cmMidi.h/c : Added cmSciPitchToMidiPitch().

cmMidi.c

@@ -210,18 +210,11 @@ const char*     cmMidiToSciPitch( cmMidiByte_t pitch, char* label, unsigned labe
 }
 
 
-cmMidiByte_t    cmSciPitchToMidi( const char* sciPitchStr )
+cmMidiByte_t    cmSciPitchToMidiPitch( cmChar_t pitch, int acc, int octave )
 {
-  const char* cp      = sciPitchStr;
-  bool        sharpFl = false;
-  bool        flatFl  = false;
-  int         octave;
-  int         idx     = -1;
-
-  if( sciPitchStr==NULL || strlen(sciPitchStr) > 5 )
-    return kInvalidMidiPitch;
-
-  switch(tolower(*cp))
+  int idx = -1;
+  
+  switch(tolower(pitch))
   {
     case 'a': idx = 9;  break;
     case 'b': idx = 11; break;
@@ -234,6 +227,27 @@ cmMidiByte_t    cmSciPitchToMidi( const char* sciPitchStr )
       return kInvalidMidiPitch;
   }
 
+  unsigned rv =  (octave*12) + idx + acc + 12;
+
+  if( rv <= 127 )
+    return rv;
+
+  return kInvalidMidiPitch;
+
+}
+
+cmMidiByte_t    cmSciPitchToMidi( const char* sciPitchStr )
+{
+  const char* cp      = sciPitchStr;
+  bool        sharpFl = false;
+  bool        flatFl  = false;
+  int         octave;
+  int         acc     = 0;
+
+  if( sciPitchStr==NULL || strlen(sciPitchStr) > 5 )
+    return kInvalidMidiPitch;
+
+  // skip over leading letter
   ++cp;
 
   if( !(*cp) )
@@ -241,10 +255,10 @@ cmMidiByte_t    cmSciPitchToMidi( const char* sciPitchStr )
 
   
   if((sharpFl = *cp=='#') == true )
-    ++idx;
+    acc = 1;
   else
     if((flatFl  = *cp=='b') == true )
-      --idx;
+      acc = -1;
 
   if( sharpFl || flatFl )
   {
@@ -259,11 +273,7 @@ cmMidiByte_t    cmSciPitchToMidi( const char* sciPitchStr )
 
   octave = atoi(cp);
 
-  unsigned rv =  (octave*12) + idx + 12;
-  
-  if( rv <= 127 )
-    return rv;
 
-  return kInvalidMidiPitch;
+  return cmSciPitchToMidiPitch( *sciPitchStr, acc, octave );
   
 }

cmMidi.h

@@ -153,6 +153,11 @@ extern "C" {
   // If 'pitch' is outside of the range 0-127 then a blank string is returned.
   const char*     cmMidiToSciPitch( cmMidiByte_t pitch, char* label, unsigned labelCharCnt );
 
+  // Convert a scientific pitch to MIDI pitch.  acc == 1 == sharp, acc == -1 == flat.
+  // The pitch character must be in the range 'A' to 'G'. Upper or lower case is valid.
+  // Return kInvalidMidiPitch if the arguments are not valid. 
+  cmMidiByte_t    cmSciPitchToMidiPitch( cmChar_t pitch, int acc, int octave );
+
 
   // Scientific pitch string: [A-Ga-g][#b][#] where  # may be -1 to 9.
   // Return kInvalidMidiPitch if sciPtichStr does not contain a valid