI() {
 	/** Callback */
 	auto callback = [ptr = SafePointer{ this }] {
 		if (ptr) {
+			/** Current MIDI Track Change */
+			if (ptr->getTotalMIDITrackNum() > 0
+				&& ptr->getCurrentMIDITrack() < 0) {
+				ptr->setCurrentMIDITrack(0);
+			}
+			if (ptr->getTotalMIDITrackNum() <= 0
+				&& ptr->getCurrentMIDITrack() >= 0) {
+				ptr->setCurrentMIDITrack(-1);
+			}
+
 			/** ARA Change */
 			if (auto plugin = ptr->getInstrProcessor()) {
 				plugin->invokeARADocumentContextChange();

src/audioCore/source/SourceInternalContainer.cpp

@@ -98,7 +98,10 @@ void SourceInternalContainer::initMidiData() {
 			this->midiData = std::make_unique<SourceMIDITemp>();
 		}
 
-		//this->midiData->addTrack(juce::MidiMessageSequence{});
+		/** Add First Track */
+		if (this->midiData->getTrackNum() <= 0) {
+			this->midiData->addTrack(juce::MidiMessageSequence{});
+		}
 
 		this->changed();
 	}