Refactor: move Wave class to own header

Refs: #2

src/wave.h

@@ -0,0 +1,35 @@
+#ifndef WAVE_H_
+#define WAVE_H_
+
+#include <array>
+#include <cstdint>
+#include <iostream>
+
+#include <math.h>
+
+const uint16_t DEFAULT_N_SAMPLES = 1024;
+
+/* Single cycle wave object with lookup table */
+class Wave {
+private:
+  uint16_t m_id{};                                // Unique ID number of wave
+  std::array<float_t, DEFAULT_N_SAMPLES> m_table; // table data
+public:
+  Wave(uint16_t id) : m_id{id}, m_table{} {
+    // Do nothing
+  }
+
+  uint16_t id() { return m_id; }
+
+  void set_table(std::array<float_t, DEFAULT_N_SAMPLES> table) {
+    m_table = table;
+  }
+
+  void print_head() {
+    for (uint8_t i = 0; i < 10; i++) {
+      std::cout << m_table[i] << '\n';
+    }
+  }
+};
+
+#endif // WAVE_H_

src/wtpp.cpp

@@ -7,36 +7,10 @@
 
 #include <math.h>
 
+#include "wave.h"
+
 static const uint32_t DEFAULT_SAMPLE_RATE = 44100; // 44.1 kHz sampling rate
 static const uint8_t DEFAULT_BIT_DEPTH = 12;
-static const uint16_t DEFAULT_N_SAMPLES = 1024;
-
-/* Single cycle wave object with lookup table */
-class Wave
-{
-private:
-  uint16_t m_id{}; // Unique ID number of wave
-  std::array<float_t, DEFAULT_N_SAMPLES> m_table; // table data
-public:
-  Wave(uint16_t id) : m_id{id}, m_table{}
-  {
-    // Do nothing
-  }
-
-  uint16_t id() {
-    return m_id;
-  }
-
-  void set_table(std::array<float_t, DEFAULT_N_SAMPLES> table) {
-    m_table = table;
-  }
-
-  void print_head() {
-    for (uint8_t i = 0; i < 10; i++) {
-      std::cout << m_table[i] << '\n';
-    }
-  }
-};
 
 /* Table of single cycle wave lookup tables */
 class Wavetable