initial import of powerchord courtesy Camilo Mesias <mailto:camilo@mesias.co.uk>

modified some bits to be compatible with the opie build system
packaging not complete yet
i hope camilo will maintain this here...

1 files changed, 124 insertions, 0 deletions

diff --git a/noncore/multimedia/powerchord/chordengine.h b/noncore/multimedia/powerchord/chordengine.h
new file mode 100644
index 0000000..44b7388
--- a/dev/null
+++ b/noncore/multimedia/powerchord/chordengine.h
@@ -0,0 +1,124 @@
+//
+// ChordEngine class to calculate chords
+//
+
+// Copyright (c) 2001 Camilo Mesias
+// camilo@mesias.co.uk
+//
+// derived from JavaScript code by Jim Cranwell, used with permission
+//
+// This program is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public License
+// as published by the Free Software Foundation; either version 2
+// of the License, or (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+
+#ifndef __CHORDENGINE_H
+#define __CHORDENGINE_H
+
+#include <stdio.h>
+
+class ChordEngine;
+
+class ChordEngine {
+
+ private:
+  //saved state
+
+  int base_note;
+  int chord_type;
+  int fret_pos;
+  int span_size;
+  int variation;
+  int tuning;
+  
+  int string[6];
+  const char *notename[6];
+
+  // unfathomable stuff ported from javascript: js_prefix
+  // may ask Jim Cranwell if he'd like to comment on it
+  int js_MMM[6];
+  int note_indices[6];
+
+  void js_tunit(int t);
+
+  int js_T[12];
+
+  void js_whatchord(int c);
+
+  int js_L, js_Y, js_Z, js_VM;
+
+  void js_vboy(int v);
+
+  // stuff I put in
+  char label_text[20];
+  static const int chordbases[][12];
+  static const int alt_tunings[][6];
+
+ public:
+  static const char* notes[];
+  static const char* keys[];
+  static const char* frets[];
+  static const char* variations[];
+  static const char* tunings[];
+
+
+  static const int OPEN = 0;
+  static const int MUTED = 7;
+
+  ChordEngine();
+
+  // accessors
+  const char *name(int f){return notename[f];};
+  int noteindex(int f){
+    if (string[f] == MUTED){
+      return -1;
+    }else{
+      return note_indices[f] + string[f];
+    }
+  };
+
+  void base(int b){base_note = b;};
+  int base(){return base_note;};
+
+  void chord(int c){chord_type = c; js_whatchord(c);};
+  int chord(){return chord_type;};
+
+  void fret(int f){fret_pos = f;};
+  int fret(){return fret_pos;};
+
+  void span(int s){span_size = s;};
+  int span(){return span_size;};
+
+  void vary(int v){variation = v; js_vboy(v);};
+  int vary(){return variation;};
+
+  void tune(int t){tuning = t; js_tunit(t);};
+  int tune(){return tuning;};
+
+  // methods
+  void calculate();
+
+  const char *label(){return label_text;};
+  
+  int finger(int string); // returns fret position or MUTED
+
+};
+
+#endif
+
+
+
+
+
+
+