From 84cff02e8cf3b773d2370d8020b8d1f4b95bcda9 Mon Sep 17 00:00:00 2001
From: Davide Morelli <morellid@users.sourceforge.net>
Date: Wed, 30 Nov 2005 17:31:33 +0000
Subject: going little further with common functions

svn path=/trunk/externals/frankenstein/; revision=4091
---
 common.c | 104 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 100 insertions(+), 4 deletions(-)

(limited to 'common.c')

diff --git a/common.c b/common.c
index 1eb896f..6f82204 100755
--- a/common.c
+++ b/common.c
@@ -1,21 +1,27 @@
 
 #include "common.h"
 
+#include <math.h>
+#include <stdlib.h>
+
+#include "m_pd.h" // to post errors and debug messages
+
 t_duration int2duration(int n)
 {
 	t_duration dur;
-	int curr, i, j, ok;
+	int curr, i, j, ok, currden;
 	curr=0;
 	ok=0;
 	for (i=0; i<num_possible_denominators; i++)
 	{
-		for (j=0; j<i; j++)
+		currden = possible_denominators[i];
+		for (j=0; j<currden; j++)
 		{
 			if (curr==n)
 			{
 				dur.numerator=j;
-				dur.denominator=i;
-				j=i;
+				dur.denominator=currden;
+				j=currden;
 				i=num_possible_denominators;
 				ok=1;
 			} else
@@ -60,4 +66,94 @@ int possible_durations()
 	}
 	ris += 1;
 	return ris;
+}
+
+t_duration float2duration(float fduration)
+{
+	float minDiff, currfduration, currDiff;
+	int i, maxi;
+	t_duration currDur, bestDur;
+
+	bestDur.numerator=1;
+	bestDur.denominator=1;
+	minDiff = 1;
+	maxi = possible_durations();
+	for (i=0; i<maxi; i++)
+	{
+	//	post("i=%i", i);
+		currDur = int2duration(i);
+	//	post("currDur=%i/%i", currDur.numerator, currDur.denominator);
+		currfduration = duration2float(currDur);
+	//	post("currfduration=%f", currfduration);
+		currDiff = (float) fabs(fduration - currfduration);
+		if (currDiff<=minDiff)
+		{
+			minDiff = currDiff;
+			bestDur = currDur;
+		}
+	}
+	return bestDur;
+}
+
+float duration2float(t_duration duration)
+{
+	return (float) (((float)duration.numerator) / ((float)duration.denominator));
+}
+
+void setFirstBeat(t_rhythm_event **firstEvent, unsigned short int voice, float fduration)
+{
+	t_duration res;
+	t_rhythm_event *newElement;
+	// convert from float to duration
+	res = float2duration(fduration);
+	// allocate a new element of the list
+	newElement = malloc(sizeof(t_rhythm_event));
+	// set the pointers
+	newElement->previous = 0;
+	newElement->next = 0;
+	newElement->voice=voice;
+	newElement->duration.numerator = res.numerator;
+	newElement->duration.denominator = res.denominator;
+	*firstEvent = newElement;
+}
+
+void concatenateBeat(t_rhythm_event *currentEvent, unsigned short int voice, float fduration)
+{
+	t_duration res;
+	t_rhythm_event *newElement, *lastElement;
+	lastElement = currentEvent;
+	while(lastElement->next)
+		lastElement = lastElement->next;
+	// convert from float to duration
+	res = float2duration(fduration);
+	// allocate a new element of the list
+	newElement = (t_rhythm_event *) malloc(sizeof(t_rhythm_event));
+	// set the pointers
+	newElement->previous = lastElement;
+	newElement->next = 0;
+	lastElement->next = newElement;
+	newElement->voice=voice;
+	newElement->duration.numerator = res.numerator;
+	newElement->duration.denominator = res.denominator;
+
+}
+
+void freeBeats(t_rhythm_event *currentEvent)
+{
+	t_rhythm_event *prev;
+	t_rhythm_event *next;
+
+	// go to the first element of the list
+	while(currentEvent->previous)
+		currentEvent = currentEvent->previous;
+
+	// now free each element
+	next=currentEvent->next;
+	do
+	{
+		prev = currentEvent;
+		next = currentEvent->next;
+		free(currentEvent);
+	} while(next);
+
 }
\ No newline at end of file
-- 
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