diff options
| author | Davide Morelli <morellid@users.sourceforge.net> | 2005-11-29 18:04:09 +0000 |
|---|---|---|
| committer | Davide Morelli <morellid@users.sourceforge.net> | 2005-11-29 18:04:09 +0000 |
| commit | 8911ddbc575c4714c5ac294dd32bbd9ab4278a2d (patch) | |
| tree | a02a04e2ab02abc133a5c96b70788f9da9fb48c0 | |
| parent | eb9ef05774af20edb43118182834c18a4ac70707 (diff) | |
adding shared functions
svn path=/trunk/externals/frankenstein/; revision=4081
| -rwxr-xr-x | common.c | 63 | ||||
| -rwxr-xr-x | common.h | 81 |
2 files changed, 144 insertions, 0 deletions
diff --git a/common.c b/common.c new file mode 100755 index 0000000..1eb896f --- /dev/null +++ b/common.c @@ -0,0 +1,63 @@ +
+#include "common.h"
+
+t_duration int2duration(int n)
+{
+ t_duration dur;
+ int curr, i, j, ok;
+ curr=0;
+ ok=0;
+ for (i=0; i<num_possible_denominators; i++)
+ {
+ for (j=0; j<i; j++)
+ {
+ if (curr==n)
+ {
+ dur.numerator=j;
+ dur.denominator=i;
+ j=i;
+ i=num_possible_denominators;
+ ok=1;
+ } else
+ curr++;
+ }
+ }
+ if (ok)
+ return dur;
+ else
+ {
+ dur.numerator=1;
+ dur.denominator=1;
+ return dur;
+ }
+}
+
+unsigned short int duration2int(t_duration dur)
+{
+ unsigned short int curr, i, j;
+ curr=0;
+ for (i=0; i<num_possible_denominators; i++)
+ {
+ for (j=0; j<i; j++)
+ {
+ if ((dur.numerator==j) && (dur.denominator==i))
+ {
+ return curr;
+ } else
+ curr++;
+ }
+ }
+ return curr+1;
+}
+
+int possible_durations()
+{
+ int ris, i;
+ ris = 0;
+ for (i=0; i<num_possible_denominators; i++)
+ {
+ ris += possible_denominators[i]-1;
+ }
+ ris += 1;
+ return ris;
+}
\ No newline at end of file diff --git a/common.h b/common.h new file mode 100755 index 0000000..07b15e1 --- /dev/null +++ b/common.h @@ -0,0 +1,81 @@ +// here i put common data structures and functions
+
+// --------- theme notation
+
+// data structures
+
+typedef struct _note
+{
+ unsigned short int played; // 0 if is a rest, 1 if played
+ unsigned short int chord; // 0 if is not a chord (strong) note, 1 if it is
+ unsigned short int diatonic; // 0 if is a note not belonging to this tonality
+ int interval; // semitones from prefious note
+} t_note;
+
+typedef struct _duration
+{
+ int numerator; // like in music notation: in a 1/4 note the numerator is 1
+ int denominator; // like in music notation: in a 1/4 note the denominator is 4
+} t_duration;
+
+typedef struct _note_event
+{
+ unsigned short int voice;
+ t_note note;
+ t_duration duration;
+ struct t_note_event *previous; // this is a list, link to the previous element
+ struct t_note_event *next; // this is a list, link to the next element
+} t_note_event;
+
+// manipolation functions
+
+// TODO:
+// - from data structures to lists of numbers and vice versa
+// - from a (voice, rest, duration) representation to (voice, start, duration) and viceversa
+
+// --------- rhythm notation
+
+// data structures
+
+typedef struct _rhythm_event
+{
+ unsigned short int voice;
+ t_duration duration;
+ struct t_rhythm_event *previous; // this is a list, link to the previous element
+ struct t_rhythm_event *next; // this is a list, link to the next element
+} t_rhythm_event;
+
+// rhythms memory graph
+
+/*
+// list implementation
+// this implements a graph that stores the memory of the current rhythm sub-elements
+// list of links
+typedef struct _rhythm_memory_arc
+{
+ float weight;
+ struct t_rhythm_memory_node *to_node; // the target of this link (arc)
+ struct t_rhythm_memory_arc *next_arc; // next link in the list
+} t_rhythm_memory_arc;
+// graph node
+typedef struct _rhythm_memory_node
+{
+ t_duration duration;
+ struct t_rhythm_memory_arc *arcs; // the list of arcs to other nodes
+} t_rhythm_memory_node;
+*/
+// with a table
+// simpler and most of all non recursive when searching nodes!
+#define num_possible_denominators 11
+unsigned short int possible_denominators[] = {1,2,3,4,6,8,12,16,18,24,32};
+// functions needed to fill and use the memory table
+t_duration int2duration(int n);
+unsigned short int duration2int(t_duration dur);
+int possible_durations();
+
+// manipolation functions
+
+// TODO:
+// - from data structures to lists of numbers and vice versa
+// - from a (voice, duration) representation to (voice, start, duration) and viceversa
+
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