Diff: Player/Note.cpp

Revision:

0:7a56bf0441ea

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Player/Note.cpp	Wed Dec 09 01:38:08 2015 +0000
@@ -0,0 +1,74 @@
+#include "Note.h"
+
+int const WHOLE = 1920;
+
+Note::Note(int pitch, int dur, bool tie) {
+    this->pitch = pitch;
+    this->dur = dur;
+    this->tie = tie;
+}
+
+Note::Note(const char* s) {
+    char c = *s;
+    pitch = ('A' <= c && c <= 'G') ? (5 * (c - 'A') + 1) / 3 : -1;
+
+    if (pitch != -1) {
+        c = *++s;
+        while (c < '0' || '9' < c) {
+            if (c == '#') {
+                pitch++;
+            } else if (c == 'b') {
+                pitch--;
+            }
+            c = *++s;
+        }
+        if (pitch < 3) {
+            pitch += 12;
+        }
+        pitch += (c - '0') * 12 + 9;
+    } else {
+        pitch = 0;
+    }
+
+    s++;
+    dur = 0;
+    tie = false;
+    while (*s) {
+        switch (*s++) {
+            case 'w':
+                dur += WHOLE; //whole note
+                break;
+            case 'h':
+                dur += WHOLE / 2; // half note
+                break;
+            case 'q':
+                dur += WHOLE / 4; // quarter
+                break;
+            case 'i':
+                dur += WHOLE / 8; // eighth
+                break;
+            case 's':
+                dur += WHOLE / 16; // sixteenth
+                break;
+            case 't':
+                dur += WHOLE / 32; // thirty-second
+                break;
+            case 'x':
+                dur += WHOLE / 64; // sixty-fourth
+                break;
+            case 'o':
+                dur += WHOLE / 128; // one-twenty-eighth
+                break;
+            case '.': // dot - only single . is supported
+                dur += dur / 2;
+                break;
+            case '/': // triplet
+                dur = dur * 2 / 3;
+                break;
+            case '-':
+            case '_':
+                tie = true;
+                break;
+        }
+    }
+}
\ No newline at end of file