Improve audio and midi support.

src/audio/midi/reader/MidiReader.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include "MidiDocument.h"
+#include "MetaMidiEvent.h"
+#include "MidiTrack.h"
+#include "MidiChannelEvent.h"
+#include "File.h"
+#include <string>
+
+class MidiReader
+{
+    static constexpr const char TrackChunkLabel[] = "MTrk";
+    static constexpr const char HeaderLabel[] = "MThd";
+
+public:
+
+    MidiReader();
+
+    void Read(const std::string& path);
+
+    MidiDocument* GetDocument() const;
+
+private:
+
+    bool ProcessHeader();
+    bool ProcessTrackChunk(bool debug=false);
+    int ProcessEvent(MidiTrack* track);
+
+private:
+
+    std::unique_ptr<File> mFile;
+    MidiDocumentPtr mDocument;
+    int mLastMidiChannel {0};
+    MidiChannelEvent::Type mLastChannelEventType;
+};