Added code

Source/FrameSequence.h

@@ -0,0 +1,71 @@
+/*
+  ==============================================================================
+
+    FrameSequence.h
+    Created: 11 Dec 2019 11:37:27am
+    Author:  除村 武志
+
+  ==============================================================================
+*/
+
+#pragma once
+#include <vector>
+
+struct FrameSequence
+{
+    std::vector<int> sequence;
+    bool isLooped = false;
+    bool hasRelease = false;
+    int loopStartIndex = 0;
+    int releaseSequenceStartIndex = 0;
+    static const int SHOULD_RETIRE = 65535;
+
+    int valueAt (int index)
+    {
+        if (index < 0 || index >= sequence.size())
+        {
+            return 0;
+        }
+
+        return sequence[index];
+    }
+
+    int nextIndexOf (int current)
+    {
+        if (current < releaseSequenceStartIndex)  // Hold
+        {
+            if (current == releaseSequenceStartIndex - 1)  // Reached to the end
+            {
+                if (isLooped)
+                {
+                    return loopStartIndex;
+                }
+                else
+                {
+                    return current; // Hold the last value
+                }
+            }
+            else
+            {
+                return current + 1;
+            }
+
+            // No reach here
+        }
+        else     // Released
+        {
+            if (current >= sequence.size() - 1)  // Reached to the end
+            {
+                return SHOULD_RETIRE;
+            }
+            else
+            {
+                return current + 1;
+            }
+
+            // No reach here
+        }
+
+        // No reach here
+    }
+};